US4344167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pickup device
Assignee: Individual
•
Filing: 1980-02-25
•
Granted: 1982-08-10
•
Expires: 2000-02-25
Abstract
Abstract A pickup device having an improved high fidelity in sound reproduction is provided. The pickup device comprises a vibration-absorbing member which is attached closely to a part of the head shell base plate member to absorb harmful vibrations generated through the head shell in the cartridge.
Inventors
- 👤 Tadashi Iwasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:56
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; G11B3/46; H; H04; H04R; H04R1/00; H04R1/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
In a pickup device comprising a head shell having a head shell base member (1) made of single crystals or polycrystalline materials containing very hard ceramics as a main component thereof, a pickup cartridge (3) fixed directedly to a surface portion of the head shell base plate member (1), and a vibration-absorbing member (9); the improvement wherein: said vibration-absorbing member (9) is in the shape of a thin plate and is firmly attached directly to a part of the surface of said head shell base plate member (1) different from the surface portion of said head shell base plate member to which said pickup cartridge (3) is fixed, to absorb harmful vibrations generated in the pickup cartridge (3) through the head shell; said vibration-absorbing member (9) is composed mainly of polydiorganosiloxane and inorganic fine powders, said polydiorganosiloxane having an average molecular weight of not less than 15,000; and the hardness of said vibration-absorbing member (9) is within the range of from about 8 to about 30.
Claim 2
Dependent Claim
166 words
In a pickup device comprising a head shell having a head shell base member (1) made of single crystals or polycrystalline materials containing very hard ceramics as a main component thereof, a pickup cartridge (3) fixed directedly to a surface portion of the head shell base plate member (1), and a vibration-absorbing member (9); the improvement wherein: said vibration-absorbing member (9) is in the shape of a thin plate and is firmly attached directly to a part of the surface of said head shell base plate member (1) different from the surface portion of said head shell base plate member to which said pickup cartridge (3) is fixed, to absorb harmful vibrations generated in the pickup cartridge (3) through the head shell; said vibration-absorbing member (9) is composed mainly of polydiorganosiloxane and inorganic fine powders, said polydiorganosiloxane having an average molecular weight of not less than 15,000; and the hardness of said vibration-absorbing member (9) is within the range of from about 8 to about 30.
Claim 3
Dependent Claim
64 words
In the pickup device of claim 1, the further improvement wherein the pickup device comprises a fixing plate member (7) having a finger knob (8) extending therefrom, and wherein said vibration-absorbing member (9) is fixed by said fixing plate member (7) to a surface of said head shell base plate member (1), which is opposite the surface on which said cartridge (3) is fixed.
Claim 4
Dependent Claim
33 words
In the pickup device of claim 2, the further improvement wherein said vibration-absorbing member (9) and said cartridge (3) oppose each other on opposite surfaces of said head shell base plate member (1).
Claim 5
Dependent Claim
32 words
In the pickup device of claim 3, the further improvement comprising common connecting means (6a,6b) connecting said vibration-absorbing member (9) and said cartridge (3) to said head shell base plate member (1).
Claim 6
Dependent Claim
36 words
In the pickup device of claim 1 wherein said vibration-absorbing member (9) is fixed to an opposite surface of said head shell base plate member (1) from the surface to which said cartridge (3) is fixed.
Claim 7
Dependent Claim
33 words
In the pickup device of claim 1 wherein said vibration-absorbing member (9) is fixed to the same side of the surface of said head shell base plate member (1) as said cartridge (3).
Claim 8
Dependent Claim
34 words
In the pickup device of claim 1, the improvement wherein said head shell base plate member (1) is made of a very hard nitride ceramic material which contains silicon nitride as a main component.
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) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |