Abstract: The present invention relates to pair of saw blades, comprising a first saw blade and a second saw blade which are coaxial and rotating in opposite directions, wherein each saw blade comprises a circular blade body and saw teeth at periphery of the blade body, a gap is arranged between the first saw blade and the second saw blade, the first blade body of the first saw blade is provided with a protrusion protruding toward the second saw blade, and the second blade body of the second saw blade is provided with a groove corresponding to the protrusion. Therefore, it is difficult to cause interference between the two saw blades even though either of the saw blades is deformed.

Abstract: The invention relates to a method for the decoating at least in part of blanks made of metal which are coated on one or both sides in regions, which have a main extension direction, wherein the regions to be decoated can extend in both a straight or curved manner in the main extension direction. The invention further relates to a device for the decoating at least in part of a coated blank in order to carry out the method according to the invention. A method is provided in which the blank is placed on a blank support of a press and during the closing movement of the press at least one scraping knife preferably completely removes the coating of the blank by scraping substantially perpendicular to the main extension direction of the region of the blank to be decoated.

Abstract: A tool for musical string instruments that is to be mounted in contact with a vibrating part of the instrument, made up of two stably coupled portions (11, 13; 16, 17; 25, 26, 27, 28), one made of wood, the other made of a material different from wood.

Abstract: A tuning apparatus for a musical instrument is provided. The instrument includes a neck having a front surface over which a plurality of strings is stretched. The apparatus includes a clamp and a plurality of string-contacting members. The clamp is adapted to removably attach to a desired longitudinal position on the neck. Each of the members is rotatably supported by the clamp and is adapted to rotate on the clamp independently of the other members, this rotation occurring along a plane which is substantially parallel to either a given string or course of strings. Each of the members is further adapted to adjustably impinge upon and urge the given string or course of strings toward a user-selectable one of three different longitudinal positions on the front surface, these positions including a home position, a home?1 position, and a home+1 position.

Abstract: A drum head having a striking feeling similar to an acoustic drum includes an inner head layer and a pair of outer head layers. The outside diameter of the inner head layer is smaller than the outside diameter of a flat part of the outer head layers and the inside diameter of the edge of the shell. The inner head layer is inside the connection part between the flat part and a cylindrical part of the outer head layers and the shell edge part. When tension is applied to the outer head layers, tension is prevented from being applied to the inner head layer.

Abstract: A drumstick holder comprising a single continuous one-piece pliable block or slab out of which are formed specialized functional components, such that the single unit forms all elements necessary to create a fully functional drumstick holder, without addition of any other parts. The holder comprises a unit having a main body, at least one stick holding slot therein and at least one mounting wing thereon. It may include additional elements. A hoop ledge may be extended from the central area of the main body for added stability. The invention, due to its pliable nature, inherently provides substantial shock absorbing and vibration damping qualities.

Abstract: A system and method for quickly and efficiently installing a drum head on a tabla and controlling the tension of individual segments simultaneously. A mechanical interface controls a tension on each of a set of connective elements of a connective assembly that joins the drum head to the mechanical interface. Operation of the mechanical interface adjusts the tension of all elements of the connective assembly, and thus adjusts a playing tension of the drum head, at the same time.

Abstract: A performance-information processing apparatus processes performance information entered thereto. When the performance information is entered in a time interval between (i) a starting time point, at which performance information of one note starts entering and (ii) a first timing, that is a certain time after another performance information of a note has been entered after the performance information of said one note was entered, a tempo determining unit determines a tempo of the performance information, based on the performance information entered in the time interval, and a meter determining unit which determines a meter of the performance information based on the tempo determined by the tempo determining unit.

Abstract: A testing device for testing timbre of a disc player is provided. The testing device may be contained in a computer, or test equipment. The testing device is electronically connected to the disc player for receiving audio signals from the disc player, and analyzing the audio signals to obtain at least one test value for determining the timbre of the disc player. A testing method applied in the testing device is also provided.

Abstract: A musical instrument comprising: (a) plurality of identical vibrating elements; (b) a digitizer associated with each said vibrating element; (c) an estimator that measures the fundamental vibration frequency of said vibrating element; and (d) a synthesized tuner, that conditioned upon at least said estimated fundamental frequency of each vibrating element, generate an audio signal that comprises the characteristics of the original vibration signals with a different fundamental frequency for each said original vibration signal.

Abstract: Touch-sensitive musical instruments with one or more strum sensors and one or more fret sensors, wherein each of the one or more strum sensors and the one or more fret sensors includes a capacitive touch sensor. The touch sensitive musical instrument has an audio module configured to generate an audio signal in response to triggering of the one or more strum sensors, the one or more fret sensors, or a combination thereof.

Abstract: An electro-mechanical musical instrument capable of generating a whole or partial instrument resonant frequency, said instrument comprising a body (1) having a first end (2) and a second end (3), a soundboard (4) positioned between said first and second ends adapted to generate a live frequency response and a contact microphone or sensor (5) adapted to receive said resonant frequency wherein said body includes a rigid member (6) positioned between said first and second ends of said body, said rigid member being adapted to apply tension or compression between said first and second ends of said body and simultaneously contact said soundboard between said first and second body ends such that said application of tension or compression adjusts or modifies said resonant frequency of said instrument.

Abstract: In accordance with various exemplary embodiments, a firearm actuation system is provided. The firearm actuation system, comprising a housing, a guide, a contoured actuation handle, and a bolt. The system provides an actuation mechanism for an AR-15 which is engagable by a shooter where the AR-15 is in a shouldered firing position. The contoured actuation handle may be retained in the retaining slot to provide an action-open-position. The housing may also comprise a mounting rail with a plurality of grooves, where each groove may be configured with a unique indicator.

Abstract: An ambidextrously operated charging handle for use with the M16 family of firearms is provided. The charging handle provides a latch mechanism consisting of two extended handles which are in operational communication with each other. Either handle may be independently retracted to disengage the latch mechanism of the charging handle from the host firearms receiver. The spring-biased mechanism of the charging handle is sheltered within the interior of the charging handle thereby protecting it from the elements. Further, an improved axial pin has been provided to secure the handles of the latch mechanism to the grasping portion of the charging handle.

Abstract: A firearm includes a receiver. A bolt carrier is moveable relative to the receiver between a firing position and a rearward position. A hand guard is coupled to the receiver. A gas tube is disposed at least partially within and fixed relative to the hand guard. A handle assembly is at least partially disposed in the hand guard and is moveable between a forward position and a charging position. The handle assembly has a body and an elongated member extending from the body toward the bolt carrier. The elongated member is disposed about the gas tube and is movable relative to the gas tube between the forward and charging positions. The elongated member engages the bolt carrier to move the bolt carrier from the firing position to the rearward position when the handle assembly moves from the forward position to the charging position.

Abstract: This invention provides a structure for gunpowder charge in multi-frac composite perforation devices that is easy to assemble and transport while the charge volume of gunpowder is increased. In one embodiment of the present invention, an triplet outer gunpowder box is attached onto the outer wall of the charge frame and comprises one middle gunpowder box charged with gunpowder of certain burning rate, and two side-hung gunpowder boxes charged with gunpowder of another burning rate. The two side-hung gunpowder boxes are separately located on the two sides of the middle gunpowder box and are connected with the middle gunpowder box as a unit. The middle gunpowder box is located at a position corresponding to the perforating charge, and has an inner groove for orienting the perforating charge and a through hole through which the jet flow passes.

Abstract: Vessel of the type comprising at least one shaft for receiving at least one missile-launching container (1), characterised in that the launching container (1) is received in the shaft with controlled lateral and axial clearance; the upper portion of the side wall of the container is provided with means for centring/guiding same in the shaft; and the lower end includes a container-bearing base (8) associated with a supporting base (9) of the vessel by means of shock-filtering set-point damping means (10).

Abstract: Inductive or capacitive transmission of energy to a projectile is disclosed. A waveguide can be used to transmit the energy, the electric field being concentrated in the waveguide. The thus used energy transfer system includes at least one waveguide which is arranged or integrated in the region of the muzzle, for example between a muzzle brake and a gun barrel. A transmission coupler for transmission is fed by a signal generator. The projectile comprises at least one sensor which captures the signal and a store in the projectile is charged. Assemblies of the system are used for a V0 measurement as well as to program the projectile.

Abstract: A measurement apparatus is provided, which is included on a measurement and programming basis for a projectile, which detects the fields and/or signals which emerge/originate from a programming coil, and is electrically connected to an evaluation device which itself evaluates these detected values. These values can then be taken into account for the programming of the projectile.

Abstract: An anti-ballistic chair having a chair frame, a seat member secured to the frame, the seat member having an anti-ballistic core portion, and a back support section secured to the frame, the back support member having an anti-ballistic core portion.

Abstract: A system for reducing the effects of a blast wave includes armor plating configured to face a supersonic blast wave. The armor plating has a surface consisting of alternating tall and short peaks with valleys between the peaks. The peaks and valleys are positioned such that the supersonic blast wave reflects from the side surfaces of the tall peaks as a regular reflection that at least partially suppresses Mach reflection of the supersonic wave caused by the short peaks and the valleys. The surface may also be designed to not trap reflected waves. The valleys can be parabolic shaped to deflect and/or dissipate transonic flow that follows the blast wave front.

Abstract: A design for improvement to body armor design which adds a uniquely designed fiberglass diffuser layer with flat topped pedestals to the backside of the prior art of armor which has a debris collection backing layer and a hard faced ceramic facing layer and includes the option to add a protective tear resistant thin polyester film to reduce handling damage resulting in improved protection from armor piercing bullets by further reducing back face deformation of the armor and thus reducing impact to the body.

Abstract: A ballistic panel and procedure to obtain it, for applying it to bullet-proof vests, made of multiple synthetic fiber layers presenting at least one first flexible area and at least one second compact and rigid area.

Abstract: A blast structure and system for use as an outer blast protection component for a personnel cabin for a vehicle, is disclosed. The blast protection system comprises a personnel cabin adapted for receiving a blast structure, the cabin comprising a space forming an interior of the cabin, a floor within the interior of the cabin, the floor having a perimeter section and a removable floor panel centrally disposed therein, a blast structure comprising at least one outer blast panel attachable to the perimeter when the floor panel is removed, and means for attaching and detaching the blast panel to the perimeter section, providing an outer blast protection component to the interior space of the cabin. The attaching/ detaching means include fasteners which are accessible through the interior of the cabin, without breaching the exterior surface of the blast structure.

Abstract: An armored cab comprises a top wall, two side walls, a front wall, a back wall, and a bottom wall, the cab having a longitudinal axis. The bottom wall comprises a generally centrally disposed downwardly facing smooth concave wall portion extending substantially an entire length of the cab and generally parallel to the longitudinal axis of the cab and forming a power train tunnel of the cab, and a pair of opposite laterally disposed wall portions extending substantially the entire length of the cab and generally parallel to the longitudinal axis of the cab, each of the opposite laterally disposed wall portions extending downwardly and laterally inwardly and terminating in a lowermost portion of the bottom wall on either lateral side of the concave wall portion. The concave wall portion and the opposite laterally disposed wall portions are configured so as to present a substantially reduced surface area of the lowermost portions of the bottom wall in a downwardly facing direction.

Abstract: An explosion resistant armor for use on a military vehicle and method of manufacture. The explosion resistant comprises a plurality of tubular core members rigidly secured together in adjacent rank formation. The rigidly secured core members are sandwiched between upper and lower plates, such that each core member is in the form of a chain of integrally interconnected hollow tetrahedrons.

Abstract: The present invention refers to a bulletproof window, in particular for use as a window of a motor vehicle or car, comprising at least one outer pane, at least one inner pane, one or more middle panes arranged between the outer pane and the inner pane, adhesive layers each between respective two panes in a laminate, the outer pane protrudes over the other panes on a peripheral edge of the bulletproof window and the inner pane protrudes over the one or more middle panes on the peripheral edge of the bulletproof window, and a bullet resistant, rigid reinforcement covering at least a part of an inner side of the outer pane at the peripheral edge of bulletproof window, being arranged at least partly between the outer pane and the following middle pane in the extension of an adhesive layer, and being fitted to the inner side of the outer pane.

Abstract: Processes for making high-performance polyethylene multi-filament yarns include the steps of a) making a solution of ultra-high molar mass polyethylene in a solvent; b) spinning of the solution through a spinplate containing at least 5 spinholes into an air-gap to form fluid filaments, while applying a draw ratio DRfluid; c) cooling the fluid filaments to form solvent-containing gel filaments; d) removing at least partly the solvent from the filaments; and e) drawing the filaments in at least one step before, during and/or after said solvent removing, while applying a draw ratio DRsolid of at least 4.

Abstract: The invention pertains to an antiballistic panel. The panel comprises at least a first stack and a second stack, wherein the first stack has a plurality of first laminates made of a first kind of fibers and the second stack has a plurality of second laminates made of a second kind of fibers, wherein the first kind of fibers has a tensile modulus in the range of 40-85 GPa measured according to ASTM D7269 and the second kind of fibers has a tensile modulus in the range of 86-140 GPa measured according to ASTM D7269.

Abstract: A weapon mounting system for a vehicle, such as a helicopter. The weapon mounting system illustratively includes a weapon cradle supporting a machine gun for pivoting movement about a generally horizontal elevational axis. A carriage supports the weapon cradle and is supported by a pintle for rotation about a generally vertical azimuth axis. An ejection collection device is supported by the carriage and collects spent shell casings and links ejected from the machine gun for discharge through the pintle. A trigger assembly illustratively provides for manual operation by a gunner and for remote electrical operation by a pilot.

Abstract: A bolt hold open (BHOA) catch assembly configured for operating with rimfire ammunition for use with a firearm including a receiver with an exposed receiving chamber. A BHOA housing is supported upon the lower receiver in communication with a receiver chamber in communication with a bolt assembly. A catch is supported in elevatable fashion relative to an end of the actuator housing and an end most and downward extending structural portion of the elevatable catch is capable of being manipulated by an externally configured and toggled bolt catch so that an inner pivoting end portion thereof engages the structural portion to raise the BHOA supported catch into contact with a forwardly traveling bolt, such as upon release of a previously retracted charging handle. The BHOA catch can alternatively be actuated upwardly by a suitably configured follower associated with an attachable and cartridge holding magazine, this again following a last shot hold open protocol.

Abstract: An improved gas key assembly for a fire arm, such as an AR 15 or a M4 rifle, having a gas key fastened by fasteners on a bolt carrier assembly where the gas key moves with the bolt carrier when the fire arm is fired, wherein the gas key has a slot for receiving a key element in the slot and the key element has a stem which is seated in the slot and a rail which overlays the fasteners to removably secure the gas key to the bolt carrier and holds gas key resisting unintended separation of the gas key from the bolt carrier. Also the invention includes a method for securing a gas key to a bolt carrier in such a fire arm.

Abstract: A gas system for a firearm having a gas block coupled to a barrel with a gas capture port in communication with a barrel gas port. A sleeve removeably mounted inside the gas block has: a gas conduit; a seat near the gas conduit; a projection; and a rod conduit communicating gas through the projection. A rod movably mounted in the gas block has a cup fitting over the projection. A valve has a knob coupleable to the gas block and a plug moveable within the pressure sleeve with a plunger engageable with the seat to adjust gas flow through the gas conduit to the rod conduit. Gas discharged from a fired cartridge flows against the cup to drive the rod to reload the firearm. The plug is moveable by the knob to a plurality of positions to alter the gas conveyed to the rod.

Abstract: A gas operating system for a firearm includes a gas block, a barrel nut that maintains the gas block at a predetermined axial position on a barrel of the firearm, a member that is movable with respect to the gas block axially with respect to the barrel in response to pressure exerted by expanding propellant gases conveyed thereto by the gas block and a mechanical linkage receiving a force form the member urging it in an axial direction of the barrel and coupled with a loading and ejection mechanism of the firearm to convey the force thereto for operating the loading and ejection mechanism. Various embodiments of gas block assemblies and operating rods for gas operating systems for firearms are provided.

Abstract: A lock valve includes a lock valve body having a bore with a valve spool reciprocatingly received therein. There is a check valve adjacent each end of the bore. Each of the check valves has a check valve member facing the bore and resiliently biased towards a valve seat at each end of the bore. A pressure relief port communicates with the bore near the center thereof and between lands of the valve spool. A pair of spaced-apart grooves are disposed within the spool valve bore. Each groove permits fluid communication past a land of the valve spool when the valve spool is displaced towards one end of the bore by fluid pressure applied to other end of the bore so as to unseat the check valve member adjacent to the one end to the bore and allow pressurized fluid to pass from the one end of the bore, through the groove, and into the relief port.

Abstract: An object of the present invention is to facilitate discharge of foreign matter present around a valve member, while inhibiting degradation of seal performance of the valve member. A shock absorber includes a cylinder portion containing a liquid, a piston valve partitioning a space in the cylinder portion into a first oil chamber and a second oil chamber which contain oil, a piston rod connected to the piston valve and moving in an axial direction of the cylinder portion, a piston nut 43 (cylinder portion 433) forming a channel for the liquid between the first oil chamber and the second oil chamber, and a float valve 52 deformed or displaced depending on the pressure of oil in the channel in the piston nut 43 to open and close the channel. The float valve 52 for the channel member includes a projecting portion 52P and a recessed portion 52M so that, with the position of the float valve 52 adjusted, a gap is formed between the float valve 52 and the piston nut 43 (cylinder portion 433).

Abstract: The present invention relates to a vibration energy harvest device. In the present invention, the vibration energy harvest device is provided for being used to recycle the mechanical energy and thermal energy generated during the vibration, and effectively to improve the power generation efficiency with newly added hydraulic motor and electricity generating unit. Wherein by using an ameliorating valve module and removing the damping hole in the prior art, no matter the damping oil flows from inner cylinder module through hydraulic motor to outer cylinder module or the contrary direction, the flowing damping oil could avoid the hydraulic motor from reciprocating to improve the power generation efficiency.

Abstract: An axial piston unit (1) having bent-axis construction with several guided piston elements (3) longitudinally movable in one rotatable cylinder device (2) and with an area (4) operatively connected with the piston elements (3) and guided with torque. The torque-guided area (4) is constructed to be rotatable around a swivel axis (10), and a displacement of the axial piston unit (1) varies depending on the rotary movement of the torque-guided area (4).

Abstract: A safety pin is provided and which comprises a cylinder having a first port and a second port arranged in longitudinal ends. A piston is moveably disposed within the cylinder and dividing the cylinder into a first chamber in communication with the first port and a second chamber in communication with the second port. A dowel pin is securely attached to the piston. An adjusting device regulates the position of the piston along a position perpendicular to the first and second directions. And a supplying device directing compressed air to the first chamber through the first port, or directing the compressed air to the second chamber through the second port so as to push the piston and the dowel pin to move along the first direction so as for performing locking and unlocking the equipment. By this arrangement, equipment can be readily locked up and unlocked by the provision of the safety pin.

Abstract: An apparatus comprising a crank-slider linkage and a rocker link. The crank-slider linkage has a crank coupled to the slider by a jointed connecting rod. The jointed connecting rod has a first link and a second link. The first link is coupled to the second link by a first revolute joint. The first link is coupled to the crank and has a longitudinal axis. The rocker link has a rocker end and a ground end. The rocker end is coupled to the jointed connecting rod. The ground end is coupled to ground by a second revolute joint. The rocker link and the second link are disposed on a common side of the longitudinal axis.

Abstract: A piston for an air pump has a connecting rod and a sealing valve. The connecting rod has a seat. The seat has a groove and a retaining surface. The groove is defined in an outer surface of the seat. The retaining surface is adjacent to the groove. The sealing valve movably engages the seat of the connecting rod and has an engaging ring and a sealing part. The engaging ring has an inwall which extends into the groove and has an engaging surface facing the retaining surface. The sealing part is connected with the inwall of the engaging ring and sealingly covers the through hole. The sealing valve is not prone to deformation and warpage during the operation of the piston to prevent any operating noise problem.

Abstract: A piston assembly of a reciprocating pump includes a core having a throughbore, a first annular shoulder, a first radial surface that extends from an upper end of the core to a first annular shoulder, and an elastomeric element disposed about the core, where the elastomeric element has a body including a semi-supported section having a first outer radial surface.

Abstract: A method and apparatus are described for swing adsorption processes. The method includes obtaining different plates, wherein the plates have gaseous openings and a utility fluid opening. Then, the gaseous openings are substantially oriented along a common axis for gaseous openings and the plates are diffusion bonded. Once diffusion bonded, the gaseous openings within the module are wash coated with an adsorbent material.

Abstract: Embodiments of the present invention relate to a system and method for efficient removal of sulfur oxides (SOx), nitrogen oxides (NOx) and particulate matter (PM) contained in an exhaust gas generated from fuel combustion and efficient treatment of water containing microorganisms (e.g. ballast water).

Abstract: The present invention relates to a membrane including a reaction product of an epoxy-functional organopolysiloxane and an amino-functional curing agent, wherein the organopolysiloxane has an average of at least two silicon-bonded epoxy-substituted organic groups per molecule and the curing agent has an average of at least two nitrogen-bonded hydrogen atoms per molecule. The invention further relates to a method of separating gas components in a feed gas mixture by use of the membrane.

Abstract: A method of reducing the concentration of at least one sulfur compound in a process stream and for recovering at least one sulfur compound from a process stream are provided. A process stream is delivered to a vessel, wherein the vessel comprises an adsorbent material. At least one solvent is transferred into the vessel. One or more fluids are then removed from the vessel. At least one of the fluids removed from the vessel comprises a clean gas. The adsorbent material may be regenerated to yield a high concentration of the at least one sulfur compound.

Abstract: The invention relates to an increased efficiency high-capacity pressure and/or temperature swing adsorption process comprising: contacting a feedstream at a rate of more than 75 MSCFD with an adsorbent material under conditions sufficient for the adsorbent material to selectively adsorb at least one of the component gases in the feedstream, so as to form a first effluent; and selectively desorbing the adsorbed gas from the adsorption material, so as to form a second effluent The adsorption module can contain rotary valves both on the feed end and on the product end and a rotational member defining a central rotational axis, with the adsorption bed(s) oriented circumferentially thereto. The adsorption bed walls can be angled, the feed end cross-sectional area of the adsorption bed(s) can be larger than the product end, and/or the feed end rotary valve diameter of the module(s) can be larger than the product end.

Abstract: A system and method is provided for removing a condensate from a synthetic gas treatment system. The method includes feeding a first fluid stream into a bottom section of a scrubber chamber defined by a scrubber shell of a scrubber. The first fluid stream includes at least one condensable component. A second fluid stream is fed into a top section of the scrubber chamber, such that the second fluid stream flows in the scrubber chamber in a countercurrent flow direction to the first fluid stream. The second fluid stream contacts the first fluid stream causing the at least one condensable component to form the condensate, such that the condensate and the second fluid stream are collected in the bottom section of the scrubber chamber. The method further includes feeding a third fluid stream into the top section of the scrubbing chamber, such that the third fluid stream contacts the condensate and the second fluid stream and forms an emulsion.

Abstract: The gaseous effluent is contacted with an aqueous solution comprising at least one amine and at least one amine degradation inhibiting compound. A stainless steel withstanding corrosion upon contact with the amine degradation inhibiting compound is first selected. Equipments whose surfaces in contact with the aqueous solution are made from this stainless steel are used.

Abstract: Described is an apparatus useful for mechanically delaying formation of or breaking a pocket and a method of delaying formation of or breaking a gas pocket employing the apparatus.