USD28010S - Design for a prism-plate - Google Patents

Description

DPS-Q09 DESIGN.

F. L. WRIGHT.

PRISM PLATE.

No. 28,010 Patented Dec. '7, 1897.

nmmmumu lnuenio r v1 1 Aiomcy W71. ass as:

83M 9. @JMXL UNITED STATES PATENT OFFICE.

FRANK L. VVRIGIIT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE LUXFER PRISM PATENTS COMPANY, OF SAME PLACE.

DESIGN FOR A PRISM-PLATE.

SPECIFICATION forming part of Design No. 28,010, dated December '7, 1897.

Application filed October 23, 1397. Serial No. 656,235. 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 Chicage, 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 prisinplates.

Figure l is a plan view of a prism-plate embodying my design. Fig. 2 is a cross-section therethrough with parts broken away and enlarged.

Ais the body of a prism-plate; B B, a series of surface areas on one side thereof formed by the lines of separation O C.

D D are a series of prisms on one side of the plate, and E E are prisms on certain of the surface areas grouped so as to form a sort of ring or hollow square intermediate between the center and an outer edge of the prismplate.

The essential features of my invention are found in the prism-plate, comprising a substantially flat extended body with a series of lines of separation on one side to divide the surface into a series of substantially uniform surface areas, a series of prisms on the other side, and prisms on certain of the surface areas arranged in a sort of hollow square intermediate between the center and edge.

I claim-- A design for a prism-plate, substantially as shown and described.

FRANK L. XVRIGIIT.

\Vitnesses:

OLIN II. BASQUIN, G. A. LONGFELLQW.

Images