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Golf yardage finder

  • US 3,868,692 A
  • Filed: 09/13/1973
  • Issued: 02/25/1975
  • Est. Priority Date: 09/13/1973
  • Status: Expired due to Term
First Claim
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1. A golf yardage distance measuring system to provide a visual read-out of the distance between a golfer and a green on a golf course, comprising in combination:

  • a plurality of transmitter units to be located at the green of each hole of a particular golf course, each transmitter adapted to radiate an RF signal outwardly from the green and over the approach fairway leading up to said green, a receiver unit to be carried by a golfer who is playing on said particular golf course, said receiver unit includes a meter read-out device and an RF signal strength detecting circuit coupled thereto to be responsive to one of said plurality of transmitter units, said read-out device being calibrated in a distance measurement corresponding to the distance measurement common to said particular golf course, said receiver unit includes an automatic gain control circuit responsive to the reception of RF signal energy transmitted from a selected one of said plurality of transmitter units, said automatic gain control circuit producing an output voltage having a value indicative of the distance between said transmitter unit and said receiver unit, said automatic gain control circuit including a calibrated meter for indicating the relative range of distances to be measured in the order of about between 0 and 200 yards;

    whereby said receiver unit is activated by a selected one of said plurality of transmitter units to provide direct indication of said read-out device of the distance of said golfer and said selected one of said plurality of trasmitter units thereby allowing the golfer to know exactly which golf club to Use for the approach shot to the green.

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