A New or Improved Process for the Production of Damasoened Metal Bars for use in the Manufacture of Fire Arm Barrels.
Year: 1891

page_text: Date of Application, 26th Aug., 1891.
Complete Specification Left, 23rd June, 1892-Accepted, 30th July, 1892:
PROVISIONAL SPECIFICATION!
A New or Improved Process for the Production of Damasoened
Metal Bars for use in the Manufacture of Fire Arm Barrels.
I HENRI PIEPER of No. 12 Rue des Bayards Liege in the Kingdom of Belgium
Manufacturer do hereby declare the nature of this invention to be as follows:
This invention relates to a process for the production of damascened metal bars
employed in the manufacture of gun or fire arm barrels and enables the damascening
effent to be obtained in the rolling process as hereinafter explained.
With this object a number of sheets of metal of different degrees of hardness are
packed together in a pile and this pile or packet of sheets is subjected to a rolling
process whereby it is formed into one solid plate or sheet. The plate or sheet thus
obtained is then worked up into a bar preferably by rolling or folding and welding
the parts together and this bar is reduced by a suitable rolling process to a bar of
suitable thickness for the manufacture of gun barrels.
By suitably treating or preparing the sheets originally employed in making up
the pile or packet or the sheet or plate obtained therefrom a damask of any desired
pattern may be obtained in the bar ultimately produced.
With this object the said sheets. or plates are operated upon in such a manner as
to produce an uneven surface by embossing, rolling or otherwise treating them in
such a manner as to produce corrugations or other projections or depressions therein
or thereon according to the nature of the damascening which it is desired to obtain
in the product.
Dated this 26th day of August 1891.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
A New or Improved Process for the Production of Damascened
Metal Bars for use in the Manufacture of Fire Arm Barrels.
I, HENRI PIEPER of 12 Rue des Bayards, Liege, in the Kingdom of Belgium,
Manufacturer, do hereby declare the nature of my invention and in what manner
the same is performed to be particularly described and ascertained in and by the
following statement :-
This invention relates to a process for the production of damascened metal bars
employed in the manufacture of gun or fire arm barrels and enables the damascening
effect to be obtained in the rolling process as hereinafter explained.
With this object a number of sheets of metal of different degrees of hardness are
packed together in a pile and this pile or packet of sheets is subjected to a rolling
process whereby it is formed into one plate or sheet. The plate or sheet thus
obtained is then worked up into a bar preferably by rolling or folding and welding
the parts together and this bar is reduced by a rolling process to a bar of suitable
thickness for the manufacture.of gun or fire arm barrels.
By suitably embossing the sheets originally employed in making up the pile or
packet or the sheet or plate obtained therefrom a damask of any desired pattern
may be obtained in the bar ultimately produced.
In order to make this Specification more easily intelligible reference is had to
the accompanying drawings in which similar lotters denote similar parts throughout
the several views.
Fie 1 shows the arrangement of the plates one over the other.
ד

page_text: Figs. 2 and 3 show the plates after having been rolled out.
Figs. 4 and 5 show the said plate after having been folded up and wolded to form
a bar.
T
Figs. 6 and 7 show the bar after it has been welded and rolled out to the
approximate size.
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Figs. 8-17 show modifications consisting of embossed plates.
m
Steel and iron plates se say about 10 in number are laid alternately one on the
other to form a pile or packet A of about 5 inches thickness (Fig. 1). This packet
is then welded and rolled out-in a direction parallel to the layers, to a plate B
of about 3 thickness (Figs. 2 and 3) in which the layers still occupy the
same position as at first. This plate is then rolled or folded round a steel or iron
bar S (Figs. 4, 5) which is advantageously of such diameter as to allow the plate
to be wound round it about 15 times, thus producing a body K consisting of
150 layers of alternating steel and iron plates; this mass or body K is then welded
and rolled out to a rod L' (Figs. 6, 7) having a diameter corresponding to that of
the barrel of fire arms. This rod consists of 150 concentric layers of steel
and iron alternately and according to the varying' thickness of these layers the
harder metal will be more or less pressed into the softer layers on both sides.
of it thus forming a damask the delineation of which would show a most peculiar
character.
When the plate is embossed previous to being wound on the rod S, for instance if
it is provided with horizontal, vertical, slanting or parallel grooves and transverse
grooves, such grooves forming embossments on the reverse side and thus inter-
rupting the plane of the layers at certain points, various regular delineations, will
be obtained if the plate thus embossed is rolled round the bar S in such manner
that the embossments close into the depressions.
The rods thus produced are cut up into the required lengths, forged conical,
bored out so that the metal of the rod S is removed, and then subjected to the
usual treatment of steel barrels.
The rods may, if so desired; be kept larger in diameter than that of the barrels,
and pieces cut off therefrom corresponding in weight to that of the barrel, such
pieces being then bored out, placed on a mandrel and drawn out to the requisite
length.
Figs. 8, 10 and 12 show an embossed plate having simple vertical grooves b. In
Figs. 9, 11 and 13.the plate is embossed with diagonal and transverse diagonal.
grooves b¹ b³.
1
Figs. 14 and 17 show the patterns on the corresponding barrels previous to their
being turned down.
Figs. 15 and 16 are two barrels not yet turned down, which may be produced by
employing plates having horizontal or diagonal' embossments.
Having now particularly described and ascertained the nature of my inven-
tion and in what manuer the same is performed, I declare that what I claim is :
1. A process for producing damascened bars for the manufacture of fire arm
barrels consisting in first laying plates varying in hardness alternately one on the
other to form a pile or packet, then welding and rolling out the same to form.
plate, then rolling or folding the plate thus formed round a metal bar welding the
whole to form a rod and rolling the latter out to a diametor requisite for the fire
arm barrels, substantially as described.
2. As a modification of the process covered by Claim 1. embossing the composito
plate previous to its being rolled or folded round the metal bar S.substantially as
described.