Phonograph tonearm pickup counterbalance

Details Phonograph tonearm pickup counterbalance Phonograph tonearm pickup counterbalance

1977-07-26

1978-09-19

Haroian, Harry N.

Undertaking

G11B 310

Patent

active

041148959

ABSTRACT:
A low mass counterbalance assembly is provided for the tonearm of a phonograph. The counterbalance assembly includes a leaf spring and magnet that are attached to the tonearm. The magnet interacts with a second magnet attached to the base of the phonograph thereby affecting the downward tracking force of the tonearm stylus. The leaf spring modulates the interaction of the magnets.

REFERENCES:
patent: 3156472 (1964-11-01), Brock
patent: 3294403 (1966-12-01), Reed et al.
patent: 3503615 (1970-03-01), Matsuda
patent: 3623734 (1971-11-01), Sakamoto
patent: 3771797 (1973-11-01), Braun
patent: 3830505 (1974-08-01), Rabinow
patent: 4023130 (1977-05-01), Ridler

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