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 form of pulley attached to a tool or part to enable it to be rotated by the cord of a bow or wheel. Ferrules are produced in many forms and sizes, simple ones being small brass pulleys of different ...

False plate dial

Chronometry; Clock

Towards the end of the 18th century the majority of long case clock dials and movements were prefabricated in a number of regional centers, and painted iron dials became popular. The iron dial was ...

False plate

Chronometry; Clock

After 1750 most common long case clocks were made by batch production methods. When large quantities of engraved or painted dials were required it became impractical to specify pillar positions ...

False bob

Chronometry; Clock

The introduction of the pendulum in clock making so revolutionised the timekeeping of clocks that makers found it desirable to show that their clocks were fitted with pendulums. Therefore a small ...

Eyeglass

Chronometry; Clock

An eyeglass is an optical instrument required by the clockmaker to magnify the image of an object and bring it closer to the eye. Eyeglasses may consist of a round, tapered tube fitted with a lens, ...

Eureka clock

Chronometry; Clock

Invented in 1906 by an electrical engineer named T. B. Powers of the United States. The Eureka clock was the first electrically maintained balance-wheel clock. Convinced that he had devised a perfect ...

Declination

Chronometry; Clock

The angular distance of the sun, moon or other heavenly body north or south of the celestial equator. Because of the inclination of the Earth's axis to the plane of its orbit, the sun's declination ...