3 Terms
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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
Maintaining power
Chronometry; Clock
A mechanism to maintain a clock's drive during the operation of winding. The poor accuracy of pre-pendulum clocks meant that there was little need to keep them going during winding. The Christiaan ...
Mainspring gauge
Chronometry; Clock
A fine gauge similar to a pivot gauge, used for measuring the thickness of mainsprings. Another mainspring gauge is used to measure the height of the spring, and is known as a 'width' or height' ...
Mainspring
Chronometry; Clock
A coiled wire that provides the principal tension or driving power to keep the movement running in a spring-driven clock.
Mains clock
Chronometry; Clock
At one time this term would have been applied to one kind of clock only, the synchronous electric clock. The synchronous electric clock is not strictly a true clock; it has an electric motor ...
Main spring
Chronometry; Clock
The coiled metal ribbon used to drive a clock's mechanism. Originally clocks were all weight-driven, and it is thought that a spiral spring was first used to drive a portable clock early in the 16th ...
Magnetic escapement
Chronometry; Clock
Various arrangements have been tried to silence the tick of a clock, but none so successful as the magnetic escapement, in which energy is transferred from the movement to the pendulum by magnetic ...
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 ...
