US4492998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette tape recorder
Assignee: Pioneer Corp
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Filing: 1982-09-07
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Granted: 1985-01-08
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Expires: 2002-09-07
Abstract
Abstract A cassette deck includes a reel shaft on the tape supply side provided with a tapered portion for engaging a cassette reel and an elastic member supporting the reel from below which prevents the reel from striking the lower wall of the cassette case due to vibration of the deck or the like. The improvement effectively eliminates the generation of wow due to tape deck vibration.
Inventors
- 👤 Testuro Kamimura
- 👤 Seiichiro Matsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:46
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/50; G11B15/26; G11B15/32
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
A cassette tape recorder of the type comprising at least one rotatable shaft unit for extending through an aperture in a cassette reel, said cassette reel having reel projections extending toward said shaft unit from the periphery of said aperture, said rotatable shaft unit having shaft unit projections thereon for matingly engaging said reel projections, with said shaft being adapted to be rotated by said cassette reel when said cassette reel rotates in a tape supply direction, said shaft unit further including a tapered portion adjacent said reel having a sloping surface coaxial with a center axis of said shaft unit for supporting said cassette reel at a position coaxial with said center axis along said sloping surface, thus insuring positive centering of said cassette reel and minimizing wow.
Claim 2
Dependent Claim
129 words
A cassette tape recorder of the type comprising at least one rotatable shaft unit for extending through an aperture in a cassette reel, said cassette reel having reel projections extending toward said shaft unit from the periphery of said aperture, said rotatable shaft unit having shaft unit projections thereon for matingly engaging said reel projections, with said shaft being adapted to be rotated by said cassette reel when said cassette reel rotates in a tape supply direction, said shaft unit further including a tapered portion adjacent said reel having a sloping surface coaxial with a center axis of said shaft unit for supporting said cassette reel at a position coaxial with said center axis along said sloping surface, thus insuring positive centering of said cassette reel and minimizing wow.
Claim 3
Dependent Claim
36 words
A cassette tape recorder as claimed in claim 1, wherein said reel projections have radially inward ends and said tapered surface supports said cassette reel through abutment with said radially inward ends of said reel projections.
Claim 4
Dependent Claim
28 words
A cassette tape recorder as claimed in claim 1, wherein said tapered surface supports said cassette reel through abutment with said reel at said periphery of said aperture.
Claim 5
Dependent Claim
55 words
A cassette tape recorder as claimed in claim 1, wherein said reel shaft comprises a central shaft (20b 1 ), a shaft member (20b 2 ) mounted on said central shaft, and a hub (20b 3 ) slidably mounted on said shaft member, said tapered surface comprising a generally conical surface provided on said hub.
Claim 6
Dependent Claim
38 words
A cassette tape recorder as claimed in claim 4, wherein said tapered surface supports said cassette reel via abutment of said tapered surface with inner radial ends of said reel projections and with said periphery of said aperture.
Claim 7
Dependent Claim
30 words
A cassette tape recorder as claimed in claim 5, said hub being maintained slightly spaced from a stopping member atop said central shaft when supporting said fully wound cassette reel.
Claim 8
Dependent Claim
66 words
A cassette tape recorder as claimed in claim 1, wherein said reel shaft comprises a central shaft (20b 1 ), a shaft member (20b 2 ) mounted on said central shaft, and a hub (20b 3 ) slidably mounted on said shaft member, said tapered portion comprising a series of radially-extending ribs formed on said hub and having outer radial surfaces for engaging said cassette reel.
Claim 9
Dependent Claim
71 words
A cassette tape recorder as claimed in claim 1, wherein said reel shaft comprises a central shaft (20b 1 ), a shaft member (20b 2 ) mounted on said central shaft, and a hub (20b 3 ) slidably mounted on said shaft member, said hub being formed of a first portion having said shaft unit projections thereon and a collar portion slidably fitted to said shaft member below said first portion.
Claim 10
Dependent Claim
32 words
A cassette tape recorder as claimed in claim 1, further comprising an elastic member urging said tapered portion upwardly with a force substantially equal to the weight of a fully-wound cassette reel.
Claim 11
Dependent Claim
25 words
A cassette tape recorder as claimed in claim 9, said elastic member comprising a spring urging said hub upwardly with respect to said shaft member.
Claim 12
Dependent Claim
26 words
A cassette tape recorder as claimed in claim 9, said elastic member comprising a spring urging said shaft member upwardly with respect to said central shaft.
Claim 13
Dependent Claim
32 words
A cassette tape recorder as claimed in claim 11, further comprising a spring located between said hub and said shaft member for biasing said hub upwardly with respect to said spring member.
Claim 14
Dependent Claim
33 words
A device as claimed in claim 1, said cassette recorder being of the two-way play type, such that both reel shafts of said recorder comprise a reel shaft on a tape supply side.
Claim 15
Dependent Claim
18 words
A device as claimed in claim 13, including a gear mounted on said shaft member via friction means.
Claim 16
Dependent Claim
17 words
A device as claimed in claim 13, further including a motor for selectively rotating said central shaft.
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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |