Abstract: A combination actuator and guard for palm switches of the type conventionally used to initiate the cycle operation of hydraulic presses and like machines comprising a hand-lever pivotally mounted on a frame that is adapted for mounting on the machine at the cycle control switch position with the lever superimposed on the palm switch and including a slidable latch member on the hand-lever normally spring-loaded to engage stop means on the frame to prevent operation of the hand-lever to actuate the switch but moveable by an actuator at the pivoted edge of the hand-lever to release the stop means and permit manipulation of the hand-lever to actuate the palm switch and initiate the machine cycle.

Abstract: A circuit for simultaneously testing all of the pilot lights or indicator lights on a panel. Each of the pilot lights is associated with a pilot light unit having a transformer and a relay-operated, two-pole switch. Upon the simultaneous introduction of a test current to each of the pilot light units, the relay is energized by the test current to disconnect the pilot light from its normal signal connection and connect the pilot light to receve the test current.