Chronometry

Chronometry

The science of the measurement of time.

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Chronometry > Clock

turret-clock striking

Chronometry; Clock

The great majority of turret clocks use count-wheel control in one form or another. Count wheels appear with notches on either the inner or outer side of the ring. Many of the ...

turret-clock weights

Chronometry; Clock

The weights of early turret clocks were of stone, pear-shaped with rough edges smoothed off. A bolt was let into the top, sometimes run in with lead. Many stone weights are still ...

universal clock

Chronometry; Clock

A clock with multiple dials, which indicates the time in various parts of the world, all the dials being driven in synchronisation from one master-clock movement. The universal ...

universal ring sundial

Chronometry; Clock

A ring dial is for use in a fixed latitude, but the universal ring dial can be used over a wide range of latitudes. It consists of three rings and a strip with slider. A flat ...

universal-time dial

Chronometry; Clock

For some time clockmakers have attempted to show the comparative time in different parts of the world; this became really important after the invention of the electric telegraph. ...

up and down dial

Chronometry; Clock

A subsidiary dial, usually in the twelve o'clock position on a marine chronometer or precision pocket watch, which indicates the degree to which the mainspring is wound at the ...

uprighting tool

Chronometry; Clock

A tool by means of which the vertically true position of a pivot hole in a clock plate or part, in relation to a corresponding hole in the opposite plate or part, may be correctly ...