close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2116139

код для вставки
May 3, 1938.
M. A. BROWNING
2,116,139
FIRING MECHANISM FOR AUTOMATIC FIREARMS
Original Filed April 10. 1934
2 Sheets-SheetÍ l
l
w
„
.ww
-H. -.lI
,mw
, nä."
ÈMÉ»É5,2m
wvmw», mmÈ
May 3, 1938..
M. A. BROWNING
2,116,139
FIRING MECHANISM FOR AUTOMATIC EIREARMS
Original Filed April 10, 1934
2 Sheets-Sheet 2
v
Jhr/anta?"
@Y ’JM
i
ÃÉ Z: DFHEV
2,116,139
Patented May 3, 193s
`UNITE
STATES PAT E N T OFFICE
2,116,139
FIRING MECHANISM FOR AUTOMATIC
.FIREARMS
Marriner A. Browning, Ogden, Utah, assig'nor to
J. M. & M. S. Browning Company, Ogden,
Utah, a corporation vof Utah
originni application April 1o, 1934, serial No.
719,862. Divided and this application March
19, 1935,l Serial No.'11,791
15 Claims.
One object of the invention is to provide an
improved Yhammer mechanism which is con
trolleö. directly by the main operating slide so
as to insure the closing of the breech before fir
,5 ing occurs.
>-Another object of the invention is to provide
an improved retarding mechanism whereby the
gun may becaused to operate at a slower speed
than it otherwise would.
.10 , vThis present application constitutes a division
of myecopending application for Automatic íire
arm,> Serial No. 719,862, filed April 10, 1934, which
said co-pending application was issued as Patent
No. 2,093,704on September 21, 1937.
15
'
In‘the accompanying drawings I have shown
the embodiment of the inventionwhich I now
deem preferable, but -it will be understood that
the drawings are intended for illustrative pur
poses only and are not to be relied upon as limit
,._20 ingor defining the scope of the invention, the
claims forming a part of this speciñcation being
relied upon for that purpose.
Of the drawings:
Fig. y1 is a side view Vof a firearm embodying
Ul the invention.
-Fig„2 is an enlarged fragmentary view of the
rear portion of the firearm, this View being partly
:a side view and partly a longitudinal sectional
view.
y30
Fig. 3 is a View similar to Fig. 2 but showing
y¿the parts in different relative positions.
Fig. >‘i is a transverse sectional uiew taken
'along the line-ll--ß of Fig. 3.
.
Fig. 5 is afragmentary view similar to a rear
_35 portion of'Figs. 2 and 3, and showing the retard
ying mechanism in an intermediate position.
,
Fig. 6,is a View similar-'to Fig. 5, but showing
of steelalthough I do not necessarily limit my
self to this integral construction. The portion
Ia of the casing is formed to receive the rear
end of 4a barrel 2. Behind'the portion Ia are
two main side walls Ib, Ib Aconnected near the 5
center by an integral cross _member >I“, An
opening Id is. provided at the front'of the cross
member lc, which opening is normally closed by
a-.pivoted Vcover V3 heldby a releasable latch 3a.
An opening is _providednat the rear of the cross 10
member, .whichopening is closed by a plate 4.
Thebottomiof the casing is normallyclosed by
separate plates `5 and-6. The rear of the casing
is normally closed by a plate `'l flanged at its
sidesand having ribs (not shown) adapted to en- 15
ter grooves formedin the side walls lb, Ib. A
suitable. latch `lbserves to normally’hold the end
plate 1.in place. Carried by the -plate 1 at op
posite sides .thereofare two brackets 8, 8 carry
ing handles 9, 9.
20
The casingfl is provided .withan integral eX
tension le -which extends forward underneath
the» barrel. .This extension is hollow and it serves
to engage and retain -a piston vtube i6. At its
forward> end lthe tube IBis- connected with, and 25
supported ßby, the barrel. Longitudinally mov
able along-thebottom ofthe main casing is an
operating slide 21, this~s1ide being connected
with -fa _piston 29 and a piston rod.28 positioned
within'theïpistontube I6. A cylinder ,3| is pro- 30
»vided in the forwardfendY of the. tube vI6, and the
piston raccurately ñts. the said cylinder. A gas
v,passage extends fromthe vbore of the barrel‘to
the'cylindento enable-the gaseseof explosion to
Fenter the cylinder and .aci-„upon the piston to 35
Yforce it'rearward.
Y
For-ireturning-the slidefin theforward direc
tion afterfhavingvbeen moved rearward by the
Ypiston and piston rod, there is provided an action
~.ing position.
,.40 Y "Fig, 7 is a View similar to Fig. 5, but showing -springz§32 supported upon'and guidedby a rod 40
:the retarding mechanism reset by a cam on the -33. Preferably the spring and rod 32 and 33
extendintoa hollowV buii'er 34 carried by the rear
«operating slide.
Fig. 8 is an enlarged fragmentary view-.taken vplate `1. Thespring at its rear end abuts. against
-'a head,35 detachably secured inplace in the buii
»alongthe line-S-Boi Fig. 6.
Atl’iefretarding mechanismin its hammer releas
- 45
Fig. 9 is a cross sectional View taken on the line
oli-9 of FigV 8.
Fig.- l0 isv an enlarged fragmentary longitudinal
.sectional view taken along the line IIJ-l0 of
IiFig..8.
»Fig-11 is a view similar to Fig. 10 but showing
.thcparts in diiierent relative positions.
Referring to the drawings, l represents Vas an
entirety the main breech casing which is gen
erally rectangular in section as shown in'lî‘ig- 4.
.55 ¿Asshown the casing is formed from a single piece
>er. The spring at-its forward endv extends into 45
an Yaperture in the slide 21 and abutsagainst a
shoulder v.3b. A hole äßßprovides clearance for
the rodl 33 when the slide is in its rear position.
The slide 2'! serves. to operate the feeding, load
ing andñring mechanisms of the gun.
50
Extending transversely through the casing be
low the rear portionv ofy the barrel is a cartridge
feed rchannel 31 adapted for the-reception of a
Acartridge belt such as A. Transversely movable
`below the feed ychannel 31 is a feed slide39, 55
2
2,116,139
which is actuated by means of the operating slide
21. As shown, the main portion of the feed slide
is below the operating slide, and in this case the
operating slide has a cam groove in its lower face
into which projects a pin carried by the feed
slide. The shape of the groove is such that the
feed slide is reciprocated transversely as the
operating slide reciprocates longitudinally. The
feed slide carries a pawl which engages the car
10 tridge belt to bring a new cartridge into a posi
tion below the barrel at each actuation of 'the
operating slide.
Preferably the operating slide 21 and the parts
associated therewith are removable from the ñre
Toeffect such removal
it is necessary first to remove the spring 32 and
the rod 33 and to then remove the end plate 1
15 arm at the rear thereof.
with the parts carried thereby. The slide is
then substantially free to be withdrawn in the
20 rearward direction, except for the fact that the
pin on the feed slide must be disengaged from
the groove in the operating slide.
'I‘he firearm is provided with a reciprocating
breech bolt 45 which is guided between the side
25 walls Ib, Ib of the casing. The breech bolt is
operated and controlled by mechanism operated
by the slide 21, this mechanism being similar to
provided with a pivot pin 55 which fits a trans
verse pivot opening in the breech bolt, the ex
tractor thus moving bodily rearward and forward
as the breech bolt moves.
The extractor 54 is 20
provided with a transversely extending tooth 56
which is so shaped and positioned as to enter the
groove in the cartridge when the breech bolt and
the extractor are in their forward positions as
shown in Fig. 2.
25
A suitable cam mechanism is provided for con.
trolling and guiding the relative movements of
the extractor, but as this cam mechanism con
stitutes no part of the present invention and is
with the breech bolt at 49 and the link 41 is
pivotally connected with >the slide at 50. When
sufficient to say that when the breech bolt moves
rearward the extractor moves rearward and up
tially in alignment in the relative positions shown.
A lug 41a on the link 41 engages the link 46 to
prevent downward movement beyond the position
40 shown.
fully disclosed in my said application No. 719,862, 30
itis not necessary to include a detailed descrip
tion of it in this present specification. It is
ward, causing the cartridge to be extracted and 35
then lifted into alignment with the chamber in
the barrel. As the breech bolt returns in the
forward direction, the cartridge is inserted into
the chamber and the extractor is again moved
downward into position to engage another car 40
When the slide 21 moves forward under the in
ñuence of the action spring 32 the two links 46
and 41 and the breech bolt 45 move in unison with
it until the breech bolt nearly reaches its forward
tridge in the feed channel.
position, the link 46 being then approximately in
register with the opening Id in the top wall of
cooperation with the ejector to eject the empty '4.5
shell from the ejection opening 16 in the right
the casing. At or about the time that the link
comes into register with the opening the curved
portion 46h of the link 46 engages two cams 5I
projecting inward from the respective side walls
lb, lb of the casing. In the drawings only the
cam on the left hand side is clearly shown, but it
will be understood that there is av similar cam
on the right hand side. These cams 5I cooperate
55
A firearm incorporating the present invention is
intended to be used with cartridges having annu
lar grooves in the heads thereof, and the front
end of the breech bolt is provided with vertical
ribs 52, 53 which cooperate to form a vertical
vgroove for receiving and retaining the heads of
the cartridges. When the breech bolt is in its
forward position asshown in Fig. 2 the head of 10
the cartridge which is in central position in the
feed channel 31 is vertically below the groove in
the front of the breech bolt. For withdrawing
the cartridge from the feed channel and lifting it
into proper relationship to the breech bolt there
is provided an extractor 54. This extractor is
Browning.- As shown in Fig..3 the breech bolt 45
is connected with the slide 21 by means of two
links 46 and 41 pivotally connected with each
other at 48. The link 46 is pivotally connected
Fig. 3, the two links 41 and 48 are held substan
50
as a unit.
that disclosed in Patent No. 1,293,022 to John M.
35 the slide 21 is in its rear position as shown in
45
larly removable, all of these parts being removable
with the curved portion 46b of the link 46 to
force the link upward into the opening Id, the
rear end portion of the link abutting against the
rear wall of the opening as clearly shown in Fig. 2.
In the meantime the slide 21 has continued its
60 forward movement, thus bringing the link 41 into
a substantially upright position. With the parts
in the position shown and described, the breech
bolt is firmly locked in its forward or breeched
position and is well adapted to resist the recoil
65 action incident to firing. Following ñring the
slide 21 is moved rearward by the action of the
gases of explosion in the manner already de
scribed, the link 41 serving first to draw the link
46 downward out of locking position and then to
70 move the link 46 and also the bolt 45 rearward to
the positions shown in Fig. 3.
Reference has already been made to the fact
`
A second extractor 69 is provided for extracting
the empty shell- from the chamber as the breech
bolt moves rearward.
This extractor serves in
wall of the casing.
Mounted in a hole in the breech bolt 45 is a
firing pin 18 capable of limited longitudinal
movement and having an enlarged head 18a at the
rear. The firing pin is provided with a lug 19
which projects upward through a suitable slot in
the breech bolt and when the parts are in their
rearward positions, as shown in Fig. 3, the lug
19 projects into an opening 8U in the link 46.` 55
The forward edge of the opening 88 is curved and
serves as a cam surface to engage the lug 19
and thus move the firing pin 18 relatively rear
ward during rearward movement of the breech
bolt. The lug 19 serves to positively prevent the 60
firing pin from coming into engagement with
the cartridge except when the breech bolt is in its
forward position, as shown in Fig. 2.
For actuating the firing pin 18 there is pro
vided a hammer 8l pivoted at 82 in a recess in the 65
top plate 4. Fig. 3 shows the hammer in cocked
position, it being so held by a sear 83 pivoted to
the plate 4 at 84 and engaging a shoulder Sia ex
tending transversely of the hammer. The sear 83
is biased toward its engaged position by a spring 70
pressed plunger 85. The hammer is biased
toward its firing position by means of a link 86
that the slide 21 can be removed through the rear
pivoted to the hammer at 81.
of the casing.
ported and guided at the rear by a lug 88 through
which it extends. A spring 89 surrounds the link 75
It will be understood that the
75 breech bolt 45 and the links 46 and 41 are simi
The link is sup
2,116,189
and-abuts against the lug `88. The forward end
of the spring abuts against a shoulder on the link.
vlThe-hammer is cocked by engagement with the
slide 21 vand -its associated parts as they move
rearward from the'po-sition shown in Fig. 2 to
the position shownin Fig. 3. To facilitate cock
ing the slide 21 is provided with two upward pro
jecting lugs 93, 90 Vwhich initially engage the
hammer to start the cocking movement thereof.
Subsequently the hammer is engaged by the up
ward extension 46a on the link 46 which serves
to~1nove it to its fully cocked position, as shown
in Fig. 3.
vIn order that the hammer, when released, may
actuate the firing pin there is provided an inter
mediate striker 9| carried by the link 41. This
`striker is in the form of a rod slidably mounted
in a >hole in the link and having longitudinal
movement therein, such movement being limited
by a pin 92 extending transversely of the link and
extending through a notch in the rod or striker.
vThe relationship
the breech bolt
strikerV 97| is in
125 rear end portion
of the parts is such that when
is in its forward position the
engagement with the enlarged
'I8a of the firing pin 18. When
the hammer is released in the manner to be pres
ently described it moves from the position shown
in Fig. 3 to the position shown in Fig. 2, engaging
the striker and driving it forward to actuate the
`firing pin and to thus cause the cartridge to be
fired.
The lower right hand portion of the sear 83 is
cut away'to provide a notch for a Sear operating
lever 93 as shown in Fig. 9. This lever is clearly
shown in Fig. 2, but a part of it is omitted from
-Fig?, in order that the sear itself may be more
clearly shown. The operating lever 93 is pref
'erably pivoted coaxially with the hammer 8| and
'the forward end thereof is in engagement with
.the downward facing top wall of the before
mentioned notch in the Sear. The tail portion
93a of the lever is adapted to engage the top
wall of the casing, as shown in Fig. 3, so as to
limit movement in the clockwise direction. For
actuating the lever93 and for thus in turn actu
fating the sear 83 there is provided an upward
`projection 94 at the rear of the slide 21 and at
the right `hand side thereof, as. shown in Figs. 2,
3, 5 and 6. When the parts reach their forward
250 positions as shown in Figs. 2, 5 and 6, the exten
sion 94 on the slide 21 is forced underneath the
forward portion of the lever 93, thus forcing the
said> forward portion upward and moving the sear
83 in the’ counter-clockwise direction so as to
'release the hammer.
For Áholding the slide 21 in its rear position as
shown in Fig. 3 there is provided a second sear
‘95 pivoted to the bottom plate 5. This Sear is
3
99 is so formed that it can vbe removedonly when
in register with the enlarged rear end of the slot.
When the trigger 91 is pressed forward the sear
95 is disengaged from the slide'21 and the slide
moves forward, causing the links 46 and '41 and
the breech bolt 45 to assume the positions shown
in Fig. 2. When these positions are reached the
projection 94 on the slide 21 releases the hammer
8| in the manner already described, thus actuat
ing the firing pin and causing firing. Thereupon
the vgases of explosion enter the cylinder 3| and
drive the piston 29 rearward, thus moving the
slide .21 rearward and causing the various parts
of the gun to assume the relative positions shown
in Fig. 3. During this rearward movement a new 15
cartridge is extracted from the belt and the shell
of the exploded cartridge is ejected in the manner
already described. If, in the meantime, the trig
ger 91 has been released and permitted to resume
its normal position, the slide is caught and held y20
by the Sear 95 and no further firing takes place.
If, however, the trigger 91 is held in its forward
ñring position the parts immediately again move
forward to the ñring position shown in Fig. 2
and firing again occurs. Thus volley firing may f25
be continued so long as the trigger 91 is held and
so long as the supply of cartridges in the belt is
not exhausted.
In addition to the parts already described the
gun may also be provided with a means for re
tarding the ratefof hre. This means may be
included or omitted as desired.
As shown, particularly in Figs. 8, 10 and 11,
there is provided an auxiliary sear |02 mounted
coaxially with the sear 33 and biased toward its
engaged position by a spring |03. The sear |02
is positioned at >the left side of the gun and is
adapted to engage the same shoulder 8|a in the
hammer that is engaged by the sear 83. For
disengaging the Sear |02 from the shoulder 8|SL
there is provided a slide or sear release |04 at
the left side of the gun, this slide being guided
in part by the pivot pin at 82 and in part by a
pin y|05 projecting inward from the left side of
the recess in the top plate 4. When the slide |04
is in its rearward position as shown in Fig. 11 the
sear |02 engages the shoulder 3|a and prevents
Vmovement of the hammer even though the sear
83 be released in the manner heretofore de
scribed. If the slide |04 be moved forward to
theposition shown inFig. 10 an extension |04ab
on the slide engages the sear to disengage it and
thus release the hammer.
>»":ëecured to the top plate A4 is a bracket |06,
shown in Figs. 2, 3, 5, 6 and 7, this bracket being
U-shaped and carrying two pivot pins |06a and
a -tail portion which projects forward through
|01. Mounted on the pivot pin |06a is a ratchet
wheel |08 and an escapement wheel |09, these
two wheels being connected together for move
ment in unison. Mounted on the pivot p-in |01
is an escapement weightl I0 having teeth thereon
which engage the teeth-on the wheel |09. The
an opening in the plate and is adapted to engage
the sear 95. A spring pressed plunger 98 tends
to hold the trigger in its rearward inoperative
teeth on the escapement weight are so related to
the teeth on the wheel that the weight is forced
-to oscillate as the wh-eel is turned. Thus thel565
position.
weight offers resistance to the turning of the
wheel.
spring pressed upward and engages a notch 96
‘in the bottom of the slide. Carried by the rear
jplate 1 is a manually operable trigger 91 having
’ ` In initially loading the gun in order to start
-flring itis ordinarily necessary to operate the
mechanism of
v-70 draw the ñrst
fer it into the
purpose there
the gun by hand in order to with
cartridge from the belt and trans
position shown in Fig. 3. For this
is provided a handle S9 extending
Pivotally mounted at | I I is a lever I |-2 which is
biased for movement in the counter-clockwise di
rection by means of a lspring I I3. Pivotally con
nected at i I4 to the lever I I2 is a ratchet arm I I5
having teeth thereon adaptedto engage with the
teeth of the ratchet wheel IIGS. A spring | I6
serves to bias the arm I i5 in the clockwise direc
through a slot |30 in the right side wall of the
‘Ícasing and fitting a hole |0| in the slide 21. The
i175 »3 slot |00 is enlarged at its-rear end and the handle tion, thus tending to hold it in engagement withïß75
4
2,116,139
the wheel. The lever II 2 is positioned at the
left side of the casing and is adapted to be en
gaged and reset by a cam surface II'I on the
slide 2l. Thus when the slide moves rearward
the lever H2 is moved or reset in the clockwise
direction to the position shown in Figs. 2 and ’1.
In so moving the teeth on the arm H5 may snap
over the teeth on the wheel |08 without causing
the wheel to rotate.
It will be seen that the lever H2 after having
been moved by the cam I I'I to the position shown
in Fig. '7, tends to move in the counter-clockwise
direction, but it can so move only by causing cor
responding rotation of the ratchet wheel I 08.
15 The ratchet wheel is restrained from rapid move
ment by reason of its connection with the escape
ment wheel I E39. Thus the lever H2 is permitted
to move in the counter-clockwise direction, but
only at a relatively slow rate determined by the
20 action of the escapement weight H0.
The lever H2 is provided with a forward eX
tension I I2gv which is adapted to engage the rear
edge of the slide H34. Thus as the lever moves
relatively slowly in the counter-clockwise direc
25 tion, the extension H2a engages the slide IM so
that the slide is moved forward to release the sear
IllZ.
Fig. 11 shows the extension H2a just com
ing into engagement with the slide, the slide, how
ever, not yet having been moved.
30
From the foregoing description it will be ap
parent that when the main operating slide 21
moves rearward to the position shown in Figs. 3
and 7, the lever H2 is moved in the clockwise
direction, to the position shown in the same ñg
35 ures. If the trigger 91 is maintained in its de
pressed position the slide 2'I with its associated
parts immediately moves forward to the position
shown in Figs. 2, 3 and 6, thus releasing the main
sear 83 in the manner already described. Firing,
40 however, does not immediately occur for the
reason that the hammer is still held by the auxil
iary sear Iü2. However, as soon as the cam sur
face II'I on the slide 21 moves out of the way
of the lever H2 the said lever starts to move
relatively slowly in the counter-clockwise direc
tion, the extension H2a thereof eventually en
gaging the slide IEM as shown in Figs. 5 and 11.
The slide IM is then pushed forward to release
the sear H32 and thus permits the hammer to
V50 move and cause firing as shown in Fig. 6.
With
this retarding mechanism in use the rate of ñre
may be very much less than it otherwise would
be, the amount of decrease in the rate being in
large measure dependent upon the size of the es
55 capement weight I Iß.
It will be observed that when the retarding
mechanism is used the main sear 33 normally
has no control of the firing, but the said sear
nevertheless serves as a safety means to prevent
60 premature release of the hammer in the event
65
of any jamming or malfunctioning of the gun.
The sear 83 prevents release of the hammer before
the breech bolt reaches its forward locked posi
tion.
The retarding mechanism serves not only to
decrease the rate of fire but also to increase ac
curacy. The momentary delay between the clos
ing of the breech and the firing of the cartridge
permits vibrations to expend themselves so that
70 the gun is in a static condition at the instant of
firing.
In order that the retarding mechanism may
be rendered inoperative when not required, there
is preferably provided a transverse shaft or pin
.75 H8 adapted to be oscillated by means of a lever
I I9 on the exterior of the casing. Secured to the
pin H8 is> a linger or projection |20 which is
projectable into the arc of movement of the lever
I I2, as shown in Fig. l0, to positively maintain it
in its rearward or inoperative position. Associ
ated with the finger £20 is a projection I2I which
engages an extension IMb on the slide |04 to hold
the slide in its forward position and to thus hold
the sear |92 in its inoperative position, as also
shown in Fig. l0. With the parts in this posi 10
tion the retarding mechanism is entirely inoper
ative and the action of the gun is exactly the same
as it would be if the said mechanism were not
provided.
By moving the lever H9 in the counter-clock 15
wise direction the finger I2!) and the projection
i2I can be moved to the positions shown in Fig.
ll, thus freeing the retarding mechanism and
permitting it to operate in the manner which has
already been fully described.
20
What I claim is:
l. An automatic firearm comprising in combi
nation, a barrel, a breech casing carrying the
barrel, a longitudinally movable breech bolt in the
casing, an operating slide automatically and rec 25
tilinearly movable rearward upon firing and
biased for automatic return movement to its for
ward position, pivoted link mechanism connecting
the breech bolt with the.` slide and enabling the
latter to move the former, automatic means asso
30
ciated with the bolt and serving during rearward
and forward movements thereof to feed cartridges
successively to the chamber of the barrel, a firing
pin carried by the bolt and movable longitudinally
relatively thereto, a hammer pivoted to the cas 35
ing and serving when released to actuate the lir
ing pin, a scar for holding and releasing the ham
mer, means for cooking the hammer during rear
ward movement of the slide, and an upward pro
jection on the slide for moving the sear to release 40
the hammer when the slide reaches its forward
position.
2. An automatic firearm comprising in combl
nation, a barrel, a breech casing carrying the
barrel, a longitudinally movable breech bolt in the 45
casing, an operating slide automatically and rec
tilinearly movable rearward upon firing and biased
for automatic return movement to its forward
position, pivoted link mechanism connecting the
breech bolt with the slide and enabling the latter
to move the former, automatic means associated
with the bolt and serving during rearward and
forward movements thereof to feed cartridges
successively to the chamber of the barrel, a firing
pin carried by the bolt and movable longitudinally 55
relatively thereto, means on the firing pin engage
ablc by the pivoted link mechanism for retracting
the firing pin relative to the bolt, a hammer piv
oted to the casing and serving when released to
actuate the firing pin, a sear for holding and re
leasing the hammer, means for cooking the ham
mer during rearward movement of the slide, and
60
means on the slide for moving the sear to release
the hammer when the slide reaches its forward
position.
65
3. An automatic firearm comprising in combi
nation, a barrel, a breech casing carrying the
barrel, a longitudinally movable breech bolt in the
casing, an operating slide automatically movable
rearward upon firing and then automatically re 70
turning to its forward position, link mechanism
connecting the breech bolt with the slide and en
abling the latter to move they former, automatic
means associated with the bolt and serving during
rearward and forward movements thereof to feed
2,116,139
f1.0
cartridges successively to the chamber ofl the
a >breech casing, a sear, a scar release. movable to
barrel, a ñring pin carried by the bolt- and mov
able longitudinally relatively thereto, a hammer
pivoted to the casing, a sear for holding and re
leasing the hammer, and a striker carried by the
release to releasing position, means for controlling
the rate of ñre connected with said rlrst named
link mechanism and interposed between the ham
mer and the ñring pin when the bolt is in its for
ward position, the said striker thus enabling the
to be moved to releasing position, means for pre
venting the iirst means from moving the sear re
lease, and a second means for moving the sear re
~hammer when released to actuate the firing pin.
4. An automatic firearm comprising in combi
nation, a barrel, a breech casing carrying the
barrel, a longitudinally movable breech bolt in
lease to releasing position and for holding the
10
same in said position.
10. In combinationin-an automatic firearm, a
barrel, a breech casingcarrying the barrel, a lon
gitudinally movable breech bolt in the casing, a
the casing, a longitudinally movable operating
slide adjacent the bolt which upon iiring auto
longitudinally movable operating slide adjacent
the bolt, two connected operating links pivotally
connected respectively with the bolt and with the
rearward to a greater extent than the bolt, two'
connected operating links pivotally connected re
spectively with> the bolt and with the slide, the
bolt connected link when the bolt and slide are
ments thereof to feed cartridges successively to
,the chamber of the barrel, a firing pin carried by
the bolt and movable longitudinally relatively
inforward positions serving to lock the bolt and 20
the-slide connected link upon rearward movement
of the slide serving to effect unlocking and then to
move the other link and the bolt rearward, a ñring
pin on- the bolt longitudinally movable relatively
thereto, a hammer pivoted to the casing and serv 25
ing when released to actuate the iiring pin, a sear
for holding the hammer, means for cooking the
thereto, a hammer pivoted to the casing, a sear for
hammer during rearward movement of- the slide,
holding and releasing the hammer, and a striker
carried by the slide connected link and interposed
means for moving the sear to release the hammer
after a predetermined interval of time following 30
the movement of the bolt to its forward position,
ybetween the hammer and the firing pin when the
bolt is in its forward position, the said striker thus
the firing pin.
5. In an automatic ñrearm, the combination of
a breech casing, firing means, sear mechanism for
holding the firing means in non-firing position,
actuating means for moving the sear mechanism
to inoperative position, means for positively pre
40 venting said actuating means from moving the
sear mechanism, and a second means for moving
the sear mechanism to inoperative position and
for holding the same in said position.
6. In an automatic firearm, the combination of
and means dependent on the rearward movement
ofthe slide for resetting the sear moving means.
11A.A In combination in an automatic firearm, a
barrel, a breech casing carrying the barrel, a lon 35
gitudinally movable breech bolt in the casing
automatically movable rearward upon firing and
biased for automatic return movement to its for
ward position, a ñring pin carried by the bolt and
movable longitudinally relatively thereto, a ham 40
mer pivoted to the casing and serving when re
leased to actuate the ñring pin, a sear for holding
the hammer, means for cooking the hammer dur
ing rearward movement of the bolt, a longitudi
a breech casing, a sear, a sear release movable to a , nally movable slide for moving the sear to release 45
the hammer, and spring means for automatically
sear releasing position, means to move the sear
release to releasing position, means for prevent
ing the i'lrst means from moving the sear release,
50
means to move the same to cause the sear release
the bolt which upon ñring automatically moves 15
enabling the hammer when released to actuate
45
a sear releasing position, means to move the sear
matically moves rearward to a greater extent than
slide, the bolt connected link when the bolt and
slide are in forward positions serving to lock the
bolt and the slide connected link upon rearward
movement of the slide serving to eñ‘ect unlocking
and then to move the other link and the bolt rear
ward, automatic means associated with the bolt
and serving during rearward and forward move
p39
5
moving the slide in the sear releasing direction to
release the sear after a predetermined interval of
and a second means for moving the sear release to
time following the movement of the bolt to its
releasing position and for holding the same in
forward position.
said position.
7. In an automatic ñrearm, the combination of
a breech casing, a sear, a Sear release movable to
a sear releasingv position, a lever pivoted to the
55 casing and engageable with the sear release to
move the same to releasing position, means
mounted on the casing projectable into the arc of
movement of the lever for preventing engagement
of the same with the sear release, and means for
60 moving the Sear release to releasing position and
for holding the same in said position.
8. In an automatic ñrearm, the combination of
a breech casing, a sear, a Sear release movable to
a sear releasing position, a lever pivoted to the
casing
and having a projection thereon for en
65
gagement with the sear release to move the same`
to releasing position, and means pivotally mount
ed on the casing having two projections thereon,
one for engagement with the projection on the
lever for preventing engagement of the latter
V70 with the sear release and the other for engagement
with the sear release to slide the same to releas
ing position and for holding the same in said posi
tion.
9. In an automatic ñrearm, the combination of
75
50
12. In combination in an automatic firearm, a
barrel, a breech casing carrying the barrel, a lon
gitudinally movable breech bolt in the casing auto
matically movable rearward upon firing and
biased for automatic return movement to its for 55
ward position, automatic means associated with
the bolt and serving during rearward and forward
movements thereof to feed cartridges successively
to the chamber of the barrel, a firing pin carried
by the bolt and movable longitudinally relatively 60
thereto, a hammer pivoted to the casing and serv
ing when released to actuate the ñring pin, a scar
for holding the hammer, means for cooking the
hammer during rearward movement of the bolt, a
longitudinally movable slide for moving the sear 65
to release the hammer, means for moving the
slide in the sear releasing direction to release the
sear after a predetermined interval of time follow
ing the movement of the bolt to its forward posi
tion, and a single manually operable means for 70
holding the slide moving means in an inoperative
position and for holding the slide in the position
corresponding to the releasing position of the sear.
13. In combination in an automatic ñrearm, a
barrel, a breech casing carrying the barrel, a lon
75
' 6
2,116,139
gitudinally movable breech bolt in the casing
automatically movable rearward upon ñring and
biased for automatic return movement to its for
Ward position, a firing pin carried by the bolt and
movable longitudinally relatively thereto, a ham
mer pivoted to the casing and serving when re
leased to actuate the ñring pin, a main sear for
holding the hammer, an auxiliary sear for also
holding the hammer, means for cooking the ham
10 mer during rearward movement of the bolt, means
for moving the main sear to its hammer releasing
position, which means acts immediately upon the
movement of the bolt to its forward position, and
means for normally moving the auxiliary sear to
15 its hammer releasing position after a predeter
mined interval following the movement of the
bolt to its forward position.
14. In combination in an automatic firearm, a
barrel, a breech casing carrying the barrel, a lon
20 gitudinally movable breech bolt in the casing, a
longitudinally movable operating slide adjacent
the bolt which upon ñring automatically moves
rearward to a greater extent than the bolt, two
connected operating links pivotally connected re
25 spectively with the bolt and with the slide, the bolt
connected link when the bolt and slide are in for
ward positions serving to lock the bolt and the
slide connected link upon rearward movement of
the slide serving to eiîect unlocking and then to
30 move the other link and the bolt rearward, a ?ir-'
ing pin on the bolt longitudinally movable rela
tively thereto, a hammer pivoted to the casing and
serving when released to actuate the firing pin, a
main sear for holding the hammer, an auxiliary
sear for also holding the hammer, means for cock
ing the hammer during rearward movement of the
bolt, means for moving the main sear to its ham
mer releasing position, which means acts immedi
ately upon the movement of the bolt to its for
Ward position, means for normally moving the
auxiliary sear to its hammer releasing position
after a predetermined interval following the
movement of the bolt to its forward position, and
means on the operating slide and acting during 10
rearward movement thereof for resetting the
means for moving the auxiliary sear.
15. In combination in an automatic firearm, a
barrel, a breech casing carrying the barrel, a lon
gitudinally movable breech bolt in the casing 15
automatically movable rearward upon ñring and
biased for automatic return movement to its for
ward position, a ñring pin carried by the bolt and
movable longitudinally relatively thereto„a ham
mer pivoted to the casing and serving when re 20
leased to actuate the ñrìng pin, a main sear for
holding the hammer, an auxiliary sear for also
holding the hammer, means for cooking the ham
mer during rearward movement of the bolt, means
for moving the main sear to its hammer releasing 25
position, which means acts immediately upon the
movement of the bolt to its forward position,
means for normally moving the auxiliary sear to
its hammer releasing position after a predeter
mined interval following the movement of the 30
bolt to its forward position, and means for moving
the auxiliary sear to an inoperative position and
for holding the same in said position.
MARRINER A. BROWN'ING.
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 138 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа