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 presumed-unvarying flow of time is measurable differentially by observing a constant-rate process such as the movement of the sun's shadow on an equatorial sundial, or integratively by counting a ...

Time and strike (T & S) clock

Chronometry; Clock

A clock that both tells the time and strikes or chimes.

Slide-up hood

Chronometry; Clock

The first longcase clocks had hoods which were lifted vertically to gain access to the hands or movement. The slide-up hood moved in wooden grooves on the upper part of the backboard of the case and ...

Slide-off hood

Chronometry; Clock

The most common method of removing the hood of a longcase clock to gain access to the movement. An overlapping strip of wood runs in a groove on either side of the case itself so that the hood does ...

Slave clock

Chronometry; Clock

Any clock which indicates time without possessing its own internal means of measuring time, depending on an external control, may be called a slave clock. The term is usually applied to the ...

Skeleton dial

Chronometry; Clock

A dial cut away to reveal the action of the clock movement behind. Always used in skeleton clocks, it is sometimes also found in high-quality regulators. Turret-clock dials made of cast iron with ...

Simple pendulum

Chronometry; Clock

Scientifically, a theoretical pendulum, the mass of which is all concentrated at its centre of oscillation. The term is also often used to describe a pendulum without any form of temperature ...