A Detail Improvement in Spectacles.
Year: 1893

page_text: Date of Application, 4th Nov., 1893
Complete Specification Left, 27th Apr., 1894-Accepted, 2nd June, 1894
A Detail Improvement in Spectacles.
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 to be as follows:
Our invention relates to a detail improvement in the making and attachment of
nose bridges or saddle bridges of rims of spectacles, and our said invention has for
its object primarily, increasing the strength of the attachment parts and giving
elegance of appearance to the same.
•
By one part of our invention, the said nose bridges are made from cut-out blanks
of thin sheet metal, with double tie attachment ends which are brazed upon the
opposite sides of the rims respectively of the glasses.
Heretofore the said nose bridges have been made from wire, and with the
attachment ends provided only with single ties, which are brazed upon the rims of
the glasses.
In carrying out one form of our invention, we make a nose bridge up of a sheet
metal blank, alike unto a narrow bar, preferably swelled or expanded laterally
about its middle, and with its ends formed crutch-wise, and with the said crutch
ends directed obliquely to an angle of about 45 degrees and in opposite directions,
or with the same disposed towards a common centre, that is to say, the crutch or
Tends make an obtuse angle with the top edge of the bar and an acute angle with
the lower edge of the bar.
This obliquity of the T or crutch ends is devised to follow (when slightly
cambered) the general contour of the parts of the frames to which they are to be
attached.
Now these said T ends form the double ties hereinbefore referred to, and when
the same are brazed to the frames or within cut-away recesses inade within the
opposed sides of them, a strong and neat connection, is made, without any risk of
the said bridges becoming disconnected from the frames, as they have a double
hold, and are symmetrically disposed upon the two opposite sides of the ends of the
bridge, which is shaped to the contour of the nose and bent into a W or other shape
as may be required.
We might add that the fashioning of the said nose in the flat is performed by
dies and pressure, and so also is the general shaping.
In carrying out a further form of our invention in connection with double tie
ends made all in one piece with the bridge, we take a suitable length of wire of a
desirable gauge, and longitudinally split or subdivide the ends to a short distance
from their extremities, and then open out the said divided parts into inclined or
obliquely disposed crutch-ended tie connections.
The other part of the wire is flattened to an extent sufficient to make a broad
presented bearing surface.
After the flattening and fashioning of the ends, the whole is then brought into
shape, and the inclined and cambered crutch ends brazed to the frames.
Dated this 3rd day of November 1893.

page_text: A Detail Improvement in Spectacles.
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 a detail improvement in the making and attachment of
nose bridges
or saddle bridges of rims of spectacles, and our said invention has for
its object primarily, increasing the strength of the attachment parts and giving
elegance of appearance to the same.
By one part of our invention, the said nose bridges are made from cut-out blanks
of thin sheet metal, with double tie attachment ends which are brazed upon opposite
sides of the rims respectively, of the glasses.
Heretofore the said nose bridges have been made from wire, and with the
attachment ends provided only with single ties which are brazed upon the rims of
the glasses.
In carrying out one form of our invention, we make a nose bridge up of a sheet
metal blank, alike unto a narrow bar, preferably swelled or expanded laterally
about its middle, and with its ends formed crutch-wise, and with the said crutch
ends directed obliquely to an angle of about 45 degrees and in opposite directions,
or with the same disposed towards a common centre, that is to say, the crutch or
Tends make an obtuse angle with the top edge of the bar and an acute angle with
the lower edge of the bar.
This obliquity of the T or crutch ends is devised to follow (when slightly
cambered) the general contour of the parts of the frames to which they are to be
attached.
Now these said T ends form the double ties herein before referred to, and when
the same are brazed to the frames or within cut-away recesses made within the
opposed sides of them, a strong and neat connection is made, without any risk of
the said bridges becoming disconnected from the frames, as they have a double
hold, and are symmetrically disposed upon the two opposite sides of the ends of the
bridge, which is shaped to the contour of the nose and bent into a W or other shape
as may be required.
We might add that the fashioning of the said nose in the flat is performed by dies
and pressure, and so also is the general shaping.
In carrying out a further form of our invention in connection with double tic ends
made all in one piece with the bridge, we take a suitable length of wire of a desirable
gauge, and longitudinally split or subdivide the ends to a short distance from their
extremities, and then open out the said divided parts into inclined or obliquely
disposed crutch-ended tie connections.
.
The other part of the wire is flattened to an extent sufficient to make a broad
presented bearing surface.
After the flattening and fashioning of the ends, the whole is then brought into
shape, and the inclined and cambered crutch ends brazed to the frames.
Figure 1 of the accompanying drawing represents in front elevation a pair of
spectacles having a nose bridge made, fitted and attached according to our
invention.
It will be seen that the said nose bridge, or what is sometimes called the saddle
bridge is united to the two opposite sides of the rims by double tie or crutch-
shaped ends, whereby the junctions or the points of connection of the components
are greatly strengthened.

page_text: Figure 2 represents a plan of the rough metal blank from which the nose bridge-
is made or fashioned.
Figure 3 is an edge view of Figure 2.
In
Figure 4 represents the component parts of the frame of the said pair of spectacles.
separated.
Figure 5 represents a top-side plan of the nose bridge shown in Figure 4,.
separately.
Figure 6 is a transverse section of the same upon the dotted lines A B Figure 5..
In Figures and 4, a is the bridge, with double tie ends a², which take
within like shaped recesses or sinkings, formed within the opposite sides b', of the.
rims b.
In making the nose bridge or saddle bridge we cut out from sheet metal, the blank
Figures 2 and 3, and by dies and tools, we fashion the same into shape and give it
the figure as represented in Figures 4, 5 and 6.
The crutch-shaped or double tie ends are then inserted within previously cut-out
recesses 62, formed within the opposite sides 6, of the rims b, and are there brazed.
in position and the superfluous metal is removed either by clipping, filing or-
otherwise, hence a finished article is represented in Figure 1.
As a further form of our invention, we take a piece of wire Figure 7 and spread.
the same out laterally into a flat bar Figure 8, having its middle broader than the
ends, which are split up their middles in the general direction of the blank to an
extent to form the double tic ends a³, when the split parts are opened-out and turned.
in opposite directions as represented in Figure 9.
The blank Figure 9 is then fashioned, shaped and finished into the nose bridge-
represented in elevation, plan and section in Figures 4, 5 and 6.
In a further form of our invention, we cut out a strip of metal as in Figures 10
and 11, spread the same out about its middle and split the ends longitudinally as in.
Figure 8. The split parts are then turned obliquely and in opposite directions.
into the form represented in Figure 9, which is fashioned and fitted in the way. as.
already described.
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 the nose bridges of spectacles, uniting the same to the rims by
crutch-shaped terminations or by double tie ends, substantially as described and set-
forth.
Secondly. In the nose bridges of spectacles, uniting the same to the rims by
crutch-shaped terminations or double tie ends fitted and brazed or otherwise affixed
within like-shaped recesses formed within the opposite or opposed sides of the said.
rims, substantially as described and set forth.
Thirdly. Making the nose bridges or saddle bridges of spectacles from a blank
of sheet metal, and in the way substantially as described and set forth in Figures 2:
and 3.
Fourthly. Making the nose or saddle bridges of spectacles from wire and in the
way substantially as described and set forth in Figures 7, 8 and 9.
Fifthly. Making the nose or saddle bridges of spectacles from sheet or strip.
metal and in the way substantially as described and set forth in Figures 10, 11
and 9.
LATAN LAIS ZOLA OBVO ADMILLONEZ
ZOLA OY O ADELL LOEZ
ROBERT PURDOM,
HENRY STOKES,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicants..