Heating unit for melting soft or white metal

Claim 1

A HEATING UNIT FOR MELTING SOFT METAL COMPRISING A PAIR OF RESISTANCE HEATING ELEMENTS ENCLOSED IN TUBULAR METAL SHEATHS WITH THE ENDS OF THE SHEATHS CONNECTED IN ADJACENT RELATION TO A MOUNTING PLATE, SAID SHEATHS BEING ARRANGED IN GENERALLY PARALLEL SPACED RELATION LATERALLY FROM SAID MOUNTING PLATE WITH DOWNWARDLY EXTENDING PORTIONS CONNECTING TO FURTHER LATERALLY OFF-SET SINUOUS MAIN HEATING PORTIONS, METALLIC HEAT RADIATING PLATE MEANS CONTACTING SAID SHEATHS ALONG SAID MAIN HEATING PORTIONS AND THE DOWNWARDLY EXTENDING PORTIONS OF THE SHEATHS, SAID PLATE MEANS PROJECTING BEYOND THE OUTLINE OF SAID SHEATHS TO PROTECT THE SHEATHS AND SUPPORT THE UNIT FROM THE WALLS OF A MELTING TANK, AND RELEASABLE CLAMP PLATES ENGAGED WITH SAID SHEATHS AND REMOVABLY BOLTED TO SAID PLATE MEANS AT SPACED POINTS TO HOLD SAID SHEATHS IN HEAT TRANSMITTING CONTACT WITH SAID PLATE MEANS.