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Патент USA US2134476

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Oct. 25, 1938.
J. HASEK
BREECH PACKING FOR FIREARMS
Filed March 6, 1936
Th}?
_ FF (1. 3.
i7 2
9
2,134,476 '
Patented Oct. 25, 1938
2,134,476
2,134,476
BREECH PACKING ‘FOR FIREARMS ‘
Jaroslav Hasek, Prague, '- Czechoslovakia
Application March 6, 1936, 'Serial
In Czechoslovakia March ‘8,1935
3 Claims.
This invention relates to breech packings for
?re-arms, and constitutes a further development
of and improvement on the breech packing
forming the subject matter of Patent No.
i)
2,117,885 (co-pending application Serial No.
52,819). In the said prior patent the packing is
in the form of a disc of deformable material
which is mounted on the breech block and so
shaped that the pressure of the gases generated
on the ?ring of the charge brings about an en
largement of the diameter of this disc which is
thereby caused to bear with its periphery against
the wall of the barrel. At the same time this
packing disc is suitably associated with the ex
15 plosive charge and is placed simultaneously with
the latter in the position for ?ring.
With the improvement according to the present
invention the packing element, which is in the
form of a disc made from deformable mtaerial, is
provided with means which are so designed and
arranged that the operations in loading and in
extracting the case after ?ring do not differ in
any respect from those required when using
standard ammunition with normal cartridge
25 cases. The construction according to the in
vention is such that no alterations or adapta
tions need be eifected to the ?re-arm itself, so
that it is perfectly possible in one and the same
?re-arm to use both the old and the new type
30 of ammunition.
In accordance with the invention this result
is achieved by providing beneath the packing
disc proper a rigid and non-deformable disc
(preferably of iron). Consequently the barrel
of the ?re-arm can be left unaltered in the im
mediate vicinity of the breech, and the means
for extracting the empty cartridge-case acts in
precisely the same manner with this new am
munition as with ordinary ammunition, while at
the same time any desired type of breech mecha
nism can be employed which is designedlfor use
with normal cartridge-cases.
Since the packing disc is corrugated or cam~
bered and only becomes effective as a packing
means after it has become deformed to a cer
tain extent, the connection of this disc with the
non-deformable backing disc must be such that
the deformation of the former is not impeded on
the ?ring of the charge.
Further details and features of the improved
breech packing according to the present inven
tion will become apparent in the course of the
ensuing description taken in conjunction with
55 the accompanying drawing in which a form of
(Cl. 89-26)
construction embodying the invention is shown,
by way of example, in Figs. 1 to 3.
In the drawing:
Fig. 1 is a fragmentary longitudinal cross
section through a breech packing constructed in
accordance with the invention, showing a special
con?guration of the packing seating surface on
the barrel of the ?re-arm.
Fig. 2 is a similar view, showing a modi?ed
form of the packing adapted for use in con 10
junction with any ?re-arm in which ordinary
cartridges maybe used; and
Fig. 3 is a similar view showing a further
modi?ed form of the packing disc.
In the form shown in Fig. 1 the barrel of the 15
?re-arm is provided with a ?ared packing seat
ing surface which differs from that required
when ordinary cartridge-cases areused. In this
?gure 2 denotes the deformable packing disc,
while 9 denotes the rigid-non-deformable back 20
ing disc which is connected to the former by
means of the screw joint IEI. In the screw
threaded boss there can be provided the deton
ating cap 3, and the entire assembly is mounted
in the end of the barrel l of the ?re-arm. l I de 25
notes the means for extracting the empty case
after ?ring.
In the form of construction shown in Fig. 2
it is necessary to strengthen the portion of the
rigid disc 9 extending into the bore of the barrel I 30
so that the deformable packing disc 2 bears at
a point which is not weakened by the extracting
means II.
In the form of construction shown in Fig. 3
the packing disc 2 is arched or cambered in a 35
manner different from that adopted in the pre
vious examples, and constitutes a continuous
spherical arch. As means of connection be
tween this packing disc 2 and the non-deform
able disc 9 these is again employed screw thread 40
ing I‘! on the inner periphery of the ?xed por
tion of the packing disc so that the threaded
joint does not impede the required deformation
of the packing disc on the spreading of this
latter. In order to ensure that the packing disc 45
becomes extracted simultaneously with the rigid
disc 9 the deformation of the packing disc is
caused to bring about interlocking engagement
between the two discs, for instance as shown
at l3 in Fig. 3. The backing disc can also be 50
provided with an aperture I6 for engagement
by a boss IS on the spreading disc, in which the
detonating cap or igniting charge ?nds accom
modation.
I claim:
55
2,134,476
2
1. A breech packing for ?re-arms, comprising
a packing disc composed of non-resilient deform
able material, said disc- being forwardly arched
and having a rearwardly extending interiorly
threaded ?ange, a rigid non-deformable backing
mally disengaged interlocking elements on said
disc and backing, said elements being adapted to
engage with each other when the deformable
disc straightens out upon ?ring, one of said
interlocking elements being an outwardly pro
behind said disc and provided with a threaded
portion engaging said ?ange threads, and nor
mally disengaged interlocking elements on said
a packing disc composed of non-resilient deform
disc and backing, said elements being adapted to
engage with each other when the deformable disc
straightens out upon '?ring.
2. A breech packing for ?re-arms, comprising -
a packing disc composed of non-resilient deform
able material, said disc being forwardly arched
15 and having a rearwardly extending interiorly
threaded ?ange, a rigid non-deformable backing
behind said disc and provided with a threaded
portion engaging said ?ange threads, and nor
" ‘minimum
jecting rim on said ?ange.
3. A breech packing for ?re-arms, comprising
able material, said disc being forwardly arched.
and having a rearwardly extending interiorly 10
threaded ?ange, a rigid non-deformable backing
behind said disc and provided with a threaded
portion engaging said ?ange threads, said back
ing having a “medial aperture and said disc
having a boss rearwardly extending into said 15
aperture, said boss being adapted to accom
modate at least a detonating cap.
JAROSLAV HAsEK.
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