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  2. Torsion pendulum clock - Wikipedia

    en.wikipedia.org/wiki/Torsion_pendulum_clock

    A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...

  3. List of clock manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_clock_manufacturers

    Hermle Clocks (1922–present) Junghans, Schramberg (1861–present) Kieninger Clock Company, initially in Mönchweiler, 1921 new factory in Aldingen (1912–present) Kieninger & Obergfell Uhrenfabrik (KUNDO trademark), Sankt Georgen (1918 - recent) Kienzle Uhren, Schwenningen - Schlenker and Keinzle until c1897 (1883-1996) Franz Ketterer

  4. Pendulum clock - Wikipedia

    en.wikipedia.org/wiki/Pendulum_clock

    A torsion pendulum clock requiring only annual winding is sometimes called a "400-Day clock" or "anniversary clock", sometimes given as a wedding gift. Torsion pendulums are also used in "perpetual" clocks which do not need winding, as their mainspring is kept wound by changes in atmospheric temperature and pressure with a bellows arrangement.

  5. Kundo (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Kundo_(disambiguation)

    Kundo may refer to: A German manufacturer of torsion pendulum clocks in the early 20th century; Kundo: Age of the Rampant, a 2014 South Korean film; Kundō Koyama, a Japanese writer; Kundo, a deity in the fictional World of Greyhawk

  6. Clock recovery - Wikipedia

    en.wikipedia.org/wiki/Clock_recovery

    Clock recovery is very closely related to the problem of carrier recovery, which is the process of re-creating a phase-locked version of the carrier when a suppressed carrier modulation scheme is used. These problems were first addressed in a 1956 paper, which introduced a clock-recovery method now known as the Costas loop. [3]

  7. Complication (horology) - Wikipedia

    en.wikipedia.org/wiki/Complication_(horology)

    The Star Caliber 2000 has 21 complications. They include sunrise and sunset times and the lunar orbit, and it is capable of playing the melody of Westminster quarters (from Big Ben, the clock tower of the Houses of Parliament in London). The Franck Muller Aeternitas Mega 4 is the world's most complicated wristwatch. It has 36 complications, 25 ...

  8. Clock angle problem - Wikipedia

    en.wikipedia.org/wiki/Clock_angle_problem

    The time is usually based on a 12-hour clock. A method to solve such problems is to consider the rate of change of the angle in degrees per minute. The hour hand of a normal 12-hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute. [1]

  9. Blinking twelve problem - Wikipedia

    en.wikipedia.org/wiki/Blinking_twelve_problem

    In software design, the blinking twelve problem [1] is when features in software or computer systems are rendered unusable to most users by the complexity of the interface to them. The usage emanates from the 'clock' feature provided on many VCRs manufactured in the late 1980s or early 1990s. The clock could be set by using a combination of ...