Photoconductive time delay device

Claim 1

A PHOTOCONDUCTIVE CONTROL DEVICE COMPRISING AN ELECTRICAL CIRCUIT INCLUDING A SOURCE OF POWER, A MOTOR, AND A PHOTOCONDUCTIVE CELL CONNECTED IN SERIES WITH SAID MOTOR, SAID CELL BEING ADAPTED TO VARY RESISTANCE IN SAID CIRCUIT IN ACCORDANCE WITH CHANGES IN LIGHT INTENSITY, AN ARM DRIVABLY CONNECTED TO SAID MOTOR AND ROTATABLE THEREBY IN ONE DIRECTION ONLY, A STOP MEANS ADAPTED TO LIMIT ROTATION OF SAID ARM IN A DIRECTION OPPOSITE TO THAT IN WHICH SAID MOTOR IS ADAPTED TO ROTATE SAID ARM, RESILIENT MEANS CONNECTED TO SAID ARM AND BIASING THE SAME TOWARD ENGAGED WITH SAID STOP MEANS, A LOAD CIRCUIT INCLUDING AN ELECTRICAL SWITCH, SAID MOTOR DEVELOPING A TORQUE GREATER THAN THAT OF SAID RESILIENT MEANS WHEN THE RESISTANCE OF SAID MOTOR CIRCUIT IS REDUCED TO A PREDETERMINED VALUE BY SAID CELL, A LEVER ANGULARLY SPACED ABOUT THE ROTATIONAL AXIS OF SAID ARM FROM SAID STOP MEANS AND ADAPTED TO ENGAGE SAID ARM AND BE ROTATED THEREBY WHEN THE LATTER IS ROTATED AWAY FROM SAID STOP MEANS BY SAID MOTOR, SAID SWITCH HAVING AN ELEMENT OPERATIVELY CONNECTED TO SAID LEVER FOR MOVEMENT FROM ONE POSITION TO ANOTHER WHEN SAID LEVER IS ROTATED.