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

The bow is used to impart reciprocating motion to work in the turns, to the spindle mandril of a lathe, to a drill or drill stock, or to an arbor, by coiling the line of the bow once around a pulley ...

drill arbor

Chronometry; Clock

A spear-shaped tool or flat drill having cutting edges on the flattened end, a male center at the other end and a pulley, or ferrule, on its elongated shank. It is rotated for drilling by the use of ...

dolphin fret

Chronometry; Clock

The figures of a grotesquely shaped, scaly fish with a large head and curved tail standing high above it, was a favorite motif in baroque decoration. Legs of tables and arms of chairs were frequently ...

Chinese divination boards

Chronometry; Clock

Divination boards were fairly common in China. They consisted of a round disc, of various diameters, usually of wood either lacquered or varnished. In the center was a magnetic compass, and around ...

dividing plate

Chronometry; Clock

A flat circular plate fitted to a wheel- or pinion-cutting machine, or to a lathe spindle or dividing accessory for a lathe or other machine. On the plate a number of concentric circles are marked, ...

dividing

Chronometry; Clock

This term refers to dividing the length, diameter or circumference of circles as required, by means of dividers or dividing plate, or by other means. Clockmakers use dividing plates to produce ...

dividers

Chronometry; Clock

Dividers, or measuring compasses, differ little from compasses exept that they are spring-hinged and are adjusted by a knurled nut and screw for fine measurement. They are used for taking comparative ...