Pickup arm suspension for video disc cartridge

A video disc pickup cartridge for supporting a signal pickup stylus comprising:

• first and second sidewalls spaced apart by a topwall to form a generally rectangular enclosure with its long sides defined by said sidewalls;
• a tubular stylus arm having said pickup stylus secured to a first end, and having a second end;
• a generally long, narrow, flat suspension made of compliant material secured at a first end thereof only to said cartridge top wall, said suspension hanging therefrom within the confines of said enclosure;
• means for securing the second end of said stylus arm to a second end of said suspension;
• a longitudinal permanent magnet having poles along its longitudinal axis, said magnet being of substantially uniform width and thickness and wherein said magnet is mounted to the stylus arm nearer its second than its first end and generally perpendicularly disposed in a plane formed by the intersection of the stylus arm and the long axis of said suspension, and wherein the mass of the magnet is proportioned about the center of the stylus arm to effect torsional tuning thereof.