Society of Glass Technology · [Sheffield] · leaf 738
39 & 53 ^ Fig. 228. ing motions, while the groove, 35, controls the lateral swingingmovements. The punty is rotated by means of the manipulatorrod, 23, which is feathered within a tubular sleeve, 46, mountedfor rotation in a supporting bracket, 47. The sleeve, 46, serves as … Fig. 229. 256 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. a universal support arranged to swing about two axes at rightangles to each other. The point at which these axes intersect liesin the axis of the punty rod, and about this, as centre, the puntyhas universal movement. Fig. 229 shows…
Glass
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