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HIGHWAY VEHICLE SENSOR SYSTEM

  • US 3,641,569 A
  • Filed: 10/01/1970
  • Issued: 02/08/1972
  • Est. Priority Date: 10/01/1970
  • Status: Expired due to Term
First Claim
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1. A highway vehicle sensor comprising a. a field generating element having two extended legs adapted to be spaced along a highway;

  • b. means for energizing said main element to produce a field around each leg of a magnitude to project above the surface of such highway; and

    c. a probe located closely adjacent each of said legs, each such probe being adapted to generate a signal upon a variation in the field of its adjacent side leg produced by the presence of a vehicle in the immediate proximity of said leg.

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