Society of Glass Technology · [Sheffield] · leaf 457
is drawninto the ring mould of thepreliminary mould 12 by suctionproduced by means of a hand-operated piston 8x working in astationary cylinder 8, and inwhich the blowing in the pre-liminary and finishing moulds iseffected by compressed air sup-plied thereto from a source in-dependent of the… … Fir,. 2i). MACHINERY FOR THE WORKING OF GLASS. 79 on the shaft 7 of the hand lever 19 which operates the inston Sx.The spiral spring 1 is mounted on the plunger between a collar 3and a stationary guide bracket 4, and the lever 6 works in a slot5 in the lower portion of the plunger and engages an…
Glass
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