Pivoted arm control arrangements

Details Pivoted arm control arrangements Pivoted arm control arrangements

1975-04-24

1977-05-10

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Combined with diverse-type art device

274 1R, 274 23R, 335180, H01F 700, G11B 310

Patent

active

040231305

ABSTRACT:
The vertical movement of a phonograph pick-up arm is controlled magnetically or electro-magnetically by means including a body of magnetic material attached to the arm and magnetic field producing means arranged to exert a force on the body.

REFERENCES:
patent: 3221120 (1965-11-01), Mooney et al.
patent: 3623734 (1971-11-01), Sakamoto et al.
patent: 3775714 (1973-11-01), Heuer
patent: 3830505 (1974-08-01), Rabinow

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