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

calotte

Chronometry; Clock

A modern traveling clock which folds into a leather case; also called a threefold or portfolio clock. Calotte (French for skull cap) properly refers only to the circular metal case of the clock.

calipers

Chronometry; Clock

Pivoted calipers are brass or steel instruments with two pivoted legs adapted to point inwards or outwards accord king to type of need. They are used for taking external or internal comparative ...

The function of a calendar work is to indicate the date, and in some clocks the day and month. A wheel rotating once in 24 hours carries a pin which engages with ratchet teeth on the calendar wheel ...

calendar clock

Chronometry; Clock

Between 1860 and 1875 several patents were granted for mechanisms indicating the day of the week, the day of the month and the month of the year on a seperate dial below the time dial in the same ...

caesium clock

Chronometry; Clock

The first caesium atomic clock was built in 1955 by Dr. Louis Essen and J. V. L. Parry of the National Physical Laborator. Earlier work in the United States had resulted in the National Bureau of ...

calendar aperture

Chronometry; Clock

A slot in a dial which shows the day of the month engraved on a flat ring or annulus, toothed on the inner edge and moved every 24 hours by a pin in a 24-hour wheel geared to the hour wheel.

cadrature

Chronometry; Clock

Another term for motion work, the mechanism lying immediately behind the dial outside the front plate, transmitting the rotation of the movement to the hands. The term may also include parts of the ...