Electric lamp or space discharge component or device manufacturi – Process – Spark plug or spark gap making
Patent
1988-09-06
1989-10-03
Rowan, Kurt
Electric lamp or space discharge component or device manufacturi
Process
Spark plug or spark gap making
72352, 72367, H01T 2102
Patent
active
048713392
ABSTRACT:
A spark plug is manufactured by assembling an insulator body and an outer metal shell using an improved crimping die having a specially configured annular working face. The working face includes a flat, annular leading working surface configured to exert a substantial portion of the die force initially on an annular lip of the metal shell to plastically deform the lip inwardly onto an adjacent annular shoulder of the insulator body and a flat, annular trailing working surface configured to subsequently engage the lip and exert a substantial portion of the die force on the shoulder of the insulator body generally perpendicular to the shoulder to internally seal the insulator body and the metal shell by plastically compressing an annular gasket therebetween. The crimping die improves the distribution of the die force on the metal shell and the insulator body to reducew excessive deformation of the metal shell and to enhance compression of the sealing gasket for improved internal sealing purposes.
REFERENCES:
patent: 808177 (1905-12-01), Thiem
patent: 1135727 (1915-04-01), Schmidt
patent: 1193075 (1916-08-01), Schmidt
patent: 1521732 (1925-01-01), Thomas
patent: 1609735 (1926-12-01), Rabezzana
patent: 1862981 (1932-06-01), Rabezzana
patent: 2174362 (1939-09-01), Doran
patent: 2308968 (1943-01-01), Gregory
patent: 2357110 (1944-08-01), Heineman
patent: 2437205 (1948-03-01), Middleton et al.
Fekete Douglas D.
General Motors Corporation
Rowan Kurt
LandOfFree
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