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.

Abstract: A firearm gas block assembly includes a gas block having a central bore and a retention member passage. The gas block engages a gas block journal of a barrel via the central bore. The retention member passage intersects the central bore to define an opening between the central bore and the retention member passage. A retention member within the retention member passage is moveable between first and second positions. A portion of the retention member extends through the opening when in the first position. No portion of the retention member extends through the opening when in the second position. Gas flow control discontinuities are within a surface of the gas block defining the central passage. A travel limiting member is engaged with the retention member and the gas block for limiting axial movement of the retention member to being between the first and second positions.

Abstract: A method of obtaining velocity of detonation (VOD) information from a borehole wherein an explosive in the borehole is ignited by initiation of a detonator, the method including the steps of using a control circuit which obtains a measurement of the VOD and which is subsequently destroyed by ignition of the explosive, and of transmitting from the borehole a wireless signal which contains the VOD measurement and data which identifies the borehole before the control circuit is destroyed.

Abstract: A method of adding digital functionality to a scope. A scope reticle from the scope is aligned with a virtual reticle from a digital overlay of an electronic display device coupled to the scope. The scope reticle is present in a first coordinate space of the scope image and the virtual reticle is present in a second coordinate space. The alignment of the reticles maps the first coordinate space to the second coordinate space. The coordinate spaces are then locked and the virtual reticle is made invisible, switching from a configure mode to an operate mode. Digital functionality can then be provided to the scope via the digital overlay. This may include an aiming indicator which works with the scope reticle.

Abstract: Provided is a reticle unit that includes a reticle with a sight line; an optical fiber that forms a dot by guiding light from a light source to a center of the sight line; and a frame to which the reticle is attached, wherein a light incident portion for receiving light is formed at one end of the optical fiber protruding out of a cutout portion of the frame, a light-emitting portion for emitting light is formed at another end of the optical fiber, the light incident portion has a spherical surface having a diameter greater than that of the optical fiber, the light-emitting portion has an inclined surface that reflects light passing through the optical fiber, and the optical fiber is fixed along a part of the sight line so that the light-emitting portion is positioned at the center of the sight line.

Abstract: A buffer tube cover assembly includes a cover base assembly and an insert attached to a rear side of the cover base assembly. The cover base assembly includes a cover tube, a lever, a buffer locating portion, a spring, and at least one pin. The insert includes at least one forward protruding member disposed inside the cover base assembly.

Abstract: A firearm accessory mounting device is disclosed, comprising a nut, a collar coupled to the nut, and a follower captured between the collar and within a cam track of the nut. When the nut is rotated relative to the collar, threaded engagement secures the nut to the collar. Once the threaded engagement causes a torque threshold to be reached, further rotation of the nut causes the follower to extend radially inward to create a compressive force on a muzzle device and quickly and stably attach the firearm accessory mounting device.

Abstract: A Single Armament Control Unit (SACU) that operates a single missile tube as opposed to multiple tubes. The SACU provides for interlock pin and umbilical depression from the housing on the rotation of a single crankshaft controlled by a single motor where the rotor of the motor and the rotational axis of the crankshaft are generally parallel to the missile tube.

Abstract: A conducted electrical weapon (“CEW”) deploys wire-tethered electrodes after generation of an ignition signal. The ignition signal is provided to a deployment unit. The deployment unit includes a primer material adjacent a conductor. The conductor conducts the ignition signal outside the primer material. A temperature of the conductor increases in response to receiving the ignition signal. The primer material ignites in response to the increase in temperature of the conductor.

Abstract: A viewing optic has a base and a housing. The housing has a front side, a rear side, a left side, a right side and a top side. The front side, rear side, left side and right side extend upwardly from the base. The top side extends between the upper edges of the front side, rear side, left side and right side. A load absorbing/dispersing component is on at least a portion of the top side. The load absorbing/dispersing component comprises a load absorbing/dispersing material.

Abstract: The present disclosure relates to a shaped charge. The shaped charge includes an explosive component and a liner member coupled to the explosive component. The explosive component and the liner member emit a perforating jet based on ignition of the explosive component. The liner member has a planar symmetric portion that is planar symmetric along an axial length of the planar symmetric portion relative to planes perpendicular to a direction of the emitted perforating jet.

Abstract: A handguard exhaust structure of a firearm includes: a barrel, a piston mechanism parallelly arranged with the barrel in a length direction and a positioning end, a sleeve extended from the positioning end, and a piston member actuating within the sleeve, two exhaust holes are respectively disposed at two sides of the sleeve and arranged to be adjacent to the positioning end; and a handguard allowing the barrel and the piston mechanism to be disposed therein, two divergent stoppers are respectively disposed on the handguard at locations corresponding to the two exhaust holes, each of the divergent stoppers is formed along a length direction of the handguard, a lower diverter hole and an upper diverter hole penetrating the handguard are disposed at two sides of each of the divergent stoppers. Accordingly, effects of lowering the temperature and prevent hands from being burnt are achieved.

Abstract: The present disclosure relates to a switch control method for a rail transit signal system, and an apparatus for the method. When a switch control command of the signal system fails or the signal system confirms agreement with local switch control, the method is configured for performing maintenance operation on a switch via the local switch control apparatus. Compared to the prior art, the present disclosure has the advantages of meeting the requirement of the local switch control, ensuring the safety of a maintenance person and operation, etc.

Abstract: A roll decoupling joint is provided for connecting a rocket motor to a payload. The joint includes a payload adapter, a motor sleeve, a rotational separator and a fastener. The adapter includes an annular socket and a cylindrical core. The socket is bounded by an opening lip and a bulkhead. The payload inserts into the socket through the lip. The core extends axially from the bulkhead opposite the lip. The sleeve is annularly axi-symmetric and inserts into the motor. This sleeve is disposed adjacent to the adapter and around the core supported by the separator. The fastener secures the core to the separator. In various embodiments, the separator constitutes a pair of bearings, and the fastener is a threaded bolt.