Seikosha Co., Ltd.

Seiko Precision Inc.

Kabushiki Kaisha Toshiba

Akio Takeda

Toshiro Saeki

Akihiko Matsuo

Yatsutoshi Chiba

Satoru Matsumoto

Kiyoshi Fujii

Yasuhiro Kurosawa

Kazuhiro Horie

Aijiro Gohara

Takahiro Miyakoshi

An inward deformation of one side wall of a main body is corrected, since a shaft serving as a rotatable shaft of a door is in contact with ribs of a side wall. Additionally, an inward deformation of another side wall of the main body is corrected, since ribs of a side wall of door are in contact with side wall.

Case and time recorder

Time recorder

A fault locator of a parallel transmission line includes a data receiving unit that receives the transmission and the received signal of each current differential relay provided with the transmission line, and measures the receiving timing of the transmission signal from a self-terminal. A fault detecting unit judges fault detection on the transmission line based on current data received with the data receiving unit, and outputs a starting signal. A data memory unit stores a predetermined fault generating range of a quantity of electric data of each self-terminal previously stored and an other side terminal when the quantity of electric data of each self terminal received with the data receiving unit and the other side terminal are stored and a starting signal is received. A synchronous correction unit, based on information on the receiving timing measured with the data receiving unit at the time of data reception of a self-terminal transmission signal, performs synchronous correction processing between each line to the stored memory. A setting unit inputs an impedance value and the line-length for three-phases as a setting value. A fault location unit performs fault location, using impedance setting for three-phases and line-length setting which were set with the stored memory data and the setting unit and the synchronous correction processing between each line that was performed in the synchronous correction unit.

Growing community of inventors

Tokyo, Japan

Akio Takeda