Year: 1899

page_text: 1, HANS WEITAG, Partner of the Firm of Wesser & Co., of Velbert, near
Elberfeld, Rhenish Prussia, Germany, Manufacturer, do hereby declare the nature
of this invention to be as follows:-
same.
-
My invention relates to a new beltfastener and the manner of making the
It has for its object to create a beltfastener which can be stamped out
of sheet metal in such a manner that no loss of material is caused and that
with each stroke of the stamping or punching machine two blanks for a fastener
are obtained which then only require bending of their teeth to give the finished
beltfastener, so that the article can be produced cheaper than any other article
of the same kind.
One form of the new beltfastener is shown in Figures 1, 2 and 3, giving
respectively a top view, a longitudinal section and a cross section along line I-I
of Figure 1; in this case the blank shown in Figure 4 is used. The teeth h, y
and h, respectively are thereby formed by bending at right angle to the surface
of the metal the pointed parts b, c and b c of the blank a at either side. These
pointed parts of the blank a arc so arranged that the empty parts on one side
correspond exactly in shape and with regard to their position to the projecting
parts forming the teeth on the other side; thus the teeth b, c are equal in shape
to the empty spaces m, respectively which lie exactly opposite to them and the
teeth b, c of the right side are equal in size and formation to the emply spaces r
and respectively on the left side and they are exactly situated in a line with
each other.
It
In Figures 5, 6, 7 and 8 I show respectively a blank, a top view, a longi-
tudinal section and an end view of a modified form of the new belt fastener.
differs from the preceding one only in this, that the teeth instead of being pointed
or triangular here are rectangular.
The teeth G, II and (, H are again formed by bending down the rectangular
parts B, C and B, C respectively of the blank A at either side. The projecting
parts B, C and B' C", in similar manner as before, correspond in size and shape
and with regard to their position to the empty spaces RS and M, N respectively.
For making these beltfasteners I use a stamping tool or a dio exactly of the
shape of the blanks in each case and I use these dies as indicated in Figures 9
and 10. I cut away first the parts shown in hatching marked X and Y at the
end of a band or strip of steel plate of a width corresponding to the length of
the beltfastener to be made; I then shift the steel plate by double the length
of the average width of the blank or the die, that is by double the distance marked r
in Figure 4 and y in Figure 5, leaving the die at its place over the plate and
by then causing the die to stamp out the piece markede or E, respectively, in
Figure 10 two blanks are formed in one operation and in continuing in the same

page_text: way, that is always shifting the steel plate twice the average width of the blanks,
two blanks are formed at each down stroke of the punching tool.
T
4 104L
↓ Xamma 1900
HANS WEIHTAG,
Partner of the Firm of Wesser & Co.,
Per Karl J. Mayer, Agent.
I, HANS WEIHTAG, Partner of the Firm of Wesser & Co., of Velbert, neur
Elberfeld, Rhenish Prussia, Germany, Manufacturer, do hereby declare the unture
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement :—
My invention relates to a new beltfastener and the manner of making the
Game. It has for its object to produce a beltfastener which can be stamped out
of sheet metal in such a manner that no loss of material is caused and that
in making the same, with each stroke of the stamping or punching machine two
blanks for a fastener are obtained, which then only require bending of their teeth
to give the finished beltfastener. By this manner the new beltfustener can be
produced cheaper than any other article of the same kind.
On the accompanying drawing I show two sorts of beltfasteners, differing only
in the shape of their teeth, but being alike in all other respects and which are
also made in exactly the same manner with corresponding toole.
Fig. 1 is a top view of a beltfastener with pointed teeth;
Fig. 1 is a corresponding view of a beltfastener with fat teeth;
Fig. 2 is a longitudinal section of Figure 1;
Fig. 2 is a longitudinal section of Figure 1*;
Fig. 3 is a cross section of the beltfastener with pointed teeth;
Fig. 3 is a similar section of the beltfastener with flat teeth;
Figs. 4 and 4 are respectively the blanks for making the beltfastcuers Figure 1
and Figure 1 respectively;
Fig. 5 indicates the first cut in a strip of sheet metal for making the belt-
fasteners according to my method;
Fig. 6 shows how after the first cut the work is proceded with to produce two
blanks with each stroke of the punching tool;
Figs. 5 and 6 are similar views for making the beltfasteners with flat teeth.
In making my new beltfasteners I use tools or dies exactly of the shape of
Figures 1 or 1 or similar ones, the peculiarity of which consists in this, that
always the outlines of a tooth A, B, C or D on one side are parallel and form
the reciprocals of the outlines of the corresponding cuttings or openings A', B' C
or D on the other side of the blank. One set of teeth is about of double length
as the other and they alternate with each other.
The longer ones, A and C are bent down at right angle at half their length,
approximately in a line with the points of the short teeth B and D and these are
bent down in a similar manner at the root or at the corner of the small
cuttings B D respectively.
By this means the finished beltfasteners receive the forms shown by Figures 1,
2 and 3; the teeth A and B alternately are further away from the middle and
the same is the case with the teeth C on the other side, which are further away
from the middle than the teeth D, so that in driving the belt fastener into the
two ends of a belt and connecting these together each tooth takes hold of an

page_text: other part of tho leather. Now, as said above, I use a stamping tool or die having
a cross section exactly in form like the blank Figure 4 and a strip of band steel
or sheet metal of exactly the same width (Figure 5): In passing this under the
stamping machine, I first cut out a part E shown shaded in Figure 5; this is
the only waste produced leaving an edge shaped as at F at the end Figure 6.
After this I shift tho metal strip forwards by the double width of the die or tho
blank and in driving down the tool at G (Fig. 6) two blanks are produced as
will be readily understood at a glance at Figure 6.
In exactly the same manner I proceed in making beltfasteners with flat or
other shaped teeth as one is shown in Figures 1 to 6 where similar lottors with
an asterix indicate similar, parts.
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 :-
1/ The method of making beltfasteners out of sheet metal of suitable thick-
ness consisting in this that a strip of such suitable metal is used of exactly the samo
width as the beltfastener to be made, that such a strip when the first cut has
been made, is passed through a stamping machine having a stumping tool or
die of exactly the same shape as the blanks out of which the beltfasteners are
to be performed (Figure 1 or 1) and that then the strip, after each down stroke
of the dic, is advanced double the width of the blank or die so as to cut out two
blanks at each stroke, then bending the teeth formed at both sides at right
angle to the surface of the metal as illustrated and described and for the purpose
set forth.
2/ A beltfastener of sheet metal with pointed teeth or with flat teeth dis-
tinguished by this, that in the blank used for making the same the outlines of
the teeth A, B, C, D on one side correspond and are parallel to the outlines of
the openings or cuttings A¹, B, C D on the other side of the blank and that
alternately one set of teeth (A, C) in the blank are of about double the length
as the other teeth (B, D) and that the longer teeth are bent down in the middle
of their length, while the shorter ones are bent at the corners of their adjacent
short openings.
11... 1041 1 1.. 1000