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Emergency dialer system

  • US 4,417,100 A
  • Filed: 07/06/1981
  • Issued: 11/22/1983
  • Est. Priority Date: 07/06/1981
  • Status: Expired due to Fees
First Claim
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1. An emergency dialer system comprising an emergency circuit, means for triggering a start signal to activate said emergency circuit, means in said emergency circuit for automatically dialing a predetermined telephone number to cause the telephone at said predetermined telephone number to ring, means for applying a predetermined emergency signal on the telephone line of said predetermined number, first timing means for applying said emergency signal on said telephone line for a first predetermined time interval, means for connecting a busy circuit to said first timing means to inhibit further triggering of new start signals, said first timing means interrupting the emergency signal at the end of said first predetermined time interval to permit verification of an emergency, said verification interruption being for a second predetermined time interval, means for resuming the automatic dialing if there is no verification within said second predetermined time interval, said automatic dialing and subsequent verification interruption being repeated until verification occurs.

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