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

Large ratios may be obtained using a form of helical gearing in which the driving wheel is in the form of a cylindrical screw, cut with a single or multistart thread and meshing at right angles with ...

Year clock

Chronometry; Clock

Clocks with a going duration of a year were produced as early as the second half of the 17th century, but they are very uncommon. They were generally timepieces only, as striking mechanisms to go for ...

Year train

Chronometry; Clock

The problem of providing sufficient power to drive the escapement with the very high gear ratios necessary to make a clock go for a whole year has been successfully overcome by only a few makers. The ...

Zaandam clock

Chronometry; Clock

A clock made between c. 1680 and 1730 in the area around the town of Zaandam in north Holland. The case of the Zaandam clock has an oak back panel, which is almost always outlined in multiple curves, ...

Anti-friction wheel

Chronometry; Clock

A method, found only in very high-quality work, of supporting clock pivots on smooth wheels to reduce friction.

Analogue

Chronometry; Clock

Traditional look of time told by the angular positioning of hands on a dial.

Annealing

Chronometry; Clock

A process of heat treatment for reducing the degree of hardness of metal to give it maximum malleability or ductility. The purpose of annealing is to remove the effects of previous hardening, thus ...