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2. Atmos clock - Wikipedia

   en.wikipedia.org/wiki/Atmos_clock

   The torsion pendulum has a period of precisely one minute; thirty seconds to rotate in one direction and thirty seconds to return to the starting position. This is thirty times slower than the 0.994 m (39.1 in) seconds pendulum typically found in a longcase clock, where each swing (or half-period) takes one second.

3. Electric clock - Wikipedia

   en.wikipedia.org/wiki/Electric_clock

   It was used in precision pendulum clocks, and in automotive clocks until the 1970s. Electromagnetic clocks These keep time with a pendulum or balance wheel, but the pulses to keep it going are not provided by a mechanical movement and escapement linkage, but by magnetic force from an electromagnet . This was the mechanism used in the first ...

4. 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 ...

5. Telechron - Wikipedia

   en.wikipedia.org/wiki/Telechron

   Telechron—now the "Clock and Timer Division" of GE—declined in the 1950s, mainly because batteries had become much more long-lived and reliable. Battery-powered clocks have the obvious advantage of not depending on the proximity of a power outlet, and do not require the often somewhat unattractive electric cable.

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. Gilbert Clock Factory - Wikipedia

   en.wikipedia.org/wiki/Gilbert_Clock_Factory

   The Gilbert Clock Factory is a historic factory complex at 13 Wallens Street in Winsted, Connecticut. Developed between 1871 and 1897, its surviving elements are a preservation of the state's history as a center for the manufacture of low-cost clocks. The company was one of the town's largest employers for many years.