US3272919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television fader amplifier
Assignee: Nortel Networks Ltd
•
Filing: 1963-11-15
•
Granted: 1966-09-13
•
Expires: 1983-11-15
Abstract
No abstract record available.
Inventors
- 👤 Gordon B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:57
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A TELEVISION FADER AMPLIFIER COMPRISING INPUT MEANS FOR AN AT LEAST SEMI-COMPOSITE VIDEO SIGNAL, MEANS FOR SUBTRACTING SET-UP FROM SAID SIGNAL, MEANS FOR AMPLIFYING THE REMAINDER SIGNAL AFTER SAID SUBTRACTION, MEANS FOR CLAMPING THE AMPLIFIED REMAINDER SIGNAL TO A REFERENCE VOLTAGE DURING BLANKING INTERVALS TO PRODUCE A CLAMPED NON-COMPOSITE SIGNAL OF SELECTED AMPLITUDE, AND MEANS FOR COMBINING SAID NON-COMPOSITE SIGNAL WITH SET-UP AND SYNC PULSES OF KNOWN AMPLITUDE TO GENERATE A COMPOSITE OUTPUT SIGNAL.
Claim 2
Dependent Claim
74 words
A TELEVISION FADER AMPLIFIER COMPRISING INPUT MEANS FOR AN AT LEAST SEMI-COMPOSITE VIDEO SIGNAL, MEANS FOR SUBTRACTING SET-UP FROM SAID SIGNAL, MEANS FOR AMPLIFYING THE REMAINDER SIGNAL AFTER SAID SUBTRACTION, MEANS FOR CLAMPING THE AMPLIFIED REMAINDER SIGNAL TO A REFERENCE VOLTAGE DURING BLANKING INTERVALS TO PRODUCE A CLAMPED NON-COMPOSITE SIGNAL OF SELECTED AMPLITUDE, AND MEANS FOR COMBINING SAID NON-COMPOSITE SIGNAL WITH SET-UP AND SYNC PULSES OF KNOWN AMPLITUDE TO GENERATE A COMPOSITE OUTPUT SIGNAL.
References Cited (Backward Citations)
US2412279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |