Improvements in or relating to Metal Strips for connecting Pieces of Card or similar Board, Leather, Wood, and the like.
Year: 1898

page_text: Date of Application, 1st June, 1898
Complete Specification Left, 1st Mar., 1899-Accepted, 29th Apr., 1899
Improvements in or relating to Metal Strips for connecting Pieces of
Card or similar Board, Leather, Wood, and the like.
I, LUDWIG JOHANN FRIEDRICH NICOLAI, Manufacturer, of 32, Lobtauer Strasse,
Dresden, in the Empire of Germany, do hereby declare the nature of this inven-
tion to be as follows:-
-
This invention relates to metal strips for connecting pieces of card or similar
board, leather, wood and the like, and has for its object to construct a strip
which is easy to manufacture in the first instance, can be readily applied and will
securely hold the parts to be joined together.
According to this invention a strip of metal has a series of holes made in it by
means of a punch, which, in making a hole strikes up two or more points of
metal so that they project at right angles from the surface of the strip. These
points or tongues are arranged in groups of two or more, and by reason of the
manner in which they project from the surface of the strip when forced into any
material compress that portion of it which lies between the teeth of each group
causing the points of the teeth to rivet themselves into the material.
The tongues are struck up from the strip so that they neither lie parallel to
nor at right angles to the axis of the strip, this arrangement when the strip is
applied to any material preventing the latter from being perforated in a straight
line, the teeth forming a zigzag which reduces the tendency of the material to
tear where pierced.
When being punched a die is arranged beneath the strip into which the punch
enters, together with the points struck up by it. The punch is made a fairly
close fit within the die so that the projection of the tongues at right angles to the
surface of the strip is ensured, their opening out or assuming any other position
being thus prevented.
In applying the improved strip, the material to which it is applied is backed
by a hard surface or anvil, the strip being forced down so that the teeth penetrate
practically simultaneously into the material, rivetting themselves in a manner
described. If the material is sufficiently thin the points of the teeth come out
on the other side, and they are rivetted over against the anvil.
Dated this 1st day of June 1898.
LUDWIG J. F. NICOLAI.
Boult & Wade,
Agents for the Applicant.
5 Improvements in or relating to Metal Strips for connecting Pieces of
Card or similar Board, Leather, Wood, and the like.
I, LUDWIG JOHANN FRIEDRICH NICOLAI, of 32, Lobtauer Strasse, Dresden, in
the Empire of Germany, Manufacturer, do hereby declare the nature of this in-
D
077

page_text: vention 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 metal strips for connecting pieces of card or similar
board, leather, wood and the like, and has for its object to construct a strip
which is easy to manufacture in the first instance, can be readily applied and will
securely hold the parts to be joined together.
According to this invention a strip of metal has a series of holes made in it by
means of a punch, which, in making a hole strikes up two or more points of
metal so that they project at right angles from the surface of the strip. These
points or tongues are arranged in groups of two or more, and by reason of the
manner in which they project from the surface of the strip when forced into any
material compress that portion of it which lies between the teeth of each group
causing the points of the teeth to rivet themselves into the material.
The tongues are struck up from the strip so that they neither lie parallel to
nor at right angles to the axis of the strip, this arrangement when the strip is
applied to any material preventing the latter from being perforated in a straight
line, the teeth forming a zigzag which reduces the tendency of the material to
tear where pierced.
When being punched a die is arranged beneath the strip into which the punch
enters, together with the points struck up by it. The punch is made a fairly
close fit within the die so that the projection of the tongues at right angles to the
surface of the strip is ensured, their opening out or assuming any other position.
being thus prevented.
In applying the improved strip, the material to which it is applied is backed
by a hard surface or anvil, the strip being forced down so that the teeth penetrate
practically simultaneously into the material, rivetting themselves in the manner
described. If the material is sufficiently thin the points of the teeth come out
on the other side, and they are rivetted over against the anvil.
In the accompanying drawings Figure 1 is a perspective view of a portion of a
metal strip perforated in accordance with this invention.
Figure 2 is a section of the same on the line 2-2 of Figure 1.
Figure 3 is a similar section of a portion of a strip after the points have been
embedded in some material.
Figure 4 is a plan of a portion of a strip applied to some material.
Figure 5 is a perspective view of a portion of a metal strip perforated some-
what differently from the strip illustrated in Figure 1; and
Figure 6 is a view similar to Figure 3 but illustrating what happens to the
points of the teeth when they pass right through the material into which they
are driven.
Like letters indicate like parts throughout the drawings.
The strip of metal A is perforated in such a manner as to strike up a group of
points A. In the example shown in Figures 1 to 4 these points are 4 in number
the hole being approximately square and the points standing out at right angles
to the plane of the strip and in planes at right angles to each other. The holes
are perforated preferably in a line as shown in Figure 4, but the arrangement is
such that the base of each point A¹ lies so as to form an angle other than a right
angle with the axis X Y of, the strip A. In the example shown this arrange-
ment is such that the diagonals of the square holes are parallel with each other,
the bases of the projecting points making angles of approximately 45° with the
axis XY of the strip A.
In the example illustrated in Figure 5 the points A¹ are three in number the
hole and the points being triangular as shown.
In applying a strip such as has been described to a piece of card or similar
board, leather, wood, or the like B, the strip is forced down upon the material B
so that the points A' are driven into it. In this process it will be understood that
that portion B¹ of the material B which is enclosed between the points A¹ and
fills up the hole in the strip A is, as the points are driven in, slightly compressed.

page_text: The effect of this compression acting upon the points, bends them slightly out-
wards, particularly towards their extremities, which are consequently turned or
rivetted over as at A2, Figure 3, or Figure 6. If the material B is of sufficient
thickness this rivetting over takes place in the substance of the material, but
if the material is thin enough to allow the points to pass right through, the
tendency of these points to spread apart, which is started by the compression of
the material enclosed by them, is followed up when the extremities of the points
come in contact with the anvil upon which the substance B is placed when the
strip is applied to it. As a result the extremities A² of the points are as in
Figure 6 turned or upset over and securely rivetted on the under side of the
material B.
It is to be noted that by arranging the perforations in a strip so that the points
when struck up lie with their bases in some such way as shown in the example
in Figure 4, the material 13 is not perforated by these points in straight lines,
the perforations, which are in reality small lines, lying in a zigzag, an arrange-
ment which does not render the material B so liable to be torn where the strip
is attached.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. Metal strips for connecting pieces of card or similar board, leather, wood
and the like having gripping points struck up in groups of two or more, so that
when forced into the material to be connected, that portion lying between the
points in each group will be compressed, with the result that the points rivet
themselves into the material substantially as described.
2. Metal strips for connecting pieces of card or similar board, leather, wood
and the like having gripping points struck up in groups of two or more, the base
of each point lying so as to form an angle other than a right angle with the long
axis of the strip substantially as and for the purpose described.
3. The metal strip substantially as and for the purpose described or illustrated
in the accompanying drawings.
Dated this 1st day of March 1899.