US1094512A - Eyeglass-mounting. - Google Patents

Description

G. A. BADER.

BYEGLASS MOUNTING.

APPLIUATION FILED AUG. 7, 1912.

GUSTAV A. BADER, F ROCHESTER, NEW YORV EYEGLASS-MOUNTING.

' Specification of Letters Patent.

Patented Apr. 28, 1914.

Application iled August 7, 1912. Serial No. 713,939.

To all whom it may concern Be it known that I, GUsTAv A. BADER, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Eyeglass-Mountings, of which the following is a specification.

This invention relates to eyeglass-mountings of the type in which the nose-guards or clamps are 'carried by levers, which are pivoted to the body of the mounting and controlled by linger-pieces and springs.

The principal object of the invention is to produce a1i,eye"glassmo11nti1ig of the type in question in which the springs,by which the nose-'clamp levers are controlled, are so supported and mounted as to reduce the friction between these springs and their supporting-devices, while at the same time the springs are securely held in place when in use and are readily removable and replaceable for the purpose of adjustment or replacement.

Another object of the invention is to produce a construction in which the pivotal bearings of the nose-clamp levers are so formed as to diminish the friction and wear incident to the movements of the levers.

To the foregoing ends I employ a construct-ion in'which the nose-clamp springs have coiled portions which are supported b v members projecting in line with the pivotal axes of the nose-clamp levers, these members being freely rotatable so as to turn when the levers are swung about their pivots, thus diminishing the friction between the springsupports and the coils of the springs due to the movement of the spring-coils.

Other features of the invention will be set forth in .connection with-the following description of the illustrated embodiment thereof.

In the drawings: Figure 'l is a plan-view, on a greatly enlarged scale, of a portion of an eyeglass-mounting embodying the present invention; and Fig. 2 is a rear-elevation,l in section on the line 2-2 in Fig. 1.

The invention is illustrated as embodied in an eyeglass mounting in which the lens-clips, by which the lens 4 is supported,ltherigid yoke or bridge 5, and the'body-portion 6 which connects the lens-clipsand the bridge, are of ordinary form and construction. The

bod 7-portion t has a fiat upper `surface upon which the nose-clamp lever 7' has a bearing in the usual manner. The lever T may ha.e any ordmary or suitable general forni, and it Vis provided, at its` rear-end, wit-h the usual nose-clamp S. while its forward extremity constitutes a finger-piece Sl for actuating the lever.

The novel features of the present inventionreside in the form and arrangement of the means for pivoting the nose-clamp levers and for supporting the springs by which the nose-clamp levers are controlled. A pivotscrew 1l is threaded into each body-portion 6, and this pivot is surrounded by a bearingsleeve 10 which is free to turn upon the pivot. The upper end of the sleeve is engaged by the head of the screw, while the lower end engages the upper surface of the body 6, and to confine the sleeve against endwise motion the screw is driven into the body-portion until there is. no superfluous' looseness, and is then fixed in this position by upsetting the lower end of the screw as vshown in Fig. 2. The nose-clamp lever does not directly engage the pivot, but is perforated to receive the lower end of the sleeve 10, and this end is reduced in diameter so as to form a shoulder, which bears upon the upper surface of the lever. The lever is thus "pivoted upon the sleeve, while being free to turn with respect to the latter, and the shoulder confines the lever closely against the upper surface of the body-portion 6, thus restricting the lever to pivotal movements about the axis of the pivot 11, or in a horizontal plane. The sleeve l0 constitutes the support. for the nose-clamp spring. This spring is provided with a helical coiled portion 12, which surrounds the sleeve, and at the upper end of the coiled portion the spring terminates in a straight arm 13 which engages the rear-portion of the noseclamp lever, as shown in Fig. l. The lower extremity of the spring has the form 4of a hook 14, which passes around and under the bodyportion, thus normally retaining the spring against either rotation or longitudinal movement on its support.

To prevent the upper coils of the spring from becoming accidentally disengaged from the upper end of the support, the sleeve 10 is provided, at its upper end, with an enlargedv head or flange l5. When the spring is in use the eii'ect of its torsion, as transmitted through the extremities 13 and 1 4, causes the spring-coils to be forced latera-ily into engagement with one side of the lll) support. By this action the uppermost coil is held beneath or interloclred with the iiange l5, as shown in Fig. The coiled portion of the spring is preferably made of such size, however, that when the spring is relieved of torsion by the disengagement of the arm 13 from the nose-clamp lever, the coils may be passed easily over the iange 15, so that the spring may be readily removed and replaced when necessary without disassembling the mountingby the removal of the pivot-screw.

ln mountings of the ordinary form, in which the spring-support is stationary, the torsional action of the spring, when the nose-clamps are swung away from each other by the manipulation of the fingerpieces. causes the spring-oils to press and bind against the support. and the friction thus produced results eventually in wear upon the spring and upon the support, and also interferes to some extent with the eHective operation of the springsI upon the le-` vers. In the present construction, however, the use of the freely-rotatable sleeve l0 eliminates, or largely diminishes, the binding of the spring7 since this sleeve, when subjected to any substantial friction by the spring, will rotate With the coils of the spring. The sleeve also diminishes the friction against the lever 'at its pivotal bearing, since it turns in' the same direction as the lever, and if at anytime the friction between the lever and the sleeve is greater than that between the sleeve and the spring,

the sleeve will turn in unison with the le ver, while, on the other hand, if the friction between the sleeve and the spring becomes greater than that between the sleeve and the lever, the sleeve will accommodate its movements -to those of the spring. The

matically diminishing friction in the mechanism .wherever it would otherwise be greatest,` and this greatly diminishes the Wear upon the mechanism and distributes such wear asis not entirely eliminated in such a manner as to prevent the occurrence of substantial looseness in any part of the mechanism.

l Claimr- .Xn eye-glass mounting having. in combination, a fixed portion comprising a body with a pivot projecting therefrom, a ysleeve embracing and freely rotatable upon.` the pivot and having its end adjacent'the body reduced in diameter so as to form a shoulder, a nose-clamp lever seated against the -sleeve thus constitutes a device for autobodyY and loosely embracing said reduced portion, said lever beingheld against the bodv bv said shoulder. and a s rin@ comprising a lzelical coiled portion surrounding said sleeve 'above the nose-clamp lever, and extremitiesengaging. respectively, the fixed portion of i he mountingand the nose-clamp lever.

GUSTAV A. BADER. litnesses D.. GURXEE, (l. S.DAv1s.

Copies of this patent 'may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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