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

A mechanism to maintain a clock's drive during the operation of winding. The poor accuracy of pre-pendulum clocks meant that there was little need to keep them going during winding. The Christiaan ...

mainspring gauge

Chronometry; Clock

A fine gauge similar to a pivot gauge, used for measuring the thickness of mainsprings. Another mainspring gauge is used to measure the height of the spring, and is known as a 'width' or height' ...

mainspring

Chronometry; Clock

A coiled wire that provides the principal tension or driving power to keep the movement running in a spring-driven clock.

mains clock

Chronometry; Clock

At one time this term would have been applied to one kind of clock only, the synchronous electric clock. The synchronous electric clock is not strictly a true clock; it has an electric motor ...

main spring

Chronometry; Clock

The coiled metal ribbon used to drive a clock's mechanism. Originally clocks were all weight-driven, and it is thought that a spiral spring was first used to drive a portable clock early in the 16th ...

magnetic escapement

Chronometry; Clock

Various arrangements have been tried to silence the tick of a clock, but none so successful as the magnetic escapement, in which energy is transferred from the movement to the pendulum by magnetic ...

lyre clock

Chronometry; Clock

A form of banjo clock with a lyre shape, generally made of mahogany. It frequently has acanthus leaves coarsely carved on the center panel, a base piece below the framed or panelled door and ...