FIRE ALARM SYSTEMS WITH MONITORING DEVICE FOR FIRE ALARMS CONNECTED IN GROUPS TO A CENTRAL STATION

• US 3,530,450 A
• Filed: 05/04/1967
• Issued: 09/22/1970
• Est. Priority Date: 05/09/1966
• Status: Expired due to Term

• Current Assignee: Beat Walthard, Max Kuhn
• Original Assignee: Beat Walthard, Max Kuhn
• Inventors: WALTHARD BEAT, Kuhn, Max
• Application Number:
  US04/636,173
• Time in Patent Office: 1,237 Days
• US Class Current: 340/515
• CPC Class Codes: G08B 29/145 of fire detection circuits

Abstract

A fire alarm system including a plurality of fire alarms arranged in groups. Alarm-simulating conditions are produced in each fire alarm by an electric test signal, the response of each fire alarm being sent to an evaluation device at a central signal station through a circuit coupling the fire alarms together.

Claims