US3767848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positively guided disc record pickup
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1971-06-18
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Granted: 1973-10-23
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Expires: 1991-06-18
Abstract
Abstract A mechanism for playing back television pictures recorded on picture record discs including, a pickup for the video signals which are moved radially across the disc by means of a positively guided mount in which the pickup is elastically mounted. The guide means for the mount are rigidly coupled with the turntable drive.
Inventors
- 👤 E Schuller
- 👤 H Redlich
- 👤 H Klemp
- 👤 G Dickopp
- 👤 W Rainer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:05
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083; H; H04; H04N; H04N5/00; H04N5/76; H04N5/7605; Y; Y10; Y10S; Y10S358/00; Y10S358/907
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
170 words
In a system for playing back video signals recorded in the spiral groove of a record disc and including rotation means for rotating the disc, a stylus arranged to engage in the groove and a mount supporting the stylus, the improvement comprising: resilient fastening means fastening said stylus yieldably to said mount; drive means connected for normally driving said mount radially of the disc at a rate bearing a fixed relation to the rate of disc rotation and equal to the rate of radial movement experienced by said stylus while faithfully tracking the spiral grooves of the disc; and drive speed varying means connected to said drive means for selectively changing the rate of radial movement of said mount to a value different from that required for said stylus to faithfully track the spiral groove of the disc while continuing playback and maintaining said stylus in engagement with the groove, whereupon said stylus alternately faithfully tracks a plurality of groove turns and jumps radially across a plurality of groove turns.
Claim 2
Dependent Claim
170 words
In a system for playing back video signals recorded in the spiral groove of a record disc and including rotation means for rotating the disc, a stylus arranged to engage in the groove and a mount supporting the stylus, the improvement comprising: resilient fastening means fastening said stylus yieldably to said mount; drive means connected for normally driving said mount radially of the disc at a rate bearing a fixed relation to the rate of disc rotation and equal to the rate of radial movement experienced by said stylus while faithfully tracking the spiral grooves of the disc; and drive speed varying means connected to said drive means for selectively changing the rate of radial movement of said mount to a value different from that required for said stylus to faithfully track the spiral groove of the disc while continuing playback and maintaining said stylus in engagement with the groove, whereupon said stylus alternately faithfully tracks a plurality of groove turns and jumps radially across a plurality of groove turns.
Claim 3
Dependent Claim
23 words
An arrangement as defined in claim 1 wherein said drive means include a coupling device for disconnecting said drive means from said mount.
Claim 4
Dependent Claim
22 words
An arrangement as defined in claim 1 wherein said stylus is arranged to exert aN adjustable contact pressure on the record disc.
Claim 5
Dependent Claim
23 words
An arrangement as defined in claim 1 further comprising a transducer rigidly connected to said stylus and resiliently connected to said fastening means.
Claim 6
Dependent Claim
31 words
An arrangement as defined in claim 1 wherein the signals recorded in the disc groove include synchronizing pulses, with similar synchronizing pulses being recorded in radial alignment in adjacent groove turns.
Claim 7
Dependent Claim
30 words
An arrangement as defined in claim 1 wherein said drive means and said speed varying means comprise a gear set coupling said mount to the means for rotating the disc.
Claim 8
Dependent Claim
46 words
An arrangement as defined in claim 6 wherein said gear set has a selectively variable gear ratio for permitting a video picture to be played back at faster and slower than real speed during which playback the sound accompanying the video signal may be switched off.
Claim 9
Dependent Claim
29 words
An arrangement as defined in claim 1 wherein said mount comprises a carriage and said resilient fastening means comprises a tube fastened in said carriage and supporting said stylus.
Claim 10
Dependent Claim
23 words
An arrangement as defined in claim 8 wherein said resilient fastening means further comprises a resilient connector connecting said tube to said carriage.
Claim 11
Dependent Claim
33 words
An arrangement as defined in claim 9 wherein said mount further comprises an elastic damping buffer disposed in said carriage and surrounding the end of said tube which is connected to said carriage.
Claim 12
Dependent Claim
78 words
An arrangement as defined in claim 1 wherein said drive speed varying means include a coupling device for disconnecting said drive means from said mount, whereupon said rate of radial movement of said mount has a value of zero and during rotation of the disc said stylus is carried along by the groove for several groove widths and then jumps back by several groove widths, due to the elasticity of the mounting of said stylus in said mount.
Claim 13
Dependent Claim
32 words
An arrangement as defined in claim 11 wherein said stylus is mounted in said mount to jump across a span of at least 22 groove widths when said drive means are disconnected.
Claim 14
Dependent Claim
48 words
An arrangement as defined in claim 11 wherein said stylus is mounted in said mount, and the relation between said stylus and the record groove are such that when said drive means are disconnected and the record rotates, said stylus will jump over at least 10 groove widths.
Claim 15
Dependent Claim
21 words
An arrangement as defined in claim 13 wherein said stylus will jump over a span of 25 to 100 groove widths.
Claim 16
Dependent Claim
65 words
In a system for playing back video signals recorded in the spiral groove of a record disc and including rotation means for rotating the disc, a stylus arranged to engage in the groove and a mount supporting the stylus, the improvement comprising resilient fastening means fastening said stylus yieldably to said mount, and means for selectively varying the spring constant of said resilient fastening means.
Claim 17
Dependent Claim
65 words
In a system for playing back video signals recorded in the spiral groove of a record disc and including rotation means for rotating the disc, a stylus arranged to engage in the groove and a mount supporting the stylus, the improvement comprising resilient fastening means fastening said stylus yieldably to said mount, and means for selectively varying the spring constant of said resilient fastening means.
Claim 18
Dependent Claim
39 words
An arrangement as defined in claim 15 further comprising drive means connected for positively driving said mount radially across the disc, the drive produced by said drive means being directly derived from the rotation produced by the rotation means.
Claim 19
Dependent Claim
28 words
An arrangement as defined in claim 15 wherein said mount comprises a carriage and said fastening means comprises a tube fastened in said carriage and supporting said stylus.
Claim 20
Dependent Claim
61 words
An arrangement as defined in claim 17 wherein said means for selectively varying comprise an abutment fastened to said mount and disposed parallel to said tube for varying such spring constant, said abutment being displaceable in longitudinal direction, and being disposed so that said tube will bear against said abutment after it has reached a certain deflection relative to said carriage.
Claim 21
Dependent Claim
15 words
An arrangement as defined in claim 18 wherein there are a plurality of displaceable abutments.
Claim 22
Dependent Claim
16 words
An arrangement as defined in claim 19 wherein said abutments are arranged to be displaced individually.
Claim 23
Dependent Claim
15 words
An arrangement as defined in claim 18 wherein said abutments are constituted by resilient elements.
Claim 24
Dependent Claim
28 words
An aRrangement as defined in claim 21 wherein the resistance moments of each said resilient element is different in a vertical direction from that in a horizontal direction.
Claim 25
Dependent Claim
37 words
An arrangement as defined in claim 22 wherein each said abutment in the form of a resilient element is composed of a flat material and arranged so that its larger cross-sectional area lies in a horizontal direction.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |