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

Observatory clock

Chronometry; Clock

A clock of great precision used for the study of astronomical phenomena, also for rating other precision timekeepers such as marine chronometers and deck watches.

Reverse painting

Chronometry; Clock

A picture or design often used on a clock tablet and painted on the back side of a glass in reverse order of a normal painting.

The reaction of engagement of the great wheel with its pinion is transmitted to its pivot and, in the usual layout, the pull of the fusee line adds to this load. In the alternative layout, the chain ...

Rete

Chronometry; Clock

The rotatable circular star map of an astrolabe, in the form of a network of pierced and engraved metal.

Frosting

Chronometry; Clock

The granular or matted finish given to the surface of brass clock parts prior to gilding. It is produced by dipping the parts briefly into a concentrated mixture of nitric and hydrochloric acid, ...

Orrery

Chronometry; Clock

This term is usually applied to a small-scale three-dimensional representation of the movements of the heavenly bodies of the solar system, the Earth, moon, planets and their satellites, about the ...

Orpheus clock

Chronometry; Clock

A group of nine mid 16th-century table clocks bear decoration in the form of Orpheus charming the beasts with music, and Eurydice and Cerberus at the entrance to Hades. The cases are believed to be ...