Plural remote controllers for plural motors using a common power connection

Claim 1

A MOTOR CONTROL SYSTEM FOR USE IN A SYSTEM HAVING ELECTRICAL DISTRIBUTION MEANS FOR APPLYING ALTERNATING CURRENT OF GIVEN FREQUENCY TO AT LEAST ONE ELECTRIC MOTOR OPERABLE ON UNIDIRECTIONAL CURRENT, SAID MOTOR CONTROL SYSTEM COMPRISING TRANSMITTER MEANS ADAPTED TO PRODUCE REPETITIVE CONTROL PULSES OF ALTERNATIVE VOLTAGE AT A SELECTED FREQUENCY GREATER THAN SAID GIVEN FREQUENCY AND OCCURRING DURING AT LEAST A PORTION OF ALTERNATE HALF-CYCLES OF SAID ALTERNATING CURRENT, MEANS TO VARY THE PHASE OF THE OCCURRENCE OF SAID CONTROL PULSES WITHIN SAID ALTERNATE HALF-CYCLES OF ALTERNATING CURRENT TO VARY THE SPEED OF ROTATION OF SAID MOTOR, MEANS FOR SHIFTING THE OCCURRENCE OF THE CONTROL PULSES FROM TIMES DURING ONE SET OF ALTERNATE HALF-CYCLES OF THE POWER CURRENT OF TIMES DURING THE OTHER SET OF ALTERNATE HALF-CYCLES TO CONTROL THE DIRECTION OF ROTATION OF SAID MOTOR, MEANS TO APPLY SAID REPETITIVE CONTROL PULSES TO SAID ELECTRICAL DISTRIBUTION MEANS, AND RECEIVER MEANS COMPRISING A PAIR OF ELECTRICALLY CONTROLLED RECTIFIER DEVICES CONNECTED IN PARALLED WITH UNLIKE CURRENT TERMINALS CONNECTED TOGETHER AND EACH HAVING A CONTROL ELECTRODE, SAID PAIR OF RECTIFIER DEVICES BEING CONNECTED TO SELECTIVELY APPLY SAID ALTERNATING CURRENT TO SAID MOTOR, AND FILTER MEANS RESPONSIVE TO SAID SELECTED FREQUENCY OF THE ALTERNATING VOLTAGE OF THE CONTROL PULSES AND CONNECTED TO EACH OF SAID CONTROL ELECTRODES TO CAUSE