US3897069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing dust from a gramophone record
Assignee: Individual
•
Filing: 1974-04-04
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Granted: 1975-07-29
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Expires: 1994-04-04
Abstract
Abstract A device for removing dust from a gramophone record during the playing thereof includes a support which is arranged to be attached to the fixed base of a turntable of a record playing apparatus, and a brush which is arranged to track across the upper surface of a record mounted on the turntable, the fibres of the brush engaging in the record groove. The brush is provided on a pick-up nozzle which forms one end of an air duct means mounted on the support, the other end of the air duct means being connected in operation to a vacuum pump.
Inventors
- 👤 Michael Adrian Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:20
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/58; G11B3/5809; G11B3/5818; G11B3/5827; G11B3/5845
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
232 words
A device independent of a tone arm for removing the dust from a gramophone record during the playing thereof, said device comprising a support means adapted to have its bottom removably attached to a reproduction apparatus for the record, a downwardly directed dust pick-up nozzle, a brush mounted on the end of said nozzle, which brush is arranged to bear in operation against the upper surface of the record to support the nozzle, means for creating a vacuum, air duct means extending from said pick-up mozzle into and through said support means and thence from above the bottom of the support means to the vacuum creating means so as not to interfere with the removable attachment of the device to the reproduction apparatus, said air duct means being mounted on said support means in such a manner as to permit movement of said pick-up nozzle across the upper surface of the record while the nozzle is being supported by the brush, and the fibres of said brush being of such cross-section that in operation of said device the tips thereof engage in the groove of the upper surface of the record and thereby bring about tracking movement of said pick-up nozzle across the record as the record is played, said vacuum creating means serving during such tracking movement to suck dust from said surface of the record via said air duct means.
Claim 2
Independent Claim
232 words
A device independent of a tone arm for removing the dust from a gramophone record during the playing thereof, said device comprising a support means adapted to have its bottom removably attached to a reproduction apparatus for the record, a downwardly directed dust pick-up nozzle, a brush mounted on the end of said nozzle, which brush is arranged to bear in operation against the upper surface of the record to support the nozzle, means for creating a vacuum, air duct means extending from said pick-up mozzle into and through said support means and thence from above the bottom of the support means to the vacuum creating means so as not to interfere with the removable attachment of the device to the reproduction apparatus, said air duct means being mounted on said support means in such a manner as to permit movement of said pick-up nozzle across the upper surface of the record while the nozzle is being supported by the brush, and the fibres of said brush being of such cross-section that in operation of said device the tips thereof engage in the groove of the upper surface of the record and thereby bring about tracking movement of said pick-up nozzle across the record as the record is played, said vacuum creating means serving during such tracking movement to suck dust from said surface of the record via said air duct means.
Claim 3
Dependent Claim
89 words
A device according to claim 1, in which said air duct means includes a tubular shaft which is rotatably mounted in said support means, and a flexible tube which forms part of said air duct means between said pick-up nozzle and the tubular shaft, said flexible tube being at least partly housed in an arm member which is pivotally mounted on a support member secured to the tubular shaft, the axis about which the arm member pivots being substantially perpendicular to the axis about which the tubular shaft rotates.
Claim 4
Dependent Claim
65 words
A device according to claim 2, including an adjustable collar which tightly surrounds, but is slidable along, the tubular shaft, the collar bearing against said support means and serving as a bearing for the tubular shaft, permitting rotational movement of the shaft relative to said support means, and also as a means for adjusting the position of the tubular shaft relative to said support means.
Claim 5
Dependent Claim
16 words
A device according to claim 1, in which said support means has a permanently magnetized base.
Claim 6
Dependent Claim
20 words
A device according to claim 1, in which the fibres of said brush have a diameter of approximately 0.025 millimetre.
Claim 7
Dependent Claim
30 words
The combination of a device according to claim 1, in which the vacuum creating means is a vacuum pump, and in which the air duct means includes a flexible tube.
Claim 8
Dependent Claim
26 words
The combination according to claim 6, in which the vacuum pump is mounted in an enclosure adapted to attenuate the noise of the pump in operation.
Claim 9
Dependent Claim
20 words
The combination according to claim 7, in which the vacuum pump is resiliently mounted in said enclosure on spring means.
References Cited (Backward Citations)
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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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |