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Apparatus for communicating receipt of transmitted messages

  • US 4,354,275 A
  • Filed: 05/21/1979
  • Issued: 10/12/1982
  • Est. Priority Date: 04/14/1978
  • Status: Expired due to Term
First Claim
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1. In a communication system including a portable unit capable of transmitting a signal, a player unit capable of playing a pre-recorded emergency message, and a CB radio capable of communicating with a listener at a remote CB radio station, an apparatus comprising:

  • receiver means for producing a signal in response to receiving a signal from the portable unit;

    power supply means, coupled to the receiver means and to the CB radio, for receiving the signal produced by the receiver means, providing power, and activating the CB radio;

    interface means, coupled to the power supply means, to the CB radio and to the player unit, for activating the player unit to play the emergency message and the CB radio to transmit the emergency message in response to activation by the power supply means, for deactivating the player unit to stop playing the emergency message and the CB radio to stop transmitting the emergency message during a listening period in response to a selected signal from the player unit, and for receiving an acknowledgement signal representing a replay received by the CB radio from the listener; and

    listening circuit means, coupled to the interface means and to the power supply means, for causing the interface means to deactivate the CB radio to stop transmitting the emergency message in response to receipt during the listening period by the interface means of the acknowledgement signal indicating receipt by the listener of the transmitted emergency message.

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