US1224361A - Eyeglass construction. - Google Patents

Description

provide simple,

' the bridge or nose-piece,

.there is provided each lug 3 a recess 4 having side walls wh ch: are preferably undercut as indicated at 5.' These recesses may be of any desired con- I tour,such as that indicated by the dotted g 'TED%TATE% EAT w s'rnrnnn J. CLULEE, or ATTLEBORO, massacirusnr rs.

EYEGLASS consrnucrlons To all-whom it may concern/:-

a citizen of the United States, and residing at Attleboro, in the county of Bristol and State of Massachusetts, have invented a new and Improved Eyeglass Construction, of which the following specificationw is a'full disclosure.

This invention relates to eyeglass construction.v One of the objects thereof is to practical and reliable means for securing a supporting member to an eyeglass lens. Another object is to provide means of the above type which may be used quickly and conveniently and at a-low cost. Another object is to provide an art ofsecuring together an eyeglass lens and a supporting member.

. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations. of

elements, arrangement .of parts, and in the several steps and relation and order of such steps which will be set forth in'the following description, and the scope of the application of which will be indicated in the appended claims.

In the accompanying drawing, in which is shown one of various possible embodiments of the mechanical features of this invention, Figure 1 is a side elevation of a lens with -a supporting member or clamp mounted thereon. Fig, 2 is a cross-section taken along the line 'AA of Fig. 1.

Similar reference characters refer to similar parts throughout both views of the draw- Referring now to Fig. 1 of the drawing, there is indicated at 1 an eyeglass lens, and it may here be noted that the term eyeglass is used throughout to comprehend spectacles and like devices, as well as glasses mounted upon the nose. Secured to lens 1 is a lens clamp comprising a strap portion 2 and side wings or lugs 3. This lens clamp may be secured in any desired manner to not being shown as they form in themselves no part of the present invention. 7

As best shown in Fig. 2 of the draw ng, in the inner surface of Specification of Letters Patent.

Application filed May 3, 1

the securing means Patented May 1, 19117.

915. Serial No. 25,479.

line6 in Fig. 1 of the, drawings. Formed in the base or strap portion 2 is a recess 7 also undercut, and preferably extending for a substantial distance circumferentiall of the lens, as indicated at 8 in Fig. l o the drawing.

Recesses 4 and 7 are filled with a vitreous I as enamel, which is prefersubstance, such ably fused to the contacting surfaces of the lens clamp, the latterterm being broadly used to cover any device of this general nature secured to an edge of the lens. There is thus provided throughout a considerable proportion of the interior of the lens clamp a non-metallic and preferably glazed surface which adheres to the metal of the lens clamp with the greatest tenacity. In so far as the broader features of this invention are concerned, this enameling may be applied directly to the inner surface of the lens clamp without forming the recesses 1 and 7 butthere are many advantages in the arrangement shown.

The lens clamp thus formed is fitted about the edge portion of the lens 1 at the. proper point and securely cemented thereto by a suitable adhesive which may, if desired, be

fusible at a low temperature to permit removal of a broken lens.

It being understood that prior to mount,

ing the lens clamp in position the vitreous enamel is fused, as by baking, to the surface of the metal, and inasmuch, further, as a glassy substance of this nature may be cemented to the glass of the lens with far greater,tenacity than it isvpracticable to cement metal to glass, it will be seen that an extremely strong connection may be made. Furthermore, by the use of the several recesses, as shown, there is'provided a three-point connection which is rigid and durable to a high degree. Also, a cement is here employed which is specifically adapted and lntended to adhere to a glassy surface without having to so modify it and impair it as to adapt it for adhesion to a metallic surface, as when metal is cemented directly to glass. Furthermore, the effect of the expansion and contraction of the metal with varying temperature does not here tend to loosen the attachment of the lens clamp with {the lens.

The method of use of the above device has been described in substance, but it, may be noted that when the lens is to be secured to the clamp, there is preferably applied to heated, and, the lens is then properly posi-- the interior of the clamp a thin film of readily fusible cement, the clamp being tioned between the side wings of the clamp. When the parts cool, there is thus provided a joint'in which the fused inserts not only interlock with, but form substantially a part of, the clamp and theseas well as the metallic surface of the clamp are cemented in place to the engaging surface of the lens with a cement which will securely hold them in position. i

It will thus be seen that there is provided a device and an art in which the objects of thisinvention are achieved and which are v well suited towithstand conditions of the hardest practical use. I As various changes might be made in the above construction, and as the above described art might be carried on in a some 1 what different manner, it is intended that all matters shownin the accompanying drawing or set forth in the foregoing de-' scription shall be interpreted as illustrative tion, a lens clamp having a vitreous material fused against its inner surface in'position to engage the lens.

3. In eyeglass construction, in combination, a lens, a lens clamp having a refractory non-"metallic material fused against its in ner surface, and means cementing said nonmetallic surfaceto said lens.

4. In eyeglass construction, in combination, a lens, a lens clamp having a refractory non-metallic material fused against its vinner surface, and means cementing said non-metallic surface to said lens, said nonmetallic material being positioned on the weasel inner surface of each side lug and'of the I strap portion of-the clamp.

5..In eyeglass construction, in combina tion, a lens, a lens clamp having a plurality of recesses in its inner surface, a'vitreous material secured within each of said recesses to form'inserts therein, the surfaces of said inserts being adapted to. fit smoothly and closely the outer surface of an edge portion of said lens, and means cementing said vitreous material to the engaglng surfaces of said lens.

6. In eyeglass construction, in combination, a lens, a'lens clamp having a plurality of recesses in'its inner surface, a vitreous material secured within eachof said recesses to form inserts therein, the surfaces of said inserts beingadapted to fit' smoothly and closely the outer surface of an edge portion of'said lens, and means cementing said vitreous materlal to the engaging surfaces of said lens, said vitreous material being fused to'the surfacesof-the metallic lens clamp which it engages.

7. The art which comprises fusing a vitreous material against the inner surface of a metallic lens clamp, inserting a lens within said clamp with cement fusible at low temperature between thesurface of the lens and the surface of said vitreous material,

said cement being heated to atemperature above its fusing point and .below' the fusing point of saidvitreous material, and permitting said cement to cool.

8. The art which comprises applying enamel fusible at high temperature to the inner surface of a lens clamp and fusing it against the same to form smooth exposed surfaces, interposing a cement fusible at low Y temperature between said enamel and the surface of a lens fitted in said clamp, heating said cement to a relatively low temperature to fuse it, and permitting the parts to cool.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

STEPHEN J. CLULEE. Witnesses:

WALTER A. BRIGGS, PETER NERNEY.

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