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D27,990 · Wright · "Design for a Prism-Plate" · Page 1 Home > Prism Glass > Patent Index > Page 1 |
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D27,990 · Wright · "Design for a Prism-Plate" · Page 1 Home > Prism Glass > Patent Index > Page 1 |
D27,990: 1 of 2 |
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Patents: 424 of 530 |
UNITED STATES PATENT OFFICE
FRANK L. WRIGHT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE LUXFER PRISM PATENTS COMPANY, OF SAME PLACE. DESIGN FOR A PRISM-PLATE. |
Frank L. Wright 14 of 41 Luxfer: 57 of 88 |
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SPECIFICATION forming part of Design No. 27,990, dated December 7, 1897. Application filed October 2, 1897. Serial No. 653,864. Term of patent 14 years. | ||
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To all whom it may concern: Be it known that I, FRANK L. WRIGHT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and original Design for a Prism-Plate, of which the following is a specification. My invention relates to designs for prism-plates, and is illustrated in the accompanying drawings. Figure 1 is a plan view of a prism-plate. Fig. 2 is a section therethrough. A is a prism-plate having prisms on one |
size and provided with the circular portion B. The plate consists of a
substantially flat body. The essential features of my design are found in a prism-light comprising a substantially flat prism-plate with the circular part B. I claim-- A design for a prism-plate substantially as shown and described.
Witnesses: |