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US 4,236,099 AGranted
Automatic headlight system
OwnerIrving Rosenbluminventor
Life of this patent
Estimating the term…
Abstract
There is disclosed an automatic light system for a moving vehicle wherein there is provided an on/off control feature responsive to ambient light conditions and responsive to the activation of windshield wipers. Included in the on/off control feature is electronics for a built in delay to delay changes in the on/off condition of the headlights caused by sudden or gradual darkness, sudden or gradual light, and the starting of the vehicle. The automatic light system includes a high/low beam control feature which is responsive to oncoming or passing cars.
Claims6
An automatic light system for controlling the light emission of a vehicle headlight, comprising:
- light sensor means disposed within the darkened engine compartment of said vehicle to receive ambient light,
- control means for automatically turning on or off the headlight in response to detected light level signals from said light sensor means when said light level signals are within predetermined light level ranges,
- delay means for preventing the turning on or off of the headlight if the detected light level signals do not stay within the predetermined light level ranges for a predetermined period of time,
- polarity switching means connected between said vehicle headlight and the poles of an electric power source, for selectively switching the polarity of the voltage applied by said power source to said headlight,
- whereby on and off control of the headlight is accomplished without being affected by momentary, sudden darkness or light and additional battery drain during vehicle starting is prevented.
2 more elements
Dependencies are inferred from the claim text.