Automatic headlight dimmer apparatus

Details Automatic headlight dimmer apparatus Automatic headlight dimmer apparatus

1990-10-15

1992-02-04

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Special application

Vehicle

315 82, 315159, 307 108, B60Q 114

Patent

active

050862537

ABSTRACT:
An apparatus within a vehicle including a plurality of high beams in electrical communication with an automatic circuit to direct voltage to each associated high beam, wherein a photo-transistor is arranged in parallel circuitry to a relay coil and resistor, with the junction transistor arranged to interface between the first and the second parallel circuit, including the photo-transistor and adjustable resistor respectively. A modified detector circuit includes a second resistor in series with the resistor, and a third resistor in parallel relationship to the relay coil to effect a time delay in actuation of the high beam members of the vehicle. A third junction transistor is arranged in a third circuit parallel to the first and second circuit to direct current to the respective high beam for increased sensitivity relative to the incoming light source from a remote vehicle.

REFERENCES:
patent: 2853651 (1958-09-01), Jacobs
patent: 2959709 (1960-11-01), Vanaman et al.
patent: 3011092 (1961-11-01), Deuth
patent: 3274434 (1966-09-01), Miller
patent: 3775639 (1973-11-01), Woodward
patent: 4665321 (1987-05-01), Chang et al.

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