Fusee - (Clock Watch Part)

TheAntiqueTrade.co.uk Glossary of Antique Terms F

Fusee - (Clock, Watch, Part) A Fusee is a device that equalizes the pull of the mainspring of a clock or watch. If were it not for the fusee, the spring would go too fast when fully wound and too slow when almost unwound, a pulley to which the strain is transferred and whose conical shape transmits a steady pull to the train. Invented in the fifteenth century and still in use in clocks of quality. Leonardo Da Vinci had drawings showing the Fusee in principal.

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