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D28,012 · Wright · "Design for a Prism-Plate" · Page 1 Home  > Prism Glass  > Patent Index  > Page 1

D28,012: 1 of 2

Patents: 446 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 36 of 41 Luxfer: 79 of 88
SPECIFICATION forming part of Design No. 28,012, dated December 7, 1897. Application filed October 23, 1897. Serial No. 656,237. 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 and is illustrated in the accompanying drawings.     Figure 1 is a plan view of a prism-plate embodying my design. Fig. 2 is a cross-section.     A is the body of the prism-plate; B B, a series of surface areas formed thereof by the lines of separation C C. D D are a series of prisms on one side of the plate, and E E prisms on some of the surface areas scattered about over the surface. When viewed from the prism side, there is a uniform prism-surface.

When viewed from the other side, there is a series of surface areas some of which are provided with prisms and other forming a "field," so to speak.     The essential features of my design are found in a prism-plate comprising a substantially flat extended body with a series of prisms on one side and on the other a series of lines of separation which divide the surface into a number of surface areas, and prisms on various of such surface areas.     I claim--     A design for a prism-plate, substantially as shown and described. FRANK L. WRIGHT. Witnesses:     C. A. LONGFELLOW,     OLIN H. BASQUIN.