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Патент USA US2404555

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»MY 23, wíë.
D. M. WILLIAMS
2,404,555
BOLT-ACTION FIREARM
Filed~ June 24, 1944
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23,' 1946.
2,404555
D. M. WILLIAMS
BOLTTACTION FIREARM
Filed'June 24;- 1944
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D. M. WILLIAMS
294,555
BOLT-ACTION FIREARM
Filed June 24, 1944
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2,404,555
Patentecl `Íuly 23, 1946
UNITED sTATEs PATENT oEElcE
BOLT-ACTION FIREARM
David M. Williams, New Haven, YConn., assìg‘nor to
Olin Industries, Inc., a corporation of Dela
Ware
Application June 24, 1944, Serial No. 541,904
4 claims. (c1. «i2-110)'
1
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inthe positions which they `assumeimmediately
The present invention relates to improvements
in ñrearms and relates more particularly to im
provements in bolt-action iirearms of the type
following. the discharge of the ñrearm;
_
_ Y
Fig. 3 is a view similar to Fig. 2 but showing
the- Yhammer in its cocked position, the breech
Ibolt in a position _slightly rearwardly of its
breech-clocing position, and the ¿firing-plunger
wherein a breech-bolt has -both longitudinal re
ciprocating movement and transverse turning
movement.
In firearms of the type above referred to, it is
essential that the firing-plunger be retracted
with reference to the cartridge-seat in the for
ward face of the breech bolt, in order to avoid
having such ñring-plunger engage' with the
in
primer of a fresh cartridge as the latter is forced
the line 5-5 of Fig. 3 and, hence, showing the
into the cartridge-chamber of the firearm by the
breech-closing movement of the breech-bolt.
As will be apparent from the following, the pres
breech-bolt- in its unlocked position;
6 _is fa top or plan view of the unit ,com
prisi'ng- the breech-bolt, firing-plunger and ex
ent invention involves a construction and ar
tractor;
rangement of parts whereby the retraction >of
the firing-plunger referred to may be assured.
One of the objects of the present invention is
to provide a bolt-action ñrearm of the type re
ferred to, wherein superior means is provided for
its
retracted
position;
K
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._Fig. 4 is a transverse sectional View taken on
the line 4-7-4 of Fig.V 2 and, therefore, showing
the Ábreech-bolt in its breech-closing position;
Fig. 5 is a view similar to Fig. 4 but taken'on
n
A
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' Fig. `'7V is a View looking toward the left side
thereofy"
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¿Figi 8 is a transverse sectional view on an en
20 larged scale, `taken 'on the-line 8_8. of Fig. '7;
Fig. 9 is a transverse sectional View taken on
retracting a reciprocating firing-plunger with
respect to a breech-bolt, to guard against having
such ñring-plunger available for engagement
the'line 9-9 of Fig. 6 and showing the guide
h'ead of the firing-plunger in alignment lwith the
adjacent locking-lug of the breech-bolt;
with the primer of a cartridge until the cartridge
is substantially fully seated Vin the cartridge
chamber of the iirearm and until the breech-bolt
is locked.
the- firing-plunger turned to bring its guide-head
out'of alignment with the adjacent locking-lug
` Fig. _10 is a view similar to Fig.`9 but showing
ofv the
=breech-bolt§
_
I _
`
Another object of the present _invention is to
Fig. -11 is a view-of the Vbreech-bolt andïasso
provide a superior construction and arrangement 30 ciatedelements partly in plan and partly in een
of parts of the general character set forth above
tral-longitudinal sectionY on` the line Il-II of
and further characterized by economy and sim
Fie- 'li
~
Fig. 12His a _broken topor plan view of the Yfor
wardportion
of the receiver;
provide a bolt-action ñrearm with superior re 35 -‘1ï{ig.¿13V isa view thereof vin vertical central
tracting-means for the firing-plunger so con
`longitudinal section'v taken on the line l3-l3
plicity of manufacture.
«
'
A further object of the present invention is to
structed and arranged as to avoid interference
with a hammer and to enable the said hammer to
strike a solid blow upon the firing-plunger.
With the above and other objects in view, as 40
will appear to those skilled in the art from the
present disclosure, this invention includes all
theV prior
art.
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In the accompanying drawings,- in which cer
tain modes of carrying out the present'inven
tion are shown for illustrative purposes:
12;
a
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jFig.-14 is aviewrin front-end elevation of the
iiring-pluuger,` detached;
and
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Y
» Fig. 15 is atop or` plan (View thereof.V
f; _Tha particular bolt-.action ñrearm herein
chçsenfor illustration t9 make clear one embodi
_ment fof the presentinvention; is 'of the gas-oper
features in the said disclosure which are novel
over
of'Fig.
45 atedself-loading typathough the present inven- _
tion is applicable _to manually-operable andother "
`
Fig. 1 is a broken View of the centralV portion
firearms :wherein an oscilla-ting-and-reciprocat
_ingIbrèech-_bolt'is employedin conjunction with
apri-n' g-plunger.
_
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1
'f
"'
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of a gas-operated self-loading ñrearm embody
The bolt-action ñrearm'shown in the'accom
ing the present invention, viewing ïthe same from 50 'F ’pan'ying>
drawings _includes _ among its `main vele
the right side, partly in side elevation andy partly
ments a receiver I5; la barrel I6, a trigger-plate
in vertical central-longitudinal section;
Y
'unitv l'IQfan action-slide I8,.a stock lßfand `a re
Fig. 2 is a similar View but viewing the struc
Y»_ciprocating-and-oscillating breech-’bolt . 20j whichr
ture from the left side and showing a-portion of
the receiver broken away, 'the parts being shown _
:1an-ir www@_emancipation of
2,404,555
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a bolt-receiving chamber 2| formed in the inte
and has its forward portion narrowed as at 44, to
rior of the receiver I5.
Adjacent its rear end, the barrel I6 is formed
leave an opening through which cartridges may
be ejected, as is especially well shown in Fig. 12.
The narrow portion 44 of the top-wall 46 ter
minates short of the forward portion of the re
with an integral depending cylinder-lug 22 hav
ing a rearwardly-opening piston-chamber 23
therein. The said piston-chamber is arranged
with its longitudinal axis extending in substan
tial parallelism with the bore 24 of the barrel I6.
Leading forwardly and upwardly from the rear
face of the front wall of the said piston-chamber 10
23 to the bore 24 of the barrel I6, is an inclined
gas-passage 25 serving to conduct gas under
pressure from the said bore to the piston-cham
ber 23 for the actuation of a piston in a manner
as will hereinafter appear.
ceiver and provides a forwardly-facing locking
abutment 45. The forward portion of the right
side-wall‘M of the receiver is notched to provide
a forwardly-facing locking-abutment 46 which
serves in conjunction with the locking-abutment
45, to hold the breech-bolt in its breech-closing
position in a manner as will hereinafter appear.
In its left side-wall 43 and below the locking
abutrnent 45, the receiver I5 is formed on its in
15 ner face with a longitudinal guideway in the form
of a guide-groove 41 located substantially-dia
Mounted for reciprocation in the piston-cham
ber 23 of the cylinder-lug 22 is the relatively
metrically-opposite the clearance-passage 42 be
large-diametered forward-portion 26 of a piston
tween the upper edge of the right side-wall 4I and
generally designated by the reference character
the right edge of the top-wall 40, before de
21. In addition to its forward-portion 26, the said 20 scribed.
piston 21 includes a rearwardly-projecting 'stem
The breech-bolt 20 is >forined on its ‘right side
28 resulting in the formation on the piston of a
conically - contoured
rearwardly - facing
adjacent its forward end with the integral 'com
stop
bined operating-and-lockihg lug 31 which is
shoulder 29. The stem 28 extends through and
adapted, in a manner as will hereinafter appear,
rearwardly beyond a ring-like stop-member 36 25 to reciprocate in the clearance-passage 42 in the
threaded cr otherwise mounted within the
receiver I5, and to have its rear edge engaged
threaded rear-portion of the piston-chamber 23
with and disengaged from `the _locking-abutment
and formed with a conically-contoured forward
46. 'I‘he extreme outer pór'tion of the combined
ly-facing seat 3| adapted to be engaged by the
operating-and-locking lug 31 is entered intò the
similarly-contoured stop-shoulder 29 of the pis 30 cam-recess 36 in the rear-head 33 òf the action
ton 21.
slide I8, so as to operatively couple the said ac
The rear face of the stem 28 of the piston 21 is
normally engaged by the forward face of a front
tion-slide to the br'eenzih-bolt.v
At a point substantially diametrically opposite
head 32 constituting an integral feature of the
action-slide I8 before referred to. The said ac
tion-slide also includes a rear-head 33 which is
the operating-and-locking lug 31, the forward
portion of the breech-bolt 2'0 is 'formed with a
guided foi` reciprocation adjacent the right side
locking-lug 48 which‘i's adapted to be engaged
with and disengaged fromA the locking-abutment
45 and to reciprocate inthe guide-groove 41 in
of the receiver I5. The front-head 32 and the
rear-head 33 of the action-slide I8 are integrally
the left side-wall 43 ofthe 'receiver I5.
connected by a side-bar 34 extending in substan 40
As is shown especially well in Fig. 151., the
tial parallelism with the longitudinal axis of the
breech-bolt 20 is formed with a central-longitudi
firearm-structure, as is especially well shown in
nal passage 49 in which reciprocates and oscil
Fig. 1. The rear-head 33 is formed with a later
lates a firing-»plunger 50. The passage 49 just
ally-projecting operating-handle 35 by means of
referred to extends from end to end through the
which the ñrearm may be manually operated.
breech-bolt |26 and is enlarged adjacent its rear
In its inner or left face, the rear-head 33 of the
end to provide a rearwardly-facing spring-seat
action-slide I3 is formed with a cam-recess 3S
5I against which is seated the forward end of a
into which fits the outer portion of a `combined
helical retracting-spring 52 encircling the adja
operating-and-locking lug 31 laterally oifsettingeì'; cent portion of the firing-plunger 50. The oppo
from the forward end of the breech-bolt 20. The 50 site or rear end of Y the retracting-spring 52
coaction of the lug 31 and the surfaces of the
seats against a head 53 formed at the rear of the
cam-recess 36 serve to operatively interconnect
firing-plunger 5i) and provided with> a helical
the action-slide I 8 and the breech-bolt 23 in a
groove 54, by means of which the retracting
manner broadly similar to the connection ern-¿15i spring 52 may be threadedinto _a position for
ployed in the well-known Garand military riñe.
wardly of the- said head 53. The retracting
The action-slide I3 (and hence, also, the breech
spring 52 is accommodated in the enlarged rear
bolt 26) is yieldingly urged forwardly by a helical
Iportion of the passageg49 in the breech-bolt 20
breech-closing spring 38 encircling and thrusting
and serves to yieldingly urge the said firing
forwardly upon a breech-closing plunger 39 hav
plunger rearwardly to Withdraw the firing-point
ing its forward end seated against the front-head . 55 at the forward end thereof, into a position
32 of the action-slide I8, as is shown in Fig. 1.
wherein it will not engage the Vprimer 0f a car
Normally, the breech-closing spring 38, acting
through the breech-closing ,plunger 39, maintains
tridge and also to project the rear end of the
the forward face of the vfront-head 32 of the ac-`
tion-slide I8 in engagement with the-rear face i
of the stem 28 of the piston 21 and, in turn, serves
to maintain the forward end of the said piston
against the front-wall of the piston-chamber 23,
as is shown in Fig. 1.
The receiver I5 includes a top-wall49 which is
separated from the right side-wall 4I of the said
receiver by a longitudinal clearance-passage 42,
for purposes as will hereinafter appear.> The said
said firing-plunger beyond the rear Vend of the
breech-bolt
20.
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_
As is especiallywell shown in Fig. 7, the >breech
bolt is formed _in its left side with a longitudinal
clearance-slot 56extending from its rear face to
a point adjacent the rear face of the locking-lug
48. The wall portion of the breech-bolt 20 ad
jacent the forward end of the clearance-slot 56 is
cut away to DIÍQVíde a _,-circurnferentially-ex
tending clearance-notch 51l~intersecting the for
ward portion of the clearance-slot 56 and like the
top-wall V4£I constitutes, in effect, an integral >ex
„latter adapted'to receive a lplate-like guide-stem
tension of the left side-wall 43 of the receiver I5, 75 58 formed integral with' and projecting Vlaterally
2,404,555
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from the firing- plunger 56. The said guide-stem
hammer is ,releasably maintained in a cocked
position as shown in Fig. 3V by means of a sear
56 is formed at its outer end with a guide-head 59
68, and the upper portion of the said hammer
dimensioned to freely slide in the guide-groove 4l
is urged to swing forwardly by a suitable ham
in the left side-wall 43 of the receiver l5.
f
.
The rear edge of the guide-stem 58 of the fir 5 mer-spring 69.
Normally, the retracting-spring 52 serves to
ing-plunger 56 is adapted to engage with a for
maintain the firing-plunger 50 in its retired po
wardly-facing stop-abutment 66 formed in the
sition in which its firing-point 55 is retired rear
breech-bolt 26 and constituting the rear wall of
wardly of a cartridge such as 16, shown in Figs.
the clearance-notch 51 therein. At the junction
of the respective forward walls of the clearance 10 2 and 3. The said retracting-spring 52 also serves
to normally hold the rear end of the ñring-plung
slot 56 and the clearance-notch 51, the breech
bolt 26 is formed with a cam-like retracting-sur
er 56 extended beyond the rearendof the'breech
face 6I which is adapted to engage with the for
bolt 28 into position to be struck and driven for
ward-surface of the plate-like guide-stem 58 to
wardly by the hammer 66.
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eiïect the forcible retraction of the firing-plunger 15
For purposes of making clear the operation
in the event of any failure of the retracting
of the above-described firearm, let it be assumed
spring 52, all in a manner as will more fully here- ‘
that the hammer 66 is cocked and that the ñringn
inafter appear.
plunger is retracted as shown in Fig. 3. Let it
The relatively-slender forward portion of the
further be assumed that-the breech-bolt 26isVv
firing-plunger 56 immediately to the rear of its 20 moved forwardly from the slightly-retired posi
firing-point 55, is cut away to provide two diverg
tion shown `in Fig. 3 into its full breech-closing`
ing surfaces 62 and 63 (Figs. 9 and l0). Extend
position, and is locked therein (Fig. 4) by being
ing into the cut-away portion of the firing
turned by the surfaces of the cam-recess 36 inV
plunger adjacent the surfaces 62 and 63 just re
the action-slide I8, so as to cause its combined
ferred to, is the cylindrically-contoured stem 64
operating-and-locking lug 3l and its 'locking
of a cartridge-extractor 65. The said stem 64
lug 48 to respectively engage with the locking
extends
substantially
vertically
downwardly
abutments 46 and 45.
\
through the forward portion of the breech-bolt 26
If now the hammer 66 is released to the action
in intersecting relationship with respect to the
of the hammer-spring 66, the upper~portion of
longitudinal passage 46 which accommodates the 30 the said hammer will swing forwardly and en
firing-plunger 56 in the breech-bolt 26. The an
gage with the projecting rear end of the firing
gle of the surface 63 on the firing-plunger 26 is
plunger 56 and drive the same forwardly, there
such that the said surface will engage with the
by causing the firing-point 55 to effect the dis
stem 64 before the guide-stem 58 of the firing
Charge `of the cartridge 16. The parts will now
plunger 56 can be brought clear of the stop-abut 35 have assumed substantially 4the positions in which
ment 66 and into registration with the longitu
.they are shown in Fig. 2.
dinal clearance-slot 56 in the breech-bolt 26. In
- The high-pressure gases developed by the dis
this manner, the cooperation of the surface 63
charge of the cartridge 76 as just above described,
with the stem 64 of the cartridge-extractor 65
will partly flow downwardly through the inclined
normally serves to prevent the firing-plunger 56 40 gas-passage 25 in the cylinder-lug 22,Y and will
from being turned sufficiently far to register its
drive the piston 21 rearwardly. The rearward
guide-stem 58 with the slot 56, so that the rear
movement of the piston 21 will be limited by
edge of the guide-stem 58 is retained in‘position
the ring-like stop-member 36 after `but, a brief
to be engaged with the stop-abutment 66 of the
movement, 4but the energy of the piston will have
breech-bolt, to thereby limit the rearward travel 45 been imparted to the action-slide I8, and willV
of the said firing-plunger with respect to the
drive the same rearwardly against the tension of
breech-bolt. The removal of the extractor 65
the breech-closing spring 38. The rearward move
and its integral -stem 64 will enable the ñring
ment of the action-slide I8 will cause the ap
plunger to be turned so that its guide-stem 58 will
propriate surfaces of the cam-recess 36 there
register with the slot 56 in the breech-bolt and 50 in, to cooperate with the combined.. operating
thereby permit the rearward withdrawal of the
firing-plunger from the breech-bolt 26.
Normally, the breech-bolt 26 may be oscillated
with respect to the firing-plunger 56 within the
and-locking lug 3l of the breech-bolt 26, to turn
the said breech-bolt from the position in which
it is shown in Figs. 2 and 4 into the position in ‘
which the said breech-bolt is shown in Figs.A
limits substantially represented by the angular 55 3 and `5. The turning movement of the lbreech
displacement of the two diverging surfaces 62
bolt just referred to, will disengage the lug 3l
and 63 on the said firing-plunger, as is indicated
and the lug 48 thereof from their respective co
in Figs. 9 and 10. This scope of relative move
operating locking-abutments 46 and 45, thereby
ment will maintain the rear edge of the guide
bringing the lugs 3l and 48 respectively into'reg
stem 58 of the firing-plunger 56 in position to be 60 istry with the clearance-passage 42 and the guide
checked in its rearward movement by its engage
groove 47 in the receiver I5.
,
.
ment with the stop-abutment 66 on the breech
Should the retracting-spring 52 of the Yñring
bolt 26. Normally, the firing-plunger 56 is main
plunger 56 have failed to act for any reason.V to
tained in its retired position by the tension of the
retire the said firing-plunger, >the turning move
retracting-spring 52, under which condition the 65 ment of the breech-bolt above referred tix-will
rear edge of the guide-stem 58 will be engaged
cause the retracting-surface 6I of thehreeclîl»V
with the stop-abutment 66 of the breechwbolt 26,
bolt to engage with the forward edge of the guide
as is particularly well shown in Figs. 3, 7 and 11.
stem'58, and thereby forcibly retire the said i'lr
In the particular ñrearm chosen for illustration
ing-plunger, so that’its firing-point 55 will be
in the accompanying drawings, a hammer 66 is -70 drawn rearwardly (Fig. 3) out of position where
pivotally connected to the rear portion of the
in it can engage with the primer of a cartridge.
trigger-plate unit Il by means of a pivot-pin 61.
Thus, in the event that the retracting-spring 52
The particular form of the hammer 66 or its
of the firing-plunger 56 should become damaged,v
equivalent, is of no vital import with' respect to
the present invention but, as shown, the said
or should the firing-point 55 become so wedged >
in a defective primer as to renderthe said re.
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tracting-spring ineffective, the said firing-plung
breech-bolt for engagement with the retracting‘
cam surface and the stop-abutment thereof and
er will be forcibly and positively retracted by the
turning movement of the breech-bolt. This turn
ing movement of the breech-bolt relative to the
firing-plunger is possible, due to the fact that
the guide-head 59 of the firing-plunger is held
against turning movement by riding in the guide
groove 4l in the left side-wall 43 of the receiver'
I5. Thus, while the said firing-plunger is free
to move longitudinally with the breech-bolt 42l!
and also longitudinally with respect thereto, the
said ñring-plunger is held against turning move
ment relative to the receiver when the breech
bolt itself is turned with respect to the said re
having sliding engagement in the guideway of
the said receiver, the firing-plunger having a lat
erally-facing limiting-abutment and having rela
tive turning movement with respect to the »said
breech-bolt; spring-means urging the said firing
plunger rearwardly; and releasable limiting
means carried by the lsaid breech-bolt and posi
tioned to be engaged by the laterally-facing lim
iting-abutment of the said firing-plunger before
the lateral projection of the said firing-plunger
can pass out of engagement with the forwardly
,. . $1
ceiver.
Following the initial turning movement of the
breech-bolt to unlock the same as above de
scribed, its movement will continue rearwardly
in the normal manner of firearms until the just
l'lred cartridge has been extracted and ejected,
and the hammer 66 has again been cocked. Fol
lowing the rearward movement of the breech
facing stop-abutment in the clearance-passage of
the breech-bolt to thus prevent the inadvertent
rearward movement of the lateral projection of
the said firing-plunger through the longitudinal
clearance-slot in the said breech-bolt under the
urge of the said »spring-means.
2. A bolt-action ñrearm, including in combi
nation: a receiver formed with a bolt-receiving
chamber and with a longitudinally-extending
guideway located adjacent the said chamber; a
closing spring 38 will assert itself and move the
breech-bolt having both reciprocating and turn25
action-slide i8 forwardly and thereby also move
ing movement in the bolt-receiving chamber of
the breech-bolt 2U forwardly, and will ultimately
the said receiver, the said Ibreech-bolt having a
cause the said action-slide to turn the said breech
longitudinal plunger-receiving passage therein
bolt to again lock the same in its breech-closing
and also having a longitudinal clearance-slot in
position preparatory to another cycle of operation
tersecting its rear end and a clearance-passage
30
bolt 2û into its fully retired position, the breech
of the ñrearm.
n
laterally intersecting the said clearance-slot, the
The firearm may be operated manually, 1f de
said clearance-passage having a rear wall pro
sired, by means of the operating-handle 35 ex
viding a forwardly-facing stop-abutment .termi
tending laterally from the action-slide I8.
nating at one end at the said clearance-slot, the
From the foregoing it will be seen, that by
said breech-bolt also being formed in a forward
means of the present invention, an eñective con 35 portion of its said clearance-passage with an in
struction and arrangement of parts is provided,
whereby it is insured that the firing-point 55 or
its equivalent will be in its retired position when
clined retracting-cam surface facing generally
rearwardly; a firing-plunger mounted. in the
plunger-receiving passage of the said breech-bolt
the breech-bolt is moving forwardly, to thereby
and having a lateral projection extending out
avoid the accidental discharge of a fresh cartridge 40 wardly through the clearance-passage in the said
prior to the said cartridge having been fully
breech-bolt for engagement with the retracting
seated and the said breech-bolt having been fully
cam surface and the stop-abutment thereof and
closed and locked in its breech-closing position.
having sliding engagement in the guideway of the
The invention may be carried out in other spe
said receiver, the firing-plunger having a later
ciñe ways than those herein set forth without
departing from the spirit and essentia1 charac
teristics of the invention, and the present em
bodiments are, therefore, to be considered 1n all
ally-facing limiting-abutment and having rela
tive turning movement with respect to the said
breech-bolt; spring-means urging the said firing
plunger rearwardly; and a cartridge-extractor
respects as illustrative and not restrictive, and all 50 carried by the said breech-bolt and having a Stern
changes coming within the meaning and equiva
extending transversely of the breech-bolt and
lency range of the appended claims are intended
positioned to be engaged by the laterally-facing
to be embraced therein.
limiting-abutment of the said ñring-plunger be
I claim:
fore the lateral projection of the said iiring
l. A bolt-action firearm», including in combina
,- plunger can pass out of engagement with the for
tion: a receiver formed with a bolt-receiving
wardly-facing stop-abutment in the clearance
chamber and with a longitudinally-extending
guideway located adjacent the said chamber; a
passage of the breech-bolt to thus prevent the in
advertent rearward movement of the lateral pro
jection of the said firing-plunger through the lon
gitudinal clearance-»slot in the said breech-bolt
under the urge of the said spring-means.
3. A bolt-action firearm, including in combi
breech-bolt having both reciprocating and turn
ing movement in the bolt-receiving chamber of
the said receiver, the said breech-bolt having a
longitudinal plunger-receiving passage therein
and also having a longitudinal clearance-slot in
tersecting its rear end and a clearance-passage
nati-on: a receiver formed with a bolt-receiving
chamber and with a longitudinally-extending
laterally intersecting the said clearance-slot, the
guideway located adjacent the said chamber, the
said clearance-passage having a rear‘ wall pro
said receiver also having a locking-recess later
ally intersecting the said guideway; a breech
bolt having both reciprocating and turning move
nating at one end at the said clearance-slot, the
ment in the bolt-receiving chamber of the said
said breech-bolt also being formed in a forward
portion of its said clearance-passage with an in 70 receiver and provided with a laterally-projecting
viding a forwardly-facing stop-abutment termi
clined retracting-cam surface facing generally
rearwardly; a firing-plunger mounted in the
plunger-receiving passage of the said breech-bolt
and having a lateral projection extending out
Wardly through the clearance-passage in the said
locking-lug movable in both the guideway and
the locking-recess of the said receiver, the said
breech-bolt having a longitudinal plunger-re
ceiving passage therein and also having a longi
tudinal clearance-slot intersecting its rear end
2,404,555
and a clearance-passage laterally intersecting
the said clearance-slot, the said clearance-pas
sage having a rear wall providing a forwardly
facing 'stop-abutment terminating at one end at
the said clearance-slot, the said breech bolt also
being formed in a forward portion of its said
clearance-passage with an inclined retracting
cam surface facing generally rearwardly; a lir
ing-plunger mounted in the plunger-receiving
passage of the said breech-bolt and having a lat
eral projection extending outwardly through the
clearance-passage in the said breech-bolt for en
gagement with the retracting-cam surface and
the stop-abutment thereof and having sliding en
gagement in the guideway of the said receiver,
the ñring-plunger having a laterally-facing lim
iting-abutment and having relative turning
10
said receiver and provided with a laterally-pro
jecting locking-lug movable in both the guide
way and the locking-recess of the said receiver,
the said breech-bolt having a longitudinal plung
er-receiving passage therein and also having a
longitudinal clearance-slot intersecting its rear
end and a clearance-passage laterally intersect
ing the said clearance-slot, the said clearance
passage having a rear wall providing a forward
ly-facing stop-abutment terminating at one end
at the said clearance-slot,rthe said breech-bolt
also being formed in a forward portion of its
said clearance-passage with an inclined'retract
ing-cam surface facing generally rearwardly; a
firing-plunger mounted in the plunger-receiving
passage of the said breech-bolt and having a lat
eral projection extending outwardly through> the
clearance-passage in the said breech-bolt for en
movement with respect to the Isaid breech-bolt;
gagement with the retracting-cam surface and
spring-means urging the said firing-plunger rear
the stop-abutment thereof and having slidingY
wardly; and releasable limiting-means carried 20 engagement
in the guideway of the said receiver,
by the said breech-bolt and positioned to be en
the firing-plunger having a laterally-facing lim
gaged by the laterally-facing limiting-abutment
iting-abutment and having relative turning
of the said firing-plunger before the lateral pro
movement with respect to the said breech-bolt; '
:lection of the »said ñring-plunger can pass out
of engagement with the forwardly-facing stop 25 spring-means urging the said firing-plunger rear
wardly and a cartridge-extractor carried by the
abutment in the clearance-passage of the breech
said breech-bolt and having a stem extending
bolt to thus prevent the inadvertent rearward
transversely of the breech-bolt and positioned to
movement of the lateral projection of the said
be engaged by the laterally-facing limiting-abut
ñring-plunger through the longitudinal clear
tiring-plunger before the lateral
ance-slot in the said breech-bolt under the urge 30 ment of the said
` projection of the said firing-plunger can pass
of the said 'spring-means.
out ofV engagement with the forwardly-facing
4. A bolt-action firearm, including in combi
stop-abutment in the clearance-passage of the
nation: a receiver formed with a bolt-receiving
breech-bolt
to thus prevent lthe inadvertent rear
chamber 1and. with a longitudinally-extending
movement of the lateral projection of the
guideway located adjacent the said chamber, the 86 ward
said ñring-plunger through the lonigtudinal
said receivei- also having a locking-recess lat
erally intersecting the said guideway; a breech
bolt having both reciprocating and turning
movement in the bolt-receiving chamber of the
clearance-slot in the said breech-bolt under the ,
urge of the said spring-means.
DAVID M. WILLIAMS;
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