Title: Phonograph cartridge with very hard metal ceramic frame

Abstract: A pick up cartridge which comprises a cantilever at the end of which is mounted, a stylus a generating mechanism which is fixed near the supporting point of the cantilever, a pair of yokes which give a magnetic field to the generating mechanism, and a holder which holds the yokes directly and/or indirectly, wherein at least a part of said holder is made of very hard metal ceramic material. Viscoelastic material is also used to reduce harmful vibrations in the cartridge.

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Other info:

Inventors: Iwasawa, Tadashi

Application Number: 948431
Filing Date: 1978-10-04
Publication_date: 1980-08-19
Assignee:
Primary Class(es): 369/139 369/146
Other Classes:
US Patent Ref:

3040136	Jun, 1962	Grado	179/100.
3060281	Oct, 1962	Snepvangers	179/100.
3077521	Feb, 1963	Aherns et al.	179/100.
3297831	Jan, 1967	Stanton	179/100.
3679843	Jul, 1972	Cho	179/100.
3963880	Jun, 1976	Ikeda	179/100.
4124782	Nov, 1978	Schon	179/100.
4145582	Mar, 1979	Nakatsuka	179/100.

Other Refs:
Primary Examiner: Cardillo, Jr., Raymond F.
Assistant Examiner:
Attorney: Frishauf, Holtz, Goodman & Woodward