1
Ronald S Hawke, Jonathan K Scudder, Kristian Aaland: Multiple stage railgun. The United States of America represented by the United States Department of Energy, L E Carnahan, Roger S Gaither, Richard G Besha, August 10, 1982: US04343223 (64 worldwide citation)

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 by separate energy sources (14a-n) as the pr ...


2
Ronald S Hawke, Allan R Susoeff: Skirted projectiles for railguns. The United States of America represented by the United States Department of Energy, Henry P Sartorio, Roger S Gaither, William R Moser, January 4, 1994: US05275083 (11 worldwide citation)

A single skirt projectile (20) having an insulating skirt (22) at its rear, or a dual trailing skirt projectile (30, 40, 50, 60) having an insulating skirt (32, 42, 52, 62) succeeded by an arc extinguishing skirt (34, 44, 54, 64), is accelerated by a railgun accelerator 10 having a pair of parallel ...


3
Ronald S Hawke: Low voltage arc formation in railguns. The United States of America represented by the United States Department of Energy, Henry P Sartorio, Clifton E Clouse Jr, Judson R Hightower, November 17, 1987: US04706542 (5 worldwide citation)

A low voltage plasma arc is first established across the rails behind the projectile by switching a low voltage high current source across the rails to establish a plasma arc by vaporizing a fuse mounted on the back of the projectile, maintaining the voltage across the rails below the railgun breakd ...


4
Ronald S Hawke, James R Asay, Clint A Hall, Carl H Konrad, Gerald L Sauve, Mohsen Shahinpoor, Allan R Susoeff: Hybrid armature projectile. The United States of America represented by the Department of Energy, Henry P Sartorio, Roger S Gaither, William R Moser, March 2, 1993: US05191164 (4 worldwide citation)

A projectile for a railgun that uses a hybrid armature and provides a seed block around part of the outer surface of the projectile to seed the hybrid plasma brush. In addition, the hybrid armature is continuously vaporized to replenish plasma in a plasma armature to provide a tandem armature and pr ...


5
Ronald S Hawke: Prevention of breakdown behind railgun projectiles. The United States of America represented by the United States Department of Energy, Miguel A Valdes, Henry P Sartorio, William R Moser, October 13, 1992: US05155290 (4 worldwide citation)

An electromagnetic railgun accelerator system, for accelerating projectiles (14, 15, 114, 214, 314, 414) by a plasma arc (3), introduces a breakdown inhibiting gas into the railgun chamber (26) behind the accelerating projectile (14). The breakdown inhibiting gas, which absorbs electrons, is a halid ...


6
Ronald S Hawke: Prevention of breakdown behind railgun projectiles. The United States of America represented by the United States Department of Energy, Henry P Sartorio, L E Carnahan, William R Moser, September 1, 1992: US05142962 (3 worldwide citation)

An electromagnetic railgun accelerator system, for accelerating projectiles (14, 15, 114, 214, 314, 444) by a plasma arc (3), introduces a breakdown inhibiting gas into the railgun chamber (26) behind the accelerating projectile (14). The breakdown inhibiting gas, which absorbs electrons, is a halid ...