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Патент USA US2411877

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Dec. 3, 1946,
2,413,877
E. J. HEIZER
GUN CHARGER
Filed June l5, _1944
Mw
2,411,877;
Ív’atented ÍDec. 3, 1945
Ui‘ëi'l'ED STATES PATENT OFI-'HCE
2,411,877
GUN CHARGER
Edward 5». Heizer, West Caldwell, N. J., assign
or to Specialties Development Corporation,
Bloomfield, N. J., a corporation of New Jersey
Application June 15, 1944, Serial No. 540,368
9 Claims. (o1. 89-1)
l
2
tubular casing or housing I I providing a cylinder
I2 at one end portion and a guideway I4 at the
more particularly to a gun charger for recharg
other end portion, and a piston assembly I5
ing and recocking machine guns, automatic can
mounted in the cylinder I2 and adapted to be
nons and the like.
An object of the present invention is to pro 5 guided by 'the guideway I4 when in extended or
operated position as shown in Figure 2. The
vide a gun charger which is light in weight and
guideway is provided with a pair of diametrically compact in construction.
opposed longitudinally extending slots IIB, one
Another object is to provide a gun charger con
of which is adapted to receive the stud or bolt
structed oi a minimum number of parts likely to
i() B of the charging mechanism of the gun, as
get out of repair.
shown in Figure 3 in broken lines.
Another object is to provide a gun charger
The piston assembly comprises a suitable pis
which is simple in design and may be taken apart
ton I‘I, a tubular sleeve I8 having one end there
and put together again without the requirement
of secured to the piston, and a ram member I9
of a high degree of mechanical skill.
'Another object is to provide a gun charger l5 Secured to the other end of the sleeve and mov
able in the guideway for engaging the stud or
which is rugged in construction and can with
bolt B and effecting recharging and recocking of
stand any rough usage to which it may be sub
The present ~invention relates to guns, and
jected.
A further object consists in the combination
the charging mechanism of the gun. A main
spring ZIJ for returning the piston assembly to its
and arrangement of parts whereby the foregoing 20 retracted or inactive position (Figure 1) has one
end portion thereof telescoped into the sleeve I8
objects may be accomplished.
and the end of this portion engages a shock ab
Other and further objects of the invention will
sorbing element 2| mounted adjacent the pis
be obvious upon an understanding of‘the illus
ton I'I. The other end of the'spring 20 abuts
trative embodiment about to be described, or will
be indicated in the appended claims, and vari 25 a collar 22 supported by a cap 24 secured to the
end of the casing I I.
ous advantages not referred to herein will occur
The end of the casing II where the piston as
to one skilled in the art upon employment of the
sembly normally is disposed has a valve device
invention in practice.
25 secured thereto for controlling the admission
A preferred embodiment of the invention has .
been chosen for purposes of illustration and de 30 and exhaust of a fluid pressure medium, such as
compressed air or the like, adapted to operate
scription and is shown in the accompanying draw
the piston assembly. The pressure medium may
ing, forming a part of the speciñcation, wherein:
be supplied from any suitable source and its flow
Figure 1 is a fragmentary longitudinal sectional
to and from the valve device may be controlled
view of a. gun charger while in inactive position,
35 by a valve 26 of any suitable design for alter
illustrating an embodiment of the invention.
nately connecting the valve device to the source
Figure 2 is a view similar` to Figure 1 with the
of pressure medium at 2'I and to the atmosphere
gun charger in operated position.
at 28. The valve 26 may be actuated manually
Figure 3 is a sectional view taken substantially
or by mechanical means such as an electrical,
along the line 3_3 of Figure 2, illustrating a de
40 pneumatic or hydraulic device which may be op
tail of the gun charger.
erated manually or automatically either locally
Referring to the drawing, there is shown a gun
or remotely.
charger Ill adapted to be attached to a machine
The valve device comp-rises a body provided
gun, automatic cannon and the like for recharg
with a passage 3i! in communication with the
ing and recocking the charging mechanism of
the gun or cannon. For example, the gun charger 45 valve 26 by means of a conduit 3| and extending
to a valve chamber 32 formed with a valve seat
in accordance with the present invention is par
34 on which is seated a valve member 35 of the
ticularly adapted to be used in connection with
differential pressure type.
machine guns oi the “Browning” type, wherein a
A passage 36 extends from the chamber 32 to
stud or bolt carried by the charging mechanism
extends through a slot to the exterior of the gun 50 a second valve chamber 3l which houses a check
type valve arrangement. The chamber 31 is pro
and the stud is adapted to be engaged by oper
vided with a seat 39 at its inleI‘l for receiving a
ating parts of the gun charger. A machine gun
ball valve member 40 and a second seat 4I at its
of this type is illustrated in United States Patent
outlet for receiving a second ball valve member
No. 2,180,751.
.
The gun charger le cemprises a substantially 55 42. A cylindrical helical spring 44 interposed be
2,411,877
4
tween the ball valve members ¿i9 and 42 serves to
urge the same toward their respective seats. An
shown in Figure 2. Near the end of its outward
stroke, the shock absorbing element 2l carried
inlet passage #i5 connects the outlet of the cham
the passage 4G, however, is smaller than the ef
by the piston il engages the collar 58 secured to
the rod 50 and carries the rod towards the left, in
opposition to the spring 57, a sufficient distance
to move the end 5| oi the rod out of the valve
chamber 31, whereby the ball valve member 42 is
moved into engagement with its seat by the in
fluence of the spring 44 and the pressure medium
in the valve chamber 31. The ball valve member
fective area of the end of the valve member 35"
now acts as a check valve, and serves to retain
opposite the end engaging the seat 34, whereby
pressure medium in the cylinder I2.
When the piston assembly is extended as `iust
ber 3'! with the cylinder l2 for admitting the
pressure medium in back of the piston il to effect
operation of the piston assembly.
An enlarged exhaust passage 45 extends from
the end of the cylinder l2 to the valve chamber
92 by Way oi the seat 34. The effective area of
the valve member 35 is maintained seated to close
the exhaust passage 46 while the pressure medi
described, the ram member l 9 engages the bolt or
um is introduced into or is maintained in the 15 stud B (Figure 3) and moves it towards the left
cylinder l2.
In accordance with the invention, means asso
to recocli and recharge the charging mechanism
of the gun.
In order to permit the gun charger to assume
ciated with the piston assembly are provided for
controlling the check valve arrangement, where
its initial or normally inactive position (Figure 1),
by the admission of pressure medium into the 20 the valve 26 is actuated to place the valve de
cylinder is terminated when the piston assembly "
is operated into a predetermined extended posi
tion.
As illustrated herein such means comprise an
elongated rod 5i?, extending lengthwise with re
spect to the cylinder l2 and the guideway i4,
vice 25 in communication with the atmosphere.
The pressure medium in the valve chamber 32 is
then relieved by way of the passage 39 and the
conduit 3l, whereupon the exhaust port valve
member 35 is rapidly unseated and the pressure
medium is exhausted to the atmosphere by a rel
which has an end 5l of reduced diameter extend
atively large port 69 extending from the chamber
ing through passage 45 for unseating the ball
32.
valve member 42. Adjacent the end 5l the rod
As the piston assembly is returned by the main
extends through a packing 52 carried by the pis 30 spring 25 the collar 58 carried by the rod 50 is
ton i'l serving as a support for this end of the
released and the spring 5l moves the rod into a
rod, and the other end of the rod is slidably sup
position to unseat the ball valve member 42.
ported by a bushing 53 formed with the cap 24.
The passage of pressure medium from the valve
The extent of slidable movement ofthe rod
chamber 37 to the'valve cham-ber 32 is prevented
and the distance it extends into the valve cham 35 by the ball valve member 40 engaging its seat 39.l
ber 3? may be adjusted by a stop collar '54 thread
In practice the foregoing described operation
ed to the rod and slidably disposed in a recess 55
may take place inV a fraction of a second thus
adjacent the bushing and adapted to abut a
enabling the gun charger to put a gun back into
shoulder 5E serving as stop means.
operation in a minimum interval` of time.
The rod normally is urged into a position to 40
An advantage of the valve arrangement for
unseat the ball valve member 42, as shown in
shutting off the pressure medium when- the pis
Figure l by means of a spring 57 under compres
ton assembly is at or near the end of its out
sion and telescoped about the rod and within the
ward stroke, is that only suiiicient pressure me
main spring 29. The spring 5I has one end there
dium, or a slight excess to overcome the pres
of engaging a collar 5B secured to the rod at
sure ci the spring 2i! is admitted into the cylinder
about its midpoint, and has its other end engag
l2. Upon movement of ythe‘piston assembly to
ing a face or shoulder 59 adjacent the bushing
its outwardly extended position, the inlet 45 is
5S. The- collar 58 is slidably disposed in a sleeve
closed, thereby preventing further pressure me
5| telescoped between the springs 29 and 57, and
dium from being admitted, which would merely
having its outer end secured to the cap 24 in any
build up unnecessary pressure in the cylinder
i2. In this marmer, a considerable- saving in
pressure medium is eiiected.
If desired, the ram member I9 may be utilized
for holding the bolt of thel gun while it is not
intended to be fired, whereby the gun is condi
tioned for- iiring. This may be accomplished
without using a considerable amount of pres
sure medium, because the stop collar 54 is so
adjusted that the rod 5E! is moved to facilitate
seating of the ball valve member 42 to` prevent
suitable manner.
In operation, as shown in Figure 1, the valve 29
normally establishes communication between the
valve device 25 and the atmosphere. The main
spring 29 is eii‘ective to maintain the piston as
sembly l5 in retracted or inactive position, and
the spring 57 urges the rod 59 towards the right
as far as the stop collar 54 and shoulder 59 will
permit, whereby the end 5l of the rod unseats
the ball valve member 42, while the spring 44 re
tains the ball valve member 49 on its seat 39.
In order to put the gun charger in operation,
the valve 2B is actuated to place the valve device
entry of pressure medium into the cylinder I2 at
or near the end of the outward stroke of the ram
member. The gas trapped in the' cylinder serves
in communication with the source of pressure
to maintain the ram member in its outward ex
medium, as shown in Figure 2. The pressure me 65 tending position Without the- use of additional
dium now enters the passage 39 and flows into
pressure medium.
the valve chamber 32 and causes the valve mem
From the foregoing description, it will be seen
ber 35 to engage its seat 34 to close the exhaust
that the present invention provides an improved
port. rï’he pressure medium then flows through
gun charger which is extremely simple and com
the passage 35,'unseats the ball valve member 49 70 pact in design, and is rapid and efficient in'> oper
and enters the cylinder by way of the valve
ation.
As various changes may b-e made in the form.
chamber 3'? and the inlet passage 45.
l
construction and arrangement of the parts here
without departing from the spirit and scope
the left into extended or operating position, as 75 of the invention and without sacriiicing any of
The pressure medium entering the cylinder is
eiîective to drive the piston assembly I5 towards
2,411,877
its advantages, it is to be understood that all>
for said ram, a spring for moving said piston
matter herein is to‘be interpreted as illustrative
assembly in the opposite direction,»a member
and not in any limiting sense.
extending lengthwise with respect to said guide- .
way and said cylinder having one end positioned
for engaging said check valve, a spring for nor
mally urging said memberto unseat said check
valve, means 0n said member engageable by said
piston assembly upon movement thereof in the
It :is also to >be understood that the followingy
claims are intended to cover all the generic and
speciñc features of the invention herein de
scribed, and all statements of the scope of the
invention which, as a matter of language, might
first mentioned direction to move said member
be said to fall therebetween.
10 into a position to permit said check valve to
I claim:
1. In a gun charger, the combination of a
seat, and means associated with said member and
said guideway for adjusting the extent of un
cylinder, means for admitting a pressure medi
seating of said check valve by said member.
um >into said cylinder including a valve, a pis
ton assembly in said cylinder including a ram
5. In a gun charger, the combination of a cyl
for retracting the bolt of a gun, said assembly 15 inder, means for admitting a pressure medium
being operable in o-ne direction by pressure me
into said cylinder including a check valve, a piston
assembly in said cylinder including a ram for re
dium introduced into said cylinder, a guideway
for said ram, a spring for moving said piston
tracting the bolt of a gun, Said assembly being op
erable in one direction by pressure medium in
assembly in the opposite direction, a member
extending lengthwise with respect to said guide 20 troduced into said cylinder, a guideway for said
ram, a spring for moving said piston assembly
way and said cylinder having one end positioned
in the opposite direction, a rod extending length
for operating said valve, a spring for normally
wise with respect to said guideway and said cyl
causing said member to open said valve, and
inder having one end positioned for engaging said
means on said member engageable by said pis
ton assembly upon movement thereof in_the first 25 check valve, a second spring telescoped about said
rod for normally urging said rod to unseat said
mentioned direction to move said member into
check Valve, collar means on said rod engageable
a position to effect closing of said valve.
by said piston assembly upon movement thereof
2. In a gun charger, the combination of a
in the ñrst mentioned direction to move said rod
cylinder, means for admitting a pressure medium
into said cylinder including a check valve, a pis 30 into a position to permit said check valve to seat,
and a sleeve having one end secured to Said guide
ton assembly in said cylinder including a ram
way adjacent its outward end and being in tele
for retracting the boit of a gun, said. assembly
scoping relation with said second spring and serv
being operable in one direction by pressure me
ing as guide means for said collar means and
dium introduced into said cylinder, a guideway
for said ram, a spring for moving said piston 35 said spring.
6. In a gun charger, the combination of a cyl
assembly in the opposite direction, a rod extend
inder, means for admitting a pressure medium
ing lengthwise with respect to said guideway and
into said cylinder including a check valve, a pis
said cylinder having one end positioned for en
ton assembly in said cylinder including a ram
gaging said check valve and having its other end
mounted for sliding movement with respect to 40 for retracting the bolt of a gun, said assembly
being operable in one direction by pressure me
said guideway, a spring for normally urging said
dium introduced into said cylinder, a guideway for
rod to unseat said checl: valve, and means on
said ram, having a bushing at one end thereof pro
said rod engageable by said piston assemb‘y upon
vided With abutment means and stop means, a
movement thereof in the first mentioned direc
tion to move said rod into a position to permit 45 spring for moving said piston assembly in the op
posite direction, a rod extending lengthwise with
said check valve to seat.
3. In a gun charger, the combination of a
cylinder, means for admitting a pressure med-Zum
respect to said guideway and said cylinder having
into said cylinder including a check valve, a pis
and having its other end slidably mounted in said
one end positioned for engaging said check valve
ton assembly in said cylinder including a ram 50 bushing, a collar on said rod engageable by said
piston assembly upon movement thereof in the
for retracting the bolt of a gun, said assembly
first mentioned direction to move said rod into
being operable in one direction by pressure me
a position to permit said check valve to seat,
a second spring having one end engaging said
collar and having said other end engaging said
its outward end, a spring for moving said piston
abutment means for normally urging said rod to
assembly in the opposite direction, an elongated
unseat said check valve, and a collar adjustably
member extending lengthwise with respect to
connected to said rod for engaging said stop
said guideway and said cylinder having one end
means to determine the extent of unseating of
positioned for engaging said check valve, abut
ment means on said member engageable by said 60 said check valve by said rod.
7. In a gun charger, the combination of a cyl
piston assembly upon movement thereof in the
dium introduced into said cylinder, a guideway
for said ram having abutment means adjacent
ñrst mentioned direction to move said member
into a position to permit said check Valve to
seat, and a spring having one end engaging said
abutment means of said guideway and having its
other end engaging said abutment means of said
member for normally urging said member to
unseat said check valve.
4. In a gun charger, the combination of a
cylinder, means for admitting a pressure medium
into said cylinder including a check valve, a pis
ton assembly in said cylinder including a ram
for retracting the bolt of a gun, said assembly
being operable in one direction by pressure me
inder, means for admitting a pressure medium
into said cylinder including a check valve, a pis
ton assembly in said cylinder including a ram
for retracting the bolt of a gun, said assembly
being operable in one direction by pressure me
dium introduced into said cylinder, a guideway
for said ram having a bushing at one end thereof
provided with abutment means and stop means,
a spring for moving said piston assembly in the
opposite direction, a rod extending lengthwise
with respect to said guideway and said cylinder
having one end positioned for engaging said check
valve and having its other end slidably mounted in
dium introduced into said cylinder, a guideway 75 said bushing, a collar on said rod engageable by
7`
piston assemblyv upon movement~ thereof in they
ñrst mentioned direction to a predetermined posi.
the ñrst mentioned. direction to move said’> rod
tion to move said rod into a position to permit saidY
into. a position to> permit said check valve to seat,y
a second spring having onev end engaging said
check valve to seat, a second spring having one
end engaging said collar and having said other
collar and having said other end engaging said
end engaging said abutment means for normally»
abutment means for normally urging said rod to
unseat. said’ check valve, a collar adiustably con
urging said rod to unseat said check valve, a col~
lar adjustably connected to said rod for engaging
nected to said rad> for engagingsaid` stop means
said stop means to determinel the extent of un
to determine the extent of unseating of said check
valve» byl said ro'd, and a sleeve. secured to said 10 seating of said check valve by said rod, and a
bushingA and being in telescoping relation with
sleeve secured to said bushing andvbeing in tele
scoping relation with said second spring and said
said second spring and said rod and serving as
guide meansfor said second spring-and said collar.
rod' and serving as guide means for said second
spring and said collar, said first spring being
8. In a gun' charger, thel combination> of a- cyl
inder, means for admitting a pressure» medium 15 telescoped about said sleeve.
9. In a gun charger, the combination of a cyl
into said cylinder including a- check valve, spring
saidl piston assembly upon. movement thereofv in
means for seating said check valve; a piston- as
sembly. in said cylinder including a- ramA for' re
inder, means for admitting a pressure medium
into said cylinder including a valve, a piston as
sembly in said cylinder operable in one direction
tracting the bolt of a gun, saidl assemblyk beingA
operable in one direction by pressuremedium in 20 by pressure medium introduced into said cylin
der to move said piston assembly into a prede
troduced- into said cylinder, a guideway for said.
ram, having a> bushing at one end thereof pro
termined position, resilient means for moving said
piston assembly in an opposite direction, valve
vided With abutment means and stop means, a
spring for moving said piston assemblyv in the
actuating means associated With said piston as
oppositel direction, said spring» having one endY 25 sembly and said valve and being engageable by
positioned at the outward endy of. said guideway
said piston assembly prior to completion of its
and having its other end engaging said piston as
movement in the ñrst mentioned direction, to per
sembly, a rod extending lengthwise with respect`
mit closing of said valve, andresilient means con
to said guideway- and said cylinder> having~ one
nected with said valve actuating means for nor
end positioned for. engaging said checkv valve and 30 mally causing said valve actuating means to
having its,- other end slidably mountedy in said»
maintain said valve in an open position.
bushing, a collar on said rodV engageable» by said>
EDWARD J. HEIZER.
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