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Chronometry
The science of the measurement of time.
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Chronometry > Clock 
Vienna Empire clock
Chronometry; Clock
A term loosely applied to clocks made in Vienna in the early 19th century which were influenced by the French style. Arabic figures were often used on clocks of this type.
Vienna regulator
Chronometry; Clock
The Vienna regulator resulted from attempts to produce a smaller precision clock than the longcase clocks existing at the end of the 18th century, while retaining the advantages ...
volvelle
Chronometry; Clock
A simple calculator or reckoner, involving a rotating disc or discs, usually fitted as an accessory to a portable sundial or astronomical compendium. Each disc usually carries a ...
wagon spring
Chronometry; Clock
A series of flat springs, attributed to Joseph Ives of Bristol, Connecticut, used instead of a coil spring to power a clock movement.
wandering hour dial
Chronometry; Clock
Normally associated with certain watches of the late 17th and early 18th centuries, though a few such dials were made for both longcase and bracket clocks. These were night ...
warning piece
Chronometry; Clock
A projection on the lifting piece of a striking clock which intercepts a pin in the warning wheel and holds the striking train ready until the exact hour of striking.
warning wheel
Chronometry; Clock
Usually the penultimate wheel in a striking train, carrying a pin which locks the striking train after release, until the lifting piece falls at the hour and the clock strikes.
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