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D28,010 · Wright · "Design for a Prism-Plate" · Page 1 Home  > Prism Glass  > Patent Index  > Page 1

D28,010: 1 of 2

Patents: 444 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 34 of 41 Luxfer: 77 of 88
SPECIFICATION forming part of Design No. 28,010, dated December 7, 1897. Application filed October 23, 1897. Serial No. 656,235. 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 view of a prism-plate embodying my design. Fig. 2 is a cross-section therethrough with parts broken away and enlarged.     A is the body of the prism-plate; B B, a series of surface areas on one side thereof formed by the lines of separation C C.     D D are a series of prisms on one side of the plate, and E E are prisms on certain of the surface areas grouped so as to form a sort of

ring or hollow square intermediate between the center and an outer edge of the prism-plate.     The essential features of my invention are found in a prism-plate, comprising a substantially flat extended body with a series of lines of separation on the other side to divide the surface into a series of substantially uniform surface areas, a series of prisms on the other side, and prisms on certain of the surface areas arranged in a sort of hollow square intermediate between the center and edge.     I claim--     A design for a prism-plate, substantially as shown and described. FRANK L. WRIGHT. Witnesses:     OLIN H. BASQUIN,     C. A. LONGFELLOW.