Hitachi Maxell, Limited

Kushibe Manufacturing Co., Ltd.

Unisafe Limited

Uniqey (Hong Kong) Limited

Uniqey International Ltd.

Toshihiko Yamashita

Hiroshi Fukunaga

Mitsuhiro Kishimi

Masao Morishima

A metallic porous body includes a number of protrusions formed on obverse and reverse sides of a metal sheet so as to protrude alternately with one another; each of the protrusions being formed into an truncated-shape wherein an opening portion punched out in the direction from the upper-side bottom to the lower-side bottom is formed in the upper-side bottom of each protrusion, and a vertical distance (d) between the upper-side bottom on the obverse side and the upper-side bottom on the reverse side, and a height (e) of a punched portion have a relation: 0.3&#x3c;e/d&#x3c;0.9, thereby attaining a metallic porous body without a burr or a edged convex portion on its outside surface, with a large number of fine pores arranged at fine pitch and a light-weight and robust skeleton.

Metallic porous body

Pattern for planar battery electrodes base

A method for clearing unlocking key codes in an electronic locking device in which the unlocking circuit is arranged to be actuated when the code of a magnetic card read by the card reader agrees with an unlocking key code set in the memory, the method comprising using a first clearing card which will function only when the door associated with the locking device is open and a second clearing card which will function only when the door is closed, setting the codes of the first and second clearing cards in specified separate addresses in the memory in the code setting mode for setting the codes of the clearing cards in the processing unit (CPU) of the electronic locking device, determining whether the door is open or closed in the normal operation mode of the CPU, and clearing the unlocking key codes only when the code read by the card reader is identical to the code of the first clearing card set in the above-mentioned manner and the door is open, or when the code read by the card reader is identical to the code of the second clearing card set in the above-mentioned manner and the door is closed.

Method for clearing unlocking key codes in an electronic locking device

An electronic locking device which is particularly useful for safes in a hotel room comprises an unlocking circuit actuated when a code on a magnetic card which acts as the 'key' is read by a card reader forming part of the device agrees with an unlocking code stored in the memory of the device. The unlocking code from the card is set in memory when the memory is enabled and the magnetic card is loaded into the card reader for a plurality of times within a relatively short pre-selected time interval.

Electronic locking devices

Electrical power source

A door lock in which the lock bolt is not retracted by direct action of the handles but is instead retracted by slide members acted upon by the handles, the slide members having means for engaging a further slide which carries the bolt. One of the engagement means includes an electromagnet and an engagement member. The engagement member engages the bolt carrying slide only when the electromagnet is energized, which occurs when an appropriate key has been inserted into the lock and verified.

Growing community of inventors

Osaka, Japan

Toshihiko Yamashita