C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/9.2
C03B 37/09 (2006.01)
Patent
CA 1121601
IMPROVED FIBER FORMING BUSHING CONSTRUCTION Abstract of the Disclosure In apparatus for heat-softening and attenuating glass material into fibers, an improved low temperature electrical resistance bushing having extremely thin side walls and other electricity conducting components running from end to end in the bushing, relative to the base plate for both direct and marble- melt bushings. The thin side walls enable a low temperature bushing to operate with temperatures less than 2250° F., because the thin side walls draw proportionately less current than the base plate. Additional improvements for providing a low tem- perature bushing include, for a marble-melt bushing, a funnel which is mounted on the top wall and a cooling tube mounted adjacent a bottom portion of the funnel. Another improvement includes the use of auxiliary end plates mounted adjacent the end walls of the bushing for channeling electrical current to the base plate. A further improvement in a marble-melt bushing includes the provision of opposed side walls which are inclined outwardly as well as extend upwardly from the base plate. Upper side wall sections are inclined inwardly from an associated side wall. The result is a construction in which a bridge of glass material may be supported somewhat by the side walls.
323715
Byrnes Gregory W.
Ralls Richard E.
Fetherstonhaugh & Co.
Greickor Company (the)
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