Improvements in the Construction of Frames for Spectacles and other Eye-glasses.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Frames for Spectacles and
other Eye-glasses.
I, NATHAN LAZARUS, of 28 Sutherland Avenue, Harrow Road, London, W.,
Optician, do hereby declare the nature of my said invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
Whereas in the construction of frames for spectacles and other eye-glasses, it has
hitherto been the practice to form two lugs or projections upon the frame surrounding
the glass. The glass is inserted in the frame while the lugs are a small distance
apart. The lugs are then drawn together, so as to enclose and secure the glass in the
frame, by means of a very small screw, the head of which is sunk in one of the
lugs, and the screw is threaded into the other, whereby the frame is caused to fit
the glass.
Now the object of my invention is to provide improved means for the manipulation
of the frames with or without the use of screws; thereby simplifying the manufacture,
and providing frames perfectly adapted for holding lenses of different calibres.
In carrying out my invention, I form the frame surrounding the glass in such a
manner that the frame may be sprung open for the insertion of the glass, after which
it contracts again upon the glass, automatically, with sufficient force to hold it securely
in the frame.
The expansion and contraction of the frame are provided for by adding to some
convenient part of the frame, a projecting spring, consisting of a small coil or coils
affixed to or formed in one with the frame, which allows the frame to open, when
required, and causes it contract again, automatically, when left to itself. These
projecting spring portions of the frame may be utilised, in connection with ordinary
spectacles, for supporting the hinged ends, which may be soldered or brazed thereto;
and, in connection with folders, the handle may be similarly attached. Or the coil or
coils may be utilized for similar or analogous purposes. The coils may (if preferred)
be fitted in connection with the ordinary lugs.
In this Specification the word "coil
is intended to include springs of a
circular, elliptical, rectangular, or other regular or irregular shape capable of resilient
action.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is an elevation of a pair of spectacles, formed in accordance with my
invention.
Fig. 2 is an elevation of a pair of folders.
Fig. 3 is an elevation, (drawn to an enlarged scale) showing the method of attaching
the spring to the frame."
Fig. 4 is an edge view, illustrating the application of a single coil to the frame.
Fig. 5 is also an edge view, illustrating the application of a double coil b³.
Fig. 6 shows the method of combining the coil with the ordinary lugs.
a is the frame. 66' are the coiled springs, which may be placed in the positions
shown in Fig. 1, or in those shown in Figs. 2 and 6, or in any other convenient
positions.
The coil b is thinned off at 6' 6', and these ends are firmly brazed to the frame a.
c is an opening in the frame a, to allow of its expansion.
In the arrangement shown in Fig. 6, d is the ordinary hinge, formed by two lugs
held together by a screw, and having a rivet for the pivot of the hinge, the spring

page_text: The ends of the spring shown in Fig. 6 may be attached to the opposite lug, if
preferred instead of as shown.
Other forms of springs may be used, and the spring may be formed (if preferred) in
one with the frame.
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 :-
In the construction of frames for spectacles and other eye-glasses, the method of
providing for resilient action of the combined springs and frames, substantially as
hereinbefore described and illustrated by the drawings.
Dated 10th Deco 1000
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.