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

Planetary clock

Chronometry; Clock

It has been suggested that such clocks were originally devised to provide a driving mechanism for models showing the planetary system, and that telling the hours of the day was a secondary ...

Planetarium

Chronometry; Clock

A mechanically operated device in which the revolutions of the Earth and the other planets around the sun are represented on a dial or dials; they may be hand-operated or clock-driven. Richard of ...

The positions of the equinoxes are determined by the position of the Earth's axis, and if this was constant in direction the equinoxes would remain fixed in position in relation to the fixed stars. ...

Precession of equinoxes

Chronometry; Clock

Potence

Chronometry; Clock

A bracket or cock mounted between the clock plates. In a verge clock the potence is the bracket carrying the lower escape-wheel pivot.

Postman's alarm

Chronometry; Clock

The Black Forest industry was hard hit by American competition in the years 1842-60 and in the 1860s began to make clocks on the American pattern in factories. The old type of wall striking clock, ...

Portico clock

Chronometry; Clock

A portico is a classical porch with a decorated entablature supported on columns, and often completed by a triangular pediment. On modern buildings in classical style, the pediment sometimes contains ...