Abstract: A frame piece of a frame for a luminaire is disclosed. The frame piece can include an inner surface, a first frame coupling feature disposed at a first end of the frame piece, and a second frame coupling feature disposed at a second end of the frame piece. The first frame coupling feature can be configured to mechanically couple to the second frame coupling feature of a first adjacent frame piece. The second frame coupling feature can be configured to mechanically couple to the first frame coupling feature of a second adjacent frame piece. The inner surface forms a partial opening through which a light source component can traverse.

Abstract: For travel on a cable, the zipline trolley includes a wheel, a brake, a frame, a hanger, and a lower slot. The wheel is disposed on a proximal end of a frame. The wheel includes a groove that receives a cable at a lower portion of the wheel and a wheel bearing. The brake is disposed on a distal end of the frame. The brake is connected to a given lever point and includes a groove along a brake bottom that receives the cable. The frame includes an array of lever points disposed between the brake and the wheel. The hanger is connected to a given lever point and suspends a weight. The weight applies a force about the wheel to the brake to control a rate of descent of the device along the cable. The lower slot receives the cable.

Abstract: A distributed low voltage power system is disclosed herein. The system can include a power source generating line voltage power, and a first line voltage cable having a first line voltage end and a second line voltage end, where the first line voltage end is coupled to the power source. The system can also include a first power distribution module (PDM) comprising a first power transfer device and a first output channel. The system can further include a first LV cable having a first LV end and a second LV end, where the first LV end is coupled to the first output channel of the first PDM. The system can also include at least one first LV device operating on the first LV signal, where the second LV end of the first LV cable is coupled to the at least one first LV device.

Abstract: Disclosed is a brake system for aircraft that uses a control unit that is configured to control actuators at each wheel using one channel operating an associated brake control module, and other actuators at the same wheel using a second module operated completely independently using a second module. The use of the first and second groups of actuators are alternated periodically, e.g., for each flight.

Abstract: A distributed low voltage power system is disclosed herein. The system can include a power source generating line voltage power, and a first line voltage cable having a first line voltage end and a second line voltage end, where the first line voltage end is coupled to the power source. The system can also include a first power distribution module (PDM) comprising a first power transfer device and a first output channel. The system can further include a first LV cable having a first LV end and a second LV end, where the first LV end is coupled to the first output channel of the first PDM. The system can also include at least one first LV device operating on the first LV signal, where the second LV end of the first LV cable is coupled to the at least one first LV device.

Abstract: A light socket configuration originally intended for light sources based on technologies other than light emitting diodes (LEDs) can be upgraded to accommodate an LED light source. The upgraded socket can be backward compatible with the non-LED light sources and thus may accommodate both LED- and non-LED-based light sources. The upgrade can comprise adding heat management technology to the light socket to address heat sensitivity of LED light sources. A structural portion of the socket can be formed from a material that has a relatively high thermal conductivity in order to conduct heat away from the LED light source. The socket may include heat dissipating fins. An associated heat spreader or heat sink can spread, sink, dissipate, or otherwise manage the heat conducted away from the LED light source.

Abstract: A lighting device includes a housing and a power connector attached to the housing. The lighting device also includes a wireless lighting control device positioned inside the housing. The wireless lighting control device includes a wireless transceiver to wirelessly receive lighting control instructions and a control interface circuitry compatible with a lighting fixture driver. The wireless lighting control device further includes a controller communicably coupled to the wireless transceiver and to the control interface circuitry. The controller is configured to control the control interface circuitry based on the lighting control instructions received by the wireless transceiver.

Abstract: A distributed low voltage power system is disclosed herein. The system can include a power source generating line voltage power, and a first line voltage cable having a first line voltage end and a second line voltage end, where the first line voltage end is coupled to the power source. The system can also include a first power distribution module (PDM) comprising a first power transfer device and a first output channel. The system can further include a first LV cable having a first LV end and a second LV end, where the first LV end is coupled to the first output channel of the first PDM. The system can also include at least one first LV device operating on the first LV signal, where the second LV end of the first LV cable is coupled to the at least one first LV device.

Abstract: An electrical device can have an associated wiring box for connecting the electrical device to an external electrical supply, for example to utility power. The wiring box can include an opening suitable for worker access, so that a worker can connect or disconnect the electrical device from electrical power. Wiring connectors can be rotatably mounted in the wiring box for making the electrical connection. The wiring connectors can be rotated to one orientation to enhance worker access through the opening, for example during installation, and to another orientation for long-term operation.

Abstract: A frame piece of a frame for a luminaire is disclosed. The frame piece can include an inner surface, a first frame coupling feature disposed at a first end of the frame piece, and a second frame coupling feature disposed at a second end of the frame piece. The first frame coupling feature can be configured to mechanically couple to the second frame coupling feature of a first adjacent frame piece. The second frame coupling feature can be configured to mechanically couple to the first frame coupling feature of a second adjacent frame piece. The inner surface forms a partial opening through which a light source component can traverse.

Abstract: A distributed low voltage power system is disclosed herein. The system can include a power source generating line voltage power, and a first line voltage cable having a first line voltage end and a second line voltage end, where the first line voltage end is coupled to the power source. The system can also include a first power distribution module (PDM) comprising a first power transfer device and a first output channel. The system can further include a first LV cable having a first LV end and a second LV end, where the first LV end is coupled to the first output channel of the first PDM. The system can also include at least one first LV device operating on the first LV signal, where the second LV end of the first LV cable is coupled to the at least one first LV device.

Abstract: A frame piece of a frame for a luminaire is disclosed. The frame piece can include an inner wall, a first frame coupling feature disposed at a first end of the frame piece, and a second frame coupling feature disposed at a second end of the frame piece. The first frame coupling feature can be configured to mechanically couple to the second frame coupling feature of a first adjacent frame piece. The second frame coupling feature can be configured to mechanically couple to the first frame coupling feature of a second adjacent frame piece. The inner wall can have a first shape and a first size that is substantially similar to a second shape and a second size of a portion of a housing of the luminaire.

Abstract: A data storage device is disclosed comprising a spindle motor configured to rotate a disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings of the spindle motor are commutated based on a commutation sequence while applying a periodic driving voltage to each winding. During a seek operation to seek the head a seek length, an amplitude of the periodic driving voltage is adjusted according to a driving profile corresponding to the seek length, wherein the driving profile compensates for a power disturbance during the seek operation.

Abstract: An electrical device can have an associated wiring box for connecting the electrical device to an external electrical supply, for example to utility power. The wiring box can include an opening suitable for worker access, so that a worker can connect or disconnect the electrical device from electrical power. Wiring connectors can be rotatably mounted in the wiring box for making the electrical connection. The wiring connectors can be rotated to one orientation to enhance worker access through the opening, for example during installation, and to another orientation for long-term operation.

Abstract: A data storage device is disclosed comprising a disk, a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings of the spindle motor are commutated based on a commutation sequence while applying a periodic driving voltage to each winding, wherein the periodic driving voltage comprises an operating amplitude during normal operation. When a supply voltage falls below a threshold, the spindle motor is configured into a power generator by at least adjusting the amplitude and a phase of the periodic driving voltage so that a periodic current flowing through each winding is substantially opposite in phase from a sinusoidal back electromotive force (BEMF) voltage generated by each winding.

Abstract: A data storage device is disclosed comprising a disk, a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings are commutated based on a commutation sequence while applying a periodic driving voltage to each winding, wherein the periodic driving voltage comprises an operating amplitude during normal operation. When a supply voltage falls below a threshold, the spindle motor is configured into a power generator by at least adjusting a phase of the periodic driving voltage by a phase offset and adjusting the amplitude of the periodic driving voltage based on the phase offset.

Abstract: A data storage device is disclosed comprising a first disk surface comprising servo data defining servo tracks at a first radial density, a first head, and a voice coil motor (VCM) configured to actuate the first head over the first disk surface using a servo control system. A load operation is executed to load the first head over the first disk surface, and a back electromotive force (BEMF) voltage generated by the VCM during the load operation is evaluated to generate an estimated distance traveled. The servo data on the first disk surface is detected, and an initial servo track during the load operation based on the detected servo data to generate a measured distance traveled. A gain of the servo control system is configured based on the estimated distance traveled and the measured distance traveled.

Abstract: A distributed low voltage power system is disclosed herein. The system can include a power source generating line voltage power, and a first line voltage cable having a first line voltage end and a second line voltage end, where the first line voltage end is coupled to the power source. The system can also include a first power distribution module (PDM) comprising a first power transfer device and a first output channel. The system can further include a first LV cable having a first LV end and a second LV end, where the first LV end is coupled to the first output channel of the first PDM. The system can also include at least one first LV device operating on the first LV signal, where the second LV end of the first LV cable is coupled to the at least one first LV device.

Abstract: A light emitting diode (LED) driver case includes a housing, driver circuitry, an recessed area in the housing, and a luminaire disconnect. The luminaire disconnect is coupled to the recessed area in the housing and extends toward an aperture in a top plate of a LED module. The luminaire disconnect can be fixedly or removably coupled to the recessed area in the housing. When the luminaire disconnect is removably coupled to the recessed area, one or more of a number of retaining features can be used to prevent the luminaire disconnect from moving or to limit the movement of the luminaire disconnect.

Abstract: A bipod foregrip includes a longitudinally extending mounting base constructed to slidingly engage a mounting rail of a firearm. A fixed gripping portion is affixed to the base adjacent the rear end. A movable gripping portion has a first end pivotally attached adjacent a lower extremity and pivotal between a stored orientation and an extended orientation. The opposed end is positioned in abutting engagement with a lower surface of the mounting base in the stored orientation. Two legs form the movable gripping portion in the stored orientation and extend angularly outwardly and downwardly into a bipod rest in the extended orientation.