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  2. Lottery wheeling - Wikipedia

    en.wikipedia.org/wiki/Lottery_wheeling

    A lottery wheeling system acts as a single ticket in terms of a particular guarantee, but it allows playing with a set of numbers of size larger than the size of the set of numbers drawn in the lottery. For instance, a single ticket in a pick 6 lottery guarantees a 4-win if four of the player's numbers are drawn.

  3. Geneva drive - Wikipedia

    en.wikipedia.org/wiki/Geneva_drive

    The Geneva drive or Geneva mechanism is a gear mechanism that translates a continuous rotation movement into intermittent rotary motion. The rotating drive wheel is usually equipped with a pin that reaches into a slot located in the other wheel ( driven wheel) that advances it by one step at a time. The drive wheel also has an elevated circular ...

  4. Wagon-wheel effect - Wikipedia

    en.wikipedia.org/wiki/Wagon-wheel_effect

    Video of a spinning, patterned paper disc. At a certain speed the sets of spokes appear to slow and rotate in opposite directions. The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly ...

  5. Timeline of United States inventions (1890–1945) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    A Ferris wheel is a non-building structure, consisting of an upright wheel with passenger gondolas attached to the rim. Opened on June 21, 1893, at the Chicago World's Fair, the original Ferris wheel was invented two years earlier by the Pittsburgh bridge-builder George Washington Gale Ferris Jr. in 1891. [19] 1891 Dow process

  6. Prince William Used to 'Whisk' Kate Middleton Off for Hotel ...

    www.aol.com/prince-william-used-whisk-kate...

    When the couple wanted to get away from it all, "he’d often whisk Catherine off to Highgrove or Sandringham or to a cottage on the Balmoral estate,” Jobson wrote in the new book, out Aug. 6 ...

  7. Wheel theory - Wikipedia

    en.wikipedia.org/wiki/Wheel_theory

    Wheel theory. A diagram of a wheel, as the real projective line with a point at nullity (denoted by ⊥). A wheel is a type of algebra (in the sense of universal algebra) where division is always defined. In particular, division by zero is meaningful. The real numbers can be extended to a wheel, as can any commutative ring .

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