Abstract: Embodiments described herein relate to suppressors for reducing or eliminating sound, flash, and/or heat generated by firearms while discharging projectiles. The suppressor includes a unitary structure containing a cone shaped nozzle disposed at one end of a body. The body has a plurality of baffles surrounding a central bore, a breech end opposite a faceplate, and a plurality of cooling channels spanning a length of the body. Each cooling channel has a first opening at the breech end and a second opening at the faceplate. The unitary structure further contains an outer ring spanning from the breech end to at least the faceplate, a longitudinal wall spanning from the breech end to the faceplate, and a plurality of radially oriented walls extending between the longitudinal wall and the outer ring. The plurality of cooling channels is disposed between the longitudinal wall, the outer ring, and the radially oriented walls.

Abstract: A gas generator includes a plurality of gas discharge ports with a first gas discharge port and a second gas discharge port, the first gas discharge port and the second gas discharge port being configured such that rupturing pressures of a closing member at the first gas discharge port and the second gas discharge port are different from each other, a minimum flow path cross-sectional area of a gas flow path formed by the first gas discharge port is equivalent to a minimum flow path cross-sectional area of a gas flow path formed by the second gas discharge port, and the first gas discharge port and the second gas discharge port are different from each other in at least one of a shape or a peripheral length of an opening on an inner surface side of a housing.

Abstract: A receiver system comprises upper and lower receiver bodies, a lower receiver body, a bolt carrier, and an action-control lever. The upper receiver body is a semi-automatic firearm upper receiver body. The lower receiver body includes a stock mounting flange having a stock receptacle that is matingly engageable with a receiver engaging portion of a stock. The bolt carrier is slidably disposed within a bolt carrier receiving bore of the upper receiver body. The action-control lever has a hand loop and a first attachment arm having a proximate end portion thereof attached to the hand loop. The first attachment arm is pivotably attached at a distal end thereof to the lower receiver body for being pivoted between a battery-ready position and a cartridge-ejecting position relative to the lower receiver body. The action-control lever is attached to the bolt carrier through an articulating coupling assembly.

Abstract: It is sensed that a first guide roller of a first guide roller pair has been worn and/or that a second guide roller of a second guide roller pair has been worn. In an article transport device, a first sensor and a second sensor are attached to a frame, a distance between the first sensor and a first guide roller pair is shorter than a distance between the first sensor and a first wheel, and a distance between the second sensor and a second guide roller pair is shorter than a distance between the second sensor and a second wheel.

Abstract: The present invention relates to zipline systems and control thereof. A zipline system comprising a starting base (1), a finish base (14) and a zipline (2) extended therebetween. The system comprise a trolley (16) arranged on the zipline (2). The trolley (16) comprises two wings (18), harnesses (19) attached to each wing (18) and configured to secure riders (5) of the system. The trolley (16) comprises a thrust generating unit (4) to provide a forward thrust to the trolley (16), an energy storage unit to store energy for the thrust generating unit (4) and a power control unit to control the thrust generating unit (4). Each wing (18) comprises a weight distribution system (20) to balance a centre of gravity of the trolley (16) along its vertical axis (X). The system further comprises a retrieve track (6) to retrieve the trolley (16) back to the starting base (1).

Abstract: Devices, systems and methods of performing a surface operation on a building are provided. The device comprises a plurality of cables removably coupled to a surface of a building, tower or bridge, each of the plurality of cables removably coupled at a different position on the surface; and a body coupled to the plurality of cables at an intersection of the plurality of cables. A length of each cable between the respective position on the surface and the body is automatically adjustable and a tension in each cable is maintained to move the body on the surface. The devices, systems, and methods can be used on buildings, tower, or bridges with complex geometries or irregular surfaces to for example, automatically clean the surface of the building.

Abstract: A chassis locking system includes a bolt having a cross pin and a chassis. The chassis includes a helically inclined surface that contacts the cross pin of the bolt as the bolt is turned, tightening the chassis to a rifle stock.

Abstract: A weapon sighting system and method are provided for engaging distant targets with precision. The system includes an in-line or clip-on weapon sight integrated with a fire control system (FCS) that generates ballistic messages for Elevation (ELEV) HOLD and Windage (WIND) HOLD. A sensor capable of detecting various infrared wavelengths is included, allowing for periscopic or prism transforms based on the ballistic solution for a target. This disclosed system enables shooters to engage targets with high accuracy and precision at extreme ranges without losing sight of the firing solution when increasing magnification.

Abstract: A transfer apparatus includes a first guide rail, a second guide rail, a driving module including a main rail and a moving block that moves along the main rail, and a carriage module coupled to the moving block and supporting an article, wherein the carriage module includes first guide wheels configured to be in rolling contact with the first guide rail and second side guide wheels configured to be in rolling contact with the second guide rail.

Abstract: A payload retrieval apparatus having an extending member having an upper end and a lower end, a channel having a first end and a second end and first and second inner edges defining a tether slot therebetween, wherein the tether slot is configured to guide passage of a tether coupled to a payload retriever suspended from a UAV when the payload retriever is passing within the channel, a first tether engager that extends in a first direction from the first end of the channel adapted to guide the tether towards the channel, a payload holder positioned near the second end of the channel that is adapted to secure a payload, wherein the channel includes a first projection that extends from the first edge into the tether slot so as to hinder removal of the tether from exiting the tether slot once the tether has entered the tether slot.

Abstract: The invention relates to a transport device (I) for transporting a load from a first altitude to a second altitude that is lower than the first altitude while being attached to a guide line (5) and descending along the latter by gravity, comprising: an electric motor (8) for raising the transport device from the second altitude to the first altitude along the line, a first battery (9) for powering the motor, and an electric generator comprising a rotating part and designed to recharge the first battery when the rotating part is caused to rotate under the effect of the descent of the transport device from the first altitude to the second altitude The invention is particularly adapted to zipwire transport.

Abstract: A bogie for a rail-based vehicle, such as a train or tram. The bogie comprises one or more rail wheel arrangements, each having two rail wheels. The rail wheels are driven by a motor arrangement, comprising one or more electrical motors. The operation of the motor arrangement is controlled by alternating signals provided by an inverter arrangement formed in the bogie. The inverter arrangements converts a direct current (power supply) to one or more alternating currents, or one or more alternating current power supplies, for controlling the torque applied by the electrical motor(s) of the motor arrangement.

Abstract: The invention concerns a rail vehicle (1) comprising a first power supply unit (5) which has at least one, preferably at least two, fuel cells (7), at least one fuel storage (8) and a first fuel cell power converter (10). The first fuel cell power converter (10) comprises a DC/DC converter (12) for each fuel cell (7), the DC/DC converters (12) preferably have outputs which are connected in parallel. The first power supply unit (5) is preferably arranged in a powerpack (2).

Abstract: A launching device of a roller coaster, which includes a connecting member. The connecting member is provided with an assembly groove, and two sidewalls of the assembly groove are each provided with a fixing plate. The fixing plate is provided with a magnetic plate assembly. A bottom of the connecting member is connected to a pushing plate. The launching device is arranged on a frame of the roller coaster. A connection concave portion is provided at a location where the pushing plate and the connecting member are connected. A side of the connecting member located at a lower part of the assembly groove is provided with a first mounting corner fitting the connection concave portion.

Abstract: An apparatus and methods are provided for a suppressor to be coupled with a muzzle end of a barrel of a firearm to reduce muzzle blast and muzzle flash. The suppressor comprises a housing having a proximal end and a distal end. A front portion within the housing comprises a series of cylindrical gas expansion chambers for attenuating the temperature and energy of propellant gases accompanying a projectile fired from the firearm. An annular gas expansion chamber surrounds the cylindrical gas expansion chambers and directs a portion of the propellant gases from a rear portion of the suppressor to peripheral vents disposed at the distal end. Lateral chambers within the rear portion deflect and rebound a portion of the propellant gases before passing them into the annular gas expansion chamber. Ledges within the annular gas expansion chamber direct the propellant gases distally through suppressor toward the peripheral vents.

Abstract: A detonator arming assembly for a perforating gun is provided. The detonator arming assembly is integrated into the bulkhead of a perforating gun, such that it can be positioned at either end of a shaped charge positioning tube. The detonator arming assembly is armed when a tandem is threaded into the perforating gun. If not armed, a premature detonation of the internal detonator does not initiate a detonation of the internal detonating cord. If armed, a detonation of the internal detonator causes the detonation of a laterally adjacent detonating cord, which is coupled to each shaped charge in the perforating gun.

Abstract: The invention relates to a single-capacitor electronic detonator (10) comprising an explosive-initiating means (11), electronic control means (16) and a single energy storage capacitor (15) for supplying the electronic control means (16) and the explosive-initiating means (11) with power when firing the single-capacitor electronic detonator (10). It further comprises means (18) for clipping the voltage across the terminals of the single energy storage capacitor (14) to a value lower than a non-firing voltage value (Ua) of the explosive-initiating means (11), and voltage-regulating means (19) connected to means (13) for connecting to a power source (12), which means are suitable for limiting the output voltage to a value lower than a non-firing voltage value (Ua) of the explosive-initiating means (11). The invention also relates to the use thereof in a firing system to improve safety when using single-capacitor electronic detonators (10).

Abstract: The present disclosure relates to a maglev bogie, in particular to a maglev bogie with a centering function and a guiding method thereof. The maglev bogie comprises a maglev guide frame, crank arm brackets, guide wheels, first onboard magnet groups and cylindrical gears, wherein the crank arm brackets are hinged to the four corners of the top and bottom of the maglev bogie, the guide wheels are rotatably connected to the ends of the crank arm brackets, two first onboard magnet groups are slidably connected to each of the two inner sides of the upper part of the maglev guide frame, some of the cylindrical gears are connected to the top of the maglev guide frame where the upper crank arm brackets are hinged, two of the cylindrical gears are rotatably connected to each of the two sides of the top of the maglev guide frame, and every two adjacent cylindrical gears are meshed with each other.

Abstract: The invention relates to a bogie (1) for a guideway-bound levitation vehicle (7) of a magnetic levitation system, with two rows (21, 22) of multiple levitation frames (2) spaced apart from each other in a transverse direction (Y) of the bogie (1) and extending in a longitudinal direction (X) of the bogie (1), with at least two cross members (3) spaced apart from each other in the longitudinal direction (X) and extending in the transverse direction (Y) and connecting the two rows (21, 22) of multiple levitation frames (2) to each other, with at least one longitudinal member (4) extending in the longitudinal direction (X) and connected to the cross members (3), and with at least one receiving means (18) for receiving a vehicle compartment (8) of the levitation vehicle (7).

Abstract: A method for using a trained machine learning (ML) model to determine an ETA of a railcar to a destination and to generate a fleet readiness alert, including: collecting railcar trip information; collecting coordinates of a rail station associated with a rail carrier; creating a joined dataset by combining the trip information and coordinates; performing feature engineering (FE) on the joined dataset to create a feature engineered output including a plurality of engineered features; combining the joined dataset with the feature engineered output to create ML model feature inputs for the trained ML model; and activating the ML model, which accepts the model feature inputs as an input, determines the ETA of the railcar, and generates the fleet readiness alert based on the determined ETA of the railcar, indicating at least a usability status of a fleet of railcars at the depot yard within a fixed time.