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Патент USA US2406089

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mg. 26, 1946!
J. A. E. MARTINEAU
ROTARY BARREL GUN
Filed April 8, .1944
2 Sheets-Sheet 1
2, 14.
J. A. E. MARTINEAU
2,406,089
ROTARY BARREL GUN'
Filed April 8, 1944
2 Sheets-Sheet 2
‘
?
Patented Aug. 20, ‘1946
2,406,089
UNITED STATES PATENT OFFICE
2,406,089
‘ROTARY BARREL’ ‘GUN
Joseph Albert-Euciide Martineau, Penticton,
British Columbia, Canada
Application April 8, 1944, Serial No. 530,100
,7
In Canada April 24, 1943
9 Claims.
(C1: 89—1)
1
2
The present invention pertains to a novel gun
and has for its object, the provision of a gun that
The-‘casing ! is extended at 6 and similarly the
barrel 2 is extended at l. The extension 1 is
preferably formed with ribs or ?ns 8 engaging the
extension‘ 6. The extension ‘I prolongs‘the path
of the bullet and thus trues its course.
The outer end of barrel 2 is knurled at 9 (Fig
spins the bullet without ri?ing in the bore.
One of the objections to riding is the ‘cost of
the ‘mechanical work involved. Also, the ri?ing
wears down in time by friction with the bullet.
The function, on the other hand, retards the
bullet.
These objections are avoided, in the construc
tion herein described, ‘by a means for rotating
the gun barrel. The rotation is accomplished by
means of a turbine rotor attached to ‘the barrel
and driven by the gas liberated on explosion of
the cartridge. The turbine is built and assembled
compactly around the magazine.
Another characteristic of the invention is that
successive shots increase the angular velocity of
the barrel and hence of the spinning. No such
cumulative eiiect results from the usual helicoidal
rifling groove.
The invention is fully disclosed by way of eX
ample in the following description and in the ac
companying drawings in which:
Figure l is a partial longitudinal section of the
barrel;
'
Figures 2 and 3 are sections on the lines 2--2
and '3—3 of Figure 1;
.
‘7 Figure'll is an end View of the barrel;
ure '7) to receive a rotor disk ll) (Figure 11)
which has its inner circumference knurled at H.
At opposite sides of the rotor arev stator plates I2
and i3, the former being mounted on the barrel
2 and the latter having‘a rearward breech exten
sion if?! providing a ?ring chamber. The plate
53 is threaded at i5 on its periphery for thread
ing into a ring l6 surrounding the rotor Iii and
15 holding the plate l2, as shown in Figure 5. The
stator further includes a ring I‘! enclosing the
rotor E0.
The plates l2 and it are grooved eccentrically
., at i8 ‘near the center. The rotor ID has four
20 radial slots it (Figure 11) in which are received
slidable blades 20 (Figure 10). One end of each
blade has outwardly extending ?ns 2| received in
the cam slots I 8 respectively. The ring [1 is
grooved interiorly at 22 (Figure 8) opposite the
protruding part of the cam grooves I8 to permit
the corresponding outward movement of the
blades 20 while the rotor is actuated in a'manner
presently to be described.
‘
Figure 5 is a longitudinal section on line 5—-5
From the bore of the breech extension ‘M ex
of Figure 8 of another portion of the barrel and 03 Q tends a radial port 23 (Figure 13) on which is
gun;
seated a valve 24. A chamber 25 formed in the
Figure 6 is a section on the line 6—‘~6 of Fig
stator disk [3 communicates with the interior of
ure 5;
the ?ring chamber when the valveis opened. The
Figure 7 is an elevation of one of the rotating
motive fluid for actuating the rotor is the gas
, liberated by the explosion of a cartridge 26 in the
blocks;
Figure 8 is a cross ‘section of the ‘gun on line
?ring chamber. A port 21 in the disk I 3 connects
8—8 of Figure 5;
the chamber 25 with the spaces between the
Figures 9, 10 and 11 are respectively end view
blades 20 of the rotor it at one end of the
of the barrel, perspective View of one of the
groove 22.
blades, and an elevation of the rotor disk;
40 ‘The cam grooves l8 hold the blades 20 against
Figure 12 is a side elevation of the gun;
the inner edge of the ring ll, except at the intake
' Figure 13 is a section on the line I3—I3 of Fig
and ‘exhaust, as shown in Figure 8. Thus, the
ure 5, and
pressure gas admitted through port 27 turns the
- Figure 14 is a detail section of the valve on line
rotor clockwise. Communicating with the other
I4—l4 of Figure 13.
. 45 end of the groove 22 is an exhaust port 28 formed
Reference to these views will now be made by
in- the plate 13 and registering with a port 29 in
use of like characters which are employed to des
a tube 39 accommodating the turbine vand other
ignate corresponding parts throughout.
parts. It will be noted that the intake port 27
In Figure 1 is shown, the casing l of the gun,
has an angular branch 3| which directs the pres
in which is rotatably mounted the barrel 2 in 50 sure ?uid in a tangential path into the turbine
bearing 3. Several such bearings may be pro
for greater efficiency.
vided, as shown in Figures 1 and 5. The bearings
The gas from the exploded cartridge is also
are ?nned at 4 (Figure 3) for radiation. Like
permitted to escape through a port 32 (Figure 5)
wise the casing I is slotted lengthwise at 5 for
in the stator plate 13, to which is attached a tube
cooling.
55 33. This tube forms part of a device for expelling
2,406,089
3
4
the empty shell and loading a fresh cartridge
barrel, said extension providing a ?ring chamber,
into the breech extension, actuated by pressure
a pair of stator disks in said casing, a rotor be
through the port 32. This mechanism is not de
tween said disks and secured to said barrel, radial
scribed in detail inasmuch as it forms the sub
blades slidably mounted in said rotor, means in
stance of another application. When only one 5 said disks for sliding said blades, and a connec
cartridge is to be ?red, the port 32 is obstructed
tion for ?uid from said chamber to the space be
by manually setting a cranked screw 34.
tween said disks for actuating said rotor.
In the enlargement 30 and forward of the disk
4. In a gun, a casing, a barrel rotatably mount
I2 is a block 35 (Figures 5 and '7) having for
ed therein, a rearward breech extension for the
wardly extending ?ns 36 for radiation. The block 10 barrel, said extension providing a ?ring chamber,
is surrounded by a split spring ring 3‘! to prevent
a pair of stator disks in said casing, a rotor be
leakage of gas from the turbine. The casing I is
tween said disks and secured to said barrel, radial
provided with a handle 38 (Figure 12) by which
blades slidably mounted in said rotor, said disks
the gun may be held and steadied. The enlarge
having eccentric grooves facing each other, ?ns
ment 3 is enclosed in a tube .39 held by a set 15 extending from said blades into said grooves, and
screw 40. A pin 4| extending from the enlarge
a connection for ?uid from said chamber to the
ment 30 into a slot v£12 in the tube 39 completes
space between said disks for actuating said rotor.
the enclosure.
'
5. In a gun, a casing, a barrel rotatably mount
The admission of gas from the chamber M to
ed therein, a rearward breech extension for the
the rotor and the operation of the latter have 20 barrel, said extension providing a ?ring chamber,
already been described. The valve 24 on the in
a rotor ?xed to said barrel, means forcommuni
take port 23 is normally held closed by a rocker
eating gas from said chamber to said rotor to
arm 43 (Figure 14) under the in?uence of a spring
actuate the latter, a block adjacent to said rotor,
‘44. The explosion pressure opens the valve
and cooling ?ns extending from said block.
against the spring, and the valve closes immedi- 25
6. In a gun, a casing, a barrel rotatably mount
ately afterward.
.
ed therein, a rearward breech extension for the
The rotor it], being splined on the barrel 2,
barrel, said extension providing a ?ring chamber,
turns the barrel in its bearings 3. The bullet head
‘a pair of stator disks in said casing, a rotor be
45 travelling through the barrel 2 is thus rotated
tween said disks and secured to said barrel, a con
without the use of ri?ing or helicoidal grooves in 30 nection for fluid from said chamber to the space
the barrel.’ After the ?rst shot, the rotational
between said disks for actuating said rotor, a block
speed of the barrel increases with each succeeding
adjacent to one of said disks, and cooling ?ns
shot, thus creating a cumulative e?ect which is
extending from-said block.
7
not possible with ordinary ri?ing. In the opera
'7. In a gun, a casing, a barrel rotatably mount
tion the slidable blades 20 are operated by ?ns 35 ed therein, a rearward breech extension for the
2| received in cam groove l8. rI'he expanding
barrel, said extension providing a ?ring chamber,
gases admitted through port 21 turns the rotor
a rotor ?xed to said barrel, a pair of stator disks
clockwise. When needed, the loading mechanism
in said casing, a rotor between said disks and
(not shown) may be made towork at various,
secured to said barrel, one of said disks having
speeds or not at all by screwing up the cranked 40 a chamber and an inlet connecting said chamber
screw 34 which obstructs more or less port 32.
to said» rotor, said disk having an exhaust port
The invention also eliminates the usual draw
connected to said rotor.
backs of helicoidal grooves, such as their cost,
8. In a gun, a casing, a barrel rotatably mount-~~
wear by friction with the bullet head, and retar
ed. therein, a rearward breech extension for the
dation of the bullet head because of such friction. 45 barrel, said extension providing a ?ring chamber,
Although a speci?c embodiment of the inven;
a rotor ?xed'to said barrel, a pair of stator disks
tion has been illustrated and described, it will be
in said casing, a rotor between said disks and se
understood that various alterations in thedetails
cured to saidibarrel, radial blades slidably mount
of construction may be made without departing
ed in said rotor, means in said disks ‘for sliding
vfrom the scope of the invention as indicated by 50 said blades, one of said disks having a chamber
the appended claims.
and an inlet connecting said chamber to said
What I claim as my invention is:
: ~
1
.
rotor, said disk-having an exhaust port connected
1. In a gun, a casing, a barrel rotatably mount
.
to said rotor.
‘
'
ed therein, a rearward breech extension for the
9. In a gun, a casing, a barrel rotatably mount
barrel, said extension providing a ?ring chamber, 55 ed therein, a rearward breech extension for the
a rotor ?xed to said barrel, and means for com
barrel, said extension providing a ?ring chamber,
municating gas from said chamber-to said rotor
a pair of stator disks in said casing, a rotor be
to actuate the latter.
a
tween said disks and secured to said barrel, radial
2,. In a gun, a casing, a barrel rotatably mount
blades slidably mounted. in said rotor, means in
ed therein, a rearward breech extension for the 60 said disks for sliding said blades, one of said disks
barrel, said extension providing a ?ring chamber,
having a chamberand an inlet connecting said
a pair of stator disks in said casing, a rotor‘be
chamber to. said rotor, said’disk having an ex
tween said disks and secured. to said barrel, and
haust port connected to said rotor, a block adja--v
a connection for ?uidv from said chamber to the
cent to one of said disks, and cooling ?ns extend
space between said disks for actuating said rotor, 65 ing from said blocks.
'
3. In a gun, a casing, a barrel rotatably mount:
ed therein, a rearward breech extension for the
JOSEPH ALBERT EUCLIDE MARTINEAU.
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