Motor current limiting apparatus

Claim 1

IN COMBINATION, AN ENCLOSURE HOUSING A MEDIUM, A TUBE WITHIN THE ENCLOSURE CONTAINING A COOLING FLUID, AN ELECTRIC MOTOR, MEANS ASSOCIATED WITH THE MOTOR ON WHICH THE MEDIUM IN THE ENCLOSURE IMPOSES A WORK LOAD, A MOVABLE MEMBER WITHIN THE ENCLOSURE FOR REGULATING THE LOAD WHICH THE HOUSED MEDIUM IMPOSES ON THE ELECTRIC MOTOR ASSOCIATED MEANS, A PNEUMATIC MOTOR FOR OPERATING SAID MOVABLE MEMBER, A FLUID THERMOSTAT RESPONSIVE TO THE TEMPERATURE OF THE COOLING FLUID WITHIN SAID TUBE, CONTROL FLUID PIPING FORMING UNDER ALL MAGNITUDES OF ELECTRIC MOTOR CURRENT DIRECT AND CONTINUOUS FLUID COMMUNICATION BETWEEN THE FLUID THERMOSTAT AND SAID PNEUMATIC MOTOR TO TRANSMIT FLUID UNDER PRESSURE CONTINUOUSLY TO THE LATTER, SAID CONTROL FLUID PIPING INCLUDING FLUID RESTRICTING MEANS, SOLENOID VALVE MEANS SHUNTED OFF OF SAID PIPING AND HAVING A FLUID DISCHARGE ORIFICE AND AN ELECTRICALLY OPERATED VALVE PLUNGER CONTROLLING THE ORIFICE, AND MEANS RESPONSIVE TO THE MAGNITUDE OF THE ELECTRICAL CURRENT DRAWN BY SAID ELECTRIC MOTOR FOR POSITIONING THE SOLENOID VALVE PLUNGER BETWEEN OPEN AND CLOSED POSITIONS RELATIVE TO THE FLUID DISCHARGE ORIFICE TO VARY THE PRESSURE OF THE FLUID TRANSMITTED TO THE PNEUMATIC MOTOR THROUGH THE PIPING BETWEEN THE THERMOSTAT AND PNEUMATIC MOTOR WHEN THE ELECTRICAL CURRENT DRAWN BY THE ELECTRIC MOTOR EXCEEDS A PREDETERMINED VALUE.