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:
Aug. 30, 1994
Filed:
Dec. 17, 1991
Manabu Araoka, Hitachi, JP;
Yoshiaki Takahashi, Mito, JP;
Atsushi Shikama, Hitachi, JP;
Yoshihiro Miyazaki, Hitachi, JP;
Tomoaki Nakamura, Katsuta, JP;
Masayuki Sakata, Takahagi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Process Computer Engineering, Inc., Hitachi, JP;
Abstract
In a data processing device, when exchanging a plug-in package with another without breaking off the power to be supplied to the data processing device, a package removing lever is equipped with a locking piece. The lever does not move and the package hence cannot be removed, until the locking piece is released. In response to the release operation of the locking piece, a switch is activated to break off the power supply for the package. After the package is mounted perfectly, the power for the package is switched on by the action of the locking piece, thus preventing any misoperation when removing the package.