US PATENT SUBCLASS 234 / 110
.~ By immobilizing a portion of an element in tool drive train


Current as of: June, 1999
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234 /   HD   SELECTIVE CUTTING (E.G., PUNCHING)

109  DF  WITH SPECIFIC MEANS TO SELECT A SINGLE TOOL {3}
110.~ By immobilizing a portion of an element in tool drive train


DEFINITION

Classification: 234/110

(under subclass 109) Device wherein the tool pair and its actuating power train are permanently connected by actuating linkage having a portion which normally has idling motion rendering the linkage ineffective to transmit power to the tool, and wherein the conditioning mechanism comprises an element movable into blocking engagement with said portion to furnish a fulcrum therefor, whereby said linkage is made effective to actuate said tool.

(1) Note. Fig. 22 illustrates basic mechanism of this subclass. A continuously rotating crankshaft carries a crankpin which is slidable in a longitudinal slot in the actuating lever. The lever is restrained against longitudinal movement by suitable guides, not shown, so that it oscillates idly in a vertical plane during the normal or retracted condition of the latch. Depression of key K projects the latch into the path of idle movement of the lever, constraining the latter to pivot about the latch as a fulcrum and thus to drive tool T downwardly upon each rotation of the crankshaft. [figure] [caption]Fig. 22Typical Mechanism of subclass 110.