Temperature control chamber utilizing operational power supplies

Claim 1

IN A TEMPERATURE CONTROL SYSTEM, THE COMBINATION OF, A CHAMBER THE TEMPERATURE OF WHICH IS TO BE CONTROLLED, TEMPERATURE SENSING MEANS WITHIN SAID CHAMBER, AN ELECTRICAL CURRENT OPERATED HEATING DEVICE WITHIN SAID CHAMBER, FEEDBACK CONTROLLED ELECTRICAL POWER MEANS FOR PASSING ELECTRICAL CURRENT THROUGH SAID HEATING DEVICE IN ACCORDANCE WITH THE RESPONSE OF SAID TEMPERATURE SENSING MEANS, A COLD AIR STORAGE CHAMBER, AN ELECTRICAL MOTOR OPERATED FAN FOR MOVING COOL AIR FROM SAID COLD AIR STORAGE CHAMBER TO SAID CHAMBR THE TEMPERATURE OF WHICH IS TO BE CONTROLLED, FEEDBACK CONTROL MEANS COUPLED TO SAID MOTOR FOR DRIVING SAID MOTOR IN RESPONSE TO PREDETERMINED TEMPERATURE CONDITIONS WITHIN THE FIRST SAID CHAMBER, A SOURCE OF VOLTAGE CONNECTED IN SERIES WITH SAID MOTOR OUTSIDE SAID FEEDBACK CONTROL MEANS FOR AT LEAST PARTIALLY OVERCOMING THE INERTIA OF SAID MOTOR, AND A LOADED FLOAT VALVE MEANS POSITIONED TO CONDUCT THE AIR FROM SAID COLD AIR STORAGE CHAMBER TO SAID TEMPERATURE CONTROLLED CHAMBER FOR LINEARIZING THE AIR FLOW VS. MOTOR DRIVE VOLTAGE TRANSFER FUNCTION AND FOR SEALING SAID TRANSFER OF AIR AGAINST REVERSE LEAKAGE.