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

Vernier gauge

Chronometry; Clock

Many measuring instruments are fittd with a vernier, a subsidiary scale for making subdivisions of the main measuring scale. For subdividing a main scale in units of ten the vernier has ten equal ...

Balloon clock

Chronometry; Clock

Mantel or tabletop clocks shaped like hot-air balloons of the late 18th Century.

Banjo clock

Chronometry; Clock

This term is believed to have been introduced early in the 20th century to describe American wall clocks of similar appearance to that originally developed by Simon Willard at Roxbury, Massachusetts.

Introduced in the last quarter of the 17th century, this device improved the accuracy of balance-control timekeepers from 15 minutes per day to within two minutes per day. Early balance springs had ...

Bain's clock

Chronometry; Clock

Alexander Bain (1810-1877) produced the first electromagnetically operated pendulum clock in 1842. This step lead to the awesome accuracy of the atomic clock. Bain was first interested in signalling ...

Balance

Chronometry; Clock

The oscillating wheel which controls the speed of an escapement, generally used in a portable timekeeper. The time taken for an oscillation of a balance depends upon its mass, the radius of gyration ...

Automatic winding

Chronometry; Clock

A mechanism for winding a clock automatically at regular intervals. Large turret clocks require a great deal of effort to wind manually, and are increasingly being converted to automatic winding. In ...