U.S. patent number 3,577,860 [Application Number 04/743,158] was granted by the patent office on 1971-05-11 for magazine for firearms.
This patent grant is currently assigned to Heckler & Koch GmbH. Invention is credited to Leopold Jestrabek.
United States Patent |
3,577,860 |
Jestrabek |
May 11, 1971 |
MAGAZINE FOR FIREARMS
Abstract
A magazine consisting of plastic upper and lower components
transversely split in the area of the sidewalls. The upper
component comprises the magazine lips and the lower component
comprises the magazine bottom. The follower spring is a rolled
spring having a wound portion which engages the underside of the
follower and the free end of which is secured to the inside of the
upper magazine component. The magazine components are provided with
relieved teeth for positive engagement at their adjoining ends; the
magazine components may be provided with reinforcements at their
adjoining ends, which serve simultaneously as stops by means of the
magazine bearing against the end of the magazine chamber.
Inventors: |
Jestrabek; Leopold (Oberndorf
(Neckar), DT) |
Assignee: |
Heckler & Koch GmbH
(Oberndorf (Neckar), DT)
|
Family
ID: |
5688382 |
Appl.
No.: |
04/743,158 |
Filed: |
July 8, 1968 |
Foreign Application Priority Data
|
|
|
|
|
May 4, 1968 [DT] |
|
|
P 1703 342 |
|
Current U.S.
Class: |
42/50 |
Current CPC
Class: |
F41A
9/70 (20130101) |
Current International
Class: |
F41A
9/00 (20060101); F41A 9/70 (20060101); F41c
025/02 () |
Field of
Search: |
;42/50--50.2 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Borchelt; Benjamin A.
Assistant Examiner: Jordon; Charles T.
Claims
I claim:
1. A magazine for firearms composed of at least two plastic
components, characterized in that said magazine is transversely
split in the area of the sidewalls thereof, featuring an upper
component and a lower component connected to said upper component,
said upper component comprising magazine lips and said lower
component comprising the magazine bottom, and in that a follower
spring is formed by a rolled spring, the wound portion of which
engages the underside of a follower and the free end of which is
secured to the inside of said upper magazine component near said
magazine lips.
2. A magazine according to claim 1, characterized in that the
magazine components are provided with relieved teeth at the
abutting ends thereof on two mutually opposed sidewalls, said teeth
extending in the plane of said opposed sidewalls beyond the ends
thereof for positive engagement between the teeth of the adjoining
magazine components.
3. A magazine according to claim 2 for firearms with a magazine
chamber which is shorter than the magazine, characterized in that
the magazine components are provided with reinforcements at their
adjoining ends, said reinforcements simultaneously serving as stops
with which the magazine bears against the end of the magazine
chamber.
4. A magazine according to claim 1, characterized in that one or
more magazine components which are open at both ends are inserted
between the upper and lower magazine components.
5. A magazine according to claim 1, characterized in that the free
end of the roller spring is provided with at least one tab which is
bent off at an angle in an outward direction and folded back onto
itself in a U-shaped loop, said tab being engaged by a slot at the
inside of the upper component of the magazine and retained in said
slot by means of a pin.
6. A magazine according to claim 1, characterized in that the
underside of the follower, approximately at the center of said
follower, is provided with a transverse web extending substantially
at a right angle to the axis of the rolled spring, with which said
follower rests on the wound portion of the rolled spring.
7. A magazine according to claim 1, characterized in that the
follower, at one of its edges, is provided with a projection, with
which said follower, in its uppermost position, strikes against a
shoulder of the upper component of the magazine before making
contact with the magazine lips.
8. A magazine according to claim 2, characterized in that the
bottom of the lower magazine component has a semicircular
cross-sectional contour.
Description
The present invention relates to a magazine for firearms which is
composed of two plastic components.
A magazine made of plastic, which consists of two half shells, each
providing one sidewall and one lip of the magazine, is known from
the German application No. 1,080,002. Adjacent to the sidewalls of
the shells, webs are disposed which butt against each other and
jointly form the narrow side and the bottom of the magazine.
Although the half shells of these magazines may be produced with
relative ease by casting or molding, assembling these components
undoubtedly presents considerable difficulties since the follower
and the follower spring must be installed in the half shells before
the latter are joined. It is by no means obvious how the devices
would have to be designed which would enable the follower and the
follower spring to be inserted, in a preloaded condition, into one
half shell and then the second half shell to be joined to the first
one. As a matter of fact, plastic magazines have not as yet found
widespread acceptance in practice.
Furthermore, a method is known by which the magazine casing is
formed in a single piece and provided with a bottom plate. It is
obvious that this method is restricted to the production of
relatively short magazines because of the difficulties that would
appear to be involved in molding or casting relatively long
magazine casings in a single piece. In addition, fitting a bottom
to such a casing would appear to involve considerably greater
difficulties than fitting a similar bottom to a sheet metal casing
and, above all, call for quite bulky strips or other members
providing positive engagement for retaining the covering plate.
Such members are not only expensive to provide but also very
inconvenient in handling the magazine and especially for storing
and keeping it in pouches or the like.
It is the object of this invention to avoid these disadvantages of
the known plastic magazines and to provide a magazine which is both
easy to produce and convenient to handle.
According to the invention this objective is accomplished by
providing a magazine which is transversely split in the area of its
sidewalls, featuring an upper component and a lower component
connected to said upper component, said upper component comprising
the magazine lips and said lower component comprising the magazine
bottom, and in which the follower spring takes the form of a rolled
spring the wound portion of which engages the underside of the
follower and the free end of which is secured to the inside of the
upper magazine component near the magazine lips.
Dividing the magazine along a transverse plane between the bottom
and the magazine lips enables the components which are to be made
of plastic to be kept comparatively short even for magazines of
larger sizes so that these components may be manufactured in a
simple manner. Furthermore, the individual components are easily
combined since the follower and the follower spring, which takes
the form of a rolled spring, may be installed in the upper
component of the magazine before the lower magazine component is
fastened and because said follower and said spring will be entirely
accommodated in the upper component after the magazine has been
assembled so that the lower magazine component may be fitted
without any interference from the follower and the follower spring
and entirely free from any forces. Furthermore, there is no need of
providing the magazine with any projections extending beyond its
walls, so that it may be stacked with ease and conveniently
inserted into pouches or the like.
The fact that the lower magazine component may be fitted without
giving any consideration to the follower and the follower spring
enables the magazine components, in a further embodiment of the
invention, to be provided with relieved teeth for positive
engagement at their adjoining ends, preferably in the area of their
sidewalls. Since the magazine components may be freely displaced in
relation to each other, including in a direction perpendicular to
the sidewalls, said relieved teeth may be readily brought into
engagement with each other. The use of such teeth offers the
particular advantage that no fixtures of any kind are required for
keeping the magazine components together during manufacture, for
example when said components are to be joined by an adhesive bond.
Instead of an adhesive bond pins or the like may be used
alternatively in order to provide a safe connection.
If the magazine is intended for firearms with a magazine chamber
which is shorter than the magazine, the magazine components may be
provided with reinforcements at their adjoining ends, said
reinforcements simultaneously serving as stops by means of which
the magazine bears against the end of the magazine chamber. These
reinforcements simultaneously provide a particularly stable
connection so that the walls of the magazine components may be kept
particularly thin. In addition, one or more magazine components
open at both ends may be inserted between the upper and lower
components in order to obtain magazines of great length.
In a preferred embodiment of the invention the free end of the
rolled spring is provided with at least one tab, bent off at an
angle in an outward direction and folded back onto itself in a
U-shaped loop, which is engaged by a slot on the inside of the
upper part of the casing and retained in said slot by means of a
pin. This ensures a particularly simple and, at the same time, very
safe attachment of the end of the rolled spring. Furthermore, the
follower may be provided with a transverse web disposed
approximately at the center of its underside, with which it rests
on the wound portion of the rolled spring, so that it will be
uniformly loaded at all times, irrespective of the angular position
which it assumes owing to the shape of the cartridges in the
magazine. In addition, the follower may be provided with a
projection at one of its edges with which the follower, in its
uppermost position, strikes against a shoulder of the upper part of
the casing before making contact with the magazine lips, so that
the magazine lips, which are made of plastic, are relieved from the
resulting load and thus cannot be deformed or forced outward by the
impact of the follower at the end of its upward movement. The
projection also prevents the follower from interfering with the
breech mechanism and from being damaged by the latter.
Further details and embodiments of the invention will become
apparent from the following specification, in which the invention
will be described and explained in greater detail, reference being
made to the embodiment shown by way of example in the accompanying
drawing. In other embodiments of the invention, the features
apparent from the specification and the drawing may be applied
separately or in any desired combination. In the accompanying
drawing
FIG. 1 is partially a side elevation and partially a section of a
magazine according to the invention,
FIG. 2 is a top view of the magazine according to FIG. 1,
FIG. 3 is a view of the magazine according to FIG. 1 in the
direction of the arrow III, and
FIG. 4 is a section through the lower component of the magazine
according to FIG. 1 completely filled with cartridges.
The magazine shown in the drawing consists of three components 1,
2, and 3, which contact each other in planes 5 and 6 extending in
transverse relation to the longitudinal direction of the magazine
i.e. parallel to the magazine lips 4. The upper component 1 is part
of the chamber accommodating the cartridges 7, and is provided with
the magazine lips 4 at its outer end. The lower component 3
essentially constitutes the bottom part with a semicircular
cross-sectional contour 8 (see FIG. 3) provided with sections
forming a transition to the walls of the magazine. Between the
upper component 1 and the lower component 3 there is a central
component 2, which is open at both ends. It is obvious that such a
central component 2 may be omitted and that the height of the
bottom component 3 and/or the upper magazine component may be
increased, if necessary, and that, on the other hand, more than one
magazine component with two open ends may be inserted between the
upper and the lower magazine components.
In order to provide a safe connection between the magazine
components, the magazine components 1 to 3 are provided with
relieved teeth 9 of approximately dovetail shape at their adjoining
ends in the area of the sidewalls. In the area of the narrow sides
between the sidewalls, on the other hand, the separations extend
along a straight, continuous line as clearly shown in FIG. 3, so
that the magazine components may be easily assembled by sliding
them in the direction of the separating planes 5 and 6. Connection
between the magazine components 1 to 3 may be effected, for
example, by means of an adhesive bond or by welding or by some
mechanical arrangement, for example with the aid of pins.
Especially where the location of the magazine components with
relation to each other is fixed by means of pins, it is advisable
to provide only one separation and to dispose this separation in
the area of the magazine chamber, unless the magazine chamber of
the firearm accommodates the magazine on its entire length. On the
other hand, the separation may also be disposed outside the
magazine chamber in close proximity to its edge and provide it with
reinforcements serving as stops to limit the length on which the
magazine may be inserted into the magazine chamber. This embodiment
offers the advantage that there is no need of providing separate
stops and that, at the same time, the magazine may be constructed
with very thin walls, since the reinforcements ensure a stable
connection.
The drawing shows that in the magazine according to the invention
the spring loading the follower 11 takes the form of a rolled
spring 12, the wound portion of which engages the underside of the
follower 11 and the free end 13 of which is secured to the inside
of the upper magazine component 1 near the magazine lips 4, as is
clearly shown in FIG. 3. It will be noted that at its free end the
rolled spring is provided with a tab 14, bent off at an angle in an
outward direction and folded back onto itself in a U-shaped loop,
which is engaged by a transverse slot 15 on the inside of the upper
component 1 of the casing and retained in said slot by means of a
pin 16 inserted into corresponding holes in the casing wall from
one of the narrow sides. Furthermore, the sidewall of the magazine
components with which the unwound end 13 of the rolled spring is in
contact is provided with a longitudinal slot 17 for receiving said
end. With the magazine completely filled the wound portion of the
rolled spring 12 is situated within the bottom component 3 as shown
in FIG. 4.
As may be noted from FIG. 4, the follower 11, in its lowermost
position, is disposed at a substantial angle owing to the slight
taper of the cartridges 7. This angle decreases as the follower
approaches the magazine lips 4. The follower 11 thus goes through a
tilting motion on its way from the lowermost to the uppermost
position. To ensure a proper transmission of forces from the rolled
spring 12 to the follower irrespective of its inclination, the
underside of the follower is provided with a transverse web 18,
with which the follower rests on the wound portion of the rolled
spring. The height of the web 18 is such that the follower 11 may
perform the necessary tilting motion with relation to the wound
portion of the rolled spring 12 without any hindrance. In addition,
one edge of the follower is provided with an upward curved
projection 19, which strikes against a shoulder 20 of the upper
component 1 of the casing before the follower makes contact with
the magazine lips 4. The shoulder 20 is formed by a curved
projection at the sidewall of the upper magazine component 1
adjacent to the projection 19 on the follower 11. This arrangement
prevents the follower from striking against, and damaging, the
magazine lips after the final cartridge has been fired, and
furthermore prevents the follower itself from interfering with the
breech mechanism of the firearm and from being damaged by the
breech. It is, therefore, possible to use a plastic follower
produced by casting or molding.
If the magazine is intended for firearms with a magazine chamber
that is shorter than the magazine, the magazine components 1, 2, 3
may be provided with reinforcements 21 at their adjoining ends,
which reinforcements simultaneously serve as stops by means of
which the magazine bears against the end of the magazine chamber.
In addition, these reinforcements provide a particularly stable
connection so that the walls of the magazine components 1, 2, 3 may
be kept particularly thin.
From the above, it is apparent that the invention provides a
plastic magazine which combines great simplicity of design with
particular ease of production, not only because the various
components are easy to manufacture, but also because the magazine
may be assembled in a particularly simple manner. It is a special
advantage that the components of the magazine may be combined
together without any interference from the load applied by the
follower spring.
It shall be understood that the invention is not restricted to the
embodiment shown by way of example and that deviations therefrom
are possible without exceeding the scope of the invention. As
explained above, any desired number of magazine components may be
combined into a unit, and the wall sections of the upper as well as
the lower magazine components may have any desired length. In
particular, magazines of different capacities may be produced for
the most varied applications with the aid of one upper and one
lower standard component by inserting intermediate components.
* * * * *