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Patents: 426 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
16 of 41

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Luxfer: 59 of 88

SPECIFICATION forming part of Design No. 27,992, dated December 7, 1897.
Application filed October 7, 1897. Serial No. 654,467. 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 designs for prism-plates.
    Figure 1 is a plan view of a prism-plate. Fig. 2 is a cross-section therethrough.
    A A are surface areas.
    B B are lines of separation across the face of the prism-plate.
    On one side of the prism-plate is a series of prisms B'. On the other side is a series of ornamental figures C C D D, many of which figures are carried over the lines of separation B B.
    The essential features of my design are found in a substantially flat body having prisms on one side, lines of separation on the other, which divide the prism-plate into separate areas or surfaces, and ornamental figures which are carried from one separate area to the other across the lines of separation, thus producing the appearance of a complete design only when the lines on adjacent areas are considered together.
    I claim--
    A design for a prism-plate, substantially as shown and described.
FRANK L. WRIGHT.
Witnesses:
    DONALD M. CARTER,
    HOMER L. KRAFT.