US3707600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc controlled interlaced scanning raster
Assignee: Eastman Kodak Co
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Filing: 1971-01-18
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Granted: 1972-12-26
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Expires: 1991-01-18
Abstract
Abstract Apparatus for scanning the frames of a continuously moving information bearing medium in a television field pattern including a plurality of spaced horizontal lines controlled by a horizontal sweep signal having a predetermined horizontal sweep frequency. A predetermined sweep frequency of the horizontal sweep signal is produced by a horizontal oscillator whose frequency is varied by a control signal produced by a phase detector. A feedback circuit interconnects the output of the horizontal oscillator and one input terminal of a phase detector. The other input terminal of the phase detector is adapted to receive a sync signal having a frequency equal to an integral submultiple of the predetermined horizontal sweep frequency. The phase detector responds to the horizontal sweep signal and the detected sync signal to produce the control signal, the magnitude of which is dependent upon the phase difference therebetween.
Inventors
- 👤 Carl N Schauffele
- 👤 Lenard M Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/36; H04N3/38
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
181 words
Apparatus for scanning continuously moving information bearing media with a repetitive line scansion produced at a predetermined sweep frequency Fh, said apparatus comprising: a. means responsive to the movement of the media for generating a first signal having a frequency Fh/N equal to an integral submultiple N of the predetermined sweep frequency Fh; and b. means for producing a sweep signal having the predetermined sweep frequency Fh comprising: 1. means for filtering the sweep signal to remove all harmonic frequencies of the predetermined sweep frequency Fh: 2. means adapted to receive the first signal and the filtered sweep signal, said means being responsive to a predetermined relationship in the phase of the first signal and the filtered sweep signal for producing a second signal having a parameter dependent upon said relationship; and 3. oscillator means responsive to the parameter of the second signal for generating the sweep signal and for controlling the sweep frequency Fh thereof, said oscillator means being restricted in operating frequency to a range of (N - 1/2 )/N X Fh to (N + 1/2 )/N X Fh.
Claim 2
Dependent Claim
181 words
Apparatus for scanning continuously moving information bearing media with a repetitive line scansion produced at a predetermined sweep frequency Fh, said apparatus comprising: a. means responsive to the movement of the media for generating a first signal having a frequency Fh/N equal to an integral submultiple N of the predetermined sweep frequency Fh; and b. means for producing a sweep signal having the predetermined sweep frequency Fh comprising: 1. means for filtering the sweep signal to remove all harmonic frequencies of the predetermined sweep frequency Fh: 2. means adapted to receive the first signal and the filtered sweep signal, said means being responsive to a predetermined relationship in the phase of the first signal and the filtered sweep signal for producing a second signal having a parameter dependent upon said relationship; and 3. oscillator means responsive to the parameter of the second signal for generating the sweep signal and for controlling the sweep frequency Fh thereof, said oscillator means being restricted in operating frequency to a range of (N - 1/2 )/N X Fh to (N + 1/2 )/N X Fh.
Claim 3
Dependent Claim
64 words
The apparatus of claim 3 wherein said first signal generating means further comprises: a. a disc adapted to rotate at a predetermined rate relative to the rate of movement of the information bearing media and having indicia disposed thereon in a track; and b. means located adjacent to said track for detecting the movement of the indicia and generating the first signal responsive thereto.
Claim 4
Dependent Claim
45 words
means adapted to receive the first signal and the filtered sweep signal, said means being responsive to a predetermined relationship in the phase of the first signal and the filtered sweep signal for producing a second signal having a parameter dependent upon said relationship; and
Claim 5
Dependent Claim
45 words
means adapted to receive the first signal and the filtered sweep signal, said means being responsive to a predetermined relationship in the phase of the first signal and the filtered sweep signal for producing a second signal having a parameter dependent upon said relationship; and
Claim 6
Dependent Claim
61 words
phase detector means having a first input terminal adapted to receive the first signal and a second input terminal adapted to receive the filtered horizontal sweep signal, said phase detector means being responsive to a phase difference between the frequencies of the first signal and the filtered horizontal sweep signal for producing a phase difference signal at an output terminal thereof;
Claim 7
Dependent Claim
61 words
phase detector means having a first input terminal adapted to receive the first signal and a second input terminal adapted to receive the filtered horizontal sweep signal, said phase detector means being responsive to a phase difference between the frequencies of the first signal and the filtered horizontal sweep signal for producing a phase difference signal at an output terminal thereof;
Claim 8
Dependent Claim
48 words
oscillator means responsive to the parameter of the second signal for generating the sweep signal and for controlling the sweep frequency Fh thereof, said oscillator means being restricted in operating frequency to a range of (N - 1/2 )/N X Fh to (N + 1/2 )/N X Fh.
Claim 9
Dependent Claim
48 words
oscillator means responsive to the parameter of the second signal for generating the sweep signal and for controlling the sweep frequency Fh thereof, said oscillator means being restricted in operating frequency to a range of (N - 1/2 )/N X Fh to (N + 1/2 )/N X Fh.
Claim 10
Dependent Claim
55 words
The apparatus of claim 1 wherein the second signal producing means is responsive to the phase difference between the frequencies of the first signal and the filtered sweep signal for producing a phase difference signal, and the second signal producing means further comprises means for integrating the phase difference signal to produce the second signal.
Claim 11
Dependent Claim
36 words
integrating means adapted to receive the phase difference signal from the output terminal of the phaSe detector means for integrating the phase difference signal to produce a second signal having a variable DC voltage amplitude; and
Claim 12
Dependent Claim
36 words
integrating means adapted to receive the phase difference signal from the output terminal of the phaSe detector means for integrating the phase difference signal to produce a second signal having a variable DC voltage amplitude; and
Claim 13
Dependent Claim
41 words
The apparatus of claim 3 wherein the second signal is a variable DC voltage signal and the sweep signal generating means comprises a voltage controlled oscillator that oscillates at a sweep frequency dependent upon an amplitude of the DC voltage signal.
Claim 14
Dependent Claim
71 words
voltage controlled horizontal oscillator means having an input terminal adapted to receive the second signal, said oscillator means being responsive to the second signal for generating the horizontal sweep signal at a horizontal sweep frequency Fh dependent upon the DC voltage amplitude of the second signal, said oscillator means being restricted in operating frequency to a range of (N - 1/2 )/N X Fh to (N + 1/2 )/N X Fh.
Claim 15
Dependent Claim
71 words
voltage controlled horizontal oscillator means having an input terminal adapted to receive the second signal, said oscillator means being responsive to the second signal for generating the horizontal sweep signal at a horizontal sweep frequency Fh dependent upon the DC voltage amplitude of the second signal, said oscillator means being restricted in operating frequency to a range of (N - 1/2 )/N X Fh to (N + 1/2 )/N X Fh.
Claim 16
Dependent Claim
117 words
Apparatus for scanning the frames of a continuously moving motion picture film in a television field pattern including a plurality of spaced horizontal line scansions produced at a predetermined horizontal sweep frequency Fh, said apparatus comprising: a. a disc adapted to rotate at a predetermined rate related to the rate of movement of the motion picture film and having indicia disposed thereon in a track; b. means located adjacent said track for detecting the movement of the indicia and generating a first signal having a frequency Fh/N equal to an integral submultiple N of the predetermined horizontal sweep frequency Fh; and c. means for producing a horizontal sweep signal having the predetermined horizontal sweep frequency Fh comprising:
Claim 17
Dependent Claim
117 words
Apparatus for scanning the frames of a continuously moving motion picture film in a television field pattern including a plurality of spaced horizontal line scansions produced at a predetermined horizontal sweep frequency Fh, said apparatus comprising: a. a disc adapted to rotate at a predetermined rate related to the rate of movement of the motion picture film and having indicia disposed thereon in a track; b. means located adjacent said track for detecting the movement of the indicia and generating a first signal having a frequency Fh/N equal to an integral submultiple N of the predetermined horizontal sweep frequency Fh; and c. means for producing a horizontal sweep signal having the predetermined horizontal sweep frequency Fh comprising:
References Cited (Backward Citations)
US3317663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |