| 摘要 |
720,992. Measuring temperature electrically. MULLARD RADIO VALVE CO., Ltd. June 11, 1953, No: 16115/53. Class 40 (1) A temperature-sensitive resistor consists of a coiled fine wire resistance such as filament wire used in electric lamps, which is supported by insulating rods 2 in a frame. The closely-coiled resistance wire 4, initially wound on a mandrel'in known manner, is then wound in a helical groove la, Fig. 1, in a cylindrical jig 1 over four insulating rods 3 disposed in longitudinal slots 2 in the jig, the wire ends being secured to terminal leads 4a, 4b. The whole is now immersed in acid to dissolve the mandrel and after neutralising, washing and drying the jig is inserted in a frame Fig. 2, consisting of end plates 6 and rods 7. The rods 2 are now moved away from the surface of the jig along radial slots 8 in the end plates 6 and secured in the outer bayonet ends 8a of those slots and preferably cemented. The jig is then removed leaving the stretched coiled resistance wire as in Fig. 3 (not shown). The lead wires 4a, 4b are soldered to plug pin terminals 9. |
