Phonograph pickup cartridge stylus rod

Details Phonograph pickup cartridge stylus rod Phonograph pickup cartridge stylus rod

1974-05-14

1976-06-08

Aegerter, Richard E.

Undertaking

29197, G11B 302

Patent

active

039617971

ABSTRACT:
A phonograph pickup cartridge for sound reproduction from disc-type phonograph records has a stylus rod which mounts a stylus tip at the forward end and a moving element constructing one portion of a signal generating structure at the rear end, the stylus shoe being constructed of aluminum pipe with a vacuum vapor deposited beryllium layer formed on the periphery of the aluminum pipe, thereby reducing the dynamic mass for the stylus rod system of the cartridge while obtaining a stylus rod of high mechanical integrity.

REFERENCES:
patent: 1162149 (1915-11-01), Eckhardt
patent: 1333965 (1920-03-01), Fahrenwald
patent: 1792494 (1931-02-01), Harrison et al.
patent: 2507188 (1950-05-01), Weathers
patent: 3236956 (1966-02-01), Kantrowitz
patent: 3576955 (1971-05-01), Obata

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