An accelerator for a projectile includes a coil; an H-bridge coupled to the coil with four relays S1-S4, and a controller to control current flow in the coil, wherein when relays S1 and S4 are on and relays S2 and S3 are off, current goes through the coil in one direction, and when the states of the relays are switched, current direction reverses, wherein switching the current direction ensures that the projectile has a positive acceleration.

An electromagnetic launcher with a curved or spiral-shaped, open-ended guideway and conductors for launching a projectile. The projectile, movably retained on or within the guideway, is accelerated along the guideway using electromagnetic forces until it reaches an end of the guideway, then the projectile is launched in a desired direction. The direction of the launch of the projectile is determined by orienting the guideway in the desired direction using an actuator.

The invention relates to a device for projecting a projectile B using a compressed air, in particular provided to be built into a replica weapon, associated with a source of electrical energy. The device comprises a sheath (10) which receives an electromagnetic means (12) for moving a movable piston (34) within the sheath (10) between a thrust nose (14) sealing a front (10-1) of the sheath provided with a projection tube, and a breech (18) sealing a rear (10-2) of the sheath. The invention also relates to a method for controlling the device.

A jewelry display includes a ferromagnetic planar substrate having a front surface opposite a back surface. A bracket is configured to be attached to a wall, the bracket comprising at least one bracket magnet which is a permanent magnet. The back surface of the ferromagnetic planar substrate is configured to removably attach to the bracket due to the magnetic force of the at least one bracket magnet. A plurality of jewelry fixtures are configured to be removably attached to the front surface of the ferromagnetic planar substrate. Each jewelry fixture includes at least one permanent fixture magnet and a jewelry holding structure. The at least one permanent fixture magnet of each jewelry fixture is magnetically attracted to the ferromagnetic planar substrate. The at least one bracket magnet may be at least 2, 5, 10 times or more as powerful as the at least one permanent fixture magnet.

An electromagnetic launcher with a curved or spiral-shaped, open-ended guideway and conductors for launching a projectile. The projectile, movably retained on or within the guideway, is accelerated along the guideway using electromagnetic forces until it reaches an end of the guideway, then the projectile is launched in a desired direction. The direction of the launch of the projectile is determined by orienting the guideway in the desired direction using an actuator.

An electromagnetic launcher with a curved or spiral-shaped, open-ended guideway and conductors for launching a projectile. The projectile, movably retained on or within the guideway, is accelerated along the guideway using electromagnetic forces until it reaches an end of the guideway, then the projectile is launched in a desired direction. The direction of the launch of the projectile is determined by orienting the guideway in the desired direction using an actuator.

The Hyper-Magnetic Matter Accelerator comprises an apparatus and method of a plurality of basin-formed electromagnetic field generators as well as rotational electromagnetic field generators mounted in series to a conduit; energized in sequence for ferrous matter or projectile acceleration to, but not limited to or by high-hypersonic velocity and rotation for trajectory stabilization accuracy. Velocity control may be implemented through the use of various power levels as well as configuration by one skilled in the art based on said artisan's intended velocity objective.

The invention relates to a device for projecting a projectile B using a compressed air, in particular provided to be built into a replica weapon, associated with a source of electrical energy. The device comprises a sheath (10) which receives an electromagnetic means (12) for moving a movable piston (34) within the sheath (10) between a thrust nose (14) sealing a front (10-1) of the sheath provided with a projection tube, and a breech (18) sealing a rear (10-2) of the sheath. The invention also relates to a method for controlling the device.

Provided is a launching apparatus capable of efficiently obtaining water pressure sufficient for launching an underwater payload, including a launch tube, a conduit including a first end portion and a communicating portion communicating with the launch tube, a plurality of conduit coils to axially aligned in a first region between the first end portion and the communicating portion, a plurality of main circuits passing an electric current through respective conduit coils, and a main-circuit control section. The main-circuit control section controls operation of the main circuits to pass electric currents through the conduit coils to generate an axial first magnetic field in the conduit and thereby cause an axial second magnetic field in a moving object, thereby moving the moving object in an advance direction toward a second end portion.

An electromagnetic launcher with a curved or spiral-shaped, open-ended guideway and conductors for launching a projectile. The projectile, movably retained on or within the guideway, is accelerated along the guideway using electromagnetic forces until it reaches an end of the guideway, then the projectile is launched in a desired direction. The direction of the launch of the projectile is determined by orienting the guideway in the desired direction using an actuator.