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  2. Quartz clock - Wikipedia

    en.wikipedia.org/wiki/Quartz_clock

    The Lavet-type stepping motors used in analog quartz clock movements which themselves are driven by a magnetic field (generated by the coil) can be affected by external (nearby) magnetism sources, and this may impact the rotor sprocket output. As a result, the mechanical output of analog quartz clock movements may temporarily stop, advance or ...

  3. Antimagnetic watch - Wikipedia

    en.wikipedia.org/wiki/Antimagnetic_watch

    The international standard ISO 764 Horology—Magnetic resistant watches defines the resistance of watches to magnetic fields. According to ISO 764 or its equivalent DIN 8309 (Deutsches Institut für Normung - German Institute for Standardization) a watch must resist exposure to a direct current magnetic field of 4800 A / m .

  4. Quantum logic clock - Wikipedia

    en.wikipedia.org/wiki/Quantum_logic_clock

    A quantum clock is a type of atomic clock with laser cooled single ions confined together in an electromagnetic ion trap. Developed in 2010 by physicists at the U.S. National Institute of Standards and Technology , the clock was 37 times more precise than the then-existing international standard. [ 1 ]

  5. Digital clock - Wikipedia

    en.wikipedia.org/wiki/Digital_clock

    Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24-hour format; in the United States and a few other countries, a commonly used hour sequence option is 12-hour format (with some indication of AM or PM).

  6. List of clock manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_clock_manufacturers

    Lenzkirch Clock Co (Aktiengessellschaft fur Ukrenfabrikation) (1851-1929) factory operated by Junghans 1929-1932; Mauthe Clock Company (c1870 - 1976) Jakob Schlenker Grusen, Schwenningen (JSGUS/ISGUS) (1888–present) Johannes Schlenker, Schwenningen (1822-1883) then Schlenker and Kienzle (1883-1897) then Kienzle

  7. The 30 Most Popular Items on Amazon, According to Our Readers

    www.aol.com/most-popular-items-amazon-according...

    A magnetic wristband is like a third hand during any DIY project. This one has 10 strong magnets that corral things like screws, nails, bolts, and drill bits, making home improvement that much easier.

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