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595,271 · Soper · "Prism-Light" · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

595,271: 2 of 3

prisms systematically arranged on one side thereof to produce an increased illuminating effect, and a series of comparatively narrow flat-surfaced ridges crossing the prism-grooves on the prism side and having sides substantially perpendicular to the receiving-surface of the prism-light, and outer edges or surfaces substantially flush with the outer

edges of the prisms, and duplicates of said ridges raised on the receiving-surface of the prism-light. FRANK C. SOPER. Witnesses:     DONALD M. CARTER,     HOMER L. KRAFT.