Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1974-06-19
1976-04-27
Harris, G.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
200175, H01H 6714
Patent
active
039538133
ABSTRACT:
An electromagnetic matrix switch device, suitable for use in an automatic exchange or computer, comprising a two-dimensional array of cross-point elements, each of which comprises a magnetically actuated switch adapted to bridge its associated pair of row and column signal lines and a magnetic core positioned in magnetically-coupled relationship to the switch to actuate it in response to a current pulse applied to its associated pair of row and column control lines. Each magnetic core has provided therearound first and second windings connected to its associated row control line and third and fourth windings connected to its associated column control line, the polarity of those windings being such that application of the current pulse to the row and column control lines will cause the first and fourth windings to produce magnetic fields in a direction opposite to those produced by the second and third windings. Provision is made for short-circuiting the second and third windings of each magnetic core simultaneously with the application of the current pulse to a selected pair of the control lines, whereby only the magnetic core located at the intersection of the selected pair of the control lines produces a magnetic field sufficient to actuate its associated switch.
REFERENCES:
patent: 3464039 (1969-08-01), Takamura et al.
patent: 3487344 (1969-12-01), Takamura et al.
Mitsuhashi Sadayuki
Okoshi Seiei
Suzuki Norio
Yano Norio
Harris G.
Nippon Electric Company Limited
Nippon Telegraph & Telephone Public Corporation
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