An apparatus may determine the quality of a fencing blade. The apparatus may include an electrical current source; a fencing blade to be tested for quality; two electrical cables, each connected between the electrical current source and the fencing blade so as to cause current from the current source to travel through at least a portion of the fencing blade; and a magnetic field sensor in sufficient proximity to the fencing blade so as to enable the magnetic field sensor to detect a magnetic field generated by the fencing blade when the current passes through the fencing blade.

An apparatus may determine the quality of a fencing blade. The apparatus may include an electrical current source; a fencing blade to be tested for quality; two electrical cables, each connected between the electrical current source and the fencing blade so as to cause current from the current source to travel through at least a portion of the fencing blade; and a magnetic field sensor in sufficient proximity to the fencing blade so as to enable the magnetic field sensor to detect a magnetic field generated by the fencing blade when the current passes through the fencing blade.

This disclosure relates to systems and methods for using a gyroscope to change the resistance of moving a virtual weapon to simulate a feel of moving the virtual weapon. A feel of moving a virtual weapon may be simulated by determining a position and/or an orientation of a virtual blade of the virtual weapon, determining controls for a gyroscope based on the position and/or the orientation of the virtual blade, and operating the gyroscope in accordance with the controls for the gyroscope to provide resistance to changing the orientation of the hilt, wherein the resistance to changing the orientation of the hilt simulates the feel of moving the virtual weapon.

This disclosure relates to systems and methods for using a gyroscope to change the resistance of moving a virtual weapon to simulate a feel of moving the virtual weapon. A feel of moving a virtual weapon may be simulated by determining a position and/or an orientation of a virtual blade of the virtual weapon, determining controls for a gyroscope based on the position and/or the orientation of the virtual blade, and operating the gyroscope in accordance with the controls for the gyroscope to provide resistance to changing the orientation of the hilt, wherein the resistance to changing the orientation of the hilt simulates the feel of moving the virtual weapon.

A practice sword for practicing martial arts includes a sword hilt body, a blade portion, and a guard portion that separates the sword hilt body and the blade portion. The practice sword is configured such that the sword hilt body and the blade portion have a vinyl chloride pipe as a common core. The blade portion is formed by surrounding the outer surface of the common core vinyl chloride pipe with styrene foam, arranging an elastic cushioning material on a distal surface thereof, and accommodating the styrene foam and the vinyl chloride pipe in a thin and long thick cloth bag. The sword hilt body is formed by abutting top and bottom rod-like pieces of wood against the top and bottom peripheral surfaces of the common core and winding a string around the surfaces of the top and bottom rod-like pieces of wood.

A French grip system includes a “short tang attachment” that firmly attaches to the short tang by using the “Allen Socket Hex Nut” and hex key Allen wrench that is used for pistol grips. The proposed “short tang attachment” is forced against the bell guard assembly by tightening the “Allen Socket Hex Nut” screwed on the end of the short tang. The “short tang attachment” keeps the entire bell guard assembly tightly in place and properly aligned, and it does NOT need to be removed to change the accompanying “slide-on French grips.” The “slide-on French grips” are designed to slide over the “short tang attachment” and are held in place by a “locking pin.” The “locking pin” is inserted into the aligned holes of the “slide-on French grip” and the “short tang attachment.” The “locking pin” is held in place by “grip tape” or a “rubber sleave” around the handle, encasing the “locking pin.” Removal of a “slide-on French grip” may be performed by removing the “grip tape” or “rubber sleave” to pull the “locking pin” from the “slide-on French grip” and “short tang attachment.” With the “locking pin” removed, the “slide-on French grip” may be easily slid off the “short tang attachment” without having to loosen the “bell guard assembly.” By keeping the “bell guard assembly” tightly in place, the risk of cutting the blade wires while changing a French grip is dramatically reduced.

A French grip system includes a “short tang attachment” that firmly attaches to the short tang by using the “Allen Socket Hex Nut” and hex key Allen wrench that is used for pistol grips. The proposed “short tang attachment” is forced against the bell guard assembly by tightening the “Allen Socket Hex Nut” screwed on the end of the short tang. The “short tang attachment” keeps the entire bell guard assembly tightly in place and properly aligned, and it does NOT need to be removed to change the accompanying “slide-on French grips.” The “slide-on French grips” are designed to slide over the “short tang attachment” and are held in place by a “locking pin.” The “locking pin” is inserted into the aligned holes of the “slide-on French grip” and the “short tang attachment.” The “locking pin” is held in place by “grip tape” or a “rubber sleave” around the handle, encasing the “locking pin.” Removal of a “slide-on French grip” may be performed by removing the “grip tape” or “rubber sleave” to pull the “locking pin” from the “slide-on French grip” and “short tang attachment.” With the “locking pin” removed, the “slide-on French grip” may be easily slid off the “short tang attachment” without having to loosen the “bell guard assembly.” By keeping the “bell guard assembly” tightly in place, the risk of cutting the blade wires while changing a French grip is dramatically reduced.

A fixing and clamping device for a sword includes a sword scabbard and a sword body located in the sword scabbard. The top of the sword body is provided with a blade extending above the sword scabbard. A fixing shell matching with the blade is sleeved on the blade. The fixing shell is connected to the blade through a bamboo pin. A first hilt fixing shell and a second hilt fixing shell are sleeved on the fixing shell and matched with the fixing shell. A plurality of clamping blocks are uniformly distributed on the side of the first hilt fixing shell adjacent to the second hilt fixing shell. A plurality of clamping slots matching with the plurality of clamping blocks are uniformly distributed on the side of the second hilt fixing shell adjacent to the first hilt fixing shell.

A fixing and clamping device for a sword includes a sword scabbard and a sword body located in the sword scabbard. The top of the sword body is provided with a blade extending above the sword scabbard. A fixing shell matching with the blade is sleeved on the blade. The fixing shell is connected to the blade through a bamboo pin. A first hilt fixing shell and a second hilt fixing shell are sleeved on the fixing shell and matched with the fixing shell. A plurality of clamping blocks are uniformly distributed on the side of the first hilt fixing shell adjacent to the second hilt fixing shell. A plurality of clamping slots matching with the plurality of clamping blocks are uniformly distributed on the side of the second hilt fixing shell adjacent to the first hilt fixing shell.

A fixing and clamping device for a sword includes a sword scabbard and a sword body located in the sword scabbard. The top of the sword body is provided with a blade extending above the sword scabbard. A fixing shell matching with the blade is sleeved on the blade. The fixing shell is connected to the blade through a bamboo pin. A first hilt fixing shell and a second hilt fixing shell are sleeved on the fixing shell and matched with the fixing shell. A plurality of clamping blocks are uniformly distributed on the side of the first hilt fixing shell adjacent to the second hilt fixing shell. A plurality of clamping slots matching with the plurality of clamping blocks are uniformly distributed on the side of the second hilt fixing shell adjacent to the first hilt fixing shell.