Repeater with a chain wound on a cam
AssigneeMontres Breguet S.A.
InventorsChristophe BIFRARE, Alain Zaugg
Life of this patent
Estimating the term…
Abstract
A repeater mechanism includes an hour snail, an hour rack carrying an hour beak and rotatably mounted about an hour axis between a rest position and a read position, an hour spring, which returns the hour rack to its read position, a pulley rotatably mounted about a pulley axis and which forms a spiral-shaped peripheral cam path, a chain able to be wound on the pulley, the chain being hooked on the pulley and on the hour rack, and a return spring coupled to the pulley and via which the pulley pulls the hour rack, via the chain, into its rest position.
Claims7
A repeater mechanism for a striking timepiece, which comprises:
- an hour snail,
- an hour rack carrying an hour beak and rotatably mounted about an hour axis between:
- a rest position in which the hour beak is angularly separated from the hour snail,
- a ‘read’ position in which the hour beak comes into contact with the hour snail,
- an hour spring, which returns the hour rack to the read position,
- a pulley rotatably mounted about a pulley axis,
- a chain able to be partially wound on the pulley, the chain being hooked, by a proximal end, on the pulley and by a distal end on the hour rack,
- a return spring coupled to the pulley, wherein the pulley pulls the hour rack, via the chain, into the rest position,
- wherein the pulley forms a peripheral cam path which extends in a spiral around the pulley axis.
Dependencies are inferred from the claim text.