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

Usually found in the arch of bracket clocks but also in some longcase clocks. Bracket clocks with verge movements were portable, and the owner, on retiring to bed, could take his bracket clock with ...

Straight sided

Chronometry; Clock

A style of clock cabinet in the same width from crown to base.

Stopwork fusee

Chronometry; Clock

A mechanism used to prevent the line or chain being torn from the mainspring barrel in fusee clocks. The stopwork acts when a hinged arm is moved by the line or chain into the path of the hook formed ...

Right ascension

Chronometry; Clock

The angle between the plane containing any celestial body and passing through the poles, and a similar plane passing through the point of the spring equinox, measured in an easterly direction when ...

Riefler escapement

Chronometry; Clock

The development of escapements has aimed at reducing interference to the pendulum by the movement. Earlier this century, Sigmund Riefler produced a clock the pendulum of which is maintained by ...

Riefler clock

Chronometry; Clock

Sigmund Riefler of Munich became the most famous maker of regulator clocks for observatory use, continually striving for perfection of timekeeping. He invented a mercury-in-steel pendulum with ...

Rhomboid pendulum

Chronometry; Clock

A form of pendulum sometimes seen on turret clocks, though rarely on domestic clocks, in which the rod takes the form of a diamond-shaped frame composed of four steel strips connected horizontally ...