Patent US3179743A successfully refreshed from Google Patents.
US3179743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television brightness and contrast control circuit
Assignee: RCA Corp
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Filing: 1962-05-15
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Granted: 1965-04-20
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Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 Richard W Ahrons
- 👤 Jr Leslie L Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:24
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A CATHODE RAY TUBE SYSTEM INCLUDING A CATHODE RAY TUBE DEVICE HAVING A BEAM INTENSITY CONTROLLING MEANS AND AN ULTOR ELECTRODE, A HIGH VOLTAGE SUPPLY COUPLED TO SAID ULTOR ELECTRODE AND MEANS FOR APPLYING A VIDEO SIGNAL TO SAID BEAM INTENSITY CONTROLLING MEANS, AND AUTOMATIC CONTROL SYSTEM COMPRISING MEANS COUPLED TO SAID VIDEO SIGNAL APPLYING MEANS FOR DETECTING PICTURE INFORMATION PEAKS IN ONE DIRECTION OF SAID VIDEO SIGNAL TO PRODUCE A CONTROL SIGNAL, AND MEANS COUPLED TO SAID VIDEO SIGNAL APPLYING MEANS AND RESPONSIVE TO SAID CONTROL SIGNAL FOR CONTROLLING THE AMPLITUDE OF SAID VIDEO SIGNAL APPLIED TO SAID BEAM INTENSITY CONTROLLING ELECTRODE AS A FUNCTION OF THE AMPLITUDE OF SAID PICTURE INFORMATION PEAKS IN SAID VIDEO SIGNAL WHEREBY TO PREVERNT SAID CATHODE RAY TUBE FROM SPOT BLOOMING.
Claim 2
Dependent Claim
129 words
IN A CATHODE RAY TUBE SYSTEM INCLUDING A CATHODE RAY TUBE DEVICE HAVING A BEAM INTENSITY CONTROLLING MEANS AND AN ULTOR ELECTRODE, A HIGH VOLTAGE SUPPLY COUPLED TO SAID ULTOR ELECTRODE AND MEANS FOR APPLYING A VIDEO SIGNAL TO SAID BEAM INTENSITY CONTROLLING MEANS, AND AUTOMATIC CONTROL SYSTEM COMPRISING MEANS COUPLED TO SAID VIDEO SIGNAL APPLYING MEANS FOR DETECTING PICTURE INFORMATION PEAKS IN ONE DIRECTION OF SAID VIDEO SIGNAL TO PRODUCE A CONTROL SIGNAL, AND MEANS COUPLED TO SAID VIDEO SIGNAL APPLYING MEANS AND RESPONSIVE TO SAID CONTROL SIGNAL FOR CONTROLLING THE AMPLITUDE OF SAID VIDEO SIGNAL APPLIED TO SAID BEAM INTENSITY CONTROLLING ELECTRODE AS A FUNCTION OF THE AMPLITUDE OF SAID PICTURE INFORMATION PEAKS IN SAID VIDEO SIGNAL WHEREBY TO PREVERNT SAID CATHODE RAY TUBE FROM SPOT BLOOMING.
References Cited (Backward Citations)
US2414228A
Cited
US2892028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |