US4455641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear tracking system
Assignee: Dennesen Electrostatics Inc
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Filing: 1979-12-26
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Granted: 1984-06-19
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Expires: 1999-12-26
Abstract
Abstract In a linear tone arm tracking system for a record player where the stylus tone arm moves on a guiderail across a recording, eg. a record disc on a turntable, an improvement is provided in which the stylus tone arm is connected to a partial sleeve, which sleeve hovers partially over the guiderail and means, such as air pressure means, causes the partial sleeve to hover over the guiderail in proximity therewith, so that when the stylus rides in the record groove and is laterally shifted thereby, the tone arm and partial sleeve readily shift over the guiderail in response to the shift of the stylus. Further provided is a means for raising and lowering the guiderail which adjusts the elevation of the partial sleeve and tone arm and accordingly adjusts the vertical tracking angle of the stylus in the record groove.
Inventors
- 👤 Alan P. Sliski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:36
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/10; G11B3/34; G11B3/38
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
148 words
In a linear tone arm tracking system for a record player where the stylus tone arm moves on a guideway across a recording, the improvement comprising a carriage for said guideway, which carriage includes a partial sleeve connected to said tone arm at a point removed from the stylus thereof; said sleeve fitting partially over said guideway, said partial sleeve having a substantially centrol portion and beveled end portions extending from said central portion to the ends of said sleeve so that said sleeve diminishes in surface area from said centrol portion outwardly towards said ends and means to cause said sleeve to hover over said guideway in substantially symmetrical proximity therewith so that when said stylus rides in a groove of a recording and is laterally shifted thereby, said tone arm and partial sleeve readily shift over said guideway in response to the shift of said stylus.
Claim 2
Dependent Claim
148 words
In a linear tone arm tracking system for a record player where the stylus tone arm moves on a guideway across a recording, the improvement comprising a carriage for said guideway, which carriage includes a partial sleeve connected to said tone arm at a point removed from the stylus thereof; said sleeve fitting partially over said guideway, said partial sleeve having a substantially centrol portion and beveled end portions extending from said central portion to the ends of said sleeve so that said sleeve diminishes in surface area from said centrol portion outwardly towards said ends and means to cause said sleeve to hover over said guideway in substantially symmetrical proximity therewith so that when said stylus rides in a groove of a recording and is laterally shifted thereby, said tone arm and partial sleeve readily shift over said guideway in response to the shift of said stylus.
Claim 3
Dependent Claim
21 words
The tracking system of claim 1 wherein said guideway emits a gas layer thereon to support said sleeve over said guideway.
Claim 4
Dependent Claim
24 words
The tracking system of claim 1 wherein said guideway and said sleeve are magnetized with opposed polarities to support said sleeve over said guideway.
Claim 5
Dependent Claim
24 words
The tracking system of claim 1, 2 or 3 wherein said guideway defines a ridge and said partial sleeve contours partially over said ridge.
Claim 6
Dependent Claim
29 words
The tracking system of claim 4 wherein said ridge is rounded in cross-section and said partial sleeve is curved in cross-section to fit over said guideway in spaced relationship.
Claim 7
Dependent Claim
24 words
The tracking system of claim 1 wherein said sleeve and thus said tone arm are free to pivot sectionally with respect to said guideway.
Claim 8
Dependent Claim
25 words
The tracking system of claim 1 wherein said partial sleeve and thus said tone arm are pivotable sectionally and laterally with respect to said guideway.
Claim 9
Dependent Claim
26 words
The tracking system of claim 1 wherein said partial sleeve and thus said tone arm can be readily lifted off said guideway and replaced as desired.
Claim 10
Dependent Claim
25 words
The tracking system of claim 1, 2 or 3 wherein said partial sleeve extends on both sides of said tone arm at an angle therewith.
Claim 11
Dependent Claim
14 words
The tracking system of claim 1 mounted proximate a record turntable for use therewith.
Claim 12
Dependent Claim
14 words
The tracking system of claim 1 mounted proximate a recording cylinder for use therewith.
Claim 13
Dependent Claim
66 words
The tracking system of claim 1 wherein said guideway is an apertured hollow compressed air tube and said partial sleeve is a partial cylindrical member which fits over said tube in spaced relationship therewith, and the hover means is a compressed air source which supplies compressed air into said tube and out said apertures to support said partial sleeve in a spaced manner over said guideway.
Claim 14
Dependent Claim
27 words
The tracking system of claim 1 wherein said carriage emits a gas layer downwardly onto said guideway to support said carriage and said sleeve over said guideway.
Claim 15
Dependent Claim
28 words
The tracking system of claim 1, 2 or 3 wherein said guideway is adjustable in height to adjust the vertical tracking angle of said tone arm and stylus.
Claim 16
Dependent Claim
49 words
The tracking system of claim 1, 2, 3 or 12 wherein said guideway is supported on at least one pivotable leg above a base and means to pivot said pivot leg to raise or lower said guideway and adjust the vertical tracking angle of said tone arm and stylus.
Claim 17
Dependent Claim
20 words
The tracking system of claim 15 wherein at least a pair of pivotable legs connect said guideway with said base.
Claim 18
Dependent Claim
31 words
The tracking system of claim 15 wherein a threaded member mounted between said guideway and said support member is turned to adjust the height of said guideway relative to said base.
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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) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |