Reset mechanism for power operated loads

Claim 1

IN A POWER DRIVE FOR A REVERSIBLE LOAD: ELECTRIC MOTOR MEANS FOR MOVING A LOAD IN A FORWARD AND REVERSE DIRECTION; A MEMBER GUIDED FOR MOVEMENT IN A PATH; MEANS DETERMINING A CENTRAL NEUTRAL POSITION OF THE MEMBER IN WHICH SAID MEMBER HAS A LIMITED RANGE OF MOVEMENT; MEANS SENSING THE TORQUE LOAD OF SAID MOTOR FOR EXERTING A FORCE UPON SAID MEMBER CORRESPONDING IN MAGNITUDE AND DIRECTION TO THE MAGNITUDE AND DIRECTION OF SAID TORQUE LOAD; FIRST SPRING MEANS OPERABLE AFTER MOVEMENT OF THE MEMBER IN ONE DIRECTION FROM BEYOND SAID NEUTRAL STABLE POSITION FOR INCREASINGLY OPPOSING MOVEMENT OF SAID MEMBER IN SAID ONE DIRECTION; SECOND SPRING MEANS OPERABLE AFTER MOVEMENT OF THE MEMBER IN THE OTHER DIRECTION BEYOND SAID CENTRAL NEUTRAL POSITION FOR INCREASINGLY OPPOSING MOVEMENT OF SAID MEMBER IN SAID OTHER DIRECTION; A FIRST SWITCHING MEANS HAVING ALTERNATE STABLE STATES; MEANS FORMING A FORWARD ENERGIZATION CIRCUIT FOR SAID MOTOR MEANS AND DEPENDENT UPON THE FIRST SWITCHING MEANS BEING IN ONE OF ITS STATES; MOVEMENT OF SAID MOTOR MEANS IN THE FORWARD DIRECTION EXERTING A TORQUE TENDING TO MOVE SAID MEMBER IN SAID ONE DIRECTION; A SECOND SWITCHING MEANS HAVING ALTERNATE STABLE STATES; MEANS FORMING A REVERSE ENERGIZATION CIRCUIT FOR SAID MOTOR MEANS AND DEPENDENT UPON THE SECOND SWITCHING MEANS BEING IN ONE OF ITS STATES; MOVEMENT OF SAID MOTOR MEANS IN THE REVERSE DIRECTION EXERTING A TORQUE TENDING TO MOVE SAID MEMBER IN SAID OTHER DIRECTION; LINKAGE MEANS RESPONSIVE TO INITIAL MOVEMENT OF SAID MEMBER IN SAID ONE DIRECTION AND IN SAID LIMITED RANGE FOR MOVING SAID SECOND SWITCHING MEANS TO ITS SAID ONE STATE, AND RESPONSIVE TO INITIAL MOVEMENT OF SAID MEMBER IN SAID OTHER DIRECTION IN SAID LIMITED RANGE FOR MOVING SAID FIRST SWITCHING MEANS TO ITS SAID ONE STATE; SWITCH ENGAGING MEANS OPERATIVE UPON PREDETERMINED MOVEMENT OF SAID MEMBER IN ONE DIRECTION BEYOND SAID NEUTRAL RANGE FOR MOVING SAID FIRST SWITCHING MEANS TO ITS OTHER STATE, AND UPON PREDETERMINED MOVEMENT OF SAID MEMBER IN THE OTHER DIRECTION BEYOND SAID NEUTRAL RANGE FOR MOVING SAID SECOND SWITCHING MEANS TO ITS OTHER STATE.