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

The bow is used to impart reciprocating motion to work in the turns, to the spindle mandril of a lathe, to a drill or drill stock, or to an arbor, by coiling the line of the bow once around a pulley ...

Drill arbour

Chronometry; Clock

A spear-shaped tool or flat drill having cutting edges on the flattened end, a male centre at the other end and a pulley, or ferrule, on its elongated shank. It is rotated for drilling by the use of ...

Dwarf tall clock

Chronometry; Clock

This anomalous title describes a miniature American tall, or long case clock, more popularly known as a grandmother clock. Although made in small numbers by comparison with tall clocks, they were ...

Dutch striking

Chronometry; Clock

Early Dutch clocks sometimes use a striking system in which the hour is struck on a large low-pitched bell and at the half-hour the succeeding hour is struck on a small high-pitched bell. The Dutch ...

Duplex escapement

Chronometry; Clock

A type of frictional rest escapement, utilising an escape wheel with two sets of teeth, one for locking and the other for impulsing. It is normally used only in watches, though occasionally occurring ...

Japanese drum table clock

Chronometry; Clock

Adaptations of European table clocks, they were not modelled after an oriental drum on a stand nor displayed vertically, and are therefore called table clocks. Almost all such clocks are from a late ...

Chinese drum clock

Chronometry; Clock

Truly Chinese, such clocks are in the form of an oriental drum, designed to be supported vertically on a stand. The cases are pierced engraved chased brass cylinders of varying diameters, all about ...