Ortofon Manufacturing A/s

Hisayoshi Nakatsuka

A phonograph pickup comprises the end portion of a cylindrical pole leg and an opposing yoke with an air gap therebetween, and a moving system including a stylus arm and an armature. A pivoting means provides for pivotal mounting of the moving system in the air gap, and comprises a first resilient bearing spaced a first distance from the pivot point for supporting the armature, and a second resilient bearing spaced a second distance (greater than the first distance) from the pivot point for engaging the moving system with a lower pressure than the first resilient bearing.

Pickup

A moving coil pickup of the type having a substantially square magnetic armature mounted in an air gap defined between two opposed pole faces of magnetic members in a magnetic circuit wherein the shape of the pole faces is conformed to the shape of the armature by making at least one end portion of at least one of the magnetic members substantially square in cross-section.

Moving coil pickup having a substantially square magnetic armature

A phonograph pickup having an armature supported by a resilient pad which restores the armature to a neutral position after excursions thereof. A further resilient means is provided, which engages the armature at a greater distance from its fulcrum than does the pad. The additional resilient means is made of a material having good damping characteristics.

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Greve Strand, Denmark

Hisayoshi Nakatsuka