Patent US3992018A successfully refreshed from Google Patents.
US3992018A
Expired / Lapsed
US
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Method and apparatus for use in cleaning a gramophone disc
Assignee: Nytell Software LLC
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Filing: 1975-01-31
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Granted: 1976-11-16
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Expires: 1995-01-31
Abstract
Abstract A combination of a turntable for playing phonograph records, a lid covering the turntable, tone arm for tracking record grooves, and a cleaning element mounted on the lid for movement into contact with a constant annular area on the top side of the record for cleaning. A counterbalance weight controls the pressure of the cleaning element upon the record.
Inventors
- 👤 Dexter Robert Plummer
- 👤 Gerald Avison
- 👤 Colin Howard Stanwell-Smith
- 👤 Keith Douglas Ridler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:53
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/58; G11B3/5809; G11B3/5818; G11B3/5827
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
In combination: a turntable for receiving and rotating a grooved phonograph record; a lid for said turntable; a tone arm mounted on said turntable for tracking the grooves of said record; a cleaning element; and means for mounting said cleaning element on said lid for movement between a position out of contact with a record on said turntable and a position wherein said element contacts a constant annular area of the top surface of said record and extends along the surface of said record so as to clean the top surface of said record as said record rotates on said turntable.
Claim 2
Dependent Claim
101 words
In combination: a turntable for receiving and rotating a grooved phonograph record; a lid for said turntable; a tone arm mounted on said turntable for tracking the grooves of said record; a cleaning element; and means for mounting said cleaning element on said lid for movement between a position out of contact with a record on said turntable and a position wherein said element contacts a constant annular area of the top surface of said record and extends along the surface of said record so as to clean the top surface of said record as said record rotates on said turntable.
Claim 3
Dependent Claim
27 words
In combination according to claim 1 wherein the said mounting means includes a counterbalance weight to control the pressure of the cleaning element upon a disc record.
Claim 4
Dependent Claim
13 words
In combination according to claim 1 including a plurality of said cleaning elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |