US3137816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter automatic frequency control network including modulation cancelling means
Assignee: Collins Radio Co
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Filing: 1962-08-06
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Granted: 1964-06-16
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Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Frank D Mclin
- 👤 Glenn W Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:32
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
AN AUTOMATIC FREQUENCY CONTROL NETWORK FOR STABILIZING THE CARRIER FREQUENCY OF AN OSCILLATOR HAVING VOLTAGE SENSITIVE FREQUENCY DETERMINING MEANS ESTABLISHING SAID CARRIER FREQUENCY AND BEING FREQUENCY MODULATED BY RECEIVED MODULATING SIGNALS, SAID NETWORK COMPRISING: MEANS FOR RECEIVING THE FREQUENCY MODULATED OUTPUT SIGNAL FROM SAID OSCILLATOR AND DEVELOPING AN ERROR SIGNAL, PART OF WHICH IS DUE TO SAID FREQUENCY MODULATION, WHENEVER THE CARRIER FREQUENCY DEVIATES FROM A PREDETERMINED OPERATIONAL FREQUENCY TO BE MAINTAINED; CANCELLING MEANS FOR RECEIVING SAID MODULATING SIGNALS COUPLED TO SAID OSCILLATOR AND SAID ERROR SIGNAL AND SUBSTANTIALLY ELIMINATING THAT PART OF SAID ERROR SIGNAL DUE TO SAID FREQUENCY MODULATION; AND MEANS FOR RECEIVING SAID ERROR SIGNAL FROM SAID CANCELLING MEANS AND DEVELOPING THEREFROM A D.-C. VOLTAGE THAT IS COUPLED TO SAID VOLTAGE SENSITIVE FREQUENCY DETERMINING MEANS TO ELIMINATE SAID CARRIER FREQUENCY DEVIATION FROM SAID PREDETERMINED OPERATIONAL FREQUENCY.
Claim 2
Dependent Claim
139 words
AN AUTOMATIC FREQUENCY CONTROL NETWORK FOR STABILIZING THE CARRIER FREQUENCY OF AN OSCILLATOR HAVING VOLTAGE SENSITIVE FREQUENCY DETERMINING MEANS ESTABLISHING SAID CARRIER FREQUENCY AND BEING FREQUENCY MODULATED BY RECEIVED MODULATING SIGNALS, SAID NETWORK COMPRISING: MEANS FOR RECEIVING THE FREQUENCY MODULATED OUTPUT SIGNAL FROM SAID OSCILLATOR AND DEVELOPING AN ERROR SIGNAL, PART OF WHICH IS DUE TO SAID FREQUENCY MODULATION, WHENEVER THE CARRIER FREQUENCY DEVIATES FROM A PREDETERMINED OPERATIONAL FREQUENCY TO BE MAINTAINED; CANCELLING MEANS FOR RECEIVING SAID MODULATING SIGNALS COUPLED TO SAID OSCILLATOR AND SAID ERROR SIGNAL AND SUBSTANTIALLY ELIMINATING THAT PART OF SAID ERROR SIGNAL DUE TO SAID FREQUENCY MODULATION; AND MEANS FOR RECEIVING SAID ERROR SIGNAL FROM SAID CANCELLING MEANS AND DEVELOPING THEREFROM A D.-C. VOLTAGE THAT IS COUPLED TO SAID VOLTAGE SENSITIVE FREQUENCY DETERMINING MEANS TO ELIMINATE SAID CARRIER FREQUENCY DEVIATION FROM SAID PREDETERMINED OPERATIONAL FREQUENCY.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |