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D27,996: 1 of 2

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Patents: 430 of 511
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.
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Frank L. Wright
20 of 41

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Luxfer: 63 of 88

SPECIFICATION forming part of Design No. 27,996, dated December 7, 1897.
Application filed October 21, 1897. Serial No. 655,973. 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 on line 2 2.
    A is the body of the plate; B B, a series of surface areas thereon formed by the lines of separation C C. The surface areas are substantially uniform. D D are lines produced upon such surface areas, so as to form on a group of central surface areas a central design, as is shown.
    The essential features of my design are found in a prism-plate comprising a substantially flat extended body with prisms on one side and lines of separation on the other which divide such surface areas and a pattern produced upon a group of such surface areas near the center of the plate, so as to give the appearance of an ornamented center with a surrounding field.
    I claim--
    A design for a prism-plate, substantially as shown and described.
FRANK L. WRIGHT.
Witnesses:
    C. A. LONGFELLOW,
    FRANCIS W. PARKER.