or other Material Together.
Year: 1888

page_text: Date of Application, 3rd Jan., 1888
Specification Accepted, 10th Feb., 1888
or other Material Together.
I, LÉON OCLIDE DION, of Natick, State of Massachusetts, United States of
America, Inventor, 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 the method of fastening two or more strips of leather or
other material together by means of two tacks inserted into the overlapping or
superimposed strip from each side thereof, and the prongs of which are caused to be
interlaced or interlocked in the substance of the material, or strips, and preferably
as they meet each other, or by coming in contact with the head of the opposing
member of the fastening, and being turned thereby so as to cause the prongs to be
returned and interlocked.
Referring to the drawings
-
Figure 1 represents in elevation one form of tack with a prong to interlock with.
the
prong of a tack having a similar shaped prong inserted from the opposite side of
the strips of material which the fastening unites.
Fig. 2 shows in elevation, and
Fig. 3 in section, another form of tack for practicing this method.
Figs. 4 and 5 show still another form.
Fig. represents the application of the form of tack shown in Figs. 4 and 5,
fastening two strips of material together.
Fig. 7 represents the application of the form of tack represented in Figs. 2 and 3.
Fig. 8 represents in elevation, and
Fig. 9 in section still another form of tack for this purpose.
Fig. 10 represents the application of the form illustrated in Fig. 1.
Figs. 11 and 12 show in section another way of obtaining this interlocking clinch
in the material, reference to which will be hereinafter made.
Referring to the drawings, Fig. 1 represents a tack having a twisted or corkscrew

page_text: prong, which will, upon being inserted into the material which it is to fasten,
interlock with a tack of similar form inserted from the opposite side.
Figs. 2 and 3 represent a form of tack having a prong provided with a hole, a,
and in use the prong of one of the fastening tacks is caused to enter the hole in the
prong of the other fastening tack, and to be turned therein by the head of the tack
acting as an annular die to assume the relation to each other represented in Fig. 7.
In Figs. 4 and 5, still another form of tack adapted for practicing the process is
shown, the tack having a prong provided with a shoulder or die adapted to turn the
prong of the other fastening tack, so as to interlock, as provided in Fig. 6.
Fig. 10 represents the use of the tack having the form of prong shown in Fig. 1
in practicing my method.
In Fig. 11 is shown the use of the tack represented in Figs. 8 and 9. They are
caused to be partially inserted in the material, as represented in Fig. 11, and the
heads are then moved transversely in relation to each other to bring them central at
the same time that pressure is employed to turn or upset the ends of the prongs,
and this results in the prongs interlocking, as represented in Fig. 12.
It is obvious that two or more strips or pieces of leather or other material or fabric
united together by headed tacks inserted from opposite sides of the material, and
having prongs so shaped or directed that they are caused to interlock in the substance
of the united material, provides a very strong fastening, and at the same time a very
flexible one, and that the fastening is especially adapted for use in the manufacture of
a variety of articles, such as leather belting, mail bags, rubber beting, &c.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
The method of fastening together two or more strips of leather or other flexible
material or fabric by two headed tacks, consisting in inserting the tacks into the
strips or pieces of material to be united, from opposite sides thereof, and causing their
prongs, which may or may not have been previously partially formed for the purpose,
to form their own holes in the material and to be interlocked or interlaced in the
substance of the material, as and for the purposes specified.
Dated this 10th day of December 1887