Automatic control system for automobile lights

  • US 4,665,321 A
  • Filed: 08/14/1985
  • Issued: 05/12/1987
  • Est. Priority Date: 08/14/1985
  • Status: Expired due to Fees
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First Claim
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1. A control system for automatically actuating and deactuating the lights of an automobile in response to light conditions, comprisinga voltage divider having a light sensing means connected in series with a current coil of a first relay means, said light sensing means being connected to a first terminal means operative for connecting to a negative electrode of a voltage supply battery, said first relay means having switching contacts operative to conduct current to a current coil of a second relay means, said second relay means having switching contacts operative for conducting current to said lights of the automobile, said first relay means operative in response to said light sensing means detecting a first predetermined ambient light condition to establish on ON state wherein said switching contacts of said first relay means are closed for conducting current to flow to said current coil of said second relay means, and said first relay means in response to said light sensing means detecting a second predetermined ambient light condition to establish an OFF state wherein said switching contacts of said first relay means are opened for terminating current flow to said current coil for said second relay means,an adjustable resistor means connected in series to said first relay means,a timer means connected in series to said adjustable resistor means and operative to delay energization of said first relay means and light sensing means for a predetermined time period, said timer means being connected to a second terminal means operative for connecting to a positive electrode of said voltage supply battery,a first diode means connected to said light sensing means and to said first terminal means, anda second diode means connected to said timer means and to said adjustable resistor means.

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