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:
Dec. 07, 1982
Filed:
Jul. 18, 1980
Alfred Ziegler, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
Method and apparatus for start-up of reciprocal remote supply feeding of intermediate stations utilizing DC current series feeding. In the operation of remote feeding systems of this type, the switch-on operation for reasons of safety for the individuals, must be accomplished only after testing the remote feeding circuit for freedom of faults. For this purpose the invention provides a test current circuit delivered by one feed circuit which triggers a transmission and delivery of a remote feed current in the other feed circuit which in turn causes in the first feed circuit a change-over switch to operate to switch from test current to remote feed current. The apparatus and method is particularly suitable for the remote feeding of intermediate amplifiers in transmission line sections of communication engineering systems.