Electromagnetic coordinate switching device
AssigneeNippon Electric Co., Ltd.
InventorsSadayuki Mitsuhashi, Norio Suzuki, Kazuyoshi Nago
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Abstract
A divisional excitation type coordinate switching device featuring a single magnetic shunt plate and preformed elongate excitation coils arranged on the top and bottom sides thereof and each surrounding a row or column of switching elements. Terminal blocks are secured to the four sides of the shunt plate, enabling arrangement of component parts in a fully developed formation. Outstanding among the advantages gained are substantial reduction in winding cost and overall size, ease of assembling and improved operational reliability.
Claims9
An electromagnetic coordinate switching device of the divisionally excited type comprising;
- a plurality of switching means, each with two ends, having a magnetic self-holding action such that said means conducts only when both ends are in magnetic fields having the same orientation;
- a magnetic shunt means having sides, and a top and bottom with through apertures therebetween, said apertures arranged in rows and columns such that the apertures are located at the crosspoints of said rows and columns, at least one of said switching means being inserted in each of said apertures such that a magnetic field at one end of the switch is not felt at the other end;
- a plurality of first elongated coil means each having two leads, surrounding each of said rows on the top of said shunt means with a space between said coil means and said shunt means such that a second elongated coil means can be placed therebetween, said first elongated coil means selectively operable to apply a magnetic field simultaneously, in a direction away from said shunt means, to the switching means contained in said row;
- a plurality of second elongated coil means each having two leads, surrounding each of said columns, in the space between said first elongated coil means and said shunt means, selectively operable to apply a magnetic field simultaneously, in a direction toward the shunt means, to all of said switching means in said column;
- a plurality of third elongated coil means having two leads, surrounding each of said rows on the bottom of said shunt means selectively operable to apply a magnetic field simultaneously, in a direction away from said shunt means, to all of said switching means in said row;
- a plurality of fourth elongated coil means each having two leads, surrounding each of said columns on the bottom of said third coil means selectively operable to apply a magnetic field simultaneously, in a direction toward the shunt means, to the switching means contained in said row;
- and
- a plurality of magnetic shield means arranged between adjacent first excitation coils and adjacent fourth excitation coils to insulate each coil from any magnetic field caused by adjacent coils.
Dependencies are inferred from the claim text.