US245691A - alker - Google Patents

Description

(N0 Model.)

J. H. ALKEP..

DIE FOR PORMING GOUPLING PI'NXS.

110.245,691. Patented Aug. 16,1881.

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i UNITED STATES PATENT OFFICEQ JOHN H. ALKER, OF PITTSBURG, PENNSYLVANIA, A SSIGNOR TO JONES St LAUGHLINS, OF SAME PLACE.

DIE FOR FORMING COUPLING-PINS.

SPECIFICATION forming' part of Letters Patent No. 245,691, dated August 16, 1881.

Application led May14, 1881.

To all whom t may concern:

Be it known that I, JOHN H. ALKER, of Pittsburg, county ot' Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Dies for Shaping and Forming the Heads and Shoulders of Coupling-Pins; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-like letters indicating like parts- Figure lis a view, in perspective, of my im- I proved dies for forming a shoulder and head on couplingpin blanks. Figs. 2 and 3 show sectional elevations of the dies and blank in different positions of working 5 and Figs. 4. and 5 show dierent forms of blanks, illustrative of the work performed by my improved dies, Figs. 6 and 7 showing cross-sections of the blanks in Figs. 4 and 5 respectively.

My present invention relates to dies for upsetting the ends of coupling-pin blanks and forming thereon an enlarged shoulder, a, and head a', as illustrated in Figs. at and 5. In forming such shoulder and head I make use of two griping-dies, B B', in the adjacent faces ot which are formed the parts b b of a gripingcavity. At the rear edge, d, or toward the point end of the blank, this cavity b conforms in size and shape to theblank A. Toward the opposite edge, d', or the edge toward the end of the blank to be upset, the griping-cavity is widened or enlarged, so that part or all of the walls of the cavity incline awaytrom the blank when lirst griped, or before the latteris upset, thereby affording space between the gripingdies, within which the stem of the blank below the shoulder is upset or enlarged, as at a2. If the body or stem of the pin or blank be Hattened or oval in form in cross-section, the walls of cavity b are, by preference, inclined from d to d on the edges only or principally, so that the enlargement of the pin at a2 is principally in the direction of its edges, as in Fig. 4; but if round pins are required, the taper from d to d maybe uniform on all sides of the cavity, giving a uniform enlargement in size, as at a2, Fig. 5. The advantages secured in both cases (No model.)

are substantial'y the same-that is, the pin is strengthened and better adapted to iilltheupper hole in the draw-bar head ofthe car, and also by the upsetting ot' the metal within the gripingdies, as described, the blank is more easily prevented from yielding between such dies during the final and heaviest compresf sion impart-ed in the operation of forming the head and shoulder. These dies B B also serve as an anvil against which the Linder or ilat face of" the shoulder a is pressed and formed. They should therefore be strong and well secured. One die, B, is secured in place, by preference, upon a horizontaltable or bed, and the other die, B', is moved horizontally toward and from die B, and for this purpose it may be mounted in and operated by any suitable or well-known mechanism adapted to bring such die against and hold it upon the interposed blank A, as in Fig. 1, with therequired power. Several forms of such mechanism are in common use, and need not be described in detail.

In combination with the griping-dies B B', I make use of a solid upsetting-die (l, in the end orhead of which is formed a sunken cavity, c, having depth and form adapted to produce the desired head a', which form corresponds approximately to that of the stem ot' the blankthat is, in oval pins, like Fig. 4, the head a retains substantially the same flattened or oval form in cross-section as the stem, and its width and length are such as to permit punching or otherwise forming a hole therein in the usual mannerfor convenience of attach ment and handling. In round pins the cavity c is shaped with reference to forming a head round in cross-section and having a length somewhat in excess of its diameter, as at a',

diesBB,itand may beoperated byany suitable or well-known power devices, which are adjusted and arranged to carry the working-face of this die against the adjacent edges d ofdies B B', when the lat-ter are griped upon the blank. In so doing the end ofthe properly-heated blank is caused to enter cavity c, and bearing or abutting against the bottom c is upset, filling the cavity or space between the griping-dies and producing the enlargement a2, as stated 5 also, the metal is upset within and lls cavity c in die C, forming the head a and shoulder a, the latter being given a dat under face by the edges of dies B B', and a rounded upper face by the countersink e.

By methods of manufacture heretofore prac,- ticed, considerable skill was necessary to e11- able the Workman to produce a good shoulder and head on a pin-blank of either ovalor round form 5 but with dies made and operated as above described such Work can be done by unskilled or cheap laborers with rapidity and with great uniformity and perfectness of finish, and in these respects myimproved dies are an improvement in the art of making couplingpins,and lessen considerably the costof manufacture. Y

I claim herein as my inventionrIhe griping-dies B B', having griping-cavities b therein, which increase in width or size toward the end of the blank to be upset, in combination with the upsetting and shaping die C, having sunken cavity o in its workingface with countersink c at the rim or mouth of such cavity, such dies being adapted,substan tially as described, to upset and shape a shoulder, a, head a', and enlargement a? on a couplin g-pin.

In testimony whereof I have hereunto set my hand.

JOHN H. ALKER. Witnesses:

R. H. WHlT'rLEsEY, C. L. PARKER.

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