Society of Glass Technology · [Sheffield] · leaf 598
k in positionwhen the table, b, is raised. A spring-supported centring pin, bb,is mounted in the shaft, b1, and the operating handle, i, is securedto the screwed end of the spindle, h1. H. G. C. 290. Machine for Grinding and Polishing Optical Glass. F. Kuhlmann, Rustringen-Wilhelmshaven, Germany…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
