Electric lamp and discharge devices: systems – Special application – Vehicle
Patent
1987-09-09
1989-05-16
Moore, David K.
Electric lamp and discharge devices: systems
Special application
Vehicle
315 82, 315 83, 315 76, 307 108, B60Q 102
Patent
active
048313106
ABSTRACT:
Apparatus for causing an external light system of a motor vehicle to be actuated when the vehicle engine is running, the vehicle having an electrical battery associated with the engine, and the running of the engine causing an AC signal to appear with a DC component at a terminal of the battery. The apparatus has an electrical circuit with a filter for filtering the DC component from the AC signal to provide a filtered AC signal indicating an engine running condition. The filtered AC signal or other engine running signal obtained from the filtered AC signal is compared with a predetermined value and an actuating signal is provided when the engine running signal is above the predetermined value. An actuator responsive to receipt of the actuating signal causes the external light system of the vehicle to be turned on.
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patent: 3702415 (1972-11-01), Schultz
patent: 3706006 (1972-12-01), Miller, Jr.
patent: 3774071 (1973-11-01), Goodrich
patent: 3775640 (1973-11-01), English
patent: 3798500 (1974-03-01), Florence et al.
patent: 3909619 (1975-09-01), Kniesly et al.
patent: 3963940 (1976-06-01), Adamian
patent: 4117453 (1978-09-01), Hodgson et al.
patent: 4376909 (1983-03-01), Tagami et al.
Heintzberger Antonius H.
Melia John
Delbridge Robert F.
Fors Arne I.
Moore David K.
Razavi Michael
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