Control circuit employing thermally responsive switch means

Claim 1

IN A SYSTEM FOR ASSOCIATION WITH A SOURCE OF ELECTRIC ENERGY HAVING A VARIABLE VOLTAGE, THE COMBINATION OF REGULATING MEANS FOR SUPPLYING ENERGY FROM THE SOURCE AS A SERIES OF VARYING AMPLITUDE PULSATIONS OVER A RANGE OF VARIATION OF THE VOLTAGE OF THE SOURCE AT A PRESELECTED RATE AND HAVING A SUBSTANTIALLY CONSTANT EFFECTIVE VOLTAGE OVER A RANGE OF VARIATION OF THE VOLTAGE OF THE SOURCE COMPRISING A PAIR OF NORMALLY CLOSED ELECTRICAL CONTACTS, A POLYMETALLIC ELEMENT SUPPORTED AT ONE END AND CONTROLLING THE POSITION OF ONE OF SAID ELECTRICAL CONTACTS RELATIVE TO THE OTHER AND EFFECTIVE UPON HEATING TO MOVE SAID ONE OF SAID ELECTRICAL CONTACTS AWAY FROM THE OTHER TO OPEN SAID CONTACTS, ELECTRICALLY ENERGIZABLE HEATING MEANS FOR SAID OLYMETALLIC ELEMENT, ELECTRICALLY ENERGIZABLE LOAD, MEANS ENERGIZABLE FROM SAID REGULATING MEANS BY SAID SERIES OF PULSATIONS AND HAVING INHERENT HEAT CAACITY AND INTEGRATING SAID PULSATIONS AND RESPONDING TO THE EFFECTIVE VALUE OF THE VOLTAGE FROM SAID REGULATING MEANS, MEANS FOR CONNECTING THE LOAD MEANS IN SERIES WITH SAID ELECTRICAL CONTACTS ACROSS THE SOURCE AND FOR CONNECTING SAID HEATING MEANS IN SERIES WITH SAID ELECTRICAL CONTACTS ACROSS THE SOURCE FOR CAUSING SAID ELECTRICAL CONTACTS TO CONTROL THE FLOW OF CURRENT FROM THE SOURCE THROUGH BOTH SAID HEATING MEANS AND THE LOAD MEANS FOR ENERGIZING THE LOAD MEANS AND SAID HEATING MEANS WHEN SAID ELECTRICAL CONTACTS ARE CLOSED, A RESISTOR, AND MEANS CONNECTING SAID RESISTOR IN SERIES WITH THE LOAD MEANS ACROSS THE SOURCE FOR ESTABLISHING AN ENERGIZING CIRCUIT FOR THE LOAD MEANS WHICH EXCLUDES SAID ELECTRICAL CONTACTS FOR MAINTAINING THE LOAD MEANS CONTINUOUSLY ENERGIZED DURING THE USE OF THE SYSTEM INDEPENDENTLY OF WHETHER SAID ELECTRICAL CONTACTS ARE OPENED OR CLOSED.