U.S. patent number 3,757,447 [Application Number 05/215,769] was granted by the patent office on 1973-09-11 for muzzle loading firearm.
Invention is credited to Robert W. Rowe.
United States Patent |
3,757,447 |
Rowe |
September 11, 1973 |
**Please see images for:
( Certificate of Correction ) ** |
MUZZLE LOADING FIREARM
Abstract
A muzzle loading firearm having a frame upon which is mounted a
centrally bored barrel with a centrally bored plug threadedly
fitted into and plugging the breech or rear end of the barrel, with
the plug having a rearwardly extending nipple portion over which a
cup-shaped percussion cap is placed. An axially movable spring
loaded bolt, aligned with the axes of the barrel and plug bores and
nipple, has an anvil end arranged to impact against the cap upon
actuation of a trigger mechanism, for firing the charge loaded
within the barrel through its muzzle. The bolt is locked against
axial movement by a safety mechanism, including a rotatable knob,
mounted upon the rear end of the bolt, with the knob having a
forwardly extending spacer pin arranged to selectively abut a
portion on the frame to prevent forward movement of the bolt or to
align with and fit into a frame recess of sufficient depth to
receive the pin when the bolt moves forwardly against the cap. An
openable flash shield normally covers the plug nipple and bolt
anvil portions.
Inventors: |
Rowe; Robert W. (Harbor
Heights, FL) |
Family
ID: |
22804307 |
Appl.
No.: |
05/215,769 |
Filed: |
January 6, 1972 |
Current U.S.
Class: |
42/51;
42/70.08 |
Current CPC
Class: |
F41C
9/08 (20130101); F41A 3/12 (20130101) |
Current International
Class: |
F41A
3/12 (20060101); F41C 9/08 (20060101); F41A
3/00 (20060101); F41C 9/00 (20060101); F41c
003/00 (); F41c 007/00 () |
Field of
Search: |
;42/51,1G,1Z,1L,1H,1J,1R,1M,1F,7F,69A,69R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Borchelt; Benjamin A.
Assistant Examiner: Jordan; C. T.
Claims
Having fully described an operative embodiment of this invention, I
now claim:
1. A muzzle firearm comprising a frame and a centrally bored
barrel, having a forward end and a rear breech end, removably
secured to the frame;
a centrally bored breech plug removably fastened within the rear
end of the barrel bore and having a narrowed nipple portion
extending axially rearwardly therefrom, whereby a cup-shaped
percussion cap may be positioned over the end of the nipple
portion;
an anvil means arranged for impacting against the cap positioned
upon the nipple portion, and a trigger means for actuating said
anvil means for firing the firearm;
said anvil means including a spring-loaded bolt axially slidably
mounted within the frame and axially aligned with the barrel and
plug bores and the bore nipple portion, and having a forward anvil
end for impacting, under spring force, against said cap position
over said nipple portion;
and said trigger means including means for holding the bolt axially
rearwardly against the spring force for releasing the bolt for
forward sliding movement for impacting against the cap upon manual
actuation of said trigger means;
said frame being open in the area of the plug nipple portion and
bolt anvil end for manual positioning of percussion caps upon the
nipple portion, and a cover secured to the frame and enclosing said
area with at least a portion of said cover being manually openable
and closeable for access to said area and for enclosing flashes
within said area.
2. A muzzle loading firearm comprising a frame and a centrally
bored barrel, having a forward end and a rear end, removably
secured to the frame;
a centrally bored breech plug removably fastened within and
plugging the rear end of the barrel bore;
said plug being formed in three integral portions, namely, an
externally threaded, forward body portion fitted within and
threadedly engaged with corresponding threads formed upon the wall
defining the barrel bore at the rear end of the barrel, and an
intermediate portion located outside of, but adjacent to the rear
end of the barrel, and formed with external wrench flats for
engagement with a separate wrench for disengaging the plug from the
barrel bore, and a rearwardly extending narrowed nipple portion
terminating in a free end of a size to receive a cup-shaped
percussion cap positioned over said free end;
and the central bore of said plug being axially aligned with the
barrel bore, and extending the full length of the plug, and being
of a diameter which is considerably smaller than the barrel bore
diameter, so that the plug normally closes off the rear end of the
barrel bore for retaining a charge of powder and ball within the
barrel bore, adjacent the plug, while permitting ignition of the
powder upon firing of the percussion cap, wherein the plug normally
forms a closed breech for the barrel, but may be removed for access
to and removal of undischarged charges remaining within the rear
breech end of the barrel;
an anvil means arranged for impacting against the cap positioned
upon the nipple portion, and a trigger means for actuating said
anvil means for firing the firearm.
Description
BACKGROUND OF INVENTION
Muzzle loaded pistols, rifles, and shotguns have become popular for
target and sport shooting. As in the case of the firearms of
antiquity, they are loaded by pouring a powder charge, wadding and
ball or pellets into the barrel through the nozzle. Suitable
precussion caps are used to ignite the powder charge upon trigger
actuation of the firearm.
Such type firearms have a tendency to misfire, meaning their charge
fails to ignite. In the case of such misfires, it is frequently
necessary to remove the unfired charge and reload the firearm. This
is a difficult, time consuming and relatively dangerous task. Thus,
the invention herein is primarily concerned with a construction
wherein an unfired charge may be easily, rapidly and safely removed
from the barrel of the firearm.
SUMMARY OF INVENTION
The invention herein contemplates a muzzle loading firearm barrel
with an easily removable breech plug having a rearward extension or
nipple upon which a cup-shaped percussion cap may be positioned for
ignition, upon impact, by an anvil forming end of a spring loaded
bolt, actuated by a suitable trigger mechanism. The bolt is
provided with a safety mechanism to prevent premature firing, which
mechanism includes a rotatable knob mounted on the end of the bolt
and serving both as a means for retracting the bolt for cocking the
firearm, as well as a selective safety means. A forwardly extending
pin formed on the knob is arranged to selectively abut the rear of
the adjacent firearm frame portion to prevent actuation of the
bolt, or alternatively, to align with a recess formed in the frame
whereupon the bolt may be slid forwardly, upon trigger actuation,
to impact against the percussion cap and fire the firearm.
Thus, the firearm herein is fired by means of a spring-loaded bolt
having a safety means to avoid premature firing, with the bolt
axially aligned with the breech plug, which removably closes the
breech end of the barrel and also carries the percussion cap.
Hence, in the case of a misfire, the barrel may be quickly and
easily dismounted from the supporting firearm frame, the breech
plug may be easily removed, and the charge then quickly and safely
removed from the barrel.
In addition, to protect the user of the firearm during firing, a
suitable flash shield or cover is arranged over the percussion cap
area of the firearm with the cover having an access door for
loading percussion caps and for preventing the escape of flash due
to firing of the cap.
These and other objects and advantages of this invention will
become apparent upon reading the following description, of which
the attached drawings form a part.
DESCRIPTION OF DRAWINGS of
FIG. 1 is an elevational view, partially in cross-section, of a
pistol embodying the invention herein.
FIG. 2 is a perspective view of the pistol, particularly showing
the rear end thereof and the flash cover access door opened.
FIG. 3 is an end view of the piston frame portion taken in the
direction of arrows 3--3 of FIG. 2.
FIG. 4 is an enlarged, cross-sectional view of the firing mechanism
of the firearm, with the firearm cocked and a percussion cap
mounted upon the breech plug nipple.
FIG. 5 is a view similar to FIG. 4, but showing the mechanism in
the fired position.
DETAILED DESCRIPTION
FIGS. 1 and 2 illustrate a muzzle loading firearm 10 in the form of
a pistol, which includes a frame 11 having a hand grip portion 12,
a trigger guard 13 and a forward extension portion 14. A centrally
bored barrel 15 is mounted upon the frame and secured thereto by
means of screws 16 extending through openings 17 in the forward
extension 14 of the frame (see FIG. 1).
The barrel bore 18 is provided with a threaded breech or rear end
19 which is removably closed by means of a breech plug 20. The plug
has a threaded portion 21 for engaging the threads of the barrel
breech and is provided with suitable wrench flats 22 for threaded
engagement and disengagement. The rear end of the plug is extended
to form a narrow nipple 23 and a bore 24 extends through the length
of the plug, including through the nipple. The nipple is shaped to
support a conventional cup-shaped percussion or firing cap 25 (see
FIGS. 4 and 5).
The percussion cap is ignited by the impact of the forward end of a
cup-shaped anvil 28, having an integral annular anvil flange 29 and
mounted upon the reduced end 30 of a slide bolt 31, by means of a
removable anvil pin 32 (see FIG. 4). The bolt 31 is journalled
through a sleeve 33 having a flange 34 formed on its rear end and
abutting against the adjacent frame portion. The sleeve acts as an
anvil stop. The bolt continues through an opening 35 formed in the
frame and extends out the rear end of the frame.
A coil spring 36, surrounding the sleeve and bolt, has its forward
end abutted against the anvil flange 29 and its rear end either
abutted against the sleeve flange 34 or against one or more spacer
washers 37 which are provided to adjust the tension of the coil
spring.
A safety mechanism is provided to prevent premature firing. This
mechanism comprises a knob 39 rotatably mounted upon the reduced
rear end 40 of the bolt 31 and frictionally held against the
shoulder, formed at the reduced bolt end 40 and the bolt body, by
means of a suitable leaf spring 41 and a cotter type pin 42
extending through the bolt end.
The knob is provided with a forwardly extending safety pin 43
which, for firing, is aligned, by rotating the knob, with a recess
or pocket 44 formed in the rear end of the frame 11. To prevent
firing, for safety purposes, the knob is rotated about 45.degree.
in either direction so that the pin 43 engages into one of a pair
of angularly arranged safety grooves 45 formed on the rear end of
the frame (see FIG. 3).
To assist the user in lining up the knob carried pin 43 with the
frame recess 44, line up grooves 46 and 47 are formed on the knob
and frame respectively.
A trigger operated mechanism is provided for firing the firearm.
This includes a sear lever 48 centrally pivoted upon a pivot pin 49
secured to the frame, and having a rear end forming a sear portion
50 which engages the anvil flange 29, as shown in FIG. 4. The
opposite end of the sear lever is provided with a small coil spring
51 which abuts the bottom surface of the barrel. Also, an
adjustable set screw 52 extends through the lever and is engaged by
a sear operating point 53 formed on a trigger 54 which is secured
by a pivot pin 55 to the frame. Adjusting the set screw up or down,
changes the amount of trigger pressure required.
To protect the user of the firearm against flash and debris from
the percussion cap, a U-shaped flash shield or cover 57 is arranged
to cover the firing mechanism and may be suitably fastened to the
frame, as by screws or the like (not shown). For access to the
nipple for replacing percussion caps, a flash cover door 58 is
secured to the cover by means of a pivot 59 (see FIG. 2), so that
the door 58 may be swung upwardly for access to the nipple and
downwardly to close off the firing mechanism area.
OPERATION
In operation, the firearm is loaded in the conventional manner,
through the muzzle, using a suitable ramrod for positioning the
powder, wadding and ball or pellets, in the case of a shotgun.
Thereafter, the access door 58 is opened, and the knob 39 is
grasped and the bolt is pulled backwardly, into cocked position, so
that the anvil 28 is spaced from the breech plug nipple 23. Then, a
percussion cap is placed upon the nipple. To prevent accidental
discharge while placing cap 25 on nipple 23, the knob 39 is rotated
either clockwise or counter-clockwise to turn the safety pin 43 out
of alignment with recess 44. Thus, if the bolt slides forwardly
accidentally, while loading, the safety pin will strike the frame
11 and prevent further forward movement of the bolt before the
anvil strikes the cap. After loading the flash shield door is
closed and the knob is rotated to realign the safety pin with the
recess so that the firearm is ready to be fired.
Alternatively, the safety mechanism may be applied, by rotating the
knob so that its safety pin 43 is aligned with one of the safety
grooves 45 at the rear end of the frame and the trigger may be
pulled while holding the knob, so that the sear is released from
the anvil flange 29 and the bolt may move forwardly, engaging the
safety pin 43 with one of the grooves 45. In this position, the
firearm cannot fire.
When it is desired to fire the firearm again, the knob is grasped,
the bolt pulled backwards again until the sear engages the anvil
flange, and the knob rotated, using the line up grooves on the knob
and frame as a guide, until the pin 43 is aligned with the recess
44 and the firearm is ready for firing.
In the case of a misfire, the user removes the barrel by removing
the barrel screws 16, and then the breech plug is removed from the
barrel, using a small wrench, and thereafter, the charge may be
easily taken out of the barrel.
As can be seen the above described mechanism may be embodied in a
pistol construction or in a rifle or musket or shotgun
construction, using appropriate barrels and stocks in place of the
pistol grip. Also, a suitable rifle stock may be fastened directly
to the pistol frame to thus convert the pistol to a rifle type
firearm.
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