Society of Glass Technology · [Sheffield] · leaf 504
out the same time, the blowpipe is turnedfrom its vertical position by means of the cam, 40, and its associatedmechanism, to the position shown in the centre of Fig. 45. Therotation of the blowpipe on its own axis continues in this positionuntil a roller, 74, rides over a cam, 69, Avhich disengages… … Fig. 45. runs from the end of the cam, 69, the high speed gear, 52, is broughtinto mesh with the rack, 54, by which time the blank hasbeen enclosed in the mould as shown on the left-hand side of Fig. 45.Both low and high speed gears operate through the shaft, 48, andthe gear wheels, 43, 44, 46, and…
Glass
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