Chronometry

Chronometry

The science of the measurement of time.

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Chronometry > Clock

crystal

Chronometry; Clock

Flat or convex piece of glass that covers the dial. Usually fitted into a brass bezel.

crescent sundial

Chronometry; Clock

A modified form of universal-ring dial in which the ring is divided into two equal semicircular portions placed back to back. The division is made at the '12' marks, so that the ...

coup-perdu escapement

Chronometry; Clock

This escapement is sometimes found in high-quality French clocks; it enables a seconds hand to jump full seconds with a pendulum which beats half-seconds. This is usually achieved ...

contrate wheel

Chronometry; Clock

A wheel cut with teeth on one face which mesh with a pinion at 90? used in verge clocks to drive the vertical escape pinion. The contrate wheel is also found in platform-escapement ...

cornice

Chronometry; Clock

Topmost molding of a clock case. The 833-W is a great example of a well-defined cornice.

constant-force escapement

Chronometry; Clock

Also known as 'remontoire escapement', and having many differing designs. These escapements achieve a uniform impulse by the use of the driving force to wind an auxiliary spring ...

conical pendulum

Chronometry; Clock

A pendulum with a bob describing a horizontal circle, used in some Victorian novelty clocks and also to control the driving mechanism of equatorially mounted telescopes. The ...