US3872244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television systems
Assignee: Ferranti International PLC
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Filing: 1973-06-26
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Granted: 1975-03-18
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Expires: 1993-06-26
Abstract
Abstract A television system includes means for generating a wave-motion pattern for combination with other components of a display. The pattern is gated with the other components of the display, and means are provided for controlling the shape, position and movement of the pattern relative to the rest of the display.
Inventors
- 👤 Ian Norman Vaughan-Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:40
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/06; G09B9/063; H; H04; H04N; H04N5/00; H04N5/222; H04N5/262
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A television system which includes means for electronically generating a wave-motion pattern including a variable-frequency oscillator operable at a frequency approximately equal to or the same as the television system line frequency, the variablefrequency oscillator including a high-speed bidirectional counter driven by a clock pulse generator and having its output compared with that of a variable-speed counter to generate a square-wave output from which the wave-motion pattern is derived, means for gating the signals representing the pattern with video and other signals to ensure correct overlay of the various components of a displayed picture represented by the various signals, and means for controlling the shape and position of the wave-motion pattern relative to the other components of the picture.
Claim 2
Dependent Claim
119 words
A television system which includes means for electronically generating a wave-motion pattern including a variable-frequency oscillator operable at a frequency approximately equal to or the same as the television system line frequency, the variablefrequency oscillator including a high-speed bidirectional counter driven by a clock pulse generator and having its output compared with that of a variable-speed counter to generate a square-wave output from which the wave-motion pattern is derived, means for gating the signals representing the pattern with video and other signals to ensure correct overlay of the various components of a displayed picture represented by the various signals, and means for controlling the shape and position of the wave-motion pattern relative to the other components of the picture.
Claim 3
Dependent Claim
49 words
A system as claimed in claim 1 in which the variable-speed counter is driven by the output of an equivalence circuit to which are applied the outputs of a low-speed counter and a controllable shift register the contents of which control the speed of movement of the wave-motion pattern.
Claim 4
Dependent Claim
31 words
A system as claimed in claim 2 in which the shift register controls the direction of count of the bi-directional counter and hence the direction of movement of the wave-motion pattern.
Claim 5
Dependent Claim
46 words
A system as claimed in claim 1 in which the generating means includes circuit means operable to derive from the output of the variable-frequency oscillator two paraphase sine wave outputs at a frequency approximately equal to or the same as half the television system line frequency.
Claim 6
Dependent Claim
38 words
A system as claimed in claim 4 in which the gating means includes means synchronised with the television system line frequency to pass to the display alternate ones of the said sine wave outputs on alternate scan lines.
Claim 7
Dependent Claim
26 words
A system as claimed in claim 4 in which the shape of the wave-motion pattern is controlled by varying the amplitude of the two sine-wave outputs.
References Cited (Backward Citations)
US3746778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |