Patent US3992017A successfully refreshed from Google Patents.
US3992017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pickup cartridge
Assignee: Sony Corp
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Filing: 1974-11-22
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Granted: 1976-11-16
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Expires: 1994-11-22
Abstract
Abstract A pickup cartridge having a vibrating member including a cantilever arm with a reproducing stylus and a permanent magnet, an elastromeric damping member formed into a come or the like shape for supporting the vibrating member as its fulcrum, and a holder supporting the damping member.
Inventors
- 👤 Yoshihisa Mori
- 👤 Kazuo Shimura
- 👤 Hiroyuki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:48
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/16; H04R1/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
A pickup cartridge comprising: A. vibrating means comprising a cantilever arm; B. an elastomeric support and damper member in the form of a centrally apertured member formed as a surface of revolution and comprising two major surfaces, one generally convex and the other generally concave, said vibrating means being supported in the aperture of said member, said member extending outwardly from the axis of said arm to the outer perimeter of said member, whereby said vibrating means pivots about axes that pass transversely through said vibrating means at the region thereof grasped by the perimeter of said aperture, said region being offset to one side of a plane passing through said outer perimeter; C. a holder for supporting said elastomeric member along said outer perimeter; and D. fibers extending outwardly from the center of said support member along generatrices thereof providing a greater stiffness in the axial direction of the member than in a direction perpendicular thereto.
Claim 2
Dependent Claim
157 words
A pickup cartridge comprising: A. vibrating means comprising a cantilever arm; B. an elastomeric support and damper member in the form of a centrally apertured member formed as a surface of revolution and comprising two major surfaces, one generally convex and the other generally concave, said vibrating means being supported in the aperture of said member, said member extending outwardly from the axis of said arm to the outer perimeter of said member, whereby said vibrating means pivots about axes that pass transversely through said vibrating means at the region thereof grasped by the perimeter of said aperture, said region being offset to one side of a plane passing through said outer perimeter; C. a holder for supporting said elastomeric member along said outer perimeter; and D. fibers extending outwardly from the center of said support member along generatrices thereof providing a greater stiffness in the axial direction of the member than in a direction perpendicular thereto.
Claim 3
Dependent Claim
15 words
A pickup cartridge as claimed in claim 1 in which said fibers are carbon fibers.
Claim 4
Dependent Claim
18 words
A pickup cartridge as claimed in claim 1, wherein a permanent magnet is attached to said cantilever arm.
Claim 5
Dependent Claim
22 words
A pickup cartridge as claimed in claim 3, wherein said permanent magnet is fixed to said cantilever arm by a supporting sleeve.
Claim 6
Dependent Claim
140 words
A pickup cartridge comprising: A. a holder; B. vibrating means comprising a cantilever arm and a reproducing stylus attached thereto at one end thereof; C. an elastomeric support and damper member for supporting said vibrating means, the periphery of the elastomeric member being fixed to said holder, said elastomeric member having a thickness substantially less than the maximum distance between points on said periphery and being formed as a surface of revolution a line other than one which is perpendicular to the axis of revolution and having a greater stiffness in the axial direction of the member than in a direction perpendicular thereto, said vibrating means extending through a central aperture in said member and being pivotally held thereby; and D. fibers embedded in said elestomeric elastomeric and extending outwardly from the center of said support member along generatrices thereof.
Claim 7
Dependent Claim
140 words
A pickup cartridge comprising: A. a holder; B. vibrating means comprising a cantilever arm and a reproducing stylus attached thereto at one end thereof; C. an elastomeric support and damper member for supporting said vibrating means, the periphery of the elastomeric member being fixed to said holder, said elastomeric member having a thickness substantially less than the maximum distance between points on said periphery and being formed as a surface of revolution a line other than one which is perpendicular to the axis of revolution and having a greater stiffness in the axial direction of the member than in a direction perpendicular thereto, said vibrating means extending through a central aperture in said member and being pivotally held thereby; and D. fibers embedded in said elestomeric elastomeric and extending outwardly from the center of said support member along generatrices thereof.
Claim 8
Dependent Claim
18 words
A pickup cartridge as claimed in claim 5, wherein said elastomeric member is formed into a frusto-conical shape.
Claim 9
Dependent Claim
17 words
A pickup cartridge as claimed in claim 5, wherein said elastomeric member has a generally hemispherical shape.
References Cited (Backward Citations)
US3377439A
Cited
GB1112130A
Cited
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 |