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  2. Project Echo - Wikipedia

    en.wikipedia.org/wiki/Project_Echo

    Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, ...

  3. A 230-volt incandescent light bulb. Thomas Edison did not invent the light bulb. [ 427 ] The team of inventors Edison employed at his laboratories in Menlo Park, New Jersey did, however, develop the first practical light bulb in 1880 (employing a carbonized bamboo filament), shortly prior to Joseph Swan , who invented an even more efficient ...

  4. Centennial Light - Wikipedia

    en.wikipedia.org/wiki/Centennial_Light

    The bulb is cared for by the Centennial Light Bulb Committee, a partnership of the Livermore-Pleasanton Fire Department, Livermore Heritage Guild, Lawrence Livermore National Laboratories, and Sandia National Laboratories. The Livermore-Pleasanton Fire Department plans to house and maintain the bulb for the rest of its life, regardless of length.

  5. Henry Woodward (inventor) - Wikipedia

    en.wikipedia.org/wiki/Henry_Woodward_(inventor)

    On July 24, 1874, Woodward and his partner, Mathew Evans, a hotel keeper, filed a Canadian patent application on an electric light bulb. [2] [3] It was granted on August 3, 1874, as Canadian patent number 3,738. [4] Woodward was a medical student at the time. Their light bulb comprised a glass tube with a large piece of carbon connected to two ...

  6. Electronic firing - Wikipedia

    en.wikipedia.org/wiki/Electronic_firing

    Electronic firing refers to the use of an electric current to fire a cartridge instead of a centerfire primer or rimfire primer. [1]In modern firearm designs, a firing pin and primer are used to ignite the propellant in the cartridge which propels the bullet forward.

  7. Edison light bulb - Wikipedia

    en.wikipedia.org/wiki/Edison_light_bulb

    Most of the bulbs in circulation are reproductions of the wound filament bulbs made popular by Edison Electric Light Company at the turn of the 20th century. They are easily identified by the long and complicated windings of their internal filaments, and by the very warm-yellow glow of the light they produce (many of the bulbs emit light at a ...

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