US3370272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay diode preference lock-out circuit
Assignee: Nortel Networks Ltd
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Filing: 1963-10-29
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Granted: 1968-02-20
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Expires: 1983-10-29
Abstract
No abstract record available.
Inventors
- 👤 Kenedi Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:33
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A CIRCUIT FOR CONNECTING ONE OF A FIRST AND SECOND TERMINALS TO A COMMON TERMINAL, WHEREIN SAID FIRST AND SECOND TERMINALS DEVELOP A REFERENCE POTENTIAL WHEN REQUESTING CONNECTION TO SAID COMMON TERMINAL, WHICH COMPRISES, A RELAY FOR EACH SAID FIRST AND SECOND TERMINALS, A FIRST PAIR OF CONTACTS OPERATED BY EACH RESPECTIVE RELAY FOR CONNECTING THE RESPECTIVE TERMINALS TO SAID COMMON TERMINAL, A CURRENT SOURCE FOR ENERGIZING EACH SAID RELAY UPON ESTABLISHMENT OF SAID REFERENCE POTENTIAL BY ITS RESPECTIVE TERMINAL, AND PRIORITY ESTABLISHING MEANS FOR ONE OF SAID FIRST AND SECOND TERMINALS COMPRISING, REFERENCE POTENTIAL SHUNTING MEANS FOR INHIBITING CURRENT SUPPLY BY SAID CURRENT SOURCE TO RELAY OF THE TERMINAL OF LOWER PRIORITY WHEN SAID TERMINAL OF HIGHER PRIORITY IS DEVELOPING ITS REFERENCE POTENTIAL.
Claim 2
Dependent Claim
124 words
A CIRCUIT FOR CONNECTING ONE OF A FIRST AND SECOND TERMINALS TO A COMMON TERMINAL, WHEREIN SAID FIRST AND SECOND TERMINALS DEVELOP A REFERENCE POTENTIAL WHEN REQUESTING CONNECTION TO SAID COMMON TERMINAL, WHICH COMPRISES, A RELAY FOR EACH SAID FIRST AND SECOND TERMINALS, A FIRST PAIR OF CONTACTS OPERATED BY EACH RESPECTIVE RELAY FOR CONNECTING THE RESPECTIVE TERMINALS TO SAID COMMON TERMINAL, A CURRENT SOURCE FOR ENERGIZING EACH SAID RELAY UPON ESTABLISHMENT OF SAID REFERENCE POTENTIAL BY ITS RESPECTIVE TERMINAL, AND PRIORITY ESTABLISHING MEANS FOR ONE OF SAID FIRST AND SECOND TERMINALS COMPRISING, REFERENCE POTENTIAL SHUNTING MEANS FOR INHIBITING CURRENT SUPPLY BY SAID CURRENT SOURCE TO RELAY OF THE TERMINAL OF LOWER PRIORITY WHEN SAID TERMINAL OF HIGHER PRIORITY IS DEVELOPING ITS REFERENCE POTENTIAL.
References Cited (Backward Citations)
US2682814A
Cited
US3010053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |