US437121A

US437121A - Eyeglasses

Info

Publication number: US437121A
Authority: US
Publication date: 1890-09-23
Anticipated expiration: 1907-09-23

Description

(No Model.)

J. KING. BYBGLASSES.

10.437,121. -Pmntedsepn 2s, 1890.

UNITED STATES PATENT OFFICE.

JULIUS KING, OF CLEVELAND, OHIO.

j EYEGLASSES.

SPECIFICATION forming part of Letters Patent No. 437,121, dated September 23, 1890.

Application filed March 7, 1890. Serial No. 342,990. (No model.)

.To all whom it may concern.-

Beit known that I, JULrUs KTNG, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio,

5 have invented certain new and useful Improvements in Eyeglasses, of which the tollowing, with the accompanying drawings, is a speciiication.

My invention relates to certain new and Io useful'improvements in eyeglasses.

The invention has for its object the attainment of pupillary adjustment of the lensframes of any and all styles of eyeglasses, whereby the glasses may be adjusted at any i 5 desired distance apart and secured to such adjusted position against accidental displacement through the medium of enforced frictional contact between the overlapping springs. Y

zo The invention consists in the peculiar construction,arrangement, and combinations of the various parts, all as more fully hereinafter described, and pointed out in the claims.

Figure lis an elevation of a pair of eyez 5 glasses provided with my improved adjusting mechanism. Fig. 2 is a cross-section on the line c, Fig. 1. Fig. Sis an enlarged per- I spective ofthe overlapping springs detached and showing the locking-cam. Fi g. 4 is a plan 3o of the blanks from which the springs are formed. Fig. 5 is a plan; and Fig. 6 is a vertical longitudinal section of the same, showing a modified form of springs and means of locking same.

3 5 In the accompanying drawings, which form a part of this specification, A A represent the lens-frames of a pair of eyeglasses, and may be of any desired form or material. Each of these frames is provided with a post B, to which the ends of the springs C are rigidly secured in any proper and convenient manner.

The above description will apply to any class of eyeglasses which are secured together with a single spring.

My invention consists in connecting the lens-frames together through the medium of two springs a and b, one end of each of which is rigidly secured to its respective post B of the frames A. The free end of the spring 5o a is provided with the guides c and ears d,

which are formed integrally with the spring,

as shown in Fig. 4, while the free end of the spring b is provided with the laterally-proj ecting arms e, which are designed to be bent over and embrace the edges of the spring a. Between the ears d is fulcrumed a cam-lever D, adapted to clamp the two springs a and b together.

It will readily be seen that by the employment of a spring constructed substantially as 6o above described the lens-frames can easily be adjusted to the eyes of the purchaser, the pupillary distance being obtained by sliding the springs over each other, as the case may require, so as to bring the lens-frames the required distance apart, when the cam-lever is then turned down to clamp the springs together, and thus retain the frames to their adjusted positions against accidental displacement. 7o

In Figs. 5 and 6 I show a modiiication of the above construction, which modification consists of a slide adapted to receive the free ends of the springs a and b, each of which is provided with a detent h, adapted to engage with one of a series ,of holes t', formed in the bottom of the slide. In this construction the pupillary distance can readily be obtained by engaging the detents to or from thelongitudinal center of the slide, as the case may de- 8o mand.

I am aware that various devices have been invented and patented with a view of obtaining the adjustment sought in the present invention, such as double springs, compensating nose-springs, and others; but in all of the constructions of which I have any knowledge the desired end has not been obtained.

What I claim at my invention isl. In eyeglasses, the combination of the two 9o overlapping springs adapted to slide upon each other with a cam-lever secured to one of said springs and adapted to clamp the springs into close frictional contact with each other, substantially as described.

2. In combination, a spring for eyeglasses, consisting of the two separate springs of, and l?, the former of which is provided with the guides c and ears d, acam-lever D,fulcrumed between said ears d, and the spring b, adapted Ioo to slide upon the spring a beneath the said presence of two witnesses, this 27th day of emu-lever D, its free end being provided with Februzn'y, 1890. arms e, adapted to embrace Jshe edges of the T i sp1-ing` a, the parts being constructed, zu'- JULIUS KIL G' 5 ranged, and operating in the nimmer and for Witnesses:

the purposes set forth. II. L. XVARREN, In testimony whereoflafx my signature,in II. S. SPRAGUE.