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

In clockmaking certain parts such as metal plates are sometimes fastened together with rivets, which are pins or pegs generally of the same metal as the parts being joined, with a head of suitable ...

Ring sundial

Chronometry; Clock

An altitude sundial in which the time is shown by light rays passing through a small hole in a ring, giving a spot of light on a set of hour lines on the inner surface of the ring. Such dials are ...

torsion pendulum

Chronometry; Clock

A form of balance suspended by a thin narrow metal strip. As the balance rotates, the suspension strip is twisted, moving an arm situated near the upper end of the suspension. The arm communicates ...