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Emergency roadside telephone system

  • US 4,176,254 A
  • Filed: 12/27/1977
  • Issued: 11/27/1979
  • Est. Priority Date: 12/27/1977
  • Status: Expired due to Term
First Claim
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1. An emergency telephone terminal for use in an emergency roadside telephone system to communicate with a central station comprisingtransmitter means and receiver means for communicating with the central station;

  • a handset having a receiver and a transmitter and being movable between on-hook and off-hook positions;

    first circuit means for connecting said handset transmitter with said transmitter means and said handset receiver with said receiver means when said handset is in said off-hook position;

    a plurality of emergency switches symbolically marked with pictorial symbols to correspond to various emergency conditions and adapted to be manually actuated; and

    second circuit means responsive to said handset being in said off-hook position for coupling said emergency switches with said transmitter means whereby said emergency telephone terminal permits voice and emergency switch communications with said central station.

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