Moving coil pickup cartridge

Details Moving coil pickup cartridge Moving coil pickup cartridge

1980-01-07

1982-02-23

Moffitt, James W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

369145, H04R 904, H04R 916

Patent

active

043171915

ABSTRACT:
In a moving coil pickup cartridge of a stereophonic type having a magnetic circuit consisting of a permanent magnet, a plate and a yoke, left and right air gaps formed in the magnetic circuit, and left and right pickup coils disposed in the air gaps, respectively, the cartridge including left and right pole pieces formed in the magnetic circuit for providing cone-shape magnetic fluxes on each of the air gaps so as to cross the left and right pickup coils. respectively. Stylus exchanging mechanism is also disclosed.

REFERENCES:
patent: 3766330 (1973-10-01), Hepp et al.
patent: 3963880 (1976-06-01), Ikeda
patent: 4090039 (1978-05-01), Mori et al.
patent: 4145582 (1979-05-01), Nakatsuka

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