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STACKFREED

Stackfreed

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

Mainspring

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

Fusee (horology)

Mainspring force equalizing pulley 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)

Fusee_(horology)

History of watches

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

History_of_watches

Clock

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

History of timekeeping devices

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

Balance wheel

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