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586,219 · Basquin · "Prism-Light" · Page 2 Home > Prism Glass > Patent Index > Page 2 |
 586,219: 2 of 3 |
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Up: Patent Index |
586,219 · Basquin · "Prism-Light" · Page 2 Home > Prism Glass > Patent Index > Page 2 |
586,219: 2 of 3 |
|
from the removal of that portion of the prism beyond the dotted line
H5 without suffering the evil results which would flow from
its mere removal by providing the secondary prisms, substantially as
shown, along the line of such removal; and this is the substance of
my invention. What I claim is— A prism-light having a plane surface on one side and a prism-surface on the other, such prism-surface composed of a series of primary prisms each having one plane surface and a |
prism-surface, such prism-surface on the primary prism being itself formed
into secondary prisms each having a face at right angles to the plane
surface of the prism-light, and a face parallel to the plane surface of
the primary prism. In testimony whereof I have hereunto signed my name.
FRANCIS W. PARKER, A. R. APPLEMAN, Jr. |