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:
Apr. 04, 1995
Filed:
Nov. 09, 1992
Kenichi Shinbori, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an electric power supply device for supplying electric power to an electronic apparatus, while a first power source is in a state of being connectable to a first power supply path which is arranged to supply electric power directly to the electronic apparatus when the first power supply path is connected to the first power source, a second power source becomes unconnectable to a second power supply source which is arranged to supply electric power directly to the electronic apparatus when the second power supply path is connected to the second power source. While the second power source is in a state of being connectable to the second power supply path, the first power source becomes unconnectable to the first power supply path. With its simple and low-cost arrangement, the device not only effectively prevents duplex power feeding from different kinds of power sources and a voltage drop but also excels in operability and safety.