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

A method for giving specific shape to metal parts with revolving cutting tools, mostly known as milling cutters. It is faster than other methods of shaping. Although milling cutters may be used in a ...

Micrometre gauge

Chronometry; Clock

A type of gauge for accurate measurement of small parts to thousandths of an inch, obtained by turning a precision, fine-pitched, threaded screw a known number of revolutions, or parts thereof, from ...

Sharp gothic clock

Chronometry; Clock

An American case style, designed by Elias Ingraham c. 1843 for use with spring-driven movements, and first produced by Brewster & Ingrahams, probably for the English export market. The design was ...

Sextant

Chronometry; Clock

A modification of John Hadley's octant made by Captain John Campbell c. 1771. Whereas the octant is in the form of a sector comprising one-eighth of a circle, the sextant occupies one-sixth of a ...

Set-up

Chronometry; Clock

When a fusee clock is being assembled and the line or chain is wound on the barrel, the mainspring is pre-tensioned by winding the mainspring arbor, usually one half to one and a half turns, enabling ...

Self-centering chuck

Chronometry; Clock

A useful chuck adaptable to many sizes of work. It has three or more radial jaws which close together on the work held by means of a screw or scroll inside the chuck, in such a way as to centre the ...

Sedan clock

Chronometry; Clock

The name given to small clocks which are traditionally associated with the 18th-century sedan chair, though there is no direct evidence that they were used exclusively for this type of conveyance, if ...