Home Index Site Map Up: Patent Index Navigation
Up: Patent Index
D34,458 · Dobbins · "Design for a Prism-Plate" · Page 1
Home  > Prism Glass  > Patent Index  > Page 1
First: D34,458 · Dobbins · "Design for a Prism-Plate" · Page 1 Last: D34,458 · Dobbins · "Design for a Prism-Plate" · Drawing Prev: D34,458 · Dobbins · "Design for a Prism-Plate" · Drawing Next: D34,458 · Dobbins · "Design for a Prism-Plate" · Drawing Navigation
D34,458: 1 of 2

First: 232 · Wyndus · "Glasses and Lamps for Ships, Mines, &c" · Page 1 Last: 397,371 · Deutsche Glasbau-Gesellschaft · "Improvements in Moulds for use in the Construction of Floor Slabs, Wall Panels, Pavement Lights, Windows and the like of Glass Framed in Ferroconcrete" · Drawing Prev: 665,170 · Brown · "Prism Plate" · Page 1 Next: D34,696 · Marcus · "Design for a Prismatic Glass Light" · Page 1 Navigation
Patents: 509 of 530
UNITED STATES PATENT OFFICE.
EDWARD J. DOBBINS, OF NESHAMINY, PENNSYLVANIA, ASSIGNOR TO THE
AMERICAN PRIMATIC LIGHT COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

DESIGN FOR A PRISM-PLATE.
First: 637,145 · Moffat & Dobbins · "Light-Projecting Glass" · Page 1 Last: D39,666 · Dobbins · "Design for a Prism-Plate" · Drawing Prev: 71590 · Moffat & Dobbins · "Improvements in Light Projecting Glasses" · Page 1 Next: FR336475 · Dobbins · "Verres distributeurs de lumière pour fenêtres" · Page 1 Navigation
Dobbins: 5 of 9

SPECIFICATION forming part of Design No. 34,458, dated April 30, 1901.
Application filed April 3, 1900. Serial No. 11,385. Term of patent 7 years.
To all whom it may concern:
Be it known that I, EDWARD J. DOBBINS, a citizen of the United States, residing at Neshaminy, Bucks county, Pennsylvania, have invented and produced a new and useful Design for Prism-Plates, of which the following is a specification.
Figure 1 is a plan view of a prism plate embodying my new design.
Figure 2 is a sectional elevation taken on the line 2 2 of Figure 1.
Figure 3 is a sectional elevation taken on the line 3 3 of Figure 1.
As shown in the drawings, the leading or material feature of my design consists in a series of parallel prismatic ribs on one side of the plate, and a second or independent series of parallel prismatic ribs formed on the other side of the plate, the ribs on one side of the plate extending across, or, so to speak, transversely with respect to, the ribs on the other side of the plate.
The ribs on one side of the plate a, to-wit, those designated b, are of approximately A-shaped section.
The ribs c, on the other side of the plate, have concave side faces, the surfaces of the longitudinally-extending concave spaces between the apices of adjacent ribs being in section in the form of arcs of circles.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, is—
The design for a prism plate, as herein shown and described.
In testimony that I claim the foregoing as my invention I have hereunto signed my name this 31st day of March, A.D. 1900.
EDWARD J. DOBBINS.
In presence of—
G. A. SCHWAB,
F. NORMAN DINON.