FIRE ALARM SYSTEM HAVING A DIODE COUPLED CHECKING CIRCUIT MEANS

• US 3,564,524 A
• Filed: 05/04/1967
• Issued: 02/16/1971
• Est. Priority Date: 05/09/1966
• Status: Expired due to Term

• Current Assignee: Beat Walthard, Max Kuhn, Scheidweiler Andreas
• Original Assignee: Beat Walthard, Max Kuhn, Scheidweiler Andreas
• Inventors: WALTHARD BEAT, SCHEIDWEILER ANDREAS, Kuhn, Max
• Application Number:
  US04/636,174
• Time in Patent Office: 1,384 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-SIMULTING 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 LOGIC CIRCUIT COUPLING THE FIRE ALARMS TOGETHER.

Claims