Society of Glass Technology · [Sheffield] · leaf 657
ins to form the apertures, and in so construct-ing this plug that when it is lifted from the moixld body, the pinsare withdrawn from the glass before the plug begins to moveupwards. The stem, 1, of the plug has a flange, 2, formed on itslower end, to which a disk, 3, is secured. Pins, 5, pass… … Fio. 168. tures, 10, through which the pins, 5, slide. A retaining ring, 13,prevents the disk, 3, from being lifted out of the plug, but permitsthem to move relatively to one another, a spacing washer, 12, beingseated in the lower part of the recess to regulate the amount ofthe relative movement.…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
