Year: 1897

page_text: Date of Application, 14th July, 1897
Complete Specification Left, 13th Apr., 1898-Accepted, 14th Oct., 1898
I, AXEL WELIN, of 9, London Street, in the City of London, Mechanical Engineer,
do hereby declare the nature of this invention to be as follows:-
a hollow spindle
The breech block as has before been proposed is pivotted on
projecting from a carrier arm pivotted at the side of the gun the lever operating the
mechanism being pivotted to this arm.
Inside the spindle is a sleeve and inside the sleeve the firing pin. The trigger
is T shaped with its stem parallel to the firing pin and is pivotted in a slot in the
sleeve the pivot being at the junction of the stem and arms of the T. The firing pin
is hollow and contains a helical spring which acts both as the firing and the trigger
spring one end bearing against the forward end of the firing pin and the other end
against one arm of the T shaped trigger the other arm of which is actuated either
directly or through a lever by the firing lanyard. The stem of the T and the firing
pin are each provided with a hook or projection normally engaging with each other
and preventing the firing pin from moving forward until the trigger is turned about
its pivot.
The end of the stem of the T carries a projection which when the breech
block is screwed home is opposite to a recess in the latter but in all other positions
bears against it so preventing the trigger from being turned and the gun fired.
The sleeve has fixed to it at one side an arm baving in it a hole through which the
hinge pin of the operating lever passes so holding the sleeve and firing mechanism in
place but on taking out the pin these can be withdrawn together.
The lever has on it a cylindrical boss surrounding its hinge pin and in this boss is
a recess to receive, when the gun is fired, a roller carried by an arm fixed to the firing
pin. When the lever is turned the roller rides up the inclined side of the recess and
cocks the gun before the breech block is unscrewed.
The rear face of the breech block has around it a circular recess, whose section is
the arc of a circle, to receive the cylindrical boss and in this recess is a cam groove to
receive a roller on a pin projecting radially from the cylindrical boss. As the lever
and boss are turned the roller bearing on the side of the groove turns and unlocks the
breech block.
The first part of the cam groove is horizontal or nearly so and its inclination
afterwards gradually increases so that whilst great leverage is obtained for starting
the block the speed auginents as the block is turned.
There is a spring bolt in the carrier arm which enters recesses in the cylindrical
boss when the breech block is fully home or fully unscrewed and prevents any
accidental movement of the lever but the sides of the recesses and the faces of the end
of the bolt are inclined so that with a little force the lever can be turned pressing
back the bolt.

page_text: I, AXEL WELIN, of 9, London Street, in the City of London, Mechanical Engineer,
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 :-
Figure 1 is a rear elevation and Figure 2 a horizontal section of a gun constructed
according to this invention.
The breech block a as has before been proposed is pivotted on a hollow spindle b
projecting from a carrier arm e pivotted at c¹ to the side of the gun the lever d
operating the mechanism being pivotted at d¹ to this arm, a¹ are divided screws on
the breech block and hollow spindle.
Inside the spindle b is a sleeve e and inside the sleeve the firing pin f. The
trigger g is T shaped with its stem parallel to the firing pin and is pivotted at e¹ in
a slot in the sleeve e the pivot being at the junction of the stem and arins of the T.
The firing pin f is hollow and contains a helical spring which acts both as the firing
and the trigger spring one end bearing against the forward end of the firing pin and
the other end against one arm g¹ of the T shaped trigger g the other arm g² of
which is actuated either directly or through a lever by the firing lanyard. The
stem of the T and the firing pin are provided with hooks or projections g³ and fi
outwardly engaging with each other and preventing the firing pin from moving
forward until the trigger is turned about its pivot. The end of the stem of the T
carries a projection g* which when the breech block is screwed home is opposite to a
recess a² in the latter but in all other positions bears against it so preventing the
trigger from being turned and the gun fired.
The sleeve e has fixed to it at one side an arm e² having in it a hole through
which the hinge pin d¹ of the operating lever d passes so holding the sleeve and
firing mechanism in place but on taking out the pin these can be withdrawn
together.
The lever & bas on it a cylindrical boss d² surrounding its hinge pin and in
this boss is a recess d³ to receive when the gun is fired a roller carried by an
arın ffixed to the firing pin f. When the lever is turned the roller rides up the
inclined side of the recess and cocks the gun before the breech block is unscrewed.
The rear face of the breech block a has around it a circular recess a³ whose section
is the arc of a circle to receive the cylindrical boss d² and in this recess is a cam
groove at to receive a roller d on a pin d5 projecting radially from the cylindrical boss.
As the lever d and boss d2 are turned the roller d bearing on the side of the groove a*
turns and unlocks the breech block.
The first part of the cam groove a is horizontal or nearly so and its inclination
afterwards gradually increases so that whilst great leverage is obtained for starting
the block the speed augments as the block is turned. The travel of the roller also
being inwards towards the axis of the block produces the same effect. Owing to
the form of the cam groove the roller d acts as a bolt locking the breech screw when
closed.
There is a spring bolt i in the carrier arni c which enters recesses d³ and do in the
cylindrical boss d² when the breech block is fully home or fully unscrewed and
prevents any accidental movement of the lever but the sides of the recesses and the
faces of the end of the bolt are inclined so that with a little force the lever can be
turned pressing back the bolt. The bolt has a lug on it which in closing the
breech comes against the side of the gun and withdraws the bolt from the notch d³
and it is then further forced back by the incline d.

page_text: jis the extractor pivotted at j and carrying a roller 72 bearing on a cam surface c³
on the carrier arm c as has before been proposed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the saine is to be performed, I declare that what I
claim is:-
1. The combination of a firing pin, a trigger, a spring pressing the firing pin
forwards and the trigger backwards and hooks or the like on the trigger and firing
pin engaging with each other.
2. The combination with the subject matter of the preceding claim of a recess on
the breech block to receive a projection on the trigger.
3. Firing mechanism substantially as described and shown in the drawings.
4. The combination of the lever shaft the circular recess in the rear of the breech
block, a cam surface in one part and a roller or projection on the other part engaging
with the cam.
5. The combination of a cylindrical boss on the lever shaft a circular recess in the
rear of the breech block, a cam groove in the recess, a projection or roller on the boss
and recesses in the boss to receive a locking bolt and a projection or roller on the
firing pin.
6. The combination of a cam groove in the rear of the breech block and a radially
moving roller actuated by the lever.
7. Quick firing guns substantially as described and shown in the drawings.