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Alarm system with interconnected alarm terminals

  • US 5,940,474 A
  • Filed: 09/21/1995
  • Issued: 08/17/1999
  • Est. Priority Date: 03/23/1993
  • Status: Expired due to Fees
First Claim
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1. An alarm installation comprisinga central alarm station andat least one alarm unit, which is placed at a location which is to be monitored, andseveral alarm terminals, which are placed at a number of monitoring locations or turn-out response locations,connection lines between both the alarm unit and the central alarm station, and between the central alarm station and the alarm terminals,characterized bymeans in the central alarm station for, upon reception of an alarm from the alarm unit through the connection lines, transmitting information thereof to alarm terminals, andmeans in the central alarm station for, after the transmission of such information to alarm terminals, establishing interconnections between each one of these alarm terminals in order to transfer information between the alarm terminals.

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