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:
Jun. 30, 1987
Filed:
Apr. 09, 1983
Ryuichi Kajiyama, Inazawa, JP;
Ryoji Takahashi, Ichinomiya, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In this invention, 'column' buses connected to a power supply and 'row' input lines are arranged in the shape of a matrix, external signal lines are connected to the intersection points thereof, and the 'column' buses are switched at predetermined cycles by the signals of a sequence circuit so as to sequentially apply the signals of the external signal lines from the 'row' input lines to signal inputting circuits, and when any of the 'column' buses, 'row' input lines and external signal lines has grounded, the operation of the sequence circuit is ceased during the grounding. Accordingly, the apparatus can sharply reduce the number of signal lines, and it can eliminate the labor of maintenance owing to a reliability higher than that of an apparatus employing a fuse.