Chronometry

Chronometry

The science of the measurement of time.

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Chronometry > Clock

schoolhouse clock

Chronometry; Clock

Traditional wood cabinet wall clock with a round or octagonal clock case and lower pendulum cabinet. Said to be true Early American Design. This style was most commonly found on ...

scaphe

Chronometry; Clock

A general term applied to all sundials in which the hour lines are engraved on a hollowed-out surface. Sundials of ancient Egypt had their lines marked on flat surfaces, but the ...

piercing saw

Chronometry; Clock

A saw consisting of an adjustable frame with jaws for clamping the ends of a fine, wire-like blade. The frame is adjustable so that blades of different lengths can be fitted, ...

clockmaker's saw

Chronometry; Clock

A frame saw, now called a hacksaw, consisting of a frame and handle and detachable metal-cutting saw blade. Sometimes the blade is held in the frame by the tension of the frame ...

savage two-pin escapement

Chronometry; Clock

An early form of lever escapement, designed by George Savage of Huddersfield, Yorks. , in which the impulse pin is replaced by two pins engaging a wide lever notch. This allows ...

sand glass

Chronometry; Clock

A mechanical instrument for measuring time, depending on the uniform flow of sand or other fine-grained material through a narrow aperture between two glass bulbs. In the simplest ...

Rudd's clock

Chronometry; Clock

A free-pendulum clock made by R. J. Rudd of Croydon, now in the Science Museum, London. A large heavy bob is suspended freely above a fusee clock movement having a small pendulum, ...