USD28015S - Design for a prism-plate - Google Patents

Description

D 28,015 DESIGN.

IP. L. WRIGHT.

PRISM PLATE.

No. 28,015. Patented Dec. 7,1897.

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UNITED STATES PATENT OFFICE.

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

DESIGN FOR A PRISM-PLATEA SPECIFICATION forming part of Design No. 28,015, dated December '7, 1897.

Application filed October 23, 1897. Serial No. 656,240. Term of patent 14 years.

To all? whom it may concern/.-

Be it known that I, FRANK L. VRIGHT, n citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented e certain new and original Design for Prism-Plates, of which the following is zt description.

My invention relates to designs for prismplates.

Figure l is a, plan of a prism-plate embodying my design. Fig. 2 is a eross-seeti0n on line 2 2.

A is the body of the plate; B B, a. series of surface areas thereon formed by the lines of separation C C. D D are prisms on the other side of the plete, and E E prisms in the various surface areas on the inst-mentioned side 0f said plate.

The essential features of my design are found in a prism-plate comprising u` substantially fiat extended body with :t series of prisms on one side thereof and u. series of surface areas on the other side, formed by lines 0f separation, and prisms 0n such surface areas.

I claim- A design for a prism-platte, substantially :is shown and described.

FRANK L. 'WRIGHT Witnesses:

C. A. LONGFELLOW, OLIN II. BASQUIN.

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