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  2. Marvin Heemeyer - Wikipedia

    en.wikipedia.org/wiki/Marvin_Heemeyer

    Marvin Heemeyer was born on October 28, 1951, on a dairy farm in South Dakota.In 1974, he moved to Colorado because he was stationed at Lowry Air Force Base. [3] In 1989, [3] he moved to Grand Lake, Colorado, about 16 miles (26 km) away from Granby.

  3. A 230-volt incandescent light bulb. Thomas Edison did not invent the light bulb. [ 419 ] 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. Crookes radiometer - Wikipedia

    en.wikipedia.org/wiki/Crookes_radiometer

    If light pressure were the cause of the rotation, then the better the vacuum in the bulb, the less air resistance to movement, and the faster the vanes should spin. In 1901, with a better vacuum pump, Pyotr Lebedev showed that in fact, the radiometer only works when there is low-pressure gas in the bulb, and the vanes stay motionless in a hard ...

  5. Yellow goods (construction and agriculture) - Wikipedia

    en.wikipedia.org/wiki/Yellow_goods_(construction...

    Bulldozers are a type of yellow good. Yellow goods are material for construction and earth-moving equipment, quarrying equipment, and fork-lift trucks. [1] The term is also used to encompass agricultural equipment, such as tractors. The term "yellow goods" originated from the distinctive yellow colour commonly used on these types of machinery. [2]

  6. High-intensity discharge lamp - Wikipedia

    en.wikipedia.org/wiki/High-intensity_discharge_lamp

    High-intensity discharge lamps (HID lamps) are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. [1] This tube is filled with noble gas and often also contains suitable metal or metal salts.

  7. Stack light - Wikipedia

    en.wikipedia.org/wiki/Stack_light

    Stack light in automated production for in-line quality inspection. Stack lights (also known as signal tower lights, indicator lights, andon lights, warning lights, industrial signal lights, or tower lights) are commonly used on equipment in industrial manufacturing and process control environments to provide visual and audible indicators of a machine's status to machine operators, technicians ...

  8. Gas-discharge lamp - Wikipedia

    en.wikipedia.org/wiki/Gas-discharge_lamp

    A flicker light bulb, flicker flame light bulb or flicker glow lamp is a gas-discharge lamp which produces light by ionizing a gas, usually neon mixed with helium and a small amount of nitrogen gas, by an electric current passing through two flame shaped electrode screens coated with partially decomposed barium azide. The ionized gas moves ...

  9. Halogen lamp - Wikipedia

    en.wikipedia.org/wiki/Halogen_lamp

    To reduce unintentional ultraviolet (UV) exposure, and to contain hot bulb fragments in the event of explosive bulb failure, general-purpose lamps usually have a UV-absorbing glass filter over or around the bulb. Alternatively, lamp bulbs may be doped or coated to filter out the UV radiation. With adequate filtering, a halogen lamp exposes ...