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D30,471 · Lubin & Dryfoos · "Design for a Prism-Plate" · Page 1 Home  > Prism Glass  > Patent Index  > Page 1

D30,471: 1 of 2

Patents: 486 of 530	UNITED STATES PATENT OFFICE SIEGMUND LUBIN AND SOLOMON DRYFOOS, PHILADELPHIA, PENNSYLVANIA. DESIGN FOR A PRISM-PLATE.
SPECIFICATION forming part of Design No. 30,471, dated April 4, 1899. Application filed February 21, 1899. Serial No. 706,418. Term of patent 7 years.

To all whom it may concern:     Be it known that we, SIEGMUND LUBIN and SOLOMON DRYFOOS, residing in the city of Philadelphia, State of Pennsylvania, have invented and produced a new and original design for Prism-Plates, of which the following is a specification.     Figure 1 is a plan view of a prism-plate embodying our new design. Fig. 2 is a sectional view taken on the line A A of Fig. 1. Fig. 3 is an end elevation at right angles to the line A A.     As shown in the drawings, the leading or material feature of our design consists of a series of parallel cylindrical concavities 1,

disposed or arranged upon one side of the plate, as shown in Figs. 1 and 2, while the opposite side of the plate comprises a series of parallel prismatic ribs 2, as shown.     Having described our invention, what we claim as new, and desire to secure by Letters Patent, is—     The design for a prism-plate, as herein shown and described. SIEGMUND LUBIN. SOLOMON DRYFOOS. Witnesses:     CHAS. P. ROONEY,     FRANK J. BRADY.