gas mantle वाक्य
उदाहरण वाक्य
मोबाइल
- The gas mantle remained an important part of street lighting until the widespread introduction of electric lighting in the early 1900s.
- Similarly, thorium gas mantles are very slightly radioactive when new, but become far more radioactive after only a few months of storage.
- In 1923, the light was converted to a incandescent gas mantle fueled by vapourised kerosene, with an intensity of 100, 000 cd.
- Like the Welsbach / General Gas Mantle site, the Martin Aaron, Inc . site was placed on the National Priorities list in 1999.
- A notable exception, discovered in the early 19th century, is the use of a gas mantle mounted above the wick on a kerosene lamp.
- In 1925, the light was upgraded to a 35mm incandescent gas mantle fueled by pressurised kerosene, with an intensity of 225, 000 cd, visible for.
- Experiments also began in Alabama's state prison farm to grow Ramie, a tough, stiff fibre used in gas mantles which was no longer available from Asia.
- Since it was declared a Superfund site, the EPA has removed over 350, 000 tons of contaminated materials from the Welsbach / General Gas Mantle site.
- This marked the first widespread use of floodlighting at a fair, and also the first use of high-pressure gas mantle lamps and of high-wattage tungsten filament lamps.
- A 1956 test carried out at Motor Industry Research Association ( MIRA ) proving grounds near Nuneaton in Warwickshire, saw of testing produce just one broken gas mantle.
- Cannel gas was widely used for domestic lighting throughout the 19th century before the invention of the incandescent gas mantle by Carl Auer von Welsbach in the 1880s.
- Thorium was once commonly used as the light source in gas mantles and as an alloying material, but these applications have declined due to concerns about its radioactivity.
- Other hydrocarbon fuels such as white gasoline, propane, and natural gas are often burned in a lamp with a gas mantle which greatly increases the amount of light.
- As a result, owning and handling small amounts of thorium, such as those in a gas mantle, is considered safe, although usage of such items may pose some risks.
- The modern gas mantle was one of the many inventions of Carl Auer von Welsbach, a chemist who studied rare earth elements in the 1880s and who had been Robert Bunsen's student.
- One potential cause for concern is that particles from thorium gas mantles " fall out " over time and get into the air, where they may be ingested in food or drink.
- In June 2001 the NUREG published a study about the " Systematic Radiological Assessment of Exemptions for Source and Byproduct Materials " stating that radioactive gas mantles are explicitly legal in the US.
- Following the introduction of the gas mantle, cannel coal lost favour as a manufactured gas feedstock as the gas mantle could produce large quantities of light without regard for the flame luminosity of the gas burnt.
- Following the introduction of the gas mantle, cannel coal lost favour as a manufactured gas feedstock as the gas mantle could produce large quantities of light without regard for the flame luminosity of the gas burnt.
- Efficient gas mantles and electric lighting were eroding the illuminating oil market beginning in the 1880s; however a previously low value byproduct of refining was gasoline, which more than offset the role of kerosene in the early 20th century.
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