US139861A - Improvement in machines for swaging screw-threads on bolt and screw blanks - Google Patents

Description

Patented lune l-7. 1873.

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n1 B o E K L E N gingV Screw-Threads on Bolt and Screw- AMPHoro-L/HQGRAPH/c m (osoR/vn's Pnacfss) `Machines for Swa UNITED STATES APATENT GFFICE.

REINHOLD BOEKLEN, OF NEW YORK, N. Y.

IMPROVEMENT IN MACHINES FOR SWAGING SCREW-THREADS 0N BOLT AND SCREW BLANKS.

Specification forming part of Letters Patent No. 139,861, dated June 17", 18743'; application led October 2, 1872.

To all 'whom it may concern:

Be it known that I, REINHOLD BOEKLEN, of New York, in the county of New York and State. of New York, have invented certain new and useful Improvementsin Machines for Rolling Screw-Threads on Metal and I do hereby declare that the following is a full, clear, and exact description thereof that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to an improvement in machines for rolling screw-threads on metal rods where required; and consists in combining, with a vibrating and one or two stationary dies, a crank movement, andiu connecting with the vibrating die one or more annular iianges and connecting mechanism, as herein after more fully described and pointed out by the claim. j

Figure 1 represents a side elevation of a machine embodying my invention. Fig. 2 is a partial transverse vertical section. Fig. 3 is a longitudinal section through center of die D 5 and Fig. 4 is a longitudinal section of a modification.

A represents the bed piece which supports the frame or stand B, which may be of any suitable or desired construction. O C represent the stationary dies which are secured to the stand or frame B, which may be arranged to be adjusted by set-screws in the ordinary manner. vD represents the vibrating die, which is supported upon the shaft E, and has screw-threaded surfaces corresponding to those upon the face of the stationary dies for cutting threads. E represents the shaft upon which the vibrating die is mounted. Said shaft has abearing in the frame or stand A, with another suitable bearing, as shown in dotted lines, Fig. 4. F represents a crank, by which motion is imparted to the vibrating die through the shaft E. Grepresents a connecting-rod or pitman, connected with the crank F. H represents the 'hopper through which the blanks are fed and regulated in proper position by the arms I. J represents Vtw'o springs coiled around shaft E in opposite d1- rections, one end of each of these 'springs being attacheditol the stud K,secured upon the inside of the `guide L 5 the object of the springs being to throw the vibrating die `D to its normal position and allow the guide to yield to the" motions of the blank between the dies. The outer surface of the guide L is provided with annular flanges c c, which may be adjustable to correspond to thehead'of the bolt or screw, and receive the same, as shown in Fig. 2. y,

The blanks are fed from the hopper H,

one by one, into one of the pockets a. The

die D is then `vibrated, the blank passing between the said die and one of the dies (l, and the thread isby this means formed upon the blank, and the same is discharged at the point b. When the die Dis in position to discharge a screw from one of its pockets', the

other pocket is brought .directly under the hopper H and receives a blank which is to bc threaded by the .opposite die as the die D is brought back to its iirst position; thus a blank is threaded by every alternate motion of the vibrating die D. The distance between the pockets a a is equal, or nearly equal, to the crank F and die D remain suihciently still i for an instant for thepocket to receive the blank from the hopper, then at the beginning of the return stroke oi' the piston-rod the mo tion of crank F and die D is at first slow and then gradually increases, thus bringing the blanks between the dies slowly, and by a gradually-increasing speed. This prevents the machinery from being broken, as heretofore, where cogs or `belts were `used and the blank brought suddenlybetween ,the dies, and especially in the -use `of cogs where the slack or space betweenthe cogs causes a jerk! ing motion of the moving die as the blank is brought between the dies.

The modification shown inFig. 4 embodies the same principle as that above described, and is operated by the saine means. The modiiication consists simply in setting the dies C C beneath the die D, with their lower ends nearly meeting below, leaving a dischargeopening, a directly under the die D. By doing this it will necessitate the use of two heppers, H Hf, one being placed at the top of each of the stationary dies C C. With these exceptions the operation and construction is the same as the machine above described.

There may be another guide, L, placed upon the4 opposite side of the vibrating die, and the dies made sufficiently wide to cut two bolts atY the same time, but this I consider simply a duplication of what is shown and described.

Having thusfully described my invention, what I claim7 and desire to secure by Letters Patent7 is- 1. The stationary die or dies C C, and vibrating die D, provided with the guide L, the die D being operated by a crank movement directly from the rod G, substantially as and for the purpose herein specied.

2. The guide L and annular ilanges c c, in combination with the springs J, hopper H, and dies D C C, substantially as and for the purpose set forth.

3. The annular guide L, with pockets a, in combination with the hopper H, when constructed as described and for the purpose specified.

a. BOEKLEN.

Witnesses J Aivras H. GRIDLEY, SoLoN O. KEMON.

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