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Patents: 437 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
27 of 41

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Luxfer: 70 of 88

SPECIFICATION forming part of Design No. 28,003, dated December 7, 1897.
Application filed October 23, 1897. Serial No. 656,227. 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 designs for prism-plates.
    Figure 1 is a plan view of a prism-plate embodying my design. Fig. 2 is a cross-section therethrough.
    A A are surface areas comparatively uniform and formed by the lines of separation B B on the surface of the prism-plate. C C are prisms on the opposite side.
    D D are lines which constitute designs along a band of lower areas, E E lines which form designs along an upper band of areas, and F F lines which constitute designs upon intermediate areas. The designs on intermediate areas are arranged so as to form a distinct and separate pattern or design on each
such area, such patterns or designs being uniform. The result, as indicated, is a distinctly-ornamented bar or band across the upper part and another bar or band across the lower part, with a field ornamented by uniform ornaments, giving a sort of mosaic effect.
    The essential feature of my invention is found in a prism-plate comprising an extended body with prisms on one side, lines of separation which divide the other surface into a series of areas, and a band of such areas distinctly ornamented across the top and another across the bottom, with a field of surface areas uniformly ornamented and distinguished from the band.
    I claim--
    A design for a prism-plate, substantially as shown and described.
FRANK L. WRIGHT.
Witnesses:
    OLIN H. BASQUIN,
    FRANCIS W. PARKER.