Abstract: A lock system includes a plurality of electronic locking devices and a server. The server is configured to receive lock location data regarding a location of each of the plurality of electronic locking devices, receive user device location data regarding a current location of each of a plurality of user devices, deliver access credentials to each of the plurality of user devices according to a geofence delivery protocol based on the lock location data and the user device location data, monitor a current aggregate loading in response to using the geofence delivery protocol, and deliver access credentials to one or more of the plurality of user devices according to a non-geofence delivery protocol in response to the current aggregate loading exceeding a load threshold to reduce the current aggregate loading.

Abstract: A valve assembly for use with an unmanned aerial vehicle is provided and includes an inlet tube, a shuttle, a base plate, a screw assembly, and a spacer block. The shuttle is partially disposed within the inlet tube and is configured to be placed in a first position where the shuttle abuts the inlet tube and a second position where the outer surface is disposed in spaced relation to the inlet tube. The base plate extends between a first end portion that defines a cavity therein and a second end portion. The screw assembly is disposed within the cavity of the base plate and is coupled to a portion of the shuttle. The spacer block is interposed between the second end portion of the inlet tube and the first end portion of the base plate and is configured to maintain the inlet tube and the base plate in spaced relation.

Abstract: An additive manufacturing system comprises a build plane and an energy source configured to direct energy onto a work region of the build plane. An optical detector is configured to receive one or more optical signals from the work region. An optical filter is positioned between the work region and the optical detector, wherein the optical filter includes a first partially transmissive polarized filter having a first polarization axis and a second partially transmissive polarized filter having a second polarization axis. The first polarization axis is rotationally offset from the second polarization axis approximately 90 degrees. The optical filter improves the signal to noise ratio of the optical sensors.

Abstract: Aspects of the disclosure relate to batteries for use in the stratosphere, such as those employed on aerial vehicles. The battery may include an outer case structure, a thermal insulator such as foam arranged within the outer case structure, a battery management unit and a plurality of battery cells both arranged within the thermal insulator, and a heater arranged within the thermal insulator and around the battery cells. In some instances, the battery may also include a thermal reflector arranged between the heater and the thermal insulator, wherein a surface of the thermal reflector is arranged to reflect heat back towards ones of the plurality of battery cells. In some instances, the thermal insulator may include overlapping baffles to reduce an amount of air passing from the outer case and through the thermal insulator. In some instances, the outer case may include a plastic layer with a low emissivity coating.

Abstract: A locking system includes a server, an electronic locking mechanism, and a controller associated with a user. The controller is configured to detect the electronic locking mechanism and acquire lock data therefrom, and transmit the lock data to the server. The server, absent any interaction from the user, is configured to receive the lock data for the electronic locking mechanism, register the electronic locking mechanism to the user, and transmit an access credential for accessing the electronic locking mechanism to a user device associated with the user. The electronic locking mechanism is configured to receive the access credential directly from the user device or indirectly from the user device through the controller and make an access decision based on the access credential, independent of the server.

Abstract: A lock system includes a plurality of electronic locking devices and a server. The server is configured to receive lock location data regarding a location of each of the plurality of electronic locking devices, receive user device location data regarding a current location of each of a plurality of user devices, deliver access credentials to each of the plurality of user devices according to a geofence delivery protocol based on the lock location data and the user device location data, monitor a current aggregate loading in response to using the geofence delivery protocol, and deliver access credentials to one or more of the plurality of user devices according to a non-geofence delivery protocol in response to the current aggregate loading exceeding a load threshold to reduce the current aggregate loading.

Abstract: An implant delivery system, comprising: an implantable device comprising a plurality of supports extending between a proximal end and a distal end, the supports being moveable between a collapsed configuration and an expanded configuration, a proximal guide tube at the proximal end of the supports extending toward the distal end, and a distal guide tube at the distal end of the supports extending toward the proximal end, wherein the proximal and distal guide tubes are telescoping and become further engaged as the supports move from the collapsed to the expanded configuration.

Abstract: A heat transfer system includes an electronic system dissipating heat and a battery pack electrically connected to the electronic system. The battery pack includes a battery housing and a battery cell module disposed within the battery housing. The battery housing surrounds the electronic system such that the heat dissipated by the electronic system is transferred to the battery pack.

Abstract: A motor housing includes a core and a shell having an annular body. The annular body is configured to secure a stator of a motor therein. The annular body includes first and second ends defining first and second openings, respectively. The annular body defines a slot extending along a length of the annular body. The slot is coterminous with the first opening. The core is configured to be in registration with the shell. The core is configured to rotatably support a rotating assembly of the motor including an output shaft. The core includes a base portion, an annular ring, and a guide arm interconnecting the base portion and the annular ring. The core is in registration with the shell when the guide arm is received in the slot of the annular body of the shell to form an interlocking structure.

Abstract: A lock system includes a plurality of electronic locking devices and a server. The server is configured to receive lock location data regarding a location of each of the plurality of electronic locking devices, receive user device location data regarding a current location of each of a plurality of user devices, deliver access credentials to each of the plurality of user devices according to a geofence delivery protocol based on the lock location data and the user device location data, monitor a current aggregate loading in response to using the geofence delivery protocol, and deliver access credentials to one or more of the plurality of user devices according to a non-geofence delivery protocol in response to the current aggregate loading exceeding a load threshold to reduce the current aggregate loading.

Abstract: A lock system includes a plurality of electronic locking devices and a server. The server is configured to receive lock location data regarding a location of each of the plurality of electronic locking devices, receive user device location data regarding a current location of each of a plurality of user devices, deliver access credentials to each of the plurality of user devices according to a geofence delivery protocol based on the lock location data and the user device location data, monitor a current aggregate loading in response to using the geofence delivery protocol, and deliver access credentials to one or more of the plurality of user devices according to a non-geofence delivery protocol in response to the current aggregate loading exceeding a load threshold to reduce the current aggregate loading.

Abstract: A system for an unmanned aerial vehicle can include an altitude control system, which further includes a compressor assembly, a valve assembly, and an electronics assembly. The compressor assembly may include a driveshaft and a bearing assembly configured to rotate the driveshaft. The driveshaft may be formed from a first material and a compressor housing may be formed from a second material. The first and second materials may have different rates of thermal expansion. A dynamic preloading mechanism, such as a flexible plate, may be provided within the compressor assembly to exert a preloading force on the bearing assembly.

Abstract: A system for an unmanned aerial vehicle can include an altitude control system 320, which further includes a compressor assembly 400, a valve assembly 500, and an electronics control assembly 600. The compressor assembly may include a compressor housing 410 that includes a compressor inlet 402, an outlet 202, and a cavity 414 extending therethrough and joining the inlet to the outlet. A diffuser 408 may be coupled to the compressor housing. A motor housing 407 may be disposed within the central cavity at the inlet of the compressor housing, and a compressor motor 406 may be disposed within the motor housing. An impeller 412 disposed within the compressor housing may be coupled to a driveshaft 444 for rotation therewith. The valve assembly may be coupled to an opening 416 of the compressor inlet. The valve head 502 may be configured to move into and away from the inlet opening so as to change a size of the circumferential area of the inlet opening.

Abstract: An altitude control system for an unmanned aerial vehicle includes a compressor assembly defining a plenum therein, a passive valve assembly coupled to a first portion of the compressor assembly and in fluid communication with the plenum, and an active valve assembly coupled to a second portion of the compressor assembly and in fluid communication with the plenum. A method of controlling an altitude of an unmanned aerial vehicle and an unmanned aerial vehicle are also provided.

Abstract: A heat transfer system includes a first component formed of a thermally conductive material and a second component including a surface adapted to capture stray photons to provide heat to the electronic device. The first component is secured and thermally coupled with an electronic device. In particular, the first component includes first and second layers. The first component is in superposed relation with the second component.

Abstract: A heat transfer system includes an electronic system dissipating heat and a battery pack electrically connected to the electronic system. The battery pack includes a battery housing and a battery cell module disposed within the battery housing. The battery housing surrounds the electronic system such that the heat dissipated by the electronic system is transferred to the battery pack.

Abstract: A heat transfer system includes a first component formed of a thermally conductive material and a second component including a surface adapted to capture stray photons to provide heat to the electronic device. The first component is secured and thermally coupled with an electronic device. In particular, the first component includes first and second layers. The first component is in superposed relation with the second component.

Abstract: A heat transfer system includes a first component formed of a thermally conductive material and a second component including a surface adapted to capture stray photons to provide heat to the electronic device. The first component is secured and thermally coupled with an electronic device. In particular, the first component includes first and second layers. The first component is in superposed relation with the second component.

Abstract: A heat transfer system includes a first component formed of a thermally conductive material and a second component including a surface adapted to capture stray photons to provide heat to the electronic device. The first component is secured and thermally coupled with an electronic device. In particular, the first component includes first and second layers. The first component is in superposed relation with the second component.

Abstract: A door assembly includes a door, an electronic locking mechanism, and a camera system. The electronic locking mechanism is coupled to the door. The electronic locking mechanism has a first transceiver configured to facilitate wireless communication with a first external device via a first wireless communication protocol. The camera system is disposed within the door. The camera system has a second transceiver configured to facilitate wireless communication with a second external device via a second wireless communication protocol that is different than the first wireless communication protocol.