Ornamental part for watches and method of producing the same

Details Ornamental part for watches and method of producing the same Ornamental part for watches and method of producing the same

1978-09-25

1980-10-07

Newsome, John H.

Horology: time measuring systems or devices

Cases

With ornamentation

204192N, 427 38, 428627, 428927, G04B 3700, B05D 306

Patent

active

042260825

ABSTRACT:
An ornamental part for watches such as a watch case having a composite coating layer consisting essentially of titanium and titanium nitride, the ratio of the two components being varied in the direction of the thickness of the layer. The composite coating may be formed by the physical vapor deposition method in which the titanium in the vapor phase is reacted with nitrogen under a glow-discharge condition. The coating thus formed has a gold color and excellent physical and chemical properties.

REFERENCES:
patent: 1904241 (1933-04-01), Kammerer
patent: 3108900 (1963-10-01), Papp
patent: 3669695 (1972-06-01), Iler et al.
patent: 3684463 (1972-08-01), Koelbl
patent: 3690062 (1972-09-01), Kasai et al.
patent: 3772058 (1973-11-01), Bloom
patent: 3813227 (1974-05-01), Tomita et al.
patent: 3841848 (1974-10-01), Kasai et al.
patent: 3900592 (1975-08-01), Kennedy et al.
patent: 3953178 (1976-04-01), Engel

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