Abstract: A phased array ultrasonic testing device for positioning first and second phased array probes relative to a surface of a material to be tested. The testing device includes a first wedge configured to receive and orient the first phased array probe relative to the surface. A second wedge is configured to receive and orient the second phased array probe relative to the surface. A coupling structure is mounted to the first and second wedges and configured to selectively provide for the first and second wedges to move parallel to one another in a first direction and restrict relative movement of the first and second wedges in other directions.

Abstract: Methods, systems and devices for using a LED lighting system to communicate an emergency, indicate a route/pathway and illuminate an area using an existing leaky feeder communications system. The LED lighting system is powered by and may be controlled by the leaky feeder communications system that delivers 2-way communications and data. The LED lighting may be used as area wall location lighting, directional pathway indication, and area illumination. Control of the lighting system may be localized or remotely activated through hard wire or wireless connections. The system may controls dimming, pulsing, brightness, sequencing, and changing LED color.

Abstract: Methods, systems and devices for using a LED lighting system to communicate an emergency, indicate a route/pathway and illuminate an area using an existing leaky feeder communications system. The LED lighting system is powered by and may be controlled by the leaky feeder communications system that delivers 2-way communications and data. The LED lighting may be used as area wall location lighting, directional pathway indication, and area illumination. Control of the lighting system may be localized or remotely activated through hard wire or wireless connections. The system may controls dimming, pulsing, brightness, sequencing, and changing LED color.

Abstract: Methods, systems, apparatus and devices for an arc resistant electrical enclosure that includes a duct system of adjacent pressure relief chambers separated by flame arresting ventilation partitions to provide a torturous mechanical maze to relieve internal pressure and extinguish internal hot flames within the flame arresting duct system prior to exiting the enclosure expelling gasses into the external environment. The adjacent partitioned pressure relief chambers for routing pressure and or flames through the duct system with ninety degree turns from one pressure relief chamber into the next adjacent pressure relief chamber. In an embodiment, a set of ventilation panels is located within one or more of the adjacent pressure relief chambers and each next pressure relief chamber can have a volume that is less than the volume in the preceding chamber.

Abstract: Methods, systems, apparatus and devices for an arc resistant electrical enclosure that includes a duct system of adjacent pressure relief chambers separated by flame arresting ventilation partitions to provide a torturous mechanical maze to relieve internal pressure and extinguish internal hot flames within the flame arresting duct system prior to exiting the enclosure expelling gasses into the external environment. The adjacent partitioned pressure relief chambers for routing pressure and or flames through the duct system with ninety degree turns from one pressure relief chamber into the next adjacent pressure relief chamber. In an embodiment, a set of ventilation panels is located within one or more of the adjacent pressure relief chambers and each next pressure relief chamber can have a volume that is less than the volume in the preceding chamber.