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US 3,934,404 AGranted
Second hand regulating mechanism
AssigneeKabushiki Kaisha Daini Seikosha
InventorEiichi Matsuura
Life of this patent
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Abstract
A second jumper spring made of a resilient wire is bent at its one end for engaging a fourth wheel or a ratchet-toothed wheel for driving a second hand. The second jumper spring is fixed at the other end on a pin rotatably mounted on a mounting plate which is horizontally movable. The second jumper spring is turnably mounted on the mounting plate and horizontally movable therewith to regulate the fourth wheel or the ratchet-toothed wheel for driving a second hand.
Claims8
In a regulating mechanism for a timepiece second hand:
- a rotary ratchet-toothed wheel rotationally driven during use in a forward rotational direction for driving a timepiece second hand;
- a second jumper spring having an elongated major portion and terminating at one end in a projection which projects generally transversely of said major portion;
- and means mounting said second jumper spring so that said major portion thereof lies in a plane which is generally parallel to and spaced from the plane in which said ratchet-toothed wheel lies and with said projection in direct engagement with the teeth of said ratchettoothed wheel to effectively prevent reverse rotation thereof.
Dependencies are inferred from the claim text.