Video disc pickup stylus

Details Video disc pickup stylus Video disc pickup stylus

1981-12-03

1983-11-29

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Electrical modification or sensing of storage medium

369173, G11B 1106, G11B 344

Patent

active

044184077

ABSTRACT:
A playback stylus adapted for use in recovering information recorded in an information disc record which acts as a first conductive plate of a capacitor. The stylus includes a body of a first dielectric material having a first dielectric constant, a first layer of a second dielectric material having a dielectric constant less than the first dielectric constant overlaying the body, a second conductive layer overlaying the second dielectric material which acts as a second conductive plate of a capacitor, and a third layer of a dielectric material having a dielectric constant less than the first dielectric constant overlaying the conductive layer.

REFERENCES:
patent: 3783196 (1974-01-01), Stanley
patent: 3842194 (1974-10-01), Clemens
patent: 3872241 (1975-03-01), Adler et al.
patent: 3930117 (1975-12-01), Clemens et al.
patent: 4013830 (1977-03-01), Pinch et al.
patent: 4052738 (1977-10-01), Hosomi et al.
patent: 4162510 (1979-07-01), Keizer
patent: 4282268 (1981-07-01), Priestley et al.

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