Waterproof terminal constructions and electrical heating elements including same

Claim 1

IN A COOKING VESSEL A WATERPROOF TERMINAL CONSTRUCTION FOR A HEATING ELEMENT COMPRISING A CAST METAL COOKING VESEEL, A SHEATHED TYPE HEATING ELEMENT CAST IN THE COOKING VESSEL, SAID ELEMENT INCLUDING A TUBULAR SHEATH, MEANS ON SAID VESSEL DEFINING A WELL AT ONE END OF SAID SHEATH, A CENTRAL TERMINAL LEAD FOR THE HEATING ELEMENT, A SEALING ELEMENT OF A HEAT-RESISTANT FLEXIBLE MATERIAL WHICH ELEMENT IS CYLINDRICAL IN ITS UNSTRAINED STATE, AND AXIAL BORE THROUGH THE SEALING ELEMENT, THE TERMINAL LEAD EXTENDING THROUGH THE AXIAL BORE, AN ELONGATED HOLLOW TERMINAL ENCLOSING THE SAID CENTRAL TERMINAL LEAD, AN ENLARGED END TO THE HOLLOW TERMINAL, AN INSULATOR SURROUNDING THE INNER END OF THE TERMINAL, A WELL IN THE BASE OF THE INSULATOR ENCLOSING THE ENLARGED END OF THE TERMINAL, A CIRCUMFERENTIALLY EXTENDING STEP ON THE OUTER SURFACE OF THE INSULATOR, A RETAINING WASHER SEATED ON THE STEP OF THE INSULATOR AND MEANS FOR SECURING THE RETAINING WASHER WITHIN THE WELL IN THE CASTING TO COMPRESS THE SEALING ELEMENT AXIALLY BETWEEN THE BASE OF THE WELL IN THE CASTING AND THE ENLARGED END OF THE TERMINAL, THE SEALING ELEMENT EXPANDING RADIALLY TO FILL THE GREATER PART OF THE BASE OF THE WELL IN THE CASTING.