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D27,346 · Ewen · "Design for a Prism-Plate" · Page 1
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D27,346: 1 of 2

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Patents: 333 of 511
UNITED STATES PATENT OFFICE
JOHN M. EWEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO
THE LUXFER PRISM PATENTS COMPANY, OF SAME PLACE.

DESIGN FOR A PRISM-PLATE.
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John M. Ewen
10 of 21

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Luxfer: 26 of 88

SPECIFICATION forming part of Design No. 27,346, dated July 13, 1897.
Application filed June 15, 1897. Serial No. 640,936. Term of patent 14 years.
To all whom it may concern:
    Be it known that I, JOHN M. EWEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented and produced a new and original Ornamental Design for Prism-Plates, of which the following is a specification.
    My invention relates to a new design for a prism-plate, and is illustrated in the accompanying drawing, wherein is shown an elevation of a prim-plate containing my design.
    The prism-lights are provided each with a series of prisms B B, and each of the central lights C C is hexagon-shaped. The side, top, and bottom sections are pieces derived from cutting up the hexagons and are shaped as shown. These several prism-lights are
arranged together in a plate by means of the zigzag-shaped opaque frame-pieces E and the short cross-pieces F.
    The essential features of my design are found in a prism-plate consisting of a series of hexagon-shaped prism-lights and shaped as shown, having each on one side a series of prisms, and a frame composed of zigzag and short pieces, as shown.
    I claim--
    The design for a prism-plate substantially as shown and described.
JOHN M. EWEN.
Witnesses:
    DONALD M. CARTER,
    HOMER L. KRAFT