Year: 1886

page_text: АГШЬ ІЩО АГшь ототапеr cauoго.
I, EDMOND SECHES, of 1, Boulevard Saint-Denis, Paris, France, Manufacturer, do
hereby declare the nature of said Invention to be as follows:-
My Invention relates to an improved method of converting rifles, and other small.
arms, into arms of smaller calibre.
As an example, I will suppose that it be desired to convert a rifle, having a
calibre of 11 m/m into one having a calibre of 8 m/m
m'
葡
To obtain this result I take a steel tube, having an external diameter of 16 m/m
and an internal diameter of 12 m/, I cut it into suitable lengths and form a tang,
tongue or spike at one of its ends. I next pass over it a series of three draw-plates,
one after the other, taking care to stop the draw-plate each time, at a marked point
on the tube and then to withdraw it. I thus reduce the tube. The breech end of
the tube then assumes somewhat the form it is desired to give it.
The barrel
The fitting in place of this tube is effected in the following manner:
having been previously bored to 12 m/m 2, at its cylindrical part, and the breech
having also undergone a boring with a blade whose section is exactly like that of the
cartridge to be used, but having a diameter of 16 / at the cylindrical part, the
tube is introduced into the barrel and is driven into place by means of a wooden
mallet.
ם
I commence by causing the cylindrical portion of the tube to cohere by passing
through the same 3 or 4 steel "olives," the last giving the exact calibre of the 8 m/m
then I secure the tube in the breech by confining this latter in a swage or mould
which takes exactly its external form, and by forcibly introducing into the tube a
steel punch or mandrel of the exact size and form of the cartridge, I thus obtain a
barrel reduced to 8"/m
The tubing proper being completed, it now only remains to effect the finishing,
that is to say to polish and rifle the barrel, equalize the chamber, &c, all usual and
ordinary operations.
The improved tubing may be applied to all existing small arms capable of being
80 converted,

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An Improved Method of Converting Rifles and other Small
Arms into Arms of Smaller Calibre.
☑
I, EDMOND SÈCHES, of 1, Boulevard Saint-Denis, Paris, France, 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, reference, being had to the accompanying drawings and to the letters
"and figures marked thereon, that is to say:-
[
My invention relates to an improved method of converting rifles and other small
arms into arins of smaller calibre.
As an example I will suppose that it be desired to convert a rifle having a calibre
of 11 m/m into one having a calibre of 8 ™/
m
To obtain this result I take a steel tube having an 'external diameter of 16 "/
and an internal diameter of 12 / I cut it into suitable lengths and form a tang,
tongue or spike at one of its ends. I 'next pass over it à. series of three draw-
plates, one after the other, taking care to stop the draw-plate each time at a marked
point and then to withdraw it. I thus reduce the tube a, according to the dotted
lines 1. 2. 3. 4. indicated in figures 1 and 2 of the drawings. The base b, of the
tube a, then assumes somewhat the form it is desired to give to it, and which is
represented in figs. 1. 2 and 3, and in full size in figs. 4 and 5.
The fitting in place of this tube a, into the barrel c, is effected in the following
manner.
The barrel having been previously bored to 12.2 "/_, at its cylindrical part, and
the breech having also undergone a boring with a suitable tool or blade whose
section is exactly like that of the cartridge shewn in fig. 8, bu̟t having a diameter
of 16 / at the cylindrical part, the tube a, is introduced into the barrel c, and is
driven into place by means of a wooden 'mallet.
m
I commence by causing the cylindrical portion of the tube to cohere by passing
through the same 3 or 4 olive-shaped steel plugs, the last one giving the exact
calibre of the 8 / I then secure the 'tube in the breech by confining this latter
in a swage or mould which takes exactly its external forms and by forcibly
introducing into the tube a steel punch or mandril of the exact size and form of
the cartridge h, shewn in fig. 8. I thus obtain a barrel reduced to 8 "/m, which is
shewn in full size in figs. 6 and 7.
m'
The so called tubing being completed, it now only remains to effect the finishing,
that is to say to polish and rifle the barrel equalize the chamber, &c, all usual and
ordinary operations.
Fig. 9, shews in longitudinal section, and in half full size, a rifle converted as
above explained.

page_text: My improved tubing may be applied to all existing small arms capable of being
BO converted.
Having now described my Invention and in what manner the same may be
carried into effect I claim
The improved method of converting rifles, and other small arms, into arms
of smaller calibre, substantially as herein before described and as shown in the
drawings.