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    • 2. 发明授权
    • Plasma propulsion apparatus and method
    • 等离子推进装置及方法
    • US4974487A
    • 1990-12-04
    • US252551
    • 1988-10-03
    • Yeshayahu S. A. GoldsteinDerek A. TidmanRodney L. BurtonDennis W. MasseyNiels K. Winsor
    • Yeshayahu S. A. GoldsteinDerek A. TidmanRodney L. BurtonDennis W. MasseyNiels K. Winsor
    • F41B6/00
    • F41B6/00
    • A projectile is accelerated in a barrel bore by applying a plasma jet to a projectile propelling fluid. The plasma jet is derived from a structure forming a capillary passage having a wall formed by a low molecular weight, dielectric powdery filler or water in many rigid containers, shaped as spheres or straw-like tubes having axes parallel to the passage longitudinal axis. The fluid and jet interact so the fluid is heated by the jet, whereby low atomic weight constituents of the fluid are sufficiently heated to become mixed with the plasma to form a high pressure mixture that is injected into the bore to accelerate the projectile. The fluid is dragged into the plasma during mixing to cool the plasma and form a boundary layer between the plasma and the barrel walls so that the mixture does not cause substantial damage to the walls of the bore. The plasma is energized by applying voltage from an electric pulse source to electrodes at opposite ends of the passage. The pulse has a wave shape and duration for initially igniting the plasma source and for thereafter applying energy to the ignited plasma to control the pressure of the mixture. Initially, the fluid cools the plasma without the mixture developing sufficient pressure to accelerate the projectile appreciably. The wave shape and duration are such that the pressure applied to the projectile remains substantially constant while the projectile is being accelerated through the barrel, as occurs during about one-half of the projectile travel time in the barrel.
    • 通过将等离子体射流施加到抛射体推进流体,炮弹在炮筒内加速。 等离子体射流源于形成毛细管通道的结构,该通道具有由许多刚性容器中的低分子量介电粉末填料或水形成的壁,其形状为具有平行于通道纵向轴线的轴的球形或稻草状管。 流体和射流相互作用使得流体被射流加热,由此流体的低原子量组分被充分加热以与等离子体混合以形成注入到孔中的高压混合物以加速射弹。 在混合期间将流体拖入等离子体以冷却等离子体并在等离子体和筒壁之间形成边界层,使得混合物不会对孔的壁造成实质损坏。 通过将来自电脉冲源的电压施加到通道的相对端处的电极来激发等离子体。 脉冲具有用于初始点燃等离子体源的波形和持续时间,并且此后将能量施加到点火等离子体以控制混合物的压力。 最初,流体冷却等离子体,而不会产生足够的压力使混合物明显加速。 波浪形状和持续时间使得当射弹在枪管中的大约一半的射弹行进时间期间发生时,施加到射弹的压力保持基本上恒定,同时射弹被加速通过枪管。
    • 10. 发明授权
    • Electrical power feed assembly for electrothermal gun and cartridge
    • 电热枪和墨盒的电力馈送组件
    • US5544588A
    • 1996-08-13
    • US421396
    • 1995-04-13
    • Rao L. BoggavarapuYeshayahu S. A. GoldsteinCatherine M. KeoghAnthony J. SuchockiMelvin M. Widner
    • Rao L. BoggavarapuYeshayahu S. A. GoldsteinCatherine M. KeoghAnthony J. SuchockiMelvin M. Widner
    • F41A19/58F41B6/00F42B5/08
    • F41B6/00F41A19/58F42B5/08
    • An electrical power feed assembly (12) for supplying high current to an electrothermal gun has first and second electrical connectors (38) and (42) with associated contact portions (40) and (44) for engaging and plastically deforming first and second side contacts (20,22) on a cartridge (14) to provide firing while maintaining the electrical contact without any arcing. The first connector (38) has a curved contact portion (40) that provides an interference fit to plastically deform the first contact (20) and establish the electrical contact as the cartridge (14) is inserted into the gun. The second connector (42) has a pair of curved knife edges (48) that engage and plastically deform the second contact (22) of the cartridge to establish and maintain the electrical contact under spring action of the second connector and by operation of a cam mechanism (50) of a breech block (26) of the gun. The cartridge (14) has its first and second contacts (20,22) made of a relatively soft material, copper and solder preferably, and has the contacts provided with annular shapes that are engaged by the contact portions (40,44) of the first and second connectors (38,42).
    • 用于向电热枪供应高电流的电力馈送组件(12)具有第一和第二电连接器(38)和(42),其具有相关联的接触部分(40)和(44),用于接合和塑性变形第一和第二侧面接触 (20,22)放置在盒(14)上以提供点火同时保持电接触而没有任何电弧。 第一连接器(38)具有弯曲的接触部分(40),该弯曲的接触部分(40)提供过盈配合以使第一触头(20)塑性变形,并且当盒(14)插入枪中时建立电触点。 第二连接器(42)具有一对弯曲的刀刃(48),其接合和塑性地使第二接触件(22)变形,以在第二连接器的弹簧作用下建立和保持电接触,并且通过操作凸轮 枪的后膛块(26)的机构(50)。 盒(14)具有由相对软的材料制成的第一和第二触点(20,22),铜和焊料优选地,并且具有设置有环形形状的触点,所述环形形状与所述接触部分(40,44)接合 第一和第二连接器(38,42)。