Cartridge heater with improved thermocouple

Details Cartridge heater with improved thermocouple Cartridge heater with improved thermocouple

1977-02-18

1978-09-19

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219510, 219544, 219552, 338241, 425144, H05B 380

Patent

active

041156862

ABSTRACT:
A cartridge heater with improved thermocouple comprising a tubular metal sheath with a front end having a central opening therein, a metal plug engaged in and closing said opening, a filler of dielectric material in the sheath rearward of the plug, a resistance wire within and extending longitudinally of the sheath and supported by said filler, said plug having a pair of circumferentially spaced axially extending and radially outwardly opening grooves, a pair of elongate thermocouple wires supported by the filler within the sheath and having front end portions tightly engaged in and between in said opening and grooves, and an annular weld about the foremost line of contact between said sheath and plug and across the forward ends of said grooves.

REFERENCES:
patent: 3754118 (1973-08-01), Booker
patent: 3890485 (1975-06-01), Kozbelt
patent: 3911251 (1975-10-01), Day
patent: 3920963 (1975-11-01), Beasley
patent: 3970821 (1976-07-01), Crandell
patent: 4010351 (1977-03-01), Williams et al.

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