Improvements in Glass Lights for Windows, Gratings, and the like.
Year: 1899

page_text: Date of Application, 18th Apr., 1899
Complete Specification Left, 17th Jan., 1900-Accepted, 10th Mar., 1900
[Communicated from abroad by SIEGFRIED MARCUs, of 240, South Eighth Street,
Philadelphia, Pennsylvania, United States of America, Manufacturer].
Improvements in Glass Lights for Windows, Gratings, and the like.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
This invention is an improvement in glass lights intended for illuminating
panes or gratings and is designed to more effectively collect the exterior light
rays and disseminate them throughout the room or apartment to be lighted.
The light consists of a plate having one side provided with rounded or concave
corrugations, and the other side provided with a series of parallel projecting
concavo-convex ribs forming a series of parallel prisms having one side concave
and the other convex and meeting in a concavo-convex angle, each concave side
being adjacent to the next convex side and vice versa.
Dated this 18th dor of Annil 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
Improvements in Glass Lights for Windows, Gratings, and the like.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:―
Prism glass for increasing the diffusion of light rays and thus enabling rooms
with limited light area to be more effectively lighted has been extensively used.
In some cases the glass is formed with a series of parallel horizontal prisms on
one face and a plane surface upon the other, in other cases one face is provided
with the prisms and the other face with a series of parallel convex ribs forming
convex lenses. The curved face or lense is effective in producing a divergence
of the emergent rays, and I have found that the most effective diffusion of the
rays can be obtained by making each surface curved or lense shaped.
My improved glass light is composed of a series of parallel prismatic parts
having each face curved or lense shaped, with two of the faces concave and one
convex, such parts being united together into a single unitary piece so as to
Price 8 I

page_text: present a series of parallel concave lenses on one side and a series of parallel
angular concavo-convex ridges on the other.
In the accompanying drawings: Fig. 1 is a perspective view of a glass light
embodying my invention with the face provided with the angular ridges upper-
most, and Fig. 2 is a transverse sectional view of the same in a relatively inverted
position.
The glass light is a single unitary piece and may be made either in tile or sheet
form.
A are the parallel concavo-convex angular ridges upon one face, having the
convex face a and the concave face b, and c are the concave faces on the other
side. The series of ribs are uniformly disposed so that adjacent ribs are united
in a concave-convex angle, and the concave face 6 of one angular rib is adjacent
to the convex face a of the next adjacent rib, with the concave faces c on the
opposite side placed opposite to the concavo-convex ridges.
Having now particularly described and ascertained the nature of the said in-
vention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:-
The glass light substantially as hereinbefore described having a series of
parallel concave lenses on one side and a series of parallel concavo-convex angular
ridges upon the other.
Dated this 17th day of Ionawr 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.