Class 124/3 - ELECTROMAGNETIC

Subclass of Class 124 - Mechanical guns and projectors
Definition: Devices for projecting missiles through the air by means
No. of patents: 192
Last issue date: 03/13/2012

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Number	Title	Issue Date
4608908	Electromagnetic launchers with improved rail configurations An electromagnetic projectile launcher is provided with a pair of parallel conductive projectile launching rails which are generally T-shaped with a significant current carrying cross section located symmetrically around a horizontal bore center line. Aug...	09/02/1986
4579340	Basketball return device A basketball return device comprises a portable unit for positioning on a basketball court in a location generally underneath a basket into which shooting practice is to be conducted. The device includes a base with a ball-return mechanism therein and a v...	04/01/1986
4577545	Parallel rail electromagnetic launcher with multiple current path armature Electromagnetic projectile launchers utilize multiple current path armatures in an internally series augmented conductor rail configuration or an internally augmented system connected to multiple power supplies. The current paths include plasmas, conducto...	03/25/1986
4576082	Linear fiber armature for electromagnetic launchers An armature for conducting very large DC current between a pair of electrically conductive rails while being driven along the rails under the influence of electromagnetic forces generated by the application of the current includes a plurality of spiraled ...	03/18/1986
4572964	Counterpulse railgun energy recovery circuit In an electromagnetic launcher such as a railgun for propelling a projectile at high velocity, a counterpulse energy recovery circuit is employed to transfer stored inductive energy from a source inductor to the railgun inductance to propel the projectile...	02/25/1986
4555972	Electromagnetic launcher with powder driven projectile insertion An electromagnetic projectile launching system is provided with an electromagnetic launcher portion and a chemically driven launcher portion. The electromagnetic launcher portion includes a pair of generally parallel conductive rails, a source of high cur...	12/03/1985
4534263	Electromagnetic launcher with high repetition rate switch An electromagnetic projectile launcher is provided with a cartridge-type switch for commutating current from a high current source to a pair of generally parallel conductive rails. A conductive cartridge switch in sliding electrical contact with the rails...	08/13/1985
4527457	Recoilless electromagnetic projectile launcher A recoilless electromagnetic projectile launcher is provided with a pair of projectile launching conductors, a source of high current, a sliding armature for conducting current between the conductors and propelling a projectile, and a structure which crea...	07/09/1985
4485720	Parallel rail electromagnetic launcher with multiple current path armature Electromagnetic projectile launchers utilize multiple current path armatures in an internally series augmented conductor rail configuration or an internally augmented system connected to multiple power supplies. The current paths include plasmas, conducto...	12/04/1984
4480523	Electromagnetic projectile launching system with a concentric rail geometry An electromagnetic projectile launching system utilizes two cylindrical rail configurations. In one configuration, multiple conductive armatures are electromagnetically accelerated along rails which are located on the inner surface of a cylindrical barrel...	11/06/1984
4467696	Electromagnetic projectile launcher with combination plasma/conductor armature An electromagnetic projectile launcher includes a combination plasma/conductor armature structure which serves to conduct current between a pair of generally parallel conductor rails and to propel a projectile along the rails. A plasma at each end of the ...	08/28/1984
4458577	Acceleration apparatus with annular projectile accelerated thereby A high power source of electrical energy, such as a homopolar generator, is connected to a longitudinally extending coaxial structure which forms a gun barrel. Within the gun barrel toward the end to which the power supply is connected is mounted a coaxia...	07/10/1984
4457205	Multiple fiber armatures for electromagnetic launchers An armature for electromagnetic launchers is provided with multiple conductive fibers which form a multi-contact interface with the launcher rails. The fibers are attached to an insulating armature support and can extend across the launcher bore or be att...	07/03/1984
4449441	Electromagnetic projectile launcher with magnetic spin stabilization An electromagnetic projectile launcher is provided with a magnetic field in the path of the projectile. This field induces currents in conductors within the projectile or interacts with a magnetic projectile to produce a torque which imparts spin stabiliz...	05/22/1984
4437383	Muzzle arc suppressor for electromagnetic projectile launcher An electromagnetic projectile launcher having a pair of conductive rails with a breech and a muzzle end and an impedance electrically connected across the conductive rails adjacent the muzzle end of the conductive rails, and a second impedance in the muzz...	03/20/1984
4433607	Switch for very large DC currents An elongated armature can be moved rectilinearly but is preferably rotated between a first position in which it bridges the gap between two parallel rails to short circuit a very large DC current applied to one end of the rails and a second position where...	02/28/1984
4433608	Electromagnetic projectile launcher with an augmented breech An electromagnetic projectile launching system is provided with a rail configuration in the breech area which increases the electromagnetic field to increase armature acceleration and initiate sliding current transfer at a lower current. Two configuration...	02/28/1984
4432333	Electromagnetic projectile accelerator Electromagnetic projectile accelerator comprising stationary coreless coils arranged in a row thus forming a tube. On the interior wall surface of said tube electrically opposite poled plates are mounted establishing an electric field. The magnetic projec...	02/21/1984
4430921	Armature with graded laminations The conductivity of the laminations in an armature which conducts current between the launcher rails or switch rails of an electromagnetic propulsion system is graded such that uniform current density is achieved in each lamination. The conductivity of ea...	02/14/1984
4429612	Method and apparatus for accelerating a solid mass An axi-symmetrical projectile, having a mass ranging from fractions of a gram to kilograms, is accelerated to velocities in the range of 105 to 107 centimeters per second by a propelling force produced by a plasma resulting from elec...	02/07/1984
4429613	Electromagnetic projectile launcher with an automatic plasma formation device An electromagnetic projectile launching system is provided with an automatic plasma armature formation device. An arc created when a conductive armature breaks contact with a pair of conductive rails is commutated through an aperture in one of the rails t...	02/07/1984
4426562	Rotary switch for switching very large DC currents The cylindrical rotor of a switch for switching very large DC currents has a conducting element extending arcuately over a portion of its cylindrical surface and axially therealong. Two stationary brush members extend radially inward toward and axially al...	01/17/1984
4423662	Muzzle arc suppressor for electromagnetic projectile launcher An electromagnetic projectile launcher having a pair of conductive rails with a breech and a nozzle end and an impedance electrically connected across the conductive rails adjacent the muzzle end of the conductive rails, and a second impedance which incre...	01/03/1984
4369692	Switching system for high DC current A switching system for commutating high DC current from a first to a second pair of conductors comprising a switching armature slidably engaging the first pair of conductors, insulating inserts disposed on the first pair of conductors adjacent the second ...	01/25/1983
4369691	Projectile launching system with resistive insert in the breech Resistive inserts are disposed in the breech of a projectile launcher to prevent excessive premature heating, to prevent premature movement of the projectile armature, and to prevent welding of the armature to the projectile rails during the period while ...	01/25/1983
4355561	Projectile launching system with assured current division Series resistance is added to the projectile current loop to assure there will be no premature launching or excessive heating of the projectile armature during the energizing cycle....	10/26/1982
4347463	Electromagnetic projectile launcher with self-augmenting rails A self-augmented parallel rail electromagnetic projectile launcher with a commutating circuit breaker disposed adjacent the breech....	08/31/1982
4343223	Multiple stage railgun A multiple stage magnetic railgun accelerator (10) for accelerating a projectile (15) by movement of a plasma arc (13) along the rails (11,12). The railgun (10) is divided into a plurality of successive rail stages (10a-n) which are sequentially energized...	08/10/1982
4329971	Electromagnetic propulsion power system An electromagnetic propulsion power supply system utilizing mutual induction coils as transformers to provide high currents to the projectile rail conductors....	05/18/1982
4319168	Multistage electromagnetic accelerator A multistage electromagnetic accelerator in which energy is serially induced in stages of parallel rail having serially segmented segments or stages utilizing a high DC current source, circuit breakers, and induction coils with both primary and secondary ...	03/09/1982
4286886	Method and apparatus for controlling the feed of projectiles in a microballistic printer My invention comprises a ballistic impact printer which includes a gun for successively propelling balls to a printing medium spaced from the gun. The balls are fed to the printer from a reservoir and recycled to the reservoir after they have performed th...	09/01/1981
3939816	Gas filled coaxial accelerator with compression coil A self-energized plasma compressor which compresses plasma discharged from coaxial plasma generator. The device includes a helical shaped coil which is coaxially aligned with the center axis of the coaxial plasma generator. The plasma generator creates a ...	02/24/1976

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Class 124/3 - ELECTROMAGNETIC