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  2. Time clock - Wikipedia

    en.wikipedia.org/wiki/Time_clock

    Electronic time clock. A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card

  3. Self Winding Clock Company - Wikipedia

    en.wikipedia.org/wiki/Self_Winding_Clock_Company

    The Self Winding Clock Company (SWCC) was a major manufacturer of electromechanical clocks from 1886 until about 1970. [1] Based in New York City, the company was one of the first to power its clocks with an electric motor instead of winding by hand. A patented clock mechanism automatically rewinds the main spring each hour by the small ...

  4. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    Early versions erred by less than one minute per day, and later ones only by 10 seconds, very accurate for their time. Dials that showed minutes and seconds became common after the increase in accuracy made possible by the pendulum clock. Brahe used clocks with minutes and seconds to observe stellar positions. [112]

  5. List of clock manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_clock_manufacturers

    The following is a list of notable companies that produced, or currently produce clocks. Where known, the location of the company and the dates of clock manufacture follow the name. In some instances the "company" consisted of a single person.

  6. Pendulum clock - Wikipedia

    en.wikipedia.org/wiki/Pendulum_clock

    A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an approximate harmonic oscillator: It swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates.

  7. How two strangers found each other and solved the mystery of ...

    www.aol.com/news/two-strangers-found-other...

    The miniature grandfather clock never ticked in Greg Allison's childhood. The clock, just 7 inches high, sat under a rounded glass dome on one of the highest shelves in the library of his family's ...

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