[Book]
Publication: Electricity at the Columbian Exhibition
Chicago, IL, United States
p. 177
EMPIRE CHINA WORKS.
INSULATORS.—The exhibit was of highly vitreous hard rubber porcelain insulators and ware for insulating purposes,—insulator knobs, bushings, cleats, circuit breakers, push buttons, cut-out bases, switch bases, buttons or tips for electric lamps, etc. The goods are liquified by subjection to the operation of baking to a snowwhite heat whereby the ware is made non-conductive throughout and becomes the best of hard porcelain whether glazed or unglazed. This porcelain ware was in use in the Exposition in the switches and cut-outs furnished by the Bryant Electric Company of Bridgeport, Connecticut.
