Improvements in Nose Clips or Double Eye Glasses.
Year: 1895

page_text: Date of Application, 29th Mar., 1895
Complete Specification Left, 27th Dec., 1895-Accepted, 21st Mar., 1896
PROVISIONAL SPECIFICATION.
Improvements in Nose Clips or Double Eye Glasses.
We, GEORGE WALKER HERDMAN, Civil Engineer, 12 Bruntsfield Crescent
Edinburgh, and PETER STEVENSON, Optician, 9 Forrest Road, Edinburgh, do
hereby declare the nature of this invention to be as follows:-
This invention relates to detail improvements in the nose clips and bridge of
double eyeglasses or "pince nezs "and of that type known as astygmatic clips, i.e.
the type employed when a cylindrically ground lens is used to rectify an irregularity
in the corner of the eye, and when it is essential that the axis of each lens should
make a definite angle with the line through the centres of the two eyes.
In carrying out the invention the rims containing the glasses or lenses are
connected by a rigid bridge either composed of one piece or of two pieces hinged
together.
In the latter form this bridge is so hinged on a vertical pivot that the one glass
or lens can fold over upon the other glass or lens but when opened for use the
glasses or lenses cannot vary in their distance from one another, centre to centre,
nor in the angle of their axes to each other.
The said hinge is not at a point equidistant between the two glasses or lenses but
allows the one to overlap a short distance beyond the other when they are folded
together.
To the bridge at points equidistant from the rims holding the glasses or lenses
are pivoted the two levers holding the placquets.
The lower end of each of these levers receives on a pivot a placquet and also on
the same pivot holds the lower end of a curved steel spring whose upper end is
attached to the bridge at its junction with the rim.
The upper end of each of the levers extends above the bridge and is curved
outwards to receive the finger and thumb when the eye glasses are being placed
upon the nose.
Thus by pressing together the upper ends of the levers the lower ends holding
the placquets are separated and at the same time the springs attached to the levers
and to the bridge are curved out of their ordinary shape, so that in coming to their
normal form, when released they push together the placquets which thus grip
the nose.
In carrying out another form of the invention the bridge is composed of one rigid
unhinged bar as above mentioned.
'
The two levers are pivoted, as already described, but above the bridge they are
bent towards the centre so as to cross each other, and the one is provided with a
pivot which slides in a slot cut in the other.
A knob on one of the levers is used to depress the levers in order to put
the glasses on the nose.
The springs causing the pressure on the placquets may be as already described,
or they may each be fixed by the one end to the placquet and by the other end to
the lower part of the rim, or they may each be fixed by the one end to the placquet
and after forming a complete coil be fixed by the other end to the bridge at its
junction with the rim, as above described, or one spring may be used fixed at its
centre to the bridge and pressing with its two ends on the two levers.
Dated this Twenty-eighth day of March 1895.
G. W. HERDMAN.
PETER STEVENSON.

page_text: Improvements in Nose Clips or Double Eye Glasses.
We, GEORGE WALKER HERDMAN, Master of Arts, and Bachelor of Science,
Edinburgh, c/o Mr. Thomas Stewart Č.E. 6 St. George's Chambers, Cape Town
South Africa, and PETER STEVENSON, Optician, 9 Forrest Road, Edinburgh, 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 :-
This invention relates to improvements in the nose clips and bridge of double
eye glasses, or "pince nez," and of that type known as "astygmatic clips," i.e. the
type employed when a cylindrically ground lens is used to rectify an irregularity
in the corner of the eye, and when it is essential that the axis of each lens should
make a definite angle with the line through the centres of the two eyes.
In order that the said invention, and the manner of performing, or carrying the
same into effect, or practice, may be properly understood, there is appended
hereto two explanatory sheets of drawings, to which the letters within brackets
refer.
In carrying out the invention the rims (a) containing the glasses or lenses (b) are
connected by a rigid bridge (c) composed either of one piece (c) [see Figs. 1 & 2]
or of two pieces (c2c) [see Figs. 3 & 4] hinged together.
In the latter form this bridge (c, c) is so hinged on a vertical pivot (d) that the
one glass can fold over the other glass, but, when opened for use, the glasses
cannot vary in their distance from one another, centre to centre, nor in the angle
of their axes to each other.
This hinge is not at a point equidistant from the two glasses but is situated so as
to allow the one glass to overlap a short distance beyond the other when they are
folded together.
To the bridge at points (e) equidistant from the rims (a) are pivoted two
levers (f) holding the plaquets (g).
The lower end of each of these levers (f) receives on a pivot (h) a plaquet, (9)
and also, on the same pivot, holds the lower end of a curved spring (i) whose upper
end is attached to the bridge by a pivot (j).
The upper end (k) of each of the levers (f) extends above the bridge and
is curved outwards to receive the finger and thumb when the eyeglasses are being
placed upon the nose.
Thus by pressing together the upper ends (k) of the levers, the lower ends
holding the plaquets (9) are separated and at the same time the springs (i) are
curved out of their ordinary form so that in coming to their normal shape when
released, they push together the plaquets which thus grip the nose.
The pivots (e) at the upper ends of the levers (f) are put into the bridge at an
angle [see Fig. 4] so that when the glasses are on the nose the plaquets are
advanced towards the face, but when off the nose and the springs (i) are released,
the plaquets fall back into the plane of the glasses.
In carrying out the other form of the invention the bridge is composed of one
rigid unhinged bar (c,) [see Figs. 1 & 2].
The two levers (f) are pivoted as already described, but above the bridge (c)
they are bent towards the centre so as to cross each other, and the one is provided
with a pivot (1) which slides in a slot (m) cut in the other.
There is a knob (n) on one of the levers (f) and on depressing it the plaquets (9)
are separated to put the glasses on the nose.

page_text: Having now particularly described and ascertained the nature of the inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
:-
1. In double eye glasses, having a fixed bridge between the rims, and having the
same to hinge on a pivot, substantially as described and set forth.
2. In double eye glasses, fixing the plaquets to levers pivoted to the bridge,
substantially as described and set forth.
3. In double eye glasses, having a pivot in the one lever sliding in a slot in the
other lever, substantially as described and set forth.
4. In double eye glasses, attaching the springs for the plaquets by the one end
to the plaquet and by the other end to the bridge, substantially as described and
set forth.
5. In double eye glasses, the improvements in, and in the construction, arrange-
ment, and combination of, the parts of the same, substantially as herein described
and set forth.
G. W. HERDMAN.
PETER STEVENSON.