US3136846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen grid pulsing of chroma and burst amplifier
Assignee: RCA Corp
•
Filing: 1956-09-24
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Granted: 1964-06-09
•
Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Macovski Albert
- 👤 Louis F Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:52
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/44; H04N9/455; H04N9/64; H04N9/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A COLOR TELEVISION RECEIVER ADAPTED TO RECEIVE A VIDEO SIGNAL INCLUDING DURING EACH SCAN LINE A LUMINANCE PORTION AND A CHROMINANCE PORTION, AND INCLUDING BETWEEN SUCCESSIVE SCAN LINES A SYNCHRONIZING PULSE AND A BURST OF OSCILLATIONS AT A COLOR SUBCARRIER FREQUENCY, COMPRISING, A CHROMA AMPLIFIER INCLUDING A VACUUM TUBE HAVING A CONTROL GRID AND A SCREEN GRID, MEANS TO APPLY SAID CHROMINANCE PORTION AND SAID BURSTS TO SAID CONTROL GRID, MEANS RESPONSIVE TO SAID SYNCHRONIZING PULSES TO GENERATE POSITIVE POLARITY PULSES COINCIDING IN TIME WITH SAID BURSTS, AND MEANS TO APPLY SAID PULSES TO SAID SCREEN GRID TO APPRECIABLY INCREASE THE GAIN AND MAXIMUM OUTPUT OF SAID CHROMA AMPLIFIER ONLY WHEN SAID BURSTS ARE APPLIED TO SAID CONTROL GRID.
Claim 2
Dependent Claim
120 words
IN A COLOR TELEVISION RECEIVER ADAPTED TO RECEIVE A VIDEO SIGNAL INCLUDING DURING EACH SCAN LINE A LUMINANCE PORTION AND A CHROMINANCE PORTION, AND INCLUDING BETWEEN SUCCESSIVE SCAN LINES A SYNCHRONIZING PULSE AND A BURST OF OSCILLATIONS AT A COLOR SUBCARRIER FREQUENCY, COMPRISING, A CHROMA AMPLIFIER INCLUDING A VACUUM TUBE HAVING A CONTROL GRID AND A SCREEN GRID, MEANS TO APPLY SAID CHROMINANCE PORTION AND SAID BURSTS TO SAID CONTROL GRID, MEANS RESPONSIVE TO SAID SYNCHRONIZING PULSES TO GENERATE POSITIVE POLARITY PULSES COINCIDING IN TIME WITH SAID BURSTS, AND MEANS TO APPLY SAID PULSES TO SAID SCREEN GRID TO APPRECIABLY INCREASE THE GAIN AND MAXIMUM OUTPUT OF SAID CHROMA AMPLIFIER ONLY WHEN SAID BURSTS ARE APPLIED TO SAID CONTROL GRID.
References Cited (Backward Citations)
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US2712568A
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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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |