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UNITED STATES PATENT OFFICE.
OLIN H. BASQUIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO
THE LUXFER PRISM PATENTS COMPANY, OF SAME PLACE.

DESIGN FOR A PRISM-PLATE.
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Olin H. Basquin
8 of 28

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SPECIFICATION forming part of Design No. 27,343, dated July 13, 1897.
Application filed June 15, 1897. Serial No. 640,917. Term of patent 14 years.
To all whom it may concern:
    Be it known that I, OLIN H. BASQUIN, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented and produced a certain new and useful Design for Prism-Plates, of which the following is a description.
    My invention relates to a design for prism-plates.
    It is illustrated in the accompanying drawing, wherein--
    A is a prism-light having thereon a series of prisms B B, the several prism-lights surrounded by a frame C and separated from each other by the inner frame-pieces D D.
    The essential feature of my design for a prism-plate is the representation of several prism-lights assembled together in the form of a prism-plate, separated by opaque strips and provided each with a series of prisms which extend diagonally across such lights, as shown.
    I claim--
    The design for a prism-plate substantially as shown and described.
OLIN H. BASQUIN.
Witnesses:
    DONALD M. CARTER,
    BERTHE C. SIMS.