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A remotely controllable position indicator system

  • US 5,009,501 A
  • Filed: 07/27/1989
  • Issued: 04/23/1991
  • Est. Priority Date: 11/27/1986
  • Status: Expired due to Fees
First Claim
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1. A remotely controllable position indicator system, comprising a movable remote control device controllable to transmit command radiation signals, and a fixed reference station adapted to execute commands represented by said command radiation signals, said remote control device further comprising two transmitters forming one directional transmitter and said fixed reference station further comprising a receiver, means for monitoring intensity of radiation received by said receiver, means for distinguishing between radiation from one of said two transmitters and radiation from the other of said two transmitters and computer means programmed to determine the direction of said reference station from said remote control device using a comparison of monitored intensity of radiation received by said receiver from each of said two transmitters of said directional transmitter to give the direction of said receiver from said directional transmitter, in which one or more of said two transmitters is controllable to transmit radiation command signals and said receiver is arranged to receive said command signals, including switching means for said one or more of said two transmitters to initiate radiation command signals to enable an operator to selectively point at a target and then issue a command radiation signal for execution by said reference station.

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