US3997174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turntable mat
Assignee: Sony Corp
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Filing: 1975-03-31
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Granted: 1976-12-14
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Expires: 1995-03-31
Abstract
Abstract A mat for a phonograph record turntable is made up of at least one rubber or other flexible enclosure defining at least one sealed interior space which contains a fluid material, preferably in the form of a viscous liquid, so as to provide a cushioned, vibration-damping record supporting surface which conforms to the shape of a warped or otherwise distorted phonograph record placed thereon. In order to avoid the accumulation of the liquid at any one portion of the mat when the turntable is not horizontally disposed, the interior of the mat may be divided into a plurality of liquid-containing spaces which are isolated from each other, as by partitions therebetween, and/or each interior space may further contain absorbent material which takes up the viscous liquid. The vibration-damping properties of the mat may be enhanced by providing solid particles which float in the viscous liquid.
Inventors
- 👤 Isao Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:36
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/2009; G11B19/2018; G11B3/00; G11B3/60
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
68 words
A mat for a phonograph record turntable comprising: at least one flexible enclosure defining at least one sealed interior space and adapted to be disposed on a turntable, a fluid material disposed in said space so that said flexible enclosure provides a cushioned, vibration-damping support surface for a phonograph record which conforms to the shape of the latter, said space further containing particles floating in said fluid material.
Claim 2
Dependent Claim
68 words
A mat for a phonograph record turntable comprising: at least one flexible enclosure defining at least one sealed interior space and adapted to be disposed on a turntable, a fluid material disposed in said space so that said flexible enclosure provides a cushioned, vibration-damping support surface for a phonograph record which conforms to the shape of the latter, said space further containing particles floating in said fluid material.
Claim 3
Dependent Claim
33 words
A mat according to claim 1 in which said fluid material and said particles have substantially the same specific gravity so that said particles will be substantially uniformly dispersed within said fluid material.
Claim 4
Dependent Claim
15 words
A mat according to claim 1 in which said fluid material is a viscous liquid.
Claim 5
Dependent Claim
15 words
A mat according to claim 3 in which said viscous liquid is a silicon oil.
Claim 6
Dependent Claim
31 words
A mat according to claim 1 in which said flexible enclosure includes upper and lower superposed walls having edge portions which are secured together to define said sealed interior space therebetween.
Claim 7
Dependent Claim
21 words
A mat according to claim 5 in which at least one of said edge portions slopes inwardly toward said upper wall.
Claim 8
Dependent Claim
45 words
A mat according to claim 5 in which said edge portions extend generally cicumferentialy at the radially inner and outer sides of said flexible enclosure, and said edge portions slope inwardly toward said upper wall at both said inner and outer sides of the enclosure.
Claim 9
Dependent Claim
72 words
A mat for a phonograph record turntable comprising: at least one flexible enclosure defining at least one sealed interior space and adapted to be disposed on a turntable, and a fluid material disposed in said space so that said flexible enclosure provides a cushioned, vibration-damping support surface for a phonograph record which conforms to the shape of the latter, said space further containing an absorbent material which takes up said fluid material.
Claim 10
Dependent Claim
72 words
A mat for a phonograph record turntable comprising: at least one flexible enclosure defining at least one sealed interior space and adapted to be disposed on a turntable, and a fluid material disposed in said space so that said flexible enclosure provides a cushioned, vibration-damping support surface for a phonograph record which conforms to the shape of the latter, said space further containing an absorbent material which takes up said fluid material.
Claim 11
Dependent Claim
18 words
A mat according to claim 8 in which said absorbent material is in the form of a sheet.
Claim 12
Dependent Claim
13 words
A mat according to claim 8 in which said absorbent material is sponge-like.
Claim 13
Dependent Claim
13 words
A mat according to claim 8 in which said absorbent material is fibrous.
Claim 14
Dependent Claim
31 words
A mat according to claim 8 in which said flexible enclosure includes upper and lower superposed walls having edge portions which are secured together to define said sealed interior space therebetween.
Claim 15
Dependent Claim
21 words
A mat according to claim 12 in which at least one of said edge portions slopes inwardly toward said upper wall.
Claim 16
Dependent Claim
45 words
A mat according to claim 12 in which said edge portions extend generally circumferentially at the radially inner and outer sides of said flexible enclosure, and said edge portions slope inwardly toward said upper wall at both said inner and outer sides of the enclosure.
Claim 17
Dependent Claim
15 words
A mat according to claim 8 in which said fluid material is a viscous liquid.
Claim 18
Dependent Claim
14 words
A mat according to claim 15 in which said viscous liquid is silicon oil.
References Cited (Backward Citations)
US1446289A
Cited
US3591122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |