US1503859A - Tubular rivet and the like article - Google Patents

Description

Aug. 5 1924.

Y E. B. STIMPSON TUBULAR EIvET AND THE LIKE ARTICLE Filed Nov. 1, 1920 I MNVENTOR BY Ai z W Ada/9 &

Pdtentd Aug. 5, 1924.

UNITED STATES 1,503,859 PATENT orrlca EDWIN B. STIKPSO'N, 01' BROOKLYN, NEW YORK, ASSIGNOB TO EDWIN B. STIIPSON COIPL'NY, OI BROOKLYN, NEW YORK.

TUBULAR BIVE'I' AND THE LIKE ARTICLE.

To all whom it may concern:

Be it known that I, EDWIN B. STIMPSON, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Tubular Rivgt and the like Articles, of which the following is a specification.

This invention relates to improvements in tubular rivets or the like articles, and has for its object to provide, inarticles of this clas, a conformation which will strengthen the tubular art to greater resistivity as against buck mg or crumpling of the tube resulting from the operations of setting or upsetting the rivet.

For accomplishing this object I provide that the wall of the penetrating end of the rivet tube shall be of desirably minimum thickness and that the wall shall progressively and regularly increase in thickness from the penetrating end of the tube towards the opposite or head end thereof. Incidentall I prefer that the outside diameter of t e tube shall be uniform from end to end; in other words, I aim to provide a rivet in which the tubular part is of uniform outside diameter and of progressively decreasing inside diameter from the penetragting end towards the head end of the tu c.

It will be evident that by such a construction I retain the desirable penetrating qualities for the one end of the rivet, and give it necessary additional strength between its two ends where buckling or crumpling might otherwise take place; and because the change in thickness of wall from one end to the other is gradual and progressive, I have a rivet which oifers'the minimum frictional resistance as it is driven through the member in which it is secured, consistent with the elimination of buckling as aforesaid.

Other objects and aims of the invention, more or less broad than those stated above, together with the advantages inherent, will be in part obvious and in part specifically referred to in the course of the following description of the elements, combinations, arrangements of parts, and applications of principles constituting the invention; and the scope of rotection contemplated will appear from t e claims.

In the accompanying drawings; which are to be taken as part of this specification, and

in which I have shown merely a preferred form of embodiment of invention,

Figure 1 is an elevation of a headed tubular rivet; Fig. 2 is a longitudinal sectional view on line 2-2 of the same; Fig. 3 is a topeview looking into the open end of the tu In the drawings, the tubular part of the rivet is indicated at 7, the outside at 8, the inside wall at 9 and the head at 10.

The wall of the tube, from the penetrating end thereof towards the head end may be said to consist of a series of annuli 12, 13,

14, 15, &c.,of progressively increasing thickness from the penetrating end to the head end of the tube and merging into and integral' one with the other, having outside walls of the same diameter, constituting together the outer wall of the tube. That is to say,

the annuli have an outside wall in common,-

which is the outside wall of the tube and their inner walls respectively are of progressively decreasing diameter from the penetrating end to the head end of the tube.

Furthermore, the parts of the tube between adjacent annuli 12, 13, &c., may be identified as annuli 16, 17, &c., having outer walls in common with the outer walls of the annuli 12, 13, &c., and each having an inner wallwhich extends from the end of the inside wall of annulus 12, for instance, to the end of the inside wall of the next adjacent annulus 13. Consequently the inside wall of each connecting annulus 16, 17 &c. will taper towards the axis of the tube and from the penetrating end of the tube towards the head end thereof. It results from this conformation that the inner wall of the tube cross-sectionally considered presents a series of steps in the following order, a vertical step, an inclined step, another vertical step, another inclined step, &c., each vertical step and each inclined step, from the penetrating end of the tube towards the head end, being nearer to-the axis of the tube than the one preceding it. Because of the inclination of the connecting portions 16, 17, &c., the tube offers the minimum resistance to its own passage through the sheet or material to which it is secured in practice, consistent with the necessary strength to prevent buckling or erumpling between penetrating end and head end. The conformation shown in Figure 2 may be obtained in any preferred way, foninstance, by drilling or reaming outwith drills or reamers of diflerent sizes, employed in proper sequence and adapted to make the proper vertical or inclined surfaces.

Inasmuch as many changes could be made in the above construction, and many apparently widely difierent embodiments of my invention could be made without departing from the scope thereof, it is 1ntendedthat all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all the generic and ecific features of the invention herein escribed and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

claim 1. An article of the kind described, having a tubular part made up of an integral series of annuli with co-axial inner walls and with outer walls which are in longitudinal extension and continuation of one another, and the annuli being of thickness progressively increasing from one end of the tube to the other.

2. An article of the kind described, having a tubular part made up of an integral series of annuli with co-axial inner walls and with outer walls which are in longitudinal extension and continuation of one another, and the annuli bein of thickness progressively increasing from one end of the tube to the other, and another series of annuli, each of which connects adjacent ones of the first-named series of annuli, the inner wall of each of the second-named series of annuli being inclined towards the axis of the tube and from one end thereof toward the other.

3. An article as set: forth in claim 2, in which the outer walls of all of the annuli are in a cylindrical surface coaxial with the tube.

In testimony whereof I aflix my signature.

' EDWIN B. STIMPSON.

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