Moving coil type stereophonic pickup cartridge

Details Moving coil type stereophonic pickup cartridge Moving coil type stereophonic pickup cartridge

1979-05-23

1981-06-09

Cook, Daryl W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

369149, H04R 916

Patent

active

042726522

ABSTRACT:
A moving coil type stereophonic pickup cartridge is disclosed wherein a pair of magnetic air gaps are established corresponding to the walls of the sound groove of a 45.degree.-45.degree. stereophonic record and arranged such that the orientation of magnetic flux in the air gaps projects orthogonally to each other. The two magnetic air gaps are arranged on the right and the left of a cantilever fulcrum respectively. A coil is arranged within each of the gaps, each coil having a winding axis generally parallel to the axis direction of the cantilever. Each coil moves within its associated magnetic air gap integrally with the cantilever, thereby developing high output signals.

REFERENCES:
patent: 3294405 (1966-12-01), Pritchard
patent: 3679843 (1972-07-01), Cho
patent: 3729596 (1973-04-01), Toth
patent: 3761647 (1973-09-01), Nemoto
patent: 3878342 (1975-04-01), Madsen
patent: 4124783 (1978-11-01), Nemoto

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