Glasses frame

This frame, comprising for each of the lenses to be supported an open metallic eye-piece and of which the ends are adapted to abut one against the other by means of a mutually screwing member is characterized in that the two ends of the metallic eye-piece cooperate with a common guiding groove provided in a connecting lug so that, by relative engagement of its ends in the groove, they are perfectly aligned one in the extension of the other.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a glasses frame or analogue optical 
accessory, allowing to facilitate the mounting inside a support of each of 
the ophthalmic lenses and to ensure, once the mounting has been achieved, 
reliable immobilization or securing of each lens so that the lens is 
unable to escape from the frame even under the effect of a shock or an 
effort accidentally exerted thereon. 
Description of the Prior Art 
It is known that glasses frames are usually produced, either from a 
material that is relatively resilient, such as plastic material or shell 
material, for example, or from a metal, this latter solution generally 
allowing to render the frame very fine as well as light-weight. 
Nevertheless, to allow the reliable placing in position of lenses in this 
type of metallic frame, and to ensure the effective immobilization of 
these lenses once they have been mounted, it is already known to provide 
each eye-piece or generally rounded form of the frame, adapted to receive 
corrective lens, with a transversal slot that opens the eye-piece and 
allows through the resiliency of the metal, to surround the lens over its 
entire periphery by the metallic part opposite the frame. At each end of 
the eye-piece is provided a retaining block. The two ends of the eye-piece 
must be in abutment and made integral with the other, generally through 
means of a screw that cooperates with the two retaining blocks. This 
arrangement gives rise to difficulties, especially for the two parts of 
the eye-pieces to be exactly placed in the extension and upon contact with 
each other, while suitably pressing the lens. 
SUMMARY OF THE INVENTION 
The present invention concerns an adjustable glasses frame, in particular 
produced in metal at least in its part that surround the corrective or 
protective lenses, and which allows to overcome the drawbacks of the 
former solutions known up till now. 
For this purpose, the present frame comprising for each of the lenses to be 
supported an open metallic eye-piece of which the two ends are adapted to 
be in abutment one against the other, is characterized in that the two 
ends of the metallic eye-piece cooperate with a common guiding groove 
provided in a connecting lug so that, through relative engagement of the 
two ends in the groove, one is exactly aligned in the extension of the 
other. 
Advantageously and in a manner known per se, the two opposite ends of the 
metallic eye-piece each comprise a lateral retaining block, secured into 
or integrally manufactured on the side of the eye-piece, at least one of 
these retaining blocks being provided with a threaded bore for receiving a 
screw for securing together the ends of the eye-piece. 
Furthermore, one of the ends of the eye-piece is preferably secured in the 
guiding groove, while the other end is slidably mounted in said groove. 
According to another feature, the connecting lug comprises an open recess 
in which are embedded and fitted both of the lateral retaining blocks, 
this recess communicating with the guiding groove receiving the two ends 
of the eye-piece. 
In one particular variant of the invention, the connecting lug is laterally 
extended by a hinge element for the pivoting on the lug of one of the arms 
of the glasses and in another opposite embodiment, the correcting lug is 
laterally extended by a supporting element of the nasal rest piece of the 
spectacles.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
As represented in FIG. 1, the glasses frame of the present invention, 
designated by the general reference numeral 1, is constituted by means of 
an open metallic eye-piece of which the ends 2 and 3 respectively, are 
separated from one another by a transversal cut providing at the tip of 
each of each of these ends an opposite face 4. The ends 2 and 3 of the 
metallic eye-piece each comprise a lateral retaining block, respectively 5 
and 6, secured thereto by welding or any other analogous means on the side 
of each end, or even integrally manufactured with the metallic eye-piece 
itself. At least one of these blocks, for example block 6, comprises a 
threaded bore 8. A screw 9 crosses through the bore 7 of the block 5 and 
is engaged in the threaded hole 8 of the block 6 allowing the tightening 
of the two blocks 5, 6 in abutment one against the other on their opposite 
faces 4. 
The metallic eye-piece can thus ensure the mounting and the immobilization 
of a corrective lens (not represented) by the setting in position and the 
suitable tightening of it with the ends of the eye-piece brought closer 
together by means of the screw. 
However, it will be evident that without, particular complementary 
dispositions, the setting in position of the screw and the suitable 
abutment Of the retaining blocks 5 and 6 in their perfect extension is 
difficult to achieve, especially without provoking prejudicial torsions on 
the ends 2 and 3, which would lead to a defective positioning of the 
associated lens. 
In order to overcome this drawback and according to the invention, the ends 
2 and 3 of the metallic eye-piece are guided by a lug 12 provided with a 
continuous and elongated groove 13 where its ends are engaged. Preferably, 
the lug 12 presents an open housing 14, of large enough dimensions to 
allow that the retaining blocks 5 and 6 be fitted and embedded within. 
According to one particular embodiment, the end 3, for example, of the 
metallic eye-piece is secured by crimping, welding or any other means, in 
the lug 12 in such a manner that its retaining block 6 especially bears on 
a portion 15 of the recess 14, while the other end 2 can slide freely in 
the groove 13 until it forces the blocks 5 and 6 to abut one another so 
that said blocks are in exact alignment, the screw 9 being able to be 
mounted in the threaded bore 8 without any risk of warping or buckling of 
the metallic eye-piece. 
The lug 12 advantageously comprises a lateral piece 16 extended by two 
parallel parts 17 and 18 forming one of the elements of a hinge on the lug 
and thereafter on the frame 1 of one of the lateral side-pieces of the 
glasses (not represented) by means of a screw engaged in a threaded hole 
19 provided i the parts 17 and 18. 
A glasses frame having a simple design is thus produced that, with a 
metallic eye-piece, allows easy mounting and immobilization of a 
corrective or protective lens, without risks of transversal or lateral 
forces that are prejudicial to the lens itself, this lens, once in 
position, being pressed in the eye-piece by the moving closer of its two 
ends in the plane of the lens with a constant guiding of the ends to be 
moved closer until their abutment in the exact extension of each other. 
It is well understood that the present invention is in no way limited to 
the embodiment described and represented in its particular variant, but on 
the contrary encompasses all variants. More especially, it is equally 
possible within the framework of the invention to place the lug on the 
side of the support element of the nasal rest piece, usually mounted 
between the eye-pieces corresponding to the two lenses of the glasses.