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Патент USA US3054216

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Sept. 18, 1962
E. J. RALEIGH
MEANS FOR RETAINING MAGAZINE-FED FIREARM
CARTRIDGES ‘IN BOLT PICKUP POSITION
Filed Jan. 15, 1961
IN VEN TOR
EdmnndIRn'lei h
j}. Way-ma ¢ Q-JQWML
United States Patent O?lice
3,054,206
Patented Sept. 18, 1962
1
2
MEANS FOR RETAINING MAGAZINE-FED FRE
3,054,206
zine 20 are forced by a spring 26 therein towards neck
24 as the leading cartridge therein is removed by bolt 14.
Provided in receiver 12 is a chamber section 32 of
' ARM CARTRIDGES IN BOLT PICKUP PQSTTION
rectangular cross-section, which extends rearwardly into
Edmond J. Raleigh, ‘West Spring?eld, Mass., assignor to
the United States of America as represented by the
Secretary of the Army
Filed Jan. 13, 1961, Ser. No. 82,660
4 Claims. (Cl. 42-18)
(Granted under Title 35, US. Code (1952), see. 266)
receiver 12 from the rear end of well 18 and which is
open at the top to channel 16. Chamber section 32 is
terminated at the rear end by a wall 34 which extends
vertically upward to channel 16. A bore 36 extends
longitudinally rearward from wall 34 to a bottom 37
10 and receives a compressible coil spring 38 for contact
The invention described herein may be manufactured
therewith.
A buffer-retainer 40 includes a cylindrical shaft 42,
‘and used by or for the Government for governmental
which is slidingly received by bore 36 forwardly of
purposes without the payment of any royalty thereon.
spring 38, and an integral plate 44 laterally disposed on
This invention relates to magazine fed ?rearms with
reciprocating bolts and more particularly to devices for 15 the front end of the shaft. Plate 44 has a rectangular
supporting the top cartridges in a magazine so as to assure
cross-section of approximately the same dimensions as
those of chamber section 32 so that the plate is slidingly
positive pickup by the bolt and to bu?er devices for
resiliently stopping the bolt in the recoil position thereof
and energizing the bolt for counterrecoil ?ight.
received thereby. The top of plate 44 extends upwardly
the recoil to the battery position, a non?ring condition
ward displacement of buffer-retainer 44) is limited by the
into channel 16 and is provided with an arcuate, mating
With those ?rearms which ?re at a rapid rate and 20 relief 45 for bolt 14.
The free end of shaft 42 contacts the front end of
have a reciprocating bolt which transfers a cartridge from
spring 3% to bias buffer-retainer 4t} forwardly. The for
a magazine to the barrel chamber when traveling from
contact of a stop 46 extending radially from shaft 42
oftentimes develops through the leading cartridge in the
magazine being below the path of travel of the bolt when 25 with the front end of a slot 48 extending upwardly from
bore 36 to channel 16. The rearward displacement of
passing thereby. This condition is caused by the surge
produced in the magazine spring, as it functions to move
buffer-retainer 413 is limited by the contact of plate 44
the cartridges in the magazine upwardly therein when the
leading cartridges are successively removed by the bolt,
with wall 34.
Extending forwardly from plate 44 is a pair of laterally
and the rapid rate of ?re which does not permit time 30 spaced tines 5'0 which, when buffer-retainer 40 is rear
wardly displaced, are retracted within chamber section
for the surging to subside in the spring between the cyclic
32. When buffer-retainer 4-0 is forwardly displaced,
functions thereof.
tines 5d extend through an opening 51 in the rear side
It is, therefore, an object of this invention to provide
of magazine 2i) for engagement with the underside of
a retainer device which supports the leading cartridge
in a magazine to assure pickup by the bolt.
35 the base of cartridge 22 in neck 24. Tines 50 are spaced
apart a distance slightly less than the diameter of the
It is another object of this invention to provide such
base of cartridge 22 and are vertically positioned so as
a retainer device which is actuated by the bolt.
to be insertable into the clearances on opposite sides of
It is a further object of this invention to provide such
the area of contact between the leading cartridge in
a retainer device which also serves as a buffer for the bolt.
The speci?c nature of the invention as well as other 40 neck 24 and the next succeeding cartridge when the
objects and advantages thereof will clearly appear from
leading cartridge is positioned for pickup by bolt 14.
By tines 5% being so spaced apart the succeeding car
tridge 22 in magazine 24} is displaceable a portion of
the pitch of movement of the cartridges in neck 24 when
FIG. 1 is a longitudinally cross-sectioned view of a
?rearm receiver showing the bolt disposed between the 45 the leading cartridge is removed therefrom. Whereby,
such succeeding cartridge 22, now the leading cartridge,
battery and recoil position thereof and the leading car
has to be displaced only slightly more than a half-pitch
tridge in the magazine engaged with the underside of the
when released, as hereinafter described, by butter
retainer;
retainer 40 to the position in neck 24 for pickup by
FIG. 2 is a fragmentary view similar to FIG. 1 but
showing the bolt stopped in the recoil position by the 50 bolt 14.
Provided on the front portion of each of the tines 50
buffer-retainer and the leading cartridge in the magazine
is a spiral ramp 52 which extends rearwardly and up
released by the retainer for displacement to the position
a description of a preferred embodiment as shown in the
accompanying drawing in which:
for pickup by the bolt;
wardly from the front end thereof. Ramps 52 assure the
engagement of the base of the leading cartridge 22 in
buffer-retainer forwardly displaced to extend the forward 55 neck 24 by tines 50 when buffer-retainer 40 is forwardly
end thereof into engagement with the pickup position
displaced. Tines 50 are disposed so that, when extended
FIG. 3 is a view similar to FIG. 2 but showing the
cartridge for support thereof and the bolt energized for
under the base of the leading cartridge 22, the base is
counterrecoil ?ight;
raised so as to project upwardly into the path of bolt
14 to assure engagement thereby during displacement
FIG. 4 is a view taken along line 4—'4 of FIG. 3; and
FIG. 5 is an enlarged view of the butter-retainer.
60 from the recoil position.
Buffer-retainer 40 is actuated rearwardly, against the
Shown in the ?gures is a ?rearm receiver 12 in which
a cylindrical bolt 14 is slidingly received by a channel
bias of spring 38, by the contact of a radial ?ange 56
on bolt 14 with the front side of plate 44 during the
16 for longitudinal reciprocation in recoil and counter
recoil strokes to and from a recoil position. Receiver
recoil strokes of bolt 14. Flange 56 is disposed adja
12 is provided with a vertically disposed well 18 which 65 cent the front end of bolt 14 so that tines 50 extend
forwardly therebcyond when the ?ange and plate '44 are
extends therethrough to channel 16 and which is adapted
to receive a cartridge magazine 20. Magazine 20 is of
in contact. The contact of ?ange 56 with plate 44 dur
double-stacked type wherein a plurality of stored car
ing recoil travel of bolt 14, which displaces bu?er-retainer
tridges 22 are moved alternately and in contact relation
4t) rearwardly against the bias of spring 38, releases car
ship from the two stacks to a central neck 24 for suc 70 tridge 22 engaged with the underside of tines 50. When
cessive removal by bolt 14 during the counterrecoil
released, such cartridge 22 is moved under the bias of
strokes thereof. The remaining cartridges 22 in maga
spring 26 into pickup position in neck 24. Moreover,
3,054,206
3
through the engagement of buffer-retainer 40 by bolt 14,
the energy therein is partially absorbed by spring 38,
before being stopped in recoil position by the contact
of plate 44 with wall 34, to provide a buffer for the
bolt. The stored energy in spring 38 energizes bolt 14
for the succeeding counterrecoil stroke thereof.
Thus, when bolt 14 is in battery, the rear end of the
4
as to resiliently stop said bolt in the recoil position and
energize said bolt for ?ight therefrom.
2. In a ?rearm, the combination including a receiver,
a bolt disposed in the receiver so as to be energized for
longitudinal reciprocation to and from a recoil position,
a magazine arranged for moving cartridges therein succes
sively and in contact relationship to a neck of said maga
leading cartridge 22 in magazine 20 is in engagement
zine in position for pickup by said bolt during displace
sive to discharge forces. \Vhen bolt 14- is adjacent recoil
position during the recoil stroke thereof, ?ange 56 con
tacts plate 44 to provide a buffer for the bolt and retract
tines 50 within chamber section 32 for release of the
tridges for retention thereof in position for pickup by said
bolt during displacement from the recoil position and
ment thereof from the recoil position, a bulfer-retainer
with the undersides of tines 50 so as to project radially
upward therebetween but so as to be clear of ?ange 56, 10 device mounted for longitudinal reciprocation in the re
ceiver adjacent said magazine, said buffer device including
as shown in FIG. 1, when the bolt travels in recoil respon
engaged cartridge 22.
retainer means engageable with the pickup position car
spring means disposed for biasing said retainer means into
engagement with the pickup position cartridges, and a
?ange disposed on said bolt for engagement with said buf
fer-retainer device during displacement of said bolt to the
The released cartridge 22 is immediately biased up
wardly into pickup position in neck 24 and the contact
recoil position for actuating said retainer means so as to
of plate 44 with wall 34 stops bolt 14 in the recoil posi
tion thereof. Spring 26 must have sufficient resiliency 20 be displaceable into engagement with the pickup position
cartridges and for transferring recoil energy from said bolt
and the reciprocation of bulfer-retainer 40 with bolt 14
must be su?icient to assure that the released cartridge 22
will reach pickup position in neck 24 by the time that the
front end of tines 50 are positioned, during counter
recoil of the bolt, for engagement with the underside of
such cartridge. The ramps 52 on the front ends of
tines 50 assure extension thereof beneath the leading
to said spring means to resiliently stop said bolt at the re
coil position and energize said bolt for ?ight therefrom.
3. The combination as de?ned in claim 2 wherein said
cartridge 22. Therefore, the leading cartridge 22 is
positively positioned by tines 50 so that, when stop 46
retainer means includes a pair of tines laterally disposed
so as to be engageable with the pickup position cartridges
on opposite sides of an area of contact of the pickup posi
tion cartridge with a succeeding cartridge in said maga
zine and so as to permit limited radial displacement of the
contacts the front end of slot 48 to stop the forward
displacement of buffer-retainer 4t} and bolt 14 continues
in counterrecoil relative thereto, the base of such car
4. The combination as de?ned in claim 2 wherein the
succeeding cartridge therebetween when the pickup posi
tion cartridge is removed from said magazine by said bolt.
receiver is provided with a vertical well for receiving said
tridge is isolated by tines 5t? from the in?uence of spring
magazine, a chamber section extending rearwardly from
26 and supported for positive contact by the front end
of the bolt. When the leading cartridge 22 in magazine 35 the top of said well to a vertically disposed wall and a bore
extending longitudinally rearward therefrom; wherein said
20 is transferred therefrom by bolt 14, the succeeding
buffer-retainer device includes a shaft slidingly disposed in
cartridge in the magazine is pressed upwardly by spring
said bore, an integral plate laterally disposed on the front
26 into engagement with the undersides of tines 50.
end of said shaft so as to be slidingly received by said
From the foregoing it is clearly apparent that there is
chamber section and be contactable with said wall to stop
provided herein a device which serves the dual purpose
rearward displacement of said buifer-retainer device and
of retaining a cartridge in a magazine in position for
means for stopping the forward displacement thereof to
positive contact by a reciprocating bolt and of bu??ng
limit the longitudinal reciprocation of said buffer-retainer
the recoil strokes thereof, which buffer-retainer device is
device; wherein said retaining means includes a pair of
simple and rugged in construction and positive in its
tines extending integrally forward from said plate so that
functions.
45 when the forward displacement of said buffer-retainer is
Although a particular embodiment of the invention
stopped by said stopping means said tines extend into said
has been described in detail herein, it is evident that many
magazine for engagement with the pickup position car
variations may be devised within the spirit and scope
tridge to support the cartridge for contact by said bolt dur
thereof and the following claims are intended to include
ing displacement from the recoil position and so that when
50 said plate is in contact with said wall said tines are re
such variations.
I claim:
tracted from said magazine into said chamber section;
1. In a ?rearm, the combination including a receiver,
wherein said spring means is disposed in said bore rear
a bolt disposed in the receiver for longitudinal reciproca
tion to and from a recoil position, a magazine arranged
wardly of said shaft for biasing said buffer-retainer device
for moving cartridges successively from a stored supply
therein to a neck of said magazine and in position for pick
up by said bolt during displacement thereof from the re
on said bolt adjacent the front end thereof so that when
said ?ange and said plate are in contact said tines extend
coil position, and a device disposed in the receiver so as to
forwardly; and wherein said ?ange is integrally disposed
forwardly beyond said bolt to engage the pickup position
cartridge before contact thereof by said bolt during ?ight
thereof from the recoil position.
be engageable with the pickup position cartridges for re
60
tention thereof in position for pickup by said bolt and so
No references cited.
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