 Up: Patent Index |
D28,009 · Wright · "Design for a Prism-Plate" · Page 1 Home > Prism Glass > Patent Index > Page 1 |
 D28,009: 1 of 2 |
|
Up: Patent Index |
D28,009 · Wright · "Design for a Prism-Plate" · Page 1 Home > Prism Glass > Patent Index > Page 1 |
D28,009: 1 of 2 |
|
Patents: 443 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 33 of 41 Luxfer: 76 of 88 |
|
SPECIFICATION forming part of Design No. 28,009, dated December 7, 1897. Application filed October 23, 1897. Serial No. 656,234. Term of patent 14 years. | ||
|
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 Prism-Plates, of which the following is a description. My invention relates to designs for prism-plates. Figure 1 is a plan view of a prism-plate embodying my design. Fig. 2 is a cross-section therethrough on line 2 2. A is the body of the prism-plate; B B, a series of surface areas substantially uniform produced by the lines of separation C C. D D are prisms on one side of the prism-plate, and E E prisms on the other side of the prism-plate and produced upon a series of the |
surface areas about or near the edge of the prism-plate, so as to form a
sort of border. The essential features of my design are found in a prism-plate comprising a substantially flat extended body with prisms on one side, lines of separation on the other side, which divide the surfaces into a series of substantially uniform surface areas, and prisms on such surface areas about or near the edge, so as to form a sort of border. I claim-- A design for a prism-plate, substantially as shown and described.
Witnesses: |