Spark plug with central electrode attachment member containing p

Details Spark plug with central electrode attachment member containing p Spark plug with central electrode attachment member containing p

1991-08-06

1992-04-21

DeMeo, Palmer C.

Electric lamp and discharge devices

Spark plugs

Plural parallel gaps

313141, H01T 1320, H01T 1332, H01T 1346

Patent

active

051071681

ABSTRACT:
A sparking plug with a central electrode insulated in respect of the plug screw-thread and with earth electrodes which are electrically connected to the plug screw-thread, there being at the combustion chamber end of the central electrode an attachment part which consists at least partially of platinum or a platinum alloy, the spark gaps being disposed between it and the earth electrodes which extend to it from the side. According to the invention, the attachment part takes the form of a prism, the top surface of which faces the combustion chamber. Furthermore, the earth electrodes extend laterally alongside the side faces of the substantially prismatic attachment member parallel with the edges of top or base surfaces of the prism. This ensures considerable stability and low burn-off. Furthermore, the electrode gap can easily be adjusted.

REFERENCES:
patent: 892285 (1908-06-01), Moonen et al.
patent: 2314128 (1943-03-01), Coldwell
patent: 2318922 (1943-11-01), Carington
patent: 2391456 (1945-12-01), Hensel
patent: 2640474 (1953-06-01), Phillips
patent: 3548239 (1970-12-01), Eaton
patent: 4122366 (1978-10-01), von Stutterheim
patent: 4700103 (1987-10-01), Yamaguchi et al.

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