Head shell for record player tonearms

Details Head shell for record player tonearms Head shell for record player tonearms

1979-08-03

1981-05-26

Dixon, Jr., William R.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specified detail of transducer assembly support structure

264 291, 264108, 428542, G11B 310, B29D 302, B32B 904

Patent

active

042694167

ABSTRACT:
A head shell for a record player tonearm comprises a composite material essentially consisting of a thermoplastic resin and graphite powder. The composite material is prepared by kneading the components, rolled to impart a degree of orientation to the graphite powder particles, which are in the form of flaky graphite and then molded into a shell, along the surface of which the graphite particles are oriented. Head shells wherein the composite material is oxidized at the surface and head shells wherein the composite material is carbonized or graphitized are also included. A light weight, rigid head shell having a high specific modulus of elasticity is obtained through a simple procedure at low cost.

REFERENCES:
patent: 3918722 (1975-11-01), Nakajima et al.
patent: 3923309 (1975-12-01), Nakajima et al.
patent: 3957272 (1976-05-01), Yasuda
patent: 3980105 (1976-09-01), Myskowski
patent: 4086378 (1978-04-01), Kam et al.
patent: 4147364 (1979-04-01), Nakatsuka

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