Glow plug having self-temperature control function

Details Glow plug having self-temperature control function Glow plug having self-temperature control function

1990-09-10

1992-07-21

Bartis, Anthony

Electric heating

Heating devices

Resistive element: igniter type

123145A, 219541, 219544, 219553, 338 22R, H05B 102, H05B 318, F23Q 722, H01C 306

Patent

active

051325160

ABSTRACT:
A self temperature control type glow plug includes first and second resistor elements and a sheath. The sheath diameter of a first portion of the sheath in which the first resistor element is embedded is set to be smaller than the sheath diameter of a second portion of the sheath in which the second resistor element is embedded, wherein the ratio of the latter diameter of the former diameter ranges from 1.3:1 to 2:1. A tapered portion of the sheath joining the first and second sheath portions encloses a gap larger than at least the sheath diameter of the portion in which the first resistor element is embedded between the first and second resistor elements. The first and second resistor elements are connected to each other within the gap through a connecting means having a substantially zero resistance.

REFERENCES:
patent: 4211204 (1980-07-01), Glaumer et al.
patent: 4423309 (1983-12-01), Murphy et al.
patent: 4549071 (1985-10-01), Hatamaka et al.
patent: 4636614 (1987-01-01), Itoh et al.
patent: 4733053 (1988-03-01), Mueller

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