Matsushita Electric Industrial Co., Ltd.

Katsuhiko Morita

Hiroshi Yasuda

Shuichi Obata

Masashi Itoh

Akira Kagata

Masatoyo Kubo

A phonograph pickup arm device wherein one end of a balance weight is connected to one end of an arm through a spring, and a first magnet is supported at the other end of the weight and is immersed in a viscous oil. A second magnet is disposed for displacement toward or away from the first magnet for adjusting the magnetic force acting therebetween so that the compliance of the device which is related to the arm resonance frequency, may be changed and consequently the arm resonance amplitude may be substantially reduced.

Pickup arm device dynamically damped

In a stereophonic pickup cartridge which derives two or more than two electric signals from a stereophonic sound recording disk of so-called 45.degree. -- 45.degree. type, there is provided a displacement-type pickup cartridge having an improved vibration transmission structure.

Growing community of inventors

Kyoto, Japan

Katsuhiko Morita