Abstract: An improved system and method for the automated refilling of cryogenic helium is provided. In one embodiment, the system includes a dewar in fluid communication with a liquid helium cryostat through a cryogen transfer line. A controller regulates operation of a three-way valve to pre-cool the transfer line and to cause gaseous helium to flow to the dewar and force liquid helium through the transfer line into the cryostat. The controller is coupled to the output of a cryogenic level sensor, such that the controller regulates the helium liquid level within the cryostat. During filling cycles, the dewar liquid level is also monitored by the cryogenic level sensor and an alarm sounds if the dewar liquid level is undesirably low. Between filling cycles, the controller is operable to ventilate the dewar through a solenoid vent valve in fixed time intervals to ensure the dewar pressure is sufficiently low so as to not bleed liquid helium into the cryostat.

Abstract: An improved system and method for the automated refilling of cryogenic helium is provided. In one embodiment, the system includes a dewar in fluid communication with a liquid helium cryostat through a cryogen transfer line. A controller regulates operation of a three-way valve to pre-cool the transfer line and to cause gaseous helium to flow to the dewar and force liquid helium through the transfer line into the cryostat. The controller is coupled to the output of a cryogenic level sensor, such that the controller regulates the helium liquid level within the cryostat. During filling cycles, the dewar liquid level is also monitored by the cryogenic level sensor and an alarm sounds if the dewar liquid level is undesirably low. Between filling cycles, the controller is operable to ventilate the dewar through a solenoid vent valve in fixed time intervals to ensure the dewar pressure is sufficiently low so as to not bleed liquid helium into the cryostat.

Abstract: An automatic weapon system comprising a bolt driven gas operated machine gun operable in either an open bolt configuration or a closed bolt configuration including a reciprocating bolt assembly operable in either a semi-automatic mode or an automatic mode movable between a rear or open position and a forward or closed position and a firing chamber in combination with an ammunition magazine to automatically feed cartridges from the ammunition magazine to the gas operated machine gun for continuous fire of cartridges from the automatic weapon system including a cartridge feed mechanism to convert the linear motion of the reciprocating bolt assembly into rotary motion to incrementally position a cartridge from the ammunition magazine through a cartridge feed opening formed in the ammunition magazine into the firing chamber as the reciprocating bolt assembly moves between the rear or open position to the forward or closed position.

Abstract: A weapon barrel assembly including Silicon Nitride, Aluminum Oxide and/or Silicon Carbide combined with graphene.