US729464A - Eyeglass-spring. - Google Patents

Description

No. 729,464. PATENTED MAY 26, 1903.

' G. W. WELLS.

EYEGLASS SPRING.

APPLICATION FILED JAN. 20, 1903.

, Q W M UNITED, STATES Patented May 26, 1903.

GEORGE W. WELLS, OF SOUTHBRIDGE, MASSACHUSETTS.

EYEG,l ASS-SPR|NG.

srnorrroa'rron forming part e f Letters Patent no. 729,464, dated May 26, 1903.

' Application filed January 20.1903. Serial No. 139,840- (N mod m T all whom it may concern:

Be it known that I, GEORGE W. WELLs, a citizen of the United States, residing at Sou thbridge, in the county of Worcester and State of Massachusetts, have invented certain new and usefulImprovementsinEyeglass-Springs, of which the following is a specification.

My invention relates to eyeglass-springs made of fiat metal; and the object of my invention is to make an improved eyeglassspring of reduced width through the central portion andwith widened ends to fill the recess in the head of the eyeglass-post.

In making my improved eyeglass-spring I preferably take a strip of narrow flat metal and cut it into blanks of the desired length and of such a width at the ends that when the ends are bent edgewise to extend alongside of and contiguous to the main part of the strip the width of the bent ends will nearly fill therecess in the head of the eyeglass-post. I bend the extreme ends edgewise on the same 7 side of the strip to cause them'to extend alongside of and substantially parallel to the main body of the strip. The bending 'of the ends makes the metal a little thicker at the bent portion, and the bent ends are placed in a die orholder of proper shape and hammered or swaged to flatten the ends to make them the proper width, so that they will substantially fill the recess in the head of the eyeglass-post.

The amount of the. flatteningof the ends is controlled by the size of the die. The free end of the bent portion is left disconnected from the main portion, leaving the ends partially slit centrally. A hole is drilled or punched in the widened ends for the hold ing-screw.

My invention consists in certain novel features of construction of my improvements in eyeglass-springs of fiat metal, as will be hereinafter fully described.

Referring to the drawings, Figure l is a front perspective view of an eyeglass-spring embodying my improvements. Fig. 2 is a detached end view looking in the direction of arrow a, Fig. 1. Fig. 3 shows a fiat strip of metal or a blank from which the spring is made. Fig. 4 shows the blank in Fig. 3 with the ends bent edgewise to make them wider,

andFig. 5 shows the blank in Fig. 4 after the holes are punched in the widened ends.

In the accompanying drawings, 1 is a blank or strip of fiat metal of the desired length and width from which my spring is made. Each end of the blank 1 is bent edgewise on the same side of the blank, as shown in Fig. 4, thus doubling the width of the blank at its attaching ends. The double width of the blank at its ends makes it wide enough to substantially, fill the recess in thepost of the eyeglass. The bent ends 1 of the blank 1 are then preferablyhammered or swaged to compress and flatten the metal and cause the ends to closely fill the recess in the eyeglasspost and prevent their working from side to side. In hammering or swaging the bent ends 1' they are placed in a die or holder of suitable shape and size. The swaging of the bent ends 1 does not close the slit or opening between thebent ends and the main part of the blank, so that the bent ends may and will have atendency to spring out or move away slightly from the main part of the blank, and thus tend to keep the ends of the eyeglassspring tight in the post. A hole or perforation 2 is punched in the bent ends 1 of the blank, as shown in Fig. 5, and then the blank is bent into the form of the finished spring, as shown in Fig. 1.

I am aware that it is not new to enlarge or .widen the attaching end of a flat eyeglassspring by stamping or cutting the blank of narrower width between the attaching ends; but I am not aware that prior to my invention the enlarged or widened ends of a fiat eyeglass-spring have been made from ablank by turning or bending the ends of the blank edgewise to doublethe width of the blank at its ends with the additional width all on one side or edge of the blank.

In my improved construction of eyeglasssprings with widened attaching ends narrower strips of metal can be used and there is no loss of material, as in the ordinary construction above referred to, in which the blank is trimmed or cut on each edge between its ends to leave the widened ends with each edge of the ends extending beyond the edges of the main portion of the spring.

I have used the term eyeglass-spring; but it will understood I intend to include herein what are also termed bridges, bridge-pieces, or bows of eyeglasses and spectacles.

It will be understood that the details of construction of myimproved eyeglass-spring may be varied, if desired.

I have used the words flat metal, but I intend to include under said words flattened metal or oval shape in cross-section or partially cylindrical shape.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An improved article of manufacture, an eyeglass spring or bridge, of flat metal, having its ends widened by bending the ends edgewise to extend substantially parallel and described.

GEORGE W. WELLS.

Witnesses:

J. C. WELLS, M. HAAS.

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