Rack and Snail Striking - (Clocks)

Rack and Snail Striking - (Clocks) Horological term for the system of striking the hours and the quarters invented by Edward Barlow in 1676 and first used by Tompion. It was this system of striking that made repeating clocks possible. One advantage is that the hour hand can be moved round without pausing at every revolution to allow the striking sequence to strike as the `snail' (a cam-shaped disc) moves with the hour wheel.


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