Automatic heating control system adjusted by outside temperature

Claim 1

AN AUTOMATIC HEAT CONTROL SYSTEM FOR BUILDING INTERIORS COMPRISING TWO THERMOMETERS EACH HAVING ELECTRICALLY CONDUCTING THERMOMETRIC MATERIALS AND A PLURALITY OF ELECTRIC TAPS ALONG THE EXPANSION PATH OF SAID MATERIAL SO THAT THE RESPECTIVE TAPS CORRESPOND TO PARTICULAR TEMPERATURES, ONE OF SAID THERMOMETERS BEING RESPONSIVE TO A HEATING MEDIUM AND ONE TO THE AMBIENT TEMPERATURE OUTSIDE THE BUILDING, CIRCUIT MEANS CONNECTING THE TAPS OF ONE THERMOMETER IN DESCENDING TEMPERATURE ORDER TO TAPS OF THE OTHER THERMOMETER IN ASCENDING TEMPERATURE ORDER, RELAY MEANS HAVING A COIL CONNECTED TO ONE OF SAID THERMOMETRIC MATERIALS, SAID RELAY MEANS BEING CONNECTABLE TO A BURNER FOR CHANGING THE TEMPERATURE OF THE HEATING MEDIUM, SAID CIRCUIT MEANS INCLUDING ELECTRICALLY ACTUABLE SWITCH MEANS INTERPOSED IN THE CONNECTIONS BETWEEN THE TAPS OF ONE OF SAID THERMOMETERS AND THE CORRESPONDINGLY CONNECTED TAPS OF THE OTHER OF SAID THERMOMETERS FOR VARYING THE CONNECTION OF SAID TAPS ON SAID THERMOMETERS SO THAT THE CONDITION FOR RELAY OPERATION VARIES, A THIRD THERMOMETER HAVING A THERMOMETRIC LIQUID AND ELECTRIC TAPS FOR RESPONDING TO THE BUILDING-INTERIOR TEMPERATURE, AND NETWORK MEANS FOR CONNECTING THE THERMOMETRIC LIQUID OF SAID THIRD THERMOMETER TO THE THERMOMETRIC LIQUID OF ONE OF SAID FIRST-MENTIONED TWO THERMOMETERS, FOR CONNECTING SAID THIRD THERMOMETER TO A SOURCE OF CURRENT AND FOR CONNECTING THE TAPS OF SAID THIRD THERMOMETER TO SAID SWITCH MEANS FOR VARYING SAID SWITCH MEANS IN DEPENDENCE UPON THE BUILDING-INTERIOR TEMPERATURE.