Control system and process for a space-division switching networ

Details Control system and process for a space-division switching networ Control system and process for a space-division switching networ

1975-07-28

1976-07-27

Claffy, Kathleen H.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340166S, H04Q 900

Patent

active

039718930

ABSTRACT:
Controls are provided for a space-division switching network with relay crosspoint matrices, each crosspoint having four switching coils or windings. A crosspoint relay is switched when two pairs of pulses are provided simultaneously, one pulse to each winding. The switch control arrangement (called the selection unit) for each row and column conductor includes two thyristors, one at each end of the row or column with rows and columns being paired, the pairing being with columns or rows in other planes of the stage.

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