US2020265A - Ophthalmic mounting - Google Patents

Description

Nov. 5, 1935. T. G. SADLER 6 7 OPHTHALMIC MOUNTING A Filedpct. 16, 1955 IN V EN TOR.

A TTORNEYS.

Patented Nov, 5, 1935 ATE'NT OFFICE OPHTHALMIC MOUNTING Thomas G. Sadler, South Attleboro, Mass, as-

signor-to Sadler Bros, Inc., a corporation of Massachusetts Application October 16, 1933, Serial No. 693,790 Claims. (01. 88-49) This invention relates to an ophthalmic mounting more particularly the nose pad which rests against the nose of the wearer when the mounting is in working position.

"5 An object of this invention is to provide a nose pad which will be prevented from turning to such an extent about its mounting as an axis as will be detrimental and undesirable in its use.

Another object of the invention is to so arrange interengaging stud and recess parts of the pad and its mounting arm that a broad bearing surface will be present for the support of these members, particularly against a twisting movement.

Another object of the invention is the provision of anopening in the mounting arm, and a stud 'in the pad of such relative shape that the size of the opening in'the arm may be increased'without weakening the arm to permit of a larger sized stud'being used than has heretofore been usual in the trade.

Another object of the invention is the provision of a pad stud, thetools of which may be more easily formed than for rectangular studs which have heretofore been common.

7 Another object of the invention is the provision of a pad having a stud of such shape that there Will be metal-tometal engaging surfaces of the mounting parts which support the pad in position.

A further object of the invention is the provision of a stud having metallic contact of its mounting parts with the metal substantially in the plane of the non-metallic covering for the metallic base which supports the stud.

. With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described, and

particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is aperspective view illustrating the fragmental parts of an ophthalmic mounting,

V and. showing my improved part and its mounting in position thereon. a

Fig. 2 is a plan view of the pad and its arm.

. Fig. 3 is a side elevation of the'pad and arm illustrating in dotted lines the relative movement permitted between the padancl arm. I

r Fig. 4 shows a pad and arm with'the stud in section, the same being out just below theenlarged head thereof.

' Figs. 5, 6 and 7 are perspective views illustrating various steps in the operation of forming the metallic core comprising a base and stud over .which the non-metallic padiis secured.

Fig. 8 is a perspective view of the arm.

Fig. 9 is an enlarged view similar to Fig. 4, showing the fragmental parts of the pad and arm.

Fig. 10 is a sectional view on line l0-l0 of '5 Fig. 2. 7

Figs. 11 and 12 are perspective views of modified forms of studs.

Fig. 13 is a perspective view of a modified form .of core. 10

Fig. 14 is a perspective view of another modification of core.

In the use of nose pads for ophthalmic mountings, it is desirable that some rocking motion be permitted that the nose pad may adjust itself 15 to the face of the wearer.

Nose pad mountings are frequently provided with a rectangular stud and a rectangular opening to receive this stud and during wear the corners of such a stud at the points of contact 20 with the edges of the opening present the minimum amount of bearing surface and become quickly worn, the opening becomes enlarged and either a complete rotation or a partial rotation may occur between the pad and its arm to such an 25 extent that the pad does not maintain its position which is of annoyance to the wearer; and in order that this undesirable result may be avoided, I have arranged a stud and. an opening in the arm to receive it, such that an in- 30 creased bearing surface is provided and one by which this excessive wear whichpermits rotation is prevented and in so doing I have also provided a metal contact at the base of this stud between it and the supporting arm which better 35 resists wear and also corrosion at this juncture of the parts and in sodilferently shaping the stud and its receiving opening I have provided a shape which enables a great saving'in the cost of profollowing is a detailed description of the present embodiment of this invention illustrating the 45 preferred means by which these advantageous results may be accomplished:-

' With reference to the drawing, l0 designates, generally, the covered nose pad and the supporting arm. This nose pad consists of a inetal- 50 lic core l2 and a non-metallic covering l3 thereover.

This core I2 is shown in finished form in Fig. 7,

and comprises a base l4 and a stud l5 projecting therefrom, which stud at its juncture with the 55 base is formed with a step or enlarged portion 16, forming a bearing surface for the arm, as will be more fully hereinafter described. The core is struck up from wire or solid stock in three operations; the first operation is illustrated in Fig. 5, in which the base I! is formed with a bulge l8 thru its center at a point from which the stud I5 projects. The parts are next formed into the shape desired, as shown in Fig. 6, where the base is flattened and the stock flows to the finished shape with the step l6 formed therein, with the exception of trimming of the base 20 which is shown of some irregular or enlarged shape. In the next operation the base is trimmed, as illustrated in Fig. 7 at I4, and the .core completed.

This base I4 is covered with a non-metallic covering l3, such as celluloid which may be molded or formed in parts over the front and rear faces of the base l4 with the covering for the rear face abutting the edges 2] of the step l6 and lying flush with the rear surface thereof, as shown in Fig. 10 and closely conforming to the step with the celluloid of a thickness substantially that of the step, thus leavinga substantial metal surface exposed for the contact of the operating arm.

The supporting arm It consists of a shank portion 25 provided with a spoon-shaped end 26 which is provided with an opening 21 therein shaped in conformity with the shape of the stud I5. This stud and opening 21 are shaped to present a broad bearing surface between these parts andfor convenience of illustration, I have shown this shape as consisting of two intersecting circles 28 and 29, see particularly Fig. 9, providing a common cord of substantial extent at 30 and thus a stud, the cross section of which is generally in the form of the figure 8 having substantial width at the restricted portion 3|. By this arrangement, the receiving means in the spoon are curved at their opposite longitudinal ends 32 and 33 and a bearing such as shown in Fig. 9 intermediate these ends is produced which is of a substantial extent extending from a point diametrically across the circle 28 to a point diametrically across the circle 29 and by reason of the restricting of this opening and the shape of the stud these parts fit very closely together altho permitting a rocking movement longitudinally of the parts, as illustrated in Fig. 3, and also permitting a lateral rock at the points 34 due to the play between the edges of the opening in the supporting arm and the stud. By the provision of an opening andstud of this shape, this increased bearing surface will prevent any appreciable wear, whereby the pad is prevented from being worn so that it may be rotated with reference to the arm. Further, by reason of the curved ends of the opening in the spoon, the opening conforms more closely to the shape of the spoon and thus a larger opening may be provided than where angular corners are used and yet obtain the same margin of safety of the surrounding stock. Thus a larger stud may be used.

These parts are of such shape that an easy tool job is provided. It is merely necessary in forming the dies for these parts to drill two holes at such points that their peripheries will intersect. It is not necessary to work out the corners as is necessary-in the tools for the rectangularly shaped plug and opening. V

In Figs. 11 and 12, I have illustrated a modification in which instead of forming the stud in one solid piece, it is formed in two parts 35 and 36 by setting the drill openings for the die slightly apart, Whereas in Fig. 12 where the stud parts are shown similar to Fig. 11 the portions 31 and 38 are connected by a neck 39, in each of which 5 instances it willbe observed that the increased bearing surfaces and the wear which permits rotation is prevented by reason of the restricted opening in the arm between these ends and in the showing of Fig. 11 this stock may extend com- 10 pletely across and may divide the opening into two parts if desired.

In each of the showings, I have illustrated the elongated dimension of the stud, whether solid or composed of several parts, as extending 15 lengthwise of the pad and lengthwise of the arm in which it is mounted, which permits of the maximum rocking in a longitudinal direction which is desirable in use.

Also, by the provision of the enlargement I6 20 at the base of the stud, which is left exposed by the non-metallic covering, the curved surface of the spoon will engage this surface to rock thereon and provide a metal-to-metal bearing' In Figure 13, however, I have shown the longi- 25 tudinal dimension of the stud 40' as extending across the core, which is sometimes desirable where an arm of differently bent contour is to be used than that shown in Fig. 1. In this case,

of course, the maximum rock will be at right an- 30 gles to the length of the pad. In this modification, I have also omitted the step and left a fiat base 4| over which the celluloid will extend and come into contact with the stud.

In Figure 14, I have shown a further modified 35 form of core for a pad. In this showing a piece that should the center bearing part become worn then the opposite edges may be forced toward each other by pressure to take up this wearing of the parts.

It will, of course, be understood that this pad may be used in the metal with or without a covering thereover.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. In an ophthalmic mounting, a nose pad provided with projecting means extending therefrom having a longitudinal dimension in excess of its lateral dimension, a supporting arm provided with means comprising an elongated opening for receiving said projecting means, said projecting and receiving means being formed to provide a bearing surface between and spaced from the ends of said longitudinal dimension of said projecting means and spaced from the opposite longitudinal ends of said opening.

2. In an ophthalmic mounting, a nose pad provided witha stud projecting therefrom, a supporting arm having an opening to receive said stud, said'opening being elongated and restrict- 76 ed intermediate its ends and said stud being of corresponding Iorm, whereby a broad. bearing surface between said stud and opening between their ends is provided.

3. In an ophthalmic mounting, a nose pad provided with a stud projecting therefrom, a supporting. arm having an opening disposed longitudinally of the arm to receive said stud, said opening being curved at its ends and restricted intermediate its ends and said stud being of substantially corresponding shape, whereby a broad bearing surface between said stud and opening between their ends is provided.

4. In an ophthalmic mounting, a nose pad. provided with a stud projecting therefrom, a supporting arm having an opening to receive said stud, said opening being elongated in the direction of length of said am curved at its ends on the arc of a circle, and restricted intermediate its ends and said stud being of corresponding shape, whereby a broad bearing surface between said stud and. opening is provided at points spaced from the ends of said stud.

5. In an ophthalmic mounting, a nose pad provided with a stud projecting therefrom, a supporting arm having an opening to receive said stud, said opening and the stud received therein being substantially the shape formed by two adjacent circles of similar diameters with a portion of a width less than the diameter of the circles connecting them.

THOMAS G. SADLER.

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