Barrel of a gun

Abstract

A gun barrel that consists of a frame tube that encloses a barrel tube that is used to induce rotation to a projectile. The gun barrel as a whole constitutes an electric motor. The barrel tube is a permanent magnet and acts as the rotor of the motor. The stator coils of the motor are located outside the barrel tube and are used to induce rotation to the rotor, i.e., the barrel tube.

Claims

1. A gun barrel comprising a frame tube that encloses a barrel tube that is used to induce rotation to a projectile, wherein, the gun barrel as a whole constitutes an electric motor such that: the barrel tube is a permanent magnet and acts as the rotor of said electric motor, and the gun barrel further comprises stator coils surrounding the barrel tube, said stator coils being configured to induce rotation to the rotor.

2. The gun barrel according to claim 1, wherein, a frame tube that acts as a frame for the stator coils is located outside the stator coils.

3. The gun barrel according to claim 1, wherein, a chamber of the gun barrel is a part of the rotating barrel tube.

4. The gun barrel according to claim 1, wherein, the barrel tube is supported from the front and from the behind with ball bearings.

5. The gun barrel according to claim 1, wherein, an air gap is located between the stator coils and the barrel tube acting as the rotor of the electric motor.

6. The gun barrel according to claim 1, wherein, the barrel tube acting as a rotor is equipped with a titanium jacket.

7. A gun barrel comprising: a frame tube, a barrel tube enclosed within the frame tube, and stator coils affixed to the frame tube such that the stator coils surround the barrel tube, wherein the barrel tube is a permanent magnet such that the barrel tube acts as a rotor in an electric motor comprised of the barrel tube and stator coils.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is described below by means of an example and referring to the attached drawing, where:

(2) FIG. 1 depicts the cross-section of the gun barrel and

(3) FIG. 2 depicts the longitudinal section of the gun barrel.

DETAILED DESCRIPTION

(4) The gun barrel consists of a frame tube 1 that encloses the smoothbore steel tube 2 that is used to induce rotation to the projectile. The gun barrel as a whole constitutes an electric motor such that the barrel tube 2 is a permanent magnet and acts as the rotor of the electric motor; and that the stator coils 3 of said motor are located outside the barrel tube 2 and are used to induce rotation to the barrel tube 2. The frame tube 1 that is located outside the stator 3 acts as the frame of the stator. The chamber 4 of the gun barrel is a part of the rotating barrel tube. The cartridge, after being placed inside the chamber, reaches the desired angular velocity prior to the release.

(5) The barrel tube is supported from the front and from behind with ball bearings. The barrel tube has to be supported from the middle, too, with one or several ball bearings. (not presented in figure)

(6) There is an air gap 7 between the stator 3 and the rotor 2. The rotor 2 is 15 equipped with a titanium jacket 8 that supports and protects it from mechanical stress.

(7) The gun barrel is attached to the bolt mechanism of the gun, e.g., by using external screw threads. A gun barrel without said external screw threads can be attached to the gun, e.g., by using a press connection mechanism in the bolt mechanism. The material of the frame tube can be some suitable steel or aluminum alloy or, e.g., glass or carbon fiber. The jacket of the rotor can be made not only of titanium, but also of copper or some other suitable metal alloy.