Nippon Telegraph and Telephone Public Corporation

Nippon Electric Co., Ltd.

Ginya Ishiguro

Hideo Suzuki

Sadayuki Mitsuhashi

Kazutoshi Wakamatsu

Norio Yano

Katsuhiro Kato

Yojiro Kishimoto

A multicontact sealed electromagnetic coordinate selection device comprises a movable contact type spring supported at both ends by supporters at a prescribed interval from a metal plate and electrically insulated from said metal plate, the movable contact type spring elastically supporting a plurality of movable contacts facing the corresponding stationary contacts formed on the upper ends of stationary contact terminals which penetrate said metal plate. The lower ends of said stationary contact terminals are supported by a magnetic metal member.

Multicontact sealed electromagnetic coordinate selection device

An electromagnetic coordinate selection device comprising a plurality of electromagnetically operated cross point switches arranged in a matrix form and a plurality of magnetic cores disposed at points corresponding to said cross point switches for operation thereof, with any desired cross point switch closed only when the first and second coils wound about the magnetic cores are additively excited wherein the magnetic cores are each of the composite type to stabilize the operation of the cross point switches and the cross point switches are collectively sealed in a single container or in groups in a plurality of vessels provided in a number equal to or smaller than the number of the conductors arranged in the direction of the row or column of said matrix.

Electromagnetic coordinate selection device

Growing community of inventors

Tokyo, Japan

Ginya Ishiguro