Control system and process for a space-division switching network
US3971893A · kind A · utility
1Cited by
0References
10Claims
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Assignee
Inventors
Key dates
| Filing date | Jul 28, 1975 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Jul 28, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/0012
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.