U.S. patent number 3,849,925 [Application Number 05/362,097] was granted by the patent office on 1974-11-26 for repeater gun, especially rifle.
Invention is credited to Klaus K. Mayer.
United States Patent |
3,849,925 |
Mayer |
November 26, 1974 |
REPEATER GUN, ESPECIALLY RIFLE
Abstract
In order to use different caliber shells or cartridges in a gun,
especially a rifle, the barrel is exchangeable against another
barrel of different caliber by means of an intermediate coupling
member in the form of a hollow cylinder, one end of which is
provided with means for locking the barrel end to the coupling
member and the other end of which is provided with means for
removably securing the coupling member in the housing of the breech
mechanism.
Inventors: |
Mayer; Klaus K. (576
Neheim-Huesten, DT) |
Family
ID: |
25763321 |
Appl.
No.: |
05/362,097 |
Filed: |
May 21, 1973 |
Current U.S.
Class: |
42/75.02 |
Current CPC
Class: |
F41A
21/482 (20130101) |
Current International
Class: |
F41A
21/48 (20060101); F41A 21/00 (20060101); F41c
021/00 () |
Field of
Search: |
;42/75B |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Borchelt; Benjamin A.
Assistant Examiner: Jordan; C. T.
Attorney, Agent or Firm: Fasse; Wolfgang G. Roberts; Willard
W.
Claims
What is claimed is:
1. In a repeater gun with exchangeable barrels having threaded ends
attachable to a breech mechanism including a forwardly open breech
housing having a retaining shoulder at its rear end, the
improvement comprising a hollow cylinder coupling member having a
barrel end and a rear end inserted into said breech housing with
said coupling member rear end resting against said retaining
shoulder, means for locating and securing said cylinder coupling
member in said breech housing, said cylinder coupling member
further comprising a front portion adjacent to said barrel end, an
intermediate portion, and a rear portion adjacent to said rear end,
and a circumferential inner shoulder of given inner diameter
separating said front portion from said intermediate portion of the
coupling member, as well as further shoulder means separating said
intermediate portion from said rear portion and having an inner
diameter smaller than said given inner diameter, said coupling
member further comprising an inner threading inside said front
portion whereby a threaded barrel end screwed into said inner
threading rests against said circumferential inner shoulder of the
coupling member and simultaneously forms with said further shoulder
means and with said intermediate portion a bolt head receiving
space.
2. The repeater gun according to claim 1, wherein said breech
mechanism comprises a bolt head having a locking shoulder, said
further shoulder means of said coupling member engaging said
locking shoulder of said bolt head in its firing position in said
bolt head receiving space in said breech housing.
3. The repeater gun according to claim 1, wherein said means for
locating and securing said cylinder coupling member in said breech
housing comprise an outwardly extending stud on said coupling
member, said breech housing having a slot therein for receiving
said stud of the coupling member.
4. The repeater gun according to claim 3, wherein said stud
comprises means for connecting the stud to the breech housing.
5. The repeater gun according to claim 4, wherein said connecting
means comprise a pin receiving hole in the stud and a locking pin
extending through said hole and into locking contact with said
breech housing.
6. The repeater gun according to claim 1, wherein said breech
housing comprises a cylindrical chamber for receiving said hollow
cylinder coupling member, said breech housing further comprising a
longitudinal slot, and chucking means as part of said breech
housing for clamping said coupling member in said breech
housing.
7. The repeater gun according to claim 6, wherein said chucking
means comprise a screw extending through said breech housing
adjacent to said longitudinal slot.
8. The repeater gun according to claim 1, wherein said barrel end
is provided with a shoulder which rests against said barrel end of
said coupling member.
Description
BACKGROUND OF THE INVENTION
The present invention relates to repeater guns, especially rifles,
that is, single barrel hunting guns in which the loading is
accomplished by pulling back the breech lock member and then
pushing the same forward again. For this purpose the breech bolt is
rotated to an unlocked position prior to its forward and rearward
movement as is well known in the art. Due to this movement of the
breech lock a cartridge or shell is moved from the magazine into
the cartridge or shell chamber of the barrel. Simultaneously, the
breech lock is locked in the breech mechanism.
In conventional hunting guns of this type, especially in those
comprising a cylinder breech lock, the barrel and the system or
breech housing are connected to each other by means of a threading.
Thus, the barrel and the breech mechanism are connected to each
other in the factory in a permanent manner.
It is desirable to employ guns of the above described type for
different purposes, especially where hunting guns are involved in
order to be able to use shells or cartridges of different caliber.
For this purpose it is necessary to exchange the barrel. However,
the factory completed threading connection between the barrel and
the breech mechanism does not permit such an exchange. Thus, it has
been suggested heretofore to exchange barrels of different caliber
by dividing the gun system into two sections and to mount the two
sections on a common base which in turn is rigidly secured to the
gun stock. One of these sections comprises the guide bushing for
the cylinder breech lock and the magazine. The other section
comprises the means for securing and locking the barrel.
Accordingly, each individual barrel is provided with such a
securing and locking section at its end adjacent to the cartridge
chamber, whereby the barrel may be secured together with the guide
bushing for the breech lock on the base in the stock of the
gun.
The just described conventional arrangement, however, requires a
point of fixation which should be spaced from the base as much as
possible in order to bring the barrel and the guide bushing for the
breech lock axially into alignment with each other. Such a point of
fixation of the gun barrel, however, prevents the latter from the
free movement which is desirable in order to achieve a constant
shooting precision.
OBJECTS OF THE INVENTION
In view of the foregoing, it is the aim of the invention to achieve
the following objects singly or in combination:
TO OVERCOME THE DRAWBACKS OF THE PRIOR ART, MORE SPECIFICALLY TO
SIMPLIFY THE EXCHANGE OF ONE BARREL AGAINST ANOTHER IN GUNS OF THE
ABOVE DESCRIBED TYPE;
TO PROVIDE MEANS FOR CONNECTING A BARREL TO THE BREECH MECHANISM IN
SUCH A MANNER THAT THE REQUIRED RIGIDITIES OF THE CONNECTION ARE
ASSURED, AND THAT ON THE OTHER HAND THE BARREL IS FREE TO MOVE OR
SWING AT ONE END THEREOF;
TO PROVIDE A COUPLING MEMBER BETWEEN THE BARREL AND THE BREECH
MECHANISM WHICH IS EASY TO MANUFACTURE AND SIMULTANEOUSLY
FACILITATES THE ASSEMBLY SO THAT THE BARREL EXCHANGE MAY EASILY AND
PRECISELY BE ACCOMPLISHED; AND
TO REDUCE THE NEED OF MANUFACTURING THE PARTS INVOLVED FROM HIGH
ALLOYED STEEL, SO THAT ONLY THE COUPLING MEMBER MUST BE
MANUFACTURED FROM SUCH HIGH ALLOYED STEEL.
SUMMARY OF THE INVENTION
According to the invention there is provided a repeater gun with
exchangeable barrels and comprising a coupling member which is
insertable into the breech mechanism housing from the front end
thereof, said coupling member having the shape of a hollow cylinder
which is provided at one end thereof with an inner threading for
connecting the respectively threaded barrel end to the coupling
member, the other end of which is provided with means such as a
suitable inner profile or shoulder for securing the coupling member
inside the breech mechanism housing, whereby such shoulder
cooperates with a respective shoulder of the bolt head in the
breech mechanism.
The above coupling member may be manufactured individually and
assures subsequent to each barrel exchange a precise and axially
aligned coupling between the barrel and the breech system without
diminishing the capability of the barrel to freely move or swing.
Another advantage is seen in that only the coupling member
according to the invention must be manufactured from high alloyed
steel since the coupling member alone takes up the forces occuring
when the gun is discharged. The remaining housing elements may thus
be manufactured from ordinary material which is accordingly easier
to process and to finish. Suitable materials in this respect would,
for example, be any materials which may be used for so called
precision casting.
BRIEF FIGURE DESCRIPTION:
In order that the invention may be clearly understood, it will now
be described, with reference to the accompanying DRAWING in which
the breech housing portion of a gun is shown partially in
section.
DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS:
The coupling member 1 is formed as a hollow cylinder which is shown
inserted into the breech housing 2 from the front end thereof, that
is, from the end facing the barrel 7. The housing 2 is provided
with a longitudinal slot 4 extending the length of the housing 2 so
that a stud 3 of the coupling member 1 may fit into the slot 4. At
the rear end of the housing, and adjacent to the slot 4, the
housing is provided with respective studs 18 provided with
threadings through which a chucking screw 5 extends.
The cooperation of the stud 3 and the slot 4 assures not only the
correct positioning of the coupling member 1 in the housing 2 it
also facilitates the securing of the coupling member relative to
the housing, for example, by means of a locking pin 17 inserted
into a respective hole in the stud 3, whereby the locking pin 17
may extend with each of its ends into locking contact with a
respective notch in the housing 2 adjacent to the slot 4.
The use of the locking pin 17 may be combined with the chucking
screw 5 or the latter may be used alone whereby the coupling member
1 will also be properly fixed within the housing 2 by tightening
the chucking screw 5. This arrangement has the advantage that the
barrel may be exchanged by means of a simple screwdriver, whereby
merely attention has to be paid that the coupling member 1 which is
exchanged along with the barrel, is properly inserted into the
housing 2. This proper insertion is automatically assured by the
guiding of the stud 3 in the slot 4. This arrangement has the
further advantage that it also permits an easy exchange of the bolt
head 12. Such exchange may be necessary, for example, where the
change to a larger caliber ammunition would call for a respectively
stronger bolt head 12. The exchange is easily accomplished by
merely sliding the housing 2 rearwardly after loosening the
chucking screw 5. Here again the bolt head 12 would be the only
element of the breech mechanism which requires manufacture from
high alloy material, whereas the remaining parts of the cylinder
breech lock mechanism may be manufactured from ordinary
materials.
After the exchange of the bolt head 12 with the new coupling member
surrounding the bolt head 12 the housing is placed back into the
ordinary position shown in the FIGURE and the chuckingscrew is
tightened, whereby all elements are clamped down into the proper
position.
The stud 3 of the coupling member 1 is provided with a means for
connecting the breech system to the stock of the gun, for example,
by means of a threading 6, into which a respective holding screw
(not shown) may be inserted.
The barrel facing end of the coupling member 1 is provided with an
inner threading 9 which cooperates with a respective threading on
the barrel 7 adjacent to its end comprising the cartridge chamber
8. When the barrel 7 is properly screwed into the inner threading 9
of the coupling member 1 a precise alignment of the bore 15 of the
barrel 7 with the longitudinal axis 16 of the gun is assured.
Further, the cooperating shoulders of the barrel end on the one
hand and the respective shoulders on the coupling member 1 and the
bolt head 12 on the other hand assure the correct locating of the
elements relative to each other. Thus, the coupling member 1 is
provided with an inner chamber 10 which receives the outer end of
the bolt head 12. Since the inner sections of the coupling member 1
have diminishing diameters, the insertion and guiding of the bolt
head 12 with its cylinder breech lock 11 is facilitated and the
bolt head 12 is securely locked inside the coupling member 1 by
means of the shoulder elements of the bolt head resting against
respective shoulder elements of the coupling member.
In view of the above, it will be appreciated that the barrel 7 and
the coupling member 1 and/or the bolt head 12 may easily be
assembled and disassembled and thus exchanged as desired.
Although the invention has been described with reference to a
specific example embodiment, it is to be understood that it is
intended to cover all modifications and equivalents within the
scope of the appended claims. Especially, the invention is not
limited to use in connection with a rifle, it may also be used in
connection with other small arms, for example, where the center
firing pin 14 is replaced by a rim firing member .
* * * * *