Society of Glass Technology · [Sheffield] · leaf 635
down fork rotates with the bulb, it serves to holdit exactly concentric with the stem, and as there is no relativeangular movement between the flared end and the fork, no twistingof the hot neck is caused. In making tipless lamp, the flare has a notch in it, and thisis kept open during the… … Fig. 152. VII.—Fuels, Refractories, and Furnaces. 337. An Improved Gas Producer. C. W. Lummis (U.S.A.Pat. No. 1305913, June 3rd, 1919. Filed January 27th, 1915.No. 4650).—A gas producer constructed of an iron shell with a fire-brick lining has a water-jacket surrounding the hottest zone of…
Glass
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