An improved System of Kiveting.
Year: 1897

page_text: Date of Application, 6th Dec., 1897
Complete Specification Left, 12th Aug., 1898-Accepted, 24th Sept., 1898
An improved System of Kiveting.
I, LEBRECHT STEINMULLER, of Gummersbach, in the Province of the Rhine,
German Empire, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to a new and improved system of riveting, and has for its
object to increase the strength and consequently the safety of the riveted joint.
I attain this object by an improved method of boring the holes for the recep-
tion of the rivets in such manner, that the said holes are not merely cylindrical,
but are further provided with recesses, cavities or the like, so arranged, that during
the subsequent process of forming the rivet-head, or closing over the rivet (whilst
in a red-hot state or otherwise) the body or shank of the rivet is caused to corre-
spondingly enter such recesses in the boiler plates or the like, to be connected by
means of such rivets.
These recesses can take the form of annular collars or shoulders, or, in a modified
construction, can extend in the form of a spiral or a screw-thread throughout the
entire depth of the rivet-hole.
In order to make my invention more clear, I refer to the accompanying drawing,
in which two forms of construction, are shown, but I do not limit myself entirely
to such constructions, as it will be apparent that I can vary the same without
departing from the principle of my invention.
The characteristic features of my improvements reside in the fact that the strain
upon the rivet head is considerably relaxed or released, which, as mentioned in
the preamble of the specification, must have the result of considerably increasing
the strength and safety of the joint connected by such rivets.
In the construction shown in Figure 1 the strain, upon the rivet is taken up by,
or falls upon the collars or bulb-like projections and also on the rivet-heads, where-
as in the construction, as shown in Figure 2, in which construction the rivet-shank
is in the form of a spiral or screw-thread, the strain is gradually distributed over
the entire surface of the rivet.
It is well known, that in the case of round rivets, i.e. rivets with a cylindrical
shank, that the strain of the joint is almost entirely upon the rivet-heads. It is
also of course well known, that in the process of cooling the shanks of the
rivets must contract or shrink, and if this shrinkage exceeds certain maximum
limits, that the rivet-heads must spring off, the result of which being, the loosening
or possibly the entire breakage of the joint.
By the employment, however, of my improved system of rivets, even should the
head of the rivet spring off, the joint would not be broken, as the aforesaid pro-
jections of the rivets form considerable bearing surfaces, said bearing surfaces,
according to the construction shown in Figure 1, being bulb-like projections,
or, as shown in Figure 2, in the form of a screw-thread. These bulb-like projec-
tions or screw-threads are produced by the rivet being forced whilst hot, into the
recesses of the rivet-hole, provided as hereinbefore described.

page_text: My improved system has also the advantage, that the increased bearing-surface
of the rivet-shank, accelerates the cooling of the rivet and also increases the tight-
ness of the joint.
Referring again to the drawing, Figure 1 shows a union of two metal plates
according to my improved system, the shank a of the rivet being provided with
two annular collars or projections 6 so arranged, that one of said collars or pro-
jections is in each plate.
In Figure 2 is shown a joint, connected by a rivet, the shank of which is pro-
vided with projections 6 in the form of a spiral or screw-thread, said projections
surrounding or encompassing the entire shank of the rivet.
70 A
LEBRECHT STEINMULLER.
By Geo. Thos. Hyde,
1, Broad Street Buildings, London, E.C.,
Agent for the Applicant.
I, LEBRECHT STEINMULLER, of Gummersbach, in the Province of the Rhine,
German Empire, Manufacturer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to a new and improved system of riveting, and has for its
object to increase the strength and consequently the safety of the riveted joint.
I attain this object by an improved method of boring the holes for the recep-
tion of the rivets in such manner, that the said holes are not merely cylindrical,
but are further provided with recesses, cavities or the like, so arranged, that during
the subsequent process of forming the rivet-head, or closing over the rivet (whilst
in a red-hot state or otherwise) the body or shank of the rivet is caused to corre
spondingly enter such recesses in the boiler plates or the like to be connected by
means of such rivets.
These recesses can take the form of annular collars or shoulders, or, in a modified
construction, can extend in the form of a spiral or a screw-thread, throughout the
entire depth of the rivet-hole.
In order to make my invention more clear, I refer to the drawing, filed with
the Provisional Specification, in which two forms of construction are shown, but
I do not limit myself entirely in such constructions, as it will be apparent
that I can vary the same without departing from the principle of my invention.
The characteristic features of my improvements reside in the fact that the strain
upon the rivet heads is considerably relaxed or released, which, as mentioned in
the preamble of the specification, must have the result of considerably increasing
the strength and safety of the joint connected by such rivets.
In the construction shown in Figure 1 the strain, upon the rivet is taken up by,
or falls upon the collars or bulb-like projections and also on the rivet-heads, where-
as in the construction, as shown in Figure 2, in which construction the rivet-shank
is in the form of a spiral or screw-thread, the strain is gradually distributed over
the entire surface of the rivet.
It is well known, that in the case of round rivets, i.e. rivets with a cylindrical
shank, that the strain of the joint is almost entirely upon the rivet-heads.
also of course well known, that in the process of cooling, the shanks of the
It is

page_text: rivets must contract or shrink, and if this shrinkage exceeds certain maximum
limits, that the rivet-heads must spring off, the result of which being, the loosening
or possibly the entire breakage of the joint.
By the employment, however, of my improved system of rivets, even should the
heads of the rivets spring off, the joint would not be broken, as the aforesaid pro-
jections of the rivets form considerable bearing surfaces, said bearing surfaces,
according to the construction, shown in Figure 1, being bulb-like projections,
or, as shown in Figure 2, in the form of a screw-thread. These bulb-like projec-
tions or screw-threads are produced by the rivet being forced whilst hot, into the
recesses of the rivet-hole, provided as hereinbefore described.
My improved system has also the advantage, that the increased bearing-surface
of the rivet-shank, accelerates the cooling of the rivet and also increases the tight-
ness of the joint.
Referring again to the drawing, Figure 1 shows a union of two metal plates
according to my improved system, the shank a of the rivet being provided with
two annular collars or projections so arranged, that one of said collars or pro-
jections is in each plate.
In Figure 2 is shown a joint, connected by a rivet, the shank of which is pro-
vided with projections 6 in the form of a spiral or screw-thread, said projections
surrounding or encompassing the entire shank of the rivet.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is:-
1. The herein described method of riveting, consisting in forming holes in the
parts to be united, the walls of each hole being provided with recesses or the like,
inserting a hot rivet therein, and then upsetting the rivet, thus forming the
head or both heads thereupon and expanding the body portion into the recesses in
each plate, substantially as described.
2. The herein described method of riveting, consisting in forming holes in the
parts to be united, the walls of each hole being provided with screw-threads or
the like, inserting a hot rivet therein, and then upsetting the rivet, thus forming
one head or both heads thereupon and expanding the body portion into the recesses
in each plate, substantially as described.
Dated this 12th day of August 1898.
LEBRECHT STEINMULLER
By Geo. Thos. Hyde,
Agent for the Applicant.