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:
May. 25, 1976
Filed:
Dec. 11, 1974
Applicant:
Inventor:
Ernst Landsberg, Bergisch-Gladbach, DT;
Assignee:
Walther & Cie Aktiengesellschaft, Cologne-Dellbrueck, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A62C / ;
U.S. Cl.
CPC ...
169 43 ; 169 20 ; 169 23 ;
Abstract
A sprinkler system having a pressurized sprinkler conduit which is separated from a water supply by a normally closed valve, and a fire alarm system having a circuit which is connected with this valve and opens the same in response to the detection of a fire by the circuit, is operated by detecting the absence of electrical energization of the fire alarm circuit, and thereupon operating the sprinkler system as a function of pressure losses in the sprinkler conduit rather than as a result of the operation of the fire alarm system.