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

wing nut

Chronometry; Clock

Nuts with flattened 'ears', allowing easy adjustment by the fingers. They are sometimes found in place of a knurled rating nut at the lower end of a pendulum.

A steel plate with a range of graduated round holes or slots, accurately gauged to a standard legalized in 1883. Each hole is marked with the standard wire-gauge number, and the equivalent imperial ...

wire line

Chronometry; Clock

Clocks with a longer going time than eight days require heavy weights or strong springs to drive them, and stranded steel-wire lines are often used. Steel lines, however, disfigure the barrel and ...

wolf-tooth gears

Chronometry; Clock

A buttress-shaped gear profile, sometimes used in the winding work of high-class clocks. It is stronger than the normal symmetrical tooth shape, which allows power transmission in both directions.

wooden dial

Chronometry; Clock

Wood as a material for turret-clock dials has been universally used, but for domestic clocks the wooden dial seems to have been limited to clocks made in the Black Forest, other European peasant ...

worm gears

Chronometry; 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 ...