US571177A

US571177A - Ments

Info

Publication number: US571177A
Authority: US
Publication date: 1896-11-10
Anticipated expiration: 1913-11-10

Description

(No Model.)

J. TEMLER.

RIVET. No. 571,177. Patented Nov. 10,1896.

efigl/ a??? I dZy-J Q eifyd 0 UNITED STATES PATENT OFFICE.

JOSEF TEMLER, OF LoNDoN, ENGLAND, ASSIGNOR, BY MEsNE ASSIGN- MENTS, TO THE NATIONAL METAL EDGE BOX COMPANY, on NEW JERSEY.

RIVET.

SPECIFICATION formingpart of Letters Patent No. 571,177, dated November 10, 1896.

Application filed October 14, 1895. Serial No. 565,621. (No model.) Patented in England August 30, 1893, No. 16,335,

and in Germany June '7, 1894: No. 75,443.

To caZZ whom it may concern.-

Be it known that I, J OSEF TEMLER, a subject of the Emperor of Russia, residing at London,in the Kingdom of Great Britain, have invented a certain new and useful Improvement in Rivets, (for which I have obtained a patent in Great Britain, dated August 30, 1893, No. 16,335, and a patent in Germany, dated June 7, 1894, No. 753443;) and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

The present improvement relates to the manufacture of sheet-metal rivets, such as shown in the accompanying drawings, in Figures 1 to 3 with a round head, (see Fig. 3,) in Fig. 3 with a polygonal head, the surface of the head being flat or shaped as shown in Figs. 1 and 2, the edge being furnished with two long riveting-points and two short guiding-points interposed between the former.

Heretofore in making such rivet-blanks, such as shown in Fig. 4, they have. been punched and afterward by stamping transformed into rivets; but this method presents the disadvantage that between two rows of blanks a strip of metal is wasted, such as is shown by the cross-lining in Fig. 4, and this represents a loss of material which increases the cost of the clamps or rivets.

The work of grinding of the punches or cutters for such blanks is also excessive.

Now according to my invention the improved method of forming sheet-metal rivets presents the advantage that there is no loss of metal between the blanks; and as the cutting-tool employed has straight edges it can more easily be sharpened than those heretofore in use with curved edges.

In my improved method strips of metal are used the width whereof is even throughout and corresponds with the diameter of the rivets to be formed therefrom. From such a metal strip a, Fig. 5, pieces a are severed each by a rectilineal out. These pieces have the shape of a rhomb. To obtain such a rhomb a, one straight out passing through the metal strip a at a given angle is required for each blank, and thus loss of metal between the blanks is avoided. The rhombs so obtained are next transformed into rivets, such as shown in Figs. 1 to 3 and 3, by the known method and the known tool shown in Fig. 6. In this operation the acute-angled corners of the rhomb ct make the riveting-points and the obtuseangled ones the short guide-points between them. This method of production not only offers the advantages already set forth, 2'. 6., saving of material and simplification of the cutter, but, in addition, improves the rivets themselves, as will appear from the following: In order to connect parts by means of such rivets, the points of the rivets are driven into the material to be united by means of a forcible blow on the head. In this oper ation the points mustthemselve's force their way through the material, and therefore must present considerable stiffness, so that they may not be bent. Bending, however, when it occurs, takes place most readily at the base of the riveting-points, that is to say, at the bend between the head and the points. Obviously that point will have the least tendency to bend which has the broadest base. Now, as will be seen in Figs. 7 and 8 of the drawings, those produced by the present method, Fig. 8, are the points having the broadest base. Fig. 7 shows a rivet-blank made as heretofore; Fig. 8, one made as herein specified. In each case the dotted circle shows Where the bend will afterward come and form the base. of the points.

Obviously the base of the riveting-point in the blank made according to the present im provement is larger than in the old process.

Having fully described my invention what I claim, and desire to secure by Letters Patent of the United States, is-

1. A sheet-metal rivet made from a rhombshaped blank and composed of a circular head, riveting-points formed from the acute I corners of the blank, and guide-points formed from the obtuse corners of the blank, said riveting and guide points being bent directly from and at right angles to the circular head in contradistinction to being bent partly beneath the head, substantially as set forth.

2. A new and improved rivet formed from a specification in the presence of the subscribi-hoinb-shaped blank and having the acute ing Witnesses. and obtuse angles of the blank bent at right angles With the head to form riveting and 5 guiding points respectively, substantially as described.

In testimony whereof I have signed this JOSEF TEMLER.

\Vitnesses:

O. F. ROSENCRANTZ, HERNANDO DE SOTO.