US3119063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission line terminating impedance distinguishing circuit
Assignee: General Dynamics Corp
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Filing: 1961-01-13
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Granted: 1964-01-21
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Expires: 1981-01-13
Abstract
No abstract record available.
Inventors
- 👤 Brightman Barrie
- 👤 Jr J Carter Perkins
- 👤 Scott Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
121 words
IN A SIGNALING SYSTEM, A TWO-CONDUCTOR TRANSMISSION LINE HAVING SUFFICIENT LENGTH TO EXHIBIT SUBSTANTIALLY ITS CHARACTERISTIC IMPEDANCE AT A PREDETERMINED FREQUENCY, TRANSFORMER MEANS COUPLED TO ONE END OF SAID TRANSMISSION LINE, IMPEDANCE TERMINATING MEANS COUPLED TO THE OTHER END OF SAID TRANSMISSION LINE, MEANS FOR SELECTIVELY CHANGING THE IMPEDANCE OF SAID TERMINATING MEANS BETWEEN FIRST AND SECOND IMPEDANCE VALUES, AND DETECTING MEANS COUPLED TO SAID TRANSMISSION LINE AT SAID ONE END FOR PROVIDING AN A.C. ISOLATION OF SAID TRANSMISSION LINE FROM SAID TRANSFORMER AND FOR REFLECTING A THIRD IMPEDANCE VALUE TO SAID TRANSFORMER WHEN SAID TERMINATING MEANS HAS SAID FIRST IMPEDANCE VALUE AND FOR REFLECTING A FOURTH IMPEDANCE VALUE TO SAID TRANSFORMER WHEN SAID TERMINATING MEANS HAS SAID SECOND IMPEDANCE VALUE.
Claim 2
Dependent Claim
121 words
IN A SIGNALING SYSTEM, A TWO-CONDUCTOR TRANSMISSION LINE HAVING SUFFICIENT LENGTH TO EXHIBIT SUBSTANTIALLY ITS CHARACTERISTIC IMPEDANCE AT A PREDETERMINED FREQUENCY, TRANSFORMER MEANS COUPLED TO ONE END OF SAID TRANSMISSION LINE, IMPEDANCE TERMINATING MEANS COUPLED TO THE OTHER END OF SAID TRANSMISSION LINE, MEANS FOR SELECTIVELY CHANGING THE IMPEDANCE OF SAID TERMINATING MEANS BETWEEN FIRST AND SECOND IMPEDANCE VALUES, AND DETECTING MEANS COUPLED TO SAID TRANSMISSION LINE AT SAID ONE END FOR PROVIDING AN A.C. ISOLATION OF SAID TRANSMISSION LINE FROM SAID TRANSFORMER AND FOR REFLECTING A THIRD IMPEDANCE VALUE TO SAID TRANSFORMER WHEN SAID TERMINATING MEANS HAS SAID FIRST IMPEDANCE VALUE AND FOR REFLECTING A FOURTH IMPEDANCE VALUE TO SAID TRANSFORMER WHEN SAID TERMINATING MEANS HAS SAID SECOND IMPEDANCE VALUE.
Claim 3
Dependent Claim
50 words
THE SYSTEM AS SET FORTH IN CLAIM 1 WHEREIN SAID DETECTING MEANS COMPRISES A SOURCE OF DIRECT CURRENT POTENTIAL, AND MEANS FOR RESPONDING TO THE CHANGE OF DIRECT CURRENT IN SAID TRANSMISSION LINE WHEN THE IMPEDANCE OF SAID TERMINATING MEANS IS CHANGED FROM SAID FIRST TO SAID SECOND IMPEDANCE VALUE.
References Cited (Backward Citations)
US2387269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |