Improvements in or connected with Single Trigger Double Barrel Guns.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Single Trigger Double Barrel
Guns.
I, THOMAS SOUTHGATE, of 6, Burton Crescent, in the County of London, Gun
Maker, do hereby declare the nature of this invention to be as follows:-
This invention refers to improved means for preventing the accidental dis-
charge of the second barrel, while the first is being fired, and to enable the
gun to be made selective *
as regards the lock desired to be brought into
action.
According to my invention, 1 provide on the axis of the right tumbler, a cam
shaped arm or crank, which latter co-acts with one end of a lever pivotted
centrally, and extending transversely across the trigger plate.
The opposite end of the transverse lever, acts upon the forward end of a
sliding rod carried in a frame hereafter described, located on the left hand side
of the trigger box, and the rear end of this sliding rod acts upon a rock bar,
pivotted in the trigger blade, the rearward end of the rock bar extending down-
wardly, to co-act with controlling devices, hereafter described, whereby the bar
is diverted and directed upwards between the sear tails after firing the first
barrel.
The sliding rod is carried in the frame and the latter is pivotted near its
rear end onto the trigger box, and formed on its under surface with cam edges
in such manner that by moving a slide the cam edges are acted upon, the
frame is rocked on its pivot, and the forward end of the sliding bar removed from
the action of the transverse lever, while the rock bar on the trigger blade is
rocked by its spring under the sear tails of the left hand lock. A reverse
action of the slide again brings the sliding bar into the position when it may
be acted upon by the transverse lever which is affected by the crank of the right
band tumbler.
By this arrangement I am enabled by suitably shifting the position of the
slide, to fire either barrel desired and thus make the firing of the gun "selective."
The before mentioned controlling device I employ, consists of a shaft mounted
in bearings on the trigger plate and free to slide in a direction parallel to the
length thereof and held forwards by a spring. At the forward end of the shaft
and fixed thereon, I provide a vertical head plate which is to co-act with the
rear downwardly bent end of the rock bar.
This vertical head plate is formed with a vertical upstanding edge, next the
right hand lock, so that supposing the latter tumbler to have just been fired,
the tail end of the rock bar is retained by this edge momentarily, while the
trigger is held raised.
As the trigger blade is lowered (and with it the rock lever), the tail of the
latter reaches one end of a groove in the head plate and is carried through
same by its spring, being directed in an upward direction, so that it is brought
against the end of the sear tail of the left hand lock, and then when free of
the groove in the head plate and released by the finger, the rock bar is brought
down by the trigger to below the sear tails of the left lock into firing position.
r

page_text: On the cocking of the gun the crank of the right tumbler acts upon the
transverse lever, which forces the sliding rod rearwards and rocks the rock bar
from the left side to under the tail of the right sear. In executing this move-
ment the tail of the rock bar comes into contact with the lower part of the face
of the head plate and forces the latter rearwards, so obtaining passage, and the
spring action of the shaft again brings the head plate into its normal position
ready for the actions already described to be repeated.
BREWER & SON,
London and Leeds, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Single Trigger Double Barrel
Guns.
1, THOMAS SOUTHGATE, of 6, Burton Crescent, in the County of London, Gun
Maker, 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 refers to improved means for preventing the accidental dis-
charge of the second barrel, while the first is being fired, and to enable the
gun to be made selective as regards the lock desired to be brought into
action.
:P
In order that my invention may be readily understood I will describe same
with reference to the accompanying drawings, whereon Fig. 1 is an elevation
of the right hand tumbler, detached, and having a cam hereafter described
fitted thereto. Fig. 2 is a rear elevation and Figs. 3 and 4 are plan views in
two positions of the parts shewn at Figs. 1 and 2, in conjunction with a lever
hereafter mentioned.
Fig. 5 is an elevation and Fig. 6 a plan view of the trigger mechanism and
paris connected therewith, fitted with my improved means for preventing the
accidental discharge of the second barrel, while the first is being fired. Fig. 7
is a plan view shewing the parts in position when the gun is cocked, and
Fig. S is a perspective view of a centrally pivotted lever, detached from the
trigger plate, and drawn to a larger scale. Figs. 9 and 10 are elevations and
Fig. 1a plan view of my trigger mechanism and parts connected therewith,
constructed to enable the gun to be made selective as regards the lock desired
to be brought into action.
Fig. 12 is a perspective view shewing a controlling device hereafter described,
detached from the other parts, and Figs. 13, 14, 15 and 16 are diagram views,
shewing relative positions assumed by the parts with which the controlling
device co-acts.
According to my invention and referring to Figs. 1, 2, 3 and 4, I fix on the
axis A of the right tumbler A. a cam-shaped arm or crank B, which latter
co-acts with one end of a lever pivotted centrally, and extending transversely
across the trigger plate D, see Figs. 6, 7 and 11.
At Fig. 6 the lever C is shewn in position with the gun uncocked, and in
this position it is shewn at Fig. 3 in conjunction with the tumbler A and its
arm B. Upon the tumbler A being cocked, the lever C is turned on its fulcrum
during the first part of the motion of the tumbler arm B. into the position
shown at Figs. 4 and 7, and as soon as the lever C has reached this position,
the lateral face of the arm 13 passes cff the rear face of the lever as the cocking
motion of the tumbler continues, and when fully cocked, the tumbler-arm B

page_text: is in contact with the end C of the lever C, as shewn at Fig. 4, thereby pre-
venting angular motion of the lever C and holding same stationary in position
as at Figs. 4 and 7, so long as the right hand tumbler is cocked.
The opposite end C2 of the transverse lever C, which is shewn detached at
Fig. 8, acts upon the forward end of a sliding rod E, carried in a bearing on
the left hand side of the trigger box G. and the rear end of this sliding rod E
acts upon a rock bar H, pivotted at H in the trigger blade H². The rearward
end of the rock bar Hextends downwardly, to co-act with controlling
devices hereafter described, whereby the bar is diverted and directed upwards
between the sear tails after firing the first barrel.
It will now be understood, that upon the cocking of the gun the crank or
arm B of the right hand tumbler acts upon the transverse lever C, which latter
forces the sliding rod E rearwards and rocks the rock bar H, from the left side,
where it is normally held by a spring H*, to under the tail of the right hand
sear.
The controlling device I employ, see the detached view Fig. 12, consists of
a shaft mounted in bearings on the trigger plate 1), and free to slide in a
direction parallel to the length thereof, and held forwards by a spring. At the
forward end of the shaft and fixed thereon, I provide a vertical head plate J
which is to co-act with the rear downwardly-bent end 13 of the rock bar H.
This vertical head plate J is formed with a vertical upstanding edge next the
right hand lock, and the front face of the plate J is also formed with a groove J
inclined upwards from the base of the vertical edge, and there is also an entrance
groove on the left hand side by which the tail end of the rock bar H
enters and forces back the plate during its traverse from the left to the right
hand side of same..
The diagram view, Fig. 13, shews the face of the plate J1 and the relative
positions of the rock bar H and tail K of the left hand sear before the gun is
cocked.
During the cocking of the gun the rock bar H will be rocked, and its rear
end H will enter by the groove J, as at diagram Fig. 14, and force back, and
pass to the right hand side of the vertical edge, when the plate will spring
forwardly. The rock bar will then be retained beneath the tail of the right
hand sear, in position for firing the right hand lock, by the action of the sliding
rod E. Supposing the tumbler A to have just been fired, the tail end H³ of
the rock bar is prevented rocking to the left hand side by the vertical edge of
the plate, as at diagram Fig. 15, so long as the trigger is held raised.
As the trigger blade H is lowered (and with it the rock bar H), the tail H³
of the latter reaches the lower end of the groove J in the head plate J, and
is carried through same by means of the spring H, being directed by the
inclination of the groove in an upward direction as at diagram Fig. 16, so
that it is brought against the end of the sear tail K of the left hand lock, and
then when free of the groove J2 in the head plate J', the rock bar H is brought
down by the trigger to below the sear tail K of the left lock into firing
positions.
When it is desired to render the gun selective as regards the lock desired
to be brought into action, the sliding rod E is carried in a frame F, and the
latter is pivotted at F near its rear end onto the trigger box G as shewn at
Figs. 9, 10 and 11, and formed on its under surface with cam edges F2, in such
manner that by moving a slide the cam edges are acted upon, the
frame F is rocked on its pivot F from the position shewn at Fig. 10 to that
shewn at Fig. 9, and the forward end of the sliding bar E thereby removed
from the action of the transverse lever C, while the rock bar 1 on the trigger
blade He is rocked by its spring under the sear tails of the left hand lock. A
reverse action of the slide again brings the sliding bar into the position shewn
at Fig. 9, when it may be acted upon by the transverse lever H, which is
effected by the crank 1 of the right hand tumbler A.

page_text: By this arrangement I am enabled by suitably shifting the position of the
slide, to fire either barrel desired and thus make the firing of the gun "selective"
as stated.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed. I declare that what
I claim is
1. In single trigger double barrelled guns, providing an arm on the axis of
one tumbler to rock a pivotted transverse lever by the cocking of the tumbler,
the latter lever operating a sliding bar, the rear end of which rocks a rock
bar pivotted on the trigger blade, against the action of a spring, from a position
beneath one sear tail to beneath the tail of the sear to be first acted upon; in
combination with a controlling device, consisting of a plate, capable of being
slidden rearwardly, (against the action of a spring) by the tail of the rock bar
in its transverse passage, and an upwardly directed groove in the face of the
plate, which groove the tail of the rock bar enters after the first barrel has been
fired, and is thereby directed upwards to between the ends of the sear tails,
and is then brought down by the trigger, and passes below the second sear
tail for the firing of the second barrel, substantially as herein before described.
2. In single trigger double barrelled guns the combination with the mechanism
as claimed by Claim 1, of the means whereby the gun is made selective as
regards the fock desired to be brought into action, consisting in mounting the
sliding rod in a movable frame, and providing a movable slide by which the
position of the frame can be altered, and the sliding rod brought into or out
of the sphere of action of the pivotted transverse lever, substantially as described.
3. In single-trigger double barrel guns, the arrangement and combination of
parts described with reference to Figs. 1 to 8, and 12 to 16 of the accompanying
drawings.
4. In single trigger double barrel guns, the arrangement and combination of
parts described, with particular reference to Figs. 9, 10, and 11 of the accom-
panying drawings.
5. The improvements in or connected with single trigger double barrel guns,
substantially as described and shewn in the accompanying drawings.
Dated this Sth day of December 1899.
BREWER & SON,
London and Leeds, Agents for the Applicant.