Patent US3792200A successfully refreshed from Google Patents.
US3792200A
Expired / Lapsed
US
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Matrix switching network control link interconnection circuit
Assignee: Telent Technologies Services Ltd
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Filing: 1972-11-03
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Granted: 1974-02-12
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Expires: 1992-11-03
Abstract
Abstract Matrix connector circuits for connection in series with separate groups of control links of a matrix switching network at the point at which the control links define unique paths between circuits connected to opposite ends of the network. The matrix connector circuits initially complete all the control links during the initial scanning steps in a path finding sequence. In the last scanning step, all the matrix connector circuits open all the control links while a selected matrix connector allows the scanning of its control links and allows the application of energization signals to opposite portions of a selected control link to complete the corresponding unique path through the network.
Inventors
- 👤 O Altenburger
- 👤 R Bansemir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:13
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
230 words
An electrical circuit for connection in series with the control link connections of a matrix switching network comprising: first, second, third and fourth plurality of terminals; first relay means including a plurality of normally open contacts; a second relay means including a plurality of normally open contacts and a plurality of normally closed contacts; first circuit means connecting individual ones of the normally open contacts of said first relay means in a series circuit with individual ones of the normally closed contacts of said second relay means between separate ones of said first and second terminals to provide a plurality of switching circuits for connection in series with the link connections; second circuit means for connecting separate ones of said third plurality of terminals to individual ones of said first plurality of terminals through separate ones of the normally open contacts of said second relay means; third circuit means for connecting separate ones of said fourth plurality of terminals to individual ones of said series circuits at the junction of the normally open contacts of said first relay means and the normally closed contacts of said second relay means; fourth circuit means for receiving signals for operating said first relay means, and fifth circuit means for receiving signals for operating said second relay means so that the first relay means is maintained operated while said second relay means is operated.
Claim 2
Dependent Claim
230 words
An electrical circuit for connection in series with the control link connections of a matrix switching network comprising: first, second, third and fourth plurality of terminals; first relay means including a plurality of normally open contacts; a second relay means including a plurality of normally open contacts and a plurality of normally closed contacts; first circuit means connecting individual ones of the normally open contacts of said first relay means in a series circuit with individual ones of the normally closed contacts of said second relay means between separate ones of said first and second terminals to provide a plurality of switching circuits for connection in series with the link connections; second circuit means for connecting separate ones of said third plurality of terminals to individual ones of said first plurality of terminals through separate ones of the normally open contacts of said second relay means; third circuit means for connecting separate ones of said fourth plurality of terminals to individual ones of said series circuits at the junction of the normally open contacts of said first relay means and the normally closed contacts of said second relay means; fourth circuit means for receiving signals for operating said first relay means, and fifth circuit means for receiving signals for operating said second relay means so that the first relay means is maintained operated while said second relay means is operated.
Claim 3
Dependent Claim
33 words
An electrical circuit as defined in claim 1 wherein said third circuit means includes a separate diode connected in series between individual ones of said fourth plurality of terminals and said series circuits.
Claim 4
Dependent Claim
32 words
An electrical circuit as defined in claim 2 wherein said fifth circuit means connects said first relay means to said third circuit means through normally open contacts of said second relay means.
References Cited (Backward Citations)
US3546387A
Cited
US3621147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |