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Патент USA US2132761

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Oct. l1, 1938.
R. c. ROBERTSON
2,132,761
FIREARM'
Filed MaI‘Ch 28, 1955
3 Sheets-Sheet l
I*nventor
Attorney
~Üct. l1, 1938.
R. c. RQÉÉRTSON
.
2,132,761
FIREARM
Filed March 28, 1935
3 Sheets-Sheet 2
1mwn m
Oct. 1l, 1938.
R. c. ROBERTSON
.FIREARM
2,132,761
l
- Filed March 2a, 1955
3 sheets-sheet :s
Inventor
BYQ
Attorney
2,132,761
Patented Oct. 11, 1938
UNETEÜ STÃ'ÈÈS PATENT ÜFFEQE
2,132,761
FIREARM
Roy Clifton Robertson, Pocahontas, Miss.
Application March 28, 1935, Serial No. 13,535
6 Claims.
The present invention relates to new and use
ful improvements in the general art of firearms
and more especially to firearms of the rifle type.
An important object of the invention is to pro
31
vide a gun wherein cartridges are stored in a
special magazine which will permit the ready use
of a much greater quantity than can be retained
in repeating rifles of present day constructions.
Another important object of the invention is
l0 to provide an improved rifle that can be used as
a repeater or for single shots, with the change
15
20
25
30
over capable of being made by a simple manipu
lation.
Still another important object of the inven
tion is to provide a rifle employing but a single
trigger which can be set for automatic ñring,
single or repeating fire.
Various other important objects and advan
tages of the invention will become apparent to
the reader of the following specification.
In the drawings:
Fig. 1 represents a side elevational View of the
gun without the stock.
Fig. 2 represents a longitudinal sectional view
through the intermediate portion of the gun.
Fig. 3 represents a fragmentary sectional view
taken substantially on line 4_4 of Fig. 2.
Fig. 4 represents a fragmentary Vertical sec
tional view through the breech portion of the
rifle showing a cartridge being forced toward the
firing chamber.
Fig. 5 represents a perspective view of the
guide spring.
Fig. 6 represents a perspective view of the right
35 claw arm.
Fig. 7 represents a bottom plan view of the
magazine.
Fig. 8 represents a perspective view of the for
ward holder for the magazine.
40
Fig. 9 represents a plan view of the cam em
ployed with the magazine securing means.
Fig. 10 represents a side elevational view of
the cam shown in Fig. 9.
Fig. 11 represents a perspective view of the
rocker bar cartridge guide.
Referring to the drawings, wherein like nu
merals designate like parts, it can be seen that
numeral 5 represents the barrel of the rifle which
„o is threaded at its inner end into the forward
‘ `end 6 of the breech casing, the same being bored
as `at 1 for the reception of the cartridge.
Numeral 8 represents the guide-way for the
block 9. This block 9 is recessed to receive the
5,5 forward end of the recoil spring l0 which is con
(Cl. 42-21)
cealed in the guide way 8, the same being con
voluted around the guide rod Il.
The stock frame I2 has the breech casing se
cured thereto by the tapered pins i3 and the
rear end of this frame carries suitable tangs I4 5
whereby the same can be secured to the usual
wooden stock (not shown). This frame i2 in
cludes a left and a right wall spaced apart be
tween which mechanism is mounted which will
be described hereinafter.
10
The block 9 is provided with the conventional
firing pin l5, while disposed through the lower
portion of the rear end of this block is a pin
or bolt i6, equipped at one end with a head il
and at its opposite end with a laterally extend- 15
ing handle i8 disposed through a slot in the
wall of the guideway 8. A claw arm I9 is pro
vided on the left side of the block 9, while a
claw arm 2E! is provided on the right side of the
block and each is provided with an opening at u20
its rear end through which the aforementioned
pin or bolt i6 passes.
,
From the rear end of the arm 20 depends a
protuberance 2l deñning a shoulder. Springs 24
are provided on the end portions of the pin I 6 .25
to maintain the arms l9--2D against the block '
9, and it is to be understood that the openings in
the rear ends of the arms I9 and 28, are suf
ficiently large to permit a substantial outward
movement of the forward forked ends 25 of these 30
arms iti-2l).
As is clearly shown in the draw- ` `
ings, the ends 25 converge inwardly toward each
other, each being provided with reduced lugs
26-21, the same serving‘as claws so as to read
ily hook behind the head of a cartridge.
35
It can be observed that numeral 29 represents `
a pusher member carried by the block 9 which
serves to push the cartridge forwardly after the
cartridge has been placed in front of the block
by one of the claws or hooks 28.
The maga- 40
zine for the gun is generally referred to by nu- "
meral 3@ and its rear end protrudes into the
holder 3i at the rear end of the barrel 5. The
bottom side of the holder 3l is provided with a
small rod guide 33.
„à
The magazine generally referred to by numeral '
3B includes an elongated shell 35 of rectangular
cross section, and this shell is provided with a
longitudinally extending slot 3S on the bottom
side thereof. The forward end of this magazine l5‘0
35 is provided with an enlarged head construc
tion 3l which permits easy grasping and on this
head is a lug 38, the same being on the bottom
side thereof.
It will be observed that numeral 39 represents gli
2
2,132,761
a forward holder for the magazine 36, the same
is provided with a radially extending cavity 6l
having a bottom portion 'l0 on which the de
tent lli is swingably mounted, the said detent
having a cam projection ¿i2 on its inner side
flanges 52--E2 which operate through the afore
which is capable of engaging with the lug 38
on the magazine head 3l to secure the maga
zine head to the holder 39 so that these cannot
be displaced. Numeral @33 represents a loop or
strap on the holder 39 for snugly surrounding the
10 lower end portion of the barrel 5.
Operative in the magazine shell 35 is` the fol
lower, which includes theV outside plate- ¿lil con
nected to the internal cartridge-engaging mem»
15
20
25
30
35
ber 65 by pins or connectors
An elongated
conipressible coiled spring ¿ä's' is interposed in the
shell 35 between the head 3l and the member
45 of the follower.
Obviously by moving the follower back in the
shell 35 towards the head 3l, (if the tension be
comes too great to permit hand insertion of the
cartridges against the tension of the spring), the
tension of the spring will be released suiiiciently
to make the insertion or" the cartridges con
venient and without difñculty.
In further carrying out the construction of the
magazine, it will be seen that the bottom side of
the magazine 35 is extended to provide a lip fiil,
while the top side of the shell is extended and
bifurcated to provide the pair of downwardly
curved spring fingers ¿lg-@9 and the side walls
of the magazine are extended to provide small
extensions 5B, ,one for each side of the magazine
and these are spaced from the lip ¿i3 and fingers
‘39, as in the manner substantially shown in Fig.
7, and these serve to prevent lateral displacement
of the cartridges.
It can now be understood that the cartridges
are placed in the shell 35 in alternate fashion
with their cap or firing ends in oppositely dis
lîn othei- words, only alternate
cartridges have their ñring ends against ‘the same
side oi' the magazine shell.
40 posed positions.
An examination of Fig. 3 will now disclose the
cartridge receiver which includes a plate 5l hav
45 ing a reduced neck portion 52 at its rear end in
extending inwardly from its periphery, in the
mentioned slots 53-53 in the neck -portion 52
of the plate 5l (see Fig. 3). Pivotally connected
to the rockable guide t@ is a rod ‘33 which eX~
tends downwardly and operates through an open
ing in the brace bar Sli (see Fig. 4). A spring
t5 is interposed between the brace bar Sii and the
guide ,E56 so as to retain the guide always off 10
center so that its operation is solely dependent
upon the actuation of the block 9. .
Located above the spring plate ‘.56 and pivotally
connected at its upper end to the forward end
6 of the block 9 is the swingable guide 65, the 15
same being clearly shown in Figs. 2 and 4. This
swingable guide is in the form of an incline hav
ing side flanges tl between which a cartridge
can be guided while in movement toward the
chamber l, the bottom of thisy guide being pro 20
vided with a cleat 68.
Numeral 69 represents the hammer which is
bifurcated to provide depending leg members
'iii-dii. The hammer 69 is swingably supported
on the pin i3, the pin extending through the 25
opening in the legs il.
Pivotally secured to the hammer E9 at the point
‘ifi between the leg members 'iii-'il is the an
gularly shaped member l5 from the outer por
tion 'iii of which extends the elongated guide rod 30
Tl which passes through a guide l@ on the inner
side of the stock frame l2.
A coiled compressible spring 'i9 is convoluted
on this rod ll and interposed between the por
tions 'lö of the member 'i5 and the said guide i8. 35
Numeral ii@ represents the trigger guard de
pending from the frame l2. Numeral 8l repre
sents the trigger plate from which the trigger
member 82 depends, this trigger plate being pro
vided with an upstanding portion 83 and being v40
rockably mounted on the pin 84.
Through a bore in the rear portion of the
guard è@ extends the spring-pressed plunger 85,
bearing against the trigger 82 to añord the neces
sary spring action therefor.
Pivotally connected as at 86 at its rear end
to the upstanding portion 83 of the trigger plate
Si is the trigger bar 3l which is provided with
which are the longitudinally extendings slots
53-53. The plate 5l at the point where it
merges with the neck 52 has` a substantially V
shaped plate 5d secured thereto by a screw or like
a small U-shaped yoke 88 on the free end of
50 securing member 55, the same also serving as an one of its legs, denoted by numeral 89 while its 50
abutment for the outer end of the lip ¿it on the
other leg Si? is curved upwardly as at 9i to ter
magazine, and which lip rests upon the plate 5l. minate within the said yoke. This trigger bai`
The aforementioned iîngers ¿B9-i9 are as before
8l has suitable guide means and terminates at
stated, above the lip G3 but terminating inwardly its
free end within the path of the shoulder 2|
thereof while a spring 56 secured to the afore
55
mentioned rear magazine holder 3l extends rear
wardly for disposition over the cartridge-receiv
ing plate 5l. This plate 5@ is of spring material
and bifurcated from its rear end forwardly as
60
at 5l.
-
The furcations 58, thus formed have inner edge
portions cut away so as to provide a passageway
between the free end portions of the same, in
which a cartridge can be steadied and guided.
65 The cut-away furcations terminate at their outer
ends above the V-shaped «plate 5d. Attention is
directed at this time to the channeled ñanges 55%
which extend along the longitudinal edge por
tions of the plate 5l and the neck 52 thereof, the
70 ñanges extending forwardly of the plate 5i as at
59a, and serving as tracks- for the claw heads 25
on the arms ES-Zß, the claw heads 25 being cut
away as at 25a to receive said flanges 59 in the
manner apparent in Figure 6. Supported be~
75 neath the plate 5l is a rockable guide iìil which
on the sliding hook 20.
55
’
Projecting forwardly from the trigger plate 8l
is the neck portion 92 provided with a pair of
diverging ñngers SI5-già between which the pin
g5 on the rear end of the release bar 96 is dis
posed.
The intermediate portion of this release
bar S6 is enlarged as at El and provided with an
elongated slot es therein in which engages the
stud QS projecting through the pawl Ill@ which
has a hook-head mi thereon.
A lug m2 on the 65
enlarged intermediate portion Si of the bar 96
is engageable with the projection §33 on the pawl
lûû, while the hook-head lill on the pawl IDEE is
engageable with the lug it@ on the leg ‘lû of the
hammer 8€, as shown in Figure 2.
70
The release> bar 9@ is curved upwardly as at
iûi'a at its forward en-d and provided with a notch
iüâ in its upper end.
'
_
As clearly shown in Fig. 2, an adjustment is
provided for the trigger 82, whereby the same can 75
2,132,761
be set for single firing or automatic firing, or
head of the shell strikes the ejector board a. and
locked against firing at all.
The means generally referred to by numeral
is knocked outwardly through the slot in the
right side of the breech shell.
| |4 is employed for converting the gun from an
automatic to a semi-automatic, and a single shot
Referring to Figure 2, there can be seen the
cartridges in the chamber and the lock mecha- I
nism in position to fire the same. The trigger
rifle, and will not form part of the present dis-closure.
The magazine locking mechanism includes a
connecting rod |43 which is connected at its for
10 ward end pivotally to the cam detent 4|.
This
rod |43 is disposed through the guide opening |45
on the bottom of the intermediate guide or maga
zine holder Ill and through the guideway |48
on the holder 3|, backwardly of which the rod
15 |43 is constructed for threaded disposition
through the ears |48 on the intermediate portion
Ysof.. the Ueshaped .pusher |49,.which is provided
with rearwardly extending fingers |50 for en
gagement with the claw heads 25 of the arms
20 |9-20.
A coiled spring |5| is adapted for interposition
between the collar |52 on the rod |43 and a for
ward part of the holder 3|. Manifestly, when
the cam 4| is rotated, the rod |43 will be forced
25 rearwardly against the tension of the spring |5|
and when this cam 4| passes its center point, the
spring |5| will hold the rod in projected position
with the finger |50 forcing the claw heads 25 `out
wardly and rearwardly and partly holding the
This obviously
prevents firing of the rifle during the act of re
moving or replacing the magazine. The outward
_movement of the claw heads 25 prevent engage
30 block 8 in retracted position.
m/ent of the same with the cartridge head and
allows the magazine to be removed while contain
ing cartridges.
The function of feeding the cartridges from the
magazine to the firing chamber proceeds as fol
lows. Assuming that a cartridge has been fired
40 and the block is moving backwardly. The par
ticular claw 28 engaging a cartridge head in the
magazine pulls the cartridge by its head and in
so moving the cartridge will actually pivot or
wheel the same and cause it to ride under its
45 adjacent spring finger 58, while the other spring
finger is retaining the bullet end of the cartridge.
As the claw heads ride along the tracks 59, one
without engaging the cartridge and the other en
gaged with the cartridge head, the cartridge will
50
3
be wheeled around until it rides into the space
bar 8l is connected to the trigger plate 8| by its
pin 86 resting upon the boss |03 of the pawl |00,
with the shoulder 80 against the boss |03 and is
held firmly in this position through the spring
tension of the two legs 89-8I of the bar 81, as
the end of the leg 89 is held down at 88 through
contact with the shoulder 2| on the bar 20, safety
bar |01 is moved so that trigger enters notch |08.
When the trigger`82 is pulled rearward safety 15
bar |07 moves so that trigger enters notch |408
and bar 81 movesforward, the shoulder 80 forc---fY
ing the pawl |00 forward and disengaging the
part |0| from the boss |04 on the hammer 89.
Furthermore, when the yoke 88 has passed for 20
wardly of the shoulder 2|, the spring tension of
spring 81 is released, thereupon the shoulder 90
slips past the boss |03 and the pawl |00 is re
turned to its original position by a suitable spring.
The hammer 69 being released from the pawl |00 25
springs upward and strikes firing pin I5 driving
it forward and firing the cartridge in the cham
ber. The pressure from the powder explosion
forces the breech block 9 rearward against the
tension of spring I0. The block 8 forces the 30
hammer 69 back to its original position where it
is again held by the pawl |00. The block 9
moves rearward until stopped by striking the rear
of the breech shell and is then forced forward to
its original position by the spring l0. When 35
trigger 82 is released, the bar 81 moves rearward
and the yoke 88 is forced down by 2| and shoulder
80 engages against the boss |03, thus completing
the cycle. Each pull of trigger results in firing
one shot.
40
While the foregoing specification sets forth
the invention in speciñc terms, it is to be under
stood that numerous changes in the shape, size
and materials may be resorted to without de
parting from the spirit and scope of the inven 45
tion as claimed hereinafter.
Having thus described my invention, what I
claim as new is:
1. In Combination, a gun including a barrel,
a breech and a bolt in the breech; an elongated
between the free end portions of the fingers
58-58, When the cartridge reaches this posi
tion, both claw members 21 engage the cartridge
magazine attached to the barrel and extending 50
head on oposite side portions thereof and as the
versely therein, means for forcing the ammuni
tion in the magazine to the breech end thereof,
means at the breech for removing the ammuni 55
tion singly from the magazine and wheeling the
same into firing position in the breech, said
breech end of the magazine being provided with
ammunition retaining spring fingers, said means
for removing the ammunition including a claw 60
operative between the fingers of the magazine
to engage the ammunition, and a bifurcated
55 block continues to move rearwardly, the same
Will lift up the lower end of the swingable in
cline or guide 66, and the head of the cartridge
will engage into the notch 6| of the rotary guide
60 and between the flanges 62 thereof. In this
60 movement, the cartridge clears the swingable
guide 66 and when the block begins to move for
wardly, the pusher 29 on the block will force the
cartridge forwardly between the flanges 62 on
longitudinally thereof, said magazine being of
a width to receive ammunition disposed trans
the rockable guide 60 and up the incline 66 to
stop in the firing chamber ‘I of the barrel 5.
When the block reaches this point and is actu
spring member at the breech end of the maga
allyin closed position, the mechanism is ready
for theñring of the cartridge.
2. In combination, a gun including a barrel,
a breech and a bolt in the breech; an elongated
It can be seen that numeral 9’ represents the
70 movable detector arm having a fulcrum at 5', and
this bar is provided with a boss a. This boss
projects upwardly into a slot in the underside
of the breech block 8 and is clearly shown. The
empty shell is gripped by the two extractors b-c
and as the breech block moves rearwardly the
zine for alining the ammunition before it is
finally forced into firing position.
65
magazine attached to the barrel and extending
longitudinally thereof, said magazine being of 70
a width to receive ammunition disposed trans
verselyF therein, means for forcing the ammu
nition in the magazine to the breech end there
of, means at the breech for removing the am
munition singly from the magazine and Wheel 75
2,132,761
ing the same into firing position in the breech,
the breech end ofthe magazine being provided
with an arcuate cut out portion along thel edge
portion on which a piece of ammunition can ride
and Wheel as it is extracted from the magazine.
3. 1n combination, a gun including a barrel,
a breech and a bolt in the breech; an elongated
magazine attached to the barrel and extending
longitudinally thereof, said magazine being of
10 a width to receive ammunition disposed trans
versely therein, means for forcing the ammuni
tion in the magazine to the breech end thereof,
means at the breech for removing the ammuni
tion singly from the magazine and wheeling
15 the same into ñring position in the breech, the
5. In combination, a gun including a barrel,
a breech and a bolt in the breech; an elongated
magazine attached to the barrel and extending
longitudinally thereof, said magazine being of
a Width to receive ammunition disposed trans- .
Versely therein, means for forcing the ammuni
tion in the magazine to the breech end thereof,
means at the breech for removing the ammuni
tion singly from the magazine and wheeling the
same into iiring position in the breech, a swing
able guide at the breech adapted to assume an
inclined position to catch a piece of ammunition
when it has been Wheeled into position by the
last mentioned means, said guide being pro
vided With a spring for normally holding the
breech end of the magazine being provided With
anwarcuate cut out portion along the edge por
same in an inclined position.
tion of which a piece of ammunition can ride
and Wheel as it is extracted from the magazine,
a breech and a bolt in the breech; an elongated
said end of the magazine being longitudinally
slit and of spring material.
4. In combination, a gun including a barrel,
a breech and a bolt in the breech; an elongated
magazine attached to the barrel and extending
25 longitudinally thereof, said magazine being of
a width to receive ammunition disposed trans
versely therein, means for forcing the ammuni
tion in the magazine to the breach end thereof,
means at the breech for removing the ammuni
tion singly from the magazine and Wheeling the
same into firing position in the breech, and a
swingable guide at the breech adapted to assume
an inclined position to catch a piece of ammuni
tion when it has been wheeled into position by
ai the last mentioned means.
6. In combination, a gun including a barrel,
magazine attached to the barrel and extending
longitudinally thereof, said magazine being of a
f
width to receive- ammunition disposed trans
versely therein, means for forcing the ammuni
tion in the magazine to the breech end thereof,
means at the breech for removing the ammuni
tion singly from the magazine and Wheeling "25
the same into ñring position in the breech, a
swingable guide at the breech adapted to assume
an inclined position to catch a piece of ammuni
tion when it has been Wheeled into position by
the last mentioned means, and a rockable mem
30
ber in the breech responsive to the action of the
bolt for elevating the ammunition to a position
so that the nose thereof can rise on the guide
when the bolt is moved to locked position.
ROY CLIFTON ROBERTSON.
35
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