US2135791A

US2135791A - Ophthalmic mounting

Info

Publication number: US2135791A
Authority: US
Publication date: 1938-11-08
Anticipated expiration: 1955-11-08

Description

Filed March 2?', 1936 SAMUEL E. BOUCHARD' INVENTOR ATTOR l-:Ys

Patented Nov. 8, 1938 VOPHTHALMIC MOUNTING Samuel E. Bouchard, Rochester, N. Y., assignor to Bausch & Lomb Optical Company, Rochester, N. Y., a corporation of New York Application March 27, 1936, Serial No. 71,203

The present invention relates to ophthalmic 4 Claims.

mountings and more particularly to mountings which are attached to lenses to provide rimless spectacles.

One of the objects of this invention is to provide an improved ophthalmic mounting. Another object is to provide an improved ophthalmic mounting having a lug for engaging in a notch in the edge of the lens.

A further object is to provide an ophthalmic mounting havinga lug which lexactly ts a notch in the edge of the lens.

Still another object is to provide an oph- Fig.

1 is a fragmentary view of a rimless mounting embodying this invention.

Fig. Fig.

2 is a horizontal section of same. 3 is a vertical section of same showing an ideal condition.

Fig.

4 is a vertical section similar to Fig. 3

showing the ordinary condition.

Fig.

5 is a plan view of a blank from which the strap shown in Figs.v 1 to 4 is made.

Fig. Fig.

6 is a vertical section of a modification. 7 is a plan View of a blank from which the strap shown in Fig. 6 is made.

One embodiment of the present invention is illustrated in Figs. 1 to 5 wherein IU indicates generally a member having two spaced lens straps II and I2 connected by a neck portion I3. The strap Il is provided with an undercut recess I4 and the strap I2 is provided with a countersunk aperture I5 both of which are adapted to register with an opening I'I adjacent the edge of the lens I6. The straps II and I2 are also'provided with grooves I8 and I9, respectively, vwhich extend from the recess I4 to the neck portion I3 and from the aperture I5 to the neck portion I3, respectively.

The mounting is placed on the lens I 6 with the straps I I and I2 engaging the opposite surfaces thereof and a fusible element 20 is introduced through the aperture I5 and softened so that it fills the recess I4, opening I'I and grooves I8 and I9 and the aperture is then closed with a plug 2I which is embedded in the fusible element.

material of a softening point sufficiently low that the heat necessary for softening will be insufficient to affect either the lens or the mounting. Either a fusible non-metallic material or a metallic alloy of low melting point can be used.

In order to avoid the necessity of the conventional shoe, the neck portion I3 is formed with a convex lug 22 which engages in a notch 23 in the edge of the lens I6. In the ideal form, as shown in Figs. 2 and 3, the lug 22 i'lts exactly in the notch 23 and the fusible element 2I serves simply to secure the mounting to the lens. However, this ideal is almost impossible to attain.

The more usual condition is that shown in Fig. 4 where the lug 22 does not exactly fit the notch 23. In this usual condition there will be a space between the lug 22 and the edge of the notch and this space would result in either a loose mounting or a strained lens. Such a diiculty is cured in the present invention by using the fusible retaining element 20 and providing the grooves I8 and I9. When the fusible element 2) is softened, it will flow along the grooves I8 and I9 and ll any space between the lug 22 and notch 23 as shown in Fig. 4, and thus insure an exact fit and a tight mounting.

. In the modification shown in Figs. 6 and 7, a groove 24 is formed in the surface of the lug 22 and the fusible material 20 will flow along the grooves I8 and I9 and i'lll the groove 24. Thus, in this form, the fusible element 25J will always extend between the lug 22 and the notch 23 to insure an exact t.

From the foregoing it will be apparent that I am able to attain the objects of my invention and provide an ophthalmic mounting having a lug exactly fitting a notch in the edge of the lens in place of the conventional shoe. Various modications can, of course, be made without departing from the spirit of my invention or the scope of the appended claims.

I claim:

1. An ophthalmic mounting comprising a pair of projections positioned on the opposite faces of a lens having an opening spaced from its edge, anchoring means on each of said projections opposite said opening, said projections being connected by a neck portion at the edge of the lens, each of said projections having a groove extending from the anchoring means to the neck portion, the' edge of the lens having a notch spaced from the opening, said neck portion having a part projecting into and partially filling said notch and a fusible element secured to said anchoring means and having a part lling said opening and a part filling the remaining space in the notch.

2. An ophthalmic mounting comprising a pair of spaced straps positioned on the opposite faces of a lens having an opening and a notch adjacent said opening, anchoring means on said straps opposite said opening, said straps being connected by a neck portion having a part projecting into said notch, said strap and part having a groove extending between said anchoring means and across said part, and a fusible element connecting said anchoring means and substantially lling said opening and said groove.

3. An ophthalmic mounting comprising a member having two spaced straps positioned respectively, on opposite sides of a lens having an opening adjacent one edge and anotch in the edge adjacent the opening, anchoring means on each strap opposite the opening, means connecting said straps beyond the edge of the lens, a lu'g on said connecting means adapted to extend into and partially ll said notch, a groove in each strap extending from said anchoring means to said lug and an integral mass of fusible material secured to said anchoring means, and extending through said opening and along said grooves and into said notch.

4. An ophthalmic mounting comprising a member having two spaced straps positioned, respectively, on opposite sides of a lens having an opening adjacent one edge and a notch in the edge adjacent the opening, anchoring means on each strap opposite the opening, means connecting said straps beyond the edge of the lens, a lug on said connecting means adapted to eX- tend into said notch, a groove in each strap extending from said anchoring means to said lug, a groove in said lug connecting the other two grooves, and an integral mass of fusible material connecting said anchoring means and extending along said grooves.

SAMUEL E. BOUCHARD.