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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
orrery
Chronometry; Clock
This term is usually applied to a small-scale three-dimensional representation of the movements of the heavenly bodies of the solar system, the Earth, moon, planets and their satellites, about the ...
orpheus clock
Chronometry; Clock
A group of nine mid 16th-century table clocks bear decoration in the form of Orpheus charming the beasts with music, and Eurydice and Cerberus at the entrance to Hades. The cases are believed to be ...
ormolu
Chronometry; Clock
Ornamental metalwork made from cast bronze, worked and chased before being gilded. It originated in France in the 17th century for decorating cabinetwork and the cases of clocks.
organ clock
Chronometry; Clock
An unusual form of clock in which the chiming of the hour is preceded or replaced by a short tune played on a miniature pipe organ. The sound made by these clocks is comparable to that of the ...
open escapement
Chronometry; Clock
The wheel and pallet movement that can be seen on some clock dials.
oilstone
Chronometry; Clock
An abrasive stone such as Arkansas, India or Turkey, used with a lubricant for sharpening tools to a fine edge. Fine oil is normally used. Oilstones can be obtained in grades such as fine, medium and ...
oil sink
Chronometry; Clock
The depression surrounding a pivot hole. Early in the 18th century, Henry Sully discovered that a small basin around the pivot hole reduced the tendency for oil to spread across the plate and dry up. ...
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