An Improvement in Concentrating Shades for Spectacles or Eye Glasses.
Year: 1891

page_text: Date of Application, 17th Mar., 1891-Accepted, 9th May,
1891
COMPLETE SPECIFICATION.
An Improvement in Concentrating Shades for Spectacles or
Eye Glasses.
We, JOHN FRANKLIN STRANGE, of 184 County Street, New Bedford_Bristol
County, State of Massachusetts, United States of America, Machinist, and JOSHUA
BAKER WINSLOW of 62 Forest Street, New Bedford Bristol County State of
Massachusetts United States of America, Master Mariner, 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 :-
The object of our invention is to provide suitable means for shutting off the side
light from the lenses of spectacles or eye-glasses, so that a clearer image will be
formed in reading, and in the close examination of objects; and our invention
consists in the combination with the lens of an eye glass or spectacles, of a perforated
protuberant shade, which may be either formed with the eye-glass or spectacle
frame, or permanently attached thereto, or be made removable therefrom, as
hereinafter fully set forth.
Fig. 1, represents a back view of a pair of eye glasses provided with our improve-
Dent, the shade being formed in one piece with the frame for the lens.
Fig. 2, represents a top view of the same.
Fig. 3, represents a vertical section taken in the line xx, of Fig. 1.
Fig. 4, represents a top view showing a removable shade.
Fig. 5, represents a side view of the shade removed from the frame.
Fig. 6, represents a vertical section taken in the line xx, of Fig. 4.
In the accompanying drawings, A, A, in Figs. 1 2, and 3, represent the frames
for the lenses of an eye glass, and B the spring which connects the two lens frames,
the said frames being preferably made in protuberant conical form, provided with
a groove a, adapted to receive the edge of the lens D, and with an elongated
perforation b, thus forming at the outer side of the lens a protuberant concentrating
shade e, whereby the light from objects lying outside of the proper field of vision,
will be prevented from entering the eye; thus concentrating the vision upon
a restricted field, whereby a sharper outline and clearer definition will be
secured.
In Figs. 4 and 5, the concentrating shade e, is represented as removable from
the grooved frame which holds the lens D, and in this case we preferably provide
the shade with the attaching ears or hooks c, c, which serve to embrace the opposite
edges of the frame A, as shown in the section Fig. 6.
The concentrating shade e, may be made of metal, hard rubber, or any suitable
material, and the form of the same may be greatly varied without departing from
the spirit of our invention. The perforation 6 is to be elongated inwardly
from a direct line of the axis of the eye, and the inner edge d of the said
perforation is preferably made nearer the surface of the lens B than the
outer edge.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. A spectacle or eye-glass, provided with a protuberant concentrating shade,
having a perforation which is elongated inwardly from the direct line of sight
through the lens, substantially as described.
2. The combination with a pair of eye-glasses or spectacles, of a removably
attached protuberant concentrating shade, provided with a perforation which is
elongated inwardly from the direct line of sight through the lens, substantially as
described.

page_text: 3.—The combination with a pair of eye-glasses or spectacles, of a removably
attached protuberant concentrating shade, provided with an elongated perforation,
the inner edge of which is made nearer the lens than the outer edge, substantially as
described.
4. The removable concentrating shade for spectacles or eye-glasses, made in
conical form, with an elongated perforation, and provided with attaching hooks,
substantially as described.
Dated this Seventeenth day of March 1891
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicants.