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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.

Contributors in Clock

Clock

Turret-clock remontoire

Chronometry; Clock

In most mechanical clocks the source of energy, the weight, drives the escapement through a large step-up gear ratio; thus the impulse the escapement gives to the pendulum at each swing is small. Any ...

Turret-clock striking

Chronometry; Clock

The great majority of turret clocks use count-wheel control in one form or another. Count wheels appear with notches on either the inner or outer side of the ring. Many of the older clocks had ...

Turret-clock weights

Chronometry; Clock

The weights of early turret clocks were of stone, pear-shaped with rough edges smoothed off. A bolt was let into the top, sometimes run in with lead. Many stone weights are still in use, often ...

Zodiac

Chronometry; Clock

The zodiac is a broad band in the heavens, centred on the ecliptic, in which lie all the motions of the sun, moon and major planets. Since the orbits of these are in planes not far removed from the ...

Turret clock

Chronometry; Clock

Turret clocks are large, normally public clocks, housed in church towers, town halls, stable buildings and similar structures. A complete history of European turret-clock development over the ...

Turret-clock escapement

Chronometry; Clock

The earliest turret-clock escapements were of the verge-and-foliot type. There was the occasional variant like the one used by Richard of Wallingford, comprising two wheels on the same axis between ...

Uprighting tool

Chronometry; Clock

A tool by means of which the vertically true position of a pivot hole in a clock plate or part, in relation to a corresponding hole in the opposite plate or part, may be correctly marked or drilled. ...

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