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

Fly

Chronometry; Clock

The last element in chiming and striking trains, the fly is a fan brake used to control by air resistance the interval between hammer blows.

Flux

Chronometry; Clock

A substance applied to metals which are being brazed or soldered. The flux is designed to help the liquid brazing and soldering metal properly to 'wet' the parent metal or metals being joined by ...

A pin-pallet lever variant which appeared in the 1960s, the floating balance was designed to reduce balance-pivot friction. This was achieved by supporting the weights of the balance assembly by a ...

Flirt

Chronometry; Clock

A weighted or spring-loaded lever which is wound by the going train and released to let off strike work, etc. With a hammer-like blow.

Hague clocks

Chronometry; Clock

The older Hague clocks of the 17th century, of which only a few examples are known, contain a small rectangular movement, controlled by a short pendulum and verge escapement. The movement is attached ...

Gridiron pendulum

Chronometry; Clock

It was apparent to John Harrison that the greatest error to be counteracted in pendulum clocks fitted with a good escapement was that due to expansion or contraction of the pendulum rod in heat or ...

Greenwich time

Chronometry; Clock

Greenwich Mean Time or its modified form, British Summer Time, is the legal standard time of the United Kingdom. Greenwich Royal Observatory was set up in 1675, and one of its main objectives was to ...