Clock

Clock

Any instrument other than a watch for measuring or indicating time, especially a mechanical or electronic device having a numbered dial and moving hands or a digital display.

Industry: Chronometry

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Clock

The name comes from the fact that when it was first invented, it needed winding just once a year on its anniversary (approximately 400 days). characterised by a glass dome and a rotating pendulum. ...

Anti-friction roller

Chronometry; Clock

A type of bearing in which two or more rollers are used to carry a pivot. Anti-friction rollers used in clocks take the form of pivoted wheels without teeth, arranged in different planes with the ...

American regulator

Chronometry; Clock

About 1870 the term 'regulator' was employed by American clock manufacturers advertising spring-driven (without fusees) recoil escapement, non-temperature-compensating pendulum wall clocks. ...

Winding key

Chronometry; Clock

The tool for winding a clock. Crank keys are best suited for weight clocks and eight-day fusee clocks, while the plate key is best suited to going-barrel spring clocks and clocks requiring a high ...

Wing nut

Chronometry; Clock

Nuts with flattened 'ears', allowing easy adjustment by the fingers. They are sometimes found in place of a knurled rating nut at the lower end of a pendulum.

Wire gauge

Chronometry; Clock

A steel plate with a range of graduated round holes or slots, accurately gauged to a standard legalised in 1883. Each hole is marked with the standard wire-gauge number, and the equivalent imperial ...

Wire line

Chronometry; Clock

Clocks with a longer going time than eight days require heavy weights or strong springs to drive them, and stranded steel-wire lines are often used. Steel lines, however, disfigure the barrel and ...