Year: 1899

page_text: improvещение II DIug10 11000
HERBERT JOHN BLANCH, Gunmaker, 29, Gracechurch Street, London, E.C.,
do hereby declare the nature of this invention to be as follows:--
A trigger having one finger part but two blades, the left hand one being dis-
connected when the right hand lock is cocked.
tu
When the right scear is raised it is held up by the shape of the tumbler, and
upon releasing the pull of the finger, the trigger begins to fall and is actuated
do so by
a light spring in addition to its own weight, but is retarded by a
timing device, connected with a backward extension of the right trigger blade,
or other movable part, which consists of a wheel connected by a link, crank, pinion
or equivalent, the inertia of which and the relatively small movement of the trigger
compared to the movement of the periphery of the wheel, ensures a momentary
retardation of the fall of the trigger blade.
This retardation, of less than one second, is for the purpose of covering the
interval of time occupied by the recoil and during which experience shows there
is a liability to give an involuntary second pull which unless guarded against
causes the discharge of the second barrel almost simultaneously with the first.
Upon the fall of the right trigger blade after firing the right lock, a pawl shapel
link pivotted to the right trigger blade, falls into a notch in the left trigger
blade, and upon the finger part being again pulled the left lock is discharged.
Upon opening the gun, the movement of the safety locking bar throws the pawl
out of engagement with the left blade, and upon unlocking the safety bar previous
to firing the first barrel, the pawl is prevented from engaging the left blade by
an upward extension which gives it a bearing behind the right scear, but after
the right lock is fired, the scear remaining up, the pawl is then free to engage
the left blade as soon as the retarding device will permit. That is to say, essen-
tially. In single trigger mechanism, a retarding device consisting of, a wheel
connected with an extension of the trigger blade, or other movable part, by a link,
crank, pinion, or equivalent, which by its inertia insures a momentary interval
before the completion of the necessary movement to engage the second scear after
raising the first.
And the combination of one trigger finger part with two trigger blades one of
which is disconnected when both locks are cocked, but can come into engagement
after firing the first barrel, as soon as retarding device will permit.
DOLL Ja of Amil 1800

page_text: Improvements in Single Trigger Drop-down Guts and the like.
I, HERBERT JOHN BLANCH, of 29, Gracechurch Street, in the City of London
Gunmaker, 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;-
My invention relates to drop-down double barrel guns of the kind wherein a
single trigger is used for discharging both barrels, the object of my invention
being to simplify the construction of the mechanism whereby the operation of the
trigger will successively release the two strikers and to provide improved means
for preventing the inadvertent discharge of the second barrel immediately after
the discharge of the first barrel,
The action to which I have applied my invention is of the kind wherein two
pivoted blades are employed which act upon the scears. Hitherto each of these
blades has been provided with a trigger; according to my invention only the
right hand blades is now provided with a trigger, the left hand blade being
adapted to be lifted from the right hand blade through the medium of a pawl
which before the right barrel is fired, is held back by contact with the right hand
scear but which, when this scear is moved to fire the right barrel, is adapted to
spring into engagement with the left hand blade so that the next pull upon the
trigger causes the right hand blade to lift the left hand scear. This pawl is
disengaged from the left hand blade and again put into firing position by a pin
in connection with the safety catch of the gun.
The retarding device consists of a wheel connected with an extension of the
trigger blade by a crank pin or the like, which wheel, by reason of its inertia,
ensures a momentary dwell before the completion of the necessary movement of
the trigger blade to allow the pawl to engage with the left hand blade.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which:-
Figure 1 is a left hand sectional elevation of so much of a gun action as is
necessary to illustrate the application of my invention thereto;
Figure 2 is a plan of the same.
Figure 3 is a section on the line 3-3 Figure 1; and
Figure 4 is a part plan with some of the parts shewn in Figure 2 removed;
Figure 5 is a right hand sectional side elevation of the gun action:
Figure 6 is a view similar to Figure 1 but shewing the parts in a different
postion;
Figure 7 is a view illustrating another position of some of the parts.
a is the trigger plate of the lock mechanism and b, bare the blades which are
pivoted in a luge by the pin d and the first mentioned 6 of which has the trigger e
formed in one piece with it and is provided with the rearward extension f which
is connected by a link g to a crank pin h on the retarding wheel is the pawl
which is carried by, and pivoted upon the blade 6, the said pawl having upon it
a lateral projection k, shewn clearly in Figure 3, which is adapted to enter a
recess or notch 7, Figures 1 and 6 and 7, formed in the rear end of the blade b.
m. Figures 2 and 5, is a spring, the free end of which bears upon a tongue #
upon the pawl and which when the pawl jis disengaged from the scear of the
right hand lock, serves to move the said pawl into engagement with the blade b
of the left hand lock; the said spring also acts to return the trigger to its normal
position after it has been pulled.

page_text: o is a spring in connection with the blade 6 which returns the said blade to its
normal position after it has been operated, p is a safety device which comprises
an arm q, a forwardly extending pin r, a levers (which latter is pivoted to the
trigger plate a at its lower end at t and near its upper end at t to the arm q) and
a pin which, when the triggers are locked, lies above projections u¹ on the
trigger blades, as shewn in Figure 1, and when unlocked over recesses u², as
shewn in Figure 6. The pin projects in such a manner that when the barrels
are dropped down the safety catch is moved rearwardly to place the pin u over the
projections u. The upper end of the arm s projects through the handle of the
gun and is provided with a finger plate so that, when the gun is closed, the safety
device may be moved forwards to disengage it from the trigger blades as shewn
in Figure 6. v, represent in dotted lines the ends of the scears which are
respectively operated by the trigger blades b, b¹.
The operation of the mechanism herein before described is as follows: Assume
the parts to be in the position shewn in Figure 1 and in Figure 5, which is the
position they assume when the breech is closed, that is to say, with the scear e
in front of the pawl j and supporting the latter against the pressure of its spring m
(so that the projection & cannot engage with the notch in the trigger blade b¹)
with the scear above the blade and with the safety catch locking the
trigger blades.
If now the gun is to be fired the first action is to push over the safety catch
from the position shewn in Figure 1 to that shewn in Figure 6 and then the
trigger can be moved so that the blade lifts the scear and discharges the right
hand barrel. When the trigger is released the blade is moved down under the
action of the spring m to such a position that the pawl is moved down and
springs forward under the lifted scear to the position shewn in Figure 7 so that
the projection & engages in the notch of the trigger blade b The next time
that the trigger is pulled the blade being locked to the blade is lifted there-
with so that the scear is operated and the left hand barrel discharged.
The return of the scear from the position shewn in Figure 7 to that shewn in
Figures and 6 is effected by means of a horn we formed upon the safety catch,
which hon extends between the two trigger blades and as the safety catch is
moved backwards during the opening of the gun, comes into contact with the
pawl and pushes it back past the end of the scear r, which having been held up
by the tumbler, on the completion of the cocking movement, falls in front of
the said pawl to hold it in the position shewn in Figure 1.
The connection of the extension f of the trigger blade 6 to the wheel i serves
to retard the downward movement of the said trigger blade, when the pressure
upon the trigger is suddenly relieved during the recoil of the gun in a well
known manner, to such an extent that the end of the said pawl has not moved
below the scear e until after the involuntary pull upon the trigger, which takes
place during the recoil, has been made.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. In a single trigger double barrelled gun the combination with a pair of
trigger blades of a pawl carried by one of the said blades and adapted to engage
with the other of the said blades in such a manner that when one lade has been
moved to operate its scear, the said pawl is allowed to engage with the other
trigger blade, substantially as described.
2. In a single trigger double barrelled gun, the combination with a pair of
trigger blades adapted to co-operate with a pair of scears and one of which blades
carries a pawl designed at a certain time to engage with the other blade, of a
wheel to which an extension of the trigger blade carrying the pawl is connected
for the purpose of retarding the movement of the said trigger blade under the
action of its spring, substantially as described.

page_text: 3. The improved mechanism for single trigger double barrelled guns consisting
of the parts constructed and combined substantially in the manner herein before
described and illustrated in the accompanying drawing and operating as, and for
the purposes, set forth.
ديد
1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agent for the Applicant.