Patent US3994018A successfully refreshed from Google Patents.
US3994018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary head assembly having resilient positioning and restraining means mounting the head
Assignee: Sony Corp
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Filing: 1975-04-08
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Granted: 1976-11-23
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Expires: 1995-04-08
Abstract
Abstract A rotary head assembly is disclosed including a transducer for recording information on and reproducing information from a record medium. The transducer is resiliently supported by a resilient support member which, in turn, is secured to a transducer receiving structure, the latter being coupled to a rotary drive device for rotating the transducer about an axis of rotation to thereby permit information to be recorded on and reproduced from the record medium which is contacted by the transducer. In addition to resiliently supporting the transducer, the transducer receiving member also exerts a restraining force on the transducer which is opposite to the centrifugal force exerted thereon when the transducer is rotated.
Inventors
- 👤 Nobutoshi Kihara
- 👤 Katsumasa Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:57
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
A rotary head assembly comprising, a generally U-shaped frame having a pair of spaced apart arms which are joined together at one end and are capable of resilient flexing toward and away from each other, means for mounting said frame for movement in a circular path with the free end portions of said arms extending generally radially outward in respect to the center of such path, a head member for recording and/or reproducing information signals on a record medium and which is dimensioned to fit between said spaced apart arms with substantial clearance therebetween, and resilient support means extending between said arms and being secured intermediate the arms to said head member for supporting the latter in respect to said frame so that centrifugal movement of said head member in response to movement of said frame in said circular path is resiliently resisted by said resilient support means and by the resilient flexing of said arms.
Claim 2
Dependent Claim
156 words
A rotary head assembly comprising, a generally U-shaped frame having a pair of spaced apart arms which are joined together at one end and are capable of resilient flexing toward and away from each other, means for mounting said frame for movement in a circular path with the free end portions of said arms extending generally radially outward in respect to the center of such path, a head member for recording and/or reproducing information signals on a record medium and which is dimensioned to fit between said spaced apart arms with substantial clearance therebetween, and resilient support means extending between said arms and being secured intermediate the arms to said head member for supporting the latter in respect to said frame so that centrifugal movement of said head member in response to movement of said frame in said circular path is resiliently resisted by said resilient support means and by the resilient flexing of said arms.
Claim 3
Dependent Claim
33 words
A rotary head assembly according to claim 1; in which said resilient support means includes a plurality of elongated spring members extending substantially parallel to each other between said arms of the frame.
Claim 4
Dependent Claim
29 words
A rotary head assembly according to claim 2; in which said free end portions of the arms terminate in inwardly directed parts between which said elongated spring members extend.
Claim 5
Dependent Claim
22 words
A rotary head assembly according to claim 2 in which said spring members are constituted by respective elongated plates of resilient metal.
Claim 6
Dependent Claim
19 words
A rotary head assembly according to claim 2; in which said elongated spring members are constituted by resilient wires.
Claim 7
Dependent Claim
46 words
A rotary head assembly according to claim 5; in which said head member includes a transducer and a transducer mounting plate having said transducer secured to an end of said mounting plate, and said transducer mounting plate is supported on said wires midway between said arms.
Claim 8
Dependent Claim
20 words
A rotary head assembly according to claim 6; in which said mounting plate has depending tabs secured to said wires.
Claim 9
Dependent Claim
22 words
A rotary head assembly according to claim 2; in which said spring members are constituted by strips of resin-impregnated carbon fiber material.
Claim 10
Dependent Claim
36 words
A rotary head assembly according to claim 8; in which said arms have mortise-shaped recesses in which the respective ends of said strips are located and secured by thermosetting resin with said strips being under tension.
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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |