Thermostatically controlled electric immersion heater unit

Claim 1

IN COMBINATION, A LIQUID CONTAINER AND A COMBINED ELECTRICAL HEATER AND THERMOSTAT UNIT ATTACHED TO A BOTTOM OF THE LIQUID CONTAINER TO EXTEND UPWARDLY AND DOWNWARDLY THEREFROM, SAID UNIT COMPRISING A METAL CASE HAVING A CLOSED END AND AN OPEN END, A WIRE HEATER MEANS POSITIONED IN SAID CASE ADJACENT SAID CLOSED END AND HAVING A PAIR OF LEADS EXTENDING THEREFROM, AND END PLATE HAVING A TUBULAR CLOSED END PROJECTION THEREON SECURED TO THE OPEN END OF SAID METAL CASE AND BEING IN CONTACT THEREWITH, SAID PROJECTING HAVING A THREADED PERIPHERY AND BEING ADAPTED TO BE POSITIONED BELOW THE BOTTOM OF SAID LIQUID CONTAINER TO AID IN SECURING A SUPPORT BASE THERETO, A THERMOSTAT AT LEAST SUBSTANTIALLY COMPLETELY RECEIVED IN AND CARRIED BY SAID PROJECTION TO SENSE THE TEMPERATURE OF THE AIR SURROUNDING THE PROJECTION, SAID WIRE HEATER MEANS BEING OPERATIVELY CONNECTED TO SAID THERMOSTAT WITH ONLY TWO LEADS EXTENDING FROM SAID UNIT FOR POWER SUPPLY THERETO, AND A BASE FOR SAID CONTAINER ATTACHED TO SAID PROJECTION AND FORMING AN ENCLOSURE THEREAROUND.