December 21
The first dry cell battery was invented in 1896. Unlike it's predesessors, it used a paste electrolyte instead of a liquid and thus became the first battery suitable for portable electrical devices, as it did not spill or break easily and worked in any orientation. The American Electrical Novelty and Manf. Company obtained a U.S. Patent on January 10, 1899 from David Misell, the English inventor. This "electric device" designed by Misell was powered by "D" batteries laid front to back in a paper tube with the light bulb and a rough brass reflector at the end.
The Companies first flashlights used energy-inefficient carbon-filament bulbs
they ran on zinc-carbon batteries which could not provide a steady electric current and required periodic 'rest' to continue functioning. The "resting" cycles occurred at frequent intervals due to the bulb type used. These issues gave way to the name "Flashlight", because they could be used only in brief flashes. The company donated some of these devices to the New York City police, who responded favorably to them.
they ran on zinc-carbon batteries which could not provide a steady electric current and required periodic 'rest' to continue functioning. The "resting" cycles occurred at frequent intervals due to the bulb type used. These issues gave way to the name "Flashlight", because they could be used only in brief flashes. The company donated some of these devices to the New York City police, who responded favorably to them.
Nowadays, flashlights are available powered by a multitude of energy sources: hand cranks that charge capacitors, solar, and shaken varieties that contain magnets, as well the standard battery version to name a few. Plus they are available to strap mount on your head or bike, hang from your keyring or stand on a tripod, some are even waterproof. Dad would be amazed.
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