US3305632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver if frequency stabilizing system
Assignee: INTERNATIONAL TELEMETER CORP
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Filing: 1963-11-14
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Granted: 1967-02-21
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Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 Patrick R J Court
- 👤 Patrick A C Segrave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:05
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/4446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
IN A TELEVISION RECEIVER OF THE TYPE WHEREIN A TUNER PROVIDES AN OUTPUT HAVING A FIRST VIDEO INTERMEDIATE FREQUENCY CARRIER AND A FIRST AUDIO INTERMEDIATE FREQUENCY CARRIER AND WHEREIN SAID INTERMEDIATE FREQUENCY CARRIERS HAVE FREQUENCY ERRORS, APPARATUS FOR ELIMINATING SAID FREQUENCY ERRORS FROM SAID INTERMEDIATE FREQUENCY CARRIERS COMPRISING A FIRST MIXER CIRCUIT, A SECOND MIXER CIRCUIT, MEANS FOR APPLYING ONLY SAID FIRST AUDIO INTERMEDIATE FREQUENCY CARRIER TO SAID FIRST MIXER CIRCUIT, A SOURCE OF STABLE FREQUENCY OSCILLATIONS, MEANS FOR APPLYING SIGNALS FROM SAID SOURCE OF STABLE FREQUENCY OSCILLATIONS TO SAID FIRST MIXER CIRCUIT, MEANS FOR DERIVING A SECOND INTERMEDIATE FREQUENCY CARRIER FROM SAID FIRST MIXER CIRCUIT, MEANS FOR APPLYING SAID FIRST INTERMEDIATE FREQUENCY VIDEO CARRIER AND SAID FIRST INTERMEDIATE FREQUENCY AUDIO CARRIER TO SAID SECOND MIXER CIRCUIT, MEANS FOR APPLYING SAID SECOND INTERMEDIATE FREQUENCY CARRIER TO SAID SECOND MIXER CIRCUIT, AND MEANS FOR DERIVING AN OUTPUT FROM SAID SECOND MIXER CIRCUIT COMPRISING A THIRD AUDIO INTERMEDIATE FREQUENCY CARRIER AT THE FREQUENCY OF SAID STABLE FREQUENCY OSCILLATIONS AND A STABLE VIDEO FREQUENCY CARRIER HAVING A STABLE FREQUENCY RELATED TO THAT OF SAID STABLE FREQUENCY OSCILLATIONS.
Claim 2
Dependent Claim
184 words
IN A TELEVISION RECEIVER OF THE TYPE WHEREIN A TUNER PROVIDES AN OUTPUT HAVING A FIRST VIDEO INTERMEDIATE FREQUENCY CARRIER AND A FIRST AUDIO INTERMEDIATE FREQUENCY CARRIER AND WHEREIN SAID INTERMEDIATE FREQUENCY CARRIERS HAVE FREQUENCY ERRORS, APPARATUS FOR ELIMINATING SAID FREQUENCY ERRORS FROM SAID INTERMEDIATE FREQUENCY CARRIERS COMPRISING A FIRST MIXER CIRCUIT, A SECOND MIXER CIRCUIT, MEANS FOR APPLYING ONLY SAID FIRST AUDIO INTERMEDIATE FREQUENCY CARRIER TO SAID FIRST MIXER CIRCUIT, A SOURCE OF STABLE FREQUENCY OSCILLATIONS, MEANS FOR APPLYING SIGNALS FROM SAID SOURCE OF STABLE FREQUENCY OSCILLATIONS TO SAID FIRST MIXER CIRCUIT, MEANS FOR DERIVING A SECOND INTERMEDIATE FREQUENCY CARRIER FROM SAID FIRST MIXER CIRCUIT, MEANS FOR APPLYING SAID FIRST INTERMEDIATE FREQUENCY VIDEO CARRIER AND SAID FIRST INTERMEDIATE FREQUENCY AUDIO CARRIER TO SAID SECOND MIXER CIRCUIT, MEANS FOR APPLYING SAID SECOND INTERMEDIATE FREQUENCY CARRIER TO SAID SECOND MIXER CIRCUIT, AND MEANS FOR DERIVING AN OUTPUT FROM SAID SECOND MIXER CIRCUIT COMPRISING A THIRD AUDIO INTERMEDIATE FREQUENCY CARRIER AT THE FREQUENCY OF SAID STABLE FREQUENCY OSCILLATIONS AND A STABLE VIDEO FREQUENCY CARRIER HAVING A STABLE FREQUENCY RELATED TO THAT OF SAID STABLE FREQUENCY OSCILLATIONS.
References Cited (Backward Citations)
US2426187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |