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D27,998: 1 of 2

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Patents: 432 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
22 of 41

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Luxfer: 65 of 88

SPECIFICATION forming part of Design No. 27,998, dated December 7, 1897.
Application filed October 23, 1897. Serial No. 656,226. 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 section therethrough.
    A is the body of the prism-plate.
    B B are a series of surface areas substantially uniform in appearance and produced by the lines of separation C C, which cross the surface of the body of the plate. D D are prisms on the opposite side.
    Upon the surface of the prism-plate and intermediate between its center and outer edge
are a group of areas forming an annulus are ornamented by means of the lines E E. These lines are produced on the surface of the prism-plate.
    The essential features of my design are found in a prism-plate consisting of a substantially flat body with a series of prisms on one side and lines of separation on the other, which divide the surface into a series of substantially uniform surface areas, and an annulus formed on the surface intermediate between the center and the outer edge by means of lines of ornamentation.
    I claim--
    A design for a prism-plate, substantially as shown and described.
FRANK L. WRIGHT.
Witnesses:
    OLIN H. BASQUIN,
    FRANCIS W. PARKER.