Moving coil type stereophonic pickup cartridge

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

1981-06-26

1983-03-08

Faber, Alan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

369147, H04R 916

Patent

active

043763049

ABSTRACT:
In a moving coil type stereophonic pickup cartridge, an armature is provided having first, second, and third leg portions which extend in three directions. A source of magnetic flux is disposed with only one pole thereof adjacent to the first, second and third leg portions of the armature. The magnetic circuits thus constructed, having an open return path, generate signals by changes in the magnetic flux through coils wound on the second and third leg portions due to the movement of the armature relative to the magnetic source. Variations in the design of the three leg armature and the magnetic source are disclosed. Practical embodiments of the invention include disclosure of cartridge replacement features providing convenient electrical connection between moving coils and remainder of the sound reproduction system.

REFERENCES:
patent: 3214525 (1965-10-01), Eyck
patent: 3299219 (1967-01-01), Madsen
patent: 3679843 (1972-07-01), Cho
patent: 3729596 (1973-04-01), Toth
patent: 3761647 (1973-09-01), Nemoto
patent: 4124783 (1978-11-01), Nemoto
patent: 4161631 (1979-07-01), Matsuda
patent: 4209670 (1980-06-01), Ono

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