Abstract: An electrical device having a housing containing at least one electrical component and an automatic fire prevention or extinguishing system with at least one heat and/or smoke sensor, the at least one heat and/or smoke sensor is operably connected to a container holding a fire-retarding, fire-extinguishing or fire-prevention material and the container is arranged to dispense the fire-retarding, fire-extinguishing or fire-prevention material into the housing and/or onto the electrical component when the at least one heat and/or smoke sensor detects heat and/or smoke inside the housing, as the fire-retarding, fire-extinguishing or fire-prevention material is dispensed through at least one conduit operably connected to the container holding the fire-retarding, fire-extinguishing or fire-prevention material. Each conduit is arranged to track electrical wiring of the electrical device or track at least part of an outer surface of at least one electrical component of the device.

Abstract: An angle of attack sensor includes a vane assembly and a multi-piece faceplate adjacent the vane assembly. The faceplate includes a heated chassis defining a pocket and a mounting plate positioned adjacent the heated chassis and having an opening. The vane assembly has a portion that is positioned in the pocket of the heated chassis and extends through the opening of the mounting plate.

Abstract: An angle of attack sensor includes a vane assembly and a multi-piece faceplate adjacent the vane assembly. The faceplate includes a heated chassis defining a pocket and a mounting plate positioned adjacent the heated chassis and having an opening. The vane assembly has a portion that is positioned in the pocket of the heated chassis and extends through the opening of the mounting plate.

Abstract: An angle of attack sensor includes a vane assembly and a multi-piece faceplate adjacent the vane assembly. The faceplate includes a heated chassis defining a pocket and a mounting plate positioned adjacent the heated chassis and having an opening. The vane assembly has a portion that is positioned in the pocket of the heated chassis and extends through the opening of the mounting plate.

Abstract: An electrical device having a housing containing at least one electrical component and an automatic fire prevention or extinguishing system with at least one heat and/or smoke sensor, the at least one heat and/or smoke sensor is operably connected to a container holding a fire-retarding, fire-extinguishing or fire-prevention material and the container is arranged to dispense the fire-retarding, fire-extinguishing or fire-prevention material into the housing and/or onto the electrical component when the at least one heat and/or smoke sensor detects heat and/or smoke inside the housing, as the fire-retarding, fire-extinguishing or fire-prevention material is dispensed through at least one conduit operably connected to the container holding the fire-retarding, fire-extinguishing or fire-prevention material. Each conduit is arranged to track electrical wiring of the electrical device or track at least part of an outer surface of at least one electrical component of the device.

Abstract: Iteratively determining compliance of a backup system with a service level agreement (SLA) of service level policies (SLPs), including receiving an SLP having a data management schedule and indicating a first backup time of a first backup job; determining an SLP schedule type of windowed or continuous based on the SLP, and a first compliance analysis time based on the SLP schedule type and the first backup time; determining a first monitoring event associated with the first compliance analysis time and with a first compliance analysis type; performing a first compliance analysis of the first compliance analysis type to generate a first compliance status of the first monitoring event; and creating a second monitoring event associated with a second analysis time based on the first compliance status, and with a second compliance analysis type, and being based on the first compliance status.

Abstract: An angle of attack sensor includes a housing, a heated chassis positioned at least partially within the housing and defining a pocket, a mounting plate positioned adjacent the heated chassis and having a circular opening, an external surface facing away from the housing, and an internal surface facing toward the housing, and a vane assembly extending through the circular opening of the mounting plate. The vane assembly includes a vane extending from a root to a tip and a vane base connected to the root of the vane and positioned within the pocket of the heated chassis such that the vane base is offset inwardly from the external surface toward the housing.

Abstract: An angle of attack sensor includes a vane that is freely rotatable to align with a direction of an oncoming airflow over the vane. The airfoil includes a root proximate a vane hub that connects to a rotatable shaft, a tip opposite the root, a leading edge, a trailing edge opposite the leading edge, a first lateral face, a second lateral face, and a heating element disposed within the airfoil between the first and second lateral faces proximate the leading edge. The first lateral face extends from the leading edge to the trailing edge. The second lateral face is opposite the first lateral face and extends from the leading edge to the trailing edge. The first and second lateral faces are symmetric about a chord of the airfoil and each have an outer surface profile that is nonlinear and geometrically convex from the leading edge to the trailing edge.

Abstract: In one aspect, implantable wireless microstimulators are described herein. In some embodiments, a microstimulator described herein includes an energy harvesting circuit configured to receive an input signal and generate an electrical signal based on the received input signal. The microstimulator further comprises a diode rectifier in series with the energy harvesting circuit. The diode rectifier is configured to rectify the electrical signal. The energy harvesting circuit and the diode rectifier can be encapsulated within a biocompatible electrically insulating material. Additionally, in some cases, an electrical interface is exposed through the biocompatible electrically insulating material. A microstimulator described herein can also include a nerve cuff. The nerve cuff can be configured to receive a monophasic neural stimulation pulse through the electrical interface of the micro stimulator.

Abstract: The bearings of aircraft angle of attack (AOA) vanes are susceptible to lightning strike damage, which causes fluting on the inner and outer races of the bearings and causes the bearings to generate friction, noise, and vibrations. To prevent the bearings from experiencing damage due to lightning strikes, the bearings, the shaft, and/or the mounting plate are configured to create an electric isolator to prevent the electric current from the lightning strike from passing through the bearings, thereby preventing the bearings from incurring lightning strike damage.

Abstract: An angle of attack sensor includes a housing having an open first end and a closed second end, a heated chassis positioned within the open first end of the housing, a mounting plate positioned on the heated chassis adjacent the open first end of the housing such that an internal chamber is formed between the heated chassis and the mounting plate, a transducer compartment between the heated chassis and the closed second end of the housing, and a water management system located adjacent the internal chamber and the transducer compartment. The water management system includes an annular chamber positioned in the internal chamber, a first tube at a first end of the annular chamber, and a second tube at a second end of the annular chamber. The first tube has a hole such that the first tube is in fluid communication with the annular chamber and the internal chamber, and the second tube is in fluid communication with the annular chamber and the transducer compartment.

Abstract: An angle of attack sensor includes a housing, a heated chassis positioned at least partially within the housing and defining a pocket, a mounting plate positioned adjacent the heated chassis and having a circular opening, an external surface facing away from the housing, and an internal surface facing toward the housing, and a vane assembly extending through the circular opening of the mounting plate. The vane assembly includes a vane extending from a root to a tip and a vane base connected to the root of the vane and positioned within the pocket of the heated chassis such that the vane base is offset inwardly from the external surface toward the housing.

Abstract: An angle of attack sensor includes a housing having an open first end and a closed second end, a heated chassis positioned within the open first end of the housing, a mounting plate positioned on the heated chassis adjacent the open first end of the housing such that an internal chamber is formed between the heated chassis and the mounting plate, a transducer compartment between the heated chassis and the closed second end of the housing, and a water management system located adjacent the internal chamber and the transducer compartment. The water management system includes an annular chamber positioned in the internal chamber, a first tube at a first end of the annular chamber, and a second tube at a second end of the annular chamber. The first tube has a hole such that the first tube is in fluid communication with the annular chamber and the internal chamber, and the second tube is in fluid communication with the annular chamber and the transducer compartment.

Abstract: An angle of attack sensor includes a vane assembly and a multi-piece faceplate adjacent the vane assembly. The faceplate includes a heated chassis defining a pocket and a mounting plate positioned adjacent the heated chassis and having an opening. The vane assembly has a portion that is positioned in the pocket of the heated chassis and extends through the opening of the mounting plate.

Abstract: Iteratively determining compliance of a backup system with a service level agreement (SLA) of service level policies (SLPs), including receiving an SLP having a data management schedule and indicating a first backup time of a first backup job; determining an SLP schedule type of windowed or continuous based on the SLP, and a first compliance analysis time based on the SLP schedule type and the first backup time; determining a first monitoring event associated with the first compliance analysis time and with a first compliance analysis type; performing a first compliance analysis of the first compliance analysis type to generate a first compliance status of the first monitoring event; and creating a second monitoring event associated with a second analysis time based on the first compliance status, and with a second compliance analysis type, and being based on the first compliance status.

Abstract: An angle of attack sensor includes a vane that is freely rotatable to align with a direction of an oncoming airflow over the vane. The airfoil includes a root proximate a vane hub that connects to a rotatable shaft, a tip opposite the root, a leading edge, a trailing edge opposite the leading edge, a first lateral face, a second lateral face, and a heating element disposed within the airfoil between the first and second lateral faces proximate the leading edge. The first lateral face extends from the leading edge to the trailing edge. The second lateral face is opposite the first lateral face and extends from the leading edge to the trailing edge. The first and second lateral faces are symmetric about a chord of the airfoil and each have an outer surface profile that is nonlinear and geometrically convex from the leading edge to the trailing edge.

Abstract: In one aspect, implantable wireless microstimulators are described herein. In some embodiments, a microstimulator described herein includes an energy harvesting circuit configured to receive an input signal and generate an electrical signal based on the received input signal. The microstimulator further comprises a diode rectifier in series with the energy harvesting circuit. The diode rectifier is configured to rectify the electrical signal. The energy harvesting circuit and the diode rectifier can be encapsulated within a biocompatible electrically insulating material. Additionally, in some cases, an electrical interface is exposed through the biocompatible electrically insulating material. A microstimulator described herein can also include a nerve cuff The nerve cuff can be configured to receive a monophasic neural stimulation pulse through the electrical interface of the micro stimulator.

Abstract: The bearings of aircraft angle of attack (AOA) vanes are susceptible to lightning strike damage, which causes fluting on the inner and outer races of the bearings and causes the bearings to generate friction, noise, and vibrations. To prevent the bearings from experiencing damage due to lightning strikes, the bearings, the shaft, and/or the mounting plate are configured to create an electric isolator to prevent the electric current from the lightning strike from passing through the bearings, thereby preventing the bearings from incurring lightning strike damage.

Abstract: A mount includes a keyed insert and a key receiver. The keyed insert includes a key base and a keyed plate mounted to the key base and having one or more key features extending from a periphery of the keyed plate. The key receiver accepts the keyed insert and includes a receiver base, a retaining ring, a key set ring, a key entrance ring, and a spring plate. The retaining ring is connected to the receiver base. The key set ring is disposed between the retaining ring and the receiver base and includes one or more receiving notches and one or more locking notches. The one or more receiving notches is configured to receive the one or more key features the one or more locking notch is spaced away from the one or more receiving notch and is configured to lockingly engage the one or more key features.

Abstract: In one example, an apparatus for holding a display device includes a back plate and a plurality of engaging members disposed around a periphery of the back plate. The back plate includes a rear face and a front face opposite the rear face. The plurality of engaging members extend from the back plate in a direction from the rear face to the front face to define an outer boundary of a retention space configured to accept the display device. The plurality of engaging members includes a rotatable engaging member configured to rotate between an engagement position and a disengagement position. The engagement position is configured to secure the display device within the retention space. The disengagement position is configured to allow removal of the display device from the retention space.