Improvements in the Manufacture of Double Barrelled Small Arms
Year: 1895

page_text: Date of Application, 4th May 1895
Complete Specification Left, 4th Feb 1896-Accepted, 28th Mar,
1896
PROVISIONAL SPECIFICATION
Improvements in the Manufacture of Double Barrelled Small Arms
I, ERNEST PIERRF AUBANFL, 27 Rue St Quentin, Paris, France, Inventor do
hereby declare the nature of this invention to be is follows
Heretofore the barrels of double barrelled small arms have been made separately
and then welded together thus involving considerable labour and expense and the
ril of an imperfect weld To obte these disadvantages I manufacture such
barrels in a single piece by means of a moulding press consisting of a pair of
grooved cylindrical moulds mounted in frame and operated in conjunction with
suitable rollers by means of toothed gearing
By this means I dispense with the operation of welding and so materially reduce
the cost of manufactur
0 M
100-
ELT & Co,
Registered Patent Agents, 43 Southampton Buildings, London,
Agents for Applicant
DRAWINGS
Figure 1, front elevation of the moulding press complete
Figures 2, 3, transverse sections of grooved cylindrical moulds D
Figure 4, transverse section of laminating rollers D
Figure 5, end elevation of moulding press
Figures 6, 7, 8, 9, shew various forms of double barrels made according to my
invention.

page_text: Figure 10, shows 1 double barel having a recess formed between the birrels to
facilitate the operation of finishing such barrels, after which they are strengthened
by cross ties to prevent vibration
A is a frame having standards_bb -cc which serve to carry the grooved
cylindrical moulds D and cylindrical mould I Laminating rollers E are keyed to
the spindles carrying the grooved moulds D The operating mechanism is placed
between the standards bbc c and consists of two driving wheels a and a pinion B
which gears into toothed wheel C mounted on spindle M furnished with
serrated discs m which take into corresponding sliding discs m', fitted in spindles p
earned in the standards b c A pinion petuates a rich e direct, and indirectly
operates the cylindrical mould I wlule second pinion q¹ imparts motion to the
grooved cylindrical moulds D The circumference of these latter is equivalent to
the length of the largest barrels, so that one set of such moulds is sufficient to
make every size of birrel, while on the contrary the circumference of the grooves
in the mould I corresponds to the length of the particular barrel to be produced,
and therefore separate mould is required for each separate size of barrel
The operation of my invention is as follows -I take a piece of metal and after
heating the same I pass it through the grooved cylinders D until it assumes the
shape of a double barrel with the lump o faintly developed At eich change of
groove it is necessary to disengage the cylinders to place the barrel in the next
groove atter which they are coupled up agun I then cheat the barrel and
extend and shape the lump o by means of the luminating rollers D, the peripheries
whereof have suitable recesses formed therein, as shewn it Figuro 4
I then again
reheat the bariel and place it in the moulding box H formed in the rich e, with the
lump o in the recess e¹ The moulding box corresponds with the mouldings in the
cylinder I, so that on operating the machine the barrel is moulded to the required
form
By my invention all kinds of double bariels for double bairelled small arms may
be made, and such barrels after being manufactured in the rough, are bored and
finished in any ordinary and well known manner It will be readily understood
that double birrels so made, being in a single piece, are very homogeneous and
strong and combine the two essential advantages of solidity and safety united with
a great economy in the cost of manufacture
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, 1 declare that what
I claim is
-
1 As a new article of manufacture, a double barrel for small arms made in
single piece all substantially as hereinbefore described and shewn
2 The improvements in the manufacture of double barrelled small arms all
substantially as herembefore described and shewn
Dated this 4th day of February 1890
Dated this on day of February ToJO
ELT & Co,
Registered Patent Agents, 43, Southampton Buildings, Holborn, London,
Agents for Applicant