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EMERGENCY SIGNALLING SYSTEM HAVING MANUALLY OPERATED GENERATOR

  • US 3,866,206 A
  • Filed: 07/17/1973
  • Issued: 02/11/1975
  • Est. Priority Date: 07/17/1973
  • Status: Expired due to Term
First Claim
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1. A remote electrical signalling system comprising:

  • one or more call stations each including an electromechanical generator, transmitter means connected to be energized by said generator, receiver means connected to be energized by said generator, manually operable means for operating said generator for a substantial period of time, and switch means connected to direct an output from said generator to said transmitter means for an initial portion of the generator operating time for transmission of a call signal, and to said receiver means for a subsequent portion of the generator operating time for reception of a confirmation signal, and a home station including receiver means for reception of a call signal, and transmitter means automatically operable in response to the reception of a call signal for transmission of a confirmation signal.

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