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

Pinion wire

Chronometry; Clock

The basic material from which steel or brass pinions are made for small clocks, brass pinions sometimes being used in clock motion work. The pinion wire is produced by drawing wire through ...

The flutes and leaves of a pinion are polished in a pinion polishing tool; it consists of a frame in which the pinion is mounted between centres and free to rotate. The frame is fitted to slide on a ...

Pinion gauge

Chronometry; Clock

A gauge similar to a slide gauge, used to measure the distance between the plates of a clock or the length of a pinion from shoulder to shoulder, showing both measurements at the same time. The name ...

Japanese lantern clock

Chronometry; Clock

Lantern clocks were the first type produced by the Japanese to imitate European clocks. Other styles of clocks were developed, but the lantern remained the standard for large clocks until 1873. The ...

Japanese bell clock

Chronometry; Clock

Sometimes they were hung over a pond to see the reflection of the dial

Jackwork

Chronometry; Clock

Jackwork comprising one or more horizontally rotating wheels or platforms carrying puppets which circulate around a vertical axis. They are used for displaying written time announcements in mediaeval ...

Italian hours

Chronometry; Clock

In Italy from the 14th to the 18th centuries a system of time reckoning was used in which the whole 2 X 12-hour period was numbered 1 - 24 in a succession of equal hours starting from zero half an ...