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

Butterfield sundial

Chronometry; Clock

A form of adjustable sundial invented by Michael Butterfield, an English instrument maker who is known to have worked in Paris between 1678 and 1680. The Butterfield sundial is a small, portable ...

Cable driven

Chronometry; Clock

Mechanical movement powered by weights hanging on cables wound with a key or crank.

The remedy for a worn pivot hole, bushing provides it with a new bearing surface. The worn hole is opened further to round it up and to bring it to its original center. The new brass bush has a fine ...

Burnishing

Chronometry; Clock

Bringing the surface of metal to a brilliant finish by friction, the action slightly compressing and hardening the metal surface but removing no metal. The metal surface to be burnished is first ...

Basket top

Chronometry; Clock

A shaped top to the cases of verge bracket clocks of the late 17th and early 18th centuries. In its simpler form it consisted of a rectangle of mitered ovolo mouldings veneered with ebony or ebonised ...

Battery

Chronometry; Clock

When a number of electrical cells are connected together in a series or parallel arrangement, they are collectively known as a battery. This term is also frequently applied to a single cell.

Battery clock

Chronometry; Clock

Alexander Bain designed the first battery clock shortly before 1838. Today the term is applied to portable electric clocks which depend on a dry cell or battery for its electrical power. The older ...