Moving coil type cartridge mounted on cantilever within central

Details Moving coil type cartridge mounted on cantilever within central Moving coil type cartridge mounted on cantilever within central

1982-08-30

1985-10-15

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

369147, H04R 912, H04R 916

Patent

active

045478740

ABSTRACT:
Herein disclosed is a compact, highly reliable and inexpensive moving coil type cartridge comprising a ring-like magnet which is coaxially disposed with respect to a cantilever having a needle at its free end. A back-up first and a ring-like second auxiliary magnetic members are additionally provided at both sides of the ring magnet to attain the effective utilization of magnetic flux from the ring magnet.

REFERENCES:
patent: 3627931 (1971-12-01), Matsuda
patent: 3956598 (1976-05-01), Kawakami et al.
patent: 4090039 (1978-05-01), Mori et al.
patent: 4161631 (1979-07-01), Matsuda
patent: 4237349 (1980-12-01), Hansen et al.

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