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

George Graham, with his mercurial compensation pendulum, preceded John Harrison by a few years in solving the problem of temperature error caused by the expansion or contraction of the pendulum rod ...

medallion

Chronometry; Clock

An applied circular, oval, or square decorative turning used on a clock case.

mean time

Chronometry; Clock

When all hours and days are of equal time. The average over a whole year of a solar day is termed a 'mean solar day', and a timekeeper divides this as accurately as possible into hours, minutes and ...

matting

Chronometry; Clock

The granular finish given to the center of a brass clock dial, or a type of finish for clock parts. The effect is produced by punching the matted center dial all over with a single or multipointed ...

master clock

Chronometry; Clock

All time distribution systems must have an accurate controlling clock. Carl August Steinheil, who first applied electricity to time distribution, used the term 'central' clock; Alexander Bain later ...

massachusetts shelf clock

Chronometry; Clock

A style of clock frequently called half-clock or box-on-box. The upper portion with dial rested on feet on a separate lower section which contained the pendulum. A similar design developed into the ...