Pickup cartridge of movable magnet type
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorMasashi Itoh
Life of this patent
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Abstract
A stereo pickup cartridge of a movable magnet type comprising three movable magnets. The magnetic axis of each of the magnets is orthogonal to the cantilever shaft.
Claims8
A pickup cartridge of a movable magnet type comprising a shaft of cantilever provided with a needle point at its tip end and with a magnet holder at its rear end, a movable magnet provided on said magnet holder comprising a movable magnet having a magnetic axis parallel to a vertical axis orthogonal to the shaft of cantilever, and two movable magnets provided on said magnet holder and each having a magnetic axis parallel to a horizontal axis orthogonal to the shaft of cantilever, the movable magnet on said vertical axis side and the movable magnets on said horizontal axis side being magnetized in different magnetizing directions, a means for supporting said magnet holder to allow free angular motion thereof in a vibration system, and a pair of yokes each having generating coils wound therearound and pole pieces magnetically connected thereto, a pair of adjacent movable magnets among the said movable magnets provided on said magnet holder being arranged opposite the corresponding pole pieces of the yoke so as to form a generating portion.
Dependencies are inferred from the claim text.