US3144514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recurring signalling condition detector
Assignee: INTERNATINONAL TELEPHONE AND T
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Filing: 1961-02-27
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Granted: 1964-08-11
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Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Roy E Gitter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:14
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H03; H03D; H03D1/00; H03D1/08; H03D1/10; H04J3/0602; H04J3/0617; H04J3/12; H04L; H04L7/00; H04L7/04; H04L7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A SYSTEM TO DETECT A RECURRING SIGNALLING CONDITION WITHIN A GIVEN SIGNAL COMPRISING A BLOCKING OSCILLATOR, A DELAY LINE COUPLED TO SAID BLOCKING OSCILLATOR TO CONTROL THE OUTPUT SIGNAL OF SAID BLOCKING OSCILLATOR TO PROVIDE A REFERENCE SIGNAL HAVING A NORMAL REPETITION FREQUENCY, A CONDENSER CAPABLE OF BEING SELECTIVELY COUPLED TO SAID DELAY LINE TO PROVIDE SAID REFERENCE SIGNAL WITH A SECOND REPETITION FREQUENCY WHEN COUPLED TO SAID DELAY LINE, A COINCIDENCE DEVICE RESPONSIVE TO SAID GIVEN SIGNAL AND SAID REFERENCE SIGNAL TO PROVIDE A CONTROL SIGNAL VARYING IN ACCORDANCE WITH THE PRESENCE AND THE ABSENCE OF SAID RECURRING SIGNALLING CONDITION, AND MEANS COUPLED TO SAID CONDENSER RESPONSIVE TO SAID CONTROL SIGNAL TO ALTERNATELY CONNECT AND DISCONNECT SAID CONDENSER TO SAID DELAY LINE TO CHANGE THE REPETITION FREQUENCY OF SAID REFERENCE SIGNAL BETWEEN SAID NORMAL AND SECOND REPETITION FREQUENCIES UNTIL SAID RECURRING SIGNALLING CONDITION IS DETECTED AND TO MAINTAIN SAID CONDENSER DISCONNECTED FROM SAID DELAY LINE AFTER DETECTING SAID RECURRING SIGNALLING CONDITION.
Claim 2
Independent Claim
162 words
A SYSTEM TO DETECT A RECURRING SIGNALLING CONDITION WITHIN A GIVEN SIGNAL COMPRISING A BLOCKING OSCILLATOR, A DELAY LINE COUPLED TO SAID BLOCKING OSCILLATOR TO CONTROL THE OUTPUT SIGNAL OF SAID BLOCKING OSCILLATOR TO PROVIDE A REFERENCE SIGNAL HAVING A NORMAL REPETITION FREQUENCY, A CONDENSER CAPABLE OF BEING SELECTIVELY COUPLED TO SAID DELAY LINE TO PROVIDE SAID REFERENCE SIGNAL WITH A SECOND REPETITION FREQUENCY WHEN COUPLED TO SAID DELAY LINE, A COINCIDENCE DEVICE RESPONSIVE TO SAID GIVEN SIGNAL AND SAID REFERENCE SIGNAL TO PROVIDE A CONTROL SIGNAL VARYING IN ACCORDANCE WITH THE PRESENCE AND THE ABSENCE OF SAID RECURRING SIGNALLING CONDITION, AND MEANS COUPLED TO SAID CONDENSER RESPONSIVE TO SAID CONTROL SIGNAL TO ALTERNATELY CONNECT AND DISCONNECT SAID CONDENSER TO SAID DELAY LINE TO CHANGE THE REPETITION FREQUENCY OF SAID REFERENCE SIGNAL BETWEEN SAID NORMAL AND SECOND REPETITION FREQUENCIES UNTIL SAID RECURRING SIGNALLING CONDITION IS DETECTED AND TO MAINTAIN SAID CONDENSER DISCONNECTED FROM SAID DELAY LINE AFTER DETECTING SAID RECURRING SIGNALLING CONDITION.
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |