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Oct- 29, 1945-
Filed April 15,‘ 1942
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650965 R 0604/?
l/ZqYA/E 6‘ - 50445
Patented Oct. 29, [1946
" ‘2,410,100
, ronMAomNE GUNS
1 George R.;0scar,» West Milton, and Wayne S. 4
Boals, Dayton, Ohio
_ Application April 173, 1942, Serial No. 438,744
“1 Claim.
(01. 89—--27)
(Granted nnder the act of" March 3, 1883, as
amended April 30, 1928; 370 0. G. 757)
_ I The'invention described herein may be manu
moving the back plate containing the spade grips .
ernmental purposes, without the, payment to us
control operation may be effected by merely'ree
factured and used by or'for Government for gov
of any royaltythereom,
' arapid change from manpal operation to remote
and. manual trigger "and replacing it with one
containing the. solenoid. In' this manner the
.. This invention relates to a trigger-actuating
solenoid is eliminated as a separatemechanisrn
mechanismnfor ?rearms and more particularly
to a mechanism of, this’nature which‘ can be
,controlledat a distance from the ?rearm con
‘7 {It is old
;' in ~the'_ prior
art to
control r the
to be attached to the gun and consequently the
arming time of thegun is considerably reduced.
Accordingly, one of the objects. of our invene
tion is to provide aremote-control trigger-am»
tuating mechanism for a machine gun of the
Browning type which‘ mechanism will .notiin
point._ A device of this nature is shown in U. S.
crease the .overall width or length of the gun.
Patent No. 1,352,891, issued to Samuel G. Green
Another object of'our invention is to provide
on September 14, 1920. According to the dis
closure of this patent, a solenoid is securedvto :15 a solenoid controlled ?ring .me'chanism which
will operate directly upon the conventional trig
therear end of. the gun and a plunger-actuated
gar-mechanism of the Browning machine gun,
. bylth'e- solenoid is connected by a linkage v'tothe
thereby eliminating the need of any -costly're;
trigger-of the gum. Thus, when the solenoid-is
vision of the, present machine‘ gun structure. '
energized-the trigger is actuated and the gun
A further object of our invention is to provide
caused to ?re; Itwill be noted in the patent to 2,0
a remote-control trigger-actuatingv mechanism
Green, however, that the solenoid is secured be,
for a Browning machine gun in which the meché
hind the pistol grip of the. gun, the plunger of
ani'sm is secured to the back plate of the gun
the solenoid being connected to'the trigger by
tionof a, trigger of a ?rearm from a distant
so as to enable ready conversion of the gun from
.means ‘of a pivoted. lever and-a depending link.
This arrangement, results in the overall length .25 manual control to solenoid control by a mere
interchange of back plates.. '
1 ,
- '
oi‘gthe gun being increased and necessitatesthe
Still a further object of our invention is .to
use" of a, large ‘solenoid in order to overcome the
provide a solenoid controlled ?ring mechanism ,
friction/and weight of the lever ,= and link. In
for a machinergun which is ‘comparatively light
ordergtozreduce the bulk and weight of the Green
device and,‘ at the same time to simplify the .30 in weight and inexpensive to construct. It is
possible with our arrangement to use a smaller“
construction, .we-propose the use of a solenoid
which is conveniently arranged so as not-to add
to the overall length of the gun and which. also
‘acts in a direct manner to operate the trigger and
cause ?ring ,of the gun. .
.In} ‘addition to the ‘arrangement disclosed by
Green,‘~ it has been common practice to mount
and lighterisolenoid than has been heretofore
possible due to the fact that the plunger operates
directly upon the trigger mechanism of the gun
rather than through a system of links or cams.~
The weight ‘of. our-system is “further reduced as
a-result; ofpthe elimination of the linkages and
camming structures which were formerly inter
the solenoid on the side of a machine gun of
posed between the. plunger and the conventional '
> the Browning type with the solenoid plunger
projected through the side wall of the breech 40 trigger mechanism of the gun.
In the drawing which follows we have shown
casing and into close proximity tothe sear. A
our improved device mounted on the back plate
cam face provided on the sear and also upon
of a Browning machine gun of the type disclosed
the plunger results in depression of the sear
in U. S. Patent No. 2,050,539, issued to Frederick
when the plunger is operated and causes the
gun to ?re. It will be perceived, however, that 45 T. Moore on August 11, 1936, and U. S. Patent
No. 2,108,060, issued to Samuel G. Green on
the placing of the solenoid on the side of the
February 15, 1938.
gun increases the overall width of the gun and
Figure 1 is a side elevation of our device show
also causes complications in the construction of
ing how the same cooperateswith the conven
the internal mechanism of the breech. In con
tional machine gun structure, the back plate and
trast to this sort of an installation, we propose
breech casing of the gun being shown in cross
» to mount the solenoid on the back plate of the
section in order to better illustrate the invention.
gun where it can actuate the conventional trigger
Figure a rear view of our improved device.
-mechanism and where it will not increase the
In Figure 1 of the drawing, a conventional
overall width of the gun. It will also be noticed
that by mounting the solenoid in this position, 55 back plate of the type used with a Browning ma
chine gun is indicated at iii. This plate may be
removed from the gun by sliding it upwardly out
of the breech casing, the side plates i2 and M
56 which is clamped to the rear end of the bu?er
tube 28 by a bolt 58. One arm of the bell crank
52 is provided with a thumb plate 63, the other
arm 52 being provided at its upper end with a dog
of the casing being provided with vertical grooves
which receive suitable tenons' provided on they
64.‘ The dog 6411s pivoted to the‘arm 62 at 66
back plate. The breech casing'is provided with
and may be moved to either ane?‘ective or in
a top plate It and a ‘bottom plate It so as to
effective position for actuating the plunger 42.
completely enclose the breech mechanism and.
thus protect it from dirt and. injury. A. sear.
actuating arm 28 is situated within‘t‘he breech.
As shown in Figure 1, the dog is in its eiiective .
known manner and being adapted-to depress the ‘
position, with the projection 63 thereon in posi
tion to} contact the‘ rear end of the plunger 42
and move the plunger to the right when the
thumb plate 60 is- depressed. The dog 64 is held
sear when the rear end of the arm is lift'ed’by
in the position shown in Figure l by means of a
casing, this arm being pivoted therein in a well
the trigger.
The back plate is latched in‘ place - - spring-loadedball detent' located in a recess in
15 the arm 62 (not shown). If it is desired to render
the rear
in the
of back
the gun
24. Aofcompression
a latch
themanual operating means ineffective, the dog
may be moved ninety degrees counterclockwise
direction about its pivot 24, thusoausin'g anotcjh M1: from its‘v Figure 1 position Where it will be re
25 formed in the latch to engage with the-Tea? -. tained by the detent. In this position of the dog,
edge of the bottom plate l8. To remove the back
the projection 58 will be'ineiiective to actuate the
plate it is only necessary to release the latch 22
plunger 42 upon depression of the thumb plateBD.
and slide the plate" upwardly out of the gun;
The bell crank 572is'provided withatorsion/spring
“it which normally retains‘ the bell crank in-its
To the back plate iii is secured the well-known
counterclockwise, or Figurel, position. '
bu?er tube 28 on 'the'top of which is mounted a
solenoid 30 by means of straps 32 and'clamping
From the above description and the accom
spring 25 urges the latch in a counterclockwise
bolts 34.
In order to insure that the solenoid
panying drawings it will be seen that We have
will not be jarred'out of position during ?ring of
provided a solenoid trigger-actuating mechanism
the gun, a forwardly extending ?ange 3E on the
> which may be operated from a distance to effect
solenoid is received between spaced ?anges 32
provided on the back plate l8 ‘secured thereto
by means of rivetsliil. A spring-retracted plunger
42 is located Within the ‘solenoid’ and is provided
with an extension 44 which'engages the rear face
of a trigger 46 pivoted at 41 in a recess cut in the
back plate. This ‘trigger is normally urged in a
clockwise direction’ by means‘ of a’ compression
spring 43 so as to insure the release of'the sear
actuating’arm- 20 by the trigger when the sole
noid is deenergized. The extension 44 is threaded
at one end and screws into a tapped’ hole extend
ing longitudinally into the end of plunger d2. A
nut 49 screwed onto ‘the extension 44 provides a
means for adjustably securing the extension in
the end of the plunger 42. By means of this ad
justment the position of the trigger with respect
to the sear actuating arm- when the solenoid is
deenergized may be adjusted as desired. A con
ductor 50 is connected to the solenoid for sup
plying the energizing current thereto so as-to
enable the solenoid to expel the plunger 42 against
the trigger 455, thus swinging the trigger in a
counterclockwise direction about its pivot M so
the ?ring of a machine gun. It will also-be ob‘
served that the solenoid is so mounted?‘ on the
rear of the gun‘ that it may act directly upon ;
the conventional trigger’ mechanism thus dis~
pensing with- a-ny intermediatelinkages.w It will
further be seen-that‘ by securing the solenoid di
rectly to the back plate of the gun‘iit is possible
to change over from a remotely controlled ?ring
system to a manual one by a‘ simple interchange
of back plates. ‘The’ extreme simplicity-andv de—
sirability of our device asv compared"with the
40 prior art devices, is readily apparent from‘ the
drawing and the foregoing description.
Whatwe claim as new and desire to secure by
Letters Patent is:
For use with a machine gun, a ?re control de
‘vice. comprising a back plate, a. buffer tube se
cured to 'i said back plate; a trigger pivotally
mounted on said'back plate, a solenoid for elec
trically operating the gun; means for clamping
said solenoid to said bu?er tube, ap-lunger of
extensible length within said solenoid aligned
with said trigger so as to cause the gun to be
?red‘ when ‘the. solenoid is energized and perma
as to cam up the end of the sear actuating arm 26.
nently locked means ‘secured to said solenoid and
If desired, amanual means for ?ring the gun
to said back plate'for locating and holding said
may be supplied in addition to thesolenoidf, this 555 plunger in alignment with'said trigger. l
means taking the form of a bell crank 522 (see'Fig.
2), which is pivotally mounted at 54 on'a‘ bracket
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