Humidifiers

Claim 2

IN COMBINATION, A HEAT SENSITIVE DEVICE ADAPTED TO BE IN A HEATED ZONE, AN ELECTRICAL CIRCUIT CONTROL SWITCH LOCATED DISTANTLY FROM SAID DEVICE AND HAVING AN ACTUATOR, A TORSION SPRING INTERPOSED BETWEEN SAID DEVICE AND ACTUATOR, SAID SPRING CONSISTING ESSENTIALLY OF A LENGTH OF WIRE FIXED AT OPPOSITE ENDS TO SAID DEVICE AND ACTUATOR, SAID WIRE BEING FIXED TO SAID DEVICE BY BEING IMBEDDED IN A BODY OF FUSIBLE METAL THAT MELTS ONLY AT A PREDETERMINED HIGH TEMPERATURE, MEANS FOR PLACING SAID WIRE UNDER TORSIONAL STRESS BETWEEN SAID ACTUATOR AND SAID END ANCHORED IN SAID DEVICE TO HOLD SAID SWITCH IN CIRCUIT CLOSED CONDITION WHILE SAID END IS ANCHORED IN SAID DEVICE, AND A STATIONARY TUBULAR SHIELD FOR SAID WIRE BETWEEN SAID DEVICE AND SAID ACTUATOR.

Claim 3

IN COMBINATION IN A HUMIDIFIER, A BIASED-OPEN ELECTRIC CIRCUIT CONTROL SWITCH HAVING AN ACTUATOR, A RECEPTACLE FOR CONTAINING LIQUID TO BE EVAPORATED, AND ELECTRICAL HEATER UNIT EXTENDING INTO SAID RECEPTACLE AND ADAPTED TO BE AT LEAST PARTIALLY SUBMERGED IN SAID LIQUID, A HEAT SENSITIVE DEVICE MOUNTED ON SAID UNIT REMOTE FROM SAID SWITCH, A LENGTH OF TORSION SPRING WIRE CONNECTED AT OPPOSITE ENDS TO SAID DEVICE AND SAID ACTUATOR, MANUALLY OPERATED MEANS CONNECTED TO SAID ACTUATOR FOR STRESSING SAID SPRING, MEANS PROVIDING AN OPERATIVE CONNECTION BETWEEN SAID ACTUATOR AND SAID SWITCH ADAPTED TO EXERT A CIRCUIT CLOSING FORCE ON SAID SWITCH WHEN THE SPRING HAS BEEN STRESSED, AND MEANS IN SAID DEVICE FOR AUTOMATICALLY RELEASING THE TORSION SPRING WHEN THE TEMPERATURE AT SAID DEVICE EXCEEDS A PREDETERMINED AMOUNT.

Claim 4

IN COMBINATION IN A HUMIDIFIER, A BIASED-OPEN ELECTRIC CIRCUIT CONTROL SWITCH HAVING AN ACTUATOR, A RECEPTACLE FOR CONTAINING LIQUID TO BE EVAPORATED, AND ELECTRICAL HEATER UNIT EXTENDING INTO SAID RECEPTACLE AND ADAPTED TO BE AT LEAST PARTIALLY SUBMERGED IN SAID LIQUID, A HEAT SENSITIVE DEVICE MOUNTED ON SAID UNIT REMOTE FROM SAID SWITCH, A LENGTH OF TORSION SPRING WIRE CONNECTED AT OPPOSITE ENDS TO SAID DEVICE AND SAID ACTUATOR, MANUALLY OPERATED MEANS CONNECTED TO SAID ACTUATOR FOR STRESSING SAID SPRING, MEANS PROVIDING AN OPERATIVE CONNECTION BETWEEN SAID ACTUATOR AND SAID SWITCH ADAPTED TO EXERT A CIRCUIT CLOSING FORCE ON SAID SWITCH WHEN THE SPRING HAS BEEN STRESSED, AND MEANS IN SAID DEVICE FOR AUTOMATICALLY RELEASING THE TORSION SPRING WHEN THE TEMPERATURE AT SAID DEVICE EXCEEDS A PREDETERMINED AMOUNT.