This document provides a summary of a patent application for improvements to a suction cleaning nozzle. Specifically, it aims to overcome the difficulty of litter adhering to the inside of the suction nozzle and conduit by supplying pressurized water through ejection openings. The ejected water spreads as a film along the inside surfaces to sweep away any adhered litter and prevent clogging. The water ejection openings are located to ensure the water film sweeps all relevant inside surfaces under the influence of the blowing and suction air.
This document describes a steam trap patent from 1957. The steam trap uses a rotary member controlled by a bimetallic strip to vary the size of the discharge opening and allow condensate to drain while preventing steam from escaping. It provides a constantly open minimum opening, and the bimetallic strip automatically enlarges the opening when more condensate is present, such as during startup. The rotary member design allows for rapid response to temperature changes and a compact design that can be installed directly in a pipe line.
This document summarizes a patent application for improvements to cooling sintered and loose solid materials using an apparatus of overlapping trays carried by an endless chain. The trays have perforated surfaces (grates) above the bottom for supporting material, and air conduits below the grates with exit apertures for supplying cooling air. Compartments between the conduits and grates collect material that falls through the perforations. Diagrams show the construction and modifications of the trays, grates, and air conduits.
This document summarizes a patent application for improvements to cooling sintered and loose solid materials using an apparatus of overlapping trays carried by an endless chain. The trays have perforated surfaces for supporting material and conduits below for flowing a cooling gas. The conduits have lateral openings to allow gas to enter compartments below the perforated surfaces, where collected material can be cooled without falling through the tray bottoms. Diagrams show variations of the conduit and perforated surface configurations within the trays.
This document describes a spray booth patent from 1957. Key features include:
1) The spray booth uses exhausted ventilation air to pneumatically convey water droplets from the bottom basin to retainers in an exhaust duct above overflow devices, allowing the water to flow back by gravity.
2) This eliminates the need for a circulation pump and reduces clogging from paint in the water compared to pump circulation.
3) The spray booth operates by exhausting air through the operating chamber, which pulls water droplets up from the bottom basin to collectors above before exiting through the exhaust duct.
This document describes a patent for an improved electrical heater element. It consists of an outer tubular sheath filled with compacted insulation and containing longitudinally extending conductors connected to terminals protruding from one end of the sheath. A plug of heat-resistant resilient material is located in and gripped by the end of the sheath such that it protrudes and locates the terminals. The resistance wire is packed with insulating powder and the end with the rubber plug is swaged to tightly compress the plug and permanently hold it.
This document describes a 1957 patent for an oscillating column combustion apparatus. The apparatus has a combustion chamber and pulsating tube that form an acoustic resonator. It is an improvement over prior designs by introducing the combustion mixture tangentially into the cylindrical combustion chamber through a mixing tube. This causes the mixture to circulate and thermally prepare along the hot chamber walls before igniting, overcoming issues with deposits clogging inlet throats in previous models. The pulsating tube can be arranged coaxially to induce better vortexing for ignition.
This document describes a closure member for cistern overflow pipes that prevents air currents from entering the cistern. It consists of a housing with a vertically disposed inlet tube containing a buoyant cork ball closure member. When the liquid level in the cistern rises, the cork ball is displaced upwards, allowing overflow to pass through the outlet. When the level falls, the cork ball returns to its seating under gravity, blocking air flow into the cistern.
This document describes British patent GB784988(A) from 1957 regarding improvements to pressure-operated gas relay valves. Specifically, it introduces a weight supported by the valve-controlling diaphragm that is lifted off during valve closure by an adjustable stop, temporarily arresting closure to provide a steady gas flow to appliances like furnaces. It provides diagrams and descriptions of the valve components and how the added weight allows a third stage of gas flow control.
This document describes a steam trap patent from 1957. The steam trap uses a rotary member controlled by a bimetallic strip to vary the size of the discharge opening and allow condensate to drain while preventing steam from escaping. It provides a constantly open minimum opening, and the bimetallic strip automatically enlarges the opening when more condensate is present, such as during startup. The rotary member design allows for rapid response to temperature changes and a compact design that can be installed directly in a pipe line.
This document summarizes a patent application for improvements to cooling sintered and loose solid materials using an apparatus of overlapping trays carried by an endless chain. The trays have perforated surfaces (grates) above the bottom for supporting material, and air conduits below the grates with exit apertures for supplying cooling air. Compartments between the conduits and grates collect material that falls through the perforations. Diagrams show the construction and modifications of the trays, grates, and air conduits.
This document summarizes a patent application for improvements to cooling sintered and loose solid materials using an apparatus of overlapping trays carried by an endless chain. The trays have perforated surfaces for supporting material and conduits below for flowing a cooling gas. The conduits have lateral openings to allow gas to enter compartments below the perforated surfaces, where collected material can be cooled without falling through the tray bottoms. Diagrams show variations of the conduit and perforated surface configurations within the trays.
This document describes a spray booth patent from 1957. Key features include:
1) The spray booth uses exhausted ventilation air to pneumatically convey water droplets from the bottom basin to retainers in an exhaust duct above overflow devices, allowing the water to flow back by gravity.
2) This eliminates the need for a circulation pump and reduces clogging from paint in the water compared to pump circulation.
3) The spray booth operates by exhausting air through the operating chamber, which pulls water droplets up from the bottom basin to collectors above before exiting through the exhaust duct.
This document describes a patent for an improved electrical heater element. It consists of an outer tubular sheath filled with compacted insulation and containing longitudinally extending conductors connected to terminals protruding from one end of the sheath. A plug of heat-resistant resilient material is located in and gripped by the end of the sheath such that it protrudes and locates the terminals. The resistance wire is packed with insulating powder and the end with the rubber plug is swaged to tightly compress the plug and permanently hold it.
This document describes a 1957 patent for an oscillating column combustion apparatus. The apparatus has a combustion chamber and pulsating tube that form an acoustic resonator. It is an improvement over prior designs by introducing the combustion mixture tangentially into the cylindrical combustion chamber through a mixing tube. This causes the mixture to circulate and thermally prepare along the hot chamber walls before igniting, overcoming issues with deposits clogging inlet throats in previous models. The pulsating tube can be arranged coaxially to induce better vortexing for ignition.
This document describes a closure member for cistern overflow pipes that prevents air currents from entering the cistern. It consists of a housing with a vertically disposed inlet tube containing a buoyant cork ball closure member. When the liquid level in the cistern rises, the cork ball is displaced upwards, allowing overflow to pass through the outlet. When the level falls, the cork ball returns to its seating under gravity, blocking air flow into the cistern.
This document describes British patent GB784988(A) from 1957 regarding improvements to pressure-operated gas relay valves. Specifically, it introduces a weight supported by the valve-controlling diaphragm that is lifted off during valve closure by an adjustable stop, temporarily arresting closure to provide a steady gas flow to appliances like furnaces. It provides diagrams and descriptions of the valve components and how the added weight allows a third stage of gas flow control.
1) Researchers tested the effects of a new diffuser design and additional tail piece on the performance of an industrial axial-flow pump.
2) Computational fluid dynamics (CFD) analysis and laboratory experiments showed that with an 8-vane impeller, the new diffuser and tail piece improved pump efficiency by 3.9% compared to the original design.
3) However, with a 5-vane impeller, the original pump design performed better due to a mismatch between the impeller and diffuser vane angles with the new design.
This document describes a patent for an atomizing or spray container with a flexible side wall. It contains a tube inside the container with an adjustable air intake orifice. When the side walls are squeezed, both air and liquid are forced up the tube where they mix and are ejected through a spray outlet. The tube can be adjusted to control the mixture and produce different types of sprays. Various embodiments are illustrated with different configurations for the tube and adjusting the air orifice.
This document describes a patent for an atomizing or spray container with a flexible side wall. It contains a tube with an adjustable air intake orifice that allows air to mix with liquid inside the tube and be ejected through a spray outlet. Adjusting the air orifice controls whether a coarse spray, fine spray or liquid jet is produced. The tube can be installed in a cap or stopper closure in various adjustable or fixed configurations to allow for directional spraying and easy removal of the tube.
This patent document describes improvements to bolting means where one side of a joint is inaccessible during assembly. It involves using setscrews with eccentric heads that can be inserted into holes and rotated so the heads are trapped in grooves, preventing withdrawal from the holes. Nuts are then tightened on the setscrews to clamp parts together at the joint. The invention avoids using studs and reduces weight and manufacturing costs compared to prior bolting methods for inaccessible joints.
This document describes GB780189 (A), a 1957 patent for improvements to fuel injection systems in internal combustion engines. It aims to dispense with separate air compressors and fuel pumps by using a portion of compressed air in the cylinder to inject and atomize fuel. For four-stroke engines, sub-atmospheric pressure during the intake stroke draws fuel through a metering valve into the injector. For two-stroke engines, a low pressure pump forces fuel through the metering valve during the exhaust/transfer stroke. The timing of fuel injection is determined by an injector obstructing an opening to the combustion chamber at the end of the compression stroke.
This document provides a 3-sentence summary of GB784603 (A) which describes a fuel feeding apparatus for pressure burners. The apparatus includes a valve body with passages that selectively connect a mixture tube, air passage, and fuel passages. A stationary rubber disk member and rotatable disk valve member control the connections between passages for starting, running, and shutting off the burner. The valve members and passages allow the burner to be supplied with an air-fuel mixture for starting and then operated with vaporized liquid fuel from the fuel tank.
This document provides installation, operation, and maintenance instructions for barometric condensers. It describes the two main types of condensers and their basic parts. Installation guidelines include inspecting for damage, providing sufficient clearance and supports, and properly orienting piping. Operation involves starting condensing fluid flow before other equipment, regulating flow, and properly shutting down. Troubleshooting focuses on condensing fluid, spray devices, the tailpipe, and vapor inlet. Maintenance is recommended annually and includes inspecting and cleaning strainers and spray devices. Contact information is provided for ordering spare parts.
The document describes organopolysiloxane nitriles, which are novel compounds that can be used as intermediates to produce amide and acid substituted polysiloxanes. The organopolysiloxane nitriles have the general formula R'RNCCH(CH2)xSiO, where R' is a methyl or hydrogen, N has a value of 1 to 3, and R is a monovalent hydrocarbon radical without aliphatic unsaturation. The compounds can be prepared by reacting an unsaturated nitrile with a chlorosilane or by condensing a chloromethylalkoxysilane with an ethyl cyanoacetate. Co-polymers of the silox
This document describes a flea-repelling collar for dogs consisting of a loosely woven fabric tube filled with powder containing 1% lindane, which is effective at killing or repelling fleas. The tube has a ring attached at one end and string ties at the other end to secure the collar around the dog's neck. The collar is produced by filling the fabric tube with the powder under pressure, then attaching the ring and string ties to create a disposable product that repels fleas for 3-7 weeks.
This patent document describes improvements to ribbon type gas burners that provide multiple flames. It discloses a burner design with reinforced ribs that eliminates sagging even at high temperatures. The burner includes an integral crossover pilot at an asymmetric midpoint that ensures flame propagation between ports. By alternating burner orientation in an oven, localized overheating from crossover pilots is avoided while using a single burner design.
This document describes a patent application for a device to control back pressure in hydraulic systems. The device includes a pressure sensitive member extending into the supply and discharge conduits, with a valve element on one end to engage a valve seat in the discharge conduit. This maintains the back pressure in the discharge conduit at a predetermined ratio to the pressure in the supply conduit, such as 1/16, to prevent cavitation and noise. The device controls high velocity fluid flows when the control valve is moved, regulating pressure drops that could otherwise cause issues.
This document provides a detailed description of GB786044 (A), a patent for an electrical calculating apparatus. It includes 10 figures illustrating components of the apparatus such as a rotatable signal storage disc, magnetic signal heads, and circuits. The apparatus allows for the storage and transfer of numerical values between tracks on the disc through the magnetic heads to perform calculations in multiple cycles, with each cycle representing a digit being read by a different head. The patent provides examples of how different numerical problems, such as additions and subtractions, would be computed using the components of the described apparatus over successive phases.
This document describes a patent for a composite refractory rail used in pusher-type furnaces. The rail is made of multiple sections with each section composed of a material suited to withstand the stresses of its corresponding temperature zone in the furnace. This eliminates the need for water cooling inside the furnace. Preferably there are three sections: steel up to 600°C, silicon carbide from 600°C to 900°C, and fused metal oxides above 900°C. The rail allows withstanding high temperatures and fluctuations without losses from water cooling.
This document summarizes two British patent applications from 1957:
1. GB786219 (A) describes improvements to a grinding mill that uses arcuate channels and grids to convey material between grinding chambers to improve efficiency.
2. GB786220 (A) relates to the manufacture of electric cables with conductors surrounded by a fibrous dielectric like paper, impregnated with insulating oil. The invention pertains to improvements in manufacturing these "impregnated paper insulated cables."
This document describes a new high-speed steel alloy composition that provides both longer tool life and easier machining compared to prior alloys. The alloy contains carbon, silicon, manganese, sulfur, phosphorus, chromium, vanadium, tungsten, molybdenum, and optionally cobalt. Specific compositions within the ranges provided are shown to have unexpectedly longer tool life and easier finishing without sacrificing hardness or toughness needed for high-speed tool applications.
This document describes improvements to slurry basins and methods of forming homogeneous slurries. It relates to a slurry basin, which is a tank used to temporarily store a slurry, or suspension of solid particles in a liquid. The improvements allow for a homogeneous slurry to be formed from an incoming slurry of varying composition by mixing the contents of the basin and maintaining the slurry in a homogeneous state. The described improvements are particularly applicable to large slurry basins used in industries like cement production.
This document describes a patent for improvements relating to polymers and their uses. Specifically, it describes solid polyvinyl acetals of linear polymeric alcohols that have intralinear vinyl alcohol groups and extralinear vinylidene groups in a conjugated double bond system. It also describes polymerizable compositions containing such a polyacetal and an initiator that can be activated by actinic light.
This document describes GB785994 (A), a British patent filed on July 22, 1955 regarding an improved fluid coking process. The key aspect of the process is maintaining entrained solids from the fluidized coking bed in amounts above 400 lbs/bbl in the vapors above the bed to prevent coke deposition and fouling in the overhead system of the coking reactor. The fluid coking process involves contacting hydrocarbon oil with particulate solids at high temperature in a fluidized bed reactor to produce lighter hydrocarbon vapors while depositing carbon on the solid particles.
This document describes improvements to hammer-operated tools like punches and chisels. It discloses a tool with a gripping portion and an impact member made of hardened steel that is fitted into the gripping portion. This protects the tool from spreading or deforming under repeated hammer blows. It also describes a tube expander tool made from hexagonal tubing with one end shaped for gripping and the other fitted with an impact member of hardened steel.
This document describes British patent GB786204 (A) for an improved construction of a reinforced concrete beam. The beam has an inverted T-section with a horizontal bottom part of concrete containing longitudinal reinforcing members. A undulating reinforcing member connects the bottom and top members to provide a triangulated truss structure, imparting strength while maintaining lightness of weight. Edge portions of the bottom concrete part provide supporting ledges for flooring slabs.
The document describes a patent application for improvements relating to incorporating solid materials into oil. Specifically, it has been found that superior results in preventing caking of fertilizer materials can be achieved by spraying fertilizer granules with a dilute aqueous solution of an alkali metal lauryl sulfate compared to other surface active agents. The process involves spraying phosphorus-containing fertilizer granules with a solution of alkali metal lauryl sulfate, preferably sodium lauryl sulfate, to prevent caking upon storage.
1) Researchers tested the effects of a new diffuser design and additional tail piece on the performance of an industrial axial-flow pump.
2) Computational fluid dynamics (CFD) analysis and laboratory experiments showed that with an 8-vane impeller, the new diffuser and tail piece improved pump efficiency by 3.9% compared to the original design.
3) However, with a 5-vane impeller, the original pump design performed better due to a mismatch between the impeller and diffuser vane angles with the new design.
This document describes a patent for an atomizing or spray container with a flexible side wall. It contains a tube inside the container with an adjustable air intake orifice. When the side walls are squeezed, both air and liquid are forced up the tube where they mix and are ejected through a spray outlet. The tube can be adjusted to control the mixture and produce different types of sprays. Various embodiments are illustrated with different configurations for the tube and adjusting the air orifice.
This document describes a patent for an atomizing or spray container with a flexible side wall. It contains a tube with an adjustable air intake orifice that allows air to mix with liquid inside the tube and be ejected through a spray outlet. Adjusting the air orifice controls whether a coarse spray, fine spray or liquid jet is produced. The tube can be installed in a cap or stopper closure in various adjustable or fixed configurations to allow for directional spraying and easy removal of the tube.
This patent document describes improvements to bolting means where one side of a joint is inaccessible during assembly. It involves using setscrews with eccentric heads that can be inserted into holes and rotated so the heads are trapped in grooves, preventing withdrawal from the holes. Nuts are then tightened on the setscrews to clamp parts together at the joint. The invention avoids using studs and reduces weight and manufacturing costs compared to prior bolting methods for inaccessible joints.
This document describes GB780189 (A), a 1957 patent for improvements to fuel injection systems in internal combustion engines. It aims to dispense with separate air compressors and fuel pumps by using a portion of compressed air in the cylinder to inject and atomize fuel. For four-stroke engines, sub-atmospheric pressure during the intake stroke draws fuel through a metering valve into the injector. For two-stroke engines, a low pressure pump forces fuel through the metering valve during the exhaust/transfer stroke. The timing of fuel injection is determined by an injector obstructing an opening to the combustion chamber at the end of the compression stroke.
This document provides a 3-sentence summary of GB784603 (A) which describes a fuel feeding apparatus for pressure burners. The apparatus includes a valve body with passages that selectively connect a mixture tube, air passage, and fuel passages. A stationary rubber disk member and rotatable disk valve member control the connections between passages for starting, running, and shutting off the burner. The valve members and passages allow the burner to be supplied with an air-fuel mixture for starting and then operated with vaporized liquid fuel from the fuel tank.
This document provides installation, operation, and maintenance instructions for barometric condensers. It describes the two main types of condensers and their basic parts. Installation guidelines include inspecting for damage, providing sufficient clearance and supports, and properly orienting piping. Operation involves starting condensing fluid flow before other equipment, regulating flow, and properly shutting down. Troubleshooting focuses on condensing fluid, spray devices, the tailpipe, and vapor inlet. Maintenance is recommended annually and includes inspecting and cleaning strainers and spray devices. Contact information is provided for ordering spare parts.
The document describes organopolysiloxane nitriles, which are novel compounds that can be used as intermediates to produce amide and acid substituted polysiloxanes. The organopolysiloxane nitriles have the general formula R'RNCCH(CH2)xSiO, where R' is a methyl or hydrogen, N has a value of 1 to 3, and R is a monovalent hydrocarbon radical without aliphatic unsaturation. The compounds can be prepared by reacting an unsaturated nitrile with a chlorosilane or by condensing a chloromethylalkoxysilane with an ethyl cyanoacetate. Co-polymers of the silox
This document describes a flea-repelling collar for dogs consisting of a loosely woven fabric tube filled with powder containing 1% lindane, which is effective at killing or repelling fleas. The tube has a ring attached at one end and string ties at the other end to secure the collar around the dog's neck. The collar is produced by filling the fabric tube with the powder under pressure, then attaching the ring and string ties to create a disposable product that repels fleas for 3-7 weeks.
This patent document describes improvements to ribbon type gas burners that provide multiple flames. It discloses a burner design with reinforced ribs that eliminates sagging even at high temperatures. The burner includes an integral crossover pilot at an asymmetric midpoint that ensures flame propagation between ports. By alternating burner orientation in an oven, localized overheating from crossover pilots is avoided while using a single burner design.
This document describes a patent application for a device to control back pressure in hydraulic systems. The device includes a pressure sensitive member extending into the supply and discharge conduits, with a valve element on one end to engage a valve seat in the discharge conduit. This maintains the back pressure in the discharge conduit at a predetermined ratio to the pressure in the supply conduit, such as 1/16, to prevent cavitation and noise. The device controls high velocity fluid flows when the control valve is moved, regulating pressure drops that could otherwise cause issues.
This document provides a detailed description of GB786044 (A), a patent for an electrical calculating apparatus. It includes 10 figures illustrating components of the apparatus such as a rotatable signal storage disc, magnetic signal heads, and circuits. The apparatus allows for the storage and transfer of numerical values between tracks on the disc through the magnetic heads to perform calculations in multiple cycles, with each cycle representing a digit being read by a different head. The patent provides examples of how different numerical problems, such as additions and subtractions, would be computed using the components of the described apparatus over successive phases.
This document describes a patent for a composite refractory rail used in pusher-type furnaces. The rail is made of multiple sections with each section composed of a material suited to withstand the stresses of its corresponding temperature zone in the furnace. This eliminates the need for water cooling inside the furnace. Preferably there are three sections: steel up to 600°C, silicon carbide from 600°C to 900°C, and fused metal oxides above 900°C. The rail allows withstanding high temperatures and fluctuations without losses from water cooling.
This document summarizes two British patent applications from 1957:
1. GB786219 (A) describes improvements to a grinding mill that uses arcuate channels and grids to convey material between grinding chambers to improve efficiency.
2. GB786220 (A) relates to the manufacture of electric cables with conductors surrounded by a fibrous dielectric like paper, impregnated with insulating oil. The invention pertains to improvements in manufacturing these "impregnated paper insulated cables."
This document describes a new high-speed steel alloy composition that provides both longer tool life and easier machining compared to prior alloys. The alloy contains carbon, silicon, manganese, sulfur, phosphorus, chromium, vanadium, tungsten, molybdenum, and optionally cobalt. Specific compositions within the ranges provided are shown to have unexpectedly longer tool life and easier finishing without sacrificing hardness or toughness needed for high-speed tool applications.
This document describes improvements to slurry basins and methods of forming homogeneous slurries. It relates to a slurry basin, which is a tank used to temporarily store a slurry, or suspension of solid particles in a liquid. The improvements allow for a homogeneous slurry to be formed from an incoming slurry of varying composition by mixing the contents of the basin and maintaining the slurry in a homogeneous state. The described improvements are particularly applicable to large slurry basins used in industries like cement production.
This document describes a patent for improvements relating to polymers and their uses. Specifically, it describes solid polyvinyl acetals of linear polymeric alcohols that have intralinear vinyl alcohol groups and extralinear vinylidene groups in a conjugated double bond system. It also describes polymerizable compositions containing such a polyacetal and an initiator that can be activated by actinic light.
This document describes GB785994 (A), a British patent filed on July 22, 1955 regarding an improved fluid coking process. The key aspect of the process is maintaining entrained solids from the fluidized coking bed in amounts above 400 lbs/bbl in the vapors above the bed to prevent coke deposition and fouling in the overhead system of the coking reactor. The fluid coking process involves contacting hydrocarbon oil with particulate solids at high temperature in a fluidized bed reactor to produce lighter hydrocarbon vapors while depositing carbon on the solid particles.
This document describes improvements to hammer-operated tools like punches and chisels. It discloses a tool with a gripping portion and an impact member made of hardened steel that is fitted into the gripping portion. This protects the tool from spreading or deforming under repeated hammer blows. It also describes a tube expander tool made from hexagonal tubing with one end shaped for gripping and the other fitted with an impact member of hardened steel.
This document describes British patent GB786204 (A) for an improved construction of a reinforced concrete beam. The beam has an inverted T-section with a horizontal bottom part of concrete containing longitudinal reinforcing members. A undulating reinforcing member connects the bottom and top members to provide a triangulated truss structure, imparting strength while maintaining lightness of weight. Edge portions of the bottom concrete part provide supporting ledges for flooring slabs.
The document describes a patent application for improvements relating to incorporating solid materials into oil. Specifically, it has been found that superior results in preventing caking of fertilizer materials can be achieved by spraying fertilizer granules with a dilute aqueous solution of an alkali metal lauryl sulfate compared to other surface active agents. The process involves spraying phosphorus-containing fertilizer granules with a solution of alkali metal lauryl sulfate, preferably sodium lauryl sulfate, to prevent caking upon storage.
This document describes an automatic control device for an epicyclic gearbox. It consists of a pilot device controlled by a centrifugal governor mounted on the driving shaft. The pilot device controls a selector-distributor to direct pressurized fluid to actuating devices that select the gear trains. The pilot device is connected to the selector by three unidirectional servomotors, with two providing step-wise selection and a third allowing rapid downshifting over multiple steps. This allows both gradual and quick gear changes to suit driving conditions.
This document describes British patent GB780157 for improvements to liquid pumps, particularly for use as fuel injectors in vehicle engines. The pump uses a venturi section with an oscillating diaphragm to create intermittent suction that draws liquid through a intake conduit and expels it through a discharge conduit, transferring the liquid against a low pressure head. The oscillating diaphragm is driven electrically but could also be driven mechanically, hydraulically, or pneumatically. The pump is suitable for uses where small quantities of liquid need to be delivered reliably, such as maintaining fuel pressure in a carburetor located above the vehicle's fuel tank.
This document summarizes a patent for improvements in apparatus for producing tar macadam. The apparatus can be easily dismantled and transported in two parts on trailers. It includes a drier, hot elevator, screen, bins, weighing apparatus and mixer. The hot elevator pivots to lie horizontally during transport. The screen and lower parts detach and lower onto separate trailers for transport. At the new site, the process is reversed to reassemble the apparatus.
This document describes an improvement to corner fittings used in constructing sheet metal boxes. The corner fittings have angled flanges that allow adjacent sides of the box to be joined together at right angles. Lugs project inwardly from the flanges to reinforce the joints. When the sides are folded and the lugs bent inward, rigid box corners are formed without additional fasteners. The corner fittings allow for quick and easy assembly of rigid sheet metal boxes.
This patent describes a floor cleaning machine with an improved wiping device. The wiping device uses a front flap and rear flap to define a suction chamber for removing dirty cleaning liquid from the floor. The front flap can be provided with indentations of varying sizes to control the suction pressure and noise level. Notably, at least a portion of the front flap is in the form of a removable tab. This allows the user to selectively remove the tab to form a larger opening, reducing suction noise for sensitive environments while maintaining high suction capability with the smaller openings.
This document describes a floor cleaning machine that has a brush to scrub floors with cleaning liquid and a wiping device to scrape floors and remove dirty liquid. The wiping device has a front and rear flap that suction up liquid into a chamber connected to suction means. The front flap has indentations to convey liquid into the chamber. It also has a removable tab portion that can be removed to form a broader passageway, reducing suction noise. The invention provides a versatile front flap that can be used to favor suction capacity or reduced noise based on user needs.
1) The document describes improvements in automatic rammer mechanisms for guns.
2) It aims to provide a fully automatic rammer that uses free-flight delivery of ammunition into the gun breech to minimize the time between rounds and protect the ramming mechanism from damage from premature breech closure.
3) Free-flight delivery also allows more accurate insertion of rounds into the breech under varying conditions like pitch and roll of the gun.
This document describes improvements to magnetic separators and radial flow compressors. It discusses magnetic separator filter elements with slots and walls extending perpendicular from the slots. It also discusses a method of manufacturing radial flow compressors with different characteristics by using interchangeable rotor and insertion sets, including open and closed rotor types.
This document describes two British patents from 1957:
1) GB784929(A) describes aircraft doors for a bomb bay that open by sliding up the outside of the aircraft rather than swinging downward to reduce drag.
2) GB784930(A) describes a movable platform in an aircraft bomb bay that can lower a bomb/missile below the bay opening while largely closing the opening to further reduce drag when bombing. The platform is operated by lever arms connected to jacks.
This document describes an apparatus for extracting air from fiber suspensions used in papermaking. It discusses how air in fiber suspensions can cause issues in paper quality and discusses prior methods for air extraction. The invention aims to improve prior methods by including a vacuum chamber and means for vibrating the fiber suspension within the chamber to facilitate separation of air bubbles from the fibers. It provides various examples of configurations for the vibrating means and discusses how the invention allows for highly effective air removal from fiber suspensions.
This document describes a patent for a method of conditioning web-like materials in a closed chamber using a gaseous medium containing water vapor. The method involves dividing the conditioning process into separate treatment steps where the material is cooled between steps. The relative humidity is successively increased in each step. This allows for more even moisture distribution compared to previous single-step methods. Diagrams and figures show the multi-step apparatus used to perform this conditioning process.
This document describes a mounting arrangement for an axial flow fan. It discloses a fan mounting that includes a plurality of curved arms to mount the fan to a structure defining a circular passage. The mounting arrangement is designed to improve acoustic noise performance and minimize packaging while maintaining efficiency. The document provides details of the fan design, including its hub, blades, and electric motor connection. It also references other prior art fan mounting arrangements.
This document describes British patent GB785774 filed in 1957. It relates to an improved means of detachably attaching two parts together using a U-shaped strap with parallel slits that cooperate with pins, screws or the like on the other part. The strap can detachably attach objects like a car radio to a vehicle's instrument panel in a cheap and practical manner.
(1) The document is a patent that describes a filter cartridge for a vacuum cleaner.
(2) It includes a cylindrical sidewall with an inwardly facing flange and at least one cross-beam extending along a diameter of the opening at the bottom. A radially pleated filter element is provided.
(3) The filter cartridge can be used with a dirt container having a tangential air inlet at the upper portion, a closed top, and a central outlet at the bottom to improve air separation and dirt collection.
This document summarizes British patent GB785929 (A) which relates to improvements in fabric tentering and drying machines. Specifically, it describes a machine that has upper and lower nozzle boxes for blowing heated air onto a fabric web to dry it. The machine features filters with automatic cleaning means to remove dust and fibers. It also allows the upper nozzle box and nozzles to be hinged upward along with a lid, providing easy access for examination, repairs and cleaning of the machine parts.
This document describes improvements to control means for electric current converters. It discusses providing control of discharge paths through respective control electrodes over a wide range, from rectifier to inverter operation. Each control electrode is connected to two inductive members (transformers or chokes) supplied with phase-displaced operating currents/voltages from AC busbars. There are means for imparting a commonly variable direct current premagnetization and means for imparting independently pre-settable direct current premagnetizations, allowing control of each electrode's feed to provide a control voltage during a portion of the converter's total control range.
This document provides installation requirements for flexible ducts. It discusses code references, installation restrictions, general installation guidelines, duct sizing and routing, supporting flexible ducts, and connecting, joining and splicing flexible ducts. Some key points include:
- Flexible ducts must be installed according to applicable NFPA codes and within the limitations of their listing.
- Ducts must have a minimum 1 duct diameter bend radius and be properly supported to prevent sagging. Excess duct length should not be used.
- Ducts must be sized properly taking into account friction losses from bends, fittings and compression. Equivalent lengths are used to account for these losses in sizing calculations.
- Flexible duct
Inventors and entrepreneurs have vocations fueled by passion. Many would have done it for free or as a hobby if it hadn’t become a profession. Mark Rosenzweig is a natural creator, driven by his passion. This fuel has led Mark to develop his ideas into viable products and innovations that he has been patenting since 2003. From an innovative filter sensor and indicator for vacuum cleaners to a basket for deep fryer and methods of cooking food products to a compact cyclonic bagless vacuum cleaner. Sometimes independently and often as part of creative teams, Mark has patented just under one hundred innovative inventions between 2003 and 2017.
The patent describes a variable displacement screw-type compressor. It has at least one main rotor and one subsidiary rotor housed together that convey a medium from an inlet to an outlet. At least one housing segment fitted to slide transversely to the rotor axes defines the inlet. This allows the inlet channel length and thus the compression ratio and feed rate to be adjusted, improving efficiency over prior designs. The housing segments are guided in wells of the housing and each has a length corresponding to the axial distance between tooth contact points for a discrete adjustment corresponding to the rotor graduations.
Design and Construction of an Installation for Testing Bubble Generators Used...AJASTJournal
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риваются методы расчета необходимой и достаточной точности гео
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1. * GB786179 (A)
Description: GB786179 (A) ? 1957-11-13
Improvements in or relating to suction cleaning nozzles
Description of GB786179 (A)
A high quality text as facsimile in your desired language may be available
amongst the following family members:
NL87720 (C)
NL87720 (C) less
Translate this text into Tooltip
[79][(1)__Select language]
Translate this text into
The EPO does not accept any responsibility for the accuracy of data
and information originating from other authorities than the EPO; in
particular, the EPO does not guarantee that they are complete,
up-to-date or fit for specific purposes.
PATENT SPECIFICATION
7 86,179 Date of Application and filing Complete Specification: Nov 8,
1955.
No 31843/55.
Application made in Sweden on Nov 8, 1954.
t D Complete Specification Published: Nov 13, 1957.
Index at Acceptance:-Ciass 107, G( 1 B: 3).
International Classification:-E O lh.
COMPLETE SPECIFICATION
Improvements in or relating to suction cleaning nozzles We,
AKTIEBOLAGET ASBRINK & Co, a company duly organized and existing under
the laws of Sweden, of On, Limhamn, Sweden, do hereby declare the
invention, for which we pray that a patent may be granted to us, and
the method by which it is to be performed, to be particularly
described in and by the following statement: This invention relates to
suction cleaning nozzles especially for the cleaning of streets and
2. the like.
It has long been imagined that it should be possible to perform the
cleaning of streets with a cleaning machine operating mainly on the
same principle as a vacuum cleaner with suction nozzle, with the
difference, however, that the unit is enlarged and mounted on a
vehicle, e g a motor vehicle, so that the suction nozzle may be moved
by the vehicle over the street surface at a short distance therefrom,
said suction nozzle having a sufficiently large working width and a
sufficiently large nozzle aperture as well as sucking action to suck
up litter dust and the like (hereinafter referred to as litter ") from
the street surface and convey them by the flowing suction air to a
container on the vehicle where they are separated from the air and
collected, the container being emptied from time to time.
Of the many suggestions already made in this direction, some also are
to the effect that the suction air can be caused to circulate by
putting it under pressure, after the litter has been separated
therefrom, and blowing it out through a blowing air nozzle surrounding
the suction nozzle in order that the blowing air discharged through
said blowing air nozzle may loosen up and carry along the litter and
be sucked up again through the suction nozzle The many proposals
hitherto made to reduce these prior suggestions to practice in a
street cleaning machine of satisfactory function lPrimp have failed
because of the many technical difficulties met with in this
connection.
Only lately and with the aid of several new inventions including the
present invention it has been found possible to overcome the technical
difficulties to such an extent that the possibility of realizing the
old suggestions in practice, with the results aimed at, has come
within reach.
The object of the present invention is to provide an improved suction
cleaning nozzle overcoming one of the many difficulties encountered
This difficulty manifests itself in a strong tendency of the litter
which is sucked up from the street surface through the suction nozzle
and is conveyed by the suction air stream through a conduit to the
container for separation and collection, to adhere and collect on the
inside of the suction nozzle and the suction conduit, whereby these
parts will soon be clogged.
Further objects of the invention and advantages gained thereby will
become apparent from the following description, reference being had to
the accompanying drawing, in which Fig 1 is a diagrammatic view
illustrating how the present invention is applied to a suction and
blowing nozzle unit which forms the subject matter of a co-pending
Application No 31844/55 (Serial No 786,180) and which has proved to
operate with satisfactory results in practice when improved by the
3. means of the present invention for effectively obviating the clogging
of the suction nozzle and suction conduit, which would otherwise occur
very rapidly.
Fig 2 is a vertical cross section on a larger scale through the nozzle
arrangement.
Fig 3 is a plan view as seen from below of the nozzle arrangement on a
smaller scale.
Figs 4 and 5 are detail sections.
In the nozzle arrangement illustrated the suction nozzle 1, as seen
from below, provides an orifice in the form of an elongated pf,.
straight slot, and at a distance outwardly from said slot there
extends a blowing air nozzle 2 which, as seen from below, provides an
orifice in the form of an annular slot surrounding the suction nozzle
1 The orifices of the suction and blowing nozzles lie approximately in
the same horizontal plane, and above said plane they leave between
each other an annular chamber 3 which is open downwardly and has
outwardly inclined side walls 4 and 5 The side wall 4 adjacent to the
suction nozzle 1 merges at its lower end with a smoothly curved
portion 6 (Fig 5) in the suction nozzle wall, and the outer side wall
5 of the chamber 3 constitutes at the same time the inner wall of the
annular blowing nozzle 2.
In the transition between the suction nozzle wall and the wall 4 there
are spaced water ejecting openings 7 (Fig 5) leading from a
distributing chamber 8 provided around the lower end of the suction
nozzle 1 and connected by means of a conduit 9 to a source of water
under pressure which, in the form shown, is a water tank 10 mounted on
the vehicle and a pump 11 (Fig 1) in the conduit 9 from said tank Said
conduit 9 branches off also to manifolds 12 which are disposed at the
top of chamber 3 in front of and behind the suction nozzle 1 and which
are provided with suitably distributed water ejecting openings 13
(Figs 2-4) directed towards the wall 4.
It has been established that the supply of water through the water
ejecting openings 7 and 13 is an efficient means for preventing the
litter sucked up from the street surface from adhering and collecting
in the suction nozzle and the suction conduit leading from said nozzle
to the container (not shown) on the vehicle for separating and
collecting the litter The invention must not, however, be regarded as
restricted to just that location of the water ejecting openings, which
is illustrated by way of example on the drawing It is essential for
the location of the water ejecting openings, however, that it be
selected in such a way that under the action of the blowing and
suction air the ejected water spreads as a film on, and sweeps over,
the insides of the suction nozzle and the conduit leading from said
nozzle to the container for separating and collecting the litter It is
4. advantageous, though not absolutely necessary, that also that portion
of the bounding surface of the chamber 3 which lies adjacent the
suction nozzle and smoothly merges in the inside of said nozzle, is
swept by such a water film, which is realized in the form shown and
described thanks to the described arrangement of the water ejecting
openings 13 It should be observed that neither the water ejecting
openings 7 nor the water ejecting openings 13 have the task of
moistening the street surface either before or during the cleaning of
said surface by the blowing and suction air.
Ahead of the pump 11 in the conduit 9 there may preferably be inserted
a filter 14 (Fig 1), and in the conduit 9 there may preferably also be
interposed a water heater (Fig 1) in which the water supplied to the
water ejecting openings 7 and 13 can be heated, e g by hot exhaust
gases, to prevent ice formation in the suction nozzle during cold
weather By recirculating water, which has been heated in the water
heater 15, through the tank 10, ice formation may be prevented also in
said tank and in the conduit leading therefrom.
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* Legal notice
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* Last updated: 08.04.2015
* Worldwide Database
* 5.8.23.4; 93p
* GB786180 (A)
Description: GB786180 (A) ? 1957-11-13
Improvements in or relating to suction and blowing nozzle units for street
cleaning
Description of GB786180 (A)
A high quality text as facsimile in your desired language may be available
amongst the following family members:
DE1113227 (B) NL89777 (C)
DE1113227 (B) NL89777 (C) less
5. Translate this text into Tooltip
[81][(1)__Select language]
Translate this text into
The EPO does not accept any responsibility for the accuracy of data
and information originating from other authorities than the EPO; in
particular, the EPO does not guarantee that they are complete,
up-to-date or fit for specific purposes.
PATENT SPECIFICATION
Date of Application and filing Complete Specification: Nov 8, 1955.
786,180 No 31844/55.
2 i Application made in Sweden on Dec10, 1954.
Complete Specification Published: Nov 13, 1957.
Index at acceptance:-Class 107, C( 1 B:3).
International Classification:-E 01 h.
COMPLETE SPECIFICATION
Improvements in or relating to Suction and Blowing Nozzle Units for
Street Cleaning We, AKTIEBOLAGET ASBRINK & Co, a company duly
organized and existing under the laws of Sweden, of On, Limhamn,
Sweden, do hereby declare the invention, for which we pray that a
patent may be granted to us and the method by which it is to be
performed, to be particularly described in and by the following
statement:-
This invention relates to a suction and blowing nozzle unit for street
cleaning and similar uses.
We have described and claimed in our copending British Application No
31843/55 (Serial No 786,179) a similar arrangement to that hereinafter
described and claimed and we do not herein claim any device identical
to that described in our aforeclaimed application.
The invention has for its object to provide an improved suction and
blowing nozzle unit for machines for cleaning streets and the like by
means of blowing and suction air and will be fully described in the
following with reference to the accompanying drawing in which: Fig 1
is a diagrammatic vertical longitudinal section of the nozzle unit,
illustrating how it should preferably be connected in a circuit for
circulating the cleaning air and for separating the dust, dirt and the
like sucked up by said air; Figs 2 and 3 are vertical longitudinal
section and a plan view, respectively, of the nozzle unit on a larger
scale; Fig 4 is a vertical cross section of the nozzle unit:
Fig 5 is a view of part of the nozzle unit shown in Fig 4 on a still
larger scale.
In the drawing 1 is the suction nozzle, the downwardly facing orifice
6. of which is in the form of a long slot, whose longitudinal direction
extends at right angles to the longitudinal direction of a vehicle
(not shown) carrying the nozzle unit and serving to move said unit
over the street surface to be cleaned.
The suction nozzle 1 is surrounded by the annular blowing nozzle 2
whose orifice is approximately coplanar with the suction nozzle
orifice and is in the form of a slot spaced a distance from the
suction nozzle 50 and directing the ejected blowing air in the form of
a veil obliquely downwardly towards the vertical projection of the
suction nozzle orifice or its longitudinal axis on the street surface
The blowing nozzle slot preferably 55 has two straight portions
disposed ahead of and behind the suction nozzle, respectively.
Said straight portions are of approximately the same length as the
long suction nozzle orifice and parallel thereto, and two semi 60
circular portions unite said straight portions with one another, the
centres of said semicircular portions being situated at the ends of
the long suction nozzle orifice On the entire or greater part of the
length of the 65 straight portions the blowing nozzle slot is
preferably somewhat wider than in its other parts The total area of
the orifice of the blowing nozzle may preferably be half that of the
orifice of the suction nozzle The 70 blowing nozzle is connected to
the pressure side of a centrifugal fan 3 of high capacity, while the
suction nozzle 1 is connected to the suction side of said fan through
a cyclone apparatus 4 for separating the sucked-up 75 dust, dirt and
the like from the suction air.
A problem to the solution of which the invention contributes is to
restrict the air sucked in through the suction nozzle 1, as far as
possible to the air which is blown out go through the blowing nozzle
2, i e, to reduce as far as possible the quantity of excess air which
tries to find its way to the sucti Qn nozzle from outside This is
desirable for the reason that such excess air has to be re 85 moved
from the circuit through an outlet 5 on the pressure side of the fan
and to be cleaned from dust in a dust separator before allowing it to
escape into the open air The separation of dust from the excess air
escap 90 786,180 ing into the open air cannot be realized sufficiently
effectively in the separator 4 through which the total amount of
suction air passes for separating the sucked-up dust, dirt and the
like, without it being necessary to give said separator dimensions
which are unreasonable for practical use In order that the dimensions
of the dust separator may be kept reasonable, only a small fraction of
the amount of air sucked up through the suction nozzle should pass
through said dust separator To obviate that dust is spread in the
surrounding atmosphere it is therefore important on one hand that the
excess air sucked up is small and on the other that the blowing air
7. rejected through the blowing nozzle 2 is always sucked in again
through the suction nozzle 1 This being the case, dust and fine sand
grains in the blowing air are useful rather than inconvenient inasmuch
as they increase the blast action of the blowing air, i e, its
cleaning effect on the street surface.
Another problem which to a certain extent is associated with the
problem described above and to the solution of which the invention
also makes an essential contribution, depends from the suction action
of the suction nozzle decreasing very rapidly as the distance of the
suction nozzle orifice to the surface to be cleaned increases For this
reason it is advantageous, to move the nozzle unit with the suction
and blowing nozzle orifices at the shortest possible distance over the
street surface, but because of the irregularities of said surface the
distance cannot be held as short as would otherwise be desirable.
The suction nozzle 1 must not be able to suck air from above through
the annular space between said nozzle and the blowing nozzle 2
surrounding it, and according to the invention the wall of this
upwardly closed and downwardly open annular space 6, as seen in cross
section, arches upwardly over and between the suction and blowing
nozzle orifices The space 6 is preferably of such a shape that it may
be described as bounded by two outwardly inclined walls, an inner wall
7 and an outer wall 8, the inner wall 7 being more inclined outwardly
than is the outer wall 8, and merging at the top in said wall 8 with a
smoothly curved portion 9 (Fig.
5) The outer wall 8 of the annular space 6 is preferably formed by the
inner wall of the annular blowing nozzle 2.
Under the action of the blowing and suction air streams a strong air
vortex is produced in and below the annular space 6 which, as seen in
cross section, arches up 60 wardly over and between the suction and
blowing orifices It may be said that this vortex acts as an artificial
downward extension of the suction nozzle As a result thereof the
sucking action of said nozzle increases 65 very much as does the rate
of flow of the air adjacent the street surface being cleaned, whereby
the sweeping effect is improved and it is ensured that all blowing air
is sucked up again through the suction nozzle and that 70 the
undesirable excess air is kept small.
Subject to the foregoing disclaimer what
* Sitemap
* Accessibility
* Legal notice
* Terms of use
* Last updated: 08.04.2015
* Worldwide Database
8. * 5.8.23.4; 93p
* GB786181 (A)
Description: GB786181 (A) ? 1957-11-13
A method for building a shelter roof construction and shelter roof
construction built according to this method
Description of GB786181 (A)
PATENT SPECIFICXTION
786,181 Date of Application and filing Complete
Specification: Dec 5, /955 No 34739/
Complete Specification Published: Nov 13, 1957.
Index at acceptance:-Class 20 ( 4), N( 5:10).
International Classification:-E 04 b.
COMPLETE SPECIFICATION
A Method for Building a Shelter Roof Construction and Shelter Roof
Construction Built According to This Method 55.
I, WILLEM PIETER LUBBERS, a Dutch Subject, of Arabislaan 39, The
Hague, Holland, do hereby declare the invention for which I pray that
a patent may be granted to me and the method by which it is to be
performed, to be particularly described in and by the following
statement: -
This invention relates to a method for building a shelter roof
construction comprising rafters secured at one end to the ground or a
foundation, a roof of sheet material being fixed to these rafters,
this roof being reinforced by purlins and having in crosssection
substantially the shape of a semiparabola, and to a shelter roof
construction built according to this method Such a shelter roof
construction is described and illustrated in my Specifications Nos
34738/55 and
34741/55 (Serial Nos 776,736 and 786,183) and may be used as an
automobile garage, station roof, hangar, market-hall, bicycleshed,
farm barn and for other purposes, this shelter roof construction
preventing rain or snow penetrating into the space under the shelter
roof notwithstanding the fact that the latter is open at the front.
The invention aims at building such a shelter roof construction
9. rapidly and economically from pre-fabricated roof elements and rafters
This is achieved by the method according to the present invention in
that sheets are manufactured from thin sheet material, these sheets
having a length equal to the length of the cross-section of the roof
and a width substantially equal to the distance between two rafters,
the purlins being fastened to these sheets, the latter being further
provided with fastening means for being fastened to the rafters After
having been manufactured in the works such sheets may be rolled-up and
sent to the building site in rolled-up condition In this way they
require little space and are easy to handle.
When during the construction of such a shelter roof construction two
rafters have been lPrice 3/61 erected by a labour gang, a second
labour gang may be used for fastening the sheet to these rafters The
first labour gang may then erect the following rafter whilst the
second gang may, every time a next rafter 50 has been erected, mount a
roof sheet between this rafter and the preceding one.
According to a feature of the invention the purlins may be easily
fastened to the rafters when on both sides of the rafters, 55
substantially at the point where the purlins will be arranged, short
pieces of angle iron are provided.
To these short pieces of angle iron the purlins may be directly
secured According 60 to a further feature of the invention each two
abutting purlins on adjacent sheets may be connected to each other by
means of a profile iron which sufficiently overlaps the end portions
of the two adjacent purlins 65 In this manner the shelter-roof
construction is considerably strengthened.
A preferred embodiment according to the present invention is
characterized in that the lower beam of each rafter consists of
U-iron, 70 to which the angle irons are secured in such a manner that
the legs of the U-iron project beyond these angle irons, the edges of
the sheets being bent upwards between the rafters into the space of
this U-iron Due to 75 the fact that the end portions of the sheets are
clamped against the legs of the U-shaped lower rafter beam a sealing
is obtained, and, as the edges of the sheets are bent upwards, any
water penetrating between this sealing is 80 prevented from dripping
down the shelterroof construction.
Yet another feature of the invention relates to a pre-fabricated
rafter, which is characterized in that its' lower beam is provided 85
at both sides with spaced angle irons welded thereto.
It is preferred to construct the rafters and the sheets in such a
manner that exclusively bolts may be used as fastening means Con-90
786,181 sequently welding and riveting on the building site is
entirely avoided, whilst, moreover, the shelter-roof construction is
dismountable.
10. The invention will be described below with reference to the drawing
showing by way of example two embodiments of the shelter-roof
construction according to the invention.
Fig 1 shows this shelter-roof construction diagrammatically and in
perspective; Fig 2 is a section according to the line II-II of Fig 1,
Fig 3 shows a top plan view of part of a sheet, Fig 4 shows a section
of the front portion of a second embodiment of the shelter roof
construction according to the present invention.
As is apparent from Fig 1, the shelterroof construction comprises a
number of rafters 1, secured, in spaced relation to each other, by
their lower ends, to a foundation 2, and with their other ends
projecting freely towards the front A roof 3 of metal sheet is secured
to the under side of these rafters 1, the said roof being provided
with spaced purlins 4 extending in the longitudinal direction of the
shelter-roof construction.
The lower edge 5 of this roof 3 extends at a distance from the
foundation 2 Due to the fact that this shelter-roof construction is
open both at the front and at the sides, the space below the
shelter-roof is easily accessible.
In Fig 2 the lower beam of a rafter 1 consists of a reversed U-iron To
both sides of this beam 6 an angle iron 7 and 8 respectively has been
fixed at the point of each purlin 4, for example by welding These
angle irons have only a small length, for example mm, and are fixed to
the U-shaped beam 6 in such a manner that their leg which is not fixed
to these U-beams 6 is positioned slightly higher than the lower edge
of the U-beams 6.
In the legs of these short angle irons 7 and 8 respectively which are
not connected to the U-beams 6, holes 9 are provided, in which bolts
10 are inserted, passing through the sheet-like roof 3, a washer 11
and a purlin 4 When the nuts 12 are tightened the purlins 4 are
pressed firmly against the angle irons 7 and 8, the washers 11
providing for -a free space between the roof 3 and the purlins 4, so
that water of condensation may flow downwards along the roof 3.
The sheets of the roof 3 are firmly pressed by the washers 11 against
the under sides of the legs of the lower beam of U-shaped crosssection
The ends of the sheets projecting into this beam are bent upwards, so
that no rainwater, which might leak through the sealing thus obtained,
may drip down the shelterroof construction.
As may be seen from Fig 3 each sheet 13 comprises a number of narrow
portions 14 connected with their edges to one another, these portions
14 having a width dependent on the material available in the trade The
length of each of these portions 70 must correspond to the distance
between adjacent rafters To the sheets 13 thus formed purlins 4 are
welded, having a length which is approximately equal to the distance
11. between two rafters 1 The total length of 75 the sheets 13 thus formed
corresponds with the length of the cross-section of the shelterroof
construction, so that it is possible to lay the entire roof portion
between two successive rafters 1 by means of one sheet 13 onlh 80 As
is apparent from Fig 4, the ends of each two abutting purlins 4 on
adjacent sheets 13 may be connected to one another by means of a
profile iron 15, for example an angle iron This profile iron 15
overlaps 85 both end portions of the said purlins over such a distance
that a firm construction is obtained.
It is obvious that the invention is not restricted to the embodiments
described above 90 by way of example and shown in the drawings, but
that these may be modified in many ways without departing from the
scope of the invention as set out in the appended claims 95
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* GB786182 (A)
Description: GB786182 (A) ? 1957-11-13
Improvements in a shelter roof construction
Description of GB786182 (A)
PATENT SPECIFICATION
Date of Application and filing Complete Specification: Dec 5, 1955.
786,182 No 34740/55.
a' Complete Specification Published: Nov 13, 1957.
Index at acceptance:-Class 20 ( 4), N( 5:10).
International Classification:-E 04 b.
COMPLETE SPECIFICATION
Improvements in a Shelter Roof Construction I, WILLEM PIETER LUBBERS,
a Dutch Subject, of Arabislaan 39, The Hague, Holland, do hereby
12. declare the invention for which I pray that a patent may be granted to
me and the method by which it is to be performed, to be particularly
described in and by the following statement:-
This invention relates to a shelter roof construction comprising
rafters secured' at one end to the ground or to a foundation, a roof
being fixed to these rafters, this roof having in cross-section
substantially the shape of a semi-parabola and terminating somewhat
above the foundation or the ground so that at the rear an opening is
formed Such a shelter roof construction has been described and
illustrated in my Specification No 34738/55 (Serial No 776,736) and
may be used as an automobile garage, station roof, market-hall,
bicycle shed, farm barn and for other purposes, this shelter roof
construction preventing rain and snow from entering the shelter
notwithstanding the fact that the latter is open at the front.
In case the direction of the wind is perpendicular to the open side of
such shelter roof construction, or forms an angle therewith, a
considerable amount of the oncoming air is deflected upwards in front
of the shelter roof construction, so that consequenly this air passes
over the said shelter roof construction Furthermore a circulation of
air occurs under the shelter roof construction, this circulation
moving in the upper region under the shelter roof from the front
towards the rear and in the lower region under the shelter roof from
the rear towards the front It has been found that this air circulation
is maintained for any direction of the wind Due to this air
circulation under the shelter roof construction, which extends to the
air in front of the shelter roof, and due to the air current deflected
upwards in front of the shelter roof construction, rain or snow are
prevented from entering under the said lPrice 3/6 l shelter roof
construction.
This invention aims at still improving this situation, which is
accomplished in that the roof has a rounded-off edge at its freely
projecting front In this way the deflection of 50 the air current in
front of the shelter roof construction is considerably improved,
whilst this also applies to the air circulation under this shelter
roof construction.
A still better effect is obtained if the front 55 portion of the
shelter roof construction is given a downwardly curved shape slightly
deviating from the parabolic form.
The invention will be described below with reference to the
accompanying drawings, 60 showing diagrammatically and by way of
example two embodiments of the shelter roof construction according to
the invention.
Fig 1 shows the shelter roof construction in perspective, 65 Fig 2
shows a section through the front portion of the shelter roof
13. construction on an enlarged scale.
As may be seen from Fig 1, the shelter roof construction comprises a
number of 70 rafters 1, secured, in spaced relation to each other, by
their lower ends, to a foundation 2, their other ends projecting
freely towards the front To the under side of these rafters a roof 3
of sheet material is fastened, which is 75 provided with spaced
purlins 4 extending in the longitudinal direction of the shelter roof
construction.
The lower edge 5 of this roof 3 extends at some distance from the
foundation 2 Due 80 to the fact that this shelter roof construction is
open both at the front and at the sides the space under this shelter
roof construction is easily accessible.
The front portion 6 of the shelter roof con 85 struction is slightly
curved downwards, and its front edge 7 is rounded off.
Fig 2 shows another shelter roof construction, of which the front
portion is not curved downwards, the front edge, however, being 90
786,182 rounded off according to a semi-circle.
The wind pressure on the shelter roof construction exerts its greatest
upward force on the roof when the shelter roof construction stands
with its open side turned to the wind.
In the case of a shelter roof construction of which the front portion
does not deviate from the parabolic form and has a straight edge, the
difference in pressure on the upper and lower surfaces of the roof is
about 1 2 times the excess pressure of the wind, except at the front
edge, where a difference of 2 3 times the excess pressure occurs over
a narrow strip By rounding off the front edge this excess pressure is
considerably reduced, a further reduction being obtained by bending
the front portion 6 downwards in the manner shown in Fig 1 When using
such an embodiment a greater portion of the oncoming air passes over
the roof.
The slight deflection of the front of the roof enables the wind
sweeping over the front edge to take along the rain drops and the
moisture from the downwardly inclined edge to the portion of the roof
lying behind the edge and inclining towards the rear, so that no
trouble is experienced in this respect.
It is obvious that the invention is not restricted to the embodiments
described above and shown in the drawings, but that these 30 may be
modified without departing from the scope of the invention as set out
in the appended claims It is, for example, not necessary that the
front edge of the roof should have the circular shape shown in Fig 2,
as 35 the rounding-off may have some other shape.
shape.
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* GB786183 (A)
Description: GB786183 (A) ? 1957-11-13
Improvements in a shelter roof construction
Description of GB786183 (A)
PATENT SPECIFICATION
Date of Application and filing Complete Specification: Dec 5, 1955.
7869183 No 34741/55.
Complete Specification Published: Nov 13, 1957.
Index at acceptance:-Class 20 ( 4), N( 5:1 O,11), International
Classification:-E 04 b.
COMPLETE SPECIFICATION
Improvements in a Shelter Roof Construction I, WILLEM PIETER LUBBERS,
a Dutch Subject, of Arabislaan 39, The Hague, Holland, do hereby
declare the invention for which I pray that a patent may be granted to
me and the method by which it is to be performed, to be particularly
described in and by the following statement: -
This invention relates to a shelter roof construction comprising
rafters secured at one end to the ground or to a foundation, a roof
being fixed to these rafters, this roof having in cross-section
substantially the shape of a semi-parabola Such a shelter roof
construction has been described and illustrated in my Specifications
Nos 347381 and 34739/55 (Serial Nos 776,736 and 786,181) and may be
used as an automobile garage, station roof, hangar, market-hall,
bicycle shed, farm barn and for other purposes, this shelter roof
construction preventing rain and snow from entering the space under
the roof notwithstanding the fact that the latter is open at the
front.
This invention aims at providing a shelter roof construction of that
15. kind in such way that the moisture condensing at the inner side of the
roof does not cause inconvenience.
This is achieved by the shelter roof construction according to the
invention in that the roof consists of thin sheet material to which
purlins are fastened by means of bolts, nails or the like,
intermediate spaces being provided between these purlins and the sheet
material in such a way that water of condensation may flow along the
inner side of the roof to one or more collecting gutters, to be
drained from the latter.
According to a feature of the invention the intermediate spaces may be
formed between the sheet material and the purlins by means of washers
or like spacing means arranged between the roof sheet and the purlins.
A preferred embodiment of the shelter roof construction according to
the invention is characterized in that for the water of conlPrice 3/6
l densation one drain gutter only is provided at the lower edge of the
roof, the said drain gutter being bent from the sheet material of the
roof itself.
The invention will be described below with 50 reference to the
accompanying drawings, showing by way of example an embodiment of the
shelter roof construction according to the invention.
Fig 1 shows this shelter roof construction 55 in perspective, Fig 2
shows a section along the line II-II of Fig 1 on an enlarged scale.
As is apparent from Fig 1, the shelter roof construction comprises a
number of 60 rafters 1, secured, in spaced relation to each other, by
their lower ends, to a foundation 2.
their other ends freely projecting towards the front A roof 3 of sheet
material is secured to the under side of these rafters 1, the said 65
roof being provided with spaced purlins 4 extending fin the
longitudinal direction of the shelter roof construction.
The lower edge 5 of this roof 3 extends at a distance from the
foundation 2 Due to 70 the fact that this shelter roof construction is
open both at the front and at the sides, the space under the shelter
roof is easily accessible.
As the construction of the rafters 1 does 75 not form part of this
invention, this construction will not be further described.
In Fig 2 the lower beam of a rafter 1 consists of a reversed U-iron To
both sides of this beam 6 an angle iron, 7 and 8 respec 80 tively, has
been fixed at the point of each purlin 4, for example by welding These
angle irons have only a small length, for example 60 mm, and are fixed
to the UL;shaped beams 6 in such a manner that their 85 leg which is
not fixed to these l I-beams 6 is positioned slightly higher than the
lower edge of the U-beams 6.
In the legs of these short angle irons 7 and 8 which are not connected
to the U 90 786,183 beams 6, holes 9 are provided in which bolts are
16. inserted, passing through the sheetlike roof 3, a washer 11 and a
purlin 4 When the nuts 12 are tightened, the purlins 4 are pressed
firmly against the angle irons 7 and 8, the washers 11 providing for a
free space between the roof 3 and the purlins 4, so that water of
condensation can flow down the roof, The bottom edge 5 of the roof may
be equipped with a collecting gutter 14 or may be constructed as a
collecting gutter.
It is obvious that the invention is not restricted to the embodiment
described above and shown in the drawing, but that it is possible to
provide many modifications without departing from the scope of the
invention as set out in the appended claims.
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