METHOD FOR MANUFACTURING DIALS FOR WATCHES AND DIALS FOR WATCHES MANUFACTURED ACCORDING TO SAID METHOD

A glass watch dial is formed from a moldable glass batch comprising a mixture of glass-forming oxides, intermediate oxides, network-modifying oxides, and a devitrifying agent such as a metal oxide or a metal in colloidal dispersion, which is melted, and to which then is added a metal oxide capable o...

Full description

Saved in:
Bibliographic Details
Main Authors SIMON VERMOT A,CH, HOFER E,CH
Format Patent
LanguageEnglish
Published 26.02.1974
Subjects
APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING ORMAINTAINING CLOCKS OR WATCHES
HOROLOGY
MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL
MECHANICALLY-DRIVEN CLOCKS OR WATCHES
PHYSICS
TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
Online AccessGet full text

Cover

More Information
Summary:A glass watch dial is formed from a moldable glass batch comprising a mixture of glass-forming oxides, intermediate oxides, network-modifying oxides, and a devitrifying agent such as a metal oxide or a metal in colloidal dispersion, which is melted, and to which then is added a metal oxide capable of forming colored crystal nuclei of a synthetic mineral in the presence of the devitrifying agent, then the mass is cooled, the batch is molded to a dial and held at elevated temperature above its annealing point to permit the growth of crystallites from various minerals into the glass matrix to form a mineral similar in aspect, chemical composition and crystal structure to a semiprecious stone.
Bibliography:Application Number: USD3793824