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D27,678 · Ewen · "Design for a Prism-Light" · Page 1
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D27,678: 1 of 2

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Patents: 375 of 511
UNITED STATES PATENT OFFICE
JOHN MEIGGS EWEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO
THE LUXFER PRISM PATENTS COMPANY, OF SAME PLACE.

DESIGN FOR A PRISM-LIGHT.
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John M. Ewen
14 of 21

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Luxfer: 30 of 88

Specification forming part of Design No. 27,678, dated September 21, 1897.
Application filed August 5, 1897. Serial No. 647,266. Term of patent 14 years.
To all whom it may concern:
    Be it known that I, JOHN MEIGGS 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-Lights, of which the following is a specification.
    My invention relates to designs for prism-lights, and is illustrated in the accompanying drawings, wherein--.
    Figure 1 is a perspective view of a prism-light embodying my design. Fig. 2 is a section therethrough.
    Like letters indicate like parts in the two figures.
    The prism-light A consists of a body of glass or the like bounded by the straight edge B and two curved edges C in the form of compound curves. One surface of the prism-light
is substantially smooth or plain, the other side being provided with a series of prisms extending across the light.
    I have shown certain angles, arrangements, and numbers of the prisms, but the essential feature of my invention is a body of glass having one straight edge and two curved edges, the curved edges being in the form of compound curves, the glass being provided on one side with a series of prisms extending thereacross.
    I claim--
    A design for a prism-light as herein shown and described.
JOHN MEIGGS EWEN.
Witnesses:
    DONALD M. CARTER,
    HOMER L. KRAFT