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Automatic police emergency locator system

  • US 4,197,497 A
  • Filed: 09/23/1977
  • Issued: 04/08/1980
  • Est. Priority Date: 09/23/1977
  • Status: Expired due to Term
First Claim
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1. In an emergency communication system having a mobile two-way radio, remote-controlled means for switching said radio from a receiving mode to a transmitting mode to broadcast messages, a message recorder and player assembly rendered operative to alternately execute recording and replay operations, and timer means connected to the remote-controlled means for rendering the recorder and player assembly operative during a timing cycle of preselected duration to replay the recorded messages under said replay operation for broadcast through the radio in the transmitting mode;

  • the improvement residing in switching control means for simultaneously rendering the recorder and player assembly operative to record said messages while supplying a corresponding audio modulating signal to the radio for broadcast of the messages during the recording operations, an alert signal generator, and means connecting the signal generator to the recorder and player assembly for recording an alerting signal simultaneously with said recording of the messages, whereby the alerting signal distinguishes the broadcast of the messages during the replay operations from the broadcast of the messages during the recording operations.

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