Abstract: A method of sampling and confining chemical contaminations intended for the chemical analysis of contaminations in particulate and/or molecular form with prior adsorption by a support or trapping in a liquid. The adsorbent support or the contaminated liquid is then held in position in a closed box or sealed container having chemically inert walls. The outside of the closed box or sealed container is brought into contact with a gas at a higher pressure than the pressure inside the box or container and then the temperature inside the closed box or sealed container is regulated from an environment external to the gas.

Abstract: The present invention includes a system and method for the management of specimens ordinarily manipulated via tubes. The invention may include a flexible, removable tube holder that is linear when placed in a rack and curved when placed into a centrifuge rotor. The system provides for the elimination of manual recording of the individual tubes, and also provides for the transference of the tubes from the rack to the centrifuge and back in a group.

Abstract: A mechanical linear actuator having a tubular member that is defined by a housing for rotatably and axially supporting a circular nut, a lead screw is mated to the circular nut so that it can move axially in and out of the tubular member. A torsion spring clutch brake is wound about the circular nut to normally brake the nut and thus prevent the lead screw from moving into or out of the tubular member. An unlocking mechanism can remotely unwind the torsion spring clutch brake to sufficiently release the circular nut and thus allow the lead screw to pass in and out of the tubular member. An adjustable stop is provided for adjusting the stroke of the actuator.

Abstract: A configuration of a gear wheel (4, 5) on a main shaft (1) of a transmission, having at least two lay shafts (2, 3). The wheel (4, 5) is designed as a sum wheel or gear wheel, meshes with both of the lay shafts (2, 3), and is movable in the radial direction between lay shafts (2, 3). An elastic element (8, 13) is positioned, between the gear wheel (4, 5) and the main shaft (1), and/or between the gear wheel and the lay shaft to reduce radially movement of the gear wheel (4, 5).

Abstract: A multi-cycle ball screw comprises a screw, a nut, a plurality of balls and circulating caps. The screw is provided with at least two screw helical grooves in an outer surface thereof. The nut is provided with nut helical grooves opposite to the screw helical grooves. The balls are disposed between the helical grooves of the screw and the nut. Each circulating cap is provided with a circulating groove having an opening at both ends thereof and a guiding portion between the two openings. The circulating caps are connected to two points of one screw helical groove by two openings thereof while the guiding portion thereof crosses over the other screw helical groove. By repeating this cooperation method, a multi-cycle ball screw can be formed.

Abstract: A composite body, such as a gear wheel or torsional vibration damper, including a radially inner hub body provided with outer profiles, a surrounding outer body provided with inner profiles, and an intermediate layer of synthetic resin material which connects the outer profiles of the hub body with the inner profiles of the outer body; the hub body being with an inner contour adapted to mount the composite body on a shaft.

Abstract: An injection-molded resin face gear is provided that can suppress deterioration of gear accuracy caused by shrinkage of resin material after injection-molding, and allow accurate and smooth rotation transmission. An injection-molded resin face gear 1 includes a boss 3, a disk-shaped web 4, and a teeth section 5. The boss 3 has an axis hole 2. The web 4 is formed on an outer circumferential side of the boss 3 in an outward radial direction. The teeth section 5 is formed on an outer circumferential edge of the web 4. The teeth section 5 includes a cylindrical section 13, a disk-shaped section 14, and a plurality of teeth 15. The cylindrical section is connected to the outer circumferential edge of the web 4. The disk-shaped section 14 is formed on one end side of the cylindrical section 13 in the outward radial direction. The teeth are formed evenly spaced on an outer circumferential side of the cylindrical section 13 such that one side surface of the disk-shaped section 14 is a bottom land 16.

Abstract: An actuating device comprising an actuating element that is moved by a ball stud relative to a base comprising a ball socket. The actuating element can move relative to the base, within at least one pivot plane, between at least two shift positions. At least one recess of the ball socket has an elastic surface area which is flexible in the direction along the radius of the ball socket. The flexible elastic surface area has a centrally arranged pressure contact element, which bears against the joint ball. In a neutral position of the elastic surface area, the contact surface of the pressure contact element is at a distance away from the mid-point of the ball socket which is smaller than the radius of the joint ball, such that it possible to produce actuating devices which are robust in operation and free from play.

Abstract: A parallel-type displacement device having at least three arms each pivoting about a pivot axis, the pivot axes defining a polygon as seen from a point above the device, wherein each of the arms is actuated by an actuator and each of the arms is further connected to a head defining a small base through linking members respectively articulated on the head and the arm, each said arm and its respective head forming a hinge having two degrees of freedom such that the head always maintains its position and orientation, and in which in a neutral position, each arm is arranged so that, if drawing from the geometrical centre of the polygon a straight line that is parallel to the pivot axis of any one of the arms, the straight line intersects that arm.

Abstract: An energy absorbing steering column includes a first cylindrical member for accommodating a steering shaft of a vehicle and a second cylindrical member for accommodating the first cylindrical member and normally supporting the first cylindrical member in a predetermined position to allow the first cylindrical member to axially move relative to the second cylindrical member upon a predetermined or greater load applied to the steering shaft. The first cylindrical member includes first and second enlarged diameter portions, and the second cylindrical member includes first and second supporting portions. An elastic bush is provided between the first enlarged diameter portion and the first supporting portion for applying elastic force for supporting the steering shaft to restrict an axial movement of the first cylindrical member relative to the second cylindrical member.

Abstract: A shift module assembly for controlling the movement of a vehicle transmission out of a park condition responsive to a condition of the ignition system of the vehicle and responsive to a position of the vehicle brake pedal includes a moveable swing arm adapted to selectively control the condition of the vehicle transmission. The swing arm is in a park position when the vehicle transmission is in the park condition. The swing arm is locked in an immobile position by a solenoid operated armature shaft when the swing arm is placed in the park position. The armature shaft is in direct contact with said swing arm when said swing arm is in the locked position. The armature shaft releases the swing arm from the locked position upon actuation of the vehicle ignition system and depression of the vehicle brake pedal. The swing arm includes a stress line that will cause the swing arm to break along the stress line before, the swing arm is moved out of the park position if excessive force is applied to the swing arm.

Abstract: A human powered transmission for self propelled vehicles having oscillating power input levers displacing a pivoted power input member. The power input member pivotally journaled to a power output lever, the power output lever bearing on a fulcrum roller. The fulcrum rollers having a mechanism for adjusting the fulcrum roller along a predetermined length of the power output lever. Power output lever having a power output pivot, the power output pivot is connected to a flexible member for transferring tensile force to a unidirectional torque converter.

Abstract: In a method for reducing oxidic slags and dusts possibly loaded with organics, using an inductively heatable coke bed extending in the axial direction and having a temperature gradient, reaction gas is sucked off in an axial region of the coke bed between two induction bodies and the metal regulus as well as the slag melt are tapped on the lower end of the coke bed.

Abstract: A molded body containing titanium, a method for the production thereof, and the use thereof.

Abstract: The present invention provides a compound powder for making magnetic powder cores, a kind of magnetic powder core, and a process for making them. Said compound powder is a mixture composing of powder A and powder B, the content of powder A is 50-96 wt. % and the content of powder B is 4-50 wt. %, wherein powder A is at least one selected from iron powder, Fe—Si powder, Fe—Si—Al powder, Fe-based nanocrystalline powder, Fe-based amorphous powder, Fe—Ni powder and Fe—Ni—Mo powder; powder B bears different requirement characteristics from powder A and is at least one selected from iron powder, Fe—Si powder, Fe—Si—Al powder, Fe-based nanocrystalline powder, Fe-based amorphous powder, Fe—Ni powder and Fe—Ni—Mo powder. Said powder B adopts Fe-based amorphous soft magnetic powder with good insulation property as insulating agent and thus core loss of magnetic powder core decreases.

Abstract: The present invention relates to an apparatus and a method of manufacturing metal nanoparticles, and more particularly to an apparatus including: a precursor supplying part which supplies a precursor solution of metal nanoparticles; a first heating part which is connected with the precursor supplying part, includes a reactor channel having a diameter of 1 to 50 mm, and is heated to the temperature range where any particle is not produced; a second heating part which is connected with the first heating part, includes a reactor channel having a diameter of 1 to 50 mm, and is heated to the temperature range where particles are produced; and a cooler which is connected with the second heating part and collects and cools metal nanoparticles produced at the second heating part which allows continuous mass production of metal nanoparticles.

Abstract: Provided is a method for preparing nickel nanoparticles capable of easily controlling particle sizes and shapes of the nickel nanoparticles and obtaining a high yield of the nickel nanoparticles using a process that is simpler than methods used to mass-produce the nickel nanoparticles. The method for preparing nickel nanoparticles may be useful to prepare nickel nanoparticles by mixing a nickel precursor and organic amine to prepare a mixture and heating the mixture.

Abstract: A hearth furnace 10 for producing metallic iron material has a furnace housing 11 with a drying/preheat zone 12 capable of providing a drying/preheat atmosphere for reducible material, a conversion zone 13 capable of providing a reducing atmosphere for reducible material, a fusion zone 14 capable of providing an atmosphere to at least partially reduced metallic iron material, and optionally a cooling zone 15 capable of providing a cooling atmosphere for reduced material containing metallic iron material. A hearth 20 is movable within the furnace housing 11 in a direction through the drying/preheat zone 12, then the conversion zone 13, then the fusion zone 14, and then the cooling zone 15.

Abstract: An ore containing crystal water (bond water) is heated to dehydrate the crystal water in the form of water vapor, thereby rendering the ore porous to generate a porous ore. Next, the porous ore is forced into contact with a dry-distilled gas (organic gas) obtained by dry-distillation of an organic substance such as wood and the like or an organic liquid such as tar and the like. An organic compound such as tar and the like contained in the dry-distilled gas or organic liquid adheres to the surface of the porous ore. Next, the porous ore adhered with an organic compound is heated at 500° C. or higher, to generate an ore in which a part of an oxide of an element such as iron and the like contained is reduced by carbon in the organic compound.

Abstract: A multiple moving hearth furnace (10) having a furnace housing (11) with at least two moving hearths (20) positioned laterally within the furnace housing, the hearths moving in opposite directions and each moving hearth (20) capable of being charged with at least one layer of iron oxide and carbon bearing material at one end, and being capable of discharging reduced material at the other end. A heat insulating partition (92) is positioned between adjacent moving hearths of at least portions of the conversion zones (13), and is capable of communicating gases between the atmospheres of the conversion zones of adjacent moving hearths. A drying/preheat zone (12), a conversion zone (13), and optionally a cooling zone (15) are sequentially positioned along each moving hearth (30) in the furnace housing (11).

Abstract: A process for recovering copper from an acid aqueous solution containing cupric chlorides and alkali metal and/or alkali earth metal chlorides by a solvent extraction with a cation-exchange extractant, comprising the step of processing a solvent extraction in the presence of sulfate ions.

Abstract: The present invention provides a pneumatic tool enabling sectional adjustment of torsional force, including a main body and a cylinder mounted into the accommodation space of main body. The cylinder is fitted with air vents and also a rotor. A plurality of exhaust holes is arranged at one side of the cylinder tube of the cylinder. An exhaust duct switching member is arranged between the exhaust holes of the cylinder tube and air exhaust duct of the main body and used to switch the airflow for air exhaust by different exhaust holes. The pneumatic tool enables sectional adjustment of its torsional force, thus promoting the torsional force efficiently with better applicability.

Abstract: A rechargeable electric tool includes a housing having a lower end, to which a battery is attached, and a fastener tool configured to be attached to a lower side surface of the housing. The fastener tool includes a plate-like base portion, and an engagement portion joined to the base portion. The engagement portion protrudes rearward of the housing when the fastener tool is attached to the housing.

Abstract: A rotary wrench includes a handle having a clamping portion with two arms. Each arm includes a holding portion having a hole. At least one of the holding portions includes a positioning section. Two axles are respectively formed on two sides of a head and rotatably engaged in the holes. At least one of the sides of the head includes a positioning portion releasably engagable with the positioning section so that the head is rotatable relative to the handle about an axis and positionable relative to the axis in one of a plurality of angular positions surrounding the axis. An adjusting member is mounted to the arms and operable to adjust the spacing between the arms to move the arms between a clamping position clamping the head and a releasing position not clamping the head.

Abstract: A ratchet wrench includes a body having a first compartment rotatably receiving a drive member and a second compartment slideably receiving two pawls. A positioning member extends into the second compartment. A switch is slideably mounted to the body and includes two legs extending into the second compartment for moving the pawls. A restraining member is slideably received in the compartment and coupled to the legs to move therewith. The restraining member includes at least two positioning sections selectively engaged with the positioning member corresponding to at least two positions of the switch.

Abstract: An extension device for a socket member may include a ratchet member, a first U-joint member connecting the ratchet member and the socket member, a first sleeve member for connecting the ratchet member and the socket member to inhibit the operation of the first U-joint member. The sleeve member may include a threaded connection to the ratchet member, and the U-joint member may include a first ball and socket member. The U-joint member may include a first central shaft member, and the first central shaft member may radially rotate on a first traverse shaft member. The traverse shaft member may be connected to a first pair of arms, and the first arms may be connected to the socket member. The extension device may include a second U-joint member, and the extension device may include a second sleeve member to inhibit the operation of the second U-joint member. The second sleeve member may include a threaded connection, and the second U-joint member may include a second ball and socket member.

Abstract: There is disclosed herein an improved adjustable tool, such as a pair of pliers, having a first jaw portion and a second jaw portion, the first and second jaw portions being pivotably connected to one another by a pivot pin attached in any manner to one of the jaw portions and fitted within a channel defined within the other of the jaw portions. Preferably, the channel is formed by a plurality of pivot centers, including two non-adjacent terminal centers and at least one intermediate center, each center being connected to at least one other center by a slot to form a single pathway such that travel of the pivot pin between non-adjacent pivot centers requires travel through at least one intermediate pivot center, and the pivot pin has a positive tactile indication when properly seated in each pivot center.

Abstract: A device to facilitate dispensing of material is presented. The device includes a gripping portion that includes handles for user to hold the device and a holding portion. The holding portion includes jaws when meeting together form openings with varying diameters to hold probes of different sizes.

Abstract: A tool holding device is suitable to have an application with a power tool. The tool holding device includes a toolholder for receiving a bit. A sleeve is disposed outside the toolholder and is operable to move between a first position which allows for removal of the bit and a second position which allows the bit to be securely retained in the cavity of the toolholder. A returning member is disposed circumferentially between the toolholder and the second section of the sleeve for returning the sleeve to a neutral position between the first and second positions. Moreover, the sleeve of which does not surround the returning member abuts the toolholder.

Abstract: A bevel cutting system is attachable to a rotary device and comprises one or more bevel cutting devices having a same axis of rotation, that are combined together and that bevel objects having different diameters. The bevel cutting devices are attached to the same rotary drive spindle as a cutting blade of the rotary device. Each bevel cutting device comprises an annular wall extending away from the cutting blade. The annular wall has an inwardly-facing surface that is angled inwardly relative to their axis of rotation. An abrasive or a material removing pattern is provided on and/or in the angled inwardly-facing surface. A removable strip can be attached to the angled inwardly-facing surface. This removable strip can include an abrasive and/or a material-removing pattern or the like. The removable strip can be attached using an adhesive and/or mechanical fasteners. Cutting elements can be distributed around the inwardly-facing surface.

Abstract: A pipe cutting apparatus includes a machine base having a first machine table slidably secured for moving with a pipe during the extrusion thereof. The apparatus includes a rotary base table with a cutting arrangement attached at a periphery thereof such that the cutting arrangement orbits about the pipe during cutting thereof. The cutting arrangement includes a cutting tool supported on a pivoting support arm. The support arm includes an independent powered gear drive train for pivoting the support arm to accommodate different sizes of pipe and to allow cutting. Preferably the cutting apparatus has a second slidable table to allow precision cutting of multiple cuts of the pipe while the pipe is clamped or held.

Abstract: A machining system includes a support configured to retain an article, such as a rotor disk, having an area, such as a surface of a slot in the disk. A cutting tool, for example, a broach, is movable relative to the support to cut the area. A heating member, such as a laser, is configured to locally heat the area of the article. In one example, the cutting tool includes a body having a cutting edge. The heating member is supported by the body and is configured to provide heat adjacent to the cutting edge. The cutting edge cuts the locally heated area while the area is still heated.

Abstract: An apparatus for portioning meat, comprising a base unit, control means, first drive means mounted to said base unit, casing mounted to said base unit, further comprising: second drive means to cooperate with said first drive means for rotating said casing, and pressing member dividing said casing into at least two chambers, an in-feed chamber and a pressing chamber, said pressing member is mounted to said base unit off-center, with respect to said casing, substantially closer to the pressing chamber such that said pressing member has freedom to move in direction substantially perpendicular to the off-center direction, an ejecting device, mounted to said base unit, portioning plate receiving the meat ejected from said pressing chamber, a position adjustable bottom piece, a cutting means, positioned between the pressing chamber and the portioning plate.

Abstract: A wood cutter assembly includes a saw assembly, a slewing assembly and a skewing assembly. The saw assembly includes a cutter assembly rotated about a drive axis by a drive shaft passing through an open region therein. The cutter assembly includes a cutter mounted to a cutter spindle for rotation about the open region. The cutter assembly is mounted to a spindle housing, which is pivotally mounted to a saw positioner for movement about a pivot axis. The pivot axis passes through the drive shaft transversely to the drive shaft axis. The cutter is slewed so to move the saw positioner, and the spindle housing and cutter assembly therewith, along the drive shaft. The cutter is skewed relative to the drive shaft axis over a range of skew angles by selectively rotating the spindle housing, and the cutter assembly therewith, about the pivot axis.

Abstract: Systems and methods for cutting, or trimming, a catheter at a specified location along the length of the catheter. The catheter preferably includes a stop feature which interacts with an elongate member of the cutting system to determine the catheter is in a proper position to be cut.

Abstract: A panel saw machine (1) for cutting panels (P1) comprises: a work table (4) for supporting panels (P1); a cutting unit (3) that moves along a respective cutting line (L) on the work table (4) to divide the panels into two or more sub-panels; a pusher assembly (5) that moves towards and away from the cutting line (L) in a direction (Y) transversal to the cutting line (L) to position at least one panel (P1) on the work table (4) at the cutting unit (3); to adjust its position, the pusher assembly (5) is also mobile in a direction (X) parallel to the cutting line (L) between a first operating position and other positions along the cutting line (L).

Abstract: An adjustable accessory fence for a miter saw includes a generally rectangular, elongated arm having a front surface, an opposing rear surface, a stop extending from the rear surface, a tapered end, an opening extending between the front and rear surfaces, and a plurality of threads disposed within the opening. A threaded set screw engages the threads of the arm and adjustably projects from the rear surface of the arm. The arm is detachably coupled to a cutting fence of the miter saw. The arm pivots about the stop when the set screw is adjusted to project from the rear surface of the arm and contact the cutting fence, the front surface of the arm providing a cutting guide having an adjustable angular relationship with respect to the cutting fence, said angular relationship being established by the projecting position of the set screw.

Abstract: A rotational positioning and locking mechanism for the cutter arm component of a cutting workstation. This allows the cutter to be capable of rotation producing a variety of miter cuts. The cutter positioning and locking mechanism will allow positioning of the cutter in a variety of predetermined angles based on holes or stops in the cutter arm into which the lock is inserted. Should it be desired the cutter be placed at an angle that has not been predetermend, a friction shoe will allow the cutter arm to be rotated and positioned and any angle between the angles predetermined by the stops.

Abstract: A piercing device and method is provided which can be used to form apertures in formed members. In particular, it is believed that the present invention is particularly suited for forming apertures in hydro-formed members. The piercing device of the present invention advantageously occupies relatively little volume, allowing multiple piercing devices to be located within relatively small volumes about a hydro-forming die, or the like. The device and method can be used to perform complete pierces, wherein the slug is removed from the formed member, or to perform partial pierces, wherein the slug is maintained captive in place until removed by a subsequent manufacturing operation. The present invention also provides for a negative pierce to be achieved, during the hydro-forming process, prior to the pierce operation being performed. This negative pierce results in a reduction in the force required to perform the pierce operation and thus permits the use of a smaller hydraulic ram, or the like.

Abstract: A horizontal band-saw has a base, a conveyor assembly, multiple band-saw assemblies and multiple auxiliary pressing assemblies. The base has multiple crossbars and multiple stanchions. The conveyor assembly is mounted on the base and has two parallel conveyor belts and a guide panel. The band-saw assemblies are mounted on the base across the conveyor belts and each band-saw assembly has a casing, a drive device, two drive wheels and a band saw. Each casing is mounted on a top of the base and has an adjusting device. Each drive device is mounted on a corresponding casing. The drive wheels are mounted in a corresponding casing. The band saw is mounted around the drive wheels. The auxiliary pressing assemblies are mounted on the base adjacent respectively to the band-saw assemblies and each auxiliary pressing assembly has a front auxiliary assembly and a rear auxiliary assembly.

Abstract: For producing a cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, a geometrically predetermined groove structure of minimal depth and width is introduced into the surface by a tool embodied as a follow-on tool in that a groove cross-section is processed successively to a final size. In order for the surface to be producible in mass production with constant quality, the groove structure is worked in such that first a base groove is introduced with a groove bottom width that is smaller than the groove bottom width of the finished groove. Subsequently, at least one flank of the base groove is processed for producing an undercut groove profile by a non-cutting action or cutting action wherein the introduced groove structure is deformed in such a way that the groove openings are constricted by upsetting deformations of material.

Abstract: A module for removable insertion into a body of an instrument having longitudinal strings, the body defining a transverse cavity extending from a lateral edge. The module includes a base configured to engage the cavity as the module travels along an axis of movement into the cavity. A first ball plunger contact is configured to conductively engage a corresponding first contact plate affixed to the body when the module reaches at a first point in movement along the axis and to remain engaged as the module moves into cavity along the axis of movement. A second ball plunger is configured to conductively engage a corresponding second contact plate affixed to the body when the module reaches a second point displaced inwardly from the first point in movement along the axis and to remain engaged as the module continues to move into cavity along the axis of movement.

Abstract: A mute, appropriately conceived for a recorder, is capable of softening the sonority of the recorder which is provided with a window partially delimited by a sharp edge (S) suitable to create air vortexes when invested by blown air; the mute being provided with a flow barrier inserted through the window so as to partially deviate the blown air flowing towards the sharp edge (S).

Abstract: An apparatus is provided for lowering the fundamental frequency of a cajon drum. A first side wall of the cajon drum is the drumhead. An opening is formed in a second side wall, wherein the opening may be circular, oval, rectangular or other shape. An insert having a cross-section conforming to the shape of the opening is slid into the opening and mounted to the side wall in which the opening is formed. Various techniques for connecting the insert to the side wall of the drum are disclosed. The insert may be fitted into the drum opening during the initial manufacture of the drum.

Abstract: A tactile or haptic sensation simulation device designed to oppose the movement of a manual control component with a reaction reflecting the movement of the control, where the said device has a chamber containing a magneto-rheological fluid, a mobile element interacting mechanically with the fluid and intended to be linked mechanically to the control component, where the said element is mobile between two predetermined positions, at least one sensor with a cinematic and/or dynamic range that is representative of the movement of the control component, a control component and means for the generation of a suitable magnetic field around the chamber so as to apply a magnetic field that is dependent on the dynamic characteristics to be simulated for the movement of the manual control component, and the real-time measurements, the whole being such that the apparent viscosity of the magneto-rheological fluid varies over the travel of the manual control component.

Abstract: A method of providing a file structure for use in a music playback device is disclosed. A slotted structure is provided that has a header portion that precedes a plurality of slot portions. The header portion includes a set of parameter locations indicating one or more of the following: header length, checksum, file type, file version, and number of slots. A first slot portion includes a set of parameter locations indicating one or more of the following: slot type, name length, name, data length, and data. A second slot portion includes a set of parameter locations indicating one or more of the following: slot type, name length, name, data length, and data. The first slot data parameter location contains audio waveform data, and slots can be added and removed via firmware/operating system without affecting the other slots.

Abstract: Disclosed is an audio device that adjusts the cadence of played songs. All songs in a playlist may be adjusted to match the cadence of a particular song. First, the desired cadence of a reference song is determined by low pass filtering a digital representation of the reference song and determining the period (T) of the back beat of the reference song. The cadence of subsequent songs is then determined by low pass filtering digital representations of the subsequent songs and determining the period (T) of the back beat of the subsequent songs. An adjustment of the period (T) of the subsequent songs is then determined such that the adjustment of the period (T) of the subsequent songs results in the subsequent songs having the desired cadence (i.e., the cadence of the reference song). The period (T) of the back beat of the subsequent songs are then adjusted.

Abstract: An electroacoustic transducer system for converting sound waves propagating from a musical instrument drum to an electric signal is generally provided. The system includes a housing, an electroacoustic transducer, and a cover. The housing includes a concave inner surface and a convex outer surface. In addition, the housing defines a housing cavity with a mouth. The electroacoustic transducer is disposed in the housing cavity and faces outwardly from the concave inner surface and towards the mouth to receive sound waves propagating from the drum. The electroacoustic transducer receives and converts the sounds waves in the housing cavity to the electric signal. The cover has a generally planar outer surface and extends over the mouth to at least partially enclose the electroacoustic transducer.

Abstract: A chambered electric guitar according to an illustrative embodiment of the present invention includes at least one tone chamber that is linked to the external world only via a pick-up cavity of the guitar. Vibration of the strings of the guitar generates a vibration of the air in the tone chamber. This air vibration moves the air in and out of the tone chamber via the pick-up cavity. This air movement in the vicinity of the pick-up moves the pick-up as a whole and/or moves some portions of the pick-up. This pick-up movement changes the sound of the guitar.

Abstract: A method, system, and apparatus for providing feedback about firing on blueforce personnel are provided. A blueforce soldier is armed with a weapon that has one or more weapon sensors. The weapon sensors may provide information about a direction of fire and a firing state of the weapon. A blueforce-injury-possibility calculator may determine the direction of fire, the firing state, and an injury zone of the weapon based on the information from the weapon sensors. The blueforce-injury-possibility calculator may receive location information about one or more blueforce personnel. The blueforce-injury-possibility calculator may then determine a blueforce-injury possibility based on the injury zone and the location information. Tactile feedback may be provided to the blueforce soldier based on the blueforce-injury possibility. The tactile feedback may be provided via a tactile-feedback suit.