Secondary ignition lead structure

Details Secondary ignition lead structure Secondary ignition lead structure

1994-12-13

1997-04-29

Kincaid, Kristine L.

Electricity: conductors and insulators

Conduits, cables or conductors

Conductive armor or sheath

174106R, 174107, H01B 722

Patent

active

056251688

ABSTRACT:
A high-voltage lead intended for use in ignition systems of engines, typically large engines, the lead having an inner insulated conductor surrounded either by an inner conductive sleeve and an outer insulating sleeve, or by a single insulating sleeve with a conductive layer on its inner surface. The conductive sleeve or conductive layer, which is preferably non-metallic, provides shielding but permits the use of conventional pickup devices to detect electrical pulses in the lead and thereby monitor engine performance with the use of a timing light, oscilloscope or similar device. The presence of two insulating layers provides a desired measure of safety in the presence of an explosive gas and air mixture. The conductive layer provides both shielding and static electricity discharge. The structure of the invention is less expensive than ignition leads with conventional braided stainless steel shielding, and requires less effort and cost to maintain in safe condition.

REFERENCES:
patent: 3287489 (1966-11-01), Hvizd, Jr.
patent: 3327050 (1967-06-01), Barrie
patent: 3790697 (1974-02-01), Buckingham
patent: 4499438 (1985-02-01), Cornelius et al.
patent: 4861945 (1989-08-01), Buck et al.
patent: 4960965 (1990-10-01), Redmon et al.
patent: 5220130 (1993-06-01), Walters

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