Immersible thermocouple assembly

Claim 1

IN AN EXPENDABLE IMMERSION THERMOCOUPLE UNIT, A THERMOCOUPLE ASSEMBLY COMPRISING A MOLDED ORGANIC PLASTIC TUBULAR BODY MEMBER HAVING LONGITUDINALLY ALIGNED BORES, THE FOREMOST OF SAID BORES TAPERING IN AN OUTWARD DIRECTION AND BEING OF LARGER DIAMETER THAN THE REARMOST OF SAID BORES AND AN ANNULAR TRANSVERSE SHOULDER AT THE JUNCTION OF SAID BORES, THE INNER EDGE OF SAID ANNULAR SHOULDER BEING BEVELED AND A PLURALITY OF RADIAL LUGS ON THE SAID BEVELED EDGE FORMING A SPLINE STRUCTURE PROVIDING COMMUNICATING CHANNELS BETWEEN SAID BORES, THE INNER EDGES OF SAID LUGS BEING NOTCHED, A PROTECTUVE FUSIBLE METAL CAP PROJECTING FORWARDLY OF SAID BODY MEMBER AND HAVING A FLARED RIM SEATED ON THE NOTCHES EDGES OF SAID LUGS, A U-SHAPED HEAT-TRANSMITTING TUBE MOUNTED IN SAID CAP WITH ITS CURVED PORTION FOREMOST FOR EXPOSURE ON MELTING OF SAID CAP, THERMOCOUPLE WIRES JOINED TOGETHER AND FORMING A HEAT-SENSING JUNCTION WITHIN THE PORTION OF SAID TUBE EXPOSED ON MELTING OF SAID CAP, ONE END OF EACH OF SAID THERMOCOUPLE WIRES BEING CONNECTED WITHIN SAID BODY MEMBER TO A SEPARATE ONE OF A PAIR OF SPACED APART CURRENT LEAD WIRES, SAID LEAD WIRES HAVING PORTIONS THEREOF EXPOSED AT THE REAR OF SAID BODY MEMBER FOR CONNECTION WITH CONTACTS OF AN ELECTRICAL MEASURING APPARATUS, AND A SOLID, UNITARY BODY OF ELECTRICALLY AND HEAT-INSULATING REFRACTORY ELEMENT FILLING THE CHANNELS BETWEEN THE SAID LUGS AND MECHANICALLY SEALING SAID BODY MEMBER, THE FLARED RIM OF SAID CAP, THE ENDS OF SAID U-SHAPED TUBE AND THE JUNCTIONS BETWEEN SAID LEAD WIRES AND SAID THERMOCOUPLE WIRES BEING EMBEDDED IN SAID CEMENT BODY.