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:
Jan. 26, 1993
Filed:
Jun. 14, 1991
Yasuo Ohkubo, Miyoshi, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An apparatus which is inserted in a signal transmission path between a network communications cable and a sending and receiving circuit. The apparatus enables switching of the connection polarity of the communications cable. This apparatus has an idle status detection section, a judgment section which responds to an idle status detection of the idle status detection section and judges the polarity of the communications cable on the basis of a signal level of the communications cable, and a polarity switching section which switches the polarity of the signal send and receive in accordance with a polarity indicated by polarity judgment signals output from the judgment portion. The use of this apparatus eliminates the necessity to recognize the polarity when connection work is performed, and simplifies the connection work itself.