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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 invention of the dry cell and miniature incandescent electric lamps made the first battery-powered flashlights possible around 1899. Today, flashlights use mostly light-emitting diodes and run on disposable or rechargeable batteries. Some are powered by the user turning a crank, shaking the lamp, or squeezing it
1959 Movieland Drive-In Theater (consisted of cars, a drive in board with car spaces, a place to list "Featured Movies" along with blue and white double-bill cards that slid into the marquee; the "movie" was a film strip that projected by a battery operated light bulb onto a 4"x6" screen that attached to the drive in. Titles included Heckle and ...
A diverse assortment of lighting and electrical products were also cataloged, such as exit signs, backup batteries, dimmer boards, connectors, effect projectors, chandeliers, marquee lights (and complete marquees), charging outlets for electric cars, switchboards, etc. Featured was a "Skyrocket" sign for Tilyou's Steeplechase Park in Coney ...
Screw-base C7 and C9 light sets use line voltage (120 volt) bulbs and are wired in parallel. LED-based sets use a current-limiting resistor to reduce the current supplied to each LED. Neon-lamp-based sets have lamps connected in parallel, each with its own current-limiting resistor. Battery-powered sets are also wired in parallel. [citation needed]
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.
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