US339804A - Half to feank miller - Google Patents

Description

(No Model.)

G. NORWOOD. SPRING BENDING MAGEINE. No. 339,804. Patented Apr. 13, 1886.

wI/ Z 71/69-965 InvenZb-r $60 6 JVo rwoovz UNITED STATES PATENT OFFICE,

GEORGE NORNVOOD, OF BRIDGEPOR'I, CONNECTICUT, ASSIGNOR OF ONE HALF TO FRANK MILLER, OF SAME PLACE.

SPRING-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 389,804, dated April 13, 1886,

Application filed September 16; 1885. Serial No. 177,233. (No model.)

To all whomI it may concern.- U

Be it known that I, GEORGE NORWOOD, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and 'useful Improvements in Former-Bars for Spring Bending and Forming Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to makeand use the same.

My invention relates to certain novel and useful improvements in the construction of former-bars for spring bending and forming machines, and has for its object to provide an exceedingly light and serviceable bar for this purpose which shall be so arranged as to have aspring movement; and with these ends in view my invention consists in the details of construction and combination of elements hereinafter explained, and then specifically designated by the claims.

In order that those skilled in the art to which my invention appertains may fully understand its construction and operation, Iwill proceed to describe the same in detail, referring by letter to the accompanying drawings, formingapart of this specification, in which Figure 1 is an elevation showinga set of my improved former-bars in operative position, and Fig. 2 a section taken at the line as x of Fig. 1. r

Similar letters denote like parts in both the figures of the drawings.

Prior to my present invention various machines have been contrived in which formerbars were used; but a serious objection has been found to their usenamely, their great friction against each other and their want of antomatical adjustment to the shape of the pattern.

In my Patent No. 301,261, issued July 1, 1884, I described and claimed a certain style of former-bar; but experience has taught me that the lighter the .former-bar the less the friction would be and the more sensitive the bar would be to a spring adjustment.

In my present improvement I have shown a bar, A, open through the faces, as seen at B, and provided with a crosspicce, O, which serves as a brace to strengthen the bars. At the bottom isaspindle, D, secured to or formed integral with the bar.

In assembling my improved bars I place them side by side within a frame, so that their open faces will bein contact. The spindles extend downward within the frame of the machine, and coil-springs E are placed around the spindles and confined between the body of the bars and washers F, at the lower extremities of the spindles' It will be readily understood that the bars come in contact with each other only at the outside edges of their faces, and the friction is therefore reduced to a minimum.

The bars are exceedingly sensitive to downward pressure. and readily adjust themselves to the shape ofthe pattern G, asshownin Fig. 1. They are strong and durable, and exceedingly economical as compared with the bars shown in my aforesaid patent.

Having thus described my invention, what I claim as new and useful is 1. In a spring bending and forming machine, the forlner-bars having openings extending transversely through their bodies and provided with downwardly-projecting spindles, substantially as shown and described.

2. In a spring bending and forming machine, springactuated former-bars having contact with each other only at the outside edges of their faces, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE NORIVOOD.

W'itnesses:

EDWARD F. MEEKER, W. T. HAVILAND.

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