Diamond pickup stylus with good grindability

Details Diamond pickup stylus with good grindability Diamond pickup stylus with good grindability

1982-07-30

1985-02-05

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Electrical modification or sensing of storage medium

369173, G11B 900, G11B 300

Patent

active

044981635

ABSTRACT:
An electrostatic capacitance type pickup stylus for use on an information storage disc comprises a crystal of diamond including a sliding face for slidable contact with the information storage disc, an electrode face supporting thereon a conductive electrode layer for detecting signals on the information storage disc as changes in electrostatic capacitance, a pair of first and second angularly spaced back faces adjoining the electrode face, and a pair of first and second angularly spaced guide faces adjoining each other and the first and second back faces, respectively. The sliding face is in the form of a pentagon defined by ridges respectively of the electrode face, first and second back faces, and first and second guide faces, the first and second back faces being symmetrical with respect to a line passing through a central point on the ridge of the electrode face and a junction between the ridges of the first and second guide faces, the first and second guide faces being symmetrical with respect to the line. The first and second back and guide faces are located in areas in which they can easily ground without causing damages to ridges between the adjoining faces.

REFERENCES:
patent: 3848876 (1974-11-01), Joschko et al.
patent: 3871664 (1975-03-01), Huges
patent: 3877705 (1975-04-01), Joschko et al.
patent: 4199782 (1980-04-01), Wada et al.
patent: 4273967 (1981-06-01), Wada et al.
patent: 4340954 (1982-07-01), Chio et al.
patent: 4357699 (1982-11-01), Takehara et al.

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