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:
Mar. 27, 1979
Filed:
Dec. 22, 1977
Justus Konig, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A switching arrangement for a telecommunication switching system having test and seizing circuits is disclosed in which test switching means for bounce-free contact operation require a seizing current rise delayed by switching means in the seizing circuit. The improvement comprises a transistor for establishing the seizing current, a testing resistor disposed in series with the transistor and an RC network associated with the transistor. The potential across a control electrode of the transistor which is determined by the charging voltage of said associated RC network defines a control current. The potential renders the transistor increasingly conductive to current in accordance with a charging process setting in at the start of a test and seizing operation.