Spark plug and manufacturing process thereof

Details Spark plug and manufacturing process thereof Spark plug and manufacturing process thereof

1980-09-10

1983-11-08

Demeo, Palmer C.

Electric lamp and discharge devices

Spark plugs

Plural part center electrode lead-in

313141, 445 7, H01T 1320, F23Q 370

Patent

active

044144830

ABSTRACT:
A spark plug with a rivet-like tip center discharge electrode is obtained by melting powdery metal essentially consisting of noble metal Au, Ag and/or alloys thereof with Pd or the like charged in a small end bore formed at a discharge end bottom of a ceramic insulator then allowing to cool. Sealing and/or resistor incorporation together with setting (sealing) of a terminal rod may be done one-stepwise with the center electrode formation or two-stepwise after the center electrode formation. A resultant space in the center bore may be utilized for various purposes.

REFERENCES:
patent: 2265352 (1941-12-01), Corbin et al.
patent: 2296045 (1942-09-01), McDougal et al.
patent: 2505150 (1950-04-01), Schwartzwalder et al.
patent: 3349275 (1967-10-01), Blum et al.
patent: 3567658 (1971-03-01), Webb et al.
patent: 4001145 (1977-01-01), Sakai et al.
patent: 4006106 (1977-02-01), Yoshida et al.

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