Electrically operated time switch clock

Claim 1

IN AN ELECTRIC TIMER HAVING A MOTOR DRIVEN PERIOD CAM DISC FOR COOPERATION WITH ACTUATING ARMS OF ELECTRICAL SWITCHES, A PERIOD CAM DISC COMPRISING A MAIN DISC PORTION HAVING AN AXIS THERETHROUGH, A DRIVE GEAR ATTACHED TO ONE FACE OF SAID MAIN DISC WITH ITS AXIS IN ALIGNMENT WITH THAT OF THE MAIN DISC, A SERIES OF CONCENTRICALLY ARRANGED ARCUATE CAM SLOTS IN SAID MAIN DISC DISPOSED AT VARYING RADIAL DISTANCES FROM THE CENTER OF SAID MAIN DISC, A CENTRAL CIRCULAR HUB EXTENDING TRANSVERSELY FROM THE OTHER FACE OF SAID MAIN DISC, A POSITIONABLE CAM SLOT SECTOR PIECE MOUNTED FOR MOVEMENT ON SAID OTHER FACE OF SAID MAIN DISC AND HAVING AN INNER ARCUATE PORTION SLIDABLY ABUTTING AGAINST AN ADJACENT PERIPHERAL CIRCULAR PORTION OF SAID HUB AND A TRANSVERSELY EXTENDING PORTION THEREON SLIDABLY RECEIVED IN ONE OF SAID ARCUATE CAM SLOTS, SAID SECTOR PIECE HAVING MEANS THEREON FOR HOLDING THE SAME ADJUSTABLY POSITIONED ON SAID MAIN DISC WHEREBY THE EFFECTIVE LENGTH OF THE SLOT WITH WHICH IT COOPERATES MAY BE VARIED.