US339803A - Half to feank millee - Google Patents

Description

G. NORWOOD.

SPRING BENDING MACHINE;

2 Sheets-Sheet 1.

(No Model.)

- Pa 1;.ented Apr. 13, 1886.

@323 .EFEE E Wzineapea Geo a nrwoo 0i N. PETERS Phowlilhognpher. Withinmlm. D. C.

2 Sheets-Sheet 2.

(No Model G. NORWOOD. SPRING BENDI NG MACHINE.

No. 339,803. Patented Apr. 13, 1886.

N. PETERS. Plwlo-Liihcmphsr. Walhinghm. D. C.

UNITED STATES PATENT OFFICE.

GEORGE NORXVOOD, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR OF ONE- HALF TO FRANK MILLER, OF SAME PLACE.

SPRING-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 339,803, dated April 13, 1886.

Application filed September 16, 1885. Serial No. 177,232. (No model.)

To all whom, it may concern:

Be. it known that I, GEORGE N onwoon, 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 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 make and use the same.

My invention relates to certain novel and useful improvements in spring bending and forming machines, and has for its object to improve on the construction and increase the efficiency of that class of machines shown in Letters Patent No. 301,261, July 1, 1884; and with these ends in view my present 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, I will proceed to describe the same in detail, referring by letter to the accompanying drawings, forming a part of this specification, in which Figure 1 is an elevation of my machine, showing the position of the several parts after the spring has been bent and before the return of the bending devices; Fig. 2, a detail section of the gnidejaws attached to a formerbar; and Fig. 3, a view similar to Fig. 1, but with one of the bending-arms held out of operative position and one of the auxiliary arms adjusted higher than the other, for the purpose of shaping a coach-platform spring.

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

A is the frame, B the carrier, C the shaft, and D the rack, all operating as in the patent above referred to.

E are the presser or bending arms pivoted in the frame at F, and G are springs bearing against the outer faces of said arms and adapted to return the latter to their closed or normal position, as set forth in mysaid Patent No. 301,261. These springs are bolted to the carrier-frame, as shown, so as to be readily ner faces of the bars H in any ordinary manner-as, for instance, by a bolt, 0. These springs I preferably arrange, as shown in Fig. 3, on the inside of the bars, so as to be out of the way of the bars E.

Instead of springs, I can use cords attached to opposite bars and then passed around pulleys and attached to coi1-springs, as shown in Fig. 1; but I prefer the construction shown in Fig. 3.

The method of operation is the same as in my aforesaid patent; but the bars II have a special function, since when the carrier has descended so that the bars E are spread, as shown at Fig. 1, the bars II will be distended so as to press against the spring at points between the extremities. This is a great advantage, since it does away with the necessity of clamping devices to hold the spring as against buckling or irregular contraction when cooled.

My present adapted for making coach-platform or half springs, and in accomplishing this I proceed as follows: Only half of V the former-bars N is set up, and the former M and spring 0 are placed in proper position, as shown at Fig. 3. One of the bars II is pivoted in a higher plane, so that it will not extend too far beyond the inner end of the spring after the carrier has descended.

It will be readily understood that but one of the bars E is utilized, and therefore the spring which retains the other is removed, and the latter is simply rested upon any suitable peg or support, d.

l? are guide-jaws attached to the extreme ends of the former-bars by means of a rightand-left-handed screw, Q. These jaws slightly overlap the upper surface of the bars, as shown at Fig. 2.

improvement is. especially R are set-screws passed through the lower ends of the jaws and adapted to bear against the bars. The function of these screws is to take up any lost motion of the jaws after a spring has been placed between them.

To accommodate springs of different width, the jaws are caused to spread or close by the manipulation of the screw Q.

My invention produces a machine which can bend and shape any style of spring, both full and half length, and this in itself is of great'importance, since the saving of labor alone is a considerable advantage.

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

1. In a spring bending and forming machine, the reciprocating carrier having pivoted thereto two pairs of presser-bars, one within the other, the inner bars being shorter and having their pivotal point below that of the other bars, each pair adapted to be distended against the action of springs or equivalents by the downward movement of the carrier, substantially as set forth. 2. In a spring bending and forming machine, the combination, with the carrier having pivoted thereto the main presser-bars, of

intermediate resser-bars adjustably pivoted to a cross-piece of said carrier inalower horizontal plane thanthat in which the pivotal point of the main bars is located, substantially as shown and described.

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

, GEORGE NORWOOD.

I \Vitnesses: 7

S. S. WILLIAMsON, W. T. HAVILAND.

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