Improvements in Repeating Fire-arms with Sliding Breech Piece and Box Magazine.
Year: 1888

page_text: COMPLETE SPECIFICATION.
1
Improvements in Repeating Fire-arms with Sliding Breech Piece and
Box Magazine.
I, ADOLPH LINDNER, of No. 8 Jäger Strasse, in the City of Berlin, in the German
Empire, Gentleman, 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 improvements in repeating Fire-arms with sliding breech
piece and box magazine arranged beneath the breech receiver and immediately in
front of the trigger guard. The magazine is constructed according to the accom-
panying drawings to contain four cartridges, but it is evident that the dimensions
of the magazine can be readily altered to receive a greater or less number, said
cartridges being automatically fed into the cartridge chamber in the barrel by the
operation of the sliding breech piece and the mechanism in the magazine.
Fig. 1 is a vertical longitudinal section of my improved fire-arm, the breech parts
in fired off position.
Fig. 2 represents my improved fire-arm partly in elevation and partly in section,
with the breech opened and the sliding breech piece drawn backwards.
Fig. 3 is a top view of Fig. 2 with the knob of the breech piece broken
away.
Fig. 4 is a cross section on the line --x, and
Fig. 5 a cross section on the line y --y in Fig. 1.
Fig. 6 is an elevation of the underside of the sliding breech piece and the cartridge
ejector.
Fig. 7 is a section of the rear part of the breech receiver with the grooves or
recesses for the stud to the breech receiver for taking up a part of the recoil.
Fig. 8 is an elevation of the magazine box for receiving the cartridges.°
Fig. 9 is an end view of Fig. 8.
Fig. 10 is an elevation of the sheet metal or other packing for the cartridges which
serves for the rapid charging of the magazine.
a is the breech receiver or shoe provided with the opening 6 for inserting the
cartridge when the weapon is used as single loader, and with the angular opening
LD037

page_text: or slot c, into which the lever d of the bolt e is guided by the curved surface c', so
that a safe closure of the breech is attained and the cocking of the firing pin is
completed.
The foot of the handle d glides readily along the curved surface c' in closing
the breech, so that a safe closure is attained by the handle being pushed into the
rectangular part c of the slot.
This system of securing the breech against the back pressure of the powder gases
has, however, always been found to have great disadvantages, as the strain on the
bolt is one sided.
Now in order to overcome this disadvantage I provide the bolt with a stud or
projection, which runs in the central groove g of the breech receiver or shoe a and
is guided into a lateral recess in the shoe when the breech is closed by the
handle being pressed firmly into the groove c, as described in an application of like
date.
It will be evident from the foregoing that the bolt or sliding breech piece will,
in this manner, be secured against any back pressure on the bolt resulting from ruptured
cartridges and the like. The bolt is guided in a straight line by means of the
stud or projection f moving in the groove g and the tip of the screw i in the breech
receiver or shoe a, said screw gearing into the groove k of the bolt.
The firing pin m is cocked and the firing spring 1 compressed partially in opening
the breech by means of the hammer n and its curve n2, and is fully cocked when the
breech is closed by the nose n¹ of the hammer n being caught by the nose of the
trigger bolt o. The nose n¹ of the hammer n glides in the groove g of the breech
receiver or shoe a, said hammer being provided with a groove k¹ into which the
screw i of the breech receiver gears when the weapon is discharged, the groove k¹
forming in open position a continuation of the groove k. The forward surface of the
hammer n is a cam shaped surface n', which fits into a rocess e¹ of the bolt e of
corresponding form with the surface n' when the weapon is discharged.
If, on the other hand, the breech is opened and the bolt given a partial revolution,
the hammer n will be caused to assume the position shown in Fig. 2, so that the firing
pin is half cocked for the reason that when the bolt is turned by means of the
handle d, the hammer n is retained by means of the nose n¹, which gears into the
groove g in the breech receiver a and by the screw'i, which gears into the groove k¹
and thus prevented from turning with the bolt.
The spring is full cocked in closing the breech by the nose n striking the trigger
nose o and being prevented from moving forward with the breech piece or holt. If
the trigger is now manipulated, the nose o will be depressed and the spring / released
so that it can impel the firing pin forwards thus exploding the cap and discharging
the cartridge.
The safety arrangement for the fire-arm when the same is at full cock, consists of
a wing or projection n³ by means of which the nose n¹ of the hammer or head n
to the firing pin can be caused to enter into a recess h¹ in the breech receiver and
thus render it impossible to discharge the fire-arm by operating the trigger. The
bolt is provided with a groove in its upper surface for receiving the extractor, and
a groove t in its lower surface for receiving the ejector s. This ejectors can. make
a limited movement in the groove t which is laterally prolonged at its rear end
so as to form the transverse groove t into which a nose u attached to the trigger
spring and moving through a slot in the breech receiver or shoe a gears when the
breech is closed. When the breech is opened and the bolt drawn back the stud or
inferior projection s' of the ejector will strike the nose u so that the ejector is driven
forwards and as the cartridge shell is held at its upper edge by the extractor r
the blow communicated to its lower edge will expel the shell from the breech
receiver as will be well understood by all acquainted with this special branch of
industry.
The box magazine consists of the case or box A, arranged beneath the breech
receiver a and the frame B, Figure 8, the flexible sides of which are somewhat
inclined and bent over at the upper edge. A one armed lever C is pivotted to the

page_text: case A and operated on by the leaf or sear spring D said lever C having the tendency
to press the lever arm E, on which the cartridges rest and which is under the
influence of the spring F upwards, so that the uppermost cartridge will be held in
snug contact with the walls of the frame B which are so formed that the tip of the ball
of the said uppermost cartridge will lay immediately opposite the centre of the
chamber in the barrel whilst the rear end or flange of the said cartridge will
protrude so far beyond the walls of the frame B that when the bolt is pressed
forwards in closing the breech the head of the bolt will catch the cartridge and
force the same into the cartridge chamber in the barrel. When the bolt is drawn
back, the breech opened and the discharged shell ejected, the next cartridge in the
frame B will have been brought up so that when the breech is again closed this
next cartridge will be driven into the cartridge chamber ready for the next
shot.
Instead of loading the cartridges successively into the magazine, the same
may be packed into sheet metal frames G, Figure 10, which can be set into the
opening in the breech receiver a and all the cartridges in the same pressed
simultaneously into the magazine.
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:-
A repeating fire-arm with sliding breech piece or bolt and a box magazine
arranged beneath the breech receiver or shoe, characterised by the following
devices;
1. The device for half cocking the mechanism in opening the breech by means of the
curved surface of the partn² of the head or hammer n to the firing pin which operates
against a like surface on the bolt so that when the breech is opened by turning back
the handle, the hammer n will be retained in the groove in the breech receiver and
prevented from turning so that the spring to the firing pin will be half closed,
substantially as and for the purpose set forth in the foregoing specification and
shown in the accompanying drawings.
2. The device for securing the bolt against prematuro explosion by partly rotating
the hammer or head n of the firing pin so that the nose n¹ enters the recess h¹ in
the breech receiver a, substantially as described in the foregoing specification and
shown in the accompanying drawings.
3. The device for ejecting the empty shell by means of the ejector s which has a
limited movement in the groove and is operated by coming in contact with the
nose projecting from the lower surface of the breech receiver, substantially as
and for the purpose set forth in the foregoing specification and shown in the
accompanying drawings.
4. The box magazine consisting of the case or box A with frame B between
the flexible bent sides of which the cartridge is held in correct position after having
been brought upwards by the action of the levers C and E and the springs D
and F so that when the breech is closed the cartridge will be driven into the
cartridge chamber, substantially as and for the purpose set forth in the foregoing
specification and shown in the accompanying drawings.
Dated this 26th day of November 1888.
ALLISON BROS.,
Agents for the Applicant.