Improvements in Single-trigger Double-barrelled Guns.
Year: 1898

page_text: Date of Application, 2nd Feb., 1898
Complete Specification Left, 25th Oct., 1898-Accepted, 23rd Dec., 1898
Improvements in Single-trigger Double-barrelled Guns.
I, FERNAND DUMOULIN, of 2, Thier de la Fontaine, Liége, in the Kingdom of
Belgium, Manufacturer of Firearms, do hereby declare the nature of this invention to
be as follows:-
This invention relates to a new single trigger device controlling the two tumblers of
double-barrelled hammerless guns, and also to a safety device which according to its
position, allows either barrel to be fired or safely secures the firing mechanism.
This invention is shewn on the annexed drawings. Figures 1 and 2 are right-hand
side views of the mechanism when cocked. In Figure 1, the safety device is pushed
or drawn back for the discharge of the left-hand barrel; in Figure 2 this safety device
is thrown or pushed to its extreme forward position for the discharge of the right
hand barrel and the lever of the corresponding tumbler is shewn in section. The block
of the trigger-guard plate is sectioned centrally and longitudinally.
Figure 3 is a left-hand side view of the mechanism which is shewn in the safety
position.
Figures 4 and 5 are plan views of the mechanism as shewn in Figures 1 and 2.
respectively, with the two tumbler levers. Figure 4 represents the right-hand barrel
fired and Figure 5 the left. These two figures thus shew plan views of the drop-down
gun as though the rear of the barrels were cut away on line y-y of Figure 1, the
action bolted to said barrels being shewn in plan with the safety mechanisın
removed.
The remaining figures shew various views of the components of the action-
mechanism.
In this invention, the levers a of the tumblers are operated or controlled by a piece
or an attachment c Figures 1 to 5, 15 and 16, screwed upon the trigger 6 and which
moves vertically therewith; in addition, this movable piece can move horizontally to
right or left under the action of the safety mechanism, so as to fire either the right.
or the left hand barrel, as desired. This attachment c is further horizontally actuated
or operated upon by rods d, Figures 1 to 5 and 8 and 9, which after the discharge of
the corresponding barrel, are each brought forward in succession by their springs f;
the arrangement of the rods d is well known but their action upon the movable
attachment c is new.
The safety device, Figures 1 to 3 and 10 to 14 is, in general, of a well known
construction, but it presents novel features or peculiarities; it consists of a lever g
which can move on or rock around its pivot g¹ placed or secured in the plate h of the
trigger-guard; it is actuated by a thumb-piece g². Upon or to this lever g is hinged
or jointed a rod i Figures 1 to 3 and 10 to 12, which is furnished at its left with a
projection towards its base, Figure 10, which when it is above the tooth c¹ of the
attachment c, Figures 3, 15 and 16, fixes and locks the mechanism. The rod i is
also furnished, at its right hand side, with two teeth 12 23 (longer than i¹) which
descend for the length of the right side on to the attachment c, forward and rear-
ward of the shoulder c² of the movable piece or attachment c, Figures 1, 2 and 16.

page_text: When the gun is cocked, if the rod of the safety device be actuated or moved, the
teeth 123 come in contact with the shoulder c² of the movable piece c and cause the
latter to pivot to the left or right according as it is pushed to the bottom or end of
the course or stroke to the rear or front, and according as it is wished to discharge the
left or the right-hand barrel.
The spring m of the safety mechanisın Figures 1, 2, 3, 13 and 14, has two pro-
jections or teeth m¹ and m2, being a well known arrangement. When the peg g³ of
the thumb-piece g² is between the projections m¹ and m2, the mechanism is secured
and locked, Figure 3.
If then the thumb-piece g² be drawn back, Fig. 1, the movable piece c pivots to
the left and the left barrel may be discharged, whilst if g2 be pushed right forward
the movable piece c pivots to the right and. the right barrel may be discharged, as
will be explained hereafter.
The cocking of the hammerless mechanism takes place in the usual manner; by
this cocking the parts n Figures 1 to 5 are drawn or thrust back by the hammers
and engage the rods d which both assume the position of the rod d on the left of
Figure 4. If the thumb-piece g" occupy the same position as is shewn in Figure 3,
that is to say, if the peg g³ is between the projectious m¹ m² of the spring m of the
safety device, the action-mechanism is locked or secured; if it be drawn or pushed
to the bottom or end of its rearward stroke the tooth 3 of the rod i meets or abuts
against the shoulder c2 of the inovable piece c and causes this to pivot towards the
left (Figure 4); then the movable piece c is under the shoulder a¹ of the lever a of
the left tumbler; if the operator press on the trigger 6 the movable piece c is
raised with this latter and the left barrel is discharged. The hammer or firing pin
having then struck, the left rod d'is 'freed and under the influence' of its spring f, it
is quickly drawn or pushed forward; during this movement the nose d2 of the rod d:
of the left, abuts against or meets the rearward lower and rounded end of the movable
piece c, slides upon. it and causes it to pivot towards the right, Figure 5; the
movable piece is then under the shoulder a¹ of the lever of the right-hand
tumbler and on pressing the trigger, the right hand barrel is discharged; the nose 1.
of the right hand rod dabuts in its forward inovenent by means of the spring f,
against the movable piece cand returns it to its central position.
The right hand barrel can, of course, be the 'first discharged; the gun being
cocked it is sufficient to cause the thumb-piece 2 to slide forward; the tooth 22 of
the rod of the safety mechanism abuts against the shoulder c² of the movable piece c
and causes it to pivot or turn towards the right. Then the piece c is under the
shoulder a¹ of the lever of the right tumbler and the right-hand barrel will be the
first discharged. To impart stability to the movable piece c in its firing positions,
a rod o 'Figures 2, 4, 5, crosses or passes through the block p of the plate of the
trigger-guard and is urged rearward by a spring o¹, Figure 2.
The course or stroke of this rod is limited by a set-screw projecting into a groove
or notch in the said rod: This rod bears at its lower or rear extremity o² on to
one of the bent sides of the forward or upper extremity of the piece c, according to
the position occupied by this latter, see Figures 4 and 5.
The trigger b is shewn in side elevation and in plan view on Figures 6 and 7.
respectively.
Dated this Souand day of hebruary 1808
-

page_text: COMPLETE SPECIFICATION.
Improvements in Single-trigger Double-barrelled Guns.
I, FERNAND DUMOULIN, of 2, Thier de la Fontaine, Liége, in the Kingdom of
Belgium, Manufacturer of Firearms, do hereby declare the nature of this invention
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
This invention relates to a new single trigger device controlling the two tumblers
of double-barrelled haminerless" guns, and also of a safety device which according
to its position, allows either barrel to be fired or safely, secures the firing,
mechanism."
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This invention is shewn on the drawings annexed to my
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Provisional Specification,
Figures 1 and 2 are right-hand side views of the mechanism when cocked. In,
Figure 1, the safety device is pushed or draw back for the discharge of the left-hand
barrel; in Figure 2 this safety device is thrown or pushed to its extreme forward
position for the discharge of the right hand barrel and the lever of the corresponding
tumbler is shewn in section. "The block of the trigger-guard plate is sectioned.
centrally and longitudinally."
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Figure 3 is a left-hand side view of the mechanism which is shewn in the safety,
position.
Figures 4 and 5 are plan views of the mechanism as shewn in Figures, 1 and 2.
respectively, with the two tumbler levers. Figure 4 represents the right-hand
barrel fired and Figure 5 the left. These two figures, thus shew plan views of the,
drop-down gun as though the rear of the barrels were cut away on line yy of
Figure" 1, the 'action' bolted to said barrels being shewn in plan with the safety.
mechanism removed.
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The remaining figures shew various views of the components of the action-
mechanism.
In this invention, the sears a of the tumblers are operated or controlled by a piece.
or an attachment c Figures 1 to 5, 15 and 16, screwed upon the trigger 6 and which
inoves vertically therewith; in addition this movable piece can move horizontally
right or left under the action of the safety mechanism, so as to fire either the right.
or the left hand barrel, as desired. This attachment è is further horizontally actuated
or operated upon by rods 'd, Figures 1 to 5 and 8 and 9, which after the discharge
of the corresponding barrel, are each brought forward in succession by their springs;
the arrangement of the rods is well known but their action upon the movable,
attachment c'is new.
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The safety device, Figures 1 to 3 and 10 to 14 is, in general, of a well known
construction, but it presents novel features or peculiarities; it consists of a lever g
which can move on or rock around its pivot placed' or secured in the plate h of
the trigger guard; it is actuated by a thumb-piece 92. Upon or to this lever gis
hinged or jointed a rod i, Figures 1 to 3 and 10 to 12, which is furnished at its left
with a projection towards its base, Figure 10, which when it is above the
tooth cl of the attachment c, Figures, 3, 15 and 16, fixed and locks the mechanism.
The rod i is also furnished, at its right hand side, with two teeth 12 23 (longer than ¹)
which descend for the length of the right side on to the attachment c, forward and.
rearward of the shoulder c² of the movable piece or attachment c, Figures 1, 2,
and 16. When the gun is cocked, if the rod of the safety, device be actuated or
moved, the teeth 2228 cor
come in contact with the shoulder c² of the movable piece c
and cause the latter to pivot to the left or right, according as it is pushed to the
bottom or end of the course or stroke to the rear or front, and according as it is
wished to discharge the left or the right-hand barrel.
The spring m of the safety mechanism Figures 1, 2, 3, 13 and 14, has two projec-
tions or teeth m¹ and m², being a well known arrangement. When the peg g³ of

page_text: the thumb-piece g² is between the projections m¹ and m², the mechanism is secured
and locked, Figure 3.
If then the thumb-piece g2 be drawn back, Fig. 1, the movable piece c pivots to
the left and the left barrel may be discharged, whilst if g² be pushed right forward
the movable piece c pivots to the right and the right barrel may be discharged, as
will be explained hereafter.
F
The trigger bis shewn in side elevation and in plan view on Figures 6 and 7
respectively.
The cocking of the hammerless mechanism takes place in the usual manner; by
this cocking the parts n, Figures 1 to 5, are drawn or thrust back by the
hammers and engage the rods d which both assume the position of the rod d on the
left of Figure 4. If the thumb piece g² occupy the same position as is shewn in
Figure 3, that is to say, if the peg 93 is between the projections m¹ m² of the
spring m of the safety device, the action-mechanism is locked or secured; if it be
drawn or pushed to the bottom or end of its rearward stroke, the tooth 23 of the rod i
meets or abuts against the shoulder c² of the movable piece c and causes this to
pivot towards the left (Figure 4); then the movable piece c is under the shoulder a¹.
of the sear a of the left tumbler; if the operator press on the trigger b the movable
piece c is raised with this latter and the left barrel is discharged. The hammer or
firing pin having then struck, the left rod d is freed and under the influence of
its spring f, it is quickly drawn or pushed forward; during this movement the
nose d² of the rod d of the left, abuts against or meets the rearward, lower and
rounded end of the movable piece c, slides upon it and causes it to pivot
towards the right, Figure 5; the movable piece c is then under the shoulder a¹
of the sear a of the right-hand tumbler and on pressing the trigger, the right
hand barrel is discharged; the nose d³ of the right hand rod d abuts in its
forward movement by means of the spring f, against the movable piece c and returns
it to its central position.
The right hand barrel can, of course, be the first discharged; the gun being
cocked it is sufficient to cause the thumb-piece g² to slide forward; the tooth 22 of
the rod of the safety mechanism abuts against the shoulder c² of the movable
piece cand causes it to pivot or turn towards the right. Then the piece c is
under the shoulder a¹ of the sear of the right tumbler and the right hand
barrel will be the first discharged. To impart stability to the movable piece c in its
firing positions, a rod o Figures 2, 4, 5, crosses or passes through the block p of the
plate h of the trigger guard and is urged rearward by a spring o¹, Figure 2.
The course or stroke of this rod is limited by a set-screw projecting into a
groove or notch in the said rod. This rod bears at its lower or rear extremity o²
on to one of the bent sides of the forward or upper extremity of the piece c,
according to the position occupied by this latter, see Figures 4 and 5.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In hammerless double-barrelled guns, a single-trigger mechanism which allows
the right or the left hand barrel to be fired as desired, consisting of an attachment (c)
movable vertically with the trigger (b) and capable of pivoting horizontally in such a
manner as to, under the action of the safety device actuated by the thumb-piece (g²),
place itself as desired under either the one or the other of the sears (a) of the
cocked mechanism to be, after the first barrel has been discharged, afterwards
driven back under the sear (a) of the second barrel by the rod (d) corresponding
to the barrel fired.