F29CA_M3A1_Grease_Gun_Patents.pdf

(1653 KB) Pobierz
July 2, 1946-
FIREARM CONSTRUCTION
F.
Filed May 1, 1944
2 Sheets-Sheet l
SAMPSON EI'AL I
2,403,306‘
'
I
m»
.N.
i
WU.
F
W
5H2
3%
m?cw.
July 2, 1946.
‘F. w. sAMPsoN ETAL
2,403,306. '
FIREARM CONSTRUCTION
Filed May 1, 1944
2 Sheets-Sheet 2
I
.il
rYILUVVIWVIIIWJWVIMVV,IWWIUIJ
|Jmmmmmmmmmmmmmmmmmmmmmmmms“|m||y||||||||||||||||
,sz'‘.k>.-
w
.|
FREDERIEKWSAMPSDN
EEEIR'EE'EJ.HYDE,
7
33”’ aa/MUMM f I
Patented July 2, 1946
' 2,403,306.
0
UNITED STATES PATENT oFFici:
FIREARM CONSTRUCTION
Frederick W. Sampson, Dayton, Ohio, and George
J. Hyde, Brooklyn, N. Y., asslgnors/to General
Motors Corporation, a corporation of Dela
ware
‘Application May 1, 1944, Serial No. 533,569
5 Claims.
(01. 42-3)
This invention relates to an improved bolt
guiding construction for a ?rearm of the type
commonly referred to as a submachine gun or
machine pistol.
‘
2
spaced parallel bolt guide rods l5 are ?xed in" the.
guide rod retaining plate I8. Surrounding the
guide rods and con?ned thereon between the re“
duction a minimum of machine work without
sacri?cing in accuracy and reliability of func- -
guide holes l4 and pass through holes in the
guide rod locating plate l8 which engages for
exposure to dust, mud, or other foreign elements.
wardly facing shoulders i5a on each of the guide
It is a further object of this invention to pro
10
rods. Grooves I9 inthe ends or each of the guide
duce a bolt mechanism assembly for a ?rearm
rods-forward of the locating plate are engaged
which may be removed as a unit from the ?re-'
by a guide rod retaining clip 20, shown clearly in
arm for inspection and cleaning without danger
Figs. 3 and 6.
'
. '
.
of loss or displacement of springs or other parts.
When
An additional object is the provision of a bolt
15
into the
the bolt mechanism assembly is inserted
front end of the receiver lateral projec
guiding construction which requires in its pro
tions or locating lugs 2! on the locating plate It
one which is not liable to stoppages as a result of
It is the principal object of this invention to
produce a ?rearm in which the bolt is guided in
its reciprocation with accuracy and certainty and
taining plate It and rearwardly facing surfaces
Ma on the bolt are a pair of drivingsprings IT.
The guide rods extend forwardly through they-bolt
tioning.
Fig. 1;
When the barrel bushing '6 is
screwed into‘ the receiver in front of the bolt
assembly the rear face’ of the bushing engages the
front face of the guide rod locating plate and
hereto in which:
‘
.forces the plate, guide rods, and retaining plate
Fig. l is a longitudinal vertical sectional view
25
back into tight engagement with the rear wall
through a ?rearm embodying this invention;
of the receiver. The rear end of the barrel 5
Figs. 2, 3 and 4 are cross sectional views on the
extends through the central aperture I 8a in the
lines 2-2, 3-3 and 6-4, respectively, of Fig. 1;
locating plate in position to receive in the cham
Fig. 5 is a longitudinal, sectional view taken
ber 5a cartridges fed from the magazine 33. It
substantially along the plane of the line 5-—5 of
30
will be noted that when the parts are secured.
other objects and advantages thereof will be
clearly apparent from a study of the following
speci?cation referring to the drawings annexed
-
The exact nature of our invention as well as
20
of the receiver.
are engaged in grooves 22 in the barrel sleeve 4
and the rear ends of the guide rods l5= are re-‘
ceived in the holes 23 formed in the rear wall
Fig. 6 is a pictorial view of the bolt mechanism
assembly removed from the receiver.
Referring to the drawings by characters of ref
which the subject matter disclosed but not.
40
ceiver as a. unit and which normally need not
claimed in this application is claimed, and com-k
be further disassembled for cleaning or inspec-_
prises a receiver I to which a barrel sleeve 4 has
tion. When occasion does arise calling for fur
been welded or otherwise secured. A barrel 6 is
ther disassembly or replacement of parts the re
threadedly engaged with the barrel sleeve 4
taining clip may be readily removed and the
through the medium of the externally threaded
45
locating plate and bolt allowed to slip 011 of the
barrel bushing 8.
,
erence it will be seen that» the ?rearm shown
35
for the clip to become loosened. or deranged. -
therein is of the same general type as that shown
‘It will be readily apparent that by this means
in our copending applications for U. S. Letters
the entire bolt and bolt guiding‘ mechanism has
Patent, bearing Serial Nos. 533,566; 533,567;
been integrated into a compact and convenient
533,568; and 533,570, ?led May 1, 1944, and in
subassembly which may be removed from the re
in this manner the ends of the guide rods and"
the retaining clip are engaged in'an annular
space de?ned by the barrel bushing, the barrel
and the locating plate, and that it is impossible
Althoughno detailed description of the lower
housing has been includedin this application it is
prises a breech bolt i0 formed with an integral
?ring pin II and provided with a spring extrac
50
believed that it will be evident that the lower
housing 44 carrying the ejector I2 and cooking
tor ?nger l2 received in a longitudinal bore in ‘a
mechanism 55 must be removed before removal
the bolt and retained therein by a transverse pin '
of the bolt mechanism can be e?’ectuated. Re
it. A pair of spaced holes H penetrate the bolt
moval of ‘the lower housing 'is simply achieved
longitudinally and are each in substantially par
by deforming the resilient trigger guard 49 out
allel relation to-the axis of :the bolt. A pair of
of engagement with the-holein the grip and with
assembly, shown separately in Fig. 6, which com
1
r
The receiver. serves as a housing for the bolt
guide rods.
.
'
2,403,806
3
.
drawing the arched end of the guard from the
matching holes 41 and 48, respectively, in the
housing and receiver. These features are fully
described in our copending application above re
ferred to.
central aperture, and a barrel bushing on the
barrel engaged with the receiver and with the
forward face of the locating plate.
3. A ?rearm comprising a receiver, a bolt guide
assembly in the receiver having a pair of elon
It will be noted that the guide,rods furnish
locating plate engaging the receiver and having
complete support and control of the movement of
holes through which the guide rods may pass,
the bolt independently of the walls of the receiver
opposed grooves in the guide rods, a spring clip
during all phasesof bolt travel. This permits the
exerting resilient outward pressure on the guide
receiver to be formed by stamping or other pro
10
rods and engaged in the grooves whereby the
duction methods and without necessitating close
plate is secured on the rods, and a barrel assem
tolerances and di?icult machining operations on
gly having a portion passing through the cen
the inner wall of the receiver.. At thesame time
tral aperture in the locating plate whereby the
the bolt is guided with a, high degree of accuracy,
spring clip is prevented from dislodgment.
smoother operation is attained, and uniformity
15
4. For use in a ?rearm a bolt mechanism com
of drive spring loading is readily achieved.
prising, a plurality of substantially parallel guide
This sort of construction presents a minimum
rods having annular grooves adjacent to their
of operating and maintenance problems under
forward ends, a retaining plate attached to the
gated parallel guide rods, a centrally apertured
di?icult service conditions since the contacting
rear ends of said guide rods, a bolt including
area between the bolt and its guiding means is
20 means forming a plurality of longitudinally ex
greatly reduced as compared to conventional con
tending holes therein in which said guide rods
structions and the bearing area is situated in a
are slidably received, driving springs surrounding
well protected position. The spacing which is
said rods and operatively engaged for compres
maintained between the bolt and the wall of the
receiver insures that if foreign material should
25
sion between said plate and said bolt, a locating
member including a plurality of outwardly ex
get into the receiver it may not readily jam the
tending locating lugs thereon and a plurality of
mechanism by wedging in a restricted space.
apertures therein receiving the forward ends of
We claim:
said rods, and a resilient retaining clip engaging
1. A ?rearm comprising a receiver having a
substantially closed rear end, locating holes in
30
said grooves forward of said member.
5. For use in a ?rearm a bolt mechanism com
the rear end, bolt guide rods received in the lo
prising, a plurality of guide rods having locking
cating holes, a bolt-slidably mounted on the rods
means adjacent their front ends, a retaining plate
and within the receiver, grooves in the inner sur
attached to the rear ends of said rods, a bolt in
face of the forward end of the receiver, a locating
plate having means engaging the grooves and
85
cluding means forming a plurality of longitudi
nally extending holes therein in which said rods
the guide rods, and a barrel bushing engaging
are slidably received, driving springs surrounding
the receiver and con?ning the locating plate and
said rods between said plate and said bolt, a lo
the guiderods.
cating member in engagement with the forward
2. A ?rearm comprising a receiver, bolt guide
40
ends of said rods, and resilient means engaged
rods in the receiver, a bolt slidable on the rods, a
with said locking means for releasably retaining
centrally apertured guide rod locating plate on
said rods and said member in engagement.
the forward end of the rods and engaging the
FREDERICK W. SAIWPSON.
receiver, spring clip means on the rods to secure
GEORGE J. HYDE.
the plate thereto, a barrel passing through the
Jan- 30, 1951
Original Filed May 1, 1944
F. w. SAMPSON ETAL
TRIGGER AND ‘SEAR MECHANISM
‘ 2,539,554
2 Sheéts-Sheet 1
1
/
‘
Fi§,_l_
O o o
4
o
6
I VENTOES
/v
FREDERICK VVLEAMFIEUN,
EEDR'EE-J_HYDE)
ATToEA/E rs

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin