US3129293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telecommunication switching systems
Assignee: Associated Electrical Industries Ltd
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Filing: 1961-08-30
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Granted: 1964-04-14
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Expires: 1981-08-30
Abstract
No abstract record available.
Inventors
- 👤 Warman Bloomfield James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:32
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A MULTI-STAGE RELAY CROSS-POINT SWITCHING SYSTEM HAVING ITS CROSS-POINTS DEFINED BETWEEN MULTIPLES INCLUDING CONTROL CONDUCTORS AND HAVING ITS STAGES CONNECTED BY LINKS INCLUDING CORRESPONDING CONTROL CONDUCTORS, A RELAY FOR EACH CROSS-POINT HAVING AN OPERATING WINDING AND A MAKE CONTACT CONNECTED IN SERIES WITH EACH OTHER BETWEEN THE CONTROL CONDUCTORS OF THE MULTIPLES DEFINING THE CROSS-POINT, MARKING CONNECTION EXTENDING FROM THE JUNCTION BETWEEN THE SAID WINDING OF EACH RELAY AND ITS SAID MAKE CONTACT AND INCLUDING A UNIDIRECTIONALLY CONDUCTIVE DEVICE AND CONTROL CIRCUIT MEANS HAVING SAID MARKING CONNECTIONS EXTENDING THERETO AND CAPABLE OF CONTROLLING, IN RESPECT OF ANY COMMUNICATION PATH THROUGH SUCCESSIVE STAGES, THE ESTABLISHMENT BY WAY OF SAID CONTROL CONDUCTORS AND OF THE CONTROL CONDUCTORS IN THE LINKS
Claim 2
Dependent Claim
119 words
IN A MULTI-STAGE RELAY CROSS-POINT SWITCHING SYSTEM HAVING ITS CROSS-POINTS DEFINED BETWEEN MULTIPLES INCLUDING CONTROL CONDUCTORS AND HAVING ITS STAGES CONNECTED BY LINKS INCLUDING CORRESPONDING CONTROL CONDUCTORS, A RELAY FOR EACH CROSS-POINT HAVING AN OPERATING WINDING AND A MAKE CONTACT CONNECTED IN SERIES WITH EACH OTHER BETWEEN THE CONTROL CONDUCTORS OF THE MULTIPLES DEFINING THE CROSS-POINT, MARKING CONNECTION EXTENDING FROM THE JUNCTION BETWEEN THE SAID WINDING OF EACH RELAY AND ITS SAID MAKE CONTACT AND INCLUDING A UNIDIRECTIONALLY CONDUCTIVE DEVICE AND CONTROL CIRCUIT MEANS HAVING SAID MARKING CONNECTIONS EXTENDING THERETO AND CAPABLE OF CONTROLLING, IN RESPECT OF ANY COMMUNICATION PATH THROUGH SUCCESSIVE STAGES, THE ESTABLISHMENT BY WAY OF SAID CONTROL CONDUCTORS AND OF THE CONTROL CONDUCTORS IN THE LINKS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |