| 摘要 |
1,080,389. Thermocouples. GENERAL ELECTRIC CO. Dec. 9, 1965 [Dec. 24, 1964]], No. 52321/65. Heading H1K. A thermocouple designed for measuring the temperature of molten metal by the technique of lowering the weighted couple into the melt, consists of the couple 4 sealed into the end of a tube 3 carrying the weight 2. The couple closes, and projects beyond the tube end and the weight has three prongs 30 (only two shown) which surround and project beyond the couple. The prongs serve to break the crusty slag on molten steel as the couple is lowered into it, but do not conduct heat away from the couple as a weight connected in front of the couple would. The couple consists of a junction 13 between platinum and platinum-rhodium wires 11, 12 connected respectively to coppernickel and copper leads 14, 15. These are sealed into the tube end with a cementitious filler 8 and the couple itself is enclosed by a fusible cap 9. Lead-out cable wires 18, 19 are maintained slack within the tube 3 by the engagement of members 24 and 27 carried by the tube and the cable respectively. Outside the tube the cable 20 is spirally wrapped around a conical pulley 20 (Fig. 3, not shown) from which the couple is lowered, e.g. down a shoot, into the molten metal. |
