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UNITED STATES PATENT OFFICE
RANK 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
17 of 41

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Luxfer: 60 of 88

SPECIFICATION forming part of Design No. 27,993, dated December 7, 1897.
Application filed October 20, 1897. Serial No. 655,851. 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 specification.
    My invention relates to a new and original design for prism-plates, and is illustrated in the accompanying drawings, wherein--
    Figure 1 is a view of a prism-plate embodying my invention. Fig. 2 is a section through Fig. 1 on line 2 2.
    A is a prism-plate having on one side the prisms B B and on the other side the lines of separation C C, which separate the surface into a series of distinct areas. D D are patterns
of ornamentation on each of these separate areas, constituting a separate, distinct, and complete design on each of such areas.
    The essential features of my design are found in a prism-plate having prisms on one side and on the other a series of lines of separation which divide the surface of the plate into a series of uniform areas, and a series of complete, distinct, and separate ornamental patterns, one on each such surface area.
    I claim--
    A design for a prism-plate, substantially as shown and described.
FRANK L. WRIGHT.
Witnesses:
    DONALD M. CARTER,
    HOMER L. KRAFT.