Contactless two phase motor control with limit switching

Claim 1

IN A MOTOR CONTROL ARRANGEMENT, THE COMBINATION COMPRISING A MOTOR HAVING A MAIN WINDING AND A CONTROL WINDING, MEANS CONNECTING AN A.-C. SUPPLY LINE TO THE MAIN WINDING, A SOURCE OF CONTROL SIGNAL FOR SAID CONTROL WINDING AND HAVING POSITIVE OR NEGATIVE PHASING WITH RESPECT TO THE CURRENT IN THE MAIN WINDING FOR FORWARD AND REVERSE ROTATION OF THE MOTOR, A DRIVEN MEMBER COUPLED TO THE MOTOR FOR MOVEMENT BETWEEN LIMIT POSITIONS, NORMALLY CLOSED LIMIT SWITCHES ARRANGED TO BE OPENED BY THE DRIVEN MEMBER UPON REACHING ITS RESPECTIVE LIMIT POSITIONS AND EACH BEING CONNECTED TO THE CONTROL WINDING FOR FEEDING CONTROL SIGNALS THERETO, AND AMPLIFIER MEANS CONTROLLED BY THE SOURCE OF CONTROL SIGNAL AND SUPPLIED WITH CURRENT FROM THE SUPPLY LINE FOR ENERGIZING THE CONTROL WINDING, SAID AMPLIFIER MEANS INCLUDING MEANS FOR DIRECTING AMPLIFIED CONTROL SIGNAL OF ONE PHASE TO THE CONTROL WINDING SOLELY THROUGH ONE OF SAID LIMIT SWITCHES AND FOR DIRECTING AMPLIFIED CONTROL SIGNAL OF OPPOSITE PHASE TO THE CONTROL WINDING SOLELY THROUGH THE OPPOSITE LIMIT SWITCH.