Chronometry

Chronometry

The science of the measurement of time.

2Categories 13194Terms

Add a new term

Contributors in Chronometry

Become a Contributors

Chronometry > Clock

drop octagon wall clock

Chronometry; Clock

The octagon wall clock with a lever movement and an 8in. Dial with brass bezel became popular c. 1850 as a timepiece for traveling by sea or rail. The drop octagon, with pendulum ...

drop dial clock

Chronometry; Clock

Similar to the dial clock but with the addition of a trunk below the dial, allowing a longer pendulum, for better timekeeping, and additional carved decoration. A glass panel is ...

drop case

Chronometry; Clock

Wall clock with a lower case, which usually houses a swinging pendulum such as a Schoolhouse style clock.

drilling

Chronometry; Clock

There are drills for numerous different purposes. Two basic methods are employed when drilling: rotating the drill with the work stationary, or rotating the work with the drill ...

archimedean drill

Chronometry; Clock

A hand tool which gives reciprocating motion to a drill. It consists of a rod with a spiral 'quick' thread, having a handle pivoted at one end and a drill holder or chuck at the ...

drill stock

Chronometry; Clock

A steel arbor fitted with a ferrule, a male center at one end and a drill holder at the other. Available in various sizes, it is rotated for drilling by a bow. Some drill stocks ...

drill box

Chronometry; Clock

A drill holder with a square box-shaped aperture at the end of a drill stock or drilling tool. A screw-nosed drill box has a nut on a tapered slotted nose box by which the nose is ...