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  2. Pelton wheel - Wikipedia

    en.wikipedia.org/wiki/Pelton_wheel

    The Pelton wheel or Pelton Turbine is an impulse -type water turbine invented by American inventor Lester Allan Pelton in the 1870s. [1] [2] The Pelton wheel extracts energy from the impulse of moving water, as opposed to water's dead weight like the traditional overshot water wheel. Many earlier variations of impulse turbines existed, but they ...

  3. Lottery wheeling - Wikipedia

    en.wikipedia.org/wiki/Lottery_wheeling

    Lottery wheeling (also known as lottery system, lottery wheel, lottery wheeling system) is a method of selecting multiple lottery tickets, widely used by individual players and syndicates to secure wins provided they hit some of the drawn numbers.

  4. Wheel of Fortune (American game show) - Wikipedia

    en.wikipedia.org/wiki/Wheel_of_Fortune_(American...

    The games are all similar, incorporating a wheel, puzzle display board, play money and various accessories like Free Spin tokens. Milton Bradley released the first board game in 1975. In addition to all the supplies mentioned above, the game included 20 prize cards to simulate the "shopping" prizes of the show, with prizes ranging in value from ...

  5. Slot machine - Wikipedia

    en.wikipedia.org/wiki/Slot_machine

    Free spins are usually triggered via a scatter of at least three designated symbols (with the number of spins dependent on the number of symbols that land). Some games allow the free spins bonus to "retrigger", which adds additional spins on top of those already awarded. There is no theoretical limit to the number of free spins obtainable.

  6. Free-piston engine - Wikipedia

    en.wikipedia.org/wiki/Free-piston_engine

    Free-piston engine used as a gas generator to drive a turbine. A free-piston engine is a linear, 'crankless' internal combustion engine, in which the piston motion is not controlled by a crankshaft but determined by the interaction of forces from the combustion chamber gases, a rebound device (e.g., a piston in a closed cylinder) and a load device (e.g. a gas compressor or a linear alternator).

  7. Freewheel - Wikipedia

    en.wikipedia.org/wiki/Freewheel

    Ratcheting freewheel mechanism (van Anden, 1869) In mechanical or automotive engineering, a freewheel or overrunning clutch is a device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft. An overdrive is sometimes mistakenly called a freewheel, but is otherwise unrelated.

  8. Electrostatic generator - Wikipedia

    en.wikipedia.org/wiki/Electrostatic_generator

    12" Quadruple Sector-less Wimshurst Machine (Bonetti Machine) An electrostatic generator, or electrostatic machine, is an electrical generator that produces static electricity, or electricity at high voltage and low continuous current. The knowledge of static electricity dates back to the earliest civilizations, but for millennia it remained ...

  9. Custom wheel - Wikipedia

    en.wikipedia.org/wiki/Custom_wheel

    Custom wheels are one of the most common ways in which automobile enthusiasts customize their vehicles. Competition-oriented enthusiasts typically switch to lighter, stronger, or larger wheels, while appearance-oriented enthusiasts more often choose larger and more visually distinctive wheels. The most-desirable characteristics of custom wheels ...

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