US1668091A

US1668091A - Island

Info

Publication number: US1668091A
Authority: US
Publication date: 1928-05-01
Anticipated expiration: 1945-05-01

Description

-May 1. 1928.

F. A. STEVENS ET AL OPHTHALMIC MOUNTING AND METHOD Filed JulyB, 1922 ljiomgyk Patented May l,

hliTED STATtZ M he.

seer

FREDERICK A. STEVENS AND JAMES W. WELSH, OF PROVIDENCE, RHODE ISLAND, AS-

SIGNORS, MESNE ASSIGNMENTS, TO BAUSGE AND LOMB OPTICAL COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION 013 NEVJ YORK.

OPIITHALMIC MOUNTING AND METHOD Application filed July 8, 1922. Serial No. 573,656.

The present invention relates to ophthalmic mountings and methods of making the,

same.

The chief object of the invention to improve upon present-day methods of manufacturing'endless non-metallic lens rims.

Other objects will appear hereinafter.

In the accompanying drawings, Fig. 1 is a view of a lens rim constructed according to a preferred embodiment of. the present invention; Fig.2 is a detail of the same, partly in section; Figs. 4-, 5 and 6 are sim lar details of modifications: Fin. 7 is a section taken upon the line Z'? of Fig. 6;

Figs. 8, 9 and 10 are views similar to Fig. 2

of further modifications; and Fig. 11 is a section taken upon the line 111.1 of Fig. 10,

It has been the practice hitherto to manufacture endless lens rims of non-metallic material, like zylonite and the like, by dieing them out of sheet stock. This practice involves great waste, for the portions of the stock between the rims, and the circular disks cut from the centers of the rims, are

scrapped.

There is hardly any waste involved in the use of the present invention. Not sheet stock, but preferably cylindrical rods of the non-metallic material are employed. There is a further saving in labor and materials thus effected in that it is not necessary to smooth or round ofi the edges of the rims, as is the case with died-out stock. The rod is bent into the form of a ring 2, as shown in Fig. 1, and the ends 4 and 6 of the bent rod are joined together to form a continuous ring. The inner face of the ring is then grooved at 8 to provide the thus completed rim with a lens seat, or the rod may be initially grooved to'start with, before it is bent into, the ring form.

According to the preferred form of the present invention, shown in Figs. 1 and 2. the ends 4 and 6 of the rod are reduced in cross section at 10 and 12. the reduced ends are inserted into

recesses

14 and 16 of a nonmetallic ferrule 18, and the reduced ends are then cemented to the walls of the recesses. The ferrule 18 may convenientlv be made from a short non-metallic rod of the same substance and cross-sectional diameter as the rod 2, though of smaller length. the

recesses

14 and 16 being shaped to correspond to the shape of the reduced

ends

10 and 12. In the drawings, the shape is shown as conical. Of course, the ferrule 18 is bent to conform to the circumference of the completed rim. A rim so constructed has all the attributes of presentday rims of this character, except that it is very much cheaper.

The relative dimensions of the

rods

2 and 18 may be reversed, as shown in Fig. 3. In this figure, the ends of the rod 18 are reduced in cross section, and these reduced ends fit into correspondingly shaped recesses provided in. the ends of the rod 2.

The rims shown in Figs. 1, 2 and 3 are composed of two rods 2 and 1-8. A continuous rim may, however, be made from a single rod by recessing one end of the rod at 20, Fig. 4; reducing the cross section of the other end, as shown at 22, inserting the reduced end 22 in the recess 20, and cementing the reduced end to the walls of the recess. i

The ferrule 18, Figs. 1 and 2, need not necessarily be of the same diameter as the rod 2. In Fig. 5 is shown a. constructionin which the ferrule 24 is of larger cross sec:

tion. In that event, it will not be necessary to reduce the cross section of the ends 4 and 6 of the bent rod 2. The ends a and 6 may be inserted into

cylindrical recesses

26 and 28 and suitably cemented in place.

The non-metallic rimsare, of'course, intended to be secured to a nose bridge or to be pivoted to spectacle temples, or both. This is ordinarily effected by means of metal clamps that are secured to the ends of the bridge or to which the temples are pivoted. The clamps will naturally be positioned so as to clamp the joined-together ends of the ring. thus hiding the joints at the ends of the bent rod 2. Such a clamp may, furthermore, if suitably constructed, itself act as the medium for joining the ends of the bent rod 2 together. One such construction is illustrated in Figs. 6 and 7. In these figures, the ends 1 and 6 of the bent rod 2 are simply juxtaposed together, thougha layer of cement may, if desired, be placed at the dividing line between the ends t and 6. The ends t and 6 of the ring are provided with transverse corrugations 80, and the clamp 82 is similarly provided with trans verse corrugationsv34j, the corrugations provided upon the rod 2 to hold the parts together. Of course, the corrugations 30 might be provided upon the ferrule 18 or the ferrule 24:-

Other methods of joining the ends of the ring 2 together wit-h the aid of metal are illustrated in Figs. 8 to 11. According to the construction of Fig. 8,'thc ends 4; and (i of the rod 2 are provided with

transverse recesses

36 and 38, and alincd longitudinal recesses l0 and 4:2. The ends of a metal strip 44 are inserted through the

transverse recesses

36 and 38 until the body of the strip becomes seated in the alined

longitudinal recesses

40 and 42, and the

tips

46 and 48 of the strip are clinched. over against the rod 2, as shown.

A very effective construction is shown in Figs. 9 to 11. The ends of the rod 2 are provided with alined longitudinal, transversely corrugated recesses 50 and These recesses may be on the outer face of the rim, Fig. 9, or the inner face, Figs. 10 and 11. A transversely corrugated metal clamp 56 is inserted into the

alined recesses

50 and 52 to hold the ends of the rod together. The corrugations dovetail into one another in the same manner as described above in connection with the description of Fig. 6.

Many other modifications will occur to persons skilled in the art, and all such are intended to be embraced within the spirit and scope of the appended claims.

What is claimed as new is:

1. The method of making an article of the class described that comprises bending a zylonite rod into the form of a ring, inserting the ends of the rod in a zylonite ferrule, and cementing the ends of the rod to the ferrule to form a continuous ring.

2. The method of making an ophthalmic mounting that comprises bending a nonmetallic rod into the form of a ring, insertsaid end may enter the recess .in the firstnamed rod, inserting the reduced end in the recess, and integrally uniting the reduced" end to the walls of the recess.

4-. The method of making an ophthalmic mounting that comprises recessing theends of a short non-metallic rod, bending a second nonanetallic rod of diameter equal to the diameter of the first-nan1ed rod into the form of a ring, reducing the cross section of the ends of the second rod so that they may enter the recesses in the tirst-nan'ied rod, inserting the reduced ends in. the recesses, cementing the reduced ends to the walls of the recesses to form a continuous ring, and grooving the inner face of the ring to provide it with a lens seat.

5. An ophthalmic mounting comprising a non-metallic rod bent into the form of a ring, the ends of the rod being inserted in anon-metallic ferrule and cemented to the ferrule to form a continuous ring, the n'iounting being provided with a lens-receiving groove. 7

6. The method of making an ophthalmic mounting that comprises bending a zylonite member into the form of a ring, joining the ends of the member together with cement so as to form a continuous ring, and providing the inner face of the ring with a lens seat.

In testimony whereof, we have hereunto subscribed our names this 6th day of July,

FREDERICK A. STEVENS. JAMES V. lVELSH.