US118780A

US118780A - Improvement in carriage-clip blanks and in dies for making the same

Info

Publication number: US118780A
Authority: US
Publication date: 1871-09-12
Anticipated expiration: 1888-09-12

Description

UNITED STATES PATENT OFFICEa HENRY M. BEECHER, OF PLANTSVILLE, CONNECTICUT.

IMPROVEMENT IN CARRIAGE-CLIP BLANKS AND IN DIES FR MAKING THE SAME.

Specification forming part of Letters Patent No. 118,780, dated September 12, 1871.

To all whom 'fit may co'neern':

Be it known that I, HENRY M. BEEGHER, of Plantsville, in the county of Hartford and State of Connecticut, have invented a new and useful vImprovement in Roller-Dies for Forging Carriage-Clips, of which the following is a specication:

My invention consists of the improved rollerdies herein described and of the blank formed therein.

In the accompanying drawing, Figure 1 is a side view of roller-dies embodying my invention; Fig. 2, a top view of the same; Figs. 8 and 4, a side and end View of the blank as formed by said roller-dies and Figs. 5, 6, and 7 are side, end, and edge views of the clip as formed from said blank.

A designates the frame of the machine, on which is mounted the roller-dies B B, said dies having their peripheries formed as shown, so that when brought nearly together the outlines of the space a between them are of the form desired for the outlines (side View) of the clip blank. A gear, b, is connected to one end of each of the roller-dies B B, and meshes into an intermediate gear, C, on the driving-shaft c, so that both of the dies B B revolve in the same direction, as indicated by the darts in Figs. l and 2. One of the dies B is mounted on a carriage, d, on the frame A, so that by means of a cam (not shown) it may be moved to and from the other die.

rI he carriage d is placed in the position indicated by broken lines, thus throwing the rollers open, when a round rod of iron, of a size equal to the size designed to finish the straight portion h of the blank D, is properly heated and passed through the guide k and between the dies, which are then brought toward each other, and as they strike the rod it rotates between said dies on a line With their centers, or the point at which the dies come the nearest to each other, until the dies are in the position shown in the drawing, in assuming which position the beveled portion m of the dies A A forms the points n, While the central bulge o reduces the size of the rod in the center and throws the stock therefrom into the grooves p p, thus forming a round blank, D, between said dies, the area of its central longitudinal section being of the form of the space a., as shown. The blank D is then cut from the rod by any suitable device, the dies opened, and the blank removed, when the operation can be re` peated, as before described. The form of the bulge o and grooves 19 p should be such as to simply throw the stock from the center of the blank D toward the ends thereof and form the beads o o without changing the original length of that portion of the rod operated upon by such parts of the dies A A. The blank D, formed as before described, is then flatted into the form of the ordinary nished clip, Figs. 5, 6, and 7, which, it will be observed, has the least amount of stock in the middle of its length and the greatest amount near or just inside of the straight portions h h. Therefore the blank D, of the form shown, when latted into a clip, has straight edges or sides s s, as shown in Fig. 5, whereas, if the blank was not reduced in the center, as described, the edges of the clip as left by the tlattingdie would be rounding, as indicated (upon one side) by the broken lines in Fig. 5, and therefore the clip is necessarily trimmed in order to make the edges straight.

I am aware that round rods have been upset to obtain additional stock inside of the straight portion It 7L of a clip, the central portion of such rod being left full size.

I claim as my invention- 1. The roller-dies B B, with their peripheries molded to the shape herein shown and described, for the purpose of forming carriage-clip blanks, as set forth.

2. The carriage-clip blank D as formed there in, having its central portion reduced and thrown outward to form the beads o o, substantially as and for the purpose described.

HENRY M. BEECHER.

Witnesses JAMEs SHEPARD, C. A. SHEPAED.