Society of Glass Technology · [Sheffield] · leaf 553
s, 6 and 7, fixed attheir inner ends to the cylinder, 1, and provided with thumb-screws, 9.A spring, 10, is coiled about the screw, 7, in such a way as to holdthe two cutting-discs, 14, which are mounted in one of the legs, 3,in yielding contact with the glass tube. In use, the glass is passed… … adjusted against the glass tube by means of the spring, 11. Thecutter is then revolved round the glass tube until the cut is sufficientlydeep to allow of the tube being broken with a smooth edge. S. E. 219. A Double Vacuum Bottle. C. F. P. Anders, Urbana,Illinois, Assignor to E. U. Greenewald,…
Glass
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