Society of Glass Technology · [Sheffield] · leaf 697
held inline with the opening, 6, of themain stem, by the guide, 7. Thewires, C, cut to length, are drop-ped through the glass stem, A,and are inserted into each of theperforations, 8, in the guide, 7,which supports them upright andparallel in proper spaced relation-ship. The lower ends of the… … 369. Manufacturing Self-luminous Devices. R. W. Erdleand The Cold Light Manufacturing Co. (U.S.A. Pat., No.1410741, March 28th, 1922. Filed May 16th, 1918, No. 234849).—Small self-luminous elements are made by sealing a radioactivemixture, such as is used on the hands of watches, in sections…
Glass
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