U.S. patent number 3,808,723 [Application Number 05/319,395] was granted by the patent office on 1974-05-07 for cartridge magazine for power tools.
This patent grant is currently assigned to Gunnebo Bruks Aktiebolag. Invention is credited to Karl Erich Samuel Erixon.
United States Patent |
3,808,723 |
Erixon |
May 7, 1974 |
CARTRIDGE MAGAZINE FOR POWER TOOLS
Abstract
A cartridge magazine for power tools by virtue of which the
loading of the tool with a cartridge is semi-automated and a great
number of such cartridges are stored in this magazine in readiness
for a rapid reloading of the tool. The cartridges are contained
behind one another in a channel and the part constituting the
channel is tiltable between two end positions, in one of which the
channel communicates with a cartridge chamber in the inner end of
the barrel of the tool.
Inventors: |
Erixon; Karl Erich Samuel
(Huskvarna, SW) |
Assignee: |
Gunnebo Bruks Aktiebolag
(Gunnebobruk, SW)
|
Family
ID: |
20263868 |
Appl.
No.: |
05/319,395 |
Filed: |
December 29, 1972 |
Foreign Application Priority Data
Current U.S.
Class: |
42/6; 42/49.01;
42/87; 124/50; 124/82 |
Current CPC
Class: |
F41A
9/38 (20130101); B25C 1/186 (20130101) |
Current International
Class: |
F41A
9/00 (20060101); B25C 1/18 (20060101); B25C
1/00 (20060101); F41A 9/38 (20060101); F41c
025/00 () |
Field of
Search: |
;42/49R,6,87,88,1R
;227/9-11 ;124/48-50,52,53 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Feinberg; Samuel
Assistant Examiner: Jordan; C. T.
Attorney, Agent or Firm: Holman & Stern
Claims
What is claimed is:
1. A cartridge magazine for loading cartridges into a cartridge
chamber disposed in an inner end of a barrel of a power tool, said
magazine being adapted to be fixed on the outside of the tool in a
holder means and being provided with at least one channel in which
the cartridges are contained in series behind one another, wherein
at least the part of the magazine which constitutes the channel is
tiltable between two end positions, and that in one of said
positions the channel communicates with the cartridge chamber of
the tool to effect loading thereof.
2. Cartridge magazine in accordance with claim 1, wherein the
holder means is provided with an elastic device which acts upon the
tiltable part of the magazine in the direction of the cartridge
chamber.
3. Cartridge magazine in accordance with claim 1, wherein the
channel is formed by a tube, open at the end towards the cartridge
chamber, and wherein a cap is provided to close the other end of
the tube.
4. Cartridge magazine in accordance with claim 3, wherein the tube
forms a weak S-bend.
5. Cartridge magazine in accordance with claim 1 including a
multitude of channels lying next to one another in a rotatable drum
inside a casing and provided with a connecting channel to the
cartridge chamber.
6. Cartridge magazine in accordance with claim 5, wherein the
connecting channel is formed by a weakly S-bent tube disposed
between the casing and the cartridge chamber.
7. Cartridge magazine in accordance with claim 6, wherein the tube
is pivoted to the casing and held in raised position by a
spring.
8. Cartridge magazine in accordance with claim 5, wherein the drum
is mounted between two sides of the casing which is mounted
tiltable in said holder means and that the connecting channel is
constituted of a hole in a side of said casing towards the
cartridge chamber.
9. Cartridge chamber in accordance with claim 3, wherein the tube
is fixed in a body provided with a catch device in the form of a
springy stop which is normally pushed over the open end of the
tube.
10. Cartridge magazine in accordance with claim 3, wherein a
helical spring is provided in the tube which pushes the cartridges
in the tube in a direction from the cap forwards.
11. Cartridge magazine in accordance with claim 5, wherein the drum
is provided with recesses, one for every channel, and that a catch
is provided in the casing to snap into such a recess, the catch,
the recess and the inlet end of the connecting channel being
positioned in relation to each other so that the catch snaps into a
recess when the corresponding channel faces the inlet end of the
connecting channel.
Description
The present invention relates to a magazine for cartridges which is
used in power tools and constitutes a means for simplifying the
reloading of the tool.
BACKGROUND OF THE INVENTION
In most shooting implements the loading procedure is cumbersome and
time-consuming, since both pin or bolt and propellant charge has to
be applied in the implement, before it is ready for shooting.
Certain attempts have been made earlier to automate parts of the
procedure, but as a consequence the implement became complicated
and expensive to manufacture. If the demand for automation of the
procedure is not higher than that certain manipulations might be
forestalled, a cheap and simple device can nevertheless achieve a
considerable simplification of the procedure.
SUMMARY OF THE INVENTION
In accordance with the present invention a device on a cartridge
magazine is presented, by virtue of which the loading of the tool
with a propellant charge is semi-automated and a great number of
such charges are stored in this magazine in readiness for a rapid
reloading of the tool. The magazine is arranged so that it can
readily be exchanged in a holder on the tool and by using several
magazines a rapid and simple loading is made possible without the
loss of time brought about by the filling up of the magazine. These
advantages, and possibly also others are obtained in accordance
with the invention by a design of a cartridge magazine in which the
cartridges are contained behind one another in a channel and the
part of the magazine which constitutes the channel is tiltable
between two end positions, in one of these the channel communicates
with a cartridge chamber arranged in the tool in the inner end of
the barrel of the tool.
BRIEF DESCRIPTION OF THE DRAWINGS
Some examples of the realization of the magazine in accordance with
the invention are described in the following with reference to the
enclosed drawing, which shows in
FIG. 1 a tubular magazine with holder on a power tool;
FIG. 2 a drum magazine intended for the same holder as the magazine
in FIG. 1;
FIG. 3 a variant of a drum magazine together with holder for the
same;
FIG. 4 the holder for the magazine in FIG. 3;
FIGS. 5 and 6 a locking and guiding device for one of the
magazines;
FIG. 7 a drum magazine with a pivoted loading tube.
DETAILED DESCRIPTION OF THE DRAWINGS
On the drawing is shown a power tool which is operated with
cartridges 2 which are introduced into the cartridge chamber 3 one
by one and fired. The tool is intended originally to be loaded with
one cartridge directly into the cartridge chamber, to be closed and
fired, whereupon the loading procedure is repeated. This longwinded
procedure which comprises taking the cartridges one by one from a
box or the like and inserting them into the cartridge chamber, is
eliminated by arranging a cartridge magazine 4, 5 or 6, placed in
FIG. 1 on top of the tool and in FIGS. 3 and 4 at the side of the
same. The drawings also indicate that the tool must have a special
design to allow the employment of such a cartridge magazine. The
tool is shown in pulled out condition, that is to say its barrel 7
with driving piston inside it has been pulled out of the body 8 of
the tool to a loading position, the cartridge chamber 3 being laid
bare in a loading opening 9 in the body.
The solution in principle of the problem to contrive a cartridge
magazine in accordance with the invention will now be shown and
described in connectioon with FIG. 1. Above the rear portion of the
body 8 a holder 10 is fixed which has a transverse axle 11 which
carries the tubular cartridge magazine 4. This is provided on the
underside with a transverse notch 12 (FIG. 2) in which there is a
spring catch, so that the magazine can be mounted on the axle 11
and be maintained on the same by means of the notch and the catch.
In the holder 10 is also a spring 13 which presses on the magazine,
so that the same is maintained in raised position (broken lines in
FIG. 1). At the rear end of the magazine is a screw cap 14 which
covers the rear opening of the magazine. When the cap is removed
cartridges 2 can be filled in through this opening.
The loading of the tool with a cartridge 2 takes place in such a
way, that the barrel 7 is pulled into the loading position (shown)
and the front end of the magazine is pressed down by hand into the
loading position at the same time as the tool is inclined somewhat
forwards. The cartridges will then under their own weight fall
downwards/forwards in the magazine and the frontmost cartridge
enters into the cartridge chamber 3. The magazine is then raised
again into the position shown in broken lines by the spring 13, but
not higher than that the cartridges in the tube are prevented by
the front wall 15 in the loading opening from falling out. The tool
is then closed up and after pushing a pin into its mouthpiece 16 it
is ready for shooting. A tubular magazine of the type as shown in
FIG. 1 holds about 15 cartridges and, as mentioned earlier, can
readily be filled up when required.
A substantially increased space for cartridges is obtained by
realizing the magazine in accordance with FIG. 2. This realization
has the shape of a drum 17, comprising a number of axial channels
18 accomodating the cartridges 2. The drum is located in a housing
19 from which extends a tube 20 in a forward direction. Underneath
the housing is a socket 21 for the holder 10. The drum can be
rotated inside the housing and has defined angular positions which
each correspond to a connection of any one of the channels 18 to
the tube 20. The cartridges in the channel connected are then able
to drop through the tube towards the cartridge chamber 3, when the
magazine is mounted on the tool. The drum can be extracted from the
tool and either be filled up again with new cartridges or be
substituted by a full magazine. The loading procedure for the rest
is the same as that described above in connection with the magazine
in accordance with FIG. 1.
The design of the body with loading opening as shown on the drawing
also allows the arrangement of a cartridge magazine 6 at one side
of the loading opening, such as shown in FIGS. 3 and 4. This
magazine consists of a drum 22, supported in a bracket 23, which in
its turn is set up in a holder 24 on the tool. The bracket is
mounted on the holder so that it can be folded down and extend in
collapsed position into the loading opening, while it is normally
held in the position as shown by a helical spring 25. In the front
part of the bracket is a hole 26 to which can be connected every
one of the channels 18 by rotation of the drum. The cartridges in
the channel connected to the hole can then fall forwards towards
the cartridge chamber 3, when the magazine is held in folded down
position. In raised position (shown) the cartridges are held in
position in the channel, since the hole 26 is then covered by the
front wall 15, as mentioned before in respect of the magazine 4 and
5. The drum 22 can be removed from the bracket by pulling the same
a little apart, so that a pivot 27 projecting on the drum can slide
out of the hole 28 in the bracket where it is journalled. A drum
filled with cartridges is put in position by pulling the bracket
away, so that a pivot 27 in each end of the drum can slide into the
corresponding hole 28 in the bracket, whereupon the pivots thanks
to the restoring spring force in the bracket, are retained in the
holes.
The use of the magazine 6 is fully analogous to that described
previously in connection with magazines 4 and 5, that is to say,
the tool is loaded by pulling out the barrel to the position shown,
inclining the tool forwards, folding the magazine down into the
loading opening, so that a cartridge has the opportunity of
dropping into the cartridge chamber and, after the magazine has
reverted to its normal position, the barrel is pushed back in
again.
A device apt to facilitate still further the loading procedure is
shown in FIGS. 5 and 6. In FIG. 5 the device is shown in rest
position and in FIG. 6 in loading position. The cartridge tube 4 is
the same as shown in FIG. 1, except that it has been provided in
this embodiment with a locking and controlling device, by means of
which the centering of the magazine in loading position takes
place, and the cartridges are retained when the magazine is in rest
position. As can be seen from FIGS. 5, 6 the magazine has a body 29
with a holder 30, fixed on an axle on the upper side of the tool.
Between the body and the tube 4 a leaf spring 31 is inserted with
forward tension. Its front end has a double band 32 and the bottom
part of this is located in rest position (FIG. 5), thanks to the
clamping of the spring, in front of the mouth of the tube, thus
preventing the cartridges 2 from dropping out of the tube.
In loading position (FIG. 6) the spring and the front end of the
body constitute a guiding device for the tube. This device is
suitable for tools which have a cartridge chamber somewhat drawn
back from the barrel, such as shown in FIG. 6. The cartridge
chamber is located in a plug 33 in the rear end of the barrel and
against this plug rest the body and the spring in loading position,
so that the mouth of the tube is centered exactly opposite the
cartridge chamber. The cartridges with which the tool is loaded can
then drop freely into the cartridge chamber.
A still further embodiment of a magazine according to the invention
is shown in FIG. 7. On the rear portion of the tool a housing 34 is
fastened and its inner cylindrical spacing is adapted to accomodate
a drum 17 provided with axial channels as described with reference
to FIG. 2. The drum can be rotated in the housing, and a spring
ball 35 snaps into recesses 36 in the periphery of the drum, when
anyone of the channels 18 faces the tube 20, which connects the
channel and the cartridge chamber. This tube is pivoted at the
front end of the housing by means of a pin 37, which penetrates a
lug 38 projecting on the underside of the tube. The tube is usually
kept in a raised position by means of a spring 39 secured to the
front end of the housing and acting on a knob 40 on the topside of
the tube. The front end of the tube can, against the force of this
spring, be pushed down to the cartridge chamber, when loading takes
place.
The embodiments of the invention described above are preferred
realizations. Other realizations and additional devices may however
come within the scope of the invention, e.g., handles, catches etc.
for facilitating the taking in and out of the magazine or the
loading movement itself. The tube may also include a spring for the
pushing forward of the cartridges. The invention is defined in its
entirety in the following claims.
* * * * *