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D28,008 · Wright · "Design for a Prism-Plate" · Page 1 Home > Prism Glass > Patent Index > Page 1 |
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Up: Patent Index |
D28,008 · Wright · "Design for a Prism-Plate" · Page 1 Home > Prism Glass > Patent Index > Page 1 |
D28,008: 1 of 2 |
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Patents: 442 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 32 of 41 Luxfer: 75 of 88 |
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SPECIFICATION forming part of Design No. 28,008, dated December 7, 1897. Application filed October 23, 1897. Serial No. 656,233. Term of patent 14 years. | ||
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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 section. A is the body of the prism-plate; B B, a series of lines of separation on the face thereof, which divide the face into a series of minor and substantially uniform surface areas C C. D D are prisms on the back of said prism-plate, set at a certain angle, and E E other prisms set at a different angle. These latter prisms are scattered about among the first mentioned, so that the first-mentioned prisms form a sort of field and the latter a set of prism areas in such field of a different angle. When viewed from the prism side, it has the appearance of a field of prisms |
of a certain angle with scattered prism areas of a different angle. When
viewed from the plain side, the appearance of the prism-surfaces of different
angular arrangement is such as to present a field of a given appearance with
a series of surface areas scattered through the same having a different
appearance. The essential features of my design are found in a prism-plate substantially flat and extended, divided on one side into a series of surface areas by lines of separation and provided on the other side with a prism surface or field formed of prisms of a certain angle with a number of prism-surfaces scattered about through the field formed of prisms of a different angle. I claim-- A design for a prism-plate, substantially as shown and described.
Witnesses: |