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D28,013 · Wright · "Design for a Prism-Plate" · Page 1 Home  > Prism Glass  > Patent Index  > Page 1

D28,013: 1 of 2

Patents: 447 of 530	UNITED STATES PATENT OFFICE FRANK L. WRIGHT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE LUXFER PRISM PATENTS COMPANY, OF SAME PLACE. DESIGN FOR A PRISM-PLATE.	Frank L. Wright 37 of 41 Luxfer: 80 of 88
SPECIFICATION forming part of Design No. 28,013, dated December 7, 1897. Application filed October 23, 1897. Serial No. 656,238. Term of patent 14 years.

To all whom it may concern:     Be it known that I, FRANK L. WRIGHT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and original Design for Prism-Plates, of which the following is a description.     My invention relates to designs for prism-plates.     Figure 1 is a plan of a prism-plate embodying my design. Fig. 2 is a section therethrough.     A is the body of the prism-plate; B B, a series of surface areas produced on one side of the prism-plate by means of lines of separation C C. D D are a series of prisms on the other side.

E E are prisms on some of the surface areas, arranged in bands across the surface near the top and bottom.     The essential features of my design are found in a prism-plate comprising a substantially flat and extended body with a series of prisms on one side and on the other a series of surface areas formed by lines of separation, and prisms in such surface areas in bands across the surface near the top and bottom.     I claim--     A design for a prism-plate, substantially as shown and described. FRANK L. WRIGHT. Witnesses:     FRANCIS W. PARKER,     C. A. LONGFELLOW.