Society of Glass Technology · [Sheffield] · leaf 674
Fig. 157. 271. Drawing Glass Cylinders. G. L. Catlin and D.Morrison (U.S.A. Pat., February 12th, 1918, No. 1255983.Piled May 19th, 1917, No. 169711).—A drawing-pot consists of a topstone, 11, havinga depending flange orbody, 12, and areversible bottom, 16,L^fl mounted on trunnions, … Fig. 158. .pp> 20. The rim, 18, of the bottom whichmakes - contact withthe flange, 12, is verynarrow in order topermit expansion ofthe rim, 17, and tominimise stickingbetween the topstoneand thei bottom. Thebottom is raised andlowered by means ofworm gear, 33, andthe trunnions, 20, aresupported…
Glass
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