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Патент USA US2108026

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Feb. 8, 1938.
'
'
c. sUTTER ET A1.
lAUTOMATIC
2,108,026 _
FIREARM '
Filed Aug. 13, 1936
7 Sheets-Sheet 1
Feb.. 8, 1938.
2,108,026
c. SUTTER ET Al.
AUTOMATIC FIREARM
‘7 Sheets-Sheet 2
Filed Aug. 13, 1936
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Feb. 8, 1938.
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Patented Feb. 8, 1938
UNITED STATES
PATENT -' oF'FlcE-i "
41,108,026A
AUTOMATIC ‘FIREARM
Charles Sutter, Suresnes, and André Roussel,
, Courbevoie, France, assignors to Société ,An- »
onyme Anciens yEtablissements lHotchkiss
& Cie,l Levallois-Perret, France, a joint-stock
company of France
Applicaumiaugust 13, 193s, serial Nay-'95,880
'
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l
:In GermanyJanuary 25,1936
vni> claims.
To increase the rate- _of ñring'of automatic >fire
`
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(cl. sii-_27) _ '
whether the resilient elements- operate'as a rate
1
I 'arms it is customary to use resilientnelementsliw accelerator or as a scar damper,
which store up the energy possessed, at'the ‘eridf „ According to another embodiment, the movable
of its recoil, by the breech closure 'mechanism'of member comprises one or a plurality of oscillating
the firearm, and restore it to the llatter Yat .the levers fulcrumed -about a ñxed pin and which are
beginning of its return to battery,
' -
y'
' "l
During continuous iiring, devices of this kind
do not increase the strain on the partsof the
iirearm. But when it is desired to cease iìring,
10 the sear hasta stop the breech-closure mecha
nism which is moving at high speed, and- is there
by subjected to considerable strain which' can
cause its breakage or that of other parts;l owing
to this fact, it is advantageous to damp this shock
" 15 on the sear by making the latter resilient.
The invention relates to an arrangement which
enablesthe same member 'to be used as a speed
accelerator and as a damper for the sear.
According to the invention, the mechanism of
the firearm is subjected to the action of accelerat
20 ing members consisting of» resilient elements
(springs, Belleville washers, rubber, etc.) which
serve at the same time as damping members for
the sear when the firing is stopped.
For this purpose, the sear is carried by a mov
able member which can be displaced in the direc
tion towards which, when the firing is stopped,
the sear is urged against the action of the above
mentioned resilient elements, which constantly7
30 tend to hold the said- movable member and the
sear intheir normal position..
ï
The resilient elements are interposed between a
part on which the breech-closure mechanism acts
at the end of the recoil, and a part which follows
35 the displacements'of the movable member carry
ing the sear, each of said parts being adapted to
form an abutment for the resilient “elements when ‘
they are compressed by the other part.
According to a modification, the resilient ele
40' ments constantly bear against the same ñxed
abutment and are compressed in the. same direc
tion by the mechanism oí the firearm and by the
‘-
movable member carrying the sear.
o
According to an embodiment, the movable mem
ber comprises a sliding member carrying a pin on
which the sear pivots.
.
Said sliding member “carries a heel which forms
one of the bearing parts of the resilient elements.
pivotally connected to the sear. so that -for any
forward'displacement of the latter there corre
sponds‘an oscillating vvmovement of said lever or
levers, which movement takes place against the
action of the resilient elements.
10
The sear spring is placed between the sear and
a ñxed member, and a knuckle guide or a sliding
guide is interposed between said spring and said
member.
~
„
_
»
'
‘
‘
According to a modiiication, said spring is inter 15
posed between the sear and the‘movable member
which carries it.
«
f
.
Other characteristics-and peculiarities of the
invention will become apparent from the ensuing
description taken in conjunction with the accom 20
panying drawings which show _diagrammatically l
and merely by Way of example various embodi
ments of the invention.
In said drawings:
'
-
' `
- Figs. 1 and 2 are sectional elevations oi' a first
embodiment of the invention, Fig. 2 being a sec
tional view along the line II-II of Fig. l.
s
I
Fig. Sis a sectional elevation and, Figs.- 4, 5 and
6 are plan views of another modification'showing _
the members in the three diiïerent positions which soA
they can take up.
Figs. '7, 8, 9, and 10 are sectional elevations of
Sour other modiiications.
l
In the embodiment of Figs. 1 and 2, the rate
accelerator of the iirearm, comprises a~ member I
subjected to the action of resilient elements 2
which can be of any kind (springs, rubber, Belle
ville washers, etc.'). When the breech 3 reaches
the end of its recoil, it strikes said member l and
compresses the resilient elements 2~which thus 40
store up a certain amount of energy, which they
subsequently restore to the breech 3 at the begin
ning of its following forward travel, thereby caus
' ing an increase of the firing rate.
According to the invention., said resilient ele
ments 2 not> only operate for increasing the ñring
‘45
_ rate, but also play the part of a sear damper. For
-this purpose, the sear 4 is mounted on a pin 5
carried by a sliding member 6 mounted so as to
be subjected to the action of the resilient ele
ments 2. For this purpose, -said member 6 is
provided with a heel 1, and it is on said heel that
which strikes iixed abutments when said sliding the said elements 2 bear. 'I'he assembly formed
member moves, the latter moving in one direction by said elements 2, the buffer l and the heel '|,4
or
the other, from. a mean position, according to , is lodged in, a fixed casing 8 which includes an 55
55
According toa modification, the sliding member
itself contains the resilient elements which are in
that case placed between two members either of
..
2
2,108,026 v
abutment 9 against which can bear the collar
I0 of the accelerator I. The member 8 abuts at
the rear, at the left of Fig. 1, against a ñxed part
I6 of the firearm. The initial compression of
the elements 271s obtained by means of a nut H,
which screws on the threaded end of the rod l2
secured to the accelerator l.
In the usual manner, the scar d is actuated
by a trigger 26 and has a nose i3 on. which hooks
10 the nose I 4 of the piston I5 of the ñrearm, when
the tiring ceases.
.
The operation takes place under the ioliornng
conditions:
As long as the ñring goes on, the elements 2
operate exclusively to increase the firing rate,
bearing, for this purpose, against the heel ‘l that is
to say against the sliding member Ei which itself
bears against the fixed part
of the iìrear
When, for ceasing fire, the scar is released,
posed between the sear @i and the sliding member
6, that is to say between two members which
move simultaneously.
In the modification of Fig. ’7, the mechanism
of the ñrearm acts on the member l through the
instrumentality of a lever ‘it rocking about a
ñxed pin 2! and pivotally mounted at 22 on. the
said member l.
The sliding member d acts on the same mem
ber through the instrumentality of lts heel ‘ì.
It will be noted that, in this case, the mechanism
of the iirearm and the sliding member compress
the resilient element 2 always in the same direc
10
tion. said element bearing against the threaded
plug ll.
Fig, 8 shows another embodiment in which the
sliding member is replaced by a lever t 'Iol
crumed about a iixed pin 23. The pin 5 oi' the
scar d is carried byone of the arms of said lever,
20 the piston l5, at the beginning of its forward
other arm of which is in contact with a sleeve 20
movement, hooks onto thenose I3 and tends to 'i against
which the resilient element 2 acts. Said
carry the sear 4 and consequently the member 6 lever t plays exactly the same part as the sliding
forwards. The elements 2 damp this movement, member t of the preceding figures, that is to
bearing for this purpose against the collar l0
that when the firing ceases, the forward move
which itself bears against the abutment 9. By 'say
ment of the scar is damped owing to the fact
_ means of said damping, the strains to which the
that said lever b compresses the resilient ele
parts o1' the firearm are subjected when the firing ment i’.
stops are considerably diminished.
In the embodiment oi‘ Fig. 9, the pin of the
The sear spring l? is, according to the inven
30 tion, mounted on a knuckle guide i8 so that it sear is also carried by one of the arms or" a lever
6, the other arm of which is engaged, vrlth a 30
can tum freely when the dammd forward move
clearance J, in a slot of the member i integral.
ment of the sear taires place.
with
the member l. Said clearance _permits the
.es shown in
2, two accelerators i with a
single slidingmember t5, can be advantageously
‘y
35 provided.
The invention can, moreover, be carried out
with a great number of modiilcations and it is
only by> way of example that some other modiñ
cations of same will be described.
40
’
In the example of Figs. 3 to 6, the member 6 is
integral with the casing t which, in this case,
is therefore movable. Said casing has two bores
in_each of which Vis arranged an accelerator
damper assembly formed by the resilient elements
45 2, by a ñrst head l playing the part of an acceler
ator and by a second head 7, playing the part of
the heel 'l of Fig. l. A threaded plug it enables
the initial compression oi? the elements ‘2 to be
effected. ~The united assembly comprising the
casing 8 and member ti is provided with a nose
I9 which is struck by a part iii belonging to the
moving mechanism of the iîrearm at the end
of its recoil.
The operation takes place under the following
55 conditions;
Normally the damping members are in the po
sitlon shown in Fig. 4. When at the end of the
recoil, the part l5 strikes the nose i9 the assem
bly 8_6 is displaced towards the left and comes
60 into the position of Fig. 5 thereby compressing
the elements 2 against the head l. The energy
stored up by said elements is restored to the
mechanism of the firearm during the following
stroke as previously described. During the ñring
65 the members are thus displaced at each shot be
tween the position of Fig. 4 and that of Eg. 5.
When the ñring ceases the nose id of the part
I5 (which can be the piston of the firearm) hooks
onto the nose i3 of the sear ä which then tends
to be carried towards the right (position of Fig. 6)
at the same time as the assembly 3_6.
This
movement is damped by the elements 2 which,
in this case, bear against the head l which itself
bears with its end l0 against the iixed abutment 9.
75
In this embodiment, a Sear spring il is inter
free operation of said member as an accelerator
during the iìring.
When the firing ceases the
upper arm of the lever ë tends to move towards
the left compressing the elements 2 which there
by ensure the damping of the forward move
ment of the sear.
The lever 5 has a third arm 25 on which acts
,the' sear spring il’ yand which also serves as an
abutment for the lever ii.
The em'
preceding
rent of Fig. l0 differs from the
by the arrangement oi' the lever ii,
which in this case acts on the resilient elements i?
in the opposite direction to the member i'.
has already been explained all these em
ì'iodiu’lentsV have only been described and illus
trateol in a purely explanatory and in no way
limitative manner and they can be subjected to
any useful modiñcations without exceeding the 50
scope of the present invention.
We claim:
.
. 1. Automatic ñrearm comprising a mechanism
having a reciprocating movement, a longitudi
nally sliding member, a sear for stopping the ñr
lng pivotally mounted on said member, a heel
carried by said member and against which the
breech mechanism abuts at the end of its recoil
stroke, housings provided in said member and, in
each of said housings, resilient means interposed 60
between an accelerator member mounted at one
end of said housing and adapted to be carried
rearwardly by said sliding member to compress
the resilient means at the end of the stroke of
the recoil mechanism of the firearm and a mov
able heel mounted at the other end of said hous
ing and adapted to be carried forwards by said
sliding member when the ñi'ing is stopped, a ñxed
abutment being provided against which said
movable heel abuts when the accelerator comn
presses said resilient means.
2. Automatic firearm comprising a mechanism '
‘having a reciprocating movement, a firing rate
accelerator member adapted to be carried rear
Wards by the breech mechanism at the end of 75
3
2,108,026
its recoil travel, a membeì' displaceable relatively
to the breech mechanism, a sear mounted on
said displaceable member and displaceable on
the one hand substantially longitudinally and
on the other hand transversely for controlling
the tiring, a trigger for controlling the trans
verse movement of the sear, and a set oi resilient
elements co-operating with said accelerator
member which compresses said elements in its
'rearward movement and with said displaceable
member which also compresses said set of re
silient elements when the sear is carried for
wards by the breech mechanism.
3. Automatic ilrearm comprising a mechanism
having a reciprocating movement, a firing rate
accelerator member adapted to be'carried rear
wards by the breech mechanism at the end of its
recoil travel,V -a member slidable longitudinally
relatively to the breech mechanism, a sear piv
20 oted on said `slidable member, a trigger for rock
ing' the sear, and a set of resilient elementsv co
operating with said accelerator member, which
having a reciprocating movement, a, ñring rate
accelerator member adapted to be carried rear'
wards by the breech mechanism at >the end of
its recoil travel, a member displaceable rela
tively to the breech mechanism, a sear'mounted
on said displaceable member and displaceable
on the one hand substantially longitudinally and
on the other hand transversely for controlling
the tiring, a trigger for controlling the trans
verse movement of the sear, a set of resilient ele
ments cooperating with said accelerator member
which compresses said resilient elements in'its
rearward movement and with said displaceable
member which likewise compresses said set of
resilient elements when the sear is carried for
wards by the breech mechanism, and a sear
spring interposed betwêe'n an 'arm of the sear
and a part moving in synchronism with the sear.
8. Automatic firearm comprising a mechanism
having a reciprocating movement, a iiring rate 20
accelerator member adapted to be carried rear
wards by the breech mechanism at the end of
compresses said elements in vits rearward move- A its recoil travel, a pivoting member mounted on
a fixed pivot and a sear having a trunnion ec
ment, and with said slidable member which like
Wise compresses said set of resilient elements centric relatively to said iixed pivot pivotally
when it is longitudinally forwardly displaced by _mounted on said trunnion, whereby said sear is
the sear.
.
4. Automatic firearm comprising a mechanism
having a. reciprocating movement, a ñring rate
accelerator >member adapted to be carried rear
wards by the breech mechanism at the end of
its recoil travel, a member displaceable relatively
to the breech mechanism, a scar pivotally mount
30
I ed on said displaceable member, a trigger for
rocking the sear, resilient means interposed be
tween said accelerator member and a part mov
ing in synchronism with the displaceable mem
ber, and abutments on which the resilient ele'40
ments bear in both directions.
5. Automatic ilrearm comprising
_ having a reciprocating movement,
accelerator member adapted to be
wards by the breech mechanism at
a mechanism
a firing rate
carried rear
the end o! its
¿recoil travel, a member slidable longitudinally
relatively to the breech mechanism, a heel car
ried by said slidable member, ya sear for con
trolling the firing pivotally mounted on said slid
' able member, a trigger for rocking the sear, and
resilient means interposed between said heel and
Si) ` said accelerator member.
6. Automatic firearm comprising a mechanism
having a reciprocating movement, a firing rate
‘ accelerator member adapted to te carried rear
wards by the breech mechanism at the end of
its recoil travel, a member displaceable relatively
to the breech mechanism, a sear mounted _on said
.displaceable member and displaceable on the -one
hand substantially longitudinally and on the
other hand transversely for controlling the fir
C0 ing, a trigger for controlling the transverse
movement of the sear, a set of resilient elements
_co-operating with said displaceable member
which compresses said elements in its rearward
movement-and with said displaceable member
which likewise compresses said set of resilient
elements when the sear is carried forward by
the breech mechanism, and a scar spring inter
displaceable on the one hand substantially lon
gitudinally and on the other hand transversely
for controlling the firing, a trigger for control
ling the transverse movement of the sear, a set 30
oi' resilient elements co-operating with said ac
celerator member which compresses said elements
in its rearward movement and with said pivoting
member which likewise compresses said set of
resilient elements when it is rocked by the sear.
9. Automatic iirearm comprising a mechanism
having a reciprocating movement, a firing rate
` accelerating member adapted to be carried rear
wards by the breech mechanism at the end
of its recoil travel, a lever pivoting on a fixed
fulcrum and having a trunnion eccentric rela
tively to said fulcrum, a scar pivotally mounted
on said trunnion, whereby said sear is displaceable
on the one hand substantially longitudinally and
on the other hand transversely for controlling the .45
firing, a trigger for controlling the transverse`
movement of the sear, resilient means interposed
between said accelerator member and said leverv
and adapted to be compressed by each of these
4two members, and iixed abutments for limiting 50
the movements of said two members.
10. Automatic iirearm comprising a mecha
nism having a reciprocating movement, a ñrst
lever pivoting onìa fixed fulcrum and displaced
by the breech mechanism at the end of its recoil 55
travel, a second lever pivoting on a iixed fulcrum ‘
and having a trunnion eccentric relatively to said
fulcrum, a sear pivotally mounted on said trun
nion, whereby said sear is displaceable on the
one hand longitudinally and on the other hand 80
transversely for controlling the ñring, a trigger
for controlling the transverse movement of the
sear, resilient means interposed between the two
free ends of said two levers and adapted to`be
compressed by said levers, and iixed abutments
limiting the pivoting movement of said two le
vers.
posed between an arm oi' the Sear and a swivel
pressed against a iixed part of the iirearm.
7. Automatic firearm comprising a mechanism
CHARLES SUTI'ER.
ANDRE BOUSSEL.
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