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PATENT SPECIFICATION FOR B.S.A. PUMP-ACTION RIFLE WITH BOX MAGAZINE

PATENT SPECIFICATION
Application Date: July 27, 1922, No, 20,501/ 22, .................204,175
Complete Left: April 27, 1923.
Complete Accepted : Sept, 27, 1923,

PROVISIONAL SPECIFICATION.

Improvements in or relating to Repeating Rifles.

We, B.S.A. GUNS LIMITED, a British company, and GEORGE NORMAN, a British subject, both of Armoury Road, Small Heath, Birmingham, do hereby declare the nature of this invention to be as follows :—
This invention relates to improvements in repeating rifles, and refers more particularly to the kind wherein the opening and closing of the breech mechanism is effected by an action slide mounted on the underside of the gun barrel and provided with a handle or grip part for the manipulation of same, and wherein the cartridges are fed from a magazine and moved into the breech chamber by the breech bolt during its return or closing movement.
The invention has for its object to provide means whereby the action slide is automatically locked when in its forward or outward position and the hammer or striker pin of the firing mechanism has been moved to its cocked or firing position; the said means being intended to prevent the inadvertent opening of the breech mechanism after a cartridge has been loaded into the breech chamber, either from the magazine or by hand.
The invention consists in the employment of a spring controlled catch or lever which is mounted on the axis pin of the hammer or an independent axis pin, and is adapted, when the hammer is in its, cocked or firing position and the action slide is in its forward or outward position, to engage with a notch or recess in the said action slide whereby it is held or locked in such position.
The invention also consists in the provision of means whereby the hammer or striker, when it is released and moves to its fired position, is adapted to move the safety catch or lever clear of engagement with its notch in the action slide, to permit of movement of the latter to effect the opening and closing movement of the breech mechanism.
The invention further consists in the provision of means whereby the safety catch or lever can be moved by hand, when the firing mechanism is in its cocked position, to release same from engagement with the action slide, to permit of movement of the latter to effect the opening of the breech mechanism, when it is desired to remove a live cartridge from the breech chamber of the gun.
According to one mode of carrying our invention into practice, we provide a plate or lever which is pivotally mounted on the sleeve or bush of the hammer axis pin, and is arranged to lie between the side of the said hammer and the inner face of the breech body, the said plate or lever being upwardly inclined and provide at its upper end with a nose part, the outer face of which is radially disposed to the pivot centre of the said lever. By means of a suitable spring the aforesaid lever or catch is normally moved and held in an upward position, and in the underside of the action' slide is formed a notch or recess which is so disposed that when the said slide is in its forward or outward position, the said notch is in alignment with the nose of the catch or lever, and under the action of its spring the nose of the said lever is moved into engagement with the notch in the action slide, whereby the latter is locked or prevented from being moved until the catch has been released.
On the side of the hammer, on which the action slide catch or lever is mounted, and located above the latter, is formed a rib or projection so disposed and arranged that when the hammer is released for firing the gun the said rib comes into contact with the catch or lever and moves its nose out of engagement with the notch or recess in the action slide, thus permitting of the movement of the latter to effect the opening and closing of the breech mechanism and the cocking of the firing mechanism.
When the hammer is again moved by the action slide to its retracted position, the rib or projection thereon is thus moved clear away from the upper side of the catch or lever, and the latter, under the action of the spring, is raised and its nose is brought into engagement with the notch or recess in the action slide, thereby preventing movement of the latter until the gun has again been fired.
The aforesaid safety catch or lever is also provided with a depending arm or limb which is arranged to protrude through a hole or slot in the underside of the breech body, its outer end being shaped and adapted so that it can be readily moved by the shooter’s finger, in order to depress the upper end of the said catch against the action of its spring, and withdraw the nose of same from engagement with the notch in the action slide, to permit of movement of the latter when it is desired to open the breech to extract a live cartridge from the breech chamber.

Dated this 26th day of July, 1922.
ERNEST W. JONES,
Agent for the Applicants.


COMPLETE SPECIFICATION.
Improvements in or relating to Repeating Rifles.


We, B.S.A. Gum LIMITED, a British company, and GEORGE NORMAN, a British subject, both of Armoury Road, Small Heath, Birmingham, 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 relates to improvements in repeating rifles of the kind wherein the opening and closing of the breech mechanism is effected by an action slide mounted on the underside of the gun barrel and provided with a handle or grip for the manipulation of same, also with means whereby the action slide automatically locked in its forward or outward position when the hammer of the firing-mechanism has been moved by the action slide to its cocked or firing position ; the said means being intended to prevent the inadvertent opening of the breech mechanism after a cartridge has been moved into the breech chamber.
It has been proposed in a repeating rifle comprising a movable magazine slideable longitudinally along the underside of the barrel, and provided with an extension in the form of an action slide which serves as a support for the breech to provide a single locking member, mounted on the axis pin of the hammer, which serves to lock the trigger, whilst loading the firearm and also to lock the breech block in its closed position.
The present invention refers more particularly to repeating rifles of the kind wherein a magazine of box type is detachably mounted on the underside of the breech body, and a breech bolt, slideably mounted in a bolt-way is actuated by an action slide mounted on the underside of the barrel.
According to the present invention we provide a simple locking device which is adapted to automatically lock the action slide when in its forward or outward position and the hammer has been moved to its cocked or firing position, characterized by the employment of a spring actuated catch or lever mounted on the bush or axis pin of the hammer, Or an independent axis pin, and located between the one side of the hammer and the inner face of the breech body, the said catch or lever being adapted, when the action slide is in its forward or outward position to engage with a notch or recess in the underside thereof whereby the said slide is held or locked in such position, and on the side of the said hammer is formed a rib or projection which is adapted to engage with the upper side of the said catch or lever when the hammer is released and moves to its fired position whereby the nose part of the said catch is moved from engagement with its notch or recess in the action slide, to permit of the opening of the breech mechanism.
The aforesaid lever or catch is provided with a depending arm or limb arranged to protrude through a slot in the underside of the breech body, to permit of movement of same by hand when the firing mechanism is in its cocked position, and it is desired to remove a live cartridge from the breech chamber of the gun, or to open the gun without pulling the trigger.

Referring to the accompanying drawings in which :—
Figure 1 shows in part sectional elevation the breech end of a repeating rifle constructed in accordance with and embodying the features of this invention, in which the action slide is locked in its forward or outward position, and the hammer of the firing mechanism is in its cocked position ready for firing.
Figure 2 is a similar view to that of Figure 1, but showing the hammer in its fire position and the action slide unlocked to permit of the opening of the breech 15 mechanism.
Figure 3 is a transverse sectional view . taken in line A—B of Figure 2.
Figure 4 shows an end and side elevation of the action slide catch or lever.

Figure 5 shows an end and side elevation of the hammer or striker.

According to one mode of carrying our invention into practice, as illustrated in the drawings, we provide a plate or lever 1 which is pivotally mounted on the sleeve or bush 2 of the hammer axis pin 3, and is arranged to lie between the side of the hammer 4 and the inner face of the breech body 5, the said plate or lever 1 being upwardly and forwardly inclined and provided at its upper end with a nose part 6 the outer face of which is radially disposed to the pivot centre of the said lever. By means of a suitable spring 7, arranged to engage with the underside of the forward part of the aforesaid lever or catch 1 it is normally
moved and held in an upward position, and in the underside of the action slide 40 8 is formed a notch or recess 9 which is so disposed that when the said slide is in its forward or outward position, the said notch is in alignment with the nose part 6 of the catch or lever 1, and under the action of its spring 7 the nose of the said lever is moved into engagement with the notch or recess 9 in the action slide 8, as seen in Figure 1, whereby the latter is locked or prevented from being moved until the said catch has been released.
On the side of the hammer 4, on which the action slide catch or lever 1 is mounted, and located above the latter, is formed a rib or projection 10 so disposed and arranged that when the hammer 4 is released for firing the gun the said rib 10 comes into contact with the upper side of the catch or lever 1 and moves its nose part 6 out of engagement with the notch or recess 9 in the action slide, as seen in Figure 2, thus permitting of the movement of the action slide to effect the opening and closing of the breech and the cocking of the firing mechanism.

When the hammer 4 is "again moved by the action slide 8 to its retracted position, the rib or projection 10 thereon is thus moved clear away from the upper side of the catch or lever 1, and the latter, under the action of the spring 7, is again raised and its nose part 6 is brought into engagement with the notch or recess 9 in the action slide 8, thereby preventing movement of the latter until the gun has again been fired.

The aforesaid safety catch or lever 1 is also provided with a depending arm or limb 11 which is arranged to protrude through a hole or slot 12 in the underside of the breech body 5, its outer end being and adapted to be readily moved by the shooters finger, in order to depress the upper end of the said catch against the action of its spring 7, and withdraw the nose part 6 of same from engagement with the notch or recess 9, in the action slide 8, as seen in dotted lines in Figure 1, to permit of movement of the said action slide when it is desired to open the breech to extract a live cartridge from the breech chamber.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is :—
1. In repeating rifles of the kind herein described, means whereby the action slide is automatically locked when in its forward or outward position and 100 the hammer is moved to its cocked or firing position, characterized by the employment of a spring actuated catch or lever mounted on the bush or axis pin of the hammer, or an independent axis pin, and located between the one side of the hammer and the inner face of the breech body, the said catch or lever being adapted when the action slide is in its forward or outward position to engage with a notch or recess in the underside thereof whereby the said slide is held or locked in such position.
2. In a repeating rifle having the features as claimed in Claim 1, means whereby the safety catch or lever is released from engagement with the action slide, comprising a rib or projection on the side of the hammer or striker which is adapted to engage with the upper side of the said catch or lever when the hammer is released and moves to its fired position, whereby the nose part of the said catch is moved from engagement with its notch or recess in the action slide substantially as described.
3. In a repeating rifle having the features as claimed in Claim 1, means whereby the safety catch or lever can be moved by hand when the firing mechanism is in its cocked position, to release same from its engagement with the action slide to permit of the opening of the breech mechanism, said means comprising a depending arm or limb which is arranged to protrude through a slot in the underside of the breech body, and is adapted to be actuated by the shooter's finger, substantially as described.
4. A repeating rifle provided with an action slide locking device constructed. arranged and operating substantially as described with reference to the accompanying drawing.


Dated this 26th day of April, 1923.
ERNEST W. JONES,
Agent for the Applicants.


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