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. 12, 1976
Filed:
Dec. 05, 1974
Applicant:
Inventors:
Wolfgang Frankenberg, Erlangen, DT;
Claus Lentz, Erlangen, DT;
Assignee:
Siemens Aktiengesellschaft, Munich, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323 24 ; 321 11 ; 321 / ;
Abstract
The invention concerns a monitoring circuit for a number of simultaneously current-carrying valves. In order to obtain an alarm signal in the event of trouble in a valve, provision is made that the primary winding of a current transformer is arranged in series with each of the valves; that the secondary windings of the current transformers are connected in a ring via intermediate taps; and that each intermediate tap is connected to a center tap of a bridge circuit constructed from auxiliary valves, whose output current can be taken off as the alarm signal.