US1643909A - Ophthalmic mounting and method - Google Patents

Description

F. A. STEVENS ET AL Sept. 27, 1927. I I 1,643,909

OPHTHALMIC MOUNTING AND METHOD Filed Aug. 21, 1922 Z 72 veni'oraf- Patented Sept. 27, 1927.

.uairsn STATES PATENT OFFICE.

FREDERICK A. STEVENS AND JAMES VJ.

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OPHTHALMIC MOUNTING AND METHOD.

Application filed August 21, 1922. Serial No. 583,253.

The present invention relates to ophthalmic mountings, and the object of the invention is to improveupon present-day connections between the bodies. of such mountings and posts, dowels and the like that are se= cured thereto. The present application is a continuation in part of copending application, Serial No. 379,788, filed May 8, 1920, which matured on December 30, 1924, into Patent 150. 1,521,484.

The posts about which the guard levers of linger piece eyeglasses are pivoted, the posts or dowels about which spectacle temples are pivoted, and posts used for other like purposes in ophthalmic mountings, are usnall intended to be rigidly secured to their supports. The desired rigid connection is not often satisfactorily attained in practice.

The dowels that are provided upon temple.

end pieces, for example, usually constructed, are so insecurely mounted that a comparatively small force exerted upon their free ends is sufficient to drive them through their supporting end pieces. It has been suggested to form the posts integral with their mountii'igs, but this introduces dilliculties in manufacture that have caused the s gestion to meet with disfavor. The ternsl portion of the post is frequently hammered or riveted over to secure the post in place. l'lammcring riveting processes, however, introduce an iuiattractive appearance that repels purchasers, and the hamme ed or riveted joint, furthermore, has a tendency to work loose.

According to the present invention, the mounting is provided with a bore and the post is provided with a head that is mounted in the bore, the material near the wall of the bore being swaged against the head of the post to secure it in place. The bore need extend from one face of the mounting but part way to the opposite face, greatly improving the appearance.

The invention consists of the improved ophthalmic mounting hereinafter described, illustrated in the accompanying drawings, and defined in the appended claims. It will now be described in connection with the accompanying drawings, in which Fig. 1 is a fragmentary perspective View of a fingerpiece eyeglass mounting constructed according to a preferred embodiment of the present invention; Figs. 2, 3, 4 and 5 are longitudiv nal, sections of modifications; Fig. 6 is a plan 5 applicable to. mountings thistype in s which the post 10 is rigidly secured. to the support 4.

According to. the preferred construction, illustrated in 1, the support 4 is initially provided with a polygonal bore 201 that GX- tends from one face 2-2 of the support but part way to. the opposite face 24. The post 10 is. provided with a similarly polygonal head 26. The head 26 is seated in the bore 20, after which the material. near the walls of the. here is swaged over against the head and thebody of the post. A very rigid con nection is the result.

. As shown in Figs. 2, 3 and 4, the neck 28 between the head: 26 and the body of the post may be reduced in cross section, providing a channel within which the swaged material of the support may be forced. The surface of the neck 28may be tapering, Fig. 2, cylindrical, Fig. 3, rounded, Fig. 4, or of any other desired conformation.

A somewhat different construction is shown in Figs. 5 and 6. The enlarged head 30 seats upon a shoulder 32 of a countersunk bore 34 formed in the support 4, the larger dimensions of the bore being equal to the dimensions of the enlarged head. The bore 34 extends through from the face 22 to the opposite face 24. The head is provided intermediate of the post 36, the portion 38 of the post on the otherside of the head extending through the bore to the face 24, where it is riveted over at 40. This construction is not so attractive as the others above described because of the riveted-over portion 40 of the post, but the polygonal shape of the head 30 and of the corresponding portion of the bore 34 render the structure very effective inuse.

The dowel or post 42 about which the temple 4.4 is pivoted ismounted upon the temple end piece 46 very much as the post 10 is mounted upon the suppo t 4 of Fig. 1.

The cylindrical bore 48 in the other end piece 50, like the polygonal bore 20 in the end piece 46, extends but part way through the end piece 50. When, therefore, the end pieces are secured together, with the temple in place between them, as shown in Fig. 7, no sign of the dowel is anywhere visible, the outer faces of the end pieces being thus ren dered smooth and attractive. The elimination of the customary rings from the outer faces of the end pieces furthermore provides one less dirt-collecting agency upon the temple mounting.

In the construction of Fi g. 8, the enlarged head 52 seats upon the shoulder 54 of a countersunk bore 56 formed in the end piece 46, the larger diameter of the bore being equal to the diameter of the enlarged head. The material near the wall of the bore is then swaged in against the head and that portion of the body of the dowel that is mounted'in the bore, as shown at 58, thus securing the dowel firmly in place. The engagement of the head 52 with the shoulder 54: effectually prevents the terminal portion 60 of the dowel, which lies in the reduced portion of the bore, from being forced through the face 24 of the end piece.

Though the drawings show the invention in its preferred embodiment, it will be understood that this is for illustrative purposes purely and that the invention is not re stricted thereto, but is of broad scope, unlimited except in so far as limitations may be specifically imposed in the appended claims.

What is claimed as new is:

1. An ophthalmic mounting having a polygonal bore extending from one facepart way to the opposite face, and a post having a similarly polygonal head permanently se- 7 cured in the bore.

2. An ophthalmic mounting having a polygonal bore extending from one face part way to the opposite face, and a post having an enlarged polygonal head and a portion of its body permanently secured in the bore,

countersunk bore extending from one'face part way to the opposite face, and a post secured in the bore having an enlarged head. in the enlarged portion of the bore and a portion in the remaining portion of the bore.

a. An ophthalmic mounting having a bore extending from one face part way to the opposite face, and a post in the bore having means for preventing its becoming loosened from the bore.

5. The method of making an ophthalmic mounting that comprises providing a mounting with a polygonal bore that extends from one face of the mounting part wayv to the opposite face, inserting in the bore a post having a polygonal head with the polygonal" head in the bore, and swaging the material of the mounting against the head and the body of the post.

In testimony whereof, we have hereunto subscribed our names this 15th day of August, 1922.

FREDERICK A. STEVENS. JAMES l/V. WELSH.

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