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

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 signaling ...

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 ...

burnishers

Chronometry; Clock

A hand tool, generally a length of hardened steel, shaped and sized according to need, with a highly polished surface to burnish or polish metal to a smooth bright finish. Burnishers may be straight ...

burl

Chronometry; Clock

Decorative pattern in the wood grain caused by a series of irregularities that add to the character of the wood.

bulle electric clock

Chronometry; Clock

The basic operating principle of the Bulle Clock, invented in the early 1900s by M. T. Favre-Bulle is identical to that of Alexander Bain's invented some 80 years earlier. Bain's sliding-bar contact ...