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G. WEBB
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FEEDING MECHANISM FOR AUTOMATIC FIREARMS
Filed Dec. 23, 1943
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FEEDING MECHANISM FOR AUTOMATIC FIREARMS
' Filed Dec. 23, 1945
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FEEDING MECHANISM FOR AUTOMATIC FIREARMS
Filed Dec. 25, 1943
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2,469,461
G. WEBB
FEEDING MECHANISM FOR AUTOMATIC FIREARMS
Filed Dec. 23, 1945
4 Sheets-Sheet 4
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2,409,461
Patented Oct. 15, 1945
UNE'IED STATES PATENT OFFICE'
2,409,461
FEEDING MECHANISM FOR AUTOMATIC
FIREARMS
George Webb, Hartford, Conn., assignor to Colt’s
Patent Fire Arms Manufacturing Company,
Hartford, Conn, a corporation of Connecticut
Application December 23, 1943, Serial No. 515,392
3 Claims. (Cl. 89-33)
2
This invention relates to mechanism for op-v
erating the feed slide of an automatic ?rearm.
The invention primarily but not restrictively
pertains to an automatic ?rearm adapted to ?re
cartridges of 21. caliber substantially larger than
ri?e caliber and of the order of 37 mm. in caliber,
tion of the feed box and breech casing and illus
trates details of the feeding mechanism.
Fig. 5 is a fragmentary top plan view princi
pally illustrating the feed box with the cover
removed to expose the component parts of the
feeding mechanism which occupy their normal
positions at the commencement of the feeding
The construction comprising the invention is read
stroke of the feed slide.
ily adaptable to a ?rearm of the type basically
Fig. 6 is a view similar to Fig. 5 but showing
illustrated in U. S. Patent 1,525,065 to Browning
but more particularly to the ?rearm illustrated in 10 the component parts of the feeding mechanism
in their positions substantially at the completion
co-pending U. S. patent application, Serial No.
of the feeding stroke of the feed slide.
325,405, new Patent No. 2,375,452, in the name
Fig. 7 is a fragmentary top plan view of the
of George Webb, ?led March 22, 1940, the ?re
feed box and a magazine and illustrates the feed
arm illustrated in said Webb patent constituting
an improvement of the ?rearm illustrated in said 15 slide in its position in the feed channel at the be
ginning of its feeding stroke and a feeder par
Browning patent.
tially disposed in said feed channel.
It is an object of the invention to provide an
Fig. 8 is‘ a fragmentary side elevation of the
improved mounting means for the feed lever
construction shown in Fig. 7.
whereby said lever may be more expeditiously re
moved from the feed box, when desired, than 20 Fig. 9 is a fragmentary plan view of the mount
ing means for the feed lever showing said means
the feed lever illustrated in said Patent 2,375,452.
transposed 180° from its position in Figs. 5 and 6,
Relative to the foregoing object, it is still an
said view also showing the pivot pin in full lines
other object of the invention to provide a feed
in its normal operative position and also illus
lever mounting pin and the feed lever supporting
block with means whereby the pin may be uti 25 trating in dotted lines the feed lever removing
lized as a support for the feed lever while said
feed lever is being removed from the feed box.
Only su?icient of the details of the ?rearm are
herein described to afford an understanding of
position of the pivot pin.
describes the foregoing objects as well as other
objects of the invention. For a complete under
operative position and in dotted lines its partially
standing of all details and functions of the ?re
arm illustrated in the accompanying drawings but
not forming a part of the present application, at
tention is directed to said Patent 2,375,452.
The accompanying drawings show the embodi
ment of the invention which is deemed prefer
able, but it will be understood that the drawings
are intended for illustrative purposes only and 40
The present invention comprises an improved
mouting means for the feed lever. More par
Fig. 10 is a fragmentary side elevation of the
construction shown in Fig. 9 and partially sec
tioned on the line l?—-l 0 of Fig. 9, said view illus
the present invention, but the following fully 30 trating in full lines the feed lever in its normal
are not to be construed as de?ning or limiting
removed position.
'
ticularly, the improved mounting means permits
the removal of the feed lever without necessitat
ing the removal of any of the'intermediate mech- .
anism which connects said feed lever with the
‘feed slide. Such removal is accomplished by par
tially moving the feed lever pivot pin inward of
the feed box in an axial direction until it is re- -
moved from its seat in the mounting block and
then the pivot pin is moved in a substantially ver
part of this speci?cation being relied upon for
tical direction out of the feed box while still in
that purpose.
In the drawings,
45 engagement with the upper end of the feed lever,
whereby the feed lever is simultaneously removed
Fig. 1 is a fragmentary side elevation of the
from the feed box by the pivot pin.
?rearm and illustrates the breech casing and feed
This construction is to be distinguished from
box assembled in operative position as well as
that illustrated in said Patent 2,375,452 and
one type of magazine mounted on the right side
of the feed box.
50 wherein to effect removal of the feed lever it was
?rst necessary to remove a bell crank connecting
Fig. 2 is a top plan view of the mechanism
the feed lever with the feed 'slide lever before
shown in Fig. 1.
.
ready access could be gained to the feed lever.
Fig. 3 is a fragmentary rear end elevation of
Following this, the feed lever pin was entirely
the ?rearm shown in Figs. 1 and 2.
the scope of the invention, the claims forming a
Fig. 4 is an enlarged fragmentary side eleva-v 55 removed from the feed box while the feed lever
2,469,461
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was held from falling into the breech casing and,
of the next feeding stroke of the feed slide. Said
subsequently, the feed lever was lowered from its
.
positicn in the supporting block until the lever
was clear thereof and could be then laterally
moved inward and ?nally vertically to effect re
moval thereof from the feed box. It will thus
be seen that the improved construction compris
ing the present invention represents an advanta
geous saving of time as well as greatly facilitat
ing the ease of manipulation of the feed lever to 10
over-travel of the feed pawls is clearly shown in
Fig. 8. When the feed slide commences to move
remove it from the feed box.
.
Referring to the drawings, breech casing I9 re
ciprocably supports at one end the breech of a
tube or barrel £2. The breech of the barrel is
secured to one end of barrel extension M which
includes a pair of rearward extending arms i8
and is reciprocably mounted within the breech
casing. The right hand arm i6 carries an out
ward projecting lug i8 for purposes to be de
scribed.
20
in feeding direction, toward the left side of the
feed box, 9. cam 48 provided on the forward left
hand corner of the feed slide engages a lug 56 on
stop pawl [3-2 and earns said pawl from engage
ment with the particular notch 46 in the feeder
which then accommodates said pawl, whereby the
feeder may be then moved in feeding direction by
the feed slide inasmuch as the feed pawls 40 have
by then been respectively received in a pair of
the feeding apertures 42 in the feeder.
In order that there will :be no substantial retro
grade movement of the feeder particularly during
the time the feed slide is moving in retrograde
direction, a holding pawl 52 is also pivotally
mounted on forward grooved bar 38 in spaced re
lationship to stop pawl 64. Said holding pawl is
normally biased by spring plunger 54 in a direc
Surmounting and detachably secured to the
tion to engage one of the notches 46 in the side
breech casing it is a feed box 29 which primarily
flange of the feeder.
'_
contains most of the feeding mechanism. As
For a complete understanding of all of the oper
mentioned above, the present feed box is adapted
ations and functions of both the stop pawl 44 and
for feeding a loaded feeder from the right hand 25 holding pawl
attention is directed to the de
side of the feed'box toward the left hand side
scription of similar pawls set- forth in said Patent
as viewed in Figs. 5 and 6 when looking forward
2,375,452, the only difference being that in the
of the ?rearm. Thus the right hand side of the
presently described feed slide and pawls, the shape
feed box is provided with an opening 22 of proper
of the pawls' and the cams on the feed slide are
size and shape to readily admit a feeder 24 loaded
with cartridges 26 into the feed box. Opening
22 comprises part of the entrance end of the feed
channel 28 which is otherwise de?ned by a pair
of opposed stripper cams 3G. The stripper cams
such that they will properly function while the
feed slide moves in feeding directionfrom right
are respectively provided on their under side with
similarly curved cam surfaces 32 (Fig. 8) which
serve to strip cartridges from the feeder as the
loaded feeder is moved from the exit of a maga
zine 33 through the feed channel from the right
side of the feed box toward the left side thereof.
The upper surfaces of said cams are horizontal
to left as distinguished from a feed slide moving
in feeding direction from left to right which is
described in said patent.
The right hand side of the feed box 29 is pro‘
vided with a bracket 55 which pivotally supports
a feed slide lever 58 intermediately of its ends.
The forward end of the lever 58 is connected to
the feed slide by being disposed in a suitable notch
99 provided on the upper surface thereof. The
rearward end of said lever is provided with an
and comprise a support for the outward proj ect
upstanding ‘stud B2. A spring-pressed plunger 59
ing ?anges provided at the top of the feeder links
carried by bracket 56 engages ‘a lateral projection
and respectively extending outward in opposite
58' on feed slide‘ lever 58 to normally bias the‘
directions. The left side of the feed box is pro 45 forward end of said lever toward the right hand
vided with an exit opening 34 which is slightly
side of the feed box whereby the feed slide en—
wider than the feeder per se and de?nes the exit
gaged by said end of the lever will normally be
end of the feed channel.
positioned to commence its feeding stroke.
Feed slide 33 is reciprocably mounted in the
The right hand side of the feed box 23 is also
upper portion of the feed channel 28 and is sup
provided with another bracket 64 which supports
ported in operative position by a pair of spaced
a vertical pintle '65.‘ A bell crank lever 68 is pro
grooved bars 38. The feed slide is provided with
vided intermediately of its ends‘ with; a bearing ‘H3
a pair of feed pawls 46 adapted to engage spaced
adapted to receive pintle 65 and be pivotally sup
openings or feeding apertures 42 provided in the
ported thereon. One end of lever 68 is provided
tops of the feeder links. It will be understood
with an elongated slot 12 which receives stud 52.
that the ?rearm herein described will operate sat
The other end of lever G3 is‘ provided with another
isfactorily with either ?exible articulated-link
elongated slot ‘74. Both elongated slots ‘l2 and '14
feeders or with rigid feeders, both of which are.
preferably extend substantially radially from
described in detail in said Patent 2,375,452.
bearing 19.
The forward grooved bar 38 is provided with 60
The left hand side of feed box 28 is provided
a spring-biased stop pawl 44 pivotally mounted
near its rearward end with a bracket ‘i6 which
thereon and having a tooth adapted to succes
supports a Vertically extending pintle 18. A
sively enter spaced notches 46 provided in one
second bell crank lever fit is provided in its inter
side flange of the feeder to prevent over-feeding
mediate portion with a vertically extending bearof the feeder in feeding direction. Said pawl 44 65 ing aperture adapted to receive pintle 18 so as
is in position to engage one of the notches 46
to be pivotally supported thereon. One end of
bell crank lever 89 is provided With a depending
at the commencement of each movement of the
feed slide in feeding direction. ‘As in the con
lug 82 received in slot ‘Hi in one end of hell crank
struet'on of the feed slide and feed pawls de
lever 63. The other end of bell crank lever 88
scribed in said Patent 2,375,452, the amount of 70 is provided with a vertically extending bearing 84
movement of the feed slide in retrograde or coun
ter-feeding direction is such that there is a cer
tain amount of over-travel of the pawls 48 with
respect to the feeding apertures L32 which are to
be engaged by said pawls at the commencement 75
partially open at one side as clearly shown in
Figs. 5 and 6. The arm of the bell crank lever
containing bearing 84 is at a considerably lower
level than the arm which carries lug 82 as shown
in Fig. 4.
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2,409,461
’ 6
Also supported on the right hand side of the
tioned to commence its feeding stroke‘, the bell
feed box is a generally rectangular block 86 se
cured to said side by any suitable means such as
crank levers 98 and 89 will be moved by said
feed slide lever so as to, in turn, position the
feed lever 92 with its lower end in itsrearward
position shown in dotted lines in Fig. 4, said po
rivets 89. Said block is provided intermediately
of its sides with an aperture 99. Said aperture
"at the top of the block is substantially rectangular
in shape but in sectional side elevation the con
?guration of the aperture is irregular as shown
in Fig. 10 but the aperture generally is ?ared out~
ward at opposite sides toward the bottom of the
block for purposes to be described. The aperture
9!! accommodates the upper end of feed lever 92.
Said upper end of the feed lever is preferably
rounded and is also provided with a transverse
sitioning of the feed lever being made possible
by the ?ared lower end of aperture 9i]. Said
feed lever is in this position at the time ?ring
of a cartridge in the ?rearm occurs.
Following the ?ring of a cartridge, the barrel
extension moves rearward in recoil direction and
lug I8 carried by arm I6 of the barrel extension
slides past the lower end of feed lever 92 to the
rearward dotted line position of lug I8 shown
bearing 94 adapted to receive and be pivctally 15 in Fig. 4. The flared lower end of aperture 99
in block 85 is su?iciently large to permit move
supported by a pivot pin 99.
ment of the feed lever slightly farther rearward
Pivot pin 99 is removably supported at one end
than indicated in the rearward dotted line posi
in a cylindrical bearing 98 provided in one side
tion thereof shown in Fig. 4, whereby lug IS
wall or block 86 and also in an aligned cylindrical
bearing IIl? formed in the right hand side of the 20 may slide under the lower end thereof. Block
86 is also provided respectively at opposite sides
feed box 29. Intermediately of its ends, the pivot
of the flared lower end of aperture 90 with a
pin 85 is provided with an enlarged cylindrical
pair of spring-pressed plungers II8 which are
portion I02 which is provided on its outer surface
each mounted so as to project normally from
with an ‘annular groove Illll. Said enlarged por
tion IE2 is accommodated in an opening I 35 ex 25 opposite side walls of aperture 913 as clearly
shown in Figs. 4 and 10.
tending between and intersecting one wall de?n
After lug 58 has moved rearward past the
ing aperture 98 and the inner side wall of block
lower end of feed lever 82, the rearwardmost
86. The upper and lower portions of said open
springepressed plunger IE8 will restore the feed
ing I96 are substantially rectangular'in plan view
but the intermediate portion of said opening is -30 lever to the rearward dotted line position shown
in Fig, 4 and wherein lug I8 will engage said
circular in side elevation and the opposed walls of
lower end of the feed lever when the lug is moved
said intermediate portion of the opening define
in counter-recoil direction by the counter-recoil
an interrupted cylindrical bearing adapted to
movement of the barrel extension. The forward
accommodate the enlarged portion I82 of pivot
pin 96. Said cylindrical bearing thus formed in 35 or counter-recoil movement of lug I8 thus moves
feed lever 92 forward to, in turn, oscillatethe
opening I96 comprises a support for the inner
bell cranks 8i! anad 68 and also feed slide lever
end of pivot'pin 96.
58 to move the feed slide in feeding direction
A suitable cylindrical opening I88 extends ver
toward the left side of the feed box. Hence, the
tically through block 86 at one side of opening
feed slide is moved in feeding direction during
i536 and receives a headed locking pin Hi}. The
the counter-recoil movement of the barrel ex
position of the opening IE8 is such that it inter
tension. The feed lever 92 will be moved sub
sects the cylindrical bearing portion of the open
stantially to the forward fragmentary dotted line
ing I535 whereby the pin I19 is disposed in a por
position shown in Fig. 4 although the lug I8
tion of annular groove I54 formed in the enlarged
?nally moves forward a short distance past the
portion H32 of pivot pin 95 when said pivot pin is
position where it disengages the lower end of
disposed in operative position in block 89. This
feed lever 92.
is clearly shown in full lines in Fig. 9. Locking
The biasing effect imparted by spring-pressed '
pin Ill! is made suil'iciently long that the lower
plunger 59 to feed slide lever 58 restores the feed
end extends below the bottom of the block 86
when the pin is in looking position. Said project 50 slide to the position it occupies at the commence
ment of its feeding movement and simultaneously
ing lower end of the pin may be readily engaged
restores feed lever 92 to the rearward dotted line
by the ?nger of a mechanic or by a suitable tool
position illustrated in Fig. 4 and in which posi
to raise the pin and su?iciently expose the head
tion said feed lever remains until the barrel ex
' on the upper end thereof that it may be grasped to
effect removal of the pin from opening I88 and 55 tension once more engages it after moving to
full recoil position. Such movement of the feed
> thus permit pivot pin 95 to be moved laterally to
slide by the biasing effect imparted to the feed
disconnect the same from block 86. Looking pin
slide lever 58 is made possible since the lower
IE6 is held in operative position in block 86 by
end of feed lever 92 has been completely disen
the feed box cover, to be described.
Pivot pin 98 is provided on its inner end with 60 gaged by lug I 8 on the barrel extension. Fol
lowing each full recoil movement of the‘ barrel
an extension or knob II2 provided with an outer
extension, the cycle of movement of the elements
- knurled surface and adapted to be manually
comprising the feeding mechanism, as described
' engaged to manipulate the pin for purposes to be
in the foregoing, recurs.
described.
Should it be necessary or desirable to recipro
Intermediately of its ends, feed lever 92 is pro 65
cate the feed slide independently of the mech
vided with a laterally extending cylindrical lug
anism in the ?rearm which automatically recip
or projection Iid which pivctally supports a cyl
rocates said slide during the ?ring of the ?re
inder l I5 which is slidably and rotatably received
arm, an auxiliary manually operable charging
in bearing 8?!- provided in bell crank lever 86.
The lower end of feed lever 92 is su?lciently long 70 device I29 is carried by the cover I22 of the feed
box and is provided with cam means I24 adapted
that it extends into breech casing I9 as shown
to engage a projection I25 on the feed slide to
in Fig. 4. Since feed slide lever 58 is normally
reciprocate the feed slide in feeding direction
biased by spring-pressed plunger 59 so that its
when the charging device I29 is actuated. Said
forward end is toward the right hand side of the
feed box whereby the feed slide is normally posi 75 charging device and its function are fully de
7
vsl'iribed in detail in said Patent 2.375A52iandi-at- I I
tention is directedthereto for a fuller under-v
standingof said device.
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Isecuredtdaportionrofa:firearmrfor supportand
,
I sides thereofltorreceive one-endIof‘said‘feed'lever,
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I It willqthus be seen that the-feeding mech
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rovi'ded withran. aperture Zintermediate opposed
‘
said block'alsmhaving a clearance ‘opening in-I I
anismxprovides means adaptedato normally feed,
' thefeed slide in feeding direction from the right
side of the feed box toward the .left,;n'otWith-' I
standing thefachthat the feed lever comprising ‘
part of said feeding Imechanismwis mounted'on I I
I the rightsideof the .feed ‘box, the sameas the I10
tersecting said aperture‘ and one side of 'said:block
and *said opening :being of less widththan‘ said‘
end-of said .Ifeedieveribut su?icie'ntly wide'to pass I
‘saidprojection when longitudinally movingrsaid
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feed lever through said aperture "incident itolree
moving ‘said 'feed Tlever from :said block, :and a
feed lever of the feeding .mechanism described , ‘ ‘ pivot pin. removably carried by said block and , ' , ' ,
' and illustrated in saidIPatent12,375,¢l52' but in I extending -through"said end Iofisaid‘feed lever to
pivotally securethe same to said bloclnsaid pin
which patentthe feed slide is moved in feeding
direction fromithe left side of the reed box, to-,
ward
the
right'side;
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whenin operative position having a portion'ene, ' , ' ,
.15 gaging, at least a portion» of the walls-of said open
ing to provide at least partial support 'for said
It'will also be seen that the feed llevermay be
' readily removed from the feed box when desired
pin.
' or when necessary by ?rst removing pin Ht fromI I
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2., In combination, a ?rearm éfeed lever pro_
vided Iwith'aprojection extending laterally from
block: 86 and thenaxially moving vpivot pinv 95
"bymeans'of'manually engageable knob 5 !2 until "20 one sideithereof rand adaptedtov engage I' a com-v
' ,
ponent partofIIa ?reaIrm,IIa-block adapted'to be ~ ~
the outertend of :the pivot pin has been ' disen- I
secured to aportion of‘a ?rearm forsupport and
.gage'd'from bearings'I?? and-ltd but Without re
provided with anIaperture intermediate opposedv
sidesithereof toreceive Ioneendoflsaid‘feed lever,
' moving said end of the pivot pin from'the bear
ingin the end otthe feed lever. ‘such'move-I
said‘bleck additionally'having a supportingopen
.ing andalso a clearance opening:intersecting{saidv
aperture and one sideof saidIblock'and said
pin to be moved Iverticallyupward so as tosi-I
multaneously move the .feed lever .vertically'up-I I ,clearanceopeningrbeingrof less‘width than said
' ward through aperture '90; The feed levermay ~ end of said feed lever 'Ibut 'zsu?icie'ntly wide to
:becom'pletely removedfrom the feed box by so 30 pass said , projection “when longitudinally moving
ment of the pivot pin removes enlarged portion
H32 from the opening P355 and permits the pivot
‘movingthe lever for its full length upward I . said Ifeed ‘lever through said aperture incident
through said, aperture, particularly since ine ~ ~ to'removing said feed levervfrom ‘said 'blockgand
I tersecting' opening we is su?iciently'wide to ac—
‘ commodate or :pass lug 1H4 therethrough while
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the feed lever is ‘being moved in the manner‘ de-~ 35
scribed.v
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andalsoextending into said supporting opening I
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, to pivotally ‘secure-the ~feed lever to‘said block,
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said pinwhen in operative position also having '
Prior to removing the feed lever from the feed I
box,Iit is, advisable, though not necessary, to ?rst ~
I move bell crankBll slightly ‘forward in-the feed
a, pivot pin removablycarriedby said‘block and
extending throughsaid-end of :said Ifeed lever
I a. portion engagingat leastaportion of the walls
I
of said opening to provide in conjunction'with
box, such as by moving the outer end of feed 40 said supporting opening a supportyfor said pin.
slide 38 in retrograde direction, until lug H4
3. In combination, a ?rearm feed lever pro
videdwith a projectionextending laterally from
becomes substantially vertically aligned with
one side thereof and ‘adapted toengage a com
opening we‘. Suchiforwardrmovement of .theibell
ponent partlof a'?rearm.Ia<blookradapted to be
crank 88 will also provide more space in which
to manipulate’knob ‘H2 since the rearward end 45 secured to a portion of a-?rearmior support and
of bell crank lever168 will thus'be moved forward 7
provided with an aperture :intermediate opposed
and away from block 88 during such movement
sidesthereof to receive one end of said feed lever,
of bell crank 8.5. ‘Inasmuch as the arm of hell
said'lolock'additionally having a supporting open—
crank lever :30 which contains "bearing'M and
ing and also a ‘clearance opening intersecting
cylinder Ill 5 are below the level of knob I I2, these said aperture and one'side-ofsaid block ‘and said
elements will comprise no obstruction while ma
clearance opening being-of ‘less width'than said
nipulating .‘pivot. pin 196 'by means .of said knob.
Conversely, feed lever 92 may'beire-inserted in
endof said'feed lever butxsuf?ciently wide to pass
said projection when‘longitudinally moving said
feed leverthrough said aperture incident to re
its operativepos'ition in block 86 by reversing the
operation described in the foregoing with respect 55 moving said <feed'lever‘from .said block, :a pivot
pin removably carried <bysaid block and extend
to withdrawing or removing said feed lever from
ingthrough saidIIend of 'said feed lever and also
said feed box and block.
extending into said supporting opening topivot
While the invention has been illustrated and
described in ‘its preferred embodiment and has
ally secure the feed lever "to said block,‘said pin
included certain details, it should beunderstood 60 when in operative position .alsohaving a‘ portion
engaging at-leastIIaportionoffthewalls of said
that the invention is not to be limited to ‘the
Iopeningto provide inconjunction with said sup
precise details herein illustrated and described
porting opening a support for saidpin, and man
since the same maybe carried out‘in :other ways,
ually engageable means carried by saidpin and
falling within the scope of the invention as
.by which said pin may be withdrawn from said
claimed.
supporting opening, saidmeans I‘alsoserving in
What I claim is:
conjunction with said pin to provide a support
1. In combination, a ?rearm feed lever ,pro
vided with a projection extendingzlaterally from
by'which said feed lever maybe removed from
said block.
one side thereof .and ‘adapted to engage "a com
ponent part of a ?rearm, a block adapted to be 70
GEORGE WEBB.
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