Direct drive for turntables

Details Direct drive for turntables Direct drive for turntables

1975-10-14

1978-02-07

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 74, 274 1E, H02K 128

Patent

active

040728749

ABSTRACT:
An improved direct drive for turntables having a disk-shaped armature integrally coupled to the turntable and concentrically arranged about the shaft of the turntable for causing rotation of the turntable during the application of current to the disk-shaped armature. Advantageously, when such an arrangement is used with audio turntables a disk changer mechanism can be readily accommodated in the turntable.

REFERENCES:
patent: 2970238 (1961-01-01), Swiggett
patent: 3225233 (1965-12-01), Kirilouckas
patent: 3231807 (1966-01-01), Willis
patent: 3303371 (1967-02-01), Moressey et al.
patent: 3512025 (1970-05-01), Quellet
patent: 3520460 (1970-07-01), Lear
patent: 3784853 (1974-01-01), Wangsness
patent: 3786288 (1974-01-01), Joannou
patent: 3909643 (1975-09-01), Kishima
patent: 3988024 (1976-10-01), Watanabe et al.

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