USD28012S - Design for a prism-plate - Google Patents

Description

DESIGN.

Patented Dec. 7, 1897.

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"W WW W WWW Wfw WITNESSES INTCEWT R Q, M I W 9 M X Wflfwr .dftorney UNITED STATES PATENT OFFICE.

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

DESlGN FOR A PRISM-PLATE.

SPECIFICATION forming part of Design No. 28,012, dated December 7, 1897.

Application filed October 23, 1897. Serial No, 656,237. Term of patent 14 years.

To all whom it may concern.-

Be it known that I, FRANK L. \VRIGHT, a citizen of the United States, residing at Ohieago, in the county of Cook and State of Illinois, have invented a certain newand original Design for Prism-Plates, of which the f0ll0wing is a description.

My invention relates to designs for prismplates and is illustrated in the accompanying drawings.

Figure 1 is a plan view of a prism-plate embodying my design. Fig. 2 is a cross-section.

A is the body of the prismplate; B B, a series of surface areas formed by the lines of separation O C. D D are a series of prisms on the other side of the plate, and E E prisms on some of the surface areas scattered about over the surface. \Vhen viewed from the prism side, there is a uniform prism-surface.

\Vhen viewed from the other side, there is a series of surface areas some of which are provided with prisms and others forming a field, so to speak.

The essential features of my design are found in a prism-plate comprising a substantially fiat extended body with a series of prisms on one side and on the other a series of lines of separation which divide the surface into a number of surface areas, and prisms on various of such surface areas.

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

FRAN K L. \VRIGIIT.

Witnesses:

A. LoNerELLow, ()LIN II. BASQUIN.

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