US3205452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unidirectionally conductive device for varying the output signal frequency of a signal generator
Assignee: Zenith Electronics LLC
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Filing: 1962-01-03
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Granted: 1965-09-07
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Expires: 1982-01-03
Abstract
No abstract record available.
Inventors
- 👤 Saudinaitis Emmanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/12; H04N5/126; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/62; H03K4/64; H03K4/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN AUTOMATIC FREQUENCY CONTROL CIRCUIT COMPRISING: A SOURCE OF REFERENCE SIGNAL; A GENERATOR FOR PRODUCING A LOCAL SINUSOIDAL SIGNAL THE PHASE OF WHICH MAY BE VARIED; MEANS FOR COMPARING THE PHASE OF SAID REFERENCE SIGNAL AND SAID LOCAL SIGNAL TO PRODUCE AN ERROR SIGNAL INDICATIVE OF THEIR PHASE RELATION; A VARIABLE RESISTANCE DEVICE; MEANS FOR APPLYING SAID ERROR SIGNAL TO SAID DEVICE FOR VARYING THE RESISTANCE THEREOF; UNIDIRECTIONAL SIGNAL CONDUCTING MEANS FOR COUPLING SAID RESISTANCE DEVICE TO SAID GENERATOR TO VARY THE OPERATING FREQUENCY THEREOF IN ACCORDANCE WITH THE EFECTIVE RESISTANCE OF SAID DEVICE; AND MEANS COUPLED TO SAID DEVICE AND TO SAID GENERATOR AND INCLUDING SAID UNIDIRECTIONAL SIGNAL CONDUCTING
Claim 2
Dependent Claim
110 words
AN AUTOMATIC FREQUENCY CONTROL CIRCUIT COMPRISING: A SOURCE OF REFERENCE SIGNAL; A GENERATOR FOR PRODUCING A LOCAL SINUSOIDAL SIGNAL THE PHASE OF WHICH MAY BE VARIED; MEANS FOR COMPARING THE PHASE OF SAID REFERENCE SIGNAL AND SAID LOCAL SIGNAL TO PRODUCE AN ERROR SIGNAL INDICATIVE OF THEIR PHASE RELATION; A VARIABLE RESISTANCE DEVICE; MEANS FOR APPLYING SAID ERROR SIGNAL TO SAID DEVICE FOR VARYING THE RESISTANCE THEREOF; UNIDIRECTIONAL SIGNAL CONDUCTING MEANS FOR COUPLING SAID RESISTANCE DEVICE TO SAID GENERATOR TO VARY THE OPERATING FREQUENCY THEREOF IN ACCORDANCE WITH THE EFECTIVE RESISTANCE OF SAID DEVICE; AND MEANS COUPLED TO SAID DEVICE AND TO SAID GENERATOR AND INCLUDING SAID UNIDIRECTIONAL SIGNAL CONDUCTING
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |