Abstract: A fire extinguishing agent concentration measuring system having a first window, a second window positioned relative to the first window thereby defining a sensing volume between the first window and the second window, and a structure positioned relative to the first window and the second window configured to cause fluid flowing into the sensing volume from an environment within which the fire extinguishing agent concentration measuring system is placed to swirl within the sensing volume.

Abstract: A fire extinguishing agent concentration measuring system including a first window, a second window positioned relative to the first window thereby defining a sensing volume between the first window and the second window, a tube configured to port a flow including the agent from an environment through the sensing volume, and a fluid motion mechanism in operable communication with the tube configured to cause the flow through the tube and through the sensing volume.

Abstract: An aircraft engine fire extinguishing system includes a supply housing for containing a fire extinguishing agent. Also included is a line for routing the fire extinguishing agent from the supply housing. Further included is a nozzle structure operatively coupled to the line, the nozzle structure having a non-circular opening for expelling the fire extinguishing agent.

Abstract: A fire extinguisher discharge nozzle is provided and includes sidewalls and a biasing element. The sidewalls define an aperture through which a medium(s) is dischargeable and are adjustable between multiple first and multiple second positions associated with dilated and constricted conditions of the aperture, respectively. The biasing element is configured to bias the sidewalls toward assuming one of the multiple first or multiple second positions. The sidewalls are drivable toward assuming the other one of the multiple first or multiple second positions in opposition to bias applied by the biasing element in accordance with a characteristic of the medium(s).

Abstract: A fire extinguishing agent concentration measuring system having a first window, a second window positioned relative to the first window thereby defining a sensing volume between the first window and the second window, and a structure positioned relative to the first window and the second window configured to cause fluid flowing into the sensing volume from an environment within which the fire extinguishing agent concentration measuring system is placed to swirl within the sensing volume.

Abstract: A fire extinguishing agent concentration measuring system including a first window, a second window positioned relative to the first window thereby defining a sensing volume between the first window and the second window, a tube configured to port a flow including the agent from an environment through the sensing volume, and a fluid motion mechanism in operable communication with the tube configured to cause the flow through the tube and through the sensing volume.

Abstract: A sensor head assembly for a measurement system for powderised agent includes: an elongate body having a proximal end configured to receive a fibre optic cable, and a distal end; a sensing chamber provided within the elongate body, a first window provided at a proximal side of the sensing chamber and a second window provided at a distal end of the sensing chamber; and a concave mirror mounted within the elongate body at a distal side of the second window, wherein the concave mirror is mounted such that its position within the elongate body is adjustable.

Abstract: A fire extinguisher includes a source conduit, a flow control device connected to the source conduit, and a supply conduit. The supply conduit is connected to the flow control device, is fluidly coupled therethrough to the source conduit, and is thermally coupled to the source conduit to communicate heat between pressurized fire suppression agent entering the flow control device through the source conduit and expanded fire suppression agent issuing from the flow control device through the supply conduit. Fire suppression systems and methods of controlling flow of fire suppressant agents are also described.

Abstract: A low rate discharge section of a fire suppression system includes a low rate discharge conduit with a source segment and a supply segment, a housing connecting the source segment to the supply segment, and an orifice plate. The orifice plate is arranged within the housing, fluidly couples the source segment to the supply segment, and defines two or more orifices therethrough to choke flow of a fire suppressant traversing the orifice plate. Fire suppression and systems and methods of controlling flow of fire suppressant agents through fire suppression systems are also described.

Abstract: A test kit includes a tube arranged to channel smoke generated by a smoke generator, a mount arranged to support the tube relative to the smoke generator in a predetermined orientation and a predetermined spacing relative to the smoke generator, and a sensor. The sensor is arranged for coupling to the tube and generating data indicative of one or more property of the smoked generated by the smoke generator and channeled by the tube to monitor performance of the smoke generator. Test arrangements, test systems, and methods of monitoring smoke generators are also described.

Abstract: Disclosed is a method of fire suppression, comprising: detecting with a sensor a fire stimulus in an environment surrounding the sensor; initiating a first discharge into the surrounding environment, wherein the first discharge comprises an inert gas, carbon dioxide, or any combination(s) thereof; and subsequent to initiating of the first discharge, initiating a second discharge into the surrounding environment, wherein the second discharge comprises a halocarbon.

Abstract: An assembly for a fire extinguisher system includes a fire extinguisher fitting that extends into a fire extinguisher container and a fill adapter. The fitting defines a fitting bore through which a connection portion of a pressure monitoring device at least partially extends and a fitting flange that is disposed about the fitting and is disposed parallel to a flange of the pressure monitoring device. The fill adapter includes an adapter housing and an adapter shaft. The adapter housing is arranged to be disposed about the pressure monitoring device. The adapter shaft that at least partially extends through the adapter housing. The adapter shaft is arranged to engage a monitoring housing of the pressure monitoring device.

Abstract: An aircraft fire suppression system includes a container filled with gases in both a liquefied state and a compressed gas state. The container includes a first tube positioned in the liquefied gas section configured to expel a regulated amount of liquefied gas into the fire suppression system. The container also includes a second tube positioned in the compressed gas section configured to expel a regulated amount of compressed gas into the fire suppression system.

Abstract: A fire extinguisher discharge nozzle is provided and includes sidewalls and a biasing element. The sidewalls define an aperture through which a medium(s) is dischargeable and are adjustable between multiple first and multiple second positions associated with dilated and constricted conditions of the aperture, respectively. The biasing element is configured to bias the sidewalls toward assuming one of the multiple first or multiple second positions. The sidewalls are drivable toward assuming the other one of the multiple first or multiple second positions in opposition to bias applied by the biasing element in accordance with a characteristic of the medium(s).

Abstract: Provided are embodiments including a method, device and system for an interconnected fire detection and extinguishing system that is implemented in an integrated manner The embodiments include a detector for detecting a condition associated with at least one of a fire or smoke, and an extinguisher operably coupled to the detector, wherein the extinguisher includes an extinguishing agent.

Abstract: A fire extinguishing composition includes a propellant, a dry chemical fire extinguishing agent and an anti-decomposition agent.

Abstract: An assembly for a fire extinguisher system includes a fire extinguisher fitting that extends into a fire extinguisher container and a fill adapter. The fitting defines a fitting bore through which a connection portion of a pressure monitoring device at least partially extends and a fitting flange that is disposed about the fitting and is disposed parallel to a flange of the pressure monitoring device. The fill adapter includes an adapter housing and an adapter shaft. The adapter housing is arranged to be disposed about the pressure monitoring device. The adapter shaft that at least partially extends through the adapter housing. The adapter shaft is arranged to engage a monitoring housing of the pressure monitoring device.

Abstract: An aircraft engine fire extinguishing system includes a supply housing for containing a fire extinguishing agent. Also included is a line for routing the fire extinguishing agent from the supply housing. Further included is a nozzle structure operatively coupled to the line, the nozzle structure having a non-circular opening for expelling the fire extinguishing agent.

Abstract: A fire extinguisher includes a main dome surrounding an interior. An internal plate is mounted inside the interior of the main dome, dividing the interior into an internal space housing agent and a secondary internal space. The internal space housing agent and the secondary internal space are both pressurized above ambient. The secondary internal space is free of agent, and can be pressurized, e.g., to no less than the total pressure of the internal space housing agent.

Abstract: A fire extinguisher includes a main dome partially surrounding an internal space housing agent. A secondary dome is mounted to the main dome and is inverted with respect to the main dome. The secondary dome can have a radius of curvature that is equal to, greater than, or less than that of the main dome. The discharge outlet can include a discharge outlet configured to discharge laterally relative to an axis of symmetry of the main dome and the secondary dome.