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AssigneeNippon Telegraph & Telephone Public Corporation
InventorsKatsuhiro Kato, Hideo Suzuki, Norio Yano, Yojiro Kishimoto, Ginya Ishiguro
Estimating the term…
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.
An electromagnetic coordinate selection device comprising a plurality of cross point switches each provided with a stationary contact member and movable contact member and arranged in a matrix form to carry out electrical connection and disconnetion between the row and column conductors, a plurality of magnetic cores disposed at points corresponding to the cross point switches to drive the movable contact members, a first coil wound about the respective magnetic cores to introduce selection current of at least one of a row and column, and a second coil wound about said magnetic cores to transmit selection current of at least one of a column and row, respectively, wherein the magnetic core is of the composite type comprising a first magnetic core member generating a sufficient amount of coercive force to latch the movable contact members and a second magnetic core member providing a larger amount of coercive force than the first magnetic core member;
Dependencies are inferred from the claim text.