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Methanometer
A methanometer is an instrument used to measure methane gas in the air of a mine. The Mine Safety Appliances Company Ltd. manufactured the first type - W8 Methanometer around 1950 and it was approved for use by the Ventilation Regulations of 1947. The Methanometer could be powered by an Edison battery cap lamp and it could be carried on a miner's belt with other tools. Methane is the main gas present in firedamp. It is highly explosive and had previously been detected by the blue halo effect it gave to the flame of a safety lamp. By 1983, several instruments for measuring methane concentration in air had been developed.Édouard Hospitalier, (Translated by Julius Maier) ''The Modern Applications of Electricity: Telephone; various applications; electrical transmission of energy, 2nd edition'', D. Appleton and company, 1883 chapter part II chapter 1 Methanometers pages 197-208 These relied on such methods as the differential heating of an incandescent platinum filament, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CLOSEUP OF MINE SAFETY DEVICES AS SHOWN AT A KENTUCKY STATE MINE SAFETY CONTEST HELD IN BENHAM, NEAR CUMBERLAND
A close-up or closeup in filmmaking, television production, still photography, and the comic strip medium is a type of shot that tightly frames a person or object. Close-ups are one of the standard shots used regularly with medium and long shots ( cinematic techniques). Close-ups display the most detail, but they do not include the broader scene. Moving toward or away from a close-up is a common type of zooming. A close up is taken from head to neck, giving the viewer a detailed view of the subject's face. History Most early filmmakers, such as Thomas Edison, Auguste and Louis Lumière and Georges Méliès, tended not to use close-ups and preferred to frame their subjects in long shots, similar to the stage. Film historians disagree as to the filmmaker who first used a close-up. One of the best claims is for George Albert Smith in Hove, who used medium close-ups in films as early as 1898 and by 1900 was incorporating extreme close-ups in films such as '' As Seen Throu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methane Gas
Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The relative abundance of methane on Earth makes it an economically attractive fuel, although capturing and storing it poses technical challenges due to its gaseous state under normal conditions for temperature and pressure. Naturally occurring methane is found both below ground and under the seafloor and is formed by both geological and biological processes. The largest reservoir of methane is under the seafloor in the form of methane clathrates. When methane reaches the surface and the atmosphere, it is known as atmospheric methane. The Earth's atmospheric methane concentration has increased by about 150% since 1750, and it accounts for 20% of the total radiative forcing from all of the long-lived and globally mixed greenhouse gases. It has also been detected on other planets ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mine Safety Appliances
Mine Safety Appliances, or MSA Safety Incorporated, is an American manufacturer and supplier of safety equipment designed for use in a variety of hazardous conditions in industries such as construction, the military, fire service, and chemical, oil, and gas production. Best known for its Bakelite ''Skullgard'' hard hat, the company’s product line includes gas monitoring and detection instruments, filter-type respirators, gas masks, breathing apparatus used by firefighters, thermal imaging cameras, firefighter helmets, ballistic body armor, military communications systems, a broad range of industrial head and fall protection products, and safety products for Do-It-Yourself consumers.The Wall Street Journal.Mine Safety Appliances Co. " Retrieved Feb 28, 2013.Bloomberg Businessweek.Mine Safety Appliances Co (MSA:New York)" Retrieved Feb 28, 2013. MSA is based in the Pittsburgh suburb of Cranberry.Yahoo Finance.Mine Safety Appliances Co. (MSA)" Retrieved Jan 10, 2013. It was foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edison Battery
Thomas Alva Edison (February 11, 1847October 18, 1931) was an American inventor and businessman. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. These inventions, which include the phonograph, the motion picture camera, and early versions of the electric light bulb, have had a widespread impact on the modern industrialized world. He was one of the first inventors to apply the principles of organized science and teamwork to the process of invention, working with many researchers and employees. He established the first industrial research laboratory. Edison was raised in the American Midwest. Early in his career he worked as a telegraph operator, which inspired some of his earliest inventions. In 1876, he established his first laboratory facility in Menlo Park, New Jersey, where many of his early inventions were developed. He later established a botanical laboratory in Fort Myers, Florida, in colla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cap Lamp
A cap lamp is a lamp worn on the head or helmet. It is mostly used in an underground environment, like mining, mines or during outdoor activity, outdoor activities, e.g. climbing. Patent A patent for a self-adjusting bracket for use with cap lamps was awarded in 1985. GEN 4 and GEN 5 The two most recent variants of the cap lamp are the GEN 4 and GEN 5 models. The GEN 4 model, approved for use by the Mine Safety and Health Administration (MHSA), uses the headpiece of existing cap lamps, but retrofitted with new Light-emitting diode, LEDs and electronics. The GEN 5 model is very similar to the GEN 4 model except with a more intense spot beam that can illuminate objects that are more than 40 feet away. Since GEN 5 is very similar to GEN 4, it has not been separately approved by MHSA. These lamps will last up to 50 hours with a six-cell battery pack. Energy-saving variants of these models, GEN 4E and GEN 5E, use a single lithium-ion battery. These new cap lamp variants that use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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