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586,258 · Winslow · "Prism-Light and Prism-Plate" · Page 3 Home  > Prism Glass  > Patent Index  > Page 3

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surface on the plane side of the prism-light, then grinding said excessively-elevated surfaces to a uniformity with the established surface, then uniting the series of said prism-lights in a prism-plate with intermediate metallic portions then bringing the surface of said metallic portions to a uniformity with the established surface of the

prism-lights and thus producing a prism-plate having a smooth unbroken surface on its plane side of glass and metal. WILLIAM H. WINSLOW. Witnesses:     EDWARD C. WALLER,     HENRY WALLER.