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

Bluing

Chronometry; Clock

The process of changing the colour of polished steel by heating to give a protective film of oxidation which also has a pleasing color, brown, purple and blue. The bluing of clock components is ...

A long tapered metal tube through which air is blown by mouth or bellows to increase the heat of a flame and to direct it on to the point where it is needed when brazing or soldering. The blast from ...

Blinking-eye clocks

Chronometry; Clock

Soon after the iron-front case pendulum shelf clocks had been introduced in the United States, a series of one-day lever movement timepieces cased in cast-iron figures appeared. The earliest of these ...

Black forest clock

Chronometry; Clock

The Black Forest in south-west Germany embraces the biggest centre of clock making in the world. The industry began because of the need for local farmers to adopt some indoor occupation during the ...

Birdcage clock

Chronometry; Clock

An ornamental clock constructed in the form of a birdcage containing a mechanical singing bird. The clock movement is in the lower part of the cage and its dial is seen from below when it is hanging ...

Equation of time

Chronometry; Clock

The difference between apparent solar time, i.e. The time shown by a clock running uniformly throughout the year. The difference arises from two factors in the Earth's orbital motion around the sun ...

Equation dial

Chronometry; Clock

A rare form of auxiliary dial which indicates the difference between solar and mean or average time. Most early long case clocks were sold together with a sundial which was an essential adjunct to ...