Follow up motor control system including provision for braking

Claim 1

A MOTOR SYSTEM INCLUDING AN ELECTRIC MOTOR HAVING AN OUTPUT SHAFT ADAPTED TO BE CONNECTED TO AN DRIVEN MEMBER AND PRECISELY AND SMOOTHLY STOP A DRIVEN MEMBER IN A SELECTED POSITION, SAID SYSTEM INCLUDING A MOTOR CONTROL CIRCUIT CONNECTED WITH SAID MOTOR, SAID CONTROL CIRCUIT INCLUDING INPUT TERMINALS ADAPTED TO BE CONNECTED WITH A SOURCE OF ELECTRICAL ENERGY, A MOTOR SHORTING BRAKING CIRCUIT CONNECTED WITH THE MOTOR FOR DYMANICALLY STOPPING THE MOTOR WHEN THE BRAKING CIRCUIT IS CLOSED, SAID MOTOR CONTROL CIRCUIT INCLUDING FIRST MEANS FOR CONNECTING SAID MOTOR TO SAID TERMINALS AND DRIVING THE MOTOR IN A FORWARD OR REVERSE DIRECTION, MEANS OPERATED BY SAID FIRST MEANS FOR OPENING AND CLOSING SAID BRAKING CIRCUIT, SAID MOTOR CONTROL CIRCUIT INCLUDING CONTROL MEANS FOR CONTROLLING THE OPERATION OF SAID FIRST MEANS FOR DRIVING THE MOTOR IN EITHER DIRECTION AS DESIRED, SAID CONTROL MEANS INCLUDING A BALANCED RELAY SWITCH MEANS OPERATIVELY CONNECTED WITH SAID FIRST MEANS, SAID CONTROL MEANS INCLUDING A SELECTIVELY OPERABLE VARIABLE IMPEDANCE MEANS, A SECOND VARIABLE IMPEDANCE MEANS, SAID SECOND VARIABLE IMPEDANCE MEANS INCLUDING A MOVABLE MEANS DRIVINGLY CONNECTED WITH SAID OUTPUT SHAFT, SAID BALANCED RELAY SWITCH