Society of Glass Technology · [Sheffield] · leaf 649
around the end of theforehearth, 10, and is filledwith non-conducting material,13. A crossbar, 18, extendsacross the under-side of the casing, 11, and a lever, 23, is looselypivoted on this crossbar. A cup, 22, is fixed to one end of thelever, and a weight, 25, is fixed to the other end. The cup… … r26 MACHINERY FOR THE WORKING OF GLASS. 249 the shape of the glass within or beneath the outlet, and owing toits heat-insulating property, it prevents the glass in the outlet fromfreezing. Thus, when the cup is removed, the hot glass commencesto flow at once and the time usually required to melt…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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