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

Add a new term

Contributors in Clock

Become a Contributors

Clock

dial clock

Chronometry; Clock

During the latter half of the 18th century the English dial clock appeared, a descendant of the so-called 'Act of Parliament' or 'tavern' clock. Originally timekeepers only, consisting of a large ...

detent

Chronometry; Clock

A catch which is moved into the path of a wheel. In the Harrison maintaining power, the detent is the pawl which is pivoted to the plates and engages the maintaining-power ratchet; in the detent ...

dial

Chronometry; Clock

The face of a clock on which the hours are located.

This escapement, which has finally ousted all others in mechanical balance-controlled timekeepers, was first invented in the mid 18th century, although its merits were not fully appreciated until the ...

depthing tool

Chronometry; Clock

A tool to determine the correct distance apart and depth of engagement of wheel teeth and pinions. It has a pair of parallel runners between the centers of which two wheels, or wheel and pinion, or ...

declination

Chronometry; Clock

The angular distance of the sun, moon or other heavenly body north or south of the celestial equator. Because of the inclination of the Earth's axis to the plane of its orbit, the sun's declination ...

decimal clock

Chronometry; Clock

In France in 1793, the Revolutionary government ordered decimalisation of the systems of measurement, including time. The new time, which divided the days into ten hours, the hours into 100 minutes ...