Patent US3679838A successfully refreshed from Google Patents.
US3679838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video tape scanner with adjustably mounted transducers providing chordal adjustment
Assignee: ARVIN/ECHO Inc
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Filing: 1970-02-19
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Granted: 1972-07-25
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Expires: 1990-02-19
Abstract
Abstract A video tape scanner having a plurality of record-reproduce heads slideably mounted on a rotatable disk. Each head is mounted on a shoe wedged between a pair of positioning blocks which are flexibly connected to respective anchoring blocks attached rigidly to the disk. A split sleeve, recessed in an opening within the rotatable disk forms the flexible connection between each positioning block and its associated anchoring block. The sleeve has a slightly tapered internal thread into which a similarly tapered screw is turned so as to flex the sleeve. By advancing or retarding the screws in both sleeves the flexure of the sleeves is changed, thereby moving the positioning blocks on both sides of the head so as to shift the position of the head which is between them.
Inventors
- 👤 Guido Salcedo
- 👤 Jimmy J Graves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
110 words
In a video tape scanner the combination comprising: a. a plate mounted for rotation about an axis and having a flat surface normal to said axis; b. a transducer assembly slideably mounted on said surface at the periphery of said plate; c. flexible positioning means adjacent said transducer assembly and having 1. a first member rigidly anchored to said plate, and 2. a second member in contact with said transducer assembly and integrally connected to said first member for providing chordal movement of said transducer assembly along said plate surface when the flexure of said positioning means is altered; and d. means for altering the flexure of said positioning means.
Claim 2
Dependent Claim
110 words
In a video tape scanner the combination comprising: a. a plate mounted for rotation about an axis and having a flat surface normal to said axis; b. a transducer assembly slideably mounted on said surface at the periphery of said plate; c. flexible positioning means adjacent said transducer assembly and having 1. a first member rigidly anchored to said plate, and 2. a second member in contact with said transducer assembly and integrally connected to said first member for providing chordal movement of said transducer assembly along said plate surface when the flexure of said positioning means is altered; and d. means for altering the flexure of said positioning means.
Claim 3
Dependent Claim
48 words
a second member in contact with said transducer assembly and integrally connected to said first member for providing chordal movement of said transducer assembly along said plate surface when the flexure of said positioning means is altered; and d. means for altering the flexure of said positioning means.
Claim 4
Dependent Claim
48 words
a second member in contact with said transducer assembly and integrally connected to said first member for providing chordal movement of said transducer assembly along said plate surface when the flexure of said positioning means is altered; and d. means for altering the flexure of said positioning means.
Claim 5
Dependent Claim
54 words
The combination according to Claim 1 wherein each said positioning means includes a tapped bore beTween said first and second members and wherein said means for altering the flexure of said positioning means is a screw in each of said tapped bores, with at least one of said bores and said screws being tapered.
Claim 6
Dependent Claim
75 words
a second member adjacent said magnetic head assembly and integrally connected to said first member for providing chordal movement of said second member along said plate surface toward and away from said magnetic head assembly, about a pivot point spaced from said surface, when the flexure of said positioning means is altered; and d. means for altering the flexure of said positioning means for moving said magnetic head assembly along a chord of said plate.
Claim 7
Dependent Claim
75 words
a second member adjacent said magnetic head assembly and integrally connected to said first member for providing chordal movement of said second member along said plate surface toward and away from said magnetic head assembly, about a pivot point spaced from said surface, when the flexure of said positioning means is altered; and d. means for altering the flexure of said positioning means for moving said magnetic head assembly along a chord of said plate.
Claim 8
Dependent Claim
8 words
a tranSducer assembly adjustably mounted on said disk,
Claim 9
Dependent Claim
8 words
a tranSducer assembly adjustably mounted on said disk,
Claim 10
Dependent Claim
60 words
positioning means on at least one side of said transducer assembly and in communication with said transducer assembly for moving said transducer assembly along a chord of said disk; and c. an opening extending through said upper guide parallel to said axis and positioned radially from said axis to provide access to said positioning means and to said transducer assembly.
Claim 11
Dependent Claim
60 words
positioning means on at least one side of said transducer assembly and in communication with said transducer assembly for moving said transducer assembly along a chord of said disk; and c. an opening extending through said upper guide parallel to said axis and positioned radially from said axis to provide access to said positioning means and to said transducer assembly.
Claim 12
Dependent Claim
11 words
The combination according to claim 2 wherein said screws are tapered.
Claim 13
Dependent Claim
14 words
The combination according to claim 2 wherein said bores and said screws are tapered.
Claim 14
Dependent Claim
57 words
The combination in accordance with claim 1 wherein each said positioning means is comprised of a threaded sleeve having a split end at the flat surface of said plate and having an unsplit end away from said surface, and wherein said means for altering the flexure of said positioning means is a screw threadable into said sleeve.
Claim 15
Dependent Claim
18 words
The combination of claim 5 wherein each said sleeve extends into said plate through a recess provided therein.
Claim 16
Dependent Claim
15 words
The combination according to claim 5 wherein said threaded sleeve and said screws are tapered.
Claim 17
Dependent Claim
63 words
The combination in accordance with claim 5 wherein said sleeve is split by a slot extending diametrically through a major portion of said sleeve so as to form two arms connected at the unsplit end of said sleeve and wherein one of said arms has a notch near the unsplit end of said sleeve so as to make said notched arm more flexible.
Claim 18
Dependent Claim
44 words
The combination in accordance with claim 8 wherein said notch is a slot which extends laterally through a wall portion of said sleeve into communication with said diametrically extending slot so as to form two hinge portions of the wall left between said slots.
Claim 19
Dependent Claim
70 words
A video tape scanner comprising in combination: a. a plate mounted for rotation about an axis and having a flat surface normal to said axis; b. a pair of magnetic head assemblies slideably mounted on said surface at diametrically opposite points on the periphery of said plate; c. a pair of flexible positioning means on opposite sides of each of said magnetic head assemblies each of said positioning means having
Claim 20
Dependent Claim
70 words
A video tape scanner comprising in combination: a. a plate mounted for rotation about an axis and having a flat surface normal to said axis; b. a pair of magnetic head assemblies slideably mounted on said surface at diametrically opposite points on the periphery of said plate; c. a pair of flexible positioning means on opposite sides of each of said magnetic head assemblies each of said positioning means having
Claim 21
Dependent Claim
108 words
For use in moving a transducer assembly along a chord of a video tape scanner disk, a positioning device comprising an internally threaded sleeve split at one end to form two spaced-apart coextensive arms connected flexibly through the unsplit end of said sleeve, one of said arms having means for anchoring said arm to said disk and the other arm having an extension for abutment against said transducer assembly and being free to move along said chord of said disk so that when a screw is driven into said sleeve said other arm and the position of said transducer assembly is shifted along said chord of said disk.
Claim 22
Dependent Claim
108 words
For use in moving a transducer assembly along a chord of a video tape scanner disk, a positioning device comprising an internally threaded sleeve split at one end to form two spaced-apart coextensive arms connected flexibly through the unsplit end of said sleeve, one of said arms having means for anchoring said arm to said disk and the other arm having an extension for abutment against said transducer assembly and being free to move along said chord of said disk so that when a screw is driven into said sleeve said other arm and the position of said transducer assembly is shifted along said chord of said disk.
Claim 23
Dependent Claim
24 words
The positioning device of claim 11 wherein said means for anchoring and said extension are coplanar collars integral with respective ones of said arms.
Claim 24
Dependent Claim
14 words
The positioning device of claim 11 wherein the thread within said sleeve is tapered.
Claim 25
Dependent Claim
97 words
A positioning device in accordance with claim 11 wherein said sleeve is split by a first slot extending diametrically through a major portion of said sleeve and wherein said sleeve is further split by a second slot extending laterally through a wall portion of said sleeve into communication with said first slot so as to form two hinge portions of the wall left between said slots. 15 A drum assembly for a video tape machine comprising in combination: a. upper and lower tape guides mounted on a bracket; b. a scanner between said tape guides and including
Claim 26
Dependent Claim
74 words
A drum assembly in accordance with claim 15 wherein said positioning means includes a. a body having a pair of flexibly connected spaced-apart members, one of them being next to said transducer assembly and free to move upon said disk, and the other of them being rigidly attached to said disk; b. a tapped bore in said body; and c. a tapered screw threadable into said bore for changing the spacing of said members.
Claim 27
Dependent Claim
144 words
In a video tape scanner an assembly for accurately positioning a transducer comprising in combination: a. a disk having a pair of spaced-apart recesses; b. a pair of positioning blocks, each above a respective one of said recesses and spaced from one another to receive said transducer assembly between them; c. a pair of anchor blocks fixed upon said disk, each located above a respective one of said recesses adjacent a respective one of said positioning blocks; d. a coupling member in each said recess for flexibly connecting each said positioning block to its adjacent anchor block; and e. a tapered screw threadably disposed between each positioning block and its adjacent anchor block to shift along a chord of said disk one positioning block relative to the other as said screw is turned for moving said transducer assembly along a chord of said disk.
Claim 28
Dependent Claim
144 words
In a video tape scanner an assembly for accurately positioning a transducer comprising in combination: a. a disk having a pair of spaced-apart recesses; b. a pair of positioning blocks, each above a respective one of said recesses and spaced from one another to receive said transducer assembly between them; c. a pair of anchor blocks fixed upon said disk, each located above a respective one of said recesses adjacent a respective one of said positioning blocks; d. a coupling member in each said recess for flexibly connecting each said positioning block to its adjacent anchor block; and e. a tapered screw threadably disposed between each positioning block and its adjacent anchor block to shift along a chord of said disk one positioning block relative to the other as said screw is turned for moving said transducer assembly along a chord of said disk.
Claim 29
Dependent Claim
40 words
An assembly in accordance with claim 17 wherein said coupling member is a sleeve split along part of its length into a fork whose prongs are integrally connected to one of said anchor blocks and its adjacent positioning block respectively.
Claim 30
Dependent Claim
61 words
An assembly according to claim 18 wherein said transducer assembly has an axis of symmetry along a radius of said disk and a pair of reference surfaces on opposite sides of said axis and parallel thereto for contacting said positioning blocks, each of which has a positioning surface parallel to said axis and facing a respective one of said reference surfaces.
Claim 31
Dependent Claim
36 words
An assembly in accordance with claim 18 wherein said sleeves are split along planes which are parallel to a plane defined by the axis of said disk and the axis of symmetry of said transducer assembly.
Claim 32
Dependent Claim
19 words
An assembly according to claim 18 wherein said sleeves have an internal tapered thread for receiving said tapered screw.
Claim 33
Dependent Claim
163 words
In a video tape scanner the combination comprising: a. a disk mounted for rotation about an axis and having a pair of spaced-apart recesses on equal radii; b. a transducer assembly having an axis of symmetry along the radius of said disk between said recesses mounted slideably on said disk; c. a pair of position blocks, each above a respective one of said recesses and spaced from one another to receive said transducer assembly snugly between them; d. a pair of anchor blocks fixed upon said disk, each located above a respective one of said recesses adjacent a respective one of said positioning blocks; e. a two-pronged fork in each said recess, the respective blocks above a given recess being integral with respective ones of the prongs of the fork in said recess; and f. means between the prongs of each said fork for varying their spread so as to shift the position of said transducer assembly along a chord of said disk.
Claim 34
Dependent Claim
163 words
In a video tape scanner the combination comprising: a. a disk mounted for rotation about an axis and having a pair of spaced-apart recesses on equal radii; b. a transducer assembly having an axis of symmetry along the radius of said disk between said recesses mounted slideably on said disk; c. a pair of position blocks, each above a respective one of said recesses and spaced from one another to receive said transducer assembly snugly between them; d. a pair of anchor blocks fixed upon said disk, each located above a respective one of said recesses adjacent a respective one of said positioning blocks; e. a two-pronged fork in each said recess, the respective blocks above a given recess being integral with respective ones of the prongs of the fork in said recess; and f. means between the prongs of each said fork for varying their spread so as to shift the position of said transducer assembly along a chord of said disk.
Claim 35
Dependent Claim
18 words
The combination of claim 22 wherein each said fork is a cylinder split along part of its length.
Claim 36
Dependent Claim
36 words
The combination of claim 23 wherein each said cylinder is split along a plane that is parallel to the plane defined by the axis of said disk and the axis of symmetry of said transducer assembly.
Claim 37
Dependent Claim
33 words
The combination of claim 23 wherein each saiD cylinder has an internal tapered thread and wherein said means for spreading the prongs of said forks are tapered screws turnable within said internal threads.
Claim 38
Dependent Claim
161 words
A video scanner comprising in combination: a. a disk mounted for rotation about an axis and having a flat surface normal to said axis and a peripheral rim normal to said surface with a pair of openings spaced apart 180*; b. a pair of transducer assemblies mounted slideably upon said surface near the periphery of said disk, each carrying an electromagnetic transducer protruding through a respective one of said openings; c. a pair of recesses in said disk on opposite sides of each of said transducer assemblies; d. a two-pronged fork in each said recess, each fork having one of its prongs in abutment with said transducer assembly and the other of its prongs remote from said transducer assembly and rigidly anchored to said disk; and e. means in each said fork for gradually varying the spread between its prongs whereby the position of both of said transducers may be shifted along a chord of said disk within their respective openings.
Claim 39
Dependent Claim
161 words
A video scanner comprising in combination: a. a disk mounted for rotation about an axis and having a flat surface normal to said axis and a peripheral rim normal to said surface with a pair of openings spaced apart 180*; b. a pair of transducer assemblies mounted slideably upon said surface near the periphery of said disk, each carrying an electromagnetic transducer protruding through a respective one of said openings; c. a pair of recesses in said disk on opposite sides of each of said transducer assemblies; d. a two-pronged fork in each said recess, each fork having one of its prongs in abutment with said transducer assembly and the other of its prongs remote from said transducer assembly and rigidly anchored to said disk; and e. means in each said fork for gradually varying the spread between its prongs whereby the position of both of said transducers may be shifted along a chord of said disk within their respective openings.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |