Abstract: Multi-shot fire metering assemblies and a method for releasing fire extinguishing fluid from a multi-shot fire metering assembly. A multi-shot fire metering assembly may include a first fluid container. The first fluid container may include a first payload area for storing a fire extinguishing fluid. The multi-shot fire metering assembly may include a second fluid container. The second fluid container may be positioned within the first payload area. The second fluid container may include a second payload area for storing the fire extinguishing fluid. The multi-shot fire metering assembly may include a first discharge outlet for directing the fire extinguishing fluid when released.

Abstract: A metering cargo fire inerting assembly is activated to supplement an initial release of fire extinguishing fluid into a cargo hold of an aircraft when a fire is detected during flight. The metering components of the fire inerting assembly control the temperature and pressure of the fire extinguishing fluid within a metering container. A heater element within the metering container controls temperature and pressure. A flow control metering orifice is immersed in a portion of the fire extinguishing fluid sealed by a hermetically sealed disc downstream of the metering orifice. A cutter with an internal fluid flow passageway can pierce the disc to release the fire extinguishing fluid under control of a timer attached to the metering container that can activate a pyrotechnic charge to drive the cutter for releasing the fire extinguishing fluid such as Halon 1301 to a discharge outlet for delivery to the cargo hold.

Abstract: A calibration and verification system and method for dynamically controlling sequential delivery of mixtures containing a fire suppression agent to detection locations to simulate an agent discharge during a flight operation of an aircraft and for allowing direct monitoring of the concentration amounts at the detection locations to adjust a testing operation accordingly. Each of the mixtures is prepared with a precise concentration amount of the agent. The system and method include a remote test sequence unit for determining an optimal testing time period during a flight operation to remotely control the discharge and monitoring of the agent. Prior to the optimal testing time period, an airflow at an altitude of the flight operation is drawn through each of a plurality of detectors to tare out the characteristics of a surrounding environment using a processor, thereby establishing a measurement baseline for each of the plurality of detectors.

Abstract: A calibration and verification system and method for dynamically controlling sequential delivery of mixtures containing a fire suppression agent to detection locations to simulate an agent discharge during a flight operation of an aircraft and for allowing direct monitoring of the concentration amounts at the detection locations to adjust a testing operation accordingly. Each of the mixtures is prepared with a precise concentration amount of the agent. The system and method include a remote test sequence unit for determining an optimal testing time period during a flight operation to remotely control the discharge and monitoring of the agent. Prior to the optimal testing time period, an airflow at an altitude of the flight operation is drawn through each of a plurality of detectors to tare out the characteristics of a surrounding environment using a processor, thereby establishing a measurement baseline for each of the plurality of detectors.

Abstract: An emergency oxygen system for aircraft passengers includes a hermetically welded sealed oxygen cylinder of stainless steel, a welded metal diaphragm sealing a discharge port and an extended hermetically sealed capillary tube for charging the cylinder with pressurized oxygen. A hollow piston cutter is driven to pierce the metal diaphragm as part of a first passageway delivering oxygen to the passenger. A second passageway delivers any leaking oxygen to a release port when the piston cutter is in position. A method of filling the cylinder includes welding to the cylinder a member having a metal diaphragm of a predetermined rupturable characteristic and using the open capillary tube to fill oxygen in the cylinder and subsequently crimping a portion of the capillary tube to provide a hermetic seal. A pressure gauge can be hermetically sealed to the bottom of the oxygen cylinder.

Abstract: An emergency oxygen system for aircraft passengers includes a hermetically welded sealed oxygen cylinder of stainless steel, a welded metal diaphragm sealing a discharge port and an extended hermetically sealed capillary tube for charging the cylinder with pressurized oxygen. A hollow piston cutter is driven to pierce the metal diaphragm as part of a first passageway delivering oxygen to the passenger. A second passageway delivers any leaking oxygen to a release port when the piston cutter is in position. A method of filling the cylinder includes welding to the cylinder a member having a metal diaphragm of a predetermined rupturable characteristic and using the open capillary tube to fill oxygen in the cylinder and subsequently crimping a portion of the capillary tube to provide a hermetic seal. A pressure gauge can be hermetically sealed to the bottom of the oxygen cylinder.