Technical Field
[0001] The present invention relates to a manual portable fire arm and is intended for use
by civil persons for self-defense by shooting with traumatizing elements or by audio
and light signals (shot flash).
Backoround Art
[0002] Creation of civil arm for self defense requires to satisfy some requirements. First
of all, a limitation for specific energy (relationship between energy and area of
a cross-section of a bullet) must be maintained. This magnitude must be less or equal
to 0.5 J/mm, since when its magnitude is greater infliction of heavy body injuries
is possible. At the same time, the general level of energy must be sufficiently high
(∼100J), otherwise effects of an arm with a stopping action will not be achieved.
The stopping action is characterized by an ability to transfer a certain quantity
of kinetic energy to an obstacle with a minimal depth of penetration. Action of a
self-defense arm must not lead to heavy body injuries, maiming, and the arm itself
must prevent a possibility of its criminal use for a direct application.
[0003] A civil self-defense arm is known, which is a so-called «gas» arm: gas guns and revolvers
and cartridges for them.
[0004] Appearance, sizes, designs of main mechanisms and a caliber of the used cartridges
of this arm usually corresponds to military arm, or in other words they are copies
of the military arm as to its structural design. Cartridges for such arm do not contain
bullets, and equipment of cases is composed of a mixture of smoke powder and any active
substance. Cases of cartridges are provided with electric spark igniter of striking
action. For the purpose of preventing use of in such an arm of military cartridges,
various structural concepts are utilized. For example these problems are solved by
making a guntube and other parts of a material which has intentionally lower strengths,
which can lead to a crack of the guntube from pressure of powder gasses during shooting
with a military cartridge. For providing a possibility of criminal application, the
axis of the cartridge holder and a channel of the gun tube is offset, or a strong
partition is installed in the channel of the guntube (without a complete blocking
of the cross-section) which is composed of a hard alloy or a metal-ceramic. Nevertheless,
the possibility of criminal use of this arm with the application of military cartridges
is not excluded. Cases are widely known when such an arm is redesigned since it is
available.
[0005] Also, arms are known in which cartridges are activated by electric current. Mainly
such structural solutions are used in a high caliber arm which is installed mainly
on flying apparatuses and ships. For example, aviation cassettes for signal cartridges
and cartridges of various interferences.
[0006] In a portable shooting arm, electrical methods of triggering of cartridges did not
find their application.
[0007] A solution for use of electrical method of shooting in a shooting arm is known (see
U.S. patent no. 3,854,231 F 41 C 19/12 December 17, 1974). In this patent an arm is
considered, in which cartridges composed of a great number of successively shooting
charges are used.
[0008] In this case the electrical method is used for the purpose of providing a successive
shooting of charges, which would be very difficult to realize with the use of electric
spark ignitors.
[0009] As a prototype, a device is selected(see patent of RF no. 2079087 C1, F 41 C 300,
May 10, 1997) which discloses a self-defense arm including a gun tube and tubes formed
as cases of cartridges.
[0010] This device has a substantial disadvantage-the presence of cumbersome-striking-activating
mechanism. Big sizes and mass of striking-activating mechanism are substantially determined
by the necessity to perform additional functions, such as distribution of strikes
of a striker (main) against peripheral strikers, which in turn requires introduction
into the striking-activating mechanism of additional kinematically connected massive
parts.
Disclosure of Invention
[0011] The objective of the present invention is to create an efficient and reliable self-defense
arm, which excludes the possibility of its direct criminal application with the use
of military cartridges, even also after an available conversion in household conditions.
[0012] This objective is achieved in that in a self-defense arm, containing a holder of
cartridges, gun barrels formed as cartridges with an electrical spark igniter, and
in which an activating mechanism of triggering includes a pulse magneto-electricor
pulse electro-chemical current source, electrically connected with a distributing
device which contains a contact block.
[0013] A comparative analysis of the proposed solution with the prototype and other technical
solutions in this technical area shows that the claimed solution is characterized
by a gun tube formed as a cartridge case with an electric spark ignitor and an activating
mechanism. This allowed to completely exclude a possibility of direct criminal application
of this self-defense device. At the same time, a general level of energy is provided
for achieving a stopping action, but a limitation of specific energy is maintained.
A total speed of a bullet can not be increased over 150 m/s (speed of bullet for inflicting
heavy body injuries must be 180-200 m/s). Moreover, electric spark ignitors are not
in a free commerce and during its manufacture a very strict account is carried out.
[0014] In the claimed self-defense arm, the design of the activating mechanism with the
source of electrical current allows to exclude a possibility of its criminal use,
since all military cartridges of a shooting arm are provided with capsules-spark igniters
of a striking action.
[0015] For providing a shooting with special cartridges, the arm is equipped with a distributing
device (a switching mechanism, which provides a predetermined sequence of shooting
and indexing of gun tube which has been activated.
Brief Description of the Drawings
[0016]
Figure 1 shows a general view of a self-defense arm.
Figure 2 shows a front view.
Figure 3 shows a variant of use of the arm with a cartridge case.
Variant of Carrying Out the Invention
[0017] The arm is composed of four cartridge cases (1) with an electric spark igniter (2)
installed in a casing (3). A source of electric current (5) and a distributing device
(switching mechanism) (6) are arranged in a handle (4). As a source of electric current,
a mechanical magneto-electric pulse generator is used. It is possible to use other
sources of current, for example an electrochemical source (battery). Cartridge cases
are retained in nests of the casing and pressed to contacts (7) by springy elements.
A block of contacts is formed as a separate assembly which is immovably fixed in the
handle. The mechanism of switching is controlled a by starting key through a rod,
simultaneously the starting controls a button of a car generator.
[0018] The arm operates in the following manner. One or several cartridges composed of a
case with an electric spark igniter, a throwing charge and a body to be thrown (signal
pirotechnical element, rubber bullet, light-sound element) are introduced into the
casing of the arm, and the starting key is pressed.
[0019] During pressing, a displacement of a pusher of the distributing device is performed
(in other words a switching (of channels) of contacts in the contact block is carried
out), and also a displacement of the button of the current generator which is triggered
during a further movement of the key. Current pulse passes through the switch to a
corresponding contact and electric spark igniter. The cartridge is triggered. During
subsequent pressing, a successive triggering of the remaining cartridges is performed.
[0020] The operation of the self-defense arm when the cassette is formed with one nest is
performed analogously.
Industrial Application
[0021] The design of the gun tube as a cartridge with an electric spark igniter and the
use of a source of electric current for activation allowed to create an efficient
self-defense arm, excluding the possibility of its criminal use for direct application
(possibility of increasing a striking factor).