Bearing arrangement for a record player tonearm

Details Bearing arrangement for a record player tonearm Bearing arrangement for a record player tonearm

1978-05-02

1979-10-09

Phillips, Charles E.

Undertaking

274 23R, G11B 312

Patent

active

041703618

ABSTRACT:
The disclosed arrangement is for a short pickup arm used with a tangential scanning system. The arm is supported on a single jewel thrust bearing and held against sideways tilting by a pair of attracting magnets, one mounted on the arm above the bearing and the other fixed above the first. This permits the arm to move freely in a plane parallel to the record and in a plane perpendicular to the record and tangent to the grooves. The center of gravity of the arm is chosen to be on a line between the bearing point and the stylus point in order to minimize the effects of outside disturbances.

REFERENCES:
patent: 3479038 (1969-11-01), Eisner
patent: 3779563 (1973-12-01), Irisawa
patent: 4065188 (1977-12-01), Ridler et al.

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