Abstract: The invention relates to an apparatus for mounting a sighting mechanism on a handgun, with a bracket (2), comprising at least a fixed bracket element and a rotatable bracket element (5) opposite thereto that is rotatable on an axis (20) relative to the bracket (2), which is adjustable by an operating element (19) opposite the fixed bracket element (3). To enable a precisely repeatable and low-wear mounting, the operating element (19) is rotatable relative to the rotatable bracket element (5) on the axis (20) thereof.

Abstract: A shock control fairing for mounting a junction between adjoining aircraft surfaces. The fairing has a cross-sectional profile which varies along the length of the fairing. The cross-sectional profile of the fairing has a maximum area at a location which, when mounted to an aircraft, is substantially proximal to a location on the surface of the aircraft at which a shock would be expected to develop without the fairing.

Abstract: Methods, devices, apparatus and systems for a downward ejecting rifle configured with a trigger and grip mounted forward of a magazine. The rifle includes a receiver with a bolt assembly slidably located therein, a rifle barrel connected with the receiver with a cartridge chamber, the barrel arranged to mate with a bolt mechanism located rearward of the trigger and grip, and a downward ejection port rearward of the magazine to allow a spent casing to eject downward from the rifle. The downward ejection port includes an oversized hollow hammer pivotally connected with a trigger assembly such that after firing the bolt mechanism travels rearward extracting the spent casing over and behind the magazine where it is ejected through the oversize hollow hammer. Downward ejection mechanisms can include a hollow ejection chute reward of the magazine below the hollow hammer with ejected casings passing downward through the ejection chute.

Abstract: A hydraulic drive for an aircraft includes: a gear, a first hydraulic pump and a second hydraulic pump, wherein the gear is installed in a gear housing and wherein the first hydraulic pump and the second hydraulic pump in each case are installed in a pump housing that is affixed to the gear housing, or the two together are installed in a pump housing that is affixed to the gear housing; a hydraulic supply device including a first and a second hydraulic system for operating actuators of the aircraft; and a monitoring and drive device, with the hydraulic supply device including a first hydraulic drive for coupling the latter to a first engine, and a second hydraulic drive for coupling the latter to a second engine, wherein each hydraulic drive includes: a gear drive shaft for coupling the respective hydraulic drive to an engine output shaft of the respective associated engine; two hydraulic pumps that are coupled to a gear output shaft, in each case with a connection device for connecting the hydraulic pump to

Abstract: The invention relates to producing a propellant charge igniter tube (2) for a propellant charge igniter (1) by means of hydroforming (high-pressure forming). According to the present invention, a sleeve base (6) is then joined to the propellant charge igniter tube (2) by means of friction welding, for example, and vulcanized without reworking. In this context, the rubber lips of the sleeve base (6) and the propellant charge igniter tube (2) are molded on, or vulcanized, on in one operation. The vacuum-packed benites (8) and the lower part (9) of the propellant charge igniter (1) can then be mounted in the sleeve base (6).

Abstract: The present invention provides for a stock kit that converts a conventional rifle, such as an SKS, into bullpup configuration. The preferred embodiment of the provided stock kit does not require any permanent modification be made to the host firearm. The stock kit also provides for a rotatable handguard, trigger safety and a magazine release.

Abstract: A supporting half-structure for an aircraft engine nacelle is provided that includes at least one longitudinal beam and a front half-frame, the beam and the half-frame being formed of composite materials. The half frame has an open section, and the half-structure defines a structure selected from the group consisting of: the beam and the front half-frame form a one-piece part; the beam has an extension with an open section, the shape of which matches that of the front half-frame, the extension being attached to the half frame; and the front half-frame has an extension with an open shape, the shape of which matches the beam, wherein the extension is attached to the beam.

Abstract: According to one embodiment, a working vehicle includes: a main change speed mechanism configured to transmit a rotating power, generated by a power source; a first auxiliary change speed mechanism configured to transmit the rotating power, transmitted through the main change speed mechanism, to drive wheels; a second auxiliary change speed mechanism configured to transmit the rotating power to the drive wheels; a first lever configured to operate the first auxiliary change speed mechanism to perform a first auxiliary shift operation; and a second lever configured to operate the second auxiliary change speed mechanism to perform a second auxiliary shift operation, wherein: the first auxiliary change speed mechanism is activated when the second auxiliary change speed mechanism in a neutral state; and the second auxiliary change speed mechanism is activated when the first auxiliary change speed mechanism is in the neutral state.

Abstract: A birdhouse with a plurality of members configurable in a shipping configuration and an operative configuration. In the shipping configuration, the members are stacked in a configuration suitable for shipping. The members are configured to be reconfigured from the shipping configuration to the operative configuration easily and without the use of tools.

Abstract: There is described a convertiplane comprising: a pair of semi-wings; at least two rotors which may rotate about relative first axes and tilt about relative second axes together with first axis with respect to semi-wings between a helicopter mode and an aeroplane mode; first axis being, in use, transversal to a longitudinal direction of convertiplane in helicopter mode, and being, in use, substantially parallel to longitudinal direction in aeroplane mode; convertiplane further comprises at least two through openings within which said rotor may tilt, when said convertiplane moves, in use, between said helicopter and said aeroplane mode.

Abstract: An apparatus comprising a tool body having parallel columns extending from a common base. The base includes a lip extending outward from the columns defining an anvil for receiving a delta ring. A cutter has a body slidably disposed between the columns. A blade extends outward from the cutter body in opposition to the anvil and is aligned by transverse guide pins extending through guide slots in the columns. In operation, a section of the delta ring is positioned between the blade and the anvil. The blade is driven toward the anvil by any of various mechanical, pneumatic, and/or hydraulic mechanisms connected to the stanchion and blade, the simplest of which is a bolt extending through the cutter body and received in a threaded bore in the base. Preferably, the anvil includes a slot for receiving the blade at the extreme of its travel as the ring is severed.

Abstract: A device for controlling the firing of an airsoft gun is provided with a valve under a butt. Pressurized air from a high pressure air canister is directed to a rear section of a chamber in the butt. Opening of a valve directs the pressurized air further into a front section of the chamber via the valve so as to bring a plastic pellet to a ready to fire position. Closing of the valve causes pressurized air in the chamber to push a plunger forward to fire the plastic pellet.

Abstract: Disclosed is a vertical rudder control system for an aircraft. The system is comprised of a rudder trim compensation generator that is configured to generate a rudder trim compensation order to set the position of the rudder bar of the aircraft to a neutral position in which the rudder bar is controlled with nil (i.e., zero) pilot effort. The vertical rudder control system includes a flight control calculator for calculating rudder control orders to maintain the nil effort rudder bar position, with the calculation of the rudder control orders being based on a sum of the rudder bar position, determined by a detection unit, and the rudder trim compensation order. The rudder control orders are received by a rudder operating unit, which is used to deflect the vertical rudder by a deflection value based on the rudder control orders.

Abstract: A system for firearm barrel modification includes a firearm, a collar and an auxiliary barrel. The firearm has a barrel with holes extending inward from the first muzzle end. The barrel has rifling. The collar surrounds the barrel to serve as a securing anchor for an auxiliary barrel. A sleeve slidably engages onto the firearm from the muzzle. The sleeve contains a tubular component, serving as a barrel extension. The tubular component extends from within the sleeve to form a second muzzle at the opposite end. The mating end of the barrel extension is situated within the sleeve. It butts up against the muzzle and is aligned with the rifling of the gun. Alignment rods protrude from the mating end of the tubular component and insert into corresponding holes at the muzzle end of the firearm. A spring member attached to the sleeve sets in place over the collar.

Abstract: A device for transmission and/or generation of torque having a driveshaft and having a driven shaft acted upon by field-excited forces of a magnetorheological medium, the driveshaft terminates in a flange in a housing, at least one cylinder is arranged on the flange (7), and the cylinder extends over the driven shaft coaxially while forming a gap which is filled with the magnetorheological medium.

Abstract: A manpower-driven device has a bi-directional rotational input for providing output to the input end of a constant rotating direction output transmission device, which is used to drive a loading wheel train, wherein the direction of the driving input can be freely selected by the user. The manpower-driven device includes a rotation direction detection device and a sound generator whose sound output depends on the detected rotation direction.

Abstract: A transmission is disclosed for a wheeled vehicle. The transmission has a rotary input (14) to be driven by a rotary power source, e.g. an internal combustion engine. It has a rotary output (16) for driving a vehicle wheel. A transmission unit is coupled between the rotary input and the rotary output to transfer drive between them at a speed ratio which is continuously variable through a range which includes both negative ratios (providing a reversal of rotational direction between the rotary input and the rotary output), positive ratios (in which the rotary input and the rotary output rotate in the same direction), and a geared neutral ratio, in which the rotary output is stationary. In accordance with the invention, the transmission further comprises a brake (20) for braking the rotary output. The brake is provided with a control arrangement adapted to apply it when the speed ratio is set to the geared neutral ratio and to release the brake as the speed ratio is adjusted away from the geared neutral ratio.

Abstract: A gear set is provided for use in a gearbox. The gear set includes a first bevel gear having a first rotational axis and a second bevel gear having a second rotational axis. The second gear is driven by the first gear. The first gear has an outside diameter of about 3.1956 inches, an outer cone distance of about 2.1044 inches, a face width of about 0.62 inches, and a ratio of the outside diameter to a length parallel to the axis of rotation between the crown and the pitch apex of about 1.83. The second gear has an outside diameter of about 2.8337 inches, an outer cone distance of about 2.1044 inches, a face width of about 0.62 inches, and a ratio of the outside diameter to a length parallel to the axis of rotation between the crown and the pitch apex of about 2.33.

Abstract: A forward closure system includes a cylindrical frame. A pair of lune-shaped base sections are mounted to an inside surface of the frame. First and second opposed lune-shaped shell assemblies, each assembly including at least an outer shell section and an inner shell section, are rotatably mounted independently of each other at opposed ends along the rotation axis, the inner section and base sections of each shell assembly nested within the outer section when the forward closure system is in an open position, mating edges of the outer sections abutting one another when the forward closure system is in a closed position. An actuator is coupled to each outer shell section.

Abstract: Disclosed herein are a robot joint driving method, computer-readable medium, and device assembly which conducts motions similar to those of humans, and a robot having the same. These motions are achieved by arranging joint driving devices suited to characteristics of respective joints. The robot joint driving device assembly includes a tendon-type joint driving device using a wire, and a harmonic drive-type joint driving device using a gear reduction method. The tendon-type joint driving device is used to drive a rotary joint requiring high back-drivability, and the harmonic drive-type joint driving device is used to drive a rotary joint requiring high rigidity and high precision.