×

VEHICLE LOCATOR SYSTEM

  • US 3,568,161 A
  • Filed: 09/04/1968
  • Issued: 03/02/1971
  • Est. Priority Date: 09/04/1968
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for monitoring the locations of a plurality of vehicles within a prescribed area, said system comprising:

  • a plurality of signal transmitter means, one each carried by a respective one of said plurality of vehicles, for continuously emitting signals which are individually coded to identify the vehicle from which the emitted signal originates;

    a plurality of sensor stations disposed at preselected locations within said prescribed area, each sensor station including means for receiving emitted signals from respective vehicles located within a predetermined distance from that sensor station and for providing a receiver output signal in response to each emitted signal received, said receiver output signal being coded to identify the vehicle from which that emitted signal was received;

    decoder means responsive to application thereto of a receiver output signal for providing a digital signal which is coded to identify the respective applied receiver output signal;

    scanning means for continuously and sequentially scanning said sensor stations and applying receiver output signals appearing at a station being scanned to said decoder means; and

    data processing means synchronized with said scanning means and responsive to said digital signals for storing information representing the location of said plurality of vehicles, said information relating each vehicle to the respective sensor station which was the most recent sensor station to receive the emitted signal from that vehicle.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×