US2014177A - Box magazine for automatic loading firearms - Google Patents

Description

Sept. l0, 1935. F. HERLACH vET AL l y BOX MAGAZINE FOR AUTOMATIC LOADING' FIREARMS Filed July 27, 1933 LOW `Patented Sept. 10, 1935 titi?? BOX MAGAZINE FUR AUTOMATIC LOADING FIREARMS ration of Switzerland Application July 27, 1933, Serial No. 682,513 In Switzerland .lune 16, 1933 2 Claims. (Cl. Sii-33)v The invention relates to a further modification of the box magazine for automatic-loading rearms described and claimed in our co-pending application Ser. No. 666,598. According to this co-pending application the magazine is provided with a removable upper side or lid, preferably in the form of a hinged lid, so as to permit the insertion of a packet of cartridges, and with a tension lever for returning the spring-controlled feeder to its tensioned position. The invention provides an improvement in the mode of operation of the magazine while the weapon is being fired, and provides in particular means for reducing the friction of the cartridges and feeder in order to ensure in a satisfactory manner the supply of cartridges from the magazine while in operation.

The invention is illustrated in the accompanying drawing which shows by way of example a magazine constructed according to the invention.

Fig. 1 is a perspective view of the magazine in closed condition, attached to the firearm;

Fig. 2 is a similar view showing the magazine open.

Fig. 3 is a longitudinal section with the cover raised, taken on line III-III of Fig. 1; and

Fig. 4 is a cross section taken on line IV-IV of Fig. 3.

The magazine frame or belt 2, the upper side 0f which is constructed as a hinged lid, according to the present invention, has its cartridge supporting plate, which is already provided with openings El and 2i for the removal of empty cartridge clips or for the passage of a feeder-projection 2&3, further cut away to such an extent that narrow retaining strips le (Fig. 2) remain extending longitudinally of the magazine. These then form narrow slide bars on which rest the cartridges of a packet of cartridges inserted in the magazine. By this means the friction of the cartridges thrust forward in their clips by the feeder I6 in the magazine to the interior of the weapon, is so reduced that even in the case of an accumulation of foreign matter no stoppages of the feeding occur and the thrust of the feeder spring 2l is always sufficient to thrust the cartridges along satisfactorily in the direction of the mouth of the magazine. Any dirt which may have found its way in, which on the operation of the magazine is brushed olf the cartridges and the feeder and forced aside, escapes through the openings in the base without having a stopping or jamming effect.

Also, in order to prevent as much as possible the interior of the magazine from becoming dirty,

the lower side of themagazine is advantageously closed by a lid. The latter is integral with the feeder tension lever 26, 28 which for this purpose is broadened out plate-wise. Thus there is provided a lid adapted to pivot about the front or 5 outer magazine pin 29, and having an upturned curved front edge 26 co-operating with the feeder projection E@ which protrudes -at the bottom of the magazine through the slot 2l to return the feeder to the tensioned position. For l0 this purpose the feeder projection it, guided in the slot 2i of the cartridge supporting plate lil, is provided with a roller 25 against which the inside of the curved front edge 26 acts and moves the feeder backwards, when the lid-forming lever 15 253, 25d, is drawn in the opened position (Fig.

2) A spiral spring 25m` in the lug 29 automati-` cally returns the lid-lever 26 and holds it in its initial position as shown in Figs. l and 4.

A spring El is xed and supported in this feeder 20 it by bent members 30 in the latter; pins 3i and 32 fixed to the end plate 3 prevent the outer end of the spring from springing out, when the lever Ii is open.

The end plate 3 is provided with a recess 33 in 25 which, on a bolt 34, a double armed latch 35 is mounted and held by a spring 36 supported against the end plate 3 in its normal position, in which it rests with its surface 3l against the end plate 3 of the magazine. 30

When the feeder it is withdrawn an inclined surface 38 of the projection 243 comes into contact with the projection 39 on the lower arm of the latch 35. The latter is thereby swung downwards against the pressure of its spring 365 and 35 the latch nose 43 releases the cover i l1, which under the action of its spring i5 springs up into the open position .as shown in Figs. 2 and 4. In consequence the projection 39 engages behind the rear shoulder of the inclined surface 38 of the 40 feeder it and holds it thus in the refilling position for the magazine. Then the tensioning lever i6 is released and returns by the spring 29a in the position closing the bottom of the magazine. A cartridge packis lled in the magazine 45 and the cover i i closed. This turns the latch 35, whose projection SS disengages thereby the feeder l which is ready to move the cartridges forward in the weapon.

The main wall position 25a, of the lid is sunk 50 to allow the passage of the feeder projection, and its spacing from the perforated cartridge supporting plate,'permits dirt from the interior of the magazine to pass unhindered through the openings in the said plate. In the normal posi- 55 tion of rest (Fig. 1) the lid with the tension lever 2@ completely closes the bottom of the magazine.

We claimz- 1. A cartridge magazine for firearms comprising a casing removably attached to the iirearm and having an opening for the insertion of a cartridge pack into the casing, a cover for said opening, a cartridge feeder, .a tensioning lever for the feeder, means by which the tensioning lever may be urged to open positionand the feeder in the direction of the rear end of the casing for rei-llling the magazine, and a cartridge supporting plate in the magazine casing,A said plate having openings for the discharge of empty cartridge clips and for guiding the feeder and further openings leaving only narrow strips for supporting the cartridges and the said feeder tensioning lever being Vdesigned as a dust excludingV lid spaced below the supporting plate and closing the bottom of the magazine when the tensioning lever is in its normal position.

2. A cartridge magazine for firearms compris- Y ing a casing removably attached to the firearm and having an opening for the insertion of a cartridge pack into the casing, a cartridge feeder, a tensioning lever for the feeder, means by which the tensioning lever may be urged to Vopen'position and the feeder in the' direction of the rear end of the casing for refilling the magazine, and

aV cartridge supporting plate in the magazine casing, said plate having openings for the discharge of empty cartridge clips and for guiding the feeder and further openings leaving only narrow strips for supporting the vcartridges and the said feeder tensioning lever being designed Vas a dust excluding lid spaced below the supporting plate and closing the bottom of the magazine when the tensioning lever is in its normal position.

FRITZ HERLACH.

THEODOR RAKULA.

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