Abstract:
An oxygen measuring apparatus (500) includes an inlet pipe (506) having a first end and a second end, an oxygen sensor (511) arranged inside the inlet pipe (506) between the first end of the inlet pipe and the second end of the inlet pipe, the oxygen sensor (511) having a communication medium (515) disposed thereon and extending through the second end of the inlet pipe (506), a filtering medium arranged (505) inside the inlet pipe between the oxygen sensor (511) and the first end of the inlet pipe, a housing (501) arranged against the second end of the inlet pipe, and a sensor control interface (512) arranged within the housing (501) and in communication with the communication medium (515) of the oxygen sensor (511).
Abstract:
A self-regulating valve controls the flow of high pressure gas discharging from a gas cylinder in a fire suppression system in response to a detection of a fire within a protected space by a two-step process which reduces the pressure rise within the protected space upon release of the fire suppression gas into the protected space.
Abstract:
A method is provided for tuning an oxygen trim controller during the commissioning of a combustion control system for controlling operation of a boiler combustion system, rather than tuning the oxygen trim controller after the commissioning process has been completed.
Abstract:
An elevator door lock assembly (30) includes a sensor device (40) for providing an indication of a properly locked door. A plurality of proximity sensor elements (42, 44) interact with activating elements (52, 54) when the door lock assembly (30) is properly locked. In disclosed examples, a specific geometric pattern of the sensor elements (42, 44) and the activating elements (52, 54) provides redundancy and tampering protection. In a disclosed example, an output from the sensor device (40) provides an indication of a condition of the door lock and a building level location of a plurality of sensor devices.
Abstract:
A hybrid fire suppression system includes a supply of pressurized inert gas, a pipe network connected in inert gas flow communication to the inert gas supply, a first inert gas nozzle, a second inert gas nozzle, and a water storage cartridge having an interior volume defining a water reservoir storing a limited amount of water. The water reservoir communicates with the second inert gas spray nozzle. The first inert gas nozzle connects with the first terminus for introducing a flooding flow of inert gas only into a first protected space. The second inert gas nozzle connects with the second terminus for introducing a flooding flow of inert gas and the limited amount of water from the water reservoir into the second protected space.
Abstract:
An electromagnetic door lock assembly (30) includes a first portion (32) supported relative to hoistway doors (22) and a second portion (34) supported for movement with an elevator car (24). The first and second portions cooperate so that electromagnetic interaction between them unlocks a set of hoistway doors (22) for access to the car (24), for example. In disclosed embodiments, a first portion (32) of the actuator has at least one stationary electromagnetic portion (36A, 36B) and at least one moveable portion (38). The second portion (34) that moves with the car (24) includes at least one stationary electromagnetic portion (44). Magnetic interaction between the first and second portions (32, 34) causes selected movement of the moveable portion (38) for selectively locking or unlocking the doors (22).
Abstract:
An elevator door assembly (20) includes a single vane member (32) associated with a hoistway door (26). A magnetic device (36) on a car door (24) establishes a magnetic coupling with the vane member (32) to cause the hoistway door (26) to move with the car door (24) in at least two opposite directions. In a disclosed embodiment, a control (38) selectively powers the magnetic device (36), which comprises an electromagnet.
Abstract:
A flow splitting device for use in a two-phase flow distribution network includes a side junction tee having a first conduit and a second conduit opening in flow communication to the first conduit, a flow restriction provided in the first conduit upstream of the opening of the second conduit with the first conduit, and a flow barrier extending into the first conduit at a location in the vicinity of a downstream edge of the opening of the second conduit to the first conduit. The ratio of the liquid phase mass flow to the gas phase mass flow is preserved as the mass flow ratio of liquid to gas to each of the two exit streams is substantially equal to the mass flow ratio of liquid to gas in the two-phase flow received by the flow splitting device.
Abstract:
A controlled pressure release valve includes a valve body having a gas inlet for connection to a gas container and a gas outlet for delivering gas to a protected area. The controlled valve comprises a slidable spool housed in the valve body that is slidable between a first position and a second position. The slidable spool has a first end and a second end. A primary flow passage connects the gas inlet and the gas outlet and increases with lineal movement of the slidable spool. The sliding spool is biased towards the first position by a gas pressure applied by the second chamber and a spring.
Abstract:
A controlled pressure release system (10) prevents overpressure in a protected area (14) upon delivery of gas. The system (10) includes a first and a second gas container (12a and 12b), piping (40), a first and second gas outlet 28 and 30), a first differential pressure responsive valve (16a), and a valve (22, 30). The piping (40) has a discharge outlet (24) and connects the first and the second gas containers (12a and 12b) to each other at the first gas outlet (28) and the second gas outlet (32), respectively. The first differential pressure responsive valve (16a) is positioned between the first and second gas outlets (28 and 32). The valve (22, 30) actuates the system (10) and is switchable between a closed position and an open position. When the valve (22, 30) switches to the open position, the first gas container (12a) is in communication with the discharge outlet (24). The first differential pressure responsive valve (16a) opens as a function of a gas pressure differential caused by decreasing gas pressure in the first gas container (12a).