Abstract:
A fire protection system wherein a source of extinguishant is connected to a plurality of high-capacity direct discharge nozzles mounted in an elevated position in the space to be protected. The nozzles are activated in a sequence dictated by their proximity to the fire, with the spacing between the nozzles and the configuration of the extinguishant discharge pattern from each nozzle being such that the operation of each nozzle is independent of the operation of the remaining nozzles. Each nozzle has the capacity to discharge the extinguishant at a rate of no less than one-eighth the total capacity of the system.
Abstract:
A sprinkler head for fixed fire extinguishing systems of the type in which a fluid extinguishant is supplied under line pressure to a plurality of such heads, in which the actuation of the head in response to fire is inhibited when line pressure drops below a predetermined magnitude, thereby to preserve the ability of already actuated heads in the system to disperse extinguishant on a fire. In one embodiment, a movable heat shield is employed together with line pressure responsive means for controlling the position of the heat shield with respect to the sprinkler head fuse. In another embodiment, a pressure responsive valve is employed to permit passage of extinguishant through a bleed conduit directly to the fuse thereby to effect cooling thereof.
Abstract:
A device for controlling the flow of fluid, wherein a fluid distributing member is connected to a source of fluid in response to a predetermined temperature condition to establish a fluid flow path in the fluid distributing member. An additional fluid flow path is established in the fluid distributing member in response to a predetermined fluid pressure occurring therein. A fixed fire extinguishing system incorporating the above fluid flow control device.
Abstract:
A shutoff valve for main supply conduits in fluid-handling systems, such as fixed fire protection systems, where it is imperative that the supply conduit remain open at all times except when repairs and other maintenance operations require the system to be shut off. The valve is biased open and includes an actuator which moves the valve to and maintains it in a closed position in response to an energy input, the cessation of which effects return movement of the valve to its normal open position.
Abstract:
A non-Newtonian scrubbing liquid for use in wet scrubbing pollutants from flue gases. The liquid comprises water, a polymeric additive material, preferably one that will complex when contacted with a bi- or trivalent salt, and lime or limestone. The size and stability of droplets formed in spraying such a liquid may be controlled so that they will penetrate a countercurrent of effluent gases. In so doing, the droplets will entrain particulates, including fly ash or sulfides resulting from the reaction of sulfur dioxide gases in the effluent and the lime or limestone, and form a sludge at the bottom of an apparatus. When contacted with a complexing salt, such as borax, the polymeric material in the sludge forms a fishnet structure which entrains the solids but contracts and releases water therefrom.
Abstract:
An on-off fluid control device in which a body member has a passage extending therethrough between an inlet adapted for connection to a source of fluid under pressure and an outlet adapted to be connected to a head for discharging the fluid. A gate valve is operable to selectively close the passage and open the passage in response to temperature variations occurring in the vicinity of the body member. The gate valve is initially maintained in its open position despite the existence of a temperature corresponding to the temperature that would normally move it to its closed position, to prevent jamming or locking of the valve. An assembly incorporating the control device in combination with a pressure responsive control device and a fire protection system incorporating the control device.
Abstract:
A fire protection system in which a plurality of spaced parallel branch conduits extend perpendicular to a plurality of spaced parallel cross-main conduits and are connected thereto to form a network adapted to be supported in an elevated position in a substantially horizontal plane in an area to be protected by fire. Each cross-main conduit is formed by a relatively long tubular portion and a plurality of relatively short tubular portions integral with the long tubular portion and extending perpendicular thereto. The relatively short tubular portions register with the long tubular portion and are spaced apart along the length thereof for the purpose of connecting to the branch conduits, and a plurality of discharge heads are connected to the branch conduits for discharging extinguishant.
Abstract:
The discharge outlet plug of a fire extinguishant nozzle is retained by an external lever system that is conditioned by the operation of a heat fusible means in response to the presence of a first temperature rise to permit release of the plug under fluid pressure in the nozzle. Holding mechanism preferably associated with the lever system is provided to prevent release of the plug unless the nozzle fluid pressure exceeds a predetermined pressure floor, and a temperature responsive override arrangement associated with the lever system is provided to disable the holding mechanism in the presence of a materially higher temperature rise to permit the plug to be expelled by fluid pressures below the pressure floor.
Abstract:
A discharge head for use in a fixed fire extinguishing system including a body member having an inlet and an outlet for receiving and discharging fire extinguishant, and a plug member normally retained in the body member by a latching assembly for preventing the flow of extinguishant through the body member. The latching assembly is adapted to release the plug member in response to a fire occurring in the vicinity of the body member, thus permitting the discharge of the plug member from its flowpreventing position. A fusible member cooperates with the plug and is adapted to fuse at a predetermined temperature to permit the flow of extinguishant through the body member independent of the operation of the latching assembly.