Improvements in and relating to the Manufacture of Double Barrels for Fire Arms.
Year: 1896

page_text: Date of Application, 11th Apr., 1896
Complete Specification Left, 5th Jan., 1897-Accepted, 10th Apr., 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Manufacture of Double Barrels
for Fire Arms.
We, PAUL LOUIS OLIVIER DE GERENTE, of 14 Rue de Monceau, Paris, Civil
Engineer, and YVAN ARTHUR MARIE PROSPER GOUBAUX, of 71 Rue de la
Tour, Paris, Proprietor, both in the Republic of France, do hereby declare the
nature of this invention to be as follows:-
This invention relates to an improved method of manufacturing the double-
barrels of sporting and other fire arms without solder.
The object of our invention is to manufacture from a single piece, without the
use of solder, the double barrels of fire arms and the different parts appertaining
thereto, such as: the upper and lower part of the centre band, the prolongations at
the rear of the breech, serving to form the hooks, the attaching bolts, the tenon of
the triple bolt and so forth.
Our improved process consists in principle in successively passing the blank of
metal into a series of parallel grooves or channels of special shape, in such a
manner that all operations can be effected while the blank is always held at
right angles to the vertical axis of the rollers.
By this method of operation the double barrel and its different accessory parts
are always rolled in the longitudinal direction of the metal mass, this latter being
always worked upon in the same direction, by which operation a very great
stability is obtained; moreover the manufacture is effected very rapidly, from
which fact a great economy of workmanship results.
The double barrel thus constructed is finally straightened and completely roughed
down in a finishing apparatus.
Our improved apparatus is characterized by the combination :
1. Of a first rolling mill, the two rollers of which are provided with grooves of a
special shape, serving to form the double barrel.
2. Of a second rolling mill, placed in continuation of the preceding one, the two
rollers of which are provided with grooves so arranged as to form the breech and
the different accessory parts in the longitudinal direction of the blank or mass of
metal.
3. Of a finishing apparatus, in which the barrel is straightened and completely
roughened down; this apparatus is composed, in principle, of a roller and of a
moulding table, and comprises a special device for regulating its roller.
These different constituent parts receive their movement from a driving shaft
actuated by an appropriate motor.
The two rolling mills, one of which serves to form the double barrel and the
other the breech and the accessory parts, comprise each two rollers carried
respectively by standards which rest upon a frame.
The shafts of these rollers or cylinders each carry a tooth wheel in such a
manner that the lower roller drives the one above the same.
The lower shafts each carry a fly wheel and receive their movement from the
driving shaft through the medium of the engaging and disengaging clutches, or
any other appropriate arrangement.
Upon this driving shaft which rotates in bearings, a wheel is keyed which gears

page_text: motor.
proton mounted on an intermediate shaft, driven by any appropriate
The finishing apparatus comprises an upper roller and a table, in which a groove
is cut, which forms a kind of mould and completes in combination with the groove
of the upper roller the work of roughing down the double barrel and its accessory
parts.
In order that the pressure of the finishing roller may be regulated at will we
insert a wedge between the interior edge of the upper part of each of the brackets
or frames and the corresponding bearings, in which the shaft of this finishing roller
rotates.
It is clear that by this arrangement a more or less extensive play or interval will
be obtained between the finishing roller and the table, according to the extent to
which the wedges are inserted.
The finishing roller receives movement directly from its driving shaft through
the medium of an engaging and disengaging clutch. Upon this shaft which rotates
in bearings a wheel is keyed, gearing with a pinion mounted upon the intermediate
shaft hereinbefore specified, which receives its movement from any, appropriate
motor.
The finishing roller carries a wheel with angular teeth which gears with a
second wheel keyed upon a lower shaft. This latter is provided with two toothed
wheels which engage with the two longitudinal rack bars carried by the table upon
its lower surface, in such a manner that this table is longitudinally displaced at
the same time and with the same speed as the finishing roller. This latter also
carries a fly wheel.
The grooves of the two rollers of the rolling mills are interrupted upon ono part
of their circumference, in such a manner as to permit of easily engaging the blank
or mass of metal to be operated upon.
The development of the useful length of these grooves is slightly greater than
the length of the barrel used, so that the same turn of the rollers may serve for
various lengths of barrels.
The width and the depth of the different grooves taper and thus permit of
obtaining slightly conical barrels.
The rolling mills are moreover, on the side adjacent to the work, provided with
guides serving to guide the barrel when the same has been subjected to the action
of the grooves of the rollers.
The apparatus constructed as hereinbefore described operates as follows:-
The blank or mass of metal having been raised to the desired temperature is
successively inserted between the different grooves of the two rollers of the first
rolling mill, and subsequently between those of the second rolling mill; at each
change of the grooves the operator has to throw the machine out of gear by acting
upon the corresponding clutch.
Before each operation the rollers are brought to the required position permitting
of easily engaging the blank or mass between the grooves hereinafter indicated.
The operator first passes the metal mass or blank between the first grooves, then,
after having turned the same through an angle of 90 degrees between the second
grooves, he passes the same twice between the third and fourth grooves taking care
to always turn the blank through an angle of 90 degrees.
On leaving the fourth grooves the mass or blank has an octagonal section.
The mass is subsequently inserted between the two fifth grooves which commence
to roughly form the double barrel, then successively between the sixth and seventh
grooves finally between the eighth grooves which complete the outer shape of the
barrel.
The metal mass or blank is subsequently passed to the second rolling-mill, the
shape of the different grooves of which are constructed so as to form the accessory
pieces for example the hook, the upper part of the centre band in the part
corresponding to the breech, and the tenon for the triple-bolt.
The operator then passes the blauk, with its rear end directed forward, between

page_text: the ninth grooves or channels which roughly delineate the hook and the upper part
of the band and the rear prolongation, subsequently twice between the tenth
grooves or channels, care being taken that during the first passage the roughly
formed hook is made to engage the left hand interval which is larger, and
subsequently during the second passage the same is caused to engage the right
hand interval which is narrower; the moulding of the hook being then completed
by the eleventh grooves or channels, and finally the barrel is straightened by the
twelfth grooves or channels.
In all these successive operations the inetal mass or blank has always been held
at right angles with regard to the rollers, the operator thus works always before
the face of the rolling mills, by which a greater stability is obtained since the
metal is always worked upon in the same direction, further a saving of space is
secured and also greater facility and rapidity of operation.
The barrel of the gun, when leaving the last grooves or channels, is completely
roughed down by the finishing apparatus.
After the barrel has been placed upon the table into the groove the hook into
the hollow, the operator, by means of the clutch, throws the apparatus into gear,
the finishing roller rotates at the same time as the table advances, and the
combined action of the groove or channel of this roller and the groove of the
table, completes the action of roughing down the barrel and the different accessory
parts.
The barrel can then be subjected to the action of any appropriate press for the
purpose of completing the straightening operation of the same and is finally cut
down to the required length and bored according to the usual means employed for.
this purpose.
We may modify the arrangement of the channels or grooves and if necessary we
may add new ones, as the case may be.
The bands moulded simultaneously with the barrel extend over the entire length
of this latter or only over a portion of such length so as to diminish the total
weight and in this latter case, when making the hollows between the barrels, only
the necessary fastening points may be left."
The axes of the two barrels may also be arranged as close as possible, since our
process permits of obtaining a partition wall in common presenting a thickness not
exceeding that of the outer walls, from which also a diminution of the weight of
the gun and, moreover, a greater trueness of aiming is obtained.
It is evident that we may thus obtain barrels of any suitable calibre and
dimensions.
11000
HASELTINE LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.
Improvements in and relating to the Manufacture of Double Barrels
for Fire Arms.
We, PAUL LOUIS OLIVIER DE GÉTENTE, of 14 Rue de Monceau, Paris,
Civil Engineer, and YVAN ARTHUR MARIE PROSPER GOUBAUX, of 71 Rue de la
Tour, Paris, Proprietor, both in the. Republic of France, 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 an improved method of manufacturing the double-
barrels of sporting and other fire arms without solder.

page_text: The object of our invention is to manufacture from a single piece without the use
of solder, the double barrels of fire arms and the different parts appertaining.
thereto, such as: the elevated rib, the top lump, the lump, and so forth.
Our improved process consists in principle in successively passing the blank of
metal into a series of parallel grooves, or channels of special shape, in such a
manner that all operations can he effected while the blank is always held at right
angles to the vertical axis of the rollers.
By this method of operation the double barrel and its different accessory parts
are always rolled in the longitudinal direction of the metal mass, this latter being
always worked upon in the same direction, by which operation a very great stability
is obtained; moreover the manufacture is effected very rapidly, from which fact
a great economy of workmanship results.
The double barrel thus constructed is finally straightened and completely roughed
down in a finishing apparatus.
Our improved apparatus is characterized by the combination:
1. Of a first rolling mill, the two rollers of which are provided with grooves of
a special shape, serving to form the double barrel.
2. Of a second rolling mill, placed in continuation of the preceding one, the two
rollers of which are provided with grooves so arranged as to form the breech and
the different accessory parts in the longitudinal direction of the blank or mass of
metal.
3. Of a finishing apparatus, in which the barrel is straightened and completely
roughed down; this apparatus is composed, in principle, of a roller and of a
moulding table, and comprises a special device for regulating its roller.
These different constituent parts receive their movement from a driving shaft
actuated by an appropriate motor.
In order to enable the invention to be clearly understood we have represented
the same in principle, and by way of example only in the accompanying drawing,
which shows an apparatus for carrying our improved manufacturing process into
practice.
Figure 1 is a frout view of the whole apparatus.
Figure 2 is a transverse section of the rollers.
Figure 3 is a side or end view of the finishing apparatus.
Figure 4 shows in plan and in longitudinal section on the line 1-2, the table of
this finishing apparatus.
Figures 5, 6, 7, 8, 9, 10 and 11 show the different steps in the rolling of the
blank or mass of metal.
In these different figures similar reference letters refer to similar parts.
The two rolling mills, one of which serves to form the double barrel and the
other the breech and the accessory parts, comprise each two rollers a b, a¹ b' carried
respectively by standards c c which rest upon a frame d d¹.
The shafts of these rollers or cylinders each carry a tooth wheel e fe' f' in such
a manner that the lower roller drives the one above the same.
The lower shafts each carry a fly wheel g g' and receive their movement from
the driving shaft through the medium of the engaging and disengaging clutches i i¹
or any other appropriate arrangement.
Upon this driving shaft h which rotates in bearings j, a wheel k is keyed which
gears with a pinion mounted on an intermediate shaft, driven by any appropriate
motor.
The finishing apparatus comprises an upper roller and a table m, in which a
groove n is cut, which forms a kind of mould and completes in combination with
the groove of the upper roller the work of roughing down the double-barrel and
its accessory parts.
In order that the pressure of the finishing roller may be regulated at will, we
insert a wedge o between the interior edge of the upper part of each of the brackets
or frames p and the corresponding bearings, in which the shaft of this finishing
roller rotates (Figure 3).
"

page_text: It is clear that by this arrangement a more or less extensive play or interval will
be obtained between the finishing roller and the table, according to the extent to
which the wedges o are inserted.
The finishing roller receives movement directly from its driving shaft h¹
through the medium of an engaging and disengaging clutch q. Upon this shaft
which rotates in bearings j a wheel k¹ is keyed, gearing with a pinion mounted
upon the intermediate shaft herein before specified, which receives its movement
from any appropriate motor.
The finishing roller carries a wheel with angular teeth which gears with a
second wheels keyed upon a lower shaft t. This latter is provided with two
toothed wheels u which engage with the two longitudinal rack bars v carried by
the table m upon its lower surface, in such a manner that this table is longitudinally
displaced at the same time and with the same speed as the finishing roller l. This
latter also carries a fly wheel w.
The grooves of the two rollers a, b, a', 6' are interrupted upon one part of their
circumference, as shown in Figures 1 and 2, in such a manner as to permit of easily
engaging the blank or mass of metal to be operated upon.
The development of the useful length of these grooves
slightly greater than
the length of the barrel used, so that the same turn of the rollers may serve for
various lengths of barrels.
The width and the depth of the different grooves taper and thus permit of
obtaining slightly conical barrels.
The rolling mills are moreover on the side which lies opposite the work, provided
with guides serving to guide the barrel blank while the same is being subjected to
the action of the grooves of the rollers.
The apparatus constructed as herein before described operates as follows:-
The blank or mass of metal having been raised to the desired temperature is
successively inserted between the different grooves of the two rollers a and b of the
first rolling mill, and subsequently between those of the rollers a¹ of the second
rolling mill; at each change of the grooves the operator has to throw the machine
out of gear by acting upon the clutch i or i¹.
Before each operation the rollers a band a 6' are brought to the required
position permitting of easily engaging the blank or mass between the grooves
hereinafter indicated.
The first operation consists in roughing down the blank and is effected as
follows.
The operator first passes the metal mass or blank between the first grooves l, so
as to form two opposite edges, then, after having turned the blank through an
angle of 90 degrees it is passed between the second grooves 2, so as to form
two other edges after which it is passed between the grooves 3 and 4, care
being taken to turn the blank through an angle of 90 degrees in each case, so as to
reduce the roughed down blank to the required dimensions and to bring it to the
octagonal shape represented in Fig. 7.
The second operation which consists in shaping the barrel is effected as follows.
The roughed down blank is passed between the grooves 5, for the purpose of
forming the double barrel, then successively between the grooves 6 and 7 in order
to give the barrel its shape all over its periphery and finally between the grooves 8,
which effects the separation of the two barrels. On leaving the grooves 8, the
double barrel presents the shape shown in Figure 8.
The blank which has received the form of the double barrel, is passed between
the grooves of the second rolling mill, for the purpose of delineating the hook A,
the upper band or elevated rib B and the rear extension or top lump C as shown
in Figure 9; subsequently the blank is passed between the grooves 10 for the
purpose of forming the lump A, care being taken that during the passage the
delineated lump is caused to engage with the left hand intermediate space which is
wider, and subsequently during the second passage, with the right hand intermediate
space, which is narrower.

page_text: The blank is subsequently passed between the grooves 11 in order to complete
the moulding of the hook and then between the grooves 12 for the purpose of
straightening the barrel (Figure 10).
The barrel is then completely roughed down (Figure 11), by means of the
finishing apparatus.
In all these successive operations the metal mass or blank has always been held
at right angles with regard to the rollers, the operator thus works always before
the face of the rolling mills, by which a greater stability is obtained, since the
metal is always worked upon in the same direction, further a saving of space is
secured and also greater facility and rapidity of operation.
The barrel of the gun, when leaving the grooves or chaunels 12, is completely
roughed down by the finishing apparatus.
After the barrel has been placed upon the table m into the groove n,
the lump
into the hollow a the operator by means of the clutch 9, throws the apparatus into
gear, the roller Z rotates at the same time as the table m advances and the combined
action of the groove or channel of this roller and the groove n of the table,
completes the action of roughing down the barrel and the different accessory parts.
The barrel can then be subjected to the action of any appropriate press for the
purpose of completing the straightening operation of the same and is finally cut
down to the required length and bored according to the usual means employed for
this purpose.
We may modify the arrangement of the channels or grooves and if necessary we
may add new ones, as the case may be.
The bands or ribs moulded simultaneously with the barrel extend over the
entire length of this latter or only over a portion of such length so as to diminish
the total weight and in this latter case when making the hollows between the
barrels, only the necessary fastening points may be left.
The axes of the two barrels may also be arranged as close as possible, since our
process permits of obtaining a partition wall in common presenting a thickness
not exceeding that of the outer walls, from which also a diminution of the weight
of the gun and, moreover, a greater trueness of aiming is obtained.
It is evident that we may thus obtain barrels of any suitable calibre and
dimensions.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
The improved method of manufacturing double-barrels, for sporting and other
fire arms, without solder, the characteristic feature consisting in the combination
and special arrangement:
(1.) Of a first rolling mill serving to roughly form the exterior shape of the
double barrel.
(2.) Of a second rolling mill, the faces of the various grooves or channels of
which are so calculated and arranged as to form the breech and the various accessory
parts.
(3.) Of a finishing apparatus serving to straighten and to complete the finishing
of the barrel, and being provided with a special regulating or adjusting device; the
metal blank being always placed perpendicularly to the rollers and being conse-
quently always operated upon in the same direction, in principle, substantially as
herein before described with reference to the accompanying drawing and for the
purpose specified.
Dated this 5th day of January 1897
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.