Electric lamp and discharge devices – Spark plugs – Ring or disk electrode
Patent
1979-04-12
1981-05-12
Demeo, Palmer C.
Electric lamp and discharge devices
Spark plugs
Ring or disk electrode
313141, H01T 1332
Patent
active
042674816
ABSTRACT:
A spark plug for internal combustion engines, both two-stroke and four-stroke cycle, in which the insulating core, the central electrode and the conductive metal casing which carries the insulating member and electrode together with the gasket or sealing structure are essentially identical to conventional spark plugs. The projecting portion of the central electrode and the "ground" electrode have a structural and functional relationship different from commercially available plugs. The central electrode projects from the inner end of the metal spark plug casing and the ground electrode, made from a thin flat strip of conventional ground electrode material, has a substantially greater length than that of normal plugs. The ground electrode projects further into the combustion chamber than does the center electrode and is reverse bent to place a relatively long extent of gap area parallel to the projected portion of the central electrode, which configuration maintains the ground electrode body at a same high temperature all along the length of the gap. The thin, or "sharp", edge of the flat ground strip, at the gap area, is arranged normal to a plane through the sparking part of the ground electrode and the axis of the central electrode resulting in an even, intense sparking and corona effect and better ionization of gases all along the gap which provides more complete ignition, eliminates carbonizing and results in cleaner and efficient burning of the combustion charge.
REFERENCES:
patent: 1041835 (1912-10-01), McIntyre
patent: 1087897 (1914-02-01), Talbert
patent: 1138797 (1915-05-01), Schmidt
patent: 1306304 (1919-06-01), Herz
patent: 1335793 (1920-04-01), Olson
patent: 1492515 (1924-04-01), Johns
patent: 1533979 (1925-04-01), Euler
patent: 1538870 (1925-05-01), Champion
patent: 2097460 (1937-11-01), Innes, Jr.
patent: 2845566 (1958-07-01), Regar
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