You're viewing this item in the new Europeana website. View this item in the original Europeana.

RATCHET-TYPE SPEED GOVERNOR MECHANISM OF CLOCKWORK WITH A FRICTIONAL-REST ESCAPEMENT

A clockwise torque is applied through pinion 2 to escape wheel 1 which is rigidly mounted on shaft A. Balance wheel 3 oscillates with a period that is regulated by lever 4 and two pins a between which the external turn of hairspring 5 passes. Hollow balance staff 5 has a notch whose edges form the engaging and disengaging pallets. At each swing of balance wheel 3, a tooth of escape wheel 1, engagiā€¦