US4495611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration system of pickup cartridge of record player
Assignee: Nippon Gakki Co Ltd
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Filing: 1982-08-06
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Granted: 1985-01-22
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Expires: 2002-08-06
Abstract
Abstract In the vibration system of a pickup cartridge of a record player, the object of preliminarily applying a required deforming bias, in a direction opposite to the direction of the vertical tracking force, to the damper which deforms with the application of a vertical tracking force, and of releasing this deforming bias when the stylus is actually applied with a vertical tracking force, is achieved by arranging the cantilever-supporting tension wire which pulls the cantilever in the rearward direction, so as to pass through the damper at a position eccentric relative to the center of this damper which is disposed between the armature-carrying cantilever and the tension wire holder.
Inventors
- 👤 Yoshiaki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:26
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/16; G; G11; G11B; G11B3/00; G11B3/44; G11B3/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A vibration system of a pickup cartridge of a record player, comprising: a cantilever having a stylus tip at its forward end portion; an armature secured to a rear end portion of said cantilever; a damper disposed rearwardly of both the rear end portion of said cantilever and said armature; a tension wire coupled to a rear end portion of said cantilever to rearwardly pull said cantilever; and a holder for holding a rear end portion of said tension wire; said damper being positioned between the rear end portion of said cantilever and said holder; said armature, said damper and said holder being disposed so that their respective central axial lines are in alignment, and said tension wire is disposed along an axial line displaced downwardly of said aligned central axial lines.
Claim 2
Dependent Claim
132 words
A vibration system of a pickup cartridge of a record player, comprising: a cantilever having a stylus tip at its forward end portion; an armature secured to a rear end portion of said cantilever; a damper disposed rearwardly of both the rear end portion of said cantilever and said armature; a tension wire coupled to a rear end portion of said cantilever to rearwardly pull said cantilever; and a holder for holding a rear end portion of said tension wire; said damper being positioned between the rear end portion of said cantilever and said holder; said armature, said damper and said holder being disposed so that their respective central axial lines are in alignment, and said tension wire is disposed along an axial line displaced downwardly of said aligned central axial lines.
Claim 3
Dependent Claim
21 words
A vibration system according to claim 1, in which: said armature, said damper and said holder are of a circular shape.
Claim 4
Dependent Claim
40 words
A vibration system according to claim 1, in which: said cantilever has a tubular rear end portion, and said tension wire has a forward end portion fixed to a fixing member secured within the tubular rear end of said cantilever.
Claim 5
Dependent Claim
73 words
A vibration system according to claim 1, in which: said holder has a through-hole formed along an axial line displaced below its central axial line, and a screw hole formed to extend from its periphery to said through-hole, and said tension wire is provided with a wire sleeve around its rear end portion, and is fixed, under tension, to said holder via said wire sleeve by a screw engaged in said screw hole.
Claim 6
Dependent Claim
12 words
A system as in claim 1 wherein said armature is a magnet.
Claim 7
Dependent Claim
15 words
A system as in claim 1 wherein said armature is made of a magnet-permeable material.
Claim 8
Dependent Claim
12 words
A system as in claim 2 wherein said armature is a magnet.
Claim 9
Dependent Claim
15 words
A system as in claim 2 wherein said armature is made of a magnet-permeable material.
Claim 10
Dependent Claim
12 words
A system as in claim 3 wherein said armature is a magnet.
Claim 11
Dependent Claim
15 words
A system as in claim 3 wherein said armature is made of a magnet-permeable material.
Claim 12
Dependent Claim
12 words
A system as in claim 4 wherein said armature is a magnet.
Claim 13
Dependent Claim
15 words
A system as in claim 4 wherein said armature is made of a magnet-permeable material.
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |