US98376A - Improved method of forming the heads of carriage-springs - Google Patents

Description

B. T. HENRY,A OF,NEW H A'VEJ, CONNECTICUT;

Letters Patent No. 98,376, dated December 28, 1869.

@IMPROVED METHOD 01" FORMING- THE HEADS OF CARRIAGE-SPRINGS.

The Schedule referred to-in these Letters Patent and making part of tho same To all whom it may concern Be it known that I, B. T. HENRY, of New Haven, in the county of New Haven, and State of Connecticut, have invented a new Improvement in' Heading lCarriage-Springsg and I do hereby declare the following, when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to he a full, clear, and exact description of the same, and which said drawings constitute part of this specilication, and represent, iii- Figures 1 and 2, the blanks, preparatory to heading;

Figure 3, the die; l

Figure 4, the follower;

I Figure 5, the spring-head, as it comes from t-hedie;

Figure 6, a central section of the saine; and in Figure?, the spring-head complete.

This invention relates to an improvement in forming the ends of steel or elliptic springs for carriages. Heretofore this hasbeen done by welding the ears on to the leaf of the spring l The object of my `invention is to avoid the necessity of welding, and consists in leaving suicieut metal at the end ofthe spring, after the spring is drawn down, and then, by means of suitable dies, to strike the metal at the end of the spring into shape for the ears, and at the same time to' form upon the surface, at the point where the angle is formed in turning the ears, projections, to give the requisite metalrequired to completely fill and form the angles.

The spring` is drawn down from a bar of metal sufficiently thick, that at the end, as in iigs. 1 or 2, metal will be left to form the ears a a, fig. 7. The end is then heated and placed iu a die, A, which is of the formA required 'for the head before the ears are turned, and the follower B is then struck into the die, upon the heated metal, with suicicnt force to spread the metal .and form the ears, as at d d, tig. 5.

The followe'rB has in its surface recesses ff, so as to formprojectious t t, iig. 5, at the point where the angle is formed iu turning the ears, the projections being shown 'in section, figli; then, by another suitable die, (may be the common die,) the earsare turned up, aud the head formed, as seen iti iig. 7*.-

While I prefer to usethe die A, it is not essential,

as the follower' B may strike the blank upon a perfectly flat surface, and form the projections the same as with the die; but such a process necessitates trimming the ears after the operation of the follower B; hence my preference for the die A.

I claim, as my invention- The method herein described of forming the heads of carriage-springs.

`- B. T. HENRY.

Witnesses A. J. TIBBrTs, J. H. SHUMWAY.

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