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.

Date of Patent:
Aug. 31, 1982

Filed:

Mar. 26, 1980
Applicant:
Inventors:

Yukinobu Ishigaki, Machida, JP;

Hideaki Ozaki, Sagamihara, JP;

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
3408255 ; 367198 ;
Abstract

Apparatus for automatic selective switching and transmitting of input signals in which switching circuits are provided for respective transmitting systems of a plurality of input signals. The switching circuits undergo opening and closing operations to carry out non-transmitting and transmitting of signals. Input signal detection circuits are supplied with said input signals and detect the same to produce detected signals. A circuit for forming control signals is supplied with the detected signals and forms control signals for closing the switching circuit provided for the transmitting system of an input signal which has arrived and causes the switching circuits of the other transmitting systems to open or to remain opened.


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