5771 5775.output

* 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

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

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

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.
* Sitemap
* Accessibility
* Legal notice
* Terms of use
* 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
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

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.
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.
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

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

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

* 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
PATENT SPECIFICXTION
786,181 Date of Application and filing Complete
Specification: Dec 5, /955 No 34739/
Index at acceptance:-Class 20 ( 4), N( 5:10).
International Classification:-E 04 b.
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

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.

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

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
* Sitemap
* Accessibility
* Legal notice
* Terms of use
* 5.8.23.4; 93p
* GB786182 (A)
Description: GB786182 (A) ? 1957-11-13
Improvements in a shelter roof construction
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.
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 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

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.
* Sitemap

* Accessibility
* Legal notice
* Terms of use
* 5.8.23.4; 93p
* GB786183 (A)
Description: GB786183 (A) ? 1957-11-13
Improvements in a shelter roof construction
Date of Application and filing Complete Specification: Dec 5, 1955.
7869183 No 34741/55.
Index at acceptance:-Class 20 ( 4), N( 5:1 O,11), International
Classification:-E 04 b.
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

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

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.
* Sitemap
* Accessibility
* Legal notice
* Terms of use
* 5.8.23.4; 93p

5771 5775.output

Recommended

Recommended

More Related Content

What's hot

What's hot (7)

Viewers also liked

Viewers also liked (11)

Similar to 5771 5775.output

Similar to 5771 5775.output (20)

More from j1075017

More from j1075017 (20)

Recently uploaded

Recently uploaded (14)

5771 5775.output