Improvements in or connected with Locks for Small Arms.
Year: 1892

page_text: Date of Application, 12th Sept., 1892
Complete Specification Left, 10th June, 1893-Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Locks for Small Arms.
I, THOMAS SOUTHGATE of 6 Burton Crescent, Euston Road, in the County
of London, Gunmaker, do hereby declare the nature of this invention to be as
follows:-
Many arrangements have been employed for the purpose of preventing the
accidental discharge of small arms especially in double barreled guns where the
concussion of the discharge of one barrel often causes the discharge of the other,
and more particularly when the pull is light, but the arrangements have never been
altogether satisfactory, and it is the object of this invention to effect this purpose
in a more efficient manner than heretofore, rendering tumbler interceptors
unnecessary by locking the sears when in bent at full cock, all as hereafter
described.
In
According to my invention I employ a locking bolt with spring attached, or
separate therefrom, and a stop block on the plate, or other convenient part.
fitting this safety to a gun lock the locking bolt is pivotted on the upper surface of
the sear tail, or other convenient part for example it may be affixed to the lock
plate forming its own spring or otherwise; if it is pivotted on the sear tail it would
be allowed, or free to move or rock on its centre a convenient distance to block or
release the sear. A stop block is formed on the inner surface of the lock plate
When the lock is
above the sear tail, with space between to allow for the pull off.
cocked the locking bolt is pressed by its spring into the space between the stop
block, and the sear tail thus safely locking and holding the scar nose in the bent of
the tumbler rendering it impossible for the tumbler or hammer to fall until the
trigger is pulled.
.
The trigger is formed with a spur or projection extending upwards behind the
sear tail and in contact with the inner or free end of the locking bolt; this spur is
sloped in such manner that when the trigger is pulled the said slope presses the
inner or free end of the locking bolt forward, thus causing the "bolting" end to
come backwards out of the space between the stop block and the sear tail, and
thus releasing the sear to be pulled off and the hammer to fall, the locking
bolt remaining outside until the lock is again cocked, when the space is again
filled by the locking bolt as before.
I Cantambor 1800
BREWER & SON,
33, Chancery Lane, London, and 30, East Parade, Leeds,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Locks for Small Arms..
I, THOMAS SOUTHGATE, of 6 Burton Crescent, Euston Road, in the County
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:-
Many arrangements have been employed for the purpose of preventing the
accidental discharge of small arms, especially in double barrelled guns, where
the concussion of the discharge of one barrel often causes the discharge of the
other, and more particularly when the pull is light; but the arrangements have

page_text: never been altogether satisfactory, and it is the object of this invention to effect
this purpose in a more efficient manner than heretofore, rendering tumbler inter-
ceptors unnecessary by locking the scars when in bent at full cock, all as
hereafter described.
According to my invention I employ a locking bolt with spring attached, or
separate therefrom, and a stop block on the plate or other convenient part. In
fitting this safety to a gun-block, the locking bolt is pivotted on the upper
surface of the sear tail, or other convenient part, for example, it may be affixed
to the lock plate, forming its own spring or otherwise.
My invention will be readily understood by reference to the accompanying
drawings, on which are shewn several examples of the constructional arrangement
of my sear locking device.
Figs. 1 to 4 shew the locking bolt, according to my invention, wherein the
said locking bolt is pivotted on the sear tail and acts in conjunction with a stop
block on the plate, Fig. 1 being an elevation of a gun action, parts thereof
being removed in order to shew the right hand lock plate and parts; Fig. 2 is
a sectional pian of same, both lock plates being indicated in this figure. Fig. 3
is a perspective view of the sear locking device shewn at Figs. 1 and 2 in
cocked and locked position, Fig. 4 being a similar view shewing the same
unlocked by the action of the trigger plate and about to be fired. Figs. 5, 6,
and 7 shew the arrangement of the locking device wherein the locking bolt
is affixed to the lock plate, forming its own spring; Fig. 5 being a perspective
view shewing the sear locked, Fig. 6 a similar view shewing the scar released
by the trigger blade, and Fig. 7 the locking bolt detached to illustrate the
formation of the spring therewith.
Figs. 8, 9, and 10, shew the arrangement of the locking device wherein the
locking bolt is affixed and pivoted to the lock plate, and the bolt spring fitted
otherwise than in a piece therewith, Fig. 8 being a perspective view of the sear
locked Fig. 9 being a similar view shewing the scar released by the trigger blade,
and Fig. 10 shewing the locking bolt detached from the lock plate. These perspective
views are drawn on a larger scale than Figs. 1 and 2 in order to clearly illustrate
the locking devices.
Similar letters of reference refer to corresponding parts in the several figures of
the drawings.
At Figs. 1 to 4, the locking bolt A is pivotted at A on the tail B of the sear B',
and is free to be rocked on its centre à convenient distance to block or release
the sear.
A stop-block C is formed or fixed on the inner surface of the lock-
plate D above the sear-tail B, there being a suitable distance between the sear-
tail B and the block C to allow for the pull-off. When the lock is cocked as shewn
at Fig. 1, at the right hand lock plate of Fig. 2, and at Fig. 3, the locking bolt A
is pressed by its spring E into the space between the stop block C and the sear
tail B, thus safely locking and holding the sear nose in the bent of the tumbler F,
Fig. 1, rendering it impossible for the tumbler or hammer to fall until the trigger G
is pulled. The trigger G is formed with a spur or projection G extending upwards
behind the sear tail B, and in contact with the inner or free end of the locking
bolt A this spur G' is sloped in such manner that when the trigger is pulled, the
said slope presses the inner or free end of the locking bolt A forward into the
position shewn in the left hand action Fig. 2 and at Fig. 4, thus 'causing the bolting
end to come backwards out of the space between the stop block C and the sear
tail B, and thus releasing the sear B', and allowing same to be pulled off and the
hammer to fall, the locking bolt A remaining outside, behind the projection C,
until the lock is again cocked, when the space is again filled by the locking bolt A
as before.
I
Where the locking bolt is affixed to the lock plate as at Figs. 5, 6, and 7,
may form the bolt A as. shewn at Fig. 7 with an extension A² and with a
part E, say at right angles thereto; this part E is reduced at E for a portion
of its length, and is inserted in a hole drilled in the thickness of the lock plate D,

page_text: the extreme end of the said part E being secured therein by a screw E' Figs. 5
and 6. A³ is a notch or bent which, when the gun is cocked, as at Fig. 5, takes
over a projection formed on the scar tail B, and is retained in position by the
torsional resiliency of the part E'. Fig. 6 shews the locking bolt A raised by the
trigger G, the sear being thereby released; further motion of the trigger will act
on the sear tail B and cause the gun to be fired.
At Figs. 8, 9, and 10 the locking bolt A is pivotted at A' to the lock plate D,
so that the vertical arm of the bolt A is capable of motion parallel with the
plate D. The pivotting of the lock bolt to the lock plate may be effected in any
convenient manner, but I preferably employ a fixed pin A in the lock plate, onto
which the locking bolt is screwed, so that when in position shewn at Fig. 8, the
bolt A is screwed up on the pin, and when in position shewn at Fig. 9, the bolt A
is slightly unscrewed, and thereby slack motion or looseness of the bolt on the pin
is prevented. E is the spring, in this case secured to the lock plate, and serving
to normally retain the locking bolt in engagement with the sear tail when the scar
is in bent of hammer at full cock. The free end of the locking plate A. is situated
near the sear, and sloped in such manner that the trigger on being pulled presses
the block away from and releases the sear and retains the block in disengagement
while the further motion of the trigger fires the gun.
By locking mechanism according to my invention, the sear becomes automatically
locked when the latter is in the bent of the hammer or tumbler at full cock, and the
sear is released by the motion of the trigger when the latter is pulled to effect the
firing of the gun.
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 :-
1. In small-arms, a locking device for the scars, released or unlocked by the
action of the trigger when the latter is operated to fire the gun, as set forth
2. In sinall-arms, a part A pivoted to the sear, sear tail, or lock plate, and acting
to automatically lock the sear when in bent at full cock, the said part A being removed
from its locking position by the trigger when the latter is operated for firing the
gun, substantially as set forth.
3. In small-arms, the arrangement and construction of sear locking device, acting
substantially as and for the purposes described with special reference to Figs. 1, 2, 3,
and 4 of the accompanying drawings.
4. In small-arms, the arrangement and construction of sear locking device, acting
substantially as and for the purposes herein set forth, with particular reference to
Figs. 5, 6, and 7 of the accompanying drawings.
5. In small-arms, the arrangement and construction of sear locking device acting
substantially as and for the purposes herein set forth, with particular reference to
Figs. 8, 9, and 10 of the accompanying drawings.
ليمر
.
T
1009
BREWER & SON,
London and Leeds, Agents for Applicant.