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K R FW L E R
AMMUNITION E'OR RECOILLESS WEAPONS
‘ Filed Dec. 12,. 1946
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Patented Dec. 27, 1949
2,492,279
UNITED STATES PATENT OFFECE
2,492,279
AMMUNITION FOR RECOILLESS WEAPONS
Kenneth E. Fowler, Warren, Pa.
Application December 12, 1946, Serial No. 715,675
1
1 Claim. (Cl. 102-38)
My invention relates to improvements in am
munition for recoilless weapons, particularly ?xed
‘ammunition ?red electrically in such- weapons.
In recoilless weapons of the type to be dis
cussed, a proportion of the propellent gases is
permitted to escape rearwardly of the weapon
.
2
1
action of the breech mechanism, the breechblock
3 closes the chamber 2 preparatory to ?ring of the
weapon.
'
To eliminate recoil in the weapon, the breech
block 3 is provided with a plurality of inclined,
tapered ori?ces 6 through which a proportion of
to eliminate recoil of the same. Leakage of such
the propellent gases are discharged from the car
gases not only diminishes the resultant eifect of
tridge case. The degree of inclination, the direc
these gases but also causes corrosion of the ?n
tion and the size of these ori?ces 6 are such that
ished surfaces of parts resulting in improper 10 the reaction of the propellent gases passing
functioning of the same.
through them will counteract the forces actingv
The principal object of my invention is to
upon the weapon, such as the rotational forces
provide an insulating seal between the cartridge
created by the reaction between the rifling in the
case walls and the electrical conducting means
barrel and the moving projectile, and the longi
passing through the walls for ?ring the car
tudinal forces, caused by the reaction of the pro
tridge, said seal also being capable of withstand—
jectile when it is ejected from the cartridge case.
ing the heat and pressure generated by the pro
Further explanation of the operation of the
pellent gases.
recoilless weapon may be had by reference to my
The present invention can be used with recoil
application Serial No. 715,674, ?led December
less weapons of the character disclosed in my 20 12, 1947, entitled “Recoilless weapons.”
application Serial No. 715,674, entitled “Recoil
The round of ammunition 5’ consists of the
less Weapons,” ?led December 12, 1947, in which
is claimed the structure disclosed in this appli
cartridge casing 1 rigidly‘secured, as by crimp
ing, about the projectile 8 of any desired form and
cation but not claimed herein.
contains a propelling charge 8' adapted to be
My invention will be more fully understood by i) ignited by a primer, not shown, which is ?red
reference to the accompanying drawings in
electrically in a manner to be described.
which:
The rear end ID of the cartridge case 1 is closed
Figure 1 is a longitudinal vertical section
by a frangible cap 9 of cardboard, molded com
through the chamber, the breechblock and ad
position or other suitable material which, when
jacent parts of a recoilless weapon, showing in 30 the round is fired, is blown out by the propellent
elevation, a round of ammunition with its end
gases and disintegrated, permitting a portion of
broken away to show the construction thereof;
the propellent gases to escape rearwardly of the
Figure 2 is a vertical section through the
projectile and through the ori?ces 6 as hereto
breechblock at line 2—2 of Figure 1 showing the
fore explained. The cap 9 is anchored in place
ori?ces at the rear of the weapon through which 35 by the inturned flange [2’ and sealed by wax 9'
the propellent gases escape for counteracting the
or other suitable substance.
’
recoil of the weapon;
Forwardly of the rear end lb of the’ cartridge
Figure 3 is an enlarged partial sectional view
case ‘I, an annular rim ll extends about and is
taken through lines 3-3 of Figure 1;
rigidly secured to the cartridge case 1 by brazing
Figure 4 is an enlarged partial sectional view 40 or other similar means. The portion of the car
showing the spring-pressed plunger in engage
tridge case 1, between its rear end Ill and rim
ment with the contact ring of the round of am
II and indicated by reference numeral I2, is free
munition preparatory to ?ring the same.
to be expanded radially by the gases escaping to
Figure 1 discloses generally a recoilless weapon
having a ri?ed barrel I, a chamber 2, a breech 45 the rear, for a purpose to be described.
The rim H is provided with an annular groove
block 3, a locking sleeve 4 and a spring-pressed
l3 containing a. micarta layer 14, or other suit
plunger device for electrically ?ring the round of
able insulating material. An annular metallic
?xed ammunition. The weapon is single load
contact ring I5 is secured in the layer M and
ing and has the necessary mechanism, not shown,
for aiming it.
50 sunk below the radial surfaces of the ring H,
clearly shown in Figure 3. The ring I 5 is adapt
A breech mechanism, not shown, rotates the
locking sleeve 4 to unlock and move the breech
ed to be engaged by a spring-pressed pin l6 of the
block 3 away from the chamber 2 whereby a ?red
device 5, at all angular positions of the cartridge
round of ammunition 5' can be removed from and
case 1, the pin l6 being connected to an outside
a new one inserted into the chamber. By reverse 55 electrical source. The rim II and a wall of the
2,492,279
I case 1 against the breechblock 3 to seal off any
cartridge case ‘I are provided with aligned radial
leakage of the propellent gases between the abut
ting faces 28 and 29 of the breechblock 3 and the
gun chamber 2‘, respectively, and through the de
vice 5, thus protecting these parts from damage.
openings [1 and I8, respectively.
A hollow cylindrical plug l9 extends through
these openings and is securely fastened to the
inside of the cartridge case by brazing l9’ or
other suitable means.
The piston 2|, will also be forced by the gases
The plug [9 has a cylin
against the seat 25' in the recess 20 and be de—
drical recess 20 within which a cylindrical piston .
formed, thereby preventing leakage of said gases
through the joint between the cartridge case and
of the recess 20 by a 'micarta lining 2.2 or similar 10 the electrical wiring.
Through the use of the expanding portion I2
material. The plug 19 is also provided at one end
and the gas-tight seal for the electrical wiring, I
with an aperture and at the other end with a v
completely and effectively utilize the propellent
tapered recess 20'.
gases both to propel the projectile and to coun
7 A short insulated electrical lead 23, having one
teract recoil of the weapon, losing none of the
of its ends bared and packed with lead foil
gases prior to extraction of its energy through
against the metallic ring l5 to form a good elec
undesirable leakage.
trical contact therewith passes through the open
It will be obvious to those skilled in the art that
ing 24 and has its other end bared and imbedded
2|, formed of copper or other suitable deformable
material, is inserted and insulated from the walls
g
various ‘modi?cations may be made in the con
in the copper piston 2|. Another insulated elec
trical lead '24’ having one of its endsrbared and 20 struction described herein without departing
from the spirit and scope of my inventionl V ‘ ‘
imbedded in the copperpiston 2.1, is connected to
.a primer, not shown.
An insulated lead '25 from
I claim:
'
the primer is grounded to the cartridge case at
26 to complete the electrical circuit. The copper
piston 2| with its insulating lining 212 has a drive
.In an electrically ?red round of ?xed ammuni
tion having a casing and a rearwardly disposed
‘?t within the recess 20. The space between the
walls of the ?ared recess 20' and the electrical
.lead 24’ is sealed with wax 2?! or similar plastic
substance to exclude moisture from entering the
the chamber and breech block of a gun into
which the round is loaded, means for conducting
current from an insulated conductor on said gun
to the interior of said round to ?re same, said
30 means serving also to cbturate explosive gases,
said last means comprising an annular conduct
cartridge case.
r
annular ?ange thereon adapted to seat between
.
During operation of the weapon, the breech
block 3 is opened, a round of ammunition hav
ing the improvement just described is rammed
into the gun chamber 2 and the breechblock 3 is
then closed and locked'preparatory to ?ring.
The gun chamber 2 does not house the com
plete length of the cartridge case 1 but only that .
forward portion u-‘p'to and including the annular
rim H, leaving the remaining portion-(1,2 rear
-
'
To ?re the round of ammunition, electric cur
rent from any suitable outside source is carried .
by the ‘spring-pressed pin 15 to the annular con
tact metallic ring 15,, and then through the lead
23, the copper piston 24 and the lead '24’ to the
primer, not shown, returning through the
grounded lead .25..
'
deformable cylindrical plug ' of relatively soft
metal in said passage constructed and arranged
to be forced against a portion of said passage by
wardly of the rim 1 I to be engaged by the breech
block 3.
ing ring set into said annular ?ange but insulated
therefrom, a passage through ‘said ?ange and
casing from said ring "to the interior of :said cas
ing, and insulated conducting means in said pas
sage leading from said ring to said interior, said
conducting means including an enlargedjparti-allly
explosive gases to prevent leakage of such ,ggases
through said passage the portion of the-passage
against which the plug is forced under pressure
being a conically tapered reduced shoulder in
said passage.
REFERENCES oi'rnn
~
Upon ?ring the round of ammunition, the pro
pellent gases will shoot the project-?ed torwardly I
through the gun barrel in the usual manner and
at the same time force out the cap v9 disintegrat
ing the same, thereby allow-ing a portion of the
>
KENNETH R. FOWLER.
'
'
The following references arenof record in the
?le of this patent:
UNITED STATES PATENTS
.Number
520,116
Name
'
Date
Mason .__...__'.. _____ _ .May 22, 18.94
ori?ces B to counteract the recoil of theweapon -=
1,084,7é5
Lindsay _________ __ Jan. 20., 19.14
as already explained. Simultaneously with this
action, the propellent gases will ‘alsoexpand radi
ally the cylindrical portion 12 of the cartridge
1,108,717
Davis ._________-__.___ Aug. 25., 1914
1,263,763
Hasting __________ __ Apr. 23., ‘11918
propellent gases to escape rearwardly through the.
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