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

Add a new term

Contributors in Clock

Become a Contributors

Clock

sidereal time

Chronometry; Clock

The sidereal day is the time of one complete revolution of the Earth relative to the first point of Aries, or the spring equinox. This is not quite the same time as one revolution relative to the ...

A resinous substance produced as a protective coating by the lac insect of India. It is available as amall orange flakes which are dissolved in methylated spirit to form a varnish or lacquer, and in ...

shelf clock

Chronometry; Clock

A clock designed to sit on a shelf or mantel.

sheep's-head clock

Chronometry; Clock

A type of lantern clock in which the chapter ring protrudes a considerable distance beyond the normal lantern-clock frame. Although the sheep's-head clock first appeared c. 1700, it only became ...

shears

Chronometry; Clock

Hand shears or snips are used for cutting thin sheet metal. They may be curved or straight, curved ones for cutting small inside curves and straight ones for making straight or curved cuts. Some ...

touch pieces

Chronometry; Clock

Small knobs or points found on medieval and early Renaissance single-handed clocks, for feeling the time in the dark. They were used for weight-driven clock dials and on spring-driven horizontal-dial ...

torsion pendulum

Chronometry; Clock

A form of balance suspended by a thin narrow metal strip. As the balance rotates, the suspension strip is twisted, moving an arm situated near the upper end of the suspension. The arm communicates ...