Home ~ Items For Sale ~ Comitti of London ~ Comitti Skeleton Clocks

Comitti Skeleton Clocks

The Grasshopper Clock

The Grasshopper Clock

H.17" (43CM) W.11.5" (29.5CM) D.8.25 (21CM)

The Grasshopper Clock is based on the 'escapement' invented by the famous clock maker John Harrison (1693-1776). Harrison made the first marine chronomter that made it possible for seafarers to calculate their longitude position by observing the stars. This enabled them to compare the angle of their postion with the known angle at a given time in Greenwich, London.Examples of his work are exhibited at The Old Royal Observatory.The pendulums are inter-linked so that any motion to one would be compensated for by that same effect on the other. This was particularly important for the operation of such a clock subject to motion, for example the roll of a ship.The 8 day movement is fusee-driven,gold plated and protected by a Glass cover.The dials are etched and Silver plated.The seconds are inticated by the 180' scale above the dial

Very Limited availabity

£5295.00  G.B. Pounds
The "Congreve" Rolling Ball Clock

The "Congreve" Rolling Ball Clock

A favorite of clock collectors, the Rolling Ball Clock was invented by the scientist Sir William Congreve and Patented in 1808. The concept of the clock reflects the aspiration of clockmakers to find an alternative to the pendulum as the escapement regulator.Regulation is achieved by the traverse of a ball along the zig zag grooves on an inclined plane.The ball trips the escapement at the end of each traverse reversing the slope of the platform.The principle of the clock is such that the accuracy of the time keeping is limited +/- 3 minutes per day.This is not a reflection of the qualityof manufacture but the fact that the temperature changes,dust on the track and even static electricity give rise to variations. The eight day movement is fusee-driven,gold plated and protected by a glass cover. the dials are etched and silver plated.

Availability Limited

£ P.O.A  G B Pounds