Shure Brothers Incorporated

Frank J Karlov

Lawrence R Happ

Allen R Groh

A magnetic stereo phonograph pick-up cartridge is disclosed. An elongated stylus and an attached permanent magnet are resiliently supported by a molded rubber bearing block which surrounds the magnet and engages under compression with the inner side-walls of a stylus housing sleeve. The molded block is shaped to also serve as a cantilevered inertial damping member which is held in mechanical contact with the magnet. The bearing portion of the block is fabricated from a first material exhibiting high compliance and the inertial damping portion of the block is fabricated from a second material exhibiting high damping characteristics, especially in the high audio frequency range.

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Park Ridge, IL, United States of America

Frank J Karlov