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Clockwork
even out the power of the mainspring: the fusee and the stackfreed. The origin of the stackfreed is unknown. It is assumed it was invented in the southern
Stackfreed
Spring used as clockwork power source
the early spring-powered clocks in the 15th century; the stackfreed and the fusee: The stackfreed was an eccentric cam mounted on the mainspring arbor, with
Mainspring
Pulley equalising the mainspring force in timepieces
problem appeared with the first spring driven clocks; the stackfreed and the fusee. The stackfreed, a crude cam compensator, added a lot of friction and was
Fusee_(horology)
Instrument for measuring, keeping or indicating time
constant rate as the spring ran down. This resulted in the invention of the stackfreed and the fusee in the 15th century, and many other innovations, down to
Clock
release of the stored energy, led to the development of two devices, the stackfreed (which although invented in the 15th century can be documented no earlier
History of timekeeping devices
History_of_timekeeping_devices
to do this had appeared in the first clock-watches: the stackfreed and the fusee. The stackfreed, a spring-loaded cam on the mainspring shaft, added a lot
History_of_watches
Time measuring device
why all pre-balance spring watches required fusees (or in a few cases stackfreeds) to equalize the force from the mainspring reaching the escapement, to
Balance_wheel
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