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A mechanically powered flashlight (UK: mechanically powered torch) is a flashlight that is powered by electricity generated by the muscle power of the user, so it does not need replacement of batteries, or recharging from an electrical source. There are several types which use different operating mechanisms.
Just prior to World War II, a standard 90-degree battery-operated flashlight was adopted for the U.S. Army with the designation TL-122. [4] The TL-122 was itself a slightly altered version of the angle-head, brass-bodied Eveready Model No. 2694 Industrial flashlight and the No. 2697 Boy Scout flashlight, first introduced in 1927.
The Kel-Lite was a highly-durable, weather- and shock-resistant flashlight (UK: torch), made of heavy 6061-T6 aluminium. According to company founder Donald Keller, a Los Angeles County Deputy Sheriff, he began working on the concept in 1964 as he was tired of the lack of durability of the generically available, cheap metal flashlights of the day; the prototype was largely designed by 1968. [1]
Cameras with focal-plane shutters—even if they had PC connectors with X, F, M, or S-sync delays ("xenon sync" with zero delay and flashbulbs with peak delays of 5, 20, and 30 ms)—could not be used at speeds that attenuated guide numbers with most types of flashbulbs because their light curves were characterized by rapid rise and fall rates; the second shutter curtain would begin wiping ...
A list of the sizes of Mag Instrument flashlights, and the years they were released: 1979: D and C battery models are put on the market; targeted to the public safety and industrial sectors (the 5C, 6C, 7C and 7D models are out of production) 1982: MagCharger: a larger more expensive model popular with public safety and emergency-services ...
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NEW YORK — U.S. Soccer received a $30 million dollar gift from businesswoman and Washington Spirit owner Michele Kang, the organization announced Tuesday.
The original 1890s flashlights used a metal ring around the fiber body of the flashlight as one contact of a switch; the second contact was a movable metal loop that could be flipped down to touch the ring, completing the circuit. A wide variety of mechanical switch designs using slide switches, rocker switches, or side-mounted or end-mounted ...
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