Protection device for basalt drain bushings

Details Protection device for basalt drain bushings Protection device for basalt drain bushings

1984-11-13

1986-01-21

Lindsay, Robert

Glass manufacturing

Processes

Forming product or preform from molten glass

65 1, 65327, C03B 3702

Patent

active

045655596

ABSTRACT:
This invention relates to a method of retarding bushing degradation by glass batch containing iron oxide. The problem is solved by substantially eliminating the passage of current directly through the bushing for heating and employing a conductive heating means to an electrically insulated bushing.

REFERENCES:
patent: 1603221 (1926-10-01), Thomson
patent: 1853843 (1932-04-01), Bates et al.
patent: 2186718 (1940-01-01), Ferguson
patent: 3078695 (1963-02-01), Kozak et al.
patent: 3244495 (1966-04-01), Apple et al.
patent: 3244496 (1966-04-01), Apple et al.
patent: 4213002 (1980-07-01), Pieper
patent: 4402724 (1983-09-01), Weisenburger et al.

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