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:
Sep. 14, 1982
Filed:
Oct. 01, 1980
Sai W Kwok, El Paso, TX (US);
GTE Automatic Electric Laboratories, Inc., Northlake, IL (US);
Abstract
In an amplifier station for a trunk system, switching apparatus responsive to the absence or presence of a control signal selectively passes R. F. signals in a prescribed frequency band on a main transmission line to first and second lines. During normal operation of the amplifier relay coils are energized so as to engage second and third contacts for passing signals on the second line with amplification. When the amplifier is operating properly, PIN diodes short opposite ends of the first line for improving isolation in the station equipment. In the event of amplifier malfunction, first and third contacts are engaged thereby providing transmission along the first line. A tubular conductive member surrounds the switch contacts so as to provide capacitive coupling thereto. The tubular member is capacitively coupled to a ground plane to thereby by-pass signals which are above the desired passband of the trunk system.