29 Terms
Home > Industry/Domain > Chronometry > 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
Inverted bell top
Chronometry; Clock
The inverted-bell top for wooden bracket-clock cases appeared about 1715 and is associated with the general introduction of the arch dial. As its name suggest, the shape is that of a bell reversed ...
Digital clock
Chronometry; Clock
Any clock which indicates the time by a display of figures rather than by a dial.
Die
Chronometry; Clock
One kind of die is a tool used for cutting a thread on a rod. It usually takes the form of a disc of tool steel, with a centre hole and two or more radially disposed holes which break into the ...
Diamantine
Chronometry; Clock
A white powder prepared from boron, processed to obtain the utmost purity. It is normally obtainable in three grades and used with a little oil for finishing and polishing steel. The coarsest grade, ...
Dial feet
Chronometry; Clock
Clock dials are attached to the front plate of the movement by means of short cylindrical pillars, which are riveted to the dial so that they cannot be seen from the front. They are usually sited so ...
Dial clock
Chronometry; Clock
During the latter half of the 18th century the English dial clock appeared, a descendant of the so-called 'Act of Parliament' or 'tavern' clock. Originally timekeepers only, consisting of a large ...
Detent
Chronometry; Clock
A catch which is moved into the path of a wheel. In the Harrison maintaining power, the detent is the pawl which is pivoted to the plates and engages the maintaining-power ratchet; in the detent ...
