Patent US3270130A successfully refreshed from Google Patents.
US3270130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo system with plural reference signals
Assignee: RCA Corp
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Filing: 1962-03-27
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Granted: 1966-08-30
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Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Robert N Hurst
- 👤 Robert A Dischert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:09
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/52; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/912; Y10S388/915; Y10S388/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A SYSTEM FOR COMPARING A CONTROL SIGNAL WITH FIRST AND SECOND REFERENCE SIGNALS, SAID REFERENCE SIGNALS HAVING FREQUENCIES LOWER THAN THE FREQUENCY OF SAID CONTROL SIGNAL COMPRISING, (A) MEANS FOR DIVIDING THE FREQUENCY OF SAID CONTROL SIGNAL TO FORM A SECOND CONTROL SIGNAL HAVING A FREQUENCY APPROXIMATELY EQUAL TO THE FREQUENCIES OF SAID REFERENCE SIGNALS, (B) MEANS FOR COMPARING THE PHASE OF SAID FIRST REFERENCE SIGNAL WITH THE PHASE OF SAID SECOND CONTROL SIGNAL AND FOR GENERATING AN ERROR SIGNAL RELATED TO THE PHASE DIFFERENCE, AND (C) MEANS RESPONSIVE TO SAID SECOND REFERENCE SIGNAL FOR CONTROLLING SAID FIRST MENTIONED MEANS SUCH THAT THE PHASE OF SAID SECOND CONTROL SIGNAL IS APPROXIMATELY THE SAME AS THE PHASE OF SAID SECOND REFERENCE SIGNAL.
Claim 2
Independent Claim
121 words
A SYSTEM FOR COMPARING A CONTROL SIGNAL WITH FIRST AND SECOND REFERENCE SIGNALS, SAID REFERENCE SIGNALS HAVING FREQUENCIES LOWER THAN THE FREQUENCY OF SAID CONTROL SIGNAL COMPRISING, (A) MEANS FOR DIVIDING THE FREQUENCY OF SAID CONTROL SIGNAL TO FORM A SECOND CONTROL SIGNAL HAVING A FREQUENCY APPROXIMATELY EQUAL TO THE FREQUENCIES OF SAID REFERENCE SIGNALS, (B) MEANS FOR COMPARING THE PHASE OF SAID FIRST REFERENCE SIGNAL WITH THE PHASE OF SAID SECOND CONTROL SIGNAL AND FOR GENERATING AN ERROR SIGNAL RELATED TO THE PHASE DIFFERENCE, AND (C) MEANS RESPONSIVE TO SAID SECOND REFERENCE SIGNAL FOR CONTROLLING SAID FIRST MENTIONED MEANS SUCH THAT THE PHASE OF SAID SECOND CONTROL SIGNAL IS APPROXIMATELY THE SAME AS THE PHASE OF SAID SECOND REFERENCE SIGNAL.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |