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Патент USA US2113202

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April 5, 1938.
,
|__ STANGE
2,113,202
AUTOMAT I C GUN
Filed Oct. 10, 1956
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Patented Apr. 5, 1938
2,113,202
UNITED STATES PATENT oFFicE _
2.113.202
' AUTOMATIC GUN
Louis Stange, Sommerda, Germany, assignor to>
Rheinmetall-Borsig Aktiengesellschaft, Dussel
dori', Germany, a corporation of Germany
Application Octpbel' 10, 1936. Serial No. 105,094
In Germany May 29, 1933
1 Claim. (Cl. 89-33)
This invention relates to automatic guns in
which the breech block in its forward motion
5
(
10
l5
a pin b2 a lever e which serves to push the car
tridges forward. The lever e is urged by a spring
pushes the cartridge from the supply device, ei to rotate in such a direction that its front end
such as a magazine or belt. into the barrel. Ac , projects from the side of the breech block. The
cording to the invention, the surface on the nose ez of _the lever e, therefore, projects towards 5
breech block which engages with the cartridge the cartridge f which is lying in the belt await
in order to load it into the barrel ls arranged so ing loading, so that when the breech block moves
as to be yieldable -in a direction transverse to backwards, the lever e is moved against the ac
the direction of movement of the block.
tion of the spring e1 and is pushed into the slot
By the invention _the cartridge belt or the mag
b1 as is shown in Fig. 2.
azine plate is advanced to feed a cartridge for
After the lever e has passed the rim of the
ward when a cartridge is pushed into the barrel cartridge f, it is freed and moved out of the slot
by the advancing breech block, whereas hither
by the spring e1 until its rear end bears on the
to this feeding motion of the belt or magazine base of the slot b1 (Fig. 3). As the breech block
could only occur after recoil. As a result of the now moves forward, the nose ez of the lever e,
invention an increase in the speed of ñre is made now bears on the cartridge base and pushes the
possible,- since the yielding surface of the breech
cartridge f from its holder f1 (Fig. 3) into the
block can engage with the foremost cartridge
earlier than heretofore, and the whole contents of
20 the magazine or belt can be advanced into the
cartridge chamber of the gun.l
In the example shown, in which the cartridges
are fed in the known half-open belt grippers, the
belt is advanced through the distance between
position'in which the leading cartridge is in the
path of the breech block. Furthermore, the fric
tion between the recoiling breech block and the
leading cartridge waiting to be loaded is less
25 than hitherto. In carrying out the invention,
the magazine or belt is given such a position in
the gun that the foremost cartridge which is
next to be loaded lies outside the path of the
rigid part of the breech block, and rests only in
30 that of the yielding surface.
The invention further makes it possible to
arrange that the breech block does not have to
advance the cartridge belt during its recoil move
ments. Failures in loading owing to insu?cient
35 recoil energy are thus avoided.
'I‘he belt is ad
vanced through the distance between adjacent
cartridges during the forward motion of the
breech block immediately after the leading car
tridge has been pushed from the belt, and the
40 next cartridge is already in position during the
iiring of the _previous charge to be engaged by
the yieldable member of the breech block, which
member slips over the cartridge when the breech
block recoils.
The invention is illustrated by the accompany
45
ing drawing in Which
Figs. 1-3 show longitudinal sections of a gun
in which the breech block is respectively in its
foremost intermediate and hindmost positions.
The breech block b is longitudinally movable
50
in the receiver a and can be bolted to the slid
ably mounted barrel c in known manner by a
locking collar d which is rotatable in guides in
the receiver. In a. slot b1 in the forward part of
55 the breech block b there is pivotally mounted on
0
adjacent cartridges by the forwardly moving
breech block immediately after the leading car
tridge has been pushed from vthe belt; that is
while the cartridge is being introduced into the 2
cartridge chamber. To do this the rear end of
the breech block b has ñxed to it a projecting
member In which is guided in a cam groove g1
formed in a controlling drum g which is mount
ed on the axle i oi’ the belt-advancing wheels h. 3o
The whole of the belt-advancing apparatus is ar
ranged in a housing k which can be placed on the
gun receiver and detachably secured thereto by
a spring catch I in such manner that it can be
easily removed. The controlling drum g is con- 35
nected to the sleeve h1 which carries the belt
advancing wheels h, by a unidirectional clutch
connection. The latter consists in saw-tooth
notches g2, ha. The pitch of these teeth corre
sponds to the inclination of the cam groove g1, 40
i. e. to the distance between adjacent cartridges.
When the drum g is rotated by the forwardly
moving breech block, the belt-advancing wheels
h are caused to rotate, while when the drum is
rotated in the reverse direction by the backward
ly moving breech block, the drum g moves rela
tively to the sleeve h1 as a-result of the forma
tion of the saw teeth g2, y which operate in the
usual manner. To make this relative movement
possible, the sleeve hi is axially movable on the
axle i against the action of a spring ha. In order
to avoid accidental rotation, further saw-toothed
notches h4 (Fig. 2) are provided on the end of the
sleeve h1 remote from the drum g, and these
prevent the sleeve from rotating, as a result of
2,113,202
block moves back. by their engagement with
lever e now meets the base of the cartridge f and
pushes it out of the holding member of the belt
counter teeth m which are secured on the cover
1c and are prevented from rotating by means of a
or the magazine groove. In a gun in which the
cartridges are fed by a belt, the projecting mem
the rotation of the drum g, when the breech
longitudinal guide member k1. On firing, the
ber be on the breech block begins, as soon as the
barrel c and the breech block bolted thereto by
the collar d recoil together. The collar dis then
rotated in known manner to release the breech
block While the latter moves rectilinearly; the
barrel c and collar d then come to rest while the
breech block c’ontinues to recoil. During the re
coil movement the projecting member b3 travers
cartridge has been removed from the belt grip
per, to traverse the cam groove U and during the
remainder of the forward movement of the
es the cam groove gi of the control drum a, and
rotates the latter. The sleeve h1 together with
15 the belt-advancing wheels, are, however, unaf
fected by this rotation of the drum in conse
quence of the action of the coupling members
g2, h2, h4, m, he.
After or during this idle rotation of the drum
20 g into the position from which it can advance the
..
25
breech block into the position of Fig. 1, advances
the belt through a distance corresponding to the 10
distance between adjacent cartridges in the belt.
Thus while one cartridge is being fired, the next
is already in a position to be moved forward by
the breech block, but the breech block experi
ences no load and can recoil freely.
I claim:
An automatic gun having a longitudinally
movably breech block, a pusher on said breech
block displaceable in a direction transverse to
the length of the breech block, a belt having half 20
open grippers carrying the cartridges, and means
for. advancing the belt controlled by the for
ward stroke of the breech block after the re
moval of the foremost cartridge from the belt
and delivering the next cartridge immediately in 25
the path of the pusher, the actuating means for
cartridge belt, the lever e projecting from the
surface of the breech block bears against the
cartridge f and is moved back thereby into the
groove b1 (Fig. 2) until the nose er has passed
the rim of the cartridge and it can return under
the action of the spring e1 into the operative
position seen in Fig. 3. The recoil of the breech
advancing the belt being removed inactive by
block now ends and, if the block is free to move
the rearward stroke of the' breech block in the
forward owing to the trigger being pressed, the
30 block is advanced -by the spring p which was
compressed during recoil.
The nose e2 of the
operative position for the next forward stroke of `
the breech block.
LOUIS STANGE.
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