Capacitance detection type stylus with diamond body and electrod

Details Capacitance detection type stylus with diamond body and electrod Capacitance detection type stylus with diamond body and electrod

1981-03-25

1982-11-02

Stephan, Steven L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

369126, G11B 344

Patent

active

043576990

ABSTRACT:
A stylus for detecting signals as electrostatic capacitance variations of the information recorded in the form of geometric variations on a disc record comprises a diamond body and a stylus electrode attached to one surface of the body which makes contact with the disc record. The electrode extends downward to the plane of the contact face of the diamond body to detect the recorded information. The crystallographic orientations of the diamond body are such that the contact face is inclined at a predetermined angle to a crystallographic plane having the tendency to wear substantially at the same rate as the wearing rate of the electrode at its downward tip so that the electrode keeps contact with the record surface for a long period of use.

REFERENCES:
patent: 3781020 (1973-12-01), Batsch et al.
patent: 3848876 (1974-11-01), Joschko et al.
patent: 3877705 (1975-04-01), Joschko et al.

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