Reversible motor speed control

Claim 1

A SPEED GOVERNOR SYSTEM FOR A REVERSIBLE ELECTRIC MOTOR HAVING ENERGIZING WINDINGS AND A MOTOR SHAFT, A PAIR OF GOVERNOR CONTACTS MOUNTED ON SAID MOTOR SHAFT AND BEING CAUSED TO BE OPENED IN ACCORDANCE WITH A PREDETERMINED SPEED OF SAID SHAFT; A FIRST AND A SECOND TRANSISTOR EACH HAVING BASE, EMITTER AND COLLECTOR ELEMENTS; A FIRST CONTROL CIRCUIT INCLUDING SAID CONTACTS AND TWO ELEMENTS OF SAID FIRST TRANSISTOR; A SECOND CONTROL CIRCUIT INCLUDING SAID CONTACTS AND TWO ELEMENTS OF SAID SECOND TRANSISTOR; AN OUTPUT CIRCUIT INCLUDING SAID WINDINGS AND ANOTHER TWO OF SAID ELEMENTS OF EACH OF SAID TRANSISTORS, ONE OF THE ELEMENTS OF EACH TRANSISTOR BEING COMMON TO ITS CONTROL CIRCUIT AND TO SAID OUTPUT CIRCUIT; SAID CIRCUITS BEING ADAPTED TO BE CONNECTED TO A SOURCE OF POWER OF REVERSIBLE POLARITY; CURRENT DIRECTION LIMITING MEANS IN SAID CIRCUITS SO ARRANGED THAT FOR A GIVEN APPLIED INPUT POLARITY TO SAID CIRCUITS CURRENT WILL FLOW THROUGH SAID OUTPUT CIRCUIT AND ONLY ONE OF SAID CONTROL CIRCUITS, WHEREBY WHEN SAID MOTOR SHAFT ROTATES, SAID CONTACTS WILL BE CAUSED TO INTERMITTENTLY SEPARATE AND ENGAGE AS THE SHAFT SPEED FLUCTUATES ABOUT SAID PREDETERMINED SPEED, THEREBY TURNING ONE OF SAID TRANSISTORS ON AND OFF TO CONTROL THE POWER INPUT TO SAID WINDINGS AND CONSEQUENTLY THE SPEED OF THE MOTOR, REGARDLESS OF THE DIRECTION OF CURRENT FLOW THROUGH SAID MOTOR.