Automated ambient condition responsive daytime running light system

  • US 5,614,788 A
  • Filed: 08/01/1995
  • Issued: 03/25/1997
  • Est. Priority Date: 01/31/1995
  • Status: Expired due to Term
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First Claim
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1. An automatic ambient condition controlled daytime running light system for transport vehicles having an emergency brake, navigation lights including headlights with high and low beam filaments and parking lights, a power supply, a headlight switch for turning ON and OFF the headlights and a parking light switch for turning ON and OFF the parking lights, an ignition switch and a starter motor switch, the system comprising, a DRL control circuit having a first input from the ignition and an output to a first switching means connected to the high beam filaments for supplying power thereto, means for connecting said first switching means to the source of power, an NL control circuit, a plurality of ambient condition senors, a second input for connecting the ignition switch and outputs from said ambient condition sensors to said NL control circuit, said NL control circuit having an output connected to a second switch means for supplying power to the navigational lights, and output means from said NL control circuit connected to said DRL control circuit for extinguishing power to said first switch means when said NL control circuit is activated by signals received from said second input.

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