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Headlight, windshield wiper control system
| Details |
Inventors: Benedict, Charles E.; Stumpf, Donald M.;
Assignee: Benedict Engineering Co. Inc. (Tallahassee, FL)
Primary Examiner: Shoop, Jr.; William M.
Assistant Examiner: Ip; Paul
Attorney, Agent or Firm: Dowell & Dowell
A control system for turning on the headlights (and parking lights) of an automobile when the windshield wipers are turned on, has a gating circuit that operates relay circuits to the headlights, the gating circuit electronically latching "in" the headlight relay circuit so that the headlights remain on when the windshield wiper is turned off in order to avoid inadvertent turning off of the hedlights at night time and the gate circuit electronically turning off the headlight (and parking light) relay circuits whenever the headlight switch is turned on or whenever the ignition is turned off, thus assuring that the headlights will remain on until the headlights and ignition switches are turned off. The relay circuits controlled by the gating circuit may operate a mechanically or electrically latched relay device to hold the headlights (and parking lights) on until the relay circuit controlled by the gating circuit operates the mechanically or electrically latched relay device to turn the headlights off. Ambient light and moisture sensors may be used to effect the turning on of the windshield wiper switch. |
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DETAILED DESCRIPTION We claim: 1.
An automatic system for controlling the turning on of vehicle headlights when ignition and windshield wipers are turned on and for keeping them on when the wipers are turned off, comprising on-off switches for the ignition, wipers and headlights, a first relay circuit, a relay switch, said relay switch having means for connecting said headlights to power supply means, said first relay circuit being alternately connectable to actuating means for said relay switch which governs the connection of said headlights to said power supply means, said power supply means connected to said first relay circuit, control means for said first relay circuit, logic circuit means connecting the outputs of said ignition and headlight switches to the control means for said first relay circuit, said logic circuit means connecting the outputs of said ignition, wipers and headlights to form a latching circuit, said latching circuit producing a signal output to activate said control means for said first relay circuit to turn the headlights on when the ignition and wiper switches are turned on, said latching circuit continuing to produce such signal output when the wiper switch is turned off.
2.
The invention of claim 1, and a second relay circuit, said first and second relay circuits being alternately connectable to said operating means for said relay switch, control means for said second relay circuit, said logic circuit means connecting the outputs of said ignition, wipers and headlights to the control means for said second relay circuit which is operative to turn the headlights off in response to the turning on of the on-off switch for the headlights, or the turning off of the ignition switch.
3.
The invention of claim 2, said first relay circuit operating a mechanical latching means operative to hold the headlights turned on until the second relay circuit is activated.
4.
The invention of claim 3, said second relay circuit operating said mechanical latching means to hold the headlights turned off until the first relay circuit is activated or until the headlight switch is turned on
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I/O Systems 
