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Patents: 329 of 511
UNITED STATES PATENT OFFICE.
JAMES G. PENNYCUICK, OF TORONTO, CANADA.

DESIGN FOR A PRISM-PLATE.
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James G. Pennycuick
11 of 12

SPECIFICATION forming part of Design No. 27,342, dated July 13, 1897.
Application filed June 15, 1897. Serial No. 640,929. Term of patent 14 years.
To all whom it may concern:
    Be it known that I, JAMES G. PENNYCUICK, citizen of the Dominion of Canada, residing at Toronto, in the county of York and Province of Ontario, Canada, have invented and produced a certain new and useful Design for Prism-Plates, of which the following is a description.
    My invention relates to designs for prism-plates.
    It is illustrated in the accompanying drawings, wherein--
    Figure 1 is a perspective view of my improved design. Fig. 2 is a section therethrough.
    Like parts are indicated by the same letter in both the figures.
    A is a body of glass; B B, a series of prisms thereon. The body of glass has a substantially
plain or smooth surface on one side, with a series of prisms on the other side. The body of glass is triangular approximately in the shape of a right-angle triangle, and the prisms are arranged substantially vertical to the hypotenuse.
    I have shown certain angles, arrangements, and numbers of the prisms; but the essential feature of my invention is a triangular body of glass with one practically smooth side and one prism side, the prisms arranged vertically to the hypotenuse.
    I claim--
    The design for a prism-plate substantially as shown and described.
JAMES G. PENNYCUICK.
Witnesses:
    LOUIE HARDING,
    F. N. BARRETT.