1979-01-02
1980-11-11
Konick, Bernard
17910041K, H04R 916
Patent
active
042334764
ABSTRACT:
A moving coil type of carriage for reproduction of sound on stereo discs in which there are four substantially flat pole faces arranged in square configuration facing mutually inwardly to define a central space and forming first and second opposed pairs. Permanent magnets are provided for magnetizing the first and second pairs so that the opposed pole faces are of the same polarity and adjacent pole faces are of opposite polarity. A first coil in the central space has its axis parallel to the first pair of pole faces with the turns thereof spaced along and lying closely adjacent such pole faces. A second coil in the central space has its axis parallel to the second pair of pole faces with the turns spaced along and lying closely adjacent such pole faces, the coils being secured together to form a square prism with the axes of the coils at right angles to one another. The coils are mounted upon a shank or cantilever of non-magnetic material arranged along a central axis which is substantially perpendicular to both of the coil axes. Finally, means are provided for resiliently supporting the shank so that movements of the stylus in two directions produce axial movements in the respective coils.
REFERENCES:
patent: 3139490 (1964-06-01), Lyons
patent: 3526728 (1970-09-01), Iga
Konick Bernard
McElheny Jr. Donald
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