Society of Glass Technology · [Sheffield] · leaf 486
Fig. 62. … the edges of lenses comprises a bevel-edged grinding-disk, 1, on ashaft, 7, and a swivel head, 21, pulled towards the disk by a spring,25. The head, 21, is mounted between collars on a spindle, 17, 86 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. which is reciprocated by means of a cam, 18*, engaging…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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