US3130346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uniform brightness control
Assignee: Teledyne UK Ltd
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Filing: 1961-02-21
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Granted: 1964-04-21
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Expires: 1981-02-21
Abstract
No abstract record available.
Inventors
- 👤 Callick Eric Brian Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:08
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A CATHODE RAY TUBE DISPLAY ARRANGEMENT COMPRISING MEANS FOR GENERATING AN ELECTRON BEAM, SCANNING MEANS FOR SCANNING SAID BEAM ACROSS SAID TUBE, AND MEANS FOR ALTERNATELY SWITCHING THE SCANNING ELECTRON BEAM BETWEEN TWO PREDETERMINED LIMITS OF INTENSITY AT A CYCLIC FREQUENCY WHICH IS CO-RELATED TO THE SCANNING SPEED IN SUCH MANNER THAT SAID BEAM HAS ONE LIMITING INTENSITY DURING PART OF EACH PERIOD DURING WHICH IT MOVES THROUGH ITS OWN WIDTH AND THE OTHER LIMITING INTENSITY DURING THE REMAINING PART OF SAID PERIOD, SAID SWITCHING MEANS INCLUDING SIGNAL MEANS, CONTROLLED BY THE SIGNAL TO BE DISPLAYED, FOR CONTROLLING THE LENGTH OF AT LEAST ONE OF THE TWO PARTS WHICH MAKE UP SAID PERIOD.
Claim 2
Dependent Claim
113 words
A CATHODE RAY TUBE DISPLAY ARRANGEMENT COMPRISING MEANS FOR GENERATING AN ELECTRON BEAM, SCANNING MEANS FOR SCANNING SAID BEAM ACROSS SAID TUBE, AND MEANS FOR ALTERNATELY SWITCHING THE SCANNING ELECTRON BEAM BETWEEN TWO PREDETERMINED LIMITS OF INTENSITY AT A CYCLIC FREQUENCY WHICH IS CO-RELATED TO THE SCANNING SPEED IN SUCH MANNER THAT SAID BEAM HAS ONE LIMITING INTENSITY DURING PART OF EACH PERIOD DURING WHICH IT MOVES THROUGH ITS OWN WIDTH AND THE OTHER LIMITING INTENSITY DURING THE REMAINING PART OF SAID PERIOD, SAID SWITCHING MEANS INCLUDING SIGNAL MEANS, CONTROLLED BY THE SIGNAL TO BE DISPLAYED, FOR CONTROLLING THE LENGTH OF AT LEAST ONE OF THE TWO PARTS WHICH MAKE UP SAID PERIOD.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |