Improvements in the Bridges of Pince-nez or Double Eyeglasses.
Year: 1893

page_text: Date of Application, 26th May, 1893
Complete Specification Left, 13th Feb., 1894-Accepted, 7th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Bridges of Pince-nez or Double Eyeglasses.
I, FREDERICK ALEXANDER DYAs of 52 Queen Street, Glasgow, Lanarkshire,
Optician, do hereby declare the nature of my invention to be as follows:-
This invention has reference to and comprises improvements in the construction
of the bridges of pince-nez or double eyeglasses. These bridges are formed in
two main straight parallel parts which slide over or past each other, and are
adjustably held on the wearers nose by a helical spring mounted between collars or
eyes at the ends of the two bridge parts.
Heretofore these two bridge parts have been liable to get loose and oscillate
about out of order, and been difficult to repair.
My improvements are designed to obviate this and to enable the parts to be
adjustably tightened up and easily repaired should they get loose. These
improvements consist in forming one of the rigid straight parts of the bridge of a
hollow or shell shape, preferably slit or open on its upper longitudinal edge, and
of a triangular, square, or polygonal shape in cross section.
The other sliding
part of bridge would be formed solid of corresponding shape to fit and slide within
the other hollow shaped bridge part. Collars or eyes would be fitted at the free
ends of these two bridge parts, and have a helical spring mounted between these
collars on the outside of the bridge parts for adjustably securing the plaquets on
the nose.
By this construction there is little liability of the bridge parts to shake loose
from each other, and any slight deviation can be easily and quickly adjusted or
repaired.
Dated 25th May 1902
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in the Bridges of Pince-nez or Double Eyeglasses.
I, FREDERICK ALEXANDER DYAS, of 52 Queen Street, Glasgow, Lanarkshire,
Optician, do hereby declare the nature of my invention, and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement in writing, that is to say :-
This invention has reference to and comprises improvements in the construction
of the bridges of pince-nez or double eyeglasses. These bridges are formed in
two main straight parallel parts which slide over or past each other and are
adjustably held on the wearers nose by a helical spring mounted between collars
or eyes at the ends of the two bridge parts.
Heretofore these two bridge parts have been liable to get loose and oscillate
about out of order, and been difficult to repair.
My improvements are designed to obviate this and to enable the parts to be
adjustably tightened up and easily repaired should they get loose.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended an explanatory sheet of drawings in which
Figure 1 represents an elevation and Figure 2 a plan view of a pince-nez or
double eyeglass as fitted with my improvements.

page_text: Figures 3 and 4 are a longitudinal view partly in section and an end view
respectively of the one or hollow sliding part of the bridge, and its fixed end
collar; and Figures 5 and 6 are corresponding views of the other or inner solid
sliding part of bridge and its loose end collar. While Figure 7 is a transverse
section through the two sliding parts of bridge, as taken on the line 2-2
Figure 2.
Referring to these drawings:-My improvements consist in forming one of
the rigid straight parts a of the bridge of a hollow channel or shell shape,
preferably slit or open on its upper longitudinal edge a', although it may be slit
at the lower part or sides, and of a triangular shape in cross section, as shown in
Figure 4, but it might be formed of square or polygonal shape. The other
sliding part b of bridge would preferably be formed solid of corresponding shape
to fit and slide within the other hollow shaped bridge part a. Collars or
eyes a², b³, would be fitted at the free ends of these two bridge parts a, b, the
one a being formed on the part a and the collar being mounted loosely on the
part b and secured by a pinching screw, as shown in Figures 5 and 6, and a helical
spring c is mounted between these collars a², 63, on the outside of the bridge parts
for adjustably securing the plaquets d d on the nose. By this construction there
is little liability of the bridge parts ab to shake loose from each other, and any
slight deviation can be easily and quickly adjusted or repaired.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
First. The constructing of the rigid straight parts of the bridges of pince-nez
or double eyeglasses having the one sliding part formed of a hollow channel or
shell shape for the other part to fit and slide therein, substantially as herein
described in reference to and by way of application shown in the accompanying
drawings.
Second. In pince-nez or double eyeglasses, the combination comprising the
straight bridge parts formed of hollow and solid shape respectively for the oue
part to slide within the other, and having end collars and a helical spring sub-
stantially as herein described in reference to and by way of application shown in
the accompanying drawings.
Dated the 12th day of February 1894.
W. R. M. THOMSON, & Co.,
96, Buchanan Street, Glasgow, Agents.