Society of Glass Technology · [Sheffield] · leaf 562
ocated inside the column, 21, the upper end of which forms afluid chamber, 59, having a port, 63, for each platform, each pro-vided with a depending valve box, 64. Inside each box is a conicalseat, 67, and a ball valve, 68, and each box is connected by a MACHINERY FOR THE WORKING OF GLASS. 1G1… … Fig. 124.adjustable, and normally stationary, member, 71, which covers insuccession the ports, 63, and so cuts off the sand-blast as the articlesarrive at a position where they are to be removed. The valves, 68,are normally held raised by tappet rods, 72, resting on levers, 73, 162 JOURNAL OF THE…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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