US176048A - Improvement in machines for forming carriage-clips - Google Patents

Description

3Sheets-$heet1f F. B. PRINDLE. MACHINES FUR-FORMING CARRIAGE CLIPS. No.176.048. Patented April 11, 1876.

3 Sheets-Sheet 2.-

F. B. PRINDLE. MACHINES FOR FORMING CARRIAGE CLIPS. N 0.176,048. I Patented Aprill1,1876.

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MACHINES FOR FORMING CARRIAGE CLIPS No. 176,048. Patented April 11, 1876.

IM/EN U yT'QM OMQQZQ ",FEYERS. PHOTO-LITNDGRAPHER. WASHlNGTON, D C.

i i I I 'r I UNITED STATES PATENT OFFICE.

FRANKLIN B. PRINDLE, OF SOUTHINGTON, CONNECTICUT.

IMPROVEMENT IN MACHINES FOR FORMING CARRIAGE-CLIPS.

Specification forming part of Letters Patent No. 176,048, dated April 11, 1876; application filed October 15, 1875.

To all whom it may concern:

Be it known that 1, FRANKLIN B. PRINDLE, of Southington, in the county of Hartford and in the State of Connecticut, have invented certain new and useful Improvements in Mechanism for Forming Carriage-Clips; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a plan view of the upper side of my machine. Figs. 2 and 3 are elevations of opposite sides of the same. Figs. at and 5 are like views, enlarged, of the front end of said machine, showing the swaging mechanism. Figs. 6 and 7 are vertical sections upon line a: w of Fig. 1, showing, respectively, the cutting and holding mechanism before and during op eration. Fig.8 is a like view of the sliding carriage upon line 00 w of Fig. 2, and shows the pawl employed for rotating the die-head and Fig. 9 is a horizontal section upon line 2 z of said Fig. 2, showing the means employed for operating said pawl.

Letters of like name and kind refer to like parts in each of the figures,

The design of my invention is to enable carriage-clips to be produced of a better quality, and with less waste of metal, than has heretofore been practicable by machinery; and to this end it consists, principally, in an improved method of forming clips, by confining the ends of a blank in longitudinal position, and, by means of a roller, forcing the surplus metal in each direction from its longitudinal center lengthwise to thejuuction of its flattened and round portions, substantially as and for the purpose hereinafter specified. it consists, further, in the mechanism employed for forming the clip, substantially as is hereinafter shown. It consists, further, in the means employed for severing blanks from a rod of iron, substantially as and for the purpose hereinafter set forth. It consists, further, in the means employed for confining the blank in position upon the die, substantially as is hereinafter shown and described. It consists, finally, in the means employed for giving to the many-faced die an intermittent rotary motion, substantially as and for the purpose hereinafter shown.

I In the annexed drawings, A represents a head, which isarranged to move longitudinally within suitable horizontal ways I) and b, and has pivoted within its upper side a block, 0, that has upon its periphery a series of faces, 0, c, and 0, each of which contains depressions c, 0, and c, that correspond in size, shape, and relative position to the like features of the round portions of a carriage-clip. Within the frame B of the machine, near its longitudinal center, is pivoted a lever, D, of the shape shown in Fig. 2, which is capable of being moved in a vertical plane upon its pivotal bearing, and at its forward end is provided with a roller, E, that may be caused to bear upon the uppermost face 0 of the dieblock 0 as the latter is moved longitudinally beneath the same.

It is intended that a blank consisting of a round piece of iron, corresponding in transverse size to the threaded portions of a tinished clip, shall be properly heated and placed upon the upper die 0, with its ends closely confined in place, and that as the dieblock 0 moves rearward, the roller E shall be caused to bear heavily upon said blank near its longitudinal center, and flatten the same to the point where the flattened and round portions of that end of the clip meet, and that upon the return movement of said die-block said roller shall perform the same operation upon the remaining half of said blank, by

which operation, as the latter is prevented.

from being lengthened, the surplus metal is carried by said roller to the points where most needed-via, the said junctions of the round and flattened portionsand forms full and perfect shoulders at such points.

The reciprocating movement of the block A is produced by means of a rock-shaft, F, which is journaled within the lower side of the frame B, and is provided with two vertical arms, f and f, the first of which, working within a central longitudinal opening in said frame, is connected with the rear end of the head B by means of a bar, G, that is pivoted to and extends between said parts, while said second arm f, placed outside of said frame, is connected with a crank-arm, h, of a revolving shaft, H, by means of a connecting-rod, I, the arrangement described being such as to cause the revolution of said shaft to communicate to said rock-shaft an oscillating motion, which, in turn,'gives a reciprocating motion to said head. The shaft His journaled within the rear end of the frame B, directly beneath the rear end of the lever D, and at such point is provided with a cam, 71/, which bears against said lever end, and has such size, shape, and position, circumferentially, upon said shaft, with relation to the arm h, as give to said lever the desired motion, befoi e described.

To effect such revolution of the die-block at the termination of each outward stroke as will bring a new die upward, the followingdescribed mechanism isemployed: Upon the rear end of the block 0 is provided a ratchetwheel, 0, and upon the pivotal bearing of said head, outside of said ratchet, is loosely journaled a disk, K, that has the form, in rear elevation, seen in Fig. 8,01ie side being extended sufficiently to enable a pawl. 76, to be pivoted thereto, so as to engage wit-l1 said ratchetavheel, while from the lower edge of said disk extends downward an arm, 7t, that is contained within the forked end 1 of a lever, L, which latter is pivoted within a suitable recess in the lower portion of said head, and is capable of a horizontal movement therein.

As seen in Fig. 9, the lever L has nearly the shape of a right angle, with one of its arms, l, connected, as described, whilcits other shorter arm, 6, projects beyond the side of the head A, and, as the latter moves within its bearings, engages with two stops, M and M, which are attached to the frame B in such positions as to throw said lever, just before the limit of motion, in each direction of said head, and thereby operate the pawl-disk and its pawl, and partially rotate the die block at each operation.

It is designed that the blanks shall be cut from a bar of metal just before being operated upon, which result is accomplished by the following-described means: The die-block U hasjust the length of the desired blank, and

to one side of the head A is journaled a shaft, N, which has two cutters, n and n, that extend radially outward, and by a partial revolution of saidshaft may be caused to pass sufficiently near to the ends of said block A to shear off a metal rod placed upon the latter beneath said cutters.

A11 arm, a, secured to and extending downward from the shaft N, engages with an inclined surface, 0, upon the contiguous portion of the f2tl116 B, as the head A nears the limit of its inward motion, and, by giving to I said shaft a partial revolution at such instant,

causes its cutters to operate, as described.

The blank thus out from the bar is carried upward and forward by the next partial revolution of the dieblock to a position for re ceiving the impact of the swaging-roller, in which position it is held-by means of two arms, 19 and 19, that are attached to and extend radially outward from a' shaft, P, and embrace the ends and the upper side at sair ends of said blank, and confine the same firmly upon its die.

The holding-shaft P is operated, as in case of the cutting-shaft, by means of an arm,p, which extends downward from the 'former, and, as the head moves rearward, engages at its lower end with, and is moved outward by, an inclined surface, Q, formed upon the contiguous portion of the frame B.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s- 1. An improved method of forming clips by confining the ends of a blank in longitudinal position, and by means of a roller forcing the surplus metal in each direction from its longitudinal center lengthwise to the junction of its flattened and round portions, substantial- 1y as and for the purpose specified.

2. The die-blocks O c o, constructed as shown, and arranged to reciprocate lengthwise in a horizontal direction, in combination with the lever D and roller E, which have such vertical motion as to cause said roller to impinge upon said die-block, substantially as and for the purpose shown.

3. In combination with the many-faced dieblock 0, pivoted within the head A, and arranged to reciprocate longitudinally with the same, the shaft N, journaled upon said head, provided with the cutters n and 'n and arm a, and caused to oscillate within its bearings by contact of said arm with the inclined and relatively-fixed surface 0, substantially as and for the purpose set forth.

4. In combination with the pivoted manyfaced die-block U, the shaft P, provided with the holders 1) and p and arm 10, and caused to'oscillate within its bearings by contact of said'arm with the inclined and relatively-fixed surface Q, substantially as and for the purpose shown and described.

5. In combination with the pivoted die block 0, provided with the ratchet-wheel G, and arranged to reciprocate with the head A, the disk K, provided with the pawl 70 and arm k, the lever L l l, and the stops M and M, all arranged to operate in the manner and for the purpose substantially as specified.

In testimony that I claim the foregoing I have hereunto set my hand this 14th day of April, 1875.

FRANKLIN B. PRINDLE.

Witnesses:

GEO. S. PRINDLE, WILLIAM FrrcH.

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