IMPROVEMENTS IN EYE GLASSES
Year: 1884

page_text: I HENRY HARRIS LAKE of the firm of Haseltine Lake & Co. Patent Agents
Southampton Buildings in the County of Middlesex do hereby declare the nature
of said Invention for "IMPROVEMENTS IN EYE GLASSES" 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 eye-glasses, and has for its object to provide a spring
which cannot be bent out of shape or adjustment, and by means of which the
lenses may be readily adjusted to the eyes, and the frames made to conform to the
bridge of the nose so as to have the focal centre always coincident with the normal
line of sight.
The said Invention consists partly in making the spring in two parts or sections
and connecting them by means of a stiff yoke of such a shape that they overhang
the lenses or frames thereof whereby any undue strain on the springs will cause
the glasses or frames containing them to abut against the yoke or against the
ends of the springs where the latter are attached to the yoke, and thus prevent
any further straining or bending of the spring.
By reason of the independent arrangement of the springs either glass may be
separately adjusted to the sight so as to accommodate it to any abnormal optical
condition.
The Invention also comprises the combination with an eye-glass of nose pieces
each consisting of an inclined bar having an arm integral therewith projecting
from a point near its middle, whereby the angle of the nose pieces and the distance
apart of the centres of the lenses may be permanently adjusted as desired.
In the accompanying Drawing
Figure 1 is a side elevation of the improved eye glasses.
Figure 2 is a front view of the same.
Figure 3 is a top or plan view and,
Figure 4 is a view of a detached portion.
Similar letters of reference indicate corresponding parts in the several Figures.
A indicates the lenses which may be mounted in the rims or not according as
may be desired, and B, B indicate the nose pieces attached to the lenses or rims.

page_text: To these nose pieces are secured the separate springs C curved reversely and
fastened as shown to a connecting yoke D, whose ends overhang the tops of the
lenses or frames coincident with the spring C, and consisting of a piece of metal
having sufficient stiffness to resist the pressure or force of the spring.
As shown, the springs are curved or bent outwardly over the rims or edges of
the lenses, so that when the latter are spread apart the said edges or rims come in
contact with the projecting ends of the springs at the points of their attachment
to the yoke: The latter being rigid prevents any further bending of the springs
and thus avoids injury to the same.
It is obvious that either lens may be adjusted independently of the other by
simply bending its attached spring so as to adapt it to all irregularities of vision
to make it conform to the anatomy of the nose, and to prevent straining of
the eyes.
The yoke is shown as being a piece of metal to which the springs are rivetted,
but the springs and yoke may be integral.
Each of the nose pieces B consists of an inclined bar a having an arm b, by
which the nose piece is attached with a screw c to any convenient part of the
frame or lens, but preferably as shown in the Drawing, in which it is screwed fast
upon the top of the spring bow, and is held from moving by means of the sides of
the recess in which the arm of the nose piece and bow are secured. The arm
is made integral with the bar a; and, projecting from a point near the middle,
relieves the torsional strain-therefrom The said arin also being curved practically
lengthens the bar, so that it can be inore readily twisted or bent. The arm b
being of considerable length and of metal, that will readily bend as desired, when
80 bent will retain its form and can be readily twisted, to slightly change the
position or angle of the bar to suit the shape of the nose; or by bending the
said arms b, the bars a, a, forming the nose pieces proper can be readily brought
closer together or farther apart as desired, and thus the distance of the optical
centres of the lenses can be varied as desired.
Having now particularly d-scribed and ascertained the nature of my sid
Invention, and in what manner the same is to be performed, I declare that what
I claim is
First. A yoke attached to the springs of a pair of eye glasses and having its
ends constitute an abutment for the lenses or frames at the top thereof.
Second. The combination in a pair of eye glasses having a yoke D, of the nose
pieces B, cach consisting of the inclined bar a having the arm b integral therewith
and projecting from a point near its middle, substantially as, and for the purpose,
specified.
Third. The combination in a pair of eye-glasses having a yoke D, of the nose
pieces B, formed of comparatively soft metal, each having the inclined bar a and
the curved arm b integral therewith and projecting from a point near its middle,
substantially as, and for the purpose, specified.
HASELTINE, LAKE & Co.,
For the Applicant.