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UNITED STATES PATENT OFFICE.
FRANK C. SOPER, OF CHICAGO, ILLINOIS, ASSIGNOR TO
THE LUXFER PRISM PATENTS COMPANY, OF WEST VIRGINIA.

DESIGN FOR A PRISM-TILE.
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Frank C. Soper
1 of 16

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SPECIFICATION forming part of Design No. 26,865, dated April 6, 1897.
Application filed February 9, 1897. Serial No. 622,667. Term of patent 14 years.
To all whom it may concern:
    Be it known that I, FRANK C. SOPER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Design for Ornamental Prism-Tiles, of which the following is a description.
    My invention relates to a new design for ornamental prism-tiles illustrated in the accompanying drawings, wherein--
    Figure 1 is a perspective view of a prism-tile embodying my design. Fig. 2 is a section.
    Like letters refer to like parts throughout both figures.
    The prism-tile consists of the body portion A, provided with the projecting part B. The
sides C of the projection B are ridged, corrugated, or provided with prisms, as shown, and are preferably inclined with related to each other, the projection B being wider at the lower than at the upper end.
    The essential feature of my design is the projecting part B, having the prism-covered sides C, inclined with relation to each other.
    I claim--
    The design for an ornamental prism-tile comprising a projecting portion with inclined prism-covered sides as shown.
FRANK C. SOPER.
Witnesses:
    DONALD M. CARTER,
    FRANCIS W. PARKER.