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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Chronometry; Clock

The lever, also termed 'regulator', which alters the effective length of the balance spring in a clock, allowing alterations in the rate to be made by the clock's owner. The best clocks are free ...

inclined plane clock

Chronometry; Clock

These clocks were mostly made in the 17th century. The movement was housed in a drum-shaped canister that rolled down a slope; rewinding was effected by placing the clock at the top of the slope ...

incense clock, japanese

Chronometry; Clock

The Japanese, like the Chinese, used graded joss sticks as the basic method of incense timekeeping; the charge for a geisha's time was in terms of half-hour incense sticks. Incense seals in Japan ...

The most primitive incense clock is a graded incense (joss) stick; the time elapsed is registered by the speed at which the trail of incense is consumed. Powdered incense was formed into a stick of ...

impulse roller

Chronometry; Clock

The steel disc mounted on the balance staff of a lever or chronometer escapement clock and carrying the impulse pin or impulse pallet.

impulse pin

Chronometry; Clock

The ruby pin cemented in the impulse roller mounted on the balance staff in a lever escapement.

impulse pallet

Chronometry; Clock

In clocks with escapements such as the chronometer escapement, where locking and impulse are separated, the pallet receiving impulse is called the 'impulse pallet'. The radially mounted stone in a ...