Electric heating – Heating devices – Resistive element: igniter type
Patent
1997-11-18
1999-12-07
Leung, Philip H.
Electric heating
Heating devices
Resistive element: igniter type
219541, 219544, 219553, 123145A, F23Q 722
Patent
active
059987650
ABSTRACT:
A ceramic glow plug (A) is constituted by a metallic sheath (1); a cylindrical main metallic shell (2) having a holding part (21) which holds a rear part (11); an ceramic heating element (3) fitted into the metallic sheath (1) and obtained by connecting one-side ends (331, 341) of lead-out wires (33, 34) respectively to the ends (321, 322) of a heating resistor (32) to obtain a heater main body, embedding the heater main body in a ceramic powder, and hot-pressing and sintering the powder; a terminal electrode (4) inserted into the cylindrical main metallic shell (2) on its rear end side and insulated therefrom; and lead coils (51, 52) connected to the lead-out wires (33, 34) in such a manner that one-side ends of the coils (51, 52) are brazed respectively to those areas of the lead-out wires (33, 34) which are exposed on the bake surface with a high-purity silver-based brazing material and the other ends thereof are electrically connected respectively to the cylindrical main metallic shell (2) and the terminal electrode (4).
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Mizuno Takanori
Tanaka Katsuhiko
Leung Philip H.
NGK Spark Plug Co. Ltd.
Patel Vinod D.
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