Improved Safety Mechanism for Guns.
Year: 1895

page_text: Date of Application, 25th Sept., 1895
Complete Specification Left, 26th June, 1896-Accepted, 1st Aug., 1896
PROVISIONAL SPECIFICATION.
Improved Safety Mechanism for Guns.
We, JOHN ROBERTSON, trading as Boss & Co., of 73 St. James Street, Pall Mall,
in the County of Middlesex, Gunmaker, and WILLIAM ADAMS, of 4 Havelock Terrace,
Battersea, in the County of Surrey, Gunmaker, do hereby declare the nature of this
invention to be us follows:-
The present invention relates to an improved safety mechanism for locking guns so
that same will not be capable of being fired either by the action of the trigger or
triggers or by a jar or shock of any kind when the safety bolt is in the "safety"
position.
For this purpose the safety bolt is caused to lock the sear of each barrel, either in
addition to or without also locking the trigger or triggers, while such bolt in no way
interferes with the recocking of the haminer of either barrel after same has been
discharged, and at the same time if one barrel only has been discharged the sear of
the other barrel (and also the trigger if desired) can be locked by the safety bolt
during the action of reloading the discharged barrel and recocking the hammer of
same.
"
In carrying out this invention the safety bolt (which may be either operated
automatically by the action of opening the gun for reloading, or which may be actuated
by hand if desired) may be formed so that when moved backwards to the "safety”
position it is first brought over the sear of one barrel (say the left barrel), while if
the other barrel has been fired such backward movement brings the safety bolt against
an arin on the other sear, and prevents same passing over such sear to lock it.
soon however as the latter sear is lowered by the cocking of the gun, the safety
bolt under the action of its spring is able to complete its movement and lock the
second sear, and in order to fire either barrel the safety bolt must be first moved
forward.
As
The safety bolt may also be so formed and arranged that it can only complete
its backward movement to bring it over either sear after the hammers of both
barrels are cocked.
When the hammers of both barrels are cocked the backward movement of the
safety bolt will bring it over the sears of both barrels.
Dated this 28th day of September 1895.
ALLISON BROS.,
Agents for the Applicants.
Improved Safety Mechanism for Guns.
We, JOHN ROBERTSON, trading as Boss & Co., of 73 St. James Street, Pall Mall,
in the County of Middlesex, Gunmaker, and WILLIAM ADAMS, of 4 Havelock Terrace,
Battersea, in the County of Surrey, Gunnaker, 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:-
The present invention relates to an improved safety mechanism for locking guns

page_text: "
so that same will not be capable of being fired either by the action of the trigger
or triggers or by a jar or shock of any kind when the safety bolt is in the "safety
position.
For this purpose the safety bolt is caused to lock the sear of each barrel, either
in addition to or without also locking the trigger or triggers, while such bolt in no
way interferes with the recocking of the hammer of either barrel after same has been
discharged, and at the same time if one barrel only has been discharged the sear of
the other barrel (and also the trigger if desired) can be locked by the safety bolt
during the action of reloading the discharged barrel and recocking the hammer of
"
same.
In carrying out this invention the safety bolt (which may be either operated
automatically by the action of opening the gun for reloading, or which may be
actuated by hand if desired) may be formed so that when moved backwards to the
safety" position it is first brought over the sear of one barrel (say the left barrel),
while if the other barrel has been fired such backward movement brings the safety
bolt against an arm on the other sear, and prevents same passing over such sear to
lock it. As soon however as the latter sear is lowered by the cocking of the gun, the
safety bolt under the action of its spring is able to complete its movement and
lock the second sear, and in order to fire either barrel the safety bolt must be first
moved forward.
The safety bolt may also be so formed and arranged that it can only complete its
backward movement to bring it over either sear after the hammers of both barrels
are cocked.
When the hammers of both barrels are cocked the backward movement of the
safety bolt will bring it over the sears of both barrels.
But in order to enable this invention to be clearly understood we will proceed to
describe same by the aid of the accompanying drawings.
Fig. 1 is a longitudinal section of what is known as a single trigger double barrel
gun with this invention applied thereto.
Fig. 2 a plan view of same, and
Fig. 3 another longitudinal section of same showing the parts in the position after
one barrel has been fired and with the safety mechanism locking the part for effecting
the firing of the other barrel.
A is the safety bolt which is retained in its forward or backward position by the
action of its spring B, the backward movement of such bolt being effected either by
hand or automatically by the action of opening and closing the gun in the manner
which is well known and consequently need not here be described.
In the position shown in Figs. 1 and 2 the safety bolt is in its rearward or back
position and its lower end locks the sear of the right hand barrel by coming over
the top of the inwardly extending arm e of such sear while the backwardly projecting
arm 6 of such bolt is over the movable part or tumbler D which serves to act on the
sear C for firing the second barrel (in the manner presently to be described) so as to
also lock this sear.
When the safety bolt A is moved forward its underside is moved clear of the top
of the sear so that the right band barrel can be discharged by the pull on the
trigger E. After this has occurred the sear Cremains in its raised position and
when the bolt A is moved back again its arm c is (as shown in Fig. 3) in the path
of the lower end of such tolt so that it cannot be moved right back, but the
backwardly projecting arm 6 of such bolt is sufficiently long to ensure that the
partial backward movement shall bring same over the movable part or tumbler D
serving to act on the sear of the second barrel, so that this will be locked until
the bolt A is moved forward again.
During the firing of the first barrel and until after the termination of the involuntary
pull which occurs after the recoil due to the discharge, the movable part or tumbler D
cannot move to the position for acting on the second sear C. The means by which
this effect is produced is fully described in the Specification of Patent No. 22894
dated 26th November 1894 with reference to Figs. 27 to 56 of the drawings granted

page_text: mounted and also of a vertical movement upon such pin when it has turned to a
certain position, but which position it cannot assume until after the first barrel has
been discharged and the involuntary pull has terminated.
When the tumbler has moved to such position and the bolt A has been moved
forward the pull on trigger E (with which the tumbler D then engages) raises the
tumbler D and this acts on the arm c' of sear C₁and so discharges the second barrel.
The lower end of the bolt A may have a projection on its under side so as to also
lock the trigger when in its rearward position, as well as the sear or sears C
and C'.
Means for returning the tumbler D to its original position are also described in the
specification of the patent above referred to, so as to cause the first barrel to be
discharged when the trigger is again pulled.
Figs. 4 to 6 of the accompanying drawings show a suitable manner of applying
the invention to a two-trigger double barrel gun,
Fig. 4 being a longitudinal section,
Fig. 5 a plan view, and
Fig. 6 another plan view showing the parts in the position they occupy after one
barrel has been discharged and the safety bolt has been moved back so as to lock
the sear of the other barrel.
In this arrangement the bolt A carries a rocking part or plate A' at its lower end,
which plate has a nose or projection a¹, a³, at each side.
When both barrels are charged and the bolt A is moved back the nose a¹ will be
over the sear C of the right hand barrel, and the noso a' over the sear C¹ of the left
hand barrel, so that a pull on either trigger E or trigger E' will fail to discharge
either barrel. Upon the bolt A being moved forward either barral can be discharged
by a pull on either the trigger E or the trigger E' as desired. After firing, the
sear of the barrel discharged will remain raised and when bolt A is moved back one
of the noses a¹, a² (as the case may be) will come in contact with the inwardly
projecting arm of such sear and cause the rocking part or plate A' to turn on its
pivot and bring the other nose of such part or plate over the other sear, thus locking
the latter until the bolt is moved forward again.
The rocking part or plate A' may be returned to its normal or central position by
the action of a suitable spring or springs or the noses a', a³, of such plate may be
made sufficiently long to ensure either one projecting over its corresponding sear
when the part or plate A' is turned on its pivot slightly before the full backward
movement of the bolt is effected, whereby the locking of both sears is ensured when
the full backward movement is attained, even if the part or plate A¹ is not in its
central position.
In the arrangement last described the bolt A may (as in the arrangement previously
described) also serve to lock the triggers E, E¹, as well as the sears C, C₁, a suitable
method of effecting this being shown in Figs. 7, 8 and of the drawings.
Fig. 7 being a longitudinal section of a gun fitted with such an arrangement.
Fig. 8 a plan view of same, and
Fig. 9 a plan view with the parts in the position they occupy after the discharge
of one barrel and when the bolt A has been shifted back to the locking position.
It will be seen that the rocking part or plate A' has a downward projection a
which when the bolt A is in. its backward position is over the triggers E, E¹ and so
prevents either being pulled, while when such bolt is in its forward position such
projection is clear of the triggers either of which can then be pulled to fire the desired
barrel. It will be readily understood that the downward projection a' might be
formed on the lower end of bolt A itself instead of upon the rocking part or plate A¹
carried by such bolt.
In the arrangement shown in Figs. 4, 5 and 6 a bar or rod Q is shown in dotted
lines for automatically forcing the safety bolt A back to the position for locking the

page_text: sear or sears, by the action of opening the gun, such rod or bar being actuated by
the movement of the locking bolt lever for enabling the barrels to drop, in a similar
manner as in the arrangement described in the Specification of the prior Patent
No. 22894 A.D. 1894 above referred to in connection with Figs. 99, 100 and 101 of
the drawings of such specification, the action of the spring of the safety bolt completing
the backward movement of same after the sears have been lowered by the action of
cocking the gun.
In the whole of the arrangements described the locking of the sears (in combination
or not with the locking of the trigger or triggers) will besides preventing the
accidental discharge of the gun by a pull on the trigger or triggers, also prevent such
accidental discharge from a violent shock or concussion of any kind.
The invention for locking the sear, or both the sear and trigger, might also be
applied to single barrel guns.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improved gun provided with a safety bolt which locks the sear or sears of
the gun, so as to prevent the accidental discharge of same, substantially as specified.
2. The improved gun provided with a safety bolt which locks the sear or sears
and also the trigger or triggers of the gun, so as to prevent the accidental discharge
of same, substantially as specified.
DL: octh T 1800