WISDOM Lamp catalog(v1.8) Cap Lamp & Multi Purpose Lampwisdom lamp
WISDOM designs and manufactures LED lamp (hard hat light) including mining cap lamp with cable, cordless headlamp. WISDOM's goal is to produce high performance and excellent quality lamps to buyers.
Étude sur les matières premières (or, argent, cuivre) 2013PwC France
http://pwc.to/1fcPlsH
Chaque année, PwC réalise une étude sur les sociétés minières dans le monde entier. Cette année, outre l’or, PwC a inclus des sociétés minières spécialisées dans l’argent et le cuivre, sélectionnées parmi plus d'une centaine de sociétés de petite, moyenne ou grande taille. Toutes les données sont exprimées en dollars américains.
The first report was published in 2010. Each year, our report canvass the views of mining leaders across the country on their growth outlook and prospects, employment and pricing, challenges, opportunities and business priorities, and their advice to Canberra. Over the last seven years, the Mining Business Outlook Report has reported on the highs and lows of the industry first-hand. From broadcasting sentiment when mining was at its peak, to documenting the collapse in confidence as the sustained fall in commodity prices killed the mining investment boom, this report has provided expert insights into an industry facing turbulent times. In 2016, the Federal Government continues to lead the discussion of an economy in transition away from mining and resources. However, as this report shows, in an industry sector that accounts for more than 50 per cent of the value of all Australian exports, our interviews with mining leaders clearly suggest a shift in industry sentiment and potentially, a sustained improvement in the outlook for the sector. Despite the lows that still exist in parts of the industry, there has been a huge surge in sentiment. The outlook for mining appears more positive than it has been in the last three years, with a rise in cautious optimism from below 10 per cent two years ago, to nearly 50 per cent today. The underlying reasons for this are that many leaders have made the difficult changes necessary for their businesses to survive in today’s climate
of low commodity prices. There is a growing sense that prices have stabilised and the next price trend, though it may not occur soon, will be up. In addition to our 50 interviews with mining leaders across key commodities, this year we were also fortunate enough to conduct an exclusive interview with Gina Rinehart, one of Australia’s mining magnates, well-documented for her achievements with Roy Hill, Australia’s largest iron ore mine. Mrs Rinehart remains cautiously optimistic about iron ore, but also warns that in order to retain global competitiveness for Australia’s mining sector, the Australian Government and industry leaders must take urgent action. In summary, there appear to be signs of resurgence in the sector over the next 12 months, with a more confident outlook for the future. However, the sector is also calling out for clearer polices and Government backing in order to support its ongoing contribution to Australia’s economic prosperity, as we once again get ready for an election.
We The People, session v, First AmendmentJim Powers
This begins our look at the Bill of Rights. We see how these freedoms of expression come to be protected from state as well as federal repression. The Supreme Court used the Fourteenth Amendment to selectively incorporate these guarantees in a series of twentieth century decisions.
A comprehensive Power Point presentation about the gold rushes in New Zealand. This is a historical and geographical perspective containing a time chart of gold discovery in Aotearoa, and details about the most important goldfields in Nelson, Coromandel, Otago and West Coast. Also, the presentation contains information about the gold seekers and about the miners' life. Please send me a message if you want to download this Power Point presentation for educational purposes.
this is a short power point on miner strike which includes
What were the circumstances of incident
What was the thinking behind this show of opinions
What was the governments response
and loads more.
hope this helps
WISDOM Lamp catalog(v1.8) Cap Lamp & Multi Purpose Lampwisdom lamp
WISDOM designs and manufactures LED lamp (hard hat light) including mining cap lamp with cable, cordless headlamp. WISDOM's goal is to produce high performance and excellent quality lamps to buyers.
Étude sur les matières premières (or, argent, cuivre) 2013PwC France
http://pwc.to/1fcPlsH
Chaque année, PwC réalise une étude sur les sociétés minières dans le monde entier. Cette année, outre l’or, PwC a inclus des sociétés minières spécialisées dans l’argent et le cuivre, sélectionnées parmi plus d'une centaine de sociétés de petite, moyenne ou grande taille. Toutes les données sont exprimées en dollars américains.
The first report was published in 2010. Each year, our report canvass the views of mining leaders across the country on their growth outlook and prospects, employment and pricing, challenges, opportunities and business priorities, and their advice to Canberra. Over the last seven years, the Mining Business Outlook Report has reported on the highs and lows of the industry first-hand. From broadcasting sentiment when mining was at its peak, to documenting the collapse in confidence as the sustained fall in commodity prices killed the mining investment boom, this report has provided expert insights into an industry facing turbulent times. In 2016, the Federal Government continues to lead the discussion of an economy in transition away from mining and resources. However, as this report shows, in an industry sector that accounts for more than 50 per cent of the value of all Australian exports, our interviews with mining leaders clearly suggest a shift in industry sentiment and potentially, a sustained improvement in the outlook for the sector. Despite the lows that still exist in parts of the industry, there has been a huge surge in sentiment. The outlook for mining appears more positive than it has been in the last three years, with a rise in cautious optimism from below 10 per cent two years ago, to nearly 50 per cent today. The underlying reasons for this are that many leaders have made the difficult changes necessary for their businesses to survive in today’s climate
of low commodity prices. There is a growing sense that prices have stabilised and the next price trend, though it may not occur soon, will be up. In addition to our 50 interviews with mining leaders across key commodities, this year we were also fortunate enough to conduct an exclusive interview with Gina Rinehart, one of Australia’s mining magnates, well-documented for her achievements with Roy Hill, Australia’s largest iron ore mine. Mrs Rinehart remains cautiously optimistic about iron ore, but also warns that in order to retain global competitiveness for Australia’s mining sector, the Australian Government and industry leaders must take urgent action. In summary, there appear to be signs of resurgence in the sector over the next 12 months, with a more confident outlook for the future. However, the sector is also calling out for clearer polices and Government backing in order to support its ongoing contribution to Australia’s economic prosperity, as we once again get ready for an election.
We The People, session v, First AmendmentJim Powers
This begins our look at the Bill of Rights. We see how these freedoms of expression come to be protected from state as well as federal repression. The Supreme Court used the Fourteenth Amendment to selectively incorporate these guarantees in a series of twentieth century decisions.
A comprehensive Power Point presentation about the gold rushes in New Zealand. This is a historical and geographical perspective containing a time chart of gold discovery in Aotearoa, and details about the most important goldfields in Nelson, Coromandel, Otago and West Coast. Also, the presentation contains information about the gold seekers and about the miners' life. Please send me a message if you want to download this Power Point presentation for educational purposes.
this is a short power point on miner strike which includes
What were the circumstances of incident
What was the thinking behind this show of opinions
What was the governments response
and loads more.
hope this helps
CASE STUDY 5Exploring Innovation in Action The Dimming of the.docxwendolynhalbert
CASE STUDY 5
Exploring Innovation in Action: The Dimming of the Light Bulb
In the beginning….
God said let there be light. And for a long time this came from a rather primitive but surprisingly effective method – the oil lamp. From the early days of putting simple wicks into congealed animal fats, through candles to more sophisticated oil lamps, people have been using this form of illumination. Archaeologists tell us this goes back at least 40,000 years so there has been plenty of scope for innovation to improve the basic idea! Certainly by the time of the Romans, domestic illumination – albeit with candles – was a well-developed feature of civilised society.
Not a lot changed until the late eighteenth century when the expansion of the mining industry led to experiments with uses for coal gas – one of which was as an alternative source of illumination. One of the pioneers of research in the coal industry – Humphrey Davy – invented the carbon arc lamp and ushered in a new era of safety within the mines, but also opened the door to alternative forms of domestic illumination and the era of gas lighting began.
But it was not until the middle of the following century that researchers began to explore the possibilities of using a new power source and some new physical effects. Experiments by Joseph Swann in England and Moses Farmer in the USA (amongst others) led to the development of a device in which a tiny metal filament enclosed within a glass envelope was heated to incandescence by an electric current. This was the first electric light bulb – and it still bears more than a passing resemblance to the product found hanging from millions of ceilings all around the world.
By 1879 it became clear that there was significant commercial potential in such lighting – not just for domestic use. Two events occurred during that year which were to have far-reaching effects on the emergence of a new industry. The first was that the city of Cleveland – although using a different lamp technology (carbon arc) – introduced the first public street lighting. And the second was that patents were registered for the incandescent filament light bulb by Joseph Swann in England and one Thomas Edison in the USA.
Needless to say the firms involved in gas supply and distribution and the gas lighting industry were not taking the threat from electric light lying down and they responded with a series of improvement innovations which helped retain gas lighting’s popularity for much of the late nineteenth century. Much of what happened over the next 30 years is a good example of what is sometimes called the ‘sailing ship effect’. That is, just as in the shipping world the invention of steam power did not instantly lead to the disappearance of sailing ships but instead triggered a whole series of improvement in that industry, so the gas lighting industry consolidated its position through incremental product and process innovations.
But electric lighting was also improvin ...
CASE STUDY 5Exploring Innovation in Action The Dimming of the Lig.docxPazSilviapm
CASE STUDY 5
Exploring Innovation in Action: The Dimming of the Light Bulb
In the beginning….
God said let there be light. And for a long time this came from a rather primitive but surprisingly effective method – the oil lamp. From the early days of putting simple wicks into congealed animal fats, through candles to more sophisticated oil lamps, people have been using this form of illumination. Archaeologists tell us this goes back at least 40,000 years so there has been plenty of scope for innovation to improve the basic idea! Certainly by the time of the Romans, domestic illumination – albeit with candles – was a well-developed feature of civilised society.
Not a lot changed until the late eighteenth century when the expansion of the mining industry led to experiments with uses for coal gas – one of which was as an alternative source of illumination. One of the pioneers of research in the coal industry – Humphrey Davy – invented the carbon arc lamp and ushered in a new era of safety within the mines, but also opened the door to alternative forms of domestic illumination and the era of gas lighting began.
But it was not until the middle of the following century that researchers began to explore the possibilities of using a new power source and some new physical effects. Experiments by Joseph Swann in England and Moses Farmer in the USA (amongst others) led to the development of a device in which a tiny metal filament enclosed within a glass envelope was heated to incandescence by an electric current. This was the first electric light bulb – and it still bears more than a passing resemblance to the product found hanging from millions of ceilings all around the world.
By 1879 it became clear that there was significant commercial potential in such lighting – not just for domestic use. Two events occurred during that year which were to have far-reaching effects on the emergence of a new industry. The first was that the city of Cleveland – although using a different lamp technology (carbon arc) – introduced the first public street lighting. And the second was that patents were registered for the incandescent filament light bulb by Joseph Swann in England and one Thomas Edison in the USA.
Needless to say the firms involved in gas supply and distribution and the gas lighting industry were not taking the threat from electric light lying down and they responded with a series of improvement innovations which helped retain gas lighting’s popularity for much of the late nineteenth century. Much of what happened over the next 30 years is a good example of what is sometimes called the ‘sailing ship effect’. That is, just as in the shipping world the invention of steam power did not instantly lead to the disappearance of sailing ships but instead triggered a whole series of improvement in that industry, so the gas lighting industry consolidated its position through incremental product and process innovations.
But electric lighting was also improving and th.
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Miners lamps history
1. miners lamps history
The depth, the dark, and the dangers inherent in mining created a uniquely
dangerous working environment for the miner. Miners faced death from
collapsing mines, oxygen deprivation, and haulage accidents, with the
specter of fatal lung disease remaining even after the miner had left the
mines. But the most instantaneous and catastrophic loss of life was caused
by explosions due to miner's lamps igniting methane gas.
A miner's light was essential to their labor. Without light there was no sight,
no work, and no wages. But this essential light was also lethal. Open flames
could ignite the inflammable gas especially prevalent in coal mines and
mining explosions with hundreds of casualties was a common occurrence in
the late 19th and early 20th century. Miners often carried open flames into
the mines in the form of candles and hanging lamps, and later wore the open
flames of carbide lamps and oil-wick lamps on their caps and helmets.
Saucer-type Open Grease Lamps
The first type of mine light, the open saucer-type grease lamp, was popular
in the 1700's and was often decorated with ornamental figures such as
roosters. These figures acted as good luck charms for the miner.
Candle Moulds
2. Before 1850, miners would use candles or small lamps that were hung from
crevices or hammered into timbers near their work. From 1850 until around
1915, miner's headgear generally consisted of cloth or canvas hats with
leather brims and metal lamp brackets on the forehead that allowed them to
hang a source of light on the front of their cap. Caps served the ancillary use
of protecting the miner's eyes from smoke or soot and their head from small
bumps, but its main purpose was as a mount for their lamps.
Later, candles made of hard tallow became a popular source of light within
the mines. The candle-holder was adopted for use in the mines as well. It
consisted of a 3/8-inch iron rod twisted into a looped handle at one end and
a sharpened point at the other. Often there was a hook on the holder and
when the point could not be driven into a suitable support, the holder could
be hung from any overhang or protrusion in the mine.
Oil Wick Lamps
Around 1850, the oil-wick cap lamp was invented in Scotland. Oil-wick cap
lamps were shaped like small kettles-a small font that contained oil fueled a
wick that was stuffed into the spout. The oil-wick cap lamp issued a bare
flame, giving off enough light for miners to see what was in front of their
face, but not much further. The oil-fueled flame was exceedingly smoky,
and could easily ignite flammable gasses (mainly methane) found in coal
mines. These lamps were worn on soft caps that offered little in the way of
protection and were mainly worn for the convenience of having a light
source in front of the miner's face.
As mining progressed, oil wick lamps became increasingly popular because
they were cheaper to burn than tallow candles and easier to balance and
3. carry in the mines. Manufactured between 1860 and 1920, these lamps
differed in size and shape but operated on the same basic principle.
A small conical font 1½ to 2½ inches tall and about 1-inch in diameter held
the fuel and a hinged snap cap sealed the top. The long neck or spout
extended up and outward from one side on the font. Opposite the spout, a
wire hook was fastened to the font to fit on a miner's leather or cloth cap. It
looked like a small teapot with a brush hanging out the spout. The wick
brought the fuel from the font to the tip.
Davy lamp(Carriage Lamps)
The man who made the real breakthrough in this area was Sir Humphry
Davy when he invented what is known as the Davy Lamp or a
gauze-enclosed lamp. Although gauze alone could not guarantee that the
flame would not come into contact with gases outside the screen, Sir Davy
reasoned that a metal mesh would cool down the flame before it came into
contact with any fire damp. These gases explode at certain temperatures but
will extinguish a flame that is cooler.
To prevent miners from opening their safety lamp underground,
considerable attention was paid to locks. Most safety lamps were equipped
with a padlock, keyed setscrews, melted soft-metal locking inserts or
magnetic spring-loaded latches.
Before the 19th century, this forced miners to use open flames that had the
potential to ignite the flammable gasses inside mines, causing lethal
explosions. The flammable gas (firedamp) consisted mainly of methane and
4. was most often found in coal mines. A need was seen to provide a safe light
for miners to use in gaseous mines, and several inventors set upon the task
independently. The three main progenitors of early safety lamps were Dr.
William Reid Clanny, Sir Humphry Davy, and George Stephenson.
The first to set upon the idea of a safety lamp was Dr. William Clanny. As a
physician in Sunderland, England, Clanny routinely attended to patients
injured in mining explosions. In 1813 Clanny revealed his first design for a
lamp in a paper to the Royal Philosophical Society. Clanny enclosed the
flame in glass with layers of water above and below the flame to "seal in the
fire." A bellows supplied oxygen through a tube into the chamber to keep
the flame alight. The bellows made this lamp impractical for daily use, and
the flame was extinguished when tested in a mixture of inflammable gas.
George Stephenson was an English engineer who also began to try to invent
a safe lamp in 1815. Through trial and error he came upon a design that
worked. He encased the lamp in a glass cylinder, which was capped with a
metallic cover with tiny holes. This was covered with a metal bonnet to
further remove the flame from the dangers of the flammable gas.
The Englishman Sir Humphry Davy was already a scientist and inventor of
national renown when he seized upon the idea of a safety lamp in 1815.
Davy had performed numerous scientific experiments on all natures of
gasses, and this experience proved useful in battling the flammable firedamp
found in gaseous mines. Davy’s invention was to surround the flame with a
metallic mesh screen. Air could pass through the screen to fuel the flame,
but if the holes in the screen were small enough, the mesh would cool the
flame to such an extent that it could not ignite the gas surrounding the lamp.
This design allowed the Davy lamp to serve as a test for the presences of
certain gasses. If firedamp was present, the flame would burn with a blue
“cap.” The length of the cap would determine how much gas was present.
Some lamps in the collection are these so called “test lamps” with marks in
the lamp's glass used to measure the flame’s cap. While flammable gasses
were the most prominent threat in mines, asphyxiant gasses also presented a
danger. Davy’s safety lamp helped with this issue as well, as miners could
use Davy’s lamp to check for harmful concentrations of carbon dioxide,
which would extinguish the flame at a non-lethal concentration, alerting the
miner’s to unsafe working conditions.
Although safety lamps addressed the issue of mining explosions, they did
not become as numerous as other mining lights for a variety of reasons.
Many miners objected to using safety lamps because they were cumbersome,
could not be worn on the cap, and gave a poor light, which all served to
reduce a miner’s efficiency. Since most miners were paid by the pound, a
reduction in efficiency amounted to a reduction in pay, and so the risk of an
5. explosion was a chance miners were willing to take. Additionally, many
miners objected to the false confidence instilled in many who used a safety
lamp, and claimed that safety lamps obscured the real issue of unsafe
working conditions and would hinder the development of improved
ventilation needed in mines. Safety lamps had one unique advantage—they
could safely burn off methane in mines which kept them in use by mine
bosses even after the invention of battery-powered lamps.
Safety lamps were manufactured by a variety of companies from around
1815 until the 1930s, and incorporated elements of their design from Clanny,
Stephenson, and Davy. Most of the safety lamps in the collection of the
Division of Work and Industry include all three inventor’s contributions
towards a safety lamp—a glass enclosure around the flame for more
effective lighting, mesh uppers to cool the flame, and metal bonnet to better
protect the flame from being extinguished by gusts or drafts in mines.
Carbide Lamps
Carbide lamps are powered by the reaction of calcium carbide (CaC2) with
water (H2O). This reaction produces acetylene gas (C2H2) which burns a
clean, white flame. Acetylene gas was originally discovered by Edmund
Davy in 1836, but commercial production of calcium carbide only became
feasible due to the efforts of Thomas Wilson in 1894. Frederick Baldwin is
credited with developing the first carbide mining lamp, holding U.S. Patent
number 656,874 for an Acetylene Gas Lamp that was granted August 28,
1900. Commercial production of carbide mining lamps began soon after,
and the collection in the Division of Work and Industry reflects a variety of
carbide lamp designers and manufacturers including Baldwin, Auto-Lite,
6. Guy’s Dropper, Shanklin, Dewar, and Wolf. Carbide lamps came in
different sizes for different uses, smaller lamps were cap lamps, larger lamps
were hand lamps or hanging lamps.
The general design of carbide lamps was consistent across designers and
manufacturers, with the differences often being improvements to the
water-drip mechanism or gas feed. The similarity of lamps was an issue for
Frederick Baldwin, who sued many of his competitors for patent
infringement. The design of the carbide lamp consists of two chambers—an
upper chamber holding water and a lower chamber holding the calcium
carbide. Acetylene gas is produced when water from the lamp's upper level
encounters the calcium carbide stored in the base via a dripping mechanism.
The amount of water flowing into the calcium carbide container can be
controlled, with more water producing more gas and a bigger flame when
the lamp is lit. The gas is funneled to the burner, where it is lit by a match or
a built-in striker. Once the flame is lit, a reflector allows the miner to control
the direction of the light.
The carbide lamp consisted of several improvements to both the oil-wick
lamp and candle as a means for lighting in non-gaseous mines. The lamp
produced no carbon monoxide, consumed less oxygen, gave a brighter 4-6
candlepower light, and had a higher light quality than the candles or
oil-wick lamps it replaced. The carbide lamp had its problems as well.
Average runtime in carbide cap lamps was only about four hours,
necessitating a carbide refill mid-shift, which could leave the miner in
darkness. The burner tip was also prone to clogging, and concussive blasts
or winds inside the mine could extinguish the light as well.
The popularity of carbide mining lamps was short–lived, as electric battery
powered lamps came into favor around 1918 due to their superior light,
safety, and runtime, and had almost completely replaced carbide lamps by
the 1930s.
In 1892, while working with lime, coal tar and a carbon mixture, Major
James T. Morehead and Thomas L. Willson developed a brownish-grey
substance that gave off a pungent smelling gas when mixed with water. This
gas burned with a bright yellow-white flame and they called it acetylene.
Within eight years the first carbide lamp was offered to the public.
Carbide Cap Lamps
7. The first carbide cap lamps weighed approximately four ounces and were
four inches high and 1 ½ inches in diameter. The lamp consisted of two
compartments that screwed together. The upper part contained water whose
flow into the lower chamber containing the carbide, was controlled by a drip
valve. A three-inch reflector directed a light of ten-foot candle power and
was a great improvement over the tallow candle.
Electric Lamps
The early years of the 20th century were some of the deadliest years in the
recorded history of mining in the United States as the demands of an
industrializing society created increased demands for coal. In 1909 20 coal
mine disasters were recorded, the most on record. In 1910, 25 mine disasters
(metal/nonmetal and coal) were recorded. The Monongah Coal mine in
West Virginia was the site of the largest coal mine disaster in U.S. history in
1907 with 362 deaths recorded. This disaster prompted Congress to create
8. the U.S. Bureau of Mines as an attempt to improve working conditions
across the country.
It was these mounting disasters that prompted mine engineer John T. Ryan
Sr. and George H. Deike to found the Mine Safety Appliances Company
(MSA) in 1914. They enlisted Thomas Edison to help them create a
dependable and safe electric cap lamp. Electricity had been available in
homes for years, but the application of electric lighting in mines was a
harder proposition due to the extensive wiring costs.
The solution to this problem was a rechargeable battery pack designed by
Edison. The Edison Cap Lamp consisted of a battery encased in a
self-locking steel case worn on the miner’s belt. A flexible cord traveled to
the cap lamp, and its entrance into the battery was protected by a flexible
steel cover. The battery could power a six-candlepower lamp for 12 hours
and was recharged at the end of a miner’s shift. Safety measures in the bulb
included an immediate disconnect of the electrical contacts if the bulb was
broken that cooled the tungsten filament to such a degree that it would not
ignite any flammable gasses in the air.
The MSA Company later manufactured helmets optimized for the Edison
Cap Lamp featuring a mount in the front for the lamp and a guide in the
back for the cable, allowing the miner to move around freely without any
encumbrance from the wire running from the battery to the bulb. Bullard
“Hard Boiled” mining helmets also included a leather mount that could
accommodate either a carbide lamp or an electric lamp, with a cord guide on
the hat’s reverse. An example of this cap lamp can be seen to the left. Before
safety regulations required helmets, miners wore electric lamps on both their
canvas caps and hard helmets.
A portable lamp is composed of two parts, the battery which furnishes the
current, and the bulb. The bulb was perfected quickly but the battery was
troublesome. In fact, none of the early experimental lamps proved
successful, as the bulb required too heavy a battery. Also, leakage of acid
was a serious problem. Today, the cap lamp uses a non-spillable battery and
a parabolic reflector equipped with safety features that hooks onto the
miner's cap. Electric lamps came on market around the year1902 and have a
lifespan of approximately five years.
The dawn of the electric lamp allowed the miner to work in any position
without restraint, as it did not interfere with the free motion of the body.
Lamphouses at the various collieries had facilities for charging, cleaning,
and filling both electric lamps and oil safety lamps.
9. LED miners cap lamps
After keeping on improving, CORDLESS2 from WISDOM has been to be
the most advanced cordless cap lamp. It is much lighter, brighter and more
reliable.
Super-light: Cordless2 is much smaller and lighter. The lightest one is only
128g lighter than iPone4S;
Super-bright: Cordless2 applies the most advanced Panasonic 18650 battery
and CREE light source.
Super-reliable: Cordless2 has been approved by IP68 which is very difficult
to reach. And it means that CORDLESS2 is workable underwater 50m.
Super-safe: Cordless2 has been approved by ATEX95 which proves that it is
absolutely explosion proof and impact resistant and it is workable in the
high-danger working environments. Besides, it has approved by MSHA
which is thrown in 6 feet for 20 times. And WISDOM is the first one to be
approved by MSHA in Asia.