Plastic magazine for cartridges for firearms

Sept. 3, 1968

C. E. ROWE, JR

3,399,480

PLASTIC MAGAZINE FOR CARTRIDGES FOR FIREARMS

Filed Aug. 24, 1966

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3,399,480

Patented Sept. 3, 1968

United States Patent Office

3,399,480 PLASTIC MAGAZINE FOR CARTRIDGES FOR FIREARMS

Charles Edward Rowe, Jr., Templeton, Mass. (% Barring- _gton &amp; Richardson, Inc., Park Ave., Worcester, Mass.

01608)

Filed Aug. 24, 1966, Ser. No. 574,741

Claim. (CI. 42—50)

ABSTRACT OF THE DISCLOSURE

A plastic magazine for cartridges for firearms including a cartridge follower and a cartridge follower spring, wherein there is provided a throat for the passage of 15 cartridges from a staggered relationship in the lower portion of the magazine to a single-line relationship adjacent to the magazine exit lips for the easier and smoother flow seriatim of cartridges from staggered relationship into the breech of the firearm, wherein the ribs are 20 low in the staggered areas to provide enough room for staggered cartridges and are high in the throat area, said ribs between the high and the low areas being formed on a convexo-concave curve providing for an improved easy and smooth flow for the cartridges. 25

This invention relates to an ..improvement in plastic magazines for cartridges for firearms. Such magazines can be made so inexpensively as to be thrown away and not recovered particularly under conditions of battle but also even under conditions of practice.

Prior attempts to produce plastic magazines of this nature have failed due to the fact that the cartridges are θ_ staggered in the magazine in order to provide a container for as many as possible, and when the cartridges arrive at the position of the magazine lips to be picked up by the firing mechanism such as the bolt, they tend to spread the sides of a plastic container although the ₄θ usual metal container is not subject to this fault.

Therefore it is the principal object of the present invention to provide means for preventing such spread and also guiding the cartridges to rise smoothly from the staggered relationship into a single-line relationship in _4gposition to be picked up by the firing mechanism of the firearm. This is done by providing a guide construction in the magazine so that the cartridges can be loaded in staggered relationship, but when arriving at the positioning lips of the magazines smoothly flow into a single line ₅₀relationship which provides for correct positioning of the cartridges as aforesaid; and the provision of such guides which are in the form of internal ribs for the magazine strengthening the walls thereof and preventing deflection.

Other objects and advantages of the invention will 55 appear hereinafter.

Reference is to be had to the accompanying drawings in which:

FIG. 1 is a top plan view illustrating the new magazine;

FIG. 2 is an exploded view in perspective showing θθ the parts which are secured together to form the magazine;

FIG. 3 is a vertical section through the magazine showing the relationship of the cartridges thereto;

FIGS. 4 and 5 are similar views with parts broken away ₆₅illustrating modifications, and

FIG. 6 is a plan view illustrating a flat follower plate which may be used with the present plastic magazine.

The construction of the magazine may be such that two parts are molded separately in single pieces as shown 70 at 10 and 12, these parts being secured together as by cementing to complete the magazine after however inserting the follower 14, FIG. 6, and the follower plate spring 16 as shown in FIG. 3.

Each of the parts 10 and 12 is complete in and of itself including peripheral side flanges as at 18 for instance and also bottom flanges 20 to complete the magazine when the parts are secured together. This is illustrative only however as the article can be made in any way which may be found to be desirable or convenient.

The essential characteristics of the new magazine reside in the formation of ribs which are generally indicated at 22 and 24. These ribs may extend the entire length of the magazine parts 10 and 12 and thereby form strengthening ribs. The follower plate has notches 26, 26 to accommodate these ribs and it moves freely up and down as usual.

At the upper or open end of the magazine adjacent the lips 28, the ribs 22 and 24 converge inwardly as at 30, 32 terminating in a guide passage limiting the cartridges as they rise from their staggered position illustrated at 34 in FIG. 3 for instance to a single-line position as at 36. This position is in line with the bolt or other carrying mechanism of the firearm.

Not only do the convergent areas at 30 and 32 guide the cartridges in the single line formation but they also add extra stiffness adjacent the lips 28, 28 and this is exactly the area where such extra stiffness is desirable inasmuch as the cartridges tend to distort the magazine walls where they change from their staggered position at 34 to the single line position. This is prevented by the guide ribs of the present construction.

As shown in FIGS. 4 and 5, the invention can be modified in such a way as to provide for positioning of the cartridges either left-hand or right-hand with respect to the magazine, required by the firing mechanism of certain firearms. In order to do this, the lips at 40 are Jocoated to one side of a central plane of the magazine and a rib such as at 42 extending the length of the magazine wall 44 has a surface as at 46 which curves inwardly toward the opposite wall 48 of the magazine. Wall 48 may also be provided with stiffening grooves if this should be found to be desirable but the effect of the widened portion 50 of rib 42 is to align the staggered cartridges at 52 into single-line formation at 54 for the purpose described above, and which will be clear to those skilled in the art.

FIG. 5 shows the opposite conformation where.it is desired to feed the cartridges in a right-hand position, the lips of the magazine at 52 being located at the righthand side thereof and the rib 54 being located on the left-hand wall of the magazine, and having the inclined surface 56 which is equivalent to that at 46.

The notches 26 and the follower plate 14 are preferably of a depth so that they can accommodate the enlarged portions of the ribs and in fact the follower must be capable of rising to such an extent as to place the final cartridge in the position 36 of FIG. 3 or 54 of FIG. 4.