Society of Glass Technology · [Sheffield] · leaf 536
was increased by 20 per cent, afterexposure for twelve months. F. W. H. 149. Tank Furnace Construction. H. J. Travis and CorningGlass Works (U.S.A. Pat., No. 1410782, March 28th, 1922.Filed November 19th, 1920, No. 425120).—The bridge of a tankfurnace consists of a refractory cylinder, 16, secured… … Fig. 89. to end and interlocking with one another, a tie rod through thecentre serving to keep the blocks together. A pipe, 21, is passedthrough the bore and is formed with radiating pins, 23, to act assupports for the blocks. Air is blown through the pipe and throughthe space separating it from…
Glass
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