Year: 1889

page_text: I, HANS WEIGEL of Bale, Switzerland, Gunsmith, do hereby declare the nature of
this invention and in what manner the same is to be perforined to be particularly
described and ascertained in and by the following statement :-
Ordinary sporting guns have the disadvantage that only cartridges with shot can
be used therewith, so that the sportsmen are obliged to carry additional guns if they
desire to fire with bullet cartridges.
The object of the present invention is to obviate this inconvenience. It consists
essentially in a short inner barrel which the sportsman can conveniently carry in his
hunting pouch, and, at the required moment, can easily and rapidly introduce into the
barrel of his gun.
This inner barrel fits accurately into the rear part of the gun barrel and is provided
with a cartridge chamber and rifling grooves.
The construction of the inner barrel will be readily seen from the accompanying
drawing in which Fig. 1 shews a longitudinal section of the gun barrel with the
inner barrel and Figs. 2 and 3 are cross sections on the lines XX and Y Y of Fig. 1.
Figs. 4 and 5 show in addition respectively a side view and an end view of the
detached inner barrel.
As shewn at Fig. 1 the projecting annular rim a of the inner tube A lies in the
recess g of the barrel B in which, when firing with shot cartridges, the base rim of
the cartridge lies.
The inner barrel A is about from 25 to 27 C.M. (9 inches to 10 inches) long,
and may be divided into three parts, namely: a, the cartridge chamber b, into which
the bullet cartridge c is introduced, and which corresponds accurately to the form
thereof; b, the part provided with rifling grooves; C, the cylindrical part 6³ the
length of which is a few centimetres less than the half of the length of the inner
harrel

page_text: The latter part is about 26ths millimetres (0.0078 inch) smaller in diameter than the
rifled part 6', so that the gases generated on firing are retained by the bullet and
cannot pass to the front of the latter.
Furthermore, the slightly narrower part 6 has the object of keeping the bullet
accurately in the axial line of the bore of the barrel at the moment when it passes
from the barrel A through the barrel B, the length of the barrel A being only
about d or th the length of the gun barrel B.
At the rim a the inner barrel has an inclined notch d which enables the empty
cartridge case to be drawn out after firing.
Such inner barrels can be used for all kinds of sporting guns (Lefancheux
Lancaster &c.) and with all kinds of cartridges, whether with central or pin fire or
with rim fire.
As every sportsman can readily carry such an inner barrel in his hunting pouch he
can easily render his gun suitable for deer stalking or chamois hunting by simply
introducing the inner barrel into the gun barrel. Lastly it is to be observed that on
account of the short length of the inner barrel the introduction thereof into the gun
barrel can always be effected without difficulty, as the deposit from the fired charges
which may adhere to the barrel, mostly collects in the front half of the barrel.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
An inner barrel A for sporting guns of all kinds which is introduced into the rear
part of the gun barrel B of which it occupies about 3rd or 4th the length, and which
consists of a cartridge chamber b with notch d, a rifled part 6', and a smooth part 2 of
slightly reduced diameter, as herein described and shewn on the accompanying drawing.
Dated this 10th day of April 1889.
ABEL & IMRAY,
Agents for the Applicant.