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

Cross-beat escapement

Chronometry; Clock

This 16th-century escapement was an early attempt to improve on the verge. The friction caused by the necessity of coupling the two pallet staffs by gearing or cranks must reduce the performance ...

Crown wheel

Chronometry; Clock

The verge escape wheel, so named because of its resemblance to a crown.

Crystal

Chronometry; Clock

Flat or convex piece of glass that covers the dial. Usually fitted into a brass bezel.

A modified form of universal-ring dial in which the ring is divided into two equal semicircular portions placed back to back. The division is made at the '12' marks, so that the semicircles face due ...

Coup-perdu escapement

Chronometry; Clock

This escapement is sometimes found in high-quality French clocks; it enables a seconds hand to jump full seconds with a pendulum which beats half-seconds. This is usually achieved by a form of ...

Brazing

Chronometry; Clock

A method of bonding metallic surfaces with a more fusible metal or alloy. Unlike welding, in which the metals being joined are themselves most often melted together, brazing makes use of a bonding or ...

Brass weights

Chronometry; Clock

The best clocks have brass-cased driving weights. Clock weight design may be used as a guide to the date of manufacture of a clock. However, dealers and repairers frequently interchanged weights ...