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Патент USA US2131716

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Sept. 27, 1938.
M. A. BROWNING
2,131,716
DETACHABLE BARREL CONSTRUCTION FOR FIREARMS
Filed Jan. 14, 1937
2 Sheets-Sheet l
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17/71/5273 02”
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Sept. 27, 1938. -
M. A. BROWNING
2,131,716
DETACHABLE BARREL CONSTRUCTION FOR FIREARMS
Filed Jan. 14, 1937
Mara/W52”
5y 1/
2 Sheets-Sheet 2
2,131,716
Patented Sept. 27, 1938
UNITED‘ STATES mar
FFECE
2,131,716
DETACHABLE BARREL CONSTRUCTION FOR
'
FIREARMS
Marriner A. Browning, Ogden, Utah, assignor to
J. M. & M. S. Browning Company, Ogden,
'Utah, a corporation of Utah
Application January 14, 1937, Serial No. 120,577
14 Claims. (CI. 42—75)
‘ \One object of the invention is to provide a ?re
arm with handle means positioned at, or approxi
mately at, the center of gravity of the firearm,
and mounted on the gun so as to be movable to
- and from a ?rearm carrying position.
Another object is to provide a ?rearm and
‘movable carrying handle with cooperating means
for limiting the relative movement of the two.
_ _
Another object of the invention is to provide
m a handle device of the character set forth which
will be out of the line of sight and in a position
not to interfere with ?ring when attached to the
firearm and not in use.
Another object of the invention is to provide
is: such a handle device which will be simple in op
eration, inexpensive to manufacture, and light
in weight.
From the following description other and more
speci?c objects of the invention will be readily
apparent to those skilled in the art.
‘ In the drawings I have shown the embodiment
which I now deem preferable, but it will be un
derstood that these drawings are intended for
illustrative purposes only and are not to be relied
upon as limiting or defining the scope of the in
vention, the claims forming a part of this speci?
cation being relied upon for that purpose.
In the drawings:
Fig. l is a side elevation of a ?rearm incorporat
39 ing. the invention.
. Fig. 2 is a plan View of the ?rearm shown in
Fig. l, the handle devicebeing shown in alterna
tive positions in dotted lines.
_ Fig. 3 is an enlarged cross sectional view taken
35‘ on the line 3—-3 of Fig. 1.
‘
Fig. 4 is a side elevation of the forward por
tion of the ?rearm shown in Fig. l, the piston
tube being shown in its rearward position.
‘Fig. 5 is a view similar to that of Fig. 4 but
49 with the firearm barrel in a position permitting it
to be longitudinally removed from the gun.
Fig. 6 is an enlarged cross sectional view taken
on the line and in the direction of the arrows
6-6 in Fig. 5.
45
Fig. 7. is an enlarged cross sectional view taken
on the line and in the direction of the arrows
'!--'l in Fig. 5, the outline of the lower portion of
the ?rearm being shown in dotted lines.
Fig. 8 is a view similar to Fig. 7 but showing
503 the handle device in another position.
Fig. 9 is an enlarged fragmentary side view of
the ?rearm breech casing, barrel, and handle
device after disconnection of the barrel from the
55 i7
breech casing.
10 is an enlarged cross sectional view of
the handle device, a fragment of the ?rearm bar
rel being shown in dotted lines.
I have illustrated the invention as applied to
an automatic ri?e and it is particularly adapted ,
for use with this type of ?rearm, although it is ‘5
obviously not so limited and may be used with
other types of ?rearms. A rifle of this type is
generally indicated at l and comprises a barrel 2,
breech casing 3, stock 4, cartridge magazine 5
and piston tube 6. The piston tube 6 may be slid- ‘1Q
ably connected at its forward end with the barrel
and the connection may take the form more fully
shown in Fig. 3. The piston tube is shown as
being provided with an end portion '1 having a
‘ ‘
T~shaped groove 8 therein adapted to cooperate 15‘
with a T-shaped projection 9 on the barrel. The
barrel and portion 1 of the piston tube have co
operating gas passages it and ii therein through
which gases of explosion may be led to the piston
tube to actuate a piston (not shown) which in 20
turn operates the breech mechanism in a known
manner. Pivotally connected with the breech
casing and piston tube are the pivotally connected
levers l2 and [3 which may be used to slide the
piston tube longitudinally of the barrel to connect 25
or disconnect the end portion ‘I with respect to the
barrel. A bipod I4 is shown as secured to the
?rearm and may be used as a rest when the gun
is being ?red.
In accordance with one phase of the invention 30
the barrel is connectible to and disconnectible
from the breech casing by relative rotation of the
two in order to render possible the substitution of
a different barrel if desired for any reason. When
the firearm is in use the barrel becomes heated 35
due to ?ring and it may become so hot as to
preclude grasping it with a bare hand to rotate
it with respect to the breech casing. In accord
ance with this phase of the invention a handle
device is provided which may be locked to the 40
barrel to serve as a means for effecting rotation
of the same. One method for locking the handle
device to the barrel is to provide the former with
means selectively movable into and out of locking
engagement with the barrel. So far as the broad 45
aspect of the invention is concerned any suitable
construction for effecting such movement may be
used. At present I prefer to use a cam for this
purpose, and more particularly, a cam which
serves to move the locking means in only one 50
direction and I provide means such as a spring
for moving the locking means in a reverse direc
tion. In connection with a construction such as
just outlined a handle is preferably provided for
imparting movement to the cam.
When a cam 55
2,131,716
is used for this purpose it may be either of the
sliding or rotating type.
Furthermore, means
may be provided for securing the handle in a
position in which the locking means is disengaged
from the barrel or in a position in which the
locking means is engaged therewith.
With the above in view I have shown the barrel
and forward end of the breech casing as being
provided with cooperating threaded portions 55
The lever I 2 is ?rst swung downward to the posi
tion shown in Fig. 4 to move the piston tube 6
rearward and thereby disconnect the same from
the barrel. The grip 3! is now grasped and
pulled rearward whereupon the lugs 35 are with
drawn from the notches 38 and the spring 39 is
compressed. The handle may now be rotated 90°
in a clockwise direction on its pivot which will
cause the cam portion 2? to project the detent 23
10 and K6, the threads being of the interrupted type
so that the barrel need be turned through only
against the action of spring 2d into the recess 28
15 nect the barrel and breech casing.
notches 3'! in the ears and in this position fur
ther movement of the handle with respect to the
the barrel, the relative position of the parts
approximately 90° and then moved longitudinally in
now corresponding to Fig. 8. If the pull on the
to eiTect its disconnection from the breech casing. grip is released the lugs 36 will engage in the
A reversal of these steps serves to securely con
The barrel is
provided with the shoulder i ‘I which functions to
prevent rotation of the barrel relative to the
breech casing unless the threaded portion of the
barrel is fully inserted into the threaded portion
20 of the casing. A groove E8 in the casing receives
the shoulder I? when the barrel has been prop
erly inserted to permit the necessary relative ro
tation for effecting the connection of the barrel
and casing.
25
When the tube 6 is in its normal forward posi
tion it is connected to the barrel and serves to
prevent relative rotation of the barrel and breech
casing.
_
One form which a handle device embodying the
30 invention may take is generally indicated at it.
Such a handle device comprises a body portion,
means by which the body portion may be locked
to the ?rearm, and a handle.
In the speci?c form illustrated the body portion
35 29 is generally cylindrical and has a bifurcated
projection 26 thereon. Slidably mounted within
a recess 22 in the projection is a projectible de
tent 23 which is preferably biased to a retracted
position by a spring 24. Pivoted between the
40 ears 25, 25 is a handle 26.
Means, such as a cam,
is provided for projecting the detent 23 into look
ing engagement with the barrel and I have shown
the handle as including a cam portion 27 which,
when the handle is moved from the full line posi
45 tion of Fig. 2 to the dotted line position B of Fig.
2 functions to project the detent against the
retracting force of the spring 263. Means are pro
vided so that the detent may lockingly engage the
barrel and in the particular form illustrated a
50 recess 28 is formed in the barrel into which the
detent may project.
In accordance with another phase of the in
vention I construct the handle device so that
movement thereof is selectively permitted or pre
5. vented. While' this could be accomplished in
5 ' other ways I now
prefer the construction shown.
The handle 25 includes a stem portion 29 of re
duced diameter which is threaded at 3B, and a
slidable grip 3! preferably formed from material,
60 such as wood, having a low coei?cient of heat
conductivity. The grip is bored at 32 and coun
terbored at 33 which results in a shoulder 34.
The grip includes a member 35 secured thereto
having lugs 36 thereon which are adapted to
65 engage in notches 3'? and 38 in the ears 25. The
stem 29 projects into the counterbore 33 and has
a spring 39 positioned thereon between the
shoulder 34 and a nut [iii threaded on the portion
363.
70, The operation of the construction so far de
scribed is as follows: Assume that the parts are in
the positions shown in full lines in Fig. 2, that is.
the barrelis secured to the breech casing and
the handle device is in place on the ?rearm with
75~~ the handle extending parallel with the barrel.
body 23 is prevented and the handle device is
locked to the barrel. By pushing the handle up
ward to the position of Fig. '7 the barrel will be
rotated with respect to the breech casing to dis
engage the interrupted threads on these two 20
members and the barrel can then be longitudi
nally removed from the breech casing. A re
versal of these steps will serve to reassemble the
?rearm.
'
Attention is called to the fact that when the 25
handle device is not in use the position of the
handle is such as to not interfere with the oper—
ation of the ?rearm but due to the pivoted con
struction of the handle it has a substantial effec
tive length for leverage when used to rotate the 30
barrel.
A separate handle device may be provided for
each barrel or, if desired, one handle device may
be used with several barrels. In this latter case
it is only necessary, once the barrel has been re 35
moved from the ?rearm, to pull the grip 3! and
thereby withdraw the lugs 36 from the notches 31
and to then rotate the handle to the position
shown in. Fig. 10.
This action rotates the cam
portion 2'1’ to permit the spring 24 to withdraw the
detent 23 from the recess 28 in the barrel. It is
obvious that the handle device can now be slid
rearward on the barrel to remove it therefrom
and that it may then be placed upon another’
barrel by a reversal of this procedure.
The handle device is positioned on the ?re
arm at, or approximately at, the center of grav
ity of the gun. It should be noted that when
the handle extends parallel to the barrel, as
shown in full lines in Fig. 2, it is free to rotate
about the barrel from this position to a position 50
corresponding to that indicated at A in dotted
lines in Fig. 2, and it can then be conveniently
used as a carrying handle for the entire ?rearm
which will be suspended from the handle in a
substantially balanced position.
55
In order to prevent swinging of the ?rearm
with respect to the handle device when it is being
carried thereby various means may be provided
to limit the relative rotation of the two. I have
shown a preferred construction for so limiting 60
this relative rotation. The breech casing has a
projection 4i thereon adapted to project into a
notch 52 in the body portion of the'handle device.
The projection and notch are so related that the
handle device can not rotate in a clockwise di 65
rection beyond the position shown in Fig. 7 and
at A, Fig. 2.
When the barrel and breech casing are pro
vided with cooperating threads it is desirable to
provide means for limiting the relative rotation 70
of the two between a position in which the threads
are completely interengaged to ?rmly secure the
barrel to the breech casing and a position in
which the threads are completely disengaged. 75
2,131,716
Although separate means could be provided for
this purpose, in the construction shown the
3
locked to the barrel and be out of the line of
sight of the ?rearm and a position in which the
handle device in conjunction with the projection
41, performs this limiting function. The posi
barrel is disconnectible from the breech casing
after having been rotated by the handle device
‘tions and widths of the projection 4| and the
handle for carrying the ?rearm in a substantially
notch 42 are so related that when the handle de
vice is locked to the barrel and in the position
shown at B,,Fig. 2, the shoulder 43 strikes the
projection M and when in the position shown in
10 Fig. 5 with the threads l5 and I6 completely dis
engaged the shoulder 44 strikes the projection.
It should be noted that the notch 42 and pro
jection 4! provide the proper limits of relative ro
tation when the handle device serves as a ?rearm
carrying handle and when it serves as a means for
rotating the barrel.
It will be obvious to those skilled in the art
that many changes may be made in the details
of the invention within the scope of the appended
20 claims.
I claim:
1. The combination of a ?rearm having a cas
ing and a readily detachable barrel removable
in the forward direction, and a handle connected
25 directly with the barrel and positioned with the
major portion thereof behind a transverse plane
through the front of the casing so as to be ad
jacent the center of gravity of the ?rearm, the
said handle thus serving either for carrying the
80. barrel only or for carrying the entire ?rearm in
balanced position.
, 2. In combination with a ?rearm including a
rotatable barrel, a handle device rotatably mount
ed on the ?rearm approximately at its center of
35.; gravity whereby the handle device may be moved
from a position out of the line of sight into a posi
tion to serve as a handle for carrying the ?rearm
in a substantially‘ balanced position, and means
for selectively locking the handle device to the
40, barrel for rotating the same.
3. In combination with a ?rearm including a
rotatable, barrel, a handle device mounted on the
?rearm approximately at its center of gravity and
normally rotatable with respect to the ?rearm
whereby the handle device may be moved from a
positionv out of the line of sight into a position
to serve as a handle for carrying the ?rearm in a
substantially balanced position, and means for
selectively locking‘the handle device to the barrel
for rotating the same.
4. The combination of a ?rearm, a handle de
vice rotatably mounted on the ?rearm near its
center of gravity, and cooperating means on the
handle device and ?rearm for limiting the rela
tive movement of the two between a position in
which the handle device may serve as a handle for
carrying the ?rearm in a substantially balanced
position and a position in which the handle device
‘ is out of the line of sight of the ?rearm.
5. The combination of a ?rearm having a
(1i)
breech casing and a barrel mounted thereon which
is connectible thereto and disconnectible there
from by relative rotation of the two; a handle de
vice mounted on the barrel near the center of
gravity of the ?rearm, said handle device includ
ing a body portion rotatably mounted on the
barrel, a handle on said body portion, and means
movableinto engagement with the barrel to lock
the handle device to the barrel whereby the
handle device may be used to rotate the barrel
with respect to the breech casing; and cooperat
ing means on the handle device and breech casing
for limiting relative rotation of the two between
a position in which the handle device may be
or in which the handle device may serve as a
balanced position.
6.‘ The combination of a ?rearm having a
breech casing and a barrel mounted thereon which
is connectible thereto and disconnectible there
from by relative rotation of the two; a handle
device mounted on the barrel approximately at
the center of gravity of the ?rearm, said handle
device including a body portion rotatably mounted
on the barrel, means on the body portion movable 1123
into locking engagement with the barrel to lock
the handle device to the barrel when the handle
device is positioned'out of theline~ of sight of.
the ?rearm whereby the same may be used to
rotate the barrel with respect to the breech 26
casing, and a handle pivotally mounted on the
body portion operable by moving the same from a.
position in which it extends substantially parallel
to the longitudinal axis of the ?rearm to move
said means into locking engagement with the
barrel, said handle device being rotatable with
respect to the ?rearm and barrel when the handle
extends substantially parallel to the longitudinal
axis of the ?rearm whereby it may be moved to a
position to serve as a handle for carrying the 301
?rearm in a substantially balanced position; and
cooperating means on the handle device and
breech casing for limiting relative rotation of the
two between a position in which the handle
device may be locked to the barrel and be out
of the line of sight of the ?rearm and a posi
tion in which the barrel is disconnectible from
the breech casing after having been rotated by
the handle device or in which the handle device
may serve as a handle for carrying the ?rearm in 40
a substantially balanced position.
'7. In combination with a ?rearm breech cas
ing, a barrel mounted on the casing and con
nectible thereto and disconnectible therefrom by
rotative movement of the barrel with respect to 45
the casing, a handle device comprising a body
portion rotatably -mounted on the barrel and
means on the body portion movable into en~
gagement with the barrel for preventing rotation
of the handle device with respect to the barrel 50
whereby the handle device may be used to ro
tate the barrel, and means for limiting the rota
tion of the barrel with respect to the breech cas
ing in the separative direction when the handle
device is non-rotatably engaged with the barrel.
8. In combination with a ?rearm breech cas
ing, a barrel mounted on the casing and connect
ible thereto and disconnectible therefrom by ro
tative movement of the barrel with respect to the
casing, a handle device comprising a body por (30
tion rotatably mounted on the barrel and means
on the body portion movable into engagement
with the barrel for preventing rotation of the
handle device with respect to the barrel whereby
the handle device may be used to rotate the bar
rel, and cooperating means on the breech casing
and handle device for limiting the rotation of
the barrel with respect to the breech casing when
the handle device is non-rotatably engaged with
70
the barrel.
9. In combination with a ?rearm including a
barrel, a handle device comprising a body por
tion rotatably mounted on the barrel, a detent
carried by said body portion and movable to and
from a position of engagement with the barrel
4
2,131,716
v for preventing relative rotation of the handle ‘de
vice and barrel, means for biasing the detent
from said position of engagement, means car
ried by the body portion for holding the detent
in said position of engagement against the ac
tion of said biasing means, and a grip portion
vwhich extends horizontally when the handle de
vice is used to carry the ?rearm in a horizontal
10
position depending from the handle.
10. In combination with a ?rearm including a
barrel, a handle device comprising a body por
tion rotatably mounted on the barrel, detent
means carried by said body portion and pro
J'ectable into engagement with the barrel for
15 preventing rotation of the handle device with
respect to the barrel, and a handle mounted on
the body portion and movable relatively thereto
to project the detent means into engagement with
the barrel, said handle including a grip portion
20 which extends horizontally when the handle de
vice is used to carry the firearm in a horizontal
position depending from the handle.
11. In combination with a ?rearm including a
barrel, a handle device comprising a body portion
25 rotatably mounted on the barrel, detent means
carried by said body portion and projectible into
engagement with the barrel for preventing rota
tion of the handle device with respect to the bar
rel, and a handle mounted on the body and in
30 cluding a cam member movable to operate said
detent means and also including a grip portion
which extends horizontally when the handle de
vice is used to carry the ?rearm in a horizontal
position depending from the handle.
7
35
12. In combination with a ?rearm including a
barrel, a handle device comprising a body por
tion rotatably mounted on the barrel, detent
means carried by said body portion and pro
jectable into engagement with the barrel for pre
venting rotation of the handle device With re
spect to the barrel, a handle mounted on said
body portion and movable relatively thereto to
project the detent means into engagement with
the barrel, said handle including a grip portion
which extends horizontally when the handle de
vice is used to carry the ?rearm in a horizontal
position depending from the handle, and means
operable for selectively preventing or permitting
movement of the handle with respect to the body
portion.
13. In combination with a ?rearm including a
barrel, a handle device comprising a body por
tion rotatably mounted on the barrel, projectible 1O
detent means carried by said body portion and
adapted to be moved into engagement with the
barrel for preventing rotation of the handle de
vice with respect to the barrel, a handle mounted
on the body portion and including a cam member
movable to project said detent means and also
including a grip portion which extends horizon
tally when the handle device is used to carry the
?rearm in a horizontal position depending from
the handle, and means on the handle operable 20
for selectively preventing or permitting move
ment of the handle with respect to the body por
tion.
14. In combination with a ?rearm including
a barrel, a handle device comprising a body por
25
tion rotatably mounted on the barrel, projectible
detent means carried by said body portion and
adapted to be moved into engagement with the
barrel for preventing rotation of the handle de
vice with respect to the barrel, a pivoted handle 30
mounted on the body portion and including a cam
member movable to project said detent means
and also including a grip portion movable with
respect to the rest of the handle into and out of
interlocking engagement with the body portion
for selectively preventing or permitting pivotal
movement of the handle with respect to the body
portion, said grip portion extending horizontally
when the handle device is used to carry the ?re
arm in a horizontal position depending from the 40
handle.
'
MARRINER A. BROWNING.
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