Clamp for lock key duplicating machine
AssigneeSilca S.P.A.
InventorBianchi Camillo
Life of this patent
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Abstract
A clamp for duplicating machines for lock keys comprising a pair of jaws (1,1',2,2') which are mounted on a threaded pin (4) rigid with a clamp support carriage (3), means for approaching said two jaws (1,1', 2,2') when clamping the key, and elastic means (8,6) interposed between said two jaws (1,1', 2,2') to keep them spaced apart. The clamp comprises, in a position misaligned with the line of action of the applied clamping force and at the opposite side with repect to the gripping faces of the jaws (1,1', 2,2'), a projecting portion causing, during the clamping stage, a moment opposite to the reaction moment caused by the clamped key.
Claims8
A clamp for lock key duplicating machines comprising
- a clamp support carriage,
- a theaded pin rigid with the carriage and extending therefrom,
- a pair of jaws mounted upon said pin,
- means for drawing the two jaws together and to clamp a key therebetween said means applying clamping force along a line of action,
- elastic means interposed between the two jaws to bias them apart, and
- one of said jaws having a projecting portion in a position misaligned with said line of action and offset therefrom in a direction away from the gripping faces of the jaws thereby to create a moment opposite to the reaction moment produced by the clamped key,
- characterized in that the projecting portion consists of an appendix (6) provided on one jaw (2) and which is received within a corresponding recess (5) provided on the other jaw (1), the depth of the recess (5) at the corresponding faces on the side comprising the rib (12) being greater than the difference in height between the appendix (6) and the rib (12), and the depth of the recess (5) at the corresponding faces on the side not comprising the rib (12) being less than the height of the appendix (6).
Dependencies are inferred from the claim text.