Improvements in Spectacles and Eye-protectors.
Year: 1893

page_text: Date of Application, 31st July, 1893
'Complete Specification Left, 30th Nov., 1893-Accepted, 13th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Spectacles and Eye-protectors.
ROBERT PURDOM 126 Great Tindal Street Birmingham, Spectacle Maker, and
HENRY STOKES 126 Great Tindal Street Spectacle Maker do hereby declare the
nature of this invention to be as follows:-
An improvement in gauze cups for spectacles and eye-protectors, and in gauzes
for Deye spectacles, as they are at present made, by the addition of metal supports
connecting the upper and lower rims or framework forming the binding of the
gauze cups and D shaped gauzes, the said metal supports may be cupped or raised
to give them additional strength. We claim that these supports connecting the
upper and lower rims or framework of the gauze cups and D shaped gauzes, are a
distinct and advantageous improvement to the gauze cups and D shaped gauzes as
now made, as they impart much greater strength to the framework of the gauze
cups and D shaped gauzes, and almost totally remove their liability to collapse or
get misshapen through accident or rough usage. Also when the gauze cups are
made to fold over in the spectacle frames, and when so folded overlap to some
extent, the gauze portion is protected from injury and relieved from pressure by
the metal supports, as the métal rim of the topmost gauze cup rests on the metal
support of the lower one.
Dated this 29th day of July 1893.
ROBERT PURDOM.
HENRY STOKES.
Improvements in Spectacles and Eye-protectors.
We, ROBERT PURDOM and HENRY STOKES, trading as Purdom and Stokes,
of Great Tindall Street, in the City of Birmingham, Manufacturers, 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:-
Our invention relates to improvements in the gauzed frames of spectacles and
eye glasses, known in commerce as gauze cups and D-gauzes.
Now our invention has for its object, the strengthening of the frames or the
skeleton frames forming the boundary edgings to the gauze bodies constituting the
protecting medium, and this we accomplish by providing the said frames with a
lateral support or supports which sustain the said frames, against undue pressure
which would otherwise change the figure of both frame and gauze, and possibly end
in the same collapsing.
Figure 1 of the accompanying drawing represents an edge view of a pair of
spectacles or eye-protectors provided with non-collapsible gauze cups made
according to one form of our invention.
Figure 2 represents a back elevation of one of the gauze cups upon an enlarged
scale.
Figure 3 is a vertical section upon the dotted lines A B Figure 2, showing the
cross stay or support uniting the middle part of the upper frame to the middle
part of the lower frame by a paragon rib, stay, bar or support which constitutes
the means of preventing injury to both the frame and support.
Figure 4 represents a cross section upon the dotted lines CD Figure 2.

page_text: In Figures 1 to 4, a is spectacle frame having rims a', with folding gauze cups b,
hinged to them, so as to admit of the said cups folding inwards in order to render
the same more portable or compact when not in use. These gauze cups consist of
body gauzes, surrounded or encompassed by a sheet metal border edging 6, made
preferably of a trough figure, and with the boundary edges of the gauze encom-
passed by or clamped between the sides of the said trough metal, and with the
middle of the front part 3, united to the middle of the rear part by a cross
concaved support, stay or cross rib b³.
Instead of employing one support, stay or rib, two may he employed.
We propose to make both the boundary edging or border and the stay or rib by
cutting the same out from a single blank of thin sheet metal, or the said support or
rib may be made separate from the boundary frame, and be attached thereto at its
ends, by soldering, rivetting or otherwise.
We prefer to longitudinally concave or trough the said support in order to give
additional cross strength combined with lightness to the same.
Figure 5 represents a cross section of a gauze cup whose support or rib has
three longitudinal trouglis or corrugations which gives additional strength and
better appearance by taking away the bareness of a single convexed support.
Figure 6 represents a D gauze or D-shaped frame filled in with gauze or having
gauze insertions, and being provided with a cross support, rib or stay, which may
be plain or troughed, channelled or ribbed to give additional strength thereto.
Figure 7 is a cross section of Figure 6 upon the dotted lines E F.
The application of our invention to other gauzes or frames with gauze insertions
differs in no essential respect from its application to the forms described and
represented.
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 :-
First. In gauze-cups and D or other shaped gauzes for spectacles and eye-
protectors, employing in connection with or in addition to, the frames, rims or
boundary edgings of the same, a supplementary lateral or cross support stay or
sustaining rib, whereby additional strength is imparted to the frame and both the
gauze and its carrying or boundary edging or framing are prevented from collapsing
or protected from injury, substantially as described and set forth.
Secondly. In the frames or boundary edgings of gauze cups or D-gauzes
having sustaining supports or ribs, making the said supports or ribs in one piece
with the general framing, and from thin sheet metal, substantially as described and
set forth.
Dated this 20th day of November 1803
ROBERT PURDOM,
HENRY STOKES,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicants.