Operation counter for power take-off clutches associated with wrecker hoisting winches

Claim 1

In a mechanical operation counter for use in association with a cable-controlled, lever-actuated power take-off clutch for controlling the operation of a mechanical device, wherein the lever is movable back and forth by a cable connected with one end of the lever, and the other end of the lever is fixed to an actuating member rotatably journalled in the power take-off clutch housing and extending outwardly of a side wall cover comprising said housing, the improvement comprising a normally open-circuit electrical switch means fixed with respect to said side wall cover and cam means fixed with respect to the pivotal end of the lever for movement in unison therewith about a common rotative axis and operative to momentarily close circuit said switch means upon movement of the lever in one direction or the other by use of the cable, said switch means being a micro-switch having a switch actuating button, and said cam means being in the form of a rotary disc having a plurality of radially-extending lobes adjustably fixed with respect to the lever for selectively placing one of said lobes in actuating position with respect to said switch actuating button.