The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1983
Filed:
Mar. 15, 1982
Applicant:
Inventor:
Lennart Claussen, Karlskoga, SE;
Assignee:
Aktiebolaget Bofors, Bofors, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340510 ; 169 23 ; 169 41 ; 169 61 ; 340661 ;
Abstract
In a fire sprinkler system a plurality of physically distributed actuators are connected in a normally balanced bridge circuit. The bridge circuit is impressed with a pulsed measuring voltage thereacross to conserve power. LEDs are connected to the bridge for indicating either normal or unbalanced conditions of the bridge as well as indicating which actuator branch of the bridge is causing unbalance.