Society of Glass Technology · [Sheffield] · leaf 729
e placed near the sheet to harden the surface before it makescontact with a roller and thus prevent damaging the surface. G. D. 426. Grinding, Polishing, and Burnishing Glass, etc.J. Carril, Newark, N.J., U.S.A. (Brit. Pat., No. 177049, March12th, 1921).—In a machine for grinding, polishing, and… … Fig. 224. varied by raising or lowering the head carrying the discs. Theglass, etc., is carried on a table, 4, which is reciprocated on tracks,6, by rack-and-pinion gearing, 7, 8, driven, through a shaft, 9,worm-gearing, 11, and variable-speed friction gearing, 13, 14, byopen and crossed belts…
Glass
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