Vibration-resistant probe-like electrical heaters

Details Vibration-resistant probe-like electrical heaters Vibration-resistant probe-like electrical heaters

1979-08-31

1981-08-11

Valentine, Donald R.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

204195S, 219541, 219546, 338268, 338270, 338271, 338302, H01L 700, H05B 308, G01N 2726

Patent

active

042837030

ABSTRACT:
A probe-like, vibration-resistant fast-heating electrical heater assembly for use in a pollution sensor of an exhaust monitoring system for internal combustion engines, which comprises an elongate metal tube having concentrically disposed therein a metal conductor rod which is insulated from the tube. At one pair of corresponding ends, the tube and rod carry a ceramic coil form having an open winding on it comprising a helical resistance coil that is disposed in a helical groove of the coil form. Ceramic cement is utilized to secure the coil form in place, and also to mount the conductor rod in the conductor tube whereby a rigid, vibration-resistant assemblage is had that can also withstand high temperatures. The conductor tube is carried in a terminal post that has an annular flange at one end for the purpose of mounting the heater assembly in the associated equipment.

REFERENCES:
patent: 2484544 (1949-10-01), Bennett et al.
patent: 2485496 (1949-10-01), Korsgren et al.
patent: 3498279 (1970-03-01), Seeley, Jr.
patent: 4155827 (1979-05-01), Maurer et al.
patent: 4169778 (1979-10-01), Mann et al.
patent: 4175019 (1979-11-01), Murphy

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