Method for the manufacture of capacitive pickup styli

Details Method for the manufacture of capacitive pickup styli Method for the manufacture of capacitive pickup styli

1980-04-21

1982-02-16

Hall, Carl E.

Metal working

Electric condenser making

Solid dielectric type

295272, 204192SP, 369126, H01G 406

Patent

active

043153585

ABSTRACT:
A method is provided for the manufacture of a capacitive pickup stylus. In the method of this invention an elongated stylus blank is prepared from a hard dielectric material such as diamond. The blank is formed into an elongated bar having substantially symmetrical diagonal cross-sectional halves along the length thereof and having opposing polished surfaces with one of the polished surfaces being on each of the diagonal cross-sectional halves. Thereafter, one of the cross-sectional halves is masked by a jig or the like and the other half which remains exposed is sputter coated with a conductive material. The coated stylus blank is then machined to provide a tip on a terminal end thereof with the coated polished surface positioned as the rearward electrode carrying surface of the stylus.

REFERENCES:
patent: 3325393 (1967-06-01), Darrow et al.
patent: 3826877 (1974-07-01), Leedom et al.
patent: 3842194 (1974-10-01), Clemens
patent: 4013830 (1977-05-01), Pinch et al.
patent: 4052738 (1977-10-01), Hosomi et al.
patent: 4273967 (1981-06-01), Wada et al.

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