Temperature controlled glow plug having controlled saturation an

Details Temperature controlled glow plug having controlled saturation an Temperature controlled glow plug having controlled saturation an

1992-05-04

1993-04-27

Bartis, Anthony

Electric heating

Heating devices

Resistive element: igniter type

123145A, 219539, 219544, F23Q 722, H05B 300, F02P 1902, H01C 302

Patent

active

052064832

ABSTRACT:
A sheath heater is formed by connecting first and second helical resistive elements having different positive resistance temperature coefficients in series, and incorporating the first and second resistive elements in a sheath such that the two resistive elements are embedded in a heat resistance electric insulating powder. The sheath diameter of a sheath portion in which the first resistive element is embedded is set to be smaller than that of a sheath portion in which the second resistive element is embedded. In addition, the first and second resistive elements are connected to each other, through connecting ends extending to be located within the outer diameter of the first resistive element, within a gap larger than the sheath diameter of the sheath portion in which the first resistive element is embedded.

REFERENCES:
patent: 4549071 (1985-10-01), Hatanaka et al.
patent: 4636614 (1987-01-01), Itoh et al.
patent: 5039839 (1991-08-01), Masaka et al.
patent: 5118921 (1992-06-01), Aota

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