U.S. patent number 3,866,516 [Application Number 05/383,592] was granted by the patent office on 1975-02-18 for semi-automatic piston employing a pivotally, slideable member.
Invention is credited to David M. Frisoli.
United States Patent |
3,866,516 |
Frisoli |
February 18, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Semi-automatic piston employing a pivotally, slideable member
Abstract
There is disclosed an automatic weapon which utilizes structure
providing an improved action. A slide member is coupled to a barrel
member. The barrel is rigidly secured to a frame and does not move
during firing. The slide is caused to move during recoil such that
it pivots and is urged to move a relatively large distance in a
short time thus providing an improved retardation action and
further compensating for barrel rise during recoil.
Inventors: |
Frisoli; David M. (Edison,
NJ) |
Family
ID: |
23513831 |
Appl.
No.: |
05/383,592 |
Filed: |
July 30, 1973 |
Current U.S.
Class: |
89/190;
89/198 |
Current CPC
Class: |
F41A
3/32 (20130101); F41A 3/06 (20130101) |
Current International
Class: |
F41A
3/06 (20060101); F41A 3/32 (20060101); F41A
3/00 (20060101); F41d 003/06 (); F41d 011/12 () |
Field of
Search: |
;89/180,184,190,196 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
George M. Chinn, The Machine Gun, 1951, pp. 160-169..
|
Primary Examiner: Bentley; Stephen C.
Attorney, Agent or Firm: Plevy; Arthur L.
Claims
1. A firearm for firing projectiles, comprising a slide member
moveable from a first position to a second position, a barrel
assembly integrally formed with a frame assembly, means coupling
said barrel to said slide to cause said slide to first pivot upward
away from said barrel during recoil when moving from said first to
said second position and while said projectile is still in the
barrel and furthest away from the muzzle end of
2. A firearm, for firing a projectile, comprising,
a. a frame assembly,
b. a barrel assembly rigidly coupled to said frame assembly,
c. a slide assembly adapted to be positioned over said barrel
assembly and moveable from a first to a second position, and
d. means coupling said barrel assembly to said slide assembly to
cause said slide to pivot upward at a muzzle end of said barrel as
said slide is moved from said first to said second position and
thence move relatively parallel to said barrel, said slide pivoting
upward before said projectile leaves said barrel and beginning when
said projectile is furthest away
3. A firearm for firing projectiles comprising a slide member
moveable from a first position to a second position, a barrel
assembly rigidly secured to a firearm frame assembly, means
coupling said barrel to said slide to cause said slide to pivot at
a breech end of said barrel when moving from said first to said
second position during a recoil of said gun due to the firing of a
projectile, said barrel having located on a surface thereof near
said muzzle end at least one projection having an inclined surface,
which projection is accommodated within an aperture on a surface of
said slide, said aperture substaintially congruent with said
projection whereby when said slide member begins to move from said
first to said second position, said slide is forced to pivot upward
and away from said barrel as it moves over said inclined surface to
exert a downward force on said barrel before a projectile is
discharged from said muzzle but while it is traveling within said
barrel and commencing when said projectile is still
4. The firearm according to claim 3 wherein said inclined surface
of said projection is at an acute angle with respect to the center
line of said
5. The firearm according to claim 3 wherein said means coupling
said barrel to said slide further include a breech block coupled to
said slide and moveable with respect to said housing in a direction
relatively parallel to said barrel, said breech block adapted to
pull said slide over said
6. A projectile firing gun including a frame assembly having a
barrel rigidly secured to said frame and a slide covering a portion
of said barrel and mounted for movement between a first and a
second position, said barrel having at least one lug assembly
located near a muzzle end of said barrel and positioned within a
lug accommodating aperture located on a cooperating surface of said
slide, and means located at the breech end of said barrel and
coupling said slide to said barrel to cause said slide to pivot
with respect to said barrel when said slide moves from said first
to said second position, the upward movement of said slide due to
said pivoting motion being determined by a surface contour of said
lug whereby said upward movement causes a force to be exerted on
said barrel to compensate for an undesireable barrel movement due
to a movement of said frame when a projectile is fired and before
said projectile leaves said
7. A firearm assembly for firing projectiles comprising a U-shaped
slide member adapted to be positioned over a barrel assembly, said
barrel assembly being rigidly secured to a firearm frame assembly,
said slide member being moveable from a first position to a second
position, means coupling said slide member to said barrel assembly
to cause said slide member to pivot upwardly initially during said
movement from said first to said second position and to then move
relatively parallel to said barrel member, said barrel member
having located thereon near a muzzle end a lug having a front
surface which is inclined with respect to a barrel center line and
directed towards a breech end of said barrel, said slide having a
corresponding aperture which is positioned over said lug in said
first position and is removed from said lug during said second
position so that said lug is not in contact with any part of said
slide during said second position, said inclined surface of said
lug causing said slide to pivot upwards and away from said barrel
while moving to said second position, and while said projectile is
still traveling in said barrel and furthest
8. A firearm for firing projectiles including a frame assembly
having a handle portion with a barrel portion rigidly secured to
said frame assembly and a slide assembly covering said barrel
portion and mounted for movement with respect to said barrel from a
first to a second position, said barrel having at least one
projection located nearer a muzzle end of said barrel as compared
to a breech end of said barrel, said projection having a given
surface contour and of a given slope with respect to the barrel
center line, said projection being accommodated within a projection
indentation located on the corresponding surface of said slide so
that said projection is within said indentation when said slide is
in said first position, and means coupling said slide to said frame
assembly to move said slide from said first to said second position
to cause said slide to move over said sloped surface contour of
said projection as pivoting upwards from said barrel center line,
and thence to said second position defined by the complete exposure
of said projection due to the movement of said slide, whereby a
portion of said barrel including said projection is uncovered when
said slide is in said second position, said motion of said slide
over said projection causing a downward force on said barrel during
recoil occuring while said projectile is still traveling in
9. The firearm according to claim 8 wherein said means coupling
said slide to said frame includes a breech block slideably mounted
on said frame for relatively parallel movement with respect to said
barrel, said breech block including means coupling the same to said
slide to therefore move
10. A firearm, comprising,
a. a frame assembly including a handle portion and a barrel portion
rigidly secured to said handle portion,
b. a slide member adapted to cover said barrel portion of said
frame assembly and capable of moving from a first rest position
where said slide is substantially covering said barrel to a second
recoil position where a portion of said barrel is exposed and not
covered by said slide,
c. a breech block slideably mounted on said barrel portion of said
frame assembly and coupling said frame to said slide, said breech
block positioned above said handle of said frame and adapted to
move relatively parallel to the center line of said barrel portion
during recoil, and
d. means forming a projection located on said barrel portion at
said muzzle end, said projection having an inclined surface and
accommodated within a recess located on corresponding surface of
said slide member when said slide is covering said barrel portion
in said first position, said slide as moved by said breech block
being forced over said surface of said projection to pivot rapidly
upward with respect to said frame and barrel during recoil, said
slide, when in said second position, having no surface in contact
with said projection; said pivoting motion occuring while a
projectile is still traveling in the barrel and furthest away from
the muzzle end of said barrel, said motion exerting a downward
force on said barrel to tend to hold the firearm in an aimed
position.
Description
BACKGROUND OF INVENTION
This invention relates to automatic weapons and more particularly
to an improved operating action utilized in such a weapon.
Basically, there exists a wide variety of guns or automatic
weapons. In its wider sense, the term "gun" can include any kind of
firearm from a pocket pistol to a heavy cannon. Although guns can
be placed in many categories, a convenient way of describing them
would be those having large bore barrels and those having small
bore barrels. The function of a gun barrel is to enable the
projectile or bullet to reach a suitably high initial velocity in a
very shor time. In an automatic weapon, all the functions of firing
and reloading are performed by the gun or weapon itself. Basically,
these functions can be described as firing the cartridge,
withdrawing the bullet, ejecting the spent cartridge case, cocking
the hammer, forcing the bullet forward and inserting a fresh
cartridge into the chamber so that the next show can be fired. The
energy for performing these functions is either provided by the
pressure of the gas produced by the firing of the cartridge or by
the recoil of the weapon.
Coupled with the desire to automate the weapon for rapid firing,
there is a further desire to maintain or provide an accurate
weapon. Accuracy is difficult as the caliber of the bullet or
projectile increases because of the recoil of the weapon and the
difficulty in maintaining the weapon steadily. This is especially
true in pistols or hand-held guns. It is well known that the gas
pressure develops when the gun is fired thus producing high
stresses in the interior of the barrel. For this reason, monobolc
(one piece) barrels are used only for guns of very small
caliber.
In most large caliber guns, the barrel moves or recoils to absorb
the energy produced when the bullet is ignited. Besides barrel
movement in the horizontal plane, there is also vertical movement
which causes the barrel to rise during the firing.
These factors, as well as others, serve to adversely affect the
accuracy of the weapon.
The following discussion will concentrate on a large bore pistol
such as a 0.45 caliber pistol as compared to a 0.22 caliber or a
conventional monobolc pistol. This type of firearm has been in use
for many years employing automatic action. Perhaps the earliest
example of such a pistol is evidenced by U.S. Pat. No. 580,924
entitled FIREARM by J. M. Browning, patented Apr. 29, 1897. This
patent shows a gun with a completely automatic action including a
moveable barrel and slide. As indicated, accuracy has always been a
concern and there exists many improvement patents whereby they have
included mechanisms to compensate for the movement of the barrel
during firing. Therefore, the prior art shows a number of patents
whereby the barrel is mounted so that its breech end swings
slightly downwardly upon recoil and so on. These patents include
compensating bushings and other devices to maintain accuracy.
Examples of such typical patents showing certain prior art gun
configurations are evidenced by U.S. Pat. No. 3,158,064 entitled
FIREARM WITH A PIVOTABLE BARREL HAVING A SPHERICAL HUMP ENGAGING A
SLIDE MEMBER by D. W. Charron, patented on Nov. 24, 1964 and U.S.
Pat. No. 3,411,408 entitled MOUNTING STRUCTURE FOR PISTON BARRELS
by F.A. Pachmayr, et al., patented on Nov. 19, 1968.
It would be accurate to say that in most of the prior art guns, the
barrel moves and is not fixed with respect to the receiving part of
the pistol which commonly includes the handle and the trigger
mechanism. When it is stated that the barrel moves, it is meant
that it moves intentionally due to the nature of the gun design.
Accordingly, in such pistols, the barrel is slidably mounted on the
receiving portion of the gun. The inherent movement of the barrel,
as indicated above, affects accuracy of the gun in that in order to
assure true aim in an automatic weapon, the movement of the barrel
has to be the same for each shot and so on.
It is an object of the present invention to provide an automatic
large bore piston employing a stationary barrel or a barrel which
can be integrally formed as a part of the receiving portion of a
gun. In such a gun, a slide mechanism operates during recoil to
perform, by its movement, the steps indicated above as normally
associated with an automatic weapon.
It is a further object of the present invention to provide a
moveable slide arrangement whereby the slide is constrained to move
in an opposite direction from the direction of the projectile
released by the gun while simultaneously moving upward. This
composite motion exerts a force on the stationary barrel which
tends to push the same downwardy or in a direction to compensate
for the undesired barrel rise.
These and other objects are provided in a new gun mechanism capable
of automatically firing a successive number of large caliber
bullets while maintaining relatively identical accuracy and
velocity for each shot.
BRIEF DESCRIPTION OF PREFERRED EMBODIMENT
A projectile firing gun includes a frame assembly for a barrel
rigidly secured to the frame and a slide covering a portion of said
barrel and mounted for movement between a first and a second
position. The barrel has at least one lug assembly located near the
muzzle end and positioned within a lug accommodating aperture
located on a cooperating surface of said slide. Means are located
on the breech end of the barrel which couple the slide to the
barrel and permits the slide to pivot with respect to the barrel
when the slide moves from said first to said second position. The
upward movement of said slide being due to said pivoting motion as
determined by a surface contour of said lug.
BRIEF DESCRIPTION OF FIGURES
FIG. 1 is a cross sectional view showing an automatic weapon
according to this invention.
FIG. 2 is a side elevational view of the gun of FIG. 1 showing the
slide mechanism in a maximum recoil position.
FIGS. 3 through 6 are a series of drawings showing the sequence of
operation and motion of the various parts of a weapon according to
this invention.
DETAILED DESCRIPTION OF DRAWINGS
Referring now to the figures, it is to be understood that the
invention is adapted to be used with a hand-held automatic firearm
capable of firing a large caliber bullet.
FIG. 1 shows a side cross sectional view of the firearm 10 which
includes a frame 1, trigger 9, trigger guard 11 and a hammer 7. The
frame 1 is integral with the barrel portion 14 of the gun.
Conventionally, the frame 1 includes a handle 12 as shown as a grip
which includes the trigger guard 11. The handle is hollow and
accommodates a cartridge or magazine with a spring for feeding the
bullets into the chamber during operation of the weapon. In this
gun, the barrel portion 14 does not and cannot move with respect to
the frame 1 or handle 12. These components can be integrally formed
by means of a single casting or formed separately and later welded
or secured together. The important initial aspect being that the
barrel portion 14 of the gun is stationary with respect to the
frame 1.
Slideably mounted on the barrel portion 14 of the frame 1 is a
slide member 4. The slide, as will be seen, cooperates with a
breech block or bolt assembly.
The slide assembly 4 is slideably mounted for rearward or recoil
movement with respect to the barrel portion 14, and at the same
time can pivot about a stabilizer skid point located at the rear
end of the frame 1 near the handle or breech portion of the gun.
The skid stabilizer, as will be explained, forms a pivot point
which permits the slide to move upward while moving away from the
firing direction of the projectile or bullet 20. The bullet 20,
which may be a 0.45 caliber, is shown seated in the front portion
or firing chamber of the central bore 15 of the barrel portion
14.
As can be seen from FIG. 1, the hammer 7 is cocked and can be
released by activation of the trigger 9. As the trigger 9 is
squeezed, the bar 21 is moved backward. A projection on the arm
releases a hammer trip member 22. The hammer is forced toward the
firing pin 24 by means of the energy stored in the hammer spring
23. The hammer conventionally strikes the firing pin 24 which is
mounted coaxially with the breech block 25. The firing pin is
forced towards the bullet by the hammer and strikes the bullet
causing ignition as it is conventionally known.
The above described mechanism for operating a hammer and firing pin
arrangement is known and can be implemented in a variety of
different ways.
The main concern of this application, as has been indicated above,
is to describe the unique action as to the movement of the slide
member 4 with respect to the barrel portion 14.
Due to this unique movement and due to the fact that the barrel is
entirely stationary with respect to the frame, the accuracy of a
large bore pistol has been increased. This further effect is
provided together with extreme reliability as compared to the prior
art units.
If reference is made to FIG. 2, there is shown the slide portion 4
retracted rearwardly from the barrel portion 14. The distance
designated as D shows the amount of backward movement during the
recoil action by the slide member with respect to the barrel
portion 14.
Before further describing the basic components of the gun, a
description of the unique action will be had by referring to FIGS.
3 through 6 which in essence are simplified diagrams showing the
sequence of events as they occur during firing.
DESCRIPTION OF FIG. 3 GUN IS IN CLOSED POSITION AND READY TO BE
FIRED
There is shown the bullet 20 in the firing chamber portion of the
central barrel bore 15. The slide 4 is maintained about the barrel
portion 14 and the extreme front edge 30 of the slide 4 is closest
to the gun sight 31 which is rigidly affixed to the barrel portion
14 of the gun near the muzzle. Also shown on the barrel portion are
a first and second lugs respectively designated as 32 and 33. These
lugs have angled front surfaces and cooperate with similar
indentations formed in the slide portion of the gun. Thus, as can
be seen, the lugs 32 and 33 are seated within the lug-accommodating
apertures associated with the slide portion of the gun and this is
in the closed position. The surfaces of the lugs are inclined at an
acute angle with respect to the barrel aperture. The angle used is
about 65.degree. but other angles can be used as well, the
important factor being that the angle is such to prevent locking
the slide to the barrel.
Also shown is a bolt assembly or breech block 24. The bolt 25 has a
central aperture, as indicated, which accommodates the firing pin
mechanism 24. The bolt as positioned is moveable with respect to
the fixed barrel 14 and is coupled to the slide portion by means of
lugs 35 and 36 located on the top surface of the bolt or breech
block 25. The lugs are shown as generally rectangular in shape as
compared to the inclined surface of lugs 32 and 33 previously
mentioned.
FIG. 3 shows the hammer 7 is in direct contact with the firing pin.
The following action occurs immediately when the firing pin 24 is
pushed forward by the hammer. The spring 35 associated with the
firing pin is compressed. The end of the firing pin strikes the
back surface of the bullet 20. As is known, the powder is ignited
and the projectile is released from the shell or case of the
bullet. At the moment of ignition, tremendous gas pressure develops
causing the release of large amounts of energy. Essentially, one is
talking about the conversation of momentum in that the bullet which
was stationary is, due to the explosion, propelled with a large
velocity. This velocity together with the bullet's mass imposes a
large force in the opposite direction upon the gun thus causing
recoil. The gun is forced back and because the grip is below the
barrel, the user's hand is rotated upwardly.
DESCRIPTION OF FIG. 4 THE BULLET IS PROPAGATING DOWN THE BARREL OF
THE GUN
As shown in FIG. 4, the projectile portion of the bullet 20A is
separated from the shell 20B and is being propelled at great
velocity through the barrel. A force is exerted upon the breech
block 25 which moves rearwardly due to this force imposed by the
moving projectile. The movement of the breech block or bolt 25 is
at a 3 degree angle with respect to the center line 40 of the
barrel. As the breech block is forced back, it pulls the slide 4
with it due to the action of the lugs 35 and 36. The slide is
permitted to move due to the location of a stabilizer skid 41 which
couples the slide to the barrel and rides in a channel 42 located
in the inside side wall of the slide 4. The channel is shown in a
solid line for the sake of simplicity. The term "stabilizer skid"
is used to indicate action. Basically, all one needs to provide is
a projection on the frame, which projection rides in a channel
located on the inside surface of the slide member. In this way, the
backward motion of the slide member is constrained by the
dimensions of the channel as is the pivoting of the firing arm.
While a particular mechanism is shown, it is realized that many
mechanisms can be employed to permit the slide to move as described
with respect to the barrel.
The movement of the slide 4 can be seen from a comparison of FIGS.
3 and 4 and by noting the position of the skid 41 within the
channel 42. It is also seen that the slide is moving back and at
the same time is pivoting about the skid location 41. This pivoting
is in an upward direction and occurs when the gun is firing and the
bullet is traveling down the barrel bore. The slide as it is
pivoting is also moving back across the lugs 32 and 33. This motion
causes a downward force to be applied to the fixed barrel portion
14 of the gun. The downward force compensates for the barrel rise
which is inherent due to the force developed during the firing of
the gun. The motion of the slide with respect to the barrel causes
a compensating force to be directed on the barrel, the force tends
to maintain the barrel rise stationary during firing.
DESCRIPTION OF FIG. 5 THE PROJECTILE HAS LEFT THE MUZZLE
FIG. 5 shows the position of the slide 4 as the bullet is leaving
the muzzle of the gun. In FIG. 5 the projectile is shown leaving
the muzzle end of the barrel portion 14. The slide is shown in its
maximum upward position with respect to the barrel portion 14.
Accordingly, the lug accommodating apertures associated with lugs
32 and 33 are above the respective lugs. It is noted that the
rearward movement of the slide with respect to the muzzle end of
the gun is relatively slight but the projectile is discharged from
the gun. Essentially, the slide is forced to move a relatively
large amount upward for a very small backward motion. This is
accomplished by forcing the slide to move over the angled surfaces
of the lugs. In fact, approximately speaking, the slide moves to
the position shown in FIG. 5 during the first 0.125 inches of
backward travel of the bolt 25. As can be seen from FIG. 5, this
distance is relatively small. The action of the slide is mainly a
pivoting action during this small initial travel. It is further
seen that as the bullet or projectile is propagating down the
barrel to be released at the muzzle end, the slide is exerting a
downward force on the barrel as it is traveling over the lugs 32
and 33. This downward force tends to compensate for the rise of the
barrel which occurs as the bullet is ignited and released. Thus,
the compensating force on the barrel by slide 4 improves the
accuracy of the gun. As shown in FIG. 5, as the bullet is leaving
the muzzle, the slide has moved over the lugs 32 and 33 and will
continue its backward motion.
DESCRIPTION OF FIG. 6 BACKWARD MOTION OF SLIDE AND AUTOMATIC ACTION
OF THE GUN
In FIG. 6 the slide 4 has moved into its extreme back position
which is further evidenced by the complete exposure of lug 32. It
is, of course, noted in FIGS. 3 through 6 that the backward motion
of the slide operates against the tension of a spring 50, which
spring exerts force between the frame assembly or barrel portion
and the slide member 4. The spring 50 is substantially compressed
in FIG. 6. In the meantime, the bolt 25 has moved to its extreme
back position whereby the hammer 7 has been reset or cocked by the
camming surface of the breech block 25. As can be seen from the
figure, once the hammer 7 is pushed back to the position shown in
FIG. 1, it is automatically held in place by member 22. The action
of the slide in forcing the hammer downward again also compresses
the hammer spring 23 thus a first step for automatic firing is
accomplished by this movement.
As is clearly shown in FIGS. 4 and 5 for example, the shell of the
bullet 20B is still within the firing chamber 51 of the barrel 15.
This shell must be ejected to accommodate an automatic firing
process.
Referring to FIG. 2 there is shown a shell ejection port or
aperture 53 located on the top surface of the slide 4. It is noted
that in FIG. 2 the slide member is in its extreme back position
with respect to the muzzle end of the gun.
Now referring to FIG. 6, the hammer 7 is shown ready in position.
When a bullet as 20 is in the firing chamber, an extractor pin (not
shown) is inserted into the ridge of the bullet formed by the back
surface of the bullet and the cartridge wall. The ridge is shown in
FIG. 3 as 70.
The extractor pin is secured to the breech block 25 and as the
breech block moves back due to recoil, the casing 20B is pulled
along. An ejector pin is situated on the frame assembly 14 and is
in the path of the shell as it is drawn back. As indicated, the
ejector port 53 moves back with the breech block because of the
motion of the slide 4. The ejector pin contacts the shell when the
port 53 is aligned with the shell but before the breech block is
clear of the cartridge case. The ejector stop causes the bullet to
spin and be urged upward and through the ejector port 53 as shown
in FIG. 6. The shell 20B is thus ejected. The breech block
continues to move back and clears the cartridge case to allow the
next bullet 60 to be inserted into position with the bore of the
barrel. During return of the breech block, the bullet is pushed
into the firing chamber 51 and a new sequence is ready. Thus, two
additional steps for automatic firing have been achieved, namely,
the shell is ejected and a new bullet or a fresh bullet is moved
upward into the barrel area of the gun. The slide must now be
returned to the position shown in FIG. 1. This is accomplished by
means of the spring 50 of FIG. 1 which operates as the return
spring. The return spring 50 is conventional in most automatic guns
which incorporate a moveable slide. In any event, the spring being
compressed during recoil now returns the slide to its initial
position. To further assure that the slide is properly returned,
there is shown an actuator arm 71 with a spring 70. The name
actuator is used to indicate that if this is not properly returned,
the gun cannot be fired. The operation of the arm 71 and the spring
70 is clearly shown in FIGS. 3 through 6 and essentially operates
as follows:
As the slide is moved backward, the actuator arm is tilted or
raised from the position shown in FIG. 3 to the position shown in
FIG. 6 by means of a spring. The entire slide after firing is
pushed back towards its initial position by means of spring 50
which is the return spring. As the slide is pushed back towards the
muzzle end of the gun by the spring 50, a notch 73 in the slide
contacts the projection 74 on the actuator arm 71. This then pushes
the actuator arm back into position and assures that the slide is
closed in its proper position. The actuator arm together with its
spring also serves to dampen the slamming action of the slide when
it is being returned to its quiescent condition. Thus, at the end
of the sequence, the weapon is as shown in FIG. 1 and is ready to
be fired again and again, completely automatic as described, and
until the last bullet is expended.
The above mentioned action was utilized in a pistol as shown. The
pistol built was approximately 8 inches long. The slide and the
breech block 25 weighed about 14 ounces. The reason for this
tremendous reduction in weight without a locking system of the
prior art is afforded by the increased retardation available in
this firearm. Thus, when the pressure is greatest during recoil
(i.e. the bullet is in the barrel but has been fired), the slide 4
moves a larger distance in a short time as compared to the distance
moved by the bolt (0.125 inches as indicated above). This is due to
the fact that the slide was caused to move over the inclined
surface of the lug. The retardation is also increased by the fact
that the bolt is moving relatively horizonally and this movement
has to be translated to cause the slide to move upward.
Since the pivoting occurs at the breech end of the gun, then this
increased motion occurs at the front; therefore, if more weight
were added to the front, the retardation would even be greater.
It is understood that this invention in regard to the above noted
action takes advantage of the laws of momentum and conservation of
energy. The idea of this invention is to permit the slide to move a
relatively large distance upward and back very quickly and during
that time when the greatest pressure or force is exerted on the
breech block. In this manner, retardation can be obtained quickly
and barrel rise is compensated for due to the pressure exerted by
the slide on the barrel assembly. It is also important to note that
the barrel assembly is rigidly secured to the frame and the gun
sights can now be secured to the barrel assembly so that extreme
accuracy can be maintained.
While a particular configuration has been shown for the gun, it is
also realized that the principal can be used in any type of firearm
and is not necessarily confined to a 0.45 caliber projectile. It is
the main purpose of this application to describe the new and
improved action and it is realized that the same advantages and
benefits and other variations may be made in this invention without
departing from the scope thereof. This can be done especially in
different types of firearms and the invention should be limited in
scope only as determined by the following claims.
* * * * *