Automatic headlight and parking light switching
First Claim
1. An automatic headlight switching apparatus comprising normally open contacts which are in series between a headlight and existing switch on a switched side of a headlight switch, energizing means for closing the normally open contacts by the operator'"'"'s actuation of the headlight switch to an "on" condition from an "off" condition, means to maintain the "on" condition, disabling means electrically connected to the energizing means for disabling the energizing means and controlling means for controlling the disabling means.
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Accused Products
Abstract
Turning on either headlights or parking lights pulses a first control circuit and energizes a relay, closing normally open contacts in the light circuits. The closing of the contacts energizes a second control circuit which holds the relay on and supplies power to timers. Turning off an ignition switch starts a short headlight timer and a long parking light timer. The timers have outputs connected to disable the second control circuit and to thereby de-energize the relay. The output of the short timer is grounded through the headlights when the headlights are in a low resistance off condition.
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Citations
29 Claims
- 1. An automatic headlight switching apparatus comprising normally open contacts which are in series between a headlight and existing switch on a switched side of a headlight switch, energizing means for closing the normally open contacts by the operator'"'"'s actuation of the headlight switch to an "on" condition from an "off" condition, means to maintain the "on" condition, disabling means electrically connected to the energizing means for disabling the energizing means and controlling means for controlling the disabling means.
- 15. An automatic headlight switching method comprising closing normally open contacts which are in series between a headlight and existing switch on a switched side of a headlight switch with a relay, controlling the relay from one of the contacts and energizing the relay and closing the contacts and a second controlling of the relay from the other of said contacts, energizing the relay and maintaining the contacts closed when power is supplied to the other of said contacts, timing the second controlling with a timer, and disabling the second controlling after a time interval.
- 20. A method of switching headlights comprising supplying power to a relay energizing circuit upon closing of a headlight switch, charging a capacitor and creating a control voltage and completing a relay energizing circuit from a first contact, the capacitor and resistors connected in parallel to a relay and to a transistor for biasing the transistor on, and closing normally open contacts which are in series between a headlight and existing switch on a switched side of a headlight switch with a relay.
Specification