IMPROVEMENTS IN MELTING AND BORING CAST-STEEL BARRELS APPLICABLE TO FIRE-ARMS AND PIECES OF ORDNANCE
Year: 1862

page_text: LETTERS PATENT to Gustave Fuhrmann, of No. 15, Passage des Petites
Ecuries, in the City of Paris, in the Empire of France, Merchant, for
the Invention of "IMPROVEMENTS IN MELTING AND BORING CAST-STEEL
BARRELS APPLICABLE TO FIRE-ARMS AND PIECES OF ORDNANCE."-A com-
munication from Frederick Lohmann, Manufacturer, of Witten, in
Westphalia, in the Kingdom of Prussia..
Sealed the 7th November 1862, and dated the 12th May 1862..
PROVISIONAL SPECIFICATION left by the said Gustave Fuhrmann at the
Office of the Commissioners of Patents, with his Petition; on the 12th
May 1862.
I, GUSTAVE FUHRMANN, of No. 15, Passage des Petites Ecuries, in the City
of Paris, in the Empire of France, Merchant, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN MELTING AND BORING CAST-STEEL
BARRELS APPLICABLE TO FIRE-ARMS AND PIECES OF ORDNANCE," a communication
from Frederick Lohmann, Manufacturer, of Witten, in Westphalia,, in the:
Kingdom of Prussia, to be as follows:-
The difficulties which arise in boring cast steel are easily comprehended?
from the fact that, no matter what the quality of the steel, grains are always-
met with which resist the action of the boring instrument, and cause it to deviate..
The means hitherto employed only partially remedy this defect, and are long.
and costly. The object of this Invention is to make the cause of this evili

page_text: disappear, its effects necessarily disappearing with it, and the process by which
this object is, attained consists in introducing into the centre of the piece or
ingot to be cast in the mould or ingot mould which is to receive it a core,
composed of any malleable metal easily pierced by the boring instrument.
This core naturally forms one body with the steel thus cast, and like it,
spreads in the subsequent operations of forging and rolling, but always
preserves the central point and a diameter, which will suffice for the ulterior
operation. It is evident that the boring taking place, firstly, in this malleable
material will always be effected under normal conditions, and that the borer
may be guided in a straight line without possible deviation, also that this first
operation ended, it is easy to continue the boring with the same precision.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Gustave Furhmann, in the Great Seal Patent Office on the
8th November 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GUSTAVE
FUHRMANN, of No. 15, Passage des Petites Ecuries, in the City of Paris, in
the Empire of France, Merchant, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of May, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Gustave Fuhrmann, Her special licence that I, the said Gustave
Fuhrmann, my executors, administrators, and assigns, or such others as I,
the said Gustave Fuhrmann, my executors, administrators; and assigns,
should at any time agree with, and no others, from time to time and at
all times thereafter during the term therein expressed, should and lawfully
might make, 'use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN MELTING AND BORING CAST-STEEL BARRELS APPLICABLE TO
FIRE-ARMS AND PIECES OF ORDNANCE," (a communication from Frederick Loh-
mann, Manufacturer, of Witten, in Westphalia, in the Kingdom of Prussia,)
the condition (amongst others) that I, the said Gustave Fuhrmann,
my executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and ascer-
tain the nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
upon

page_text: within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Gustave Fuhrmann, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The difficulties which arise in boring cast steel may be easily comprehended
from the fact, that however fine the quality of the steel, grains are always met
with which resist the boring instrument or drill, causing it to deviate, and
the means hitherto adopted only partially remedy this defect, while occupying
much time and being very costly. And the object of the improved method of
casting and boring the barrels of fire-arms, ordnance, and other pieces of steel,
which forms the subject of this Invention, is to do away with the cause of the
evil, its effects necessarily disappearing with it, so that the drilling or boring
may be effected with the greatest facility, and without possibility of deviation.
The advantages of this process, which is of the greatest simplicity, will con-
sequently be readily appreciated. It consists in introducing into the centre of
the piece or ingot to be cast in the mould or ingot mould a core composed of
any malleable metal easily pierced by a drill or boring instrument. This core
naturally forms one body with the steel thus cast, spreading with it in the
subsequent operations of forging and rolling, but always preserving the central
point and a diameter, which will suffice for the ulterior work. It will be
evident that the boring or drilling taking place, firstly, in this malleable
material is effected under normal conditions, and that the drill or boring
instrument may be guided in a straight line without possible deviation; it will
also be evident that this first operation ended, the boring is easily continued
with the same precision.
Having now described the nature of the said Invention, and the means by
which it is carried into practical effect, I desire it to be understood that I
claim the introduction into the centre of a piece or ingot of steel about to be
cast of a core of any malleable metal easily pierced by a boring instrument.
In witness whereof, I, the said Gustave Fuhrmann, have hereunto set
my hand and seal, this Fifth day of November, in the year of our
Lord One thousand eight hundred and sixty-two.
GUSTAVE FUHRMANN. (L.B.)