US3870320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pickup arm control for video disc player
Assignee: RCA Corp
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Filing: 1974-03-25
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Granted: 1975-03-11
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Expires: 1994-03-25
Abstract
Abstract A transducer signal pickup assembly is positioned over a desired portion of video encoded disc medium by apparatus arranged to selectively engage different portions of a first rotating belt to effect movement of the pickup assembly toward or away from the center of the disc. Further positioning of the transducer assembly in a tracking mode for facilitating playback of the signal encoded disc is provided by engaging a second rotating belt.
Inventors
- 👤 Leslie Albert Torrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:35
CPC Classifications
G; G11; G11B; G11B21/00; G11B19/00; G11B19/02; G11B19/08; G11B19/14; G11B3/00; G11B3/02; G11B3/08; G11B3/085; G11B3/08503; G11B3/08519; G11B3/08522; G11B3/08535; G11B3/08564; G11B3/08587; G11B3/0859; G11B3/095; G11B3/0952; G11B9/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
Apparatus for controlling a movable transducer assembly with respect to a disc type record medium, comprising: a first drive belt; Means for driving said first belt at a first given velocity; a second drive belt; means for driving said second belt at a velocity different from said first given velocity; a first means arranged to selectively couple said transducer assembly to different portions of said first drive belt for providing motion to said assembly toward and away from the center of said disc; and a second means arranged to selectively couple said transducer assembly to portions of said second drive belt for providing motion to said transducer assembly toward the center of said disc.
Claim 2
Dependent Claim
114 words
Apparatus for controlling a movable transducer assembly with respect to a disc type record medium, comprising: a first drive belt; Means for driving said first belt at a first given velocity; a second drive belt; means for driving said second belt at a velocity different from said first given velocity; a first means arranged to selectively couple said transducer assembly to different portions of said first drive belt for providing motion to said assembly toward and away from the center of said disc; and a second means arranged to selectively couple said transducer assembly to portions of said second drive belt for providing motion to said transducer assembly toward the center of said disc.
Claim 3
Dependent Claim
114 words
Apparatus for controlling a movable transducer assembly with respect to a disc type record medium, comprising: a first drive belt; Means for driving said first belt at a first given velocity; a second drive belt; means for driving said second belt at a velocity different from said first given velocity; a first means arranged to selectively couple said transducer assembly to different portions of said first drive belt for providing motion to said assembly toward and away from the center of said disc; and a second means arranged to selectively couple said transducer assembly to portions of said second drive belt for providing motion to said transducer assembly toward the center of said disc.
Claim 4
Dependent Claim
114 words
Apparatus for controlling a movable transducer assembly with respect to a disc type record medium, comprising: a first drive belt; Means for driving said first belt at a first given velocity; a second drive belt; means for driving said second belt at a velocity different from said first given velocity; a first means arranged to selectively couple said transducer assembly to different portions of said first drive belt for providing motion to said assembly toward and away from the center of said disc; and a second means arranged to selectively couple said transducer assembly to portions of said second drive belt for providing motion to said transducer assembly toward the center of said disc.
Claim 5
Dependent Claim
34 words
The invention according to claim 1 wherein said second belt is arranged for moving said transducer assembly toward said record center at a velocity substantially less than the given velocity of said first belt.
Claim 6
Dependent Claim
15 words
The invention according to claim 1 wherein said first and second belts are continuously driven.
Claim 7
Independent Claim
117 words
A system for playing back a disc type record in which a transducer assembly is secured to a movable support for traversing said record, comprising: a pair of separate endless drive belts; means for continuously moving said pair of drive belts at different given velocities; first normally disabled motion coupling means for coupling movement of a given one of said drive belts to said movable support to advance said transducer assembly selectably toward or away from the center of said record; second normally disabled motion coupling means for advancing said transducer assembly in response to movement of the other of said drive belts; and means for enabling a selected one of said first and second coupling means.
Claim 8
Independent Claim
117 words
A system for playing back a disc type record in which a transducer assembly is secured to a movable support for traversing said record, comprising: a pair of separate endless drive belts; means for continuously moving said pair of drive belts at different given velocities; first normally disabled motion coupling means for coupling movement of a given one of said drive belts to said movable support to advance said transducer assembly selectably toward or away from the center of said record; second normally disabled motion coupling means for advancing said transducer assembly in response to movement of the other of said drive belts; and means for enabling a selected one of said first and second coupling means.
Claim 9
Dependent Claim
75 words
The invention according to claim 4 wherein said playback system also includes a rotatably driven turntable for supporting a disc record, and wherein said belt moving means comprises first means responsive to rotation of said turntable for continuously moving said given one of said drive belts at a first velocity, and further means responsive to rotation of said turntable for continuously moving the other of said belts at a velocity less than said first velocity.
Claim 10
Dependent Claim
44 words
The invention according to claim 4 wherein each of said first and second motion coupling means includes means for grasping a drive belt portion when the respective motion coupling means is enabled, and means for coupling said belt grasping means to said movable support.
Claim 11
Dependent Claim
116 words
The invention according to claim 6 wherein said first motion coupling means includes first means for grasping said given drive belt, disposed in a first region of the path of travel of said given drive belt, and serving, when actuated, to advance said transducer assembly toward the center of said record; and second means for grasping said given drive belt, disposed in a second region of said path of travel, and serving, when actuated, to advance said transducer assembly away from the center of the record; and wherein said means for enabling said first motion coupling means comprises means for actuating a selectable one of said first and second means for grasping said given drive belt.
Claim 12
Dependent Claim
32 words
The apparatus of claim 7 in combination with a limiting means coupled to said first motion coupling means for limiting the travel of said transducer assembly toward the center of said record.
Claim 13
Dependent Claim
71 words
The invention according to claim 7, wherein each of said drive belts has a given width dimension of the major surfaces thereof, and each of said belt grasping means includes first and second members for engaging opposite major surfaces of a respective one of said belts, each of said first and second members including a belt engaging surface having a dimension which exceeds the width dimension of said belt major surface.
Claim 14
Dependent Claim
33 words
The invention according to claim 8, including means disposed on the belt engaging surface of said first and second members for providing when engaged a frictional interface between said belt and said surfaces.
Claim 15
Dependent Claim
49 words
The invention according to claim 4 including controllable latching means cooperating with sAid movable transducer assembly in a given position thereof and operative in a first condition to inhibit movement of said assembly, and means responsive to the operation of said motion coupling means to control said latching means.
Claim 16
Dependent Claim
42 words
The apparatus according to claim 4 wherein said transducer assembly includes a stylus, and wherein means are coupled to said second motion coupling means for lifting said stylus away from said record in response to disabling of said second motion coupling means.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |