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

A simple proportional measuring gauge consisting of two straight brass or steel arms, pivot-jointed at one end to form an adjustable gap gauge which is set to the required size (or gap) by a slotted ...

Seconds train

Chronometry; Clock

A clock train suitable for a seconds-beating pendulum or, alternatively, for driving a hand indicating seconds.

Sand glass

Chronometry; Clock

A mechanical instrument for measuring time, depending on the uniform flow of sand or other fine-grained material through a narrow aperture between two glass bulbs. In the simplest and commonest form ...

Rudd's clock

Chronometry; Clock

A free-pendulum clock made by R. J. Rudd of Croydon, now in the Science Museum, London. A large heavy bob is suspended freely above a fusee clock movement having a small pendulum, used as a slave ...

Royal pendulum

Chronometry; Clock

The verge escapement, being virtually the only one known when the pendulum was introduced, calls for a large pendulum arc, unless gearing is introduced between the escapement and pendulum, or the ...

Rounding-up tool

Chronometry; Clock

An ingenious tool or engine for re-cutting or re-shaping wheel teeth. It is also sometimes called a 'topping tool', and with it a wheel can be reduced in diameter or corrected if not perfectly round, ...

Round gothic clock

Chronometry; Clock

The earliest form of American Gothic case design was conceived by Elias Ingraham at Bristol, Connecticut, c. 1840. Subsequently copied and made in large quantities by other firms, it was usually ...