Society of Glass Technology · [Sheffield] · leaf 588
ner vesselis supported at its free end by a coiled spring,5, which holds the inner vessel so< accuratelyin position that it is not necessary to haveany other supports between the walls of thetwo vessels, thus reducing heat conduction toa minimum. The open end of the bottle isclosed by the hollow… … Fig. 84. 143. Drawing Glass Cylinders. James A. Chambers(U.S.A. Pat., July 8th, 1919, No. 1309274. Filed October 8th,1918, No. 257405).—In drawing window-glass cylinders from a tank, it is usual to draw the glassthrough a ring, 9 (Fig. 85), whichfloats on the surface of the metal,and through an…
Glass
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