Grounding circuit for pickup cartridge moving coil

Details Grounding circuit for pickup cartridge moving coil Grounding circuit for pickup cartridge moving coil

1984-08-30

1987-01-13

McElheny, Jr., Donald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

H04R 912, G11B 346

Patent

active

046370099

ABSTRACT:
A pickup cartridge of the moving coil type including a magnetic circuit having, in series, (a) an armature with which the coil is associated, (b) a rear yoke, (c) a magnet, and (d) a front yoke. The improvement constitutes grounding magnetic circuit at a point substantially removed from the armature in the series magnetic circuit, the grounding point being at least as far removed from the armature as the surface of the front yoke. Preferably the grounding point is on the end of the front yoke farthest from the armature.

REFERENCES:
patent: 3963880 (1976-06-01), Ikeda
patent: 4138122 (1979-02-01), Nakatsuka
patent: 4237349 (1980-12-01), Hansen et al.
patent: 4376304 (1983-03-01), Uchida et al.

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