US3885245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning device
Assignee: Sanyo Electric Co Ltd
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Filing: 1972-09-11
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Granted: 1975-05-20
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Expires: 1992-09-11
Abstract
Abstract A scanning device for a magnetic recording and/or reproducing apparatus for moving a magnetic head along a predetermined spiral path to permit the recording or reproduction of sound on a magnetically-coated frame of a photographic slide. Preferably, the scanning device includes a support member, a rotary disc rotatably mounted on the support member, a motor for rotating the rotary disc, a radially-movable magnetic head mounted on the rotary disc and a motive means operatively associated with the motor for shifting the magnetic head radially along the rotary disc concurrent with the rotation of the rotary disc so that the locus of movement of the magnetic head is a spiral. The motive means can include a rotatable cam member whose cam surface engages the magnetic head and which is rotated through the agency of a pulley attached to the rotary disc and having a planetarylike motion, which motion can be generated by connecting the pulley with a belt to the support member and causing the rotary disc to rotate. Most preferably, the scanning device further includes a detecting means for sensing a predetermined radial end position of the magnetic head; and first operative means energized by the detecting means upon sensing the predetermined radial end position to disengage the motive means from shifting the magnetic head and to reset the magnetic head back to a predetermined radial starting position.
Inventors
- 👤 Mitsuo Nakatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:49
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B21/04; G11B21/043
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
163 words
A scanning device for a magnetic recording or reproducing apparatus comprising: a. a support member, b. a rotary disc rotatably mounted on said support member, c. a motor means mounted on said support means for driving said rotary disc, d. a radially-movable magnetic head mounted on said rotary disc, e. an engaging member, fixedly attached to said support member, said support member having a circular surface with a center coinciding with the center of rotation of said rotary disc, f. a planetary wheel means rotatably mounted on said rotary disc, g. connecting means operatively coupling said engaging member and said planetary wheel means for rotating said planetary wheel means about its axis upon the rotation of said rotary disc, and h. motive means operatively coupling said planetary wheel means and said magnetic head to translate the rotational movement of said planetary wheel means into the radial movement of said magnetic head, whereby the locus of movement of said magnetic head is a spiral.
Claim 2
Dependent Claim
163 words
A scanning device for a magnetic recording or reproducing apparatus comprising: a. a support member, b. a rotary disc rotatably mounted on said support member, c. a motor means mounted on said support means for driving said rotary disc, d. a radially-movable magnetic head mounted on said rotary disc, e. an engaging member, fixedly attached to said support member, said support member having a circular surface with a center coinciding with the center of rotation of said rotary disc, f. a planetary wheel means rotatably mounted on said rotary disc, g. connecting means operatively coupling said engaging member and said planetary wheel means for rotating said planetary wheel means about its axis upon the rotation of said rotary disc, and h. motive means operatively coupling said planetary wheel means and said magnetic head to translate the rotational movement of said planetary wheel means into the radial movement of said magnetic head, whereby the locus of movement of said magnetic head is a spiral.
Claim 3
Dependent Claim
24 words
The scanning device of claim 1 wherein said motive means includes a rotatable cam member having a cam surface for shifting said magnetic head.
Claim 4
Dependent Claim
34 words
The scanning device of claim 2 wherein said motive means includes an idler wheel mechanically-connected to said cam member to co-rotate therewith, said idler wheel being adapted to rotatably engage said planetary wheel means.
Claim 5
Dependent Claim
48 words
The scanning device of claim 3 wherein the axis of rotation of said idler wheel is disposed in a first end portion of an idler arm pivotally-connected to said rotary disc, said idler arm being spring-biased to maintain said idler in rotational engagement with said planetary wheel means.
Claim 6
Dependent Claim
32 words
The scanning device of claim 4 wherein said magnetic head is connected to one end of a supporting arm, the other end of which engages said cam surface of said cam member.
Claim 7
Dependent Claim
69 words
The scanning device of claim 1 wherein said engaging member is a ring-shaped member, the outer circumference of which is disposed closer to the center of rotation of said rotary disc than is the furthest point of said planetary wheel means and said planetary wheel means includes a planetary pulley; and wherein said connecting means is a belt, said belt engaging said planetary pulley and said ring shaped member.
Claim 8
Dependent Claim
30 words
The scanning device of claim 6 wherein said rotary disc includes a coaxially-mounted driving ring, said ring being adapted to be circumferentially-rotated by a belt connected to said motor means.
Claim 9
Dependent Claim
60 words
The scanning device of claim 1 further comprising detecting means for sensing at least a predetermined radial end position of said magnetic head; and first operative means energized by said detecting means upon sensing said end position to disengage said motive means from shifting said magnetic head and to reset said magnetic head back to a predetermined radial starting position.
Claim 10
Dependent Claim
51 words
The scanning device of claim 8 further comprising an elastic means for storing kinetic energy corresponding to the displacement of said magnetic head from the predetermined radial starting position whereby, upon said disengagement of said motive means, said elastic means automatically resets said magnetic head to said predetermined radial starting position.
Claim 11
Dependent Claim
35 words
The scanning device of claim 8 further coMprising second operative means for disengaging said motor means from rotating said rotary disc when said detecting means senses said predetermined radial end position of said magnetic head.
Claim 12
Dependent Claim
23 words
The scanning device of claim 8 wherein said motive means includes a rotatable cam member having a cam surface shifting said magnetic head.
Claim 13
Dependent Claim
35 words
The scanning device of claim 11 wherein said motive means further includes an idler wheel mechanically-connected to said cam member to co-rotate therewith, said idler wheel being adapted to rotatably engage said planetary wheel means.
Claim 14
Dependent Claim
20 words
The scanning device of claim 12 wherein said first operative means disengages said idler wheel and said planetary wheel means.
Claim 15
Dependent Claim
72 words
The scanning device of claim 13 further comprising an elastic means associated with said cam member for storing kinetic energy corresponding to the displacement of said magnetic head from said predetermined radial starting position whereby, upon the disengagement of said idler wheel and said planetary wheel means, said elastic means automatically resets said cam member to its initial rotational position which corresponds to said predetermined radial starting position of said magnetic head.
Claim 16
Dependent Claim
49 words
The scanning device of claim 13 wherein the axis of rotation of said idler wheel is disposed in a first end portion of an idler arm pivotally-connected to said rotary disc, said idler arm being spring-biased to maintain said idler wheel in rotational engagement with said planetary wheel means.
Claim 17
Dependent Claim
44 words
The scanning device of claim 15 wherein said idler arm includes a second end portion, said first operative means being adapted to engage said second end portion to rotate said idler arm in a direction disengaging said idler wheel and said planetary wheel means.
Claim 18
Dependent Claim
112 words
The scanning device of claim 16 wherein said detecting means comprises a spring-biased resetting lever pivotally connected to said rotary disc, one end of which engages said magnetic head; and said first operating means comprises a release lever displaced from said rotary disc and adapted to engage said second end portion of said idler arm; a plunger means for actuating said release lever; and an electrical switch for actuating said plunger means when the other end of said resetting lever comes in contact therewith, said other end of said resetting lever and said electrical switch being positioned relatively such that contact occurs at the predetermined radial end position of said magnetic head.
Claim 19
Dependent Claim
72 words
The scanning device of claim 17 wherein said rotary disc includes a coaxially-mounted driving ring; said motor means is provided with an axially-driven pulley in parallel with said driving ring; an idler disc is retractably disposed therebetween to transmit rotary motion to said rotary disc; and a second operative means is provided adapted to retract said idler disc when said detecting means senses said predetermined radial end position of said magnetic head.
Claim 20
Dependent Claim
98 words
The scanning device of claim 18 wherein said second operative means includes an electrically-actuated plunger means for retracting said idler disc, an electrical switch for actuating said plunger means and a stopping lever pivotally connected in a middle portion to said rotary disc and having a pair of ends, one end being adapted to engage said first-end portion of said idler arm, when said idler arm is rotated in a disengaging direction by said first operative means, in a manner such that the other end of said stopping lever actuates said electrical switch of the second operative means.
Claim 21
Dependent Claim
43 words
The scanning device of claim 19 wherein said one end of said stopping lever is provided with a slotted portion for receiving the top of said first end portion of said idler arm, when said idler arm is rotated in said disengaging 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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |