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

Invented by John C. Briggs and patented in 1855. Many such clocks were made by the E. N. Welch Manufacturing Co. In the 1870s. The clock has a conical pendulum as the timekeeping element, a device ...

bretteluhr

Chronometry; Clock

Meaning, 'board clocks' they date from the Biedermeier period in Austria, and were cheap clocks and popular with people of limited incomes. Bretteluhren occur with both weight- and spring-driven ...

bridge

Chronometry; Clock

A bracket with two feet commonly used to support the pivot of an arbor outside the plates of a clock.

breastplate

Chronometry; Clock

A curved plate or disc which is held against the body to support the pivoted end of a drill. Steady pressure can thus be applied to the drill while the breast plate is held on a cord hung around the ...

break-arch dial

Chronometry; Clock

An early form of arch dial: the top of the main, square dial is surmounted by a semicircular arch, slightly smaller in diameter than the width of the dial, leaving a small step or break at the base ...

break arch

Chronometry; Clock

A type of top for bracket clocks and long case clocks which appeared about 1765 and is characteristic of the style of George Hepplewhite. The arch is incomplete, having a small ledge or step where it ...

brazing

Chronometry; Clock

A method of bonding metallic surfaces with a more fusible metal or alloy. Unlike welding, in which the metals being joined are themselves most often melted together, brazing makes use of a bonding or ...