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Патент USA US2134604

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Ütì. 25, ÉÈBS.
I
I F_ T, FAHLEN
2,134,504
' sINGLE-TRIGGER DEVICE
Filed Oct. 22, 1956
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SINGLE-TRIGGER DEVICÉ
2,134,604
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Ócì.. 215, 1938.
F, T_ FAHLEN A
SINGLE-TRvIG-GER DEVICE
Filed Oct. 22, 1956
SECO/V0 Flll
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2,134,6@4
3 Sheets-Shea?l
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Patented Oct. 25, 1938
2,134,604
SIN GLE-TRIGGER DEVICE
Frederick T. Fahlen, Phoenix, Ariz.
Application October 22, 1936, serial No. *107,071k
(C1. vL12-_42)
14 Claims.
This invention relates to improvements in fire
arms, more especially in the trigger mechanism
for the firing thereof, and its objects are as fol
lows:
First, to provide a single-trigger device for
Ui
10'
Figure 4a is a rear perspective view of said sear.
_ Figure 5 is a side elevation of the gun receiver
showing the change in position of the parts fol
lowing the second pull of the right trigger. ‘
Figure 6 is a similar view showing the effect of
double-trigger, double-barreled ñrearrns, which
allows the firing of the shell in each barrel by the
a ñrst pull ofthe left trigger.
use of one and the same trigger, and to permit the
shell in either barrel selected to be fired first.
of Fig. l.
-
Figure 8 is a cross section taken. on the line
Second, to provide a “floating” auxiliary sear
8_8 of Fig. 1.`
for the foregoing purposes, said sear being un
connected to the receiver in which it mov-es back
'
Figure 9 is a cross section taken on the line
9_9 of Fig. 1.
_
and forth between the triggers, only its form and
frictional engagement with adjacent parts serv
tional view, logically iollowing Fig.` 5, but show
ing to hold it in place.
ing how the movement of the auxiliary sear may 15
Figure 101is a partially -elevational and sec
v
be limited by engagement with the trigger blades
Third, to provide a single-trigger device which
is of the utmost simplicity, inasmuch as it con
sists of only two main parts (the auxiliary sear
in some types of gun receivers.
‘
Figure 1l is a partially elevational and. sec
tional view of another form of the invention
wherein the structure is slightly modiñed but the
principle is not altered in the least.
and its latch), which is capable of being incor
2‘9’ porated in the gun without necessitating any
substantial change in the gun, and which will not
require nor cause any change in the action of
Figure l2 is a horizontal section taken substan
tially on the line |2_I2 of Fig. 11.
the safety device.
Fourth, to provide a single-trigger device which
insures certainty of action when operated, in that
_
-
Figure 13 is a fractional side elevation of the
construction in Fig. 11, illustrating the effect of
25
the first pull of .the left trigger.
Figure 14 is a View similar to Fig. 13,` illustrat
ing the effect of the secondpull of the left trigger.
the arms of the auxiliary sear are constantly in
so
v
Figure 7- is a cross section taken on the line 1_1
position beneath the right and left trigger sears,
thereby making said action more rigid and posi
tive and, in addition, supplying the very impor
tant factor of increased leverage because of the
length of the auxiliary sear and its iulcrum-po
sition on the trigger plate of the receiver.
Fifth, to avoid the need of any inertia weight,
Figure 1_5 is a cross section taken on the line
|5-I5 of Fig. ll.
_
/
f
,
Figure 16 is a detail perspective'view of the
auxiliary sear in Figs. 11 to 14.
30
. _
Figure 1'7 is a detail perspective view of the
friction cam or other mechanism to hold theI aux
latch.>
35 iliary sear prior to the second voluntary pull of
.
By way of a prefaceit is desired 'to state that
the same trigger in firing the shell of the second
barrel, this being accomplished by a shoulder on
said auxiliary sear which engages the rear edge of
the active trigger blade, or the sear or sear fingers
the improved single-trigger device affords such
regulation of the firing functions of the ñrearm
that the chance of unintended double firing is
reduced to a minimum. Said unintended double
firing is caused by the recoil of the fire-arm im
in some guns, after the first pull.
Sixth, to provide an auxiliary sear for a single
mediately after the ñrst voluntary pull of the
40
trigger device, which is made to actuate both
trigger. The gun travels backfaster than the
sears on the second voluntary trigger` pull because
of at least one shoulder that it has coming into a
finger can follow, allowing the trigger to be re
leased. The almost instantly occurring forward
reaction of the firearm `causes the trigger to press 45
45 bridging position in respect to the trigger blades
or sears in the manner explained below.
Other objects and advantages will appear in
the following specification, reference being had
to the accompanying drawings in which:
Figure l is a side elevation of the receiver of a
gun showing the parts in what is herein chosen
as the first position wherein both hammers are
cocked.
‘
»
Figure 2 is a horizontal section taken on the
against the ringer so that an involuntary double
fire occurs. This undesirable condition is relieved
by the free-acting auxiliary sear and its arrange
ment of arms and shoulders, the details of which
are fully brought out below.
In the drawings, I designates, generally, the re
50
ceiver of a gun, in this instance the receiver of
a double-barreled shotgun, the barrels and stock
of which are omitted. 'I‘he known structure of
Figure 3 is a longitudinal section taken sub
stantially on the line 3_3 of Fig.l
illustrating
this receiver comprises the following parts: the 55
right (Fig. 3) and left (Figs. l, 5 and 6) 'harn
mers 2, 3, right and left sears ¿3, 5 (Fig. 2) and
the ñrst pull of the right trigger.
the right and left triggers ë, l.
line 2_2 of Fig. l.
’
,
.
Figure 4 is a front perspective View of the aux
60 iliary sear.
‘
’
Each of thehammers 2,".3 is spring-pressure
operated, for whichv purpose each has a notch 8 60
2
2,134,604
at which one end of a heavy spring (not shown)
is coupled, the opposite end of each spring being
anchored in the forward end of the receiver.
Each hammer also has a bottom shoulder 9 with
which the respective sear engages when the
hammer is cocked. The triggers 6, 1 are sup
ported by a common pivot I6 which is held in
a mount II that arises from the trigger plate I2.
The blades I3, I4 of the right and left triggers
10 Work in slots I5 (Figs. '1, 8 and 9) in this plate.
The right and left trigger blades, I 3, I4 have
heels I6, I1 respectively.
l
The mount II has a hole I8 which contains a
portion of and guides the rod I9 of the safety
15 lever 20. The rod and lever are pivoted together
at 2I, and the lever is pivoted to the trigger plate
I2 at 22. The lever is operable by a finger-piece
23 on top of the receiver. Said finger-piece has
combined with it a stout leaf spring 24, the latch
20 25 of which is adapted to occupyeither one of
preventing the .pulling of either trigger. '
The free end of the latch is formed into a head
51 which is adapted to rest on the-center rib 31 of
the auxiliary sear 35 when the mechanism is in
the cocked and firing position (Fig. l). Said 10
head has a'stop pin 58 (Fig. 3) which projects on
each side (Fig. 2). 'I‘he stop pin engages behind
the bases 59 of the trigger blades i3, I4 (or en
gages the equivalent of the mount II in some
guns) when the mechanism is in the cocked and
Vfiring position (Fig. 1), and the tops of the bases
after either trigger is released after the first
pull.
two notches 26, 21, respectively representingv the
It so happens that the typeV of gun receiver
shown in Figs. 1 to 9 includes the lug or yoke 20
29 which adapts itself to limiting the forward
safety or non-shooting (dotted lines, Fig. l) and
movement of the auxiliary sear 35.
shooting (full lines, Figs. 1, 3, 5 and 6) positions
of the finger-piece.
desire to make it plain that this circumstance
may not occur in every type of gun receiver, at
tention is directed to Figurek 10 which is intended 25
to illustrate how the same effect is accomplished
otherwise. The structure here shown is identi
cal in its main aspects with that already de
scribed, for which reason corresponding refer
25
The rod I 9 has a hitherto solid lug 29. The
cocking lever 30 has means 3| (Fig. 1) for cock
ing the hammers 2, 3 when turned inV one direc
tion. Returning to the sears 4, 5 (Fig. 2), these
are commonly pivoted at 32 to the receiver
30 I. They extend backward beside the mount II,
and terminate in inwardly directed fingers 33,
34. This ends the description of the known
structure.
The improvement comprises the fol
lowing construction:
35
and down and front and back, unless the finger
pîece 23 is in the safety position (dotted lines,
Fig. 1) when the yoke 29 obstructs the studs 55,
56. In this same position of the finger-piece the
yoke 29 is directly over the trigger heels I6, I1,Y
`
The fore
going lug 29 is forked at 29a (Fig. 9) to change
it into the yoke shown for the purposes of the
invention. The auxiliary sear, generally Vdesig
nated 35 (Fig. 4) , consists of a body 36 from the
lower portion of which a center rib 31 and lateral
arms 38, 39 extend forwardly.
v
The rib and arms are produced by slotting at
40 and 4I what would otherwise be a solid plate.
The top surfaces of the elements 31, 38 and 39
are tapered at 42V to blunt points 43, the points
of the arms 38, 39 constantly underlying the sear
fingers 33, 34 (Fig. 2) so as always to beïready
for operation.
,
A slot 44 in the top of the body 36 (Fig. 4)`
and the cutting away of the latter at 45 form a
pair of shoulders 46, 41 which are adapted to en
gage the rear edges of the trigger blades I3, I4
(Figs. 3A and 6) as explained below, or the sears
C." Cl or sear fingers in some guns._ I-Ioles 48, 49, or
their equivalents, provide anchorages for the
springs 50, 5I. Each of these is a push spring.
'I’he spring 50 is secured to the preferred one of
the pins 28. It can be made to abut some other
GO solid part of the receiver, but here the safety
lever is most convenient. In any event the func
tion of the spring 50 is to give the auxiliary sear
35 a forward push when permitted to do so.
A latch 52 tends to prevent movement of the
auxiliary sear. The latch is pivoted at53 to and
` between the shoulders 46,41, occupying most of
the slot 44 wherein it has a >lug 54 which holds
the spring 5I that presses _upwardly against the
latch 52. The spring turns the latch counter
clockwise.
ence numerals are used without repeating the 30
description.
`
Instead of having the pair of studs 55, 56
engage the yoke 29 or some equivalent of it, the
front surfaces 60 of the auxiliary sear 35 are al
`
A number of differently directed spring pins 28
are formed on the safety lever 20.
Out of a
Said latchV has a _pair of vstuds _55,
56 adjacent to the body 36. a These studs coact
with the respective trigger heels I6, I1 which
they overlie (Fig. 2). TheV latch 52 occupies
most of the- space (Fig. 3) in the yoke 29, and
the latch is freely movable in this space,`both up
lowed to engage the rear of the trigger blades I3,
I4.l It is conceivable that in some guns the auX
iliary sear may be stopped in its forward move
ment by the rear of the sear or sear ñngers, as
already suggested. To further illustrate the in
dependence of the auxiliary sear from the safety
device, the spring 5l! is shown abutting some
solid part 6I of the gun receiver, other than the
safety lever 20.
'
Attention isr nowY directed to Figs. 11 to 1'1
which illustrate a modification of the device in
which the motion is reversed from that in the
preceding form. This is a further exempliñca
tion of the fact that there can be considerable
variation in the structure without altering the
principle. The same reference numerals are 50
used for the known receiver structure, only- add
ing the exponent letter a for distinction between
they two forms, there being additional known
structure, to wit:
The pivot 62 of the safety lever 20a is carried 55
by a box 63 which is set in the wooden stock (not
shown) of the gun.V This lever is forked at 64.
Said safety lever is operated above the pivot by a
rod 65 which pushes the upper portion backward
when the gun is cocked by use of the cooking 60
lever 39a. Consequently the yoke 64 assumes the
safety position (dotted lines, Fig. 11),_making it
necessary to slide the finger-piece 23a forwardly
(full lines) before either trigger can be pulled.
A description of the so-called new structure in 65
the modification follows: The mount IIa is re
cessed at 66 to seat a spring 61 which tends to
push the auxiliary sear 35a backward. In this
respect thebasic 'action is reversed from what'it
is in Figs. 1 to 10, wherein the basic action under 70
the pressure of the spring 56 is forward. The
front edge of each sear finger 33a, 34‘n1 (Fig. 12)
is beveled or rounded at 6B.
These bevels coact with the confronting
beveled surface 69 on the shoulders 10, 1I of the 75
3
2,134,604
body 35a. The latter is centrally divided at 12
(Fig. 16) to form the lateral arms 38a, 39a, the
step-cuts in each of these providing stops 13, 14.
The upper and lower surfaces 15, 16 provide rests
as presently appears.
center prong 11.
The auxiliary sear has a
.
The latch 52a is now pivoted at 53a to a stud
‘I8 which is fixed on the trigger plate 12a. The
stop pin 58a, which is an embodiment of the
10 earlier studs 55, 55 and stop pin 58, now appears
in bent form (Fig. 17), the bending being re
gun receiver it conveniently serves that purpose. 10
In other gun receivers the limitation may be ac
cemplished equally well by the rear of the trigger
(Fig. 11). The ends of the stop pin rest on each
of the upper and lower surfaces 15, T5, at dif
ferent times (Figs. 13 and 14). The lug 53a
retains the spring 5|a which now rests against
blades (Fig. 10), or either the sears or sear nn
gers in other types of gun receivers.
the trigger plate l2a, the latch being carried by
the auxiliary sear.
`
The operation of the form in Figs. 1 to 9 is as
follows: The position of the mechanism herein
adopted as the first position, is that in which the
hammers 2 and 3 are cocked, and either one of
the triggers 5, 1 is free to be pulled because of
25 finger-piece 23 having been moved forwardly to
the shooting position. In cooking the ñrearm the
action of the means 3| (Fig. 1) is to push back on
the rod i9, moving the safety lever 20 and the
iinger-piece 23 to the safety position (dotted
30 lines). The same action moves the entire single
trigger device, consisting of the auxiliary sear 35
and its latch 52, backward because of the pressure
of the yoke 2S against the studs 55, 56.
In the iirst position the stop pin 58 engages
35 behind the trigger bases 59 (Fig. 2), having been
urged to do so by the pressure of the spring 5l
against the rear end of the latch 52 when the
firearm was cocked. This engagement holds the
auxiliary sear 35 against forward movement
under pressure of the spring 50.
If it is desired to ñre the shell in the right
barrel first, the right trigger 5 must be pulled
first. If it is desired to ñre the shell in the left
...s CA
another step (Fig. 5)», the auxiliary sear 35 now
being within the range of movement of the trig
gers (Fig. 5), whereas initially it was not. This
comprises the third position of the mechanism,
and in it said device is limited by the engagement
of the studs 55, 55 with the yoke 29. This limita
tion of the device is not necessarily performed
by the yoke 29, although in the instant type of
quired to enable coaction with the stops 13, 14
the latter instead of being an intimate part of
20
moves the Ventire"single-trigger device forward
barrel ñrst, then the left trigger l must be pulled
iirst, this constituting the selection of the barrel
in which the shell shall be fired iirst. Suppose it
is desired to fire the right shell first. The first
pull of the right trigger (Fig. 3) rocks the right
sear ii in the direction of the arrow a because of
if.) the pressure of the right trigger blade I3 against
the sear iinger 33 at the arrow b. The right ham
mer 2 is released (arrow c) and the right shell
is fired ñrst.
Upward pressure of the heel I6 against the
stud 55 (arrow d, Fig. 3) turns the latch 52 clock
wise against the tension of its spring 5|. The
resulting release of the stop pin 58 from the bases
5S lets the spring 50 move the entire single-trig
ger device forward slightly. The engagement of
v the right shoulder 56 with the now raised heel I6
limits the movement. Some guns do not have
the heels lë, il of the trigger blades extending
behind the sear fingers 33, 34 as in the instant de
scription. In such cases the sear fingers 33, 34
play the part of the trigger blade heels, stopping
the forward movement of the auxiliary sears by
the engagement of one or the other of the shoul
The stop pin 58 simply engages the'tops >of the 15
trigger bases 59 on which it pivots when the right
trigger 6 is given the second pull (Fig. 5). In as
suming the third position (Fig. 5), the lateral
arms v38, 39, already part-way under the sears
è, 5, are driven farther under the sear fingers
33, 34, making a snug ñt between the adjacent
20
top surface of the trigger plate I2 and the nether
surfaces of said sear fingers. This prevents lost
motion.
Now when the right trigger is given said second 25
pull (Fig. 5), the upward pressure of the heel I6
(arrow c) against the right shoulder liß turns the
entire single-trigger device on the fulcrum which
the points 43 provide at f (Fig. 5). Both sears
fi, 5 are turned on their pivot 32, but only the 30
turning of the left sear 5 is now eiïective. This
releases the left hammer 3 (arrow y, Fig. 5) and
the left shell is iired. The release of the right
trigger by the operator lets the single-trigger de
vice rest in the farthest forward position, in 36
which it virtually is already, and this could be
regarded as the first or starting position, had the
cocked position in Fig. 1 not been so chosen be
fore.
’
Thus the initial'pull of the right trigger iires 40
the right shell ñrst, and its second pull ñres the
left shell next. Had itbeen chosen to fire the
left shell first, the left trigger l would have been
initially pulled and the same principle of opera
tion Vas with respect to the right trigger would
have resulted. Notice the first pull of the left
trigger 7 in Fig. 6. The left trigger heel I1 ele
vates the latch 52 by contact with the stud 56 as
the left trigger blade i4 raises the left sear 5
to release the left hammer 3.
The position then assumed by the mechanism
corresponds to position two (Fig. 3). The entire
single-trigger device moves forward slightly until
the left shoulder 41 engages the heel I1. Relaxa
tion of iìnger-pressure on the left trigger will 55
let the single-trigger device settle forward, there
by duplicating position three (Fig. 5) in readi
ness for the second left trigger pull.
Attention is now directed to Figs. 11 to 1'7
which illustrate the previously mentioned modi 60
fication wherein the single-trigger device is im
pelled backward as firing progresses, instead of
forward. Only the left trigger ‘Ia is given con
sideration this time, the action of the right trig
ger being identical, as the reader doubtless un
65
derstands by this time.
As seen in Fig. 11 the stop pins are at rest
ders 45, ä'i with the respective sear fingers.
The operator keeps his iinger on the right trig
ger 5, but momentarily relaxes the pressure. The
return of the trigger to its original position (into
which both triggers are constantly urged by the
pressure of unshown springs upon the right and
on the surfaces 15, the stops 13, ‘M being pressed
thereagainst by the spring 51. The shoulders T0,
left sears) lets the shoulder 45 pass over the
The first act is to pull the left trigger 'la (Fig.
13). The’left trigger blade Ma lifts the sear 75
heel I6, under influence of the spring 5l) which
il are notl yet in position above the sear fingers 70
33a, 35a, but the latter bridge both arms 38a, 39a,
and the respective right and left trigger blades
l3“,_ Ma.'
4
2,134,604:
iînger 34a (arrow g), turning the left sear 58'
and releasing the left hammer 3a (arrow h).
rEhe upward movement of the left trigger blade
(arrow i) also lifts the latch 52a (arrow k) be
selected trigger to then displace the latch and
free the auxiliary 'sear for subsequent move
ment, and a push-spring to then move the aux
iliary sear into range of the raising movement of
cause of its catching under the nearest crooked Y the triggers and said portion farther under the
Since the lower end of the latter sears so as to raise both sears with a lever
is lifted above the stop 'I4 (Fig. 13) the spring action upon said second pull. '
stop pin 58a.
E? expands a little, but only to the extent of
pushing the auxiliary searV 35a rearward until
10 beveled surface 69 of its shoulder 1I stops against
the waiting sear finger 34a.
3. In a double-trigger,Y double-barreled firearm
having a pressure-actuated hammer for each
barrel and a sear to hold each hammer in a 10
cocked position, an auxiliary sear having a por
Now when finger-pressure on the left trigger is . tion constantly in position beneath the sears in
momentarily relaxed, the rear end of the -sear readiness for operation following the raising of
5a will swing down until its finger 311a leaves
one of the sears by a first pull on the selected
15 contact with the shoulder 'Il and lines up with
trigger, a latch movably carried by the auxiliary 15
space therebeneath. The restriction on the
sear, means acting on the latch to make a part
spring 6i being removed, the latter is free to push of the latch engage a part of at least one trigger
the auxiliary sear 35ZL farther, this time until the
body 36a engages the bevel 68 ofthe sear finger
20 (in fact, both sear fingers), the position being
thereby to initially hold the auxiliary sear out ofk
range of the raising movement of the triggers,
said selected trigger being adapted to be given a 20
well shown in Fig. 14 which, however, shows the
second pull, coacting means respectively on the
next firing act.
triggersand on the latch, being mutually engaged
'
Both sear fingers 33a, 34a are locked together
by being caught under the shoulders lll, ‘H (Fig.
25 16). It is easy to see that the second pull of
the left trigger (Fig, 14) will cause its blade 14a
to repeat what it did before, namely lift the sear
finger 34“, but because the two are locked to
gether the right sear finger 33a will be lifted also,
30 and this will release the right hammer 2a (Fig.
13). The entire auxiliary sear 35iL rises from the
on the first raising movement of the selected
trigger to then displace the latch and free the
auxiliary sear for subsequent movement, and a 25
push-spring to then move the auxiliary sear into .
range of the raising movement of the triggers and
said portion farther under the sears so as to raise
both sears with a lever-action'upon said second
pull.
trigger plate i2a (Fig. 14), the attendant raising
4. In a double-trigger, double-barreled ñrearm
having `a pressure-actuated hammer for each
movement of the latch 52a merely being idle.
Upon recocking the two hammers by means of
barrel anda sear to hold each hammer in a
35 the lever 3ab (Fig. 11) , the action on the rod 65
will be such as to turn the safety lever 2l]a into
the dotted line position. Since the center prong
il! is in the Way of the solid part of the safety
lever, it follows that the auxiliary sear will be
restored to its forward position where it becomes
temporarily locked by the latch 52a dropping
into its original place by the pressure of the
spring ¿ila (Fig. 11).
I claim:
f
,
l. In a double-trigger, double-barreled firearm
having a pressure-actuated hammer for each
barrel and a sear to hold each hammer in a
cocked position, an auxiliary sear having a por
tion constantly in position beneath the sears in
» Vreadiness for operation following the raising of
one of the sears by a first pull on one of the
triggers, means initially holding the auxiliary
sear out of range of the raising movement of
the triggers, said one trigger being adapted to be
i, given a second pull, means comprising part of the
respective triggers which then works to displace
the previously stated holding means so as to re
move the restriction on the auxiliary sear, and
means to then move the auxiliary sear into range
ce. of the raising movement of both triggers and said
portion farther under the sears so as to raise both
sears with a lever-action upon said second pull.
2. In a double-trigger, double barreled ñrearm
having a pressure-actuated hammer ' for each
barrel and a sear to hold each hammer in a
30
cocked position, an auxiliary sear having arms
partly in position constantly beneath the sears 35
in readiness for operation following the raising
of one of the sears by a first pull on the selected
trigger, a shoulder on the auxiliary sear, a latch
movably carried by the auxiliary sear, means
acting on the latch to make a part of the latch
engage a part of at least one trigger thereby to
initially hold the auxiliary sear out of range of
the raising movement of the triggers, said se
lected trigger being adapted to be given a sec
ond pull, coacting means respectively on the
45
triggers and on the latch, being mutually en
gaged on the first raising movement of the se
lected trigger to displace the latch, a push-spring
to then initially move the auxiliary sear until
the shoulder abuts a part of the raised trigger,
and means to limit the further movement of the 50
auxiliary sear due to said spring to a position
over said part of the selected trigger when let
loose, said arms going farther under said sears
upon said further movement of the auxiliary
sear, the second pull of the selected trigger turn 55
ing the auxiliary sear by pressure against a
shoulder, the arms turning with a lever-action
to raise both sears.
5. In combination with the yoke of a safety
lever rod and a pair of triggers on each of which
a hammer sear bears, a single-trigger device in
unconnected and consequently “floating” opera
tive relationship to the triggers and having
means to temporarily engage a part of the seiect
cocked position, an auxiliary sear having a por
ed trigger upon pulling said trigger to raise the
tion constantly in position beneath the sears in
readiness for operation following the raising of
respective sear and preparatory to a subsequent
65
one of the sears by a first pull on one of the trig
` gers, said one trigger being adapted to be given
second pull of the selected trigger, a spring to
advance said device upon a momentary vrelaxa
tion of linger-pressure on the selected trigger to
a second pull, a latch which initially holds the
auxiliary sear out of range of the raising move
a new position so that said means overlies the
ment of the triggers, coacting means respectively
on the triggers and on the latch, being mutually
and means carried by said device engaging the
yoke to stop the device in the new position, so
that said device exercises a lever-action on both 75
engaged on the first raising movement of the
70
previously engaged part of the selected trigger,
5
2,134,604
sears when the selected trigger is pulled the sec
ond time.
6. In combination with the trigger plate of a
fire-arm receiver, trigger blades and hammer sears
in position to be raised by the blades, said plate
having a safety lever pivoted thereto, and having
latch, being engageable by the latch to displace
the auxiliary sear from said stop means.
1l. In a double-barrelled and double-triggered
firearm having sear lingers superimposed upon
the trigger blades, a single-trigger device com
prising a latch, a pivotal support for the latch
a pair of slots for said blades, an auxiliary sear
near one of its ends, stop means on the other
in “floating” operative relationship to the trig
ger plate, safety lever, trigger blades and sears,
end of the latch, superimposed on the trigger
blades, a shiftable auxiliary sear having stops
abutting the stop means and checking the auxil 10
iary sear from shifting, shoulders on the auxil
iary sear held away from the sear iingers, and
10 said auxiliary sear consisting of a body having
shoulders which are engageable by either trigger
blade, a spring between the safety lever and
body loosely pressing the body toward the trig
ger plate, and arms extending from the body
15 close to the outsides of said trigger blades and
beneath the sears.
7. In combination with the trigger plate of a
ñrearm receiver, said plate having a safety lever
pivoted thereto and having a pair of slots, a pair
20 of triggers each of which has a blade occupying
the respective slot, hammer sears in position to
be raised by the blades, an auxiliary sear in
“ñoating” operative relationship to the trigger
plate, safety lever, trigger blades and hammer
25 sears, said auxiliary sear consisting or“ a body
having shoulders which are engageable by either
trigger blade, a spring between the safety lever
and body loosely pressing the body toward the
trigger plate, arms extending from the body
30 close to the outsides of said trigger blades and
beneath the sears, a latch pivoted to the body,
a spring tending to rock the latch in one direc
tion, studs which are brought into positions for
engagement by parts of the triggers due to said
35 rocking, and a stop pin on the latch that is
adapted to temporarily engage other parts of the
triggers.
means to shift the auxiliary sear and aline its
shoulders with the sear fingers after displace
ment of the stop means from the auxiliary sear 15
stop by the motion of a trigger wherein the
latch is raised.
l2. In a double-barrelledand double-triggered y
firearm, a single trigger device comprising a
latch having stop means abutting one portion of 20
the trigger blades andv studs within the range of
movement of another portion of the trigger
blades, a shiftable auxiliary sear having means
pivotally carrying the latch, shoulders on the
auxiliary sear held out of range of said other 25
parts of the trigger blades, and means to shift
the auxiliary sear and aline the shoulders with
said other parts after displacement of the stop
means by raising the latch through engagement
of a stud by the depression of a selected trigger. 30
13. In a double-trigger, double-barreled ñre
arm having a pressure actuated hammer for each
barrel and a pivoted sear to hold each hammer
in a cocked position, a single-trigger device
comprising a body having a shoulder initially out
of registration with a trigger blade, arms pro
jecting from said body, having their fulcrum
8. In a double-barrelled and double-triggered
points initially partially disposed beneath the
ñrearm, pressure-actuated parts which by their
sears, and a spring which acts _after the ñrst
40 movement release a respective hammer, a sin
pull of one of the triggers to move said device so
gle-trigger device by which to actuate the ham
as to bring the shoulder within range of the trig
mers serially, comprising a latch, stop means on
ger blade and the fulcrum points of said arms
farther under the sears and closer to the pivots
the latch in an initially displaceable position in
respect to said part, a shiftable auxiliary sear
which is then held from shifting so that one part
can be moved without aiîecting the auxiliary
sear, a shoulder on the auxiliary sear also held
out of range of said part, and means to shift the
auxiliary sear and aline the shoulder with both
50 parts after displacement of the stop means by
movement of said one part.
9. In a double-barrelled and double-triggered
ñrearm, a single-trigger device comprising a
latch, stop means on the latch in an initially
55 engaging and displaceable position relative to
the trigger blades, an auxiliary sear engaging the
stop means thus being held away from the sears
and against shifting, a shoulder on the auxiliary
sear also held away from the sears, and means
to shift the auxiliary sear and aline the shoulder
with both sears after displacement of the stop
means and latch by the first actuation of a se
lected trigger.
10. In a double-barrelled and double-triggered
65 firearm, a single-trigger device comprising an
auxiliary sear having sear-engaging shoulders
and stop shoulders, a spring tending to push the
auxiliary sear in one direction, a latch having
stop means then engaged by the stop shoulders
check the auxiliary sear, sear i'lngers and
70 to
trigger blades from which the sear-engaging
thereof, preparatory to a lever-action thereupon
through the initial operation of the single-trigger
device by a second pull of said one trigger.
14. In a gun having a safety lever rod mov
able in one direction to a safety position, a pair
ofA triggers on each of which a hammer sear
bears, and a portion depending from said rod; a 50
single-trigger device movable to a set position by
said depending portion when the rod is moved in
said one direction, being unconnected and con
sequently in “floating” operative relationship to
the triggers, means embodied in said device to 55
temporarily engage a part of a selected trigger
upon pulling said trigger to raise the respective
hammer sear and preparatory to a subsequent
second pull of the selected trigger, a spring to
advance said device from its set position upon a 60
momentary relaxation of finger-pressure on the
selected trigger to a new position so that said
means overlies the previously engaged part of the
selected trigger, and means carried by said de
vice then engaging the depending portion to stop 65
the device in the new position preparatory to
restoring the single-trigger device to its set posi
tion as the lever rod is counter-moved to its
safety position after said device has exercised a
lever-action on both sears when the selected
trigger is pulled the second time.
shoulders are then held spaced, and means pro
jecting from the auxiliary sear overlying the
FREDERICK T. FAHLEN.
70
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