A power tool for installing a metal locking tie is disclosed. The power tool includes a body and a power chassis. The body of the tool includes a gear carrier, a tensioning mechanism and a cutting mechanism. The gear carrier is positioned in the tool body and the tensioning mechanism is mounted in the gear carrier. The cutting mechanism engages the gear carrier. As the tie is tensioned, the gear carrier moves linearly in the tool body to cut the tensioned tie.

A crane jib system having a main jib, an auxiliary jib, and a telescoping cylinder. The main jib is comprised of main telescoping portions and the auxiliary jib is attached to the main jib and comprises auxiliary telescoping portions. The telescoping cylinder has a first telescopic part locking unit disposed on a base portion of the telescoping cylinder. The first telescopic locking unit is adapted to selectively engage the main telescoping portions. A second telescopic part locking unit is disposed on the telescoping cylinder above the first telescopic part locking unit. The second telescopic part locking unit is adapted to selectively engage the auxiliary telescoping portions.

A boom truck includes a telescopic lifting boom with a lifting unit and a support structure having a first support arranged on the chassis of the boom truck. A second support in the form of an elongated bearing and support beam body extends in the longitudinal direction of the boom truck. The beam body is pivotally mounted to the first support about a rear bearing axis, whereas the lifting boom is pivotally mounted to beam body about a front bearing axis. Actuators act on the beam body and the lifting boom as a unit and act to pivot the lifting boom about the front bearing axis.

A power generator is associated with a crane boom at or near the tip of the boom. The generator responds to movement of the lifting cable to initiate the transmission of a signal to a crane controller. The signal serves as a start-up or a wake-up signal to the crane controller which may then immediately analyze operation of, for example, an anti-two block device associated with the boom tip. The crane controller may then control the operation of the crane in accordance with signals received from the anti-two block device or immediately identify malfunctions of the anti-two block device and control the crane operations accordingly.

Disclosed is a crane comprising: a lower body; an upper slewing body; a counterweight unit including a plurality of wheels to travel on the ground in a turning direction equal to a slewing direction of the upper slewing body while being suspended from the upper slewing body; a steering actuator for rotating each of the wheels around a steering-rotation center axis to change the steering angle; and a steering control device for controlling the steering actuator. The steering control device includes: a slewing-identification-signal receiving section which receives a slewing identification signal for identification of the slewing direction of the upper slewing body; and an actuator operating section operates the steering actuator to orient each of the wheels to the inside of a tangent line to an orbit of the wheel at the steering-rotation center axis, based on the identified slewing direction identified from the slewing identification signal.

An elevator including a car is arranged in a shaft. A set of compensator cables are attached to a bottom of the car and engaged with a compensator drum. A set of hoist cables are attached to a top of the car and engaged with a hoist drum to move the car vertically in the shaft, wherein the set of compensator cables and the set of hoist cables are configured to only move the car vertically.

A traveling crane includes a longitudinal beam displaceable on rails. A traveler having a hoisting winch with a cable drum is displaceable in a transverse direction, and is operable to wind a cable reeved through at least one lower block. The hoisting winch is displaceable relative to the traveler in a hoisting winch travel direction such that a cable run out point remains in one location relative to the longitudinal extent of the cable drum. Two winching hoists are provided which are displaceable transversely to the longitudinal beam with respective cable drums thereof being disposed parallel to and spaced from each other. A common cable can be wound up and down by the two cable drums, and the two cable drums include cable grooves running in opposite directions. The two cable drums are operable in the opposite direction of rotation for lifting and lowering a load.

When an extension pattern selection device is activated, a normal mode is displayed on a screen of a monitor. An operator presses a manual mode switch key of an operation unit to switch the display mode of the screen from the normal mode to an extension pattern manual rearrangement mode. In the extension pattern manual rearrangement mode, the operator rearranges extension patterns so that frequently selected extension patterns P may be displayed at upper positions. Thus, the frequently selected extension patterns P are more preferentially displayed than the other extension patterns P.

Embodiments of chemical delivery systems disclosed herein may include an enclosure; a first compartment disposed within the enclosure and having a plurality of first conduits to carry a first set of chemical species, the first compartment further having a first draw opening and a first exhaust opening to facilitate flow of a purge gas through the first compartment; and a second compartment disposed within the enclosure and having a plurality of second conduits to carry a second set of chemical species, the second compartment further having a second draw opening and a second exhaust opening to facilitate flow of the purge gas through the second compartment, wherein the first set of chemical species is different than the second set of chemical species, and wherein a draw velocity of the purge gas through the second compartment is higher than the draw velocity of the purge gas through the first compartment.

A valve unit includes a valve member that moves relative to a valve seat in response to a magnetic field generated by a coil. An input signal to the coil controls the extent of movement of the valve member relative to the valve seat, to control a gas flow rate therethrough. The gas valve unit also includes a setting adjustment device that provides a setting adjustment input utilized for calibrating or adjusting at least one gas flow rate. A valve controller is configured to receive an activation signal and to responsively send an input signal to the coil to move the valve member and establish at least one desired gas flow rate corresponding to the activation signal, wherein the valve controller is configured to adjust the input signal to the coil based on the setting adjustment input, to thereby enable field adjustment of at least one gas flow rate.

The Invention provided is a hydraulic powered down hole reciprocating pump traveling valve component to provided lifting hydraulics on the down stroke using the derived motion and pressure of petroleum liquids and gasses, such as oil, water and natural gas and also utilizing the frictional traveling forces driven by the surface equipment. Designed to utilize the elements within the pumping apparatus to obtain the hydraulic power within and transfer the energy's force to the exposed bottom end of the pressure locked traveling ball valve adjacent within the ball valve containment cage, providing ultimate lifting power to open the ball valve on the initiation of the down stroke. The component consist of a Hollow Hydraulic Power Shaft, Hollow Pressure Motion House, and a Fluid Cavity Power Drag Plunger.

A diaphragm sealed flow cavity comprises a first body comprising a support surface, a diaphragm comprising an outer portion that is joined by a weld to the first body, a clamped portion, and an inner portion that is movable along an axis, with the clamped portion of the diaphragm being compressed between the bearing surface and the support surface. The diaphragm sealed flow cavity may include a cylindrical body having a crimped portion for joining the cylindrical body to the first body. The diaphragm sealed flow cavity may also include a member that applies a live load to the clamped portion of the diaphragm. In the exemplary embodiments, the diaphragm sealed flow cavity may be realized as part of a diaphragm flow control valve having a valve body, diaphragm and a housing.

The invention allows securing greater discharge pressure and flow rate at high revolutions of an engine in order to secure lubrication and cooling, while reducing discharge pressure and flow rate at low and medium revolutions of the engine in order to improve efficiency. The invention includes a housing; a relief valve; a valve passage; a main discharge flow channel; a main relief flow channel; an auxiliary relief flow channel; a solenoid valve mounted on the auxiliary relief flow channel; and a spring. The solenoid valve is controlled so as to switch between communication and shut-off between the auxiliary relief flow channel and the large-diameter passage section in accordance with an increase or decrease in engine revolutions, and oil in the large-diameter passage section is discharged when the shut-off is implemented.

In one featured embodiment, a spring assembly for a valve comprises a spring, a spring seat including a cup-shaped portion for seating one end of the spring, and a ball received within a recess formed within the cup-shaped portion of the spring seat. The ball is defined by a ball diameter. A disc prevents the ball from contacting a piston. The disc is defined by an outer diameter and includes a center opening defined by an inner diameter. A ratio of the inner diameter to the ball diameter is between 0.60 and 0.65.

Systems, methods and apparatus for providing an electromagnetic flow controller. In one embodiment, an electromagnetic flow controller can have two substrates, a permanent magnet, and two electrical traces. One of the substrates may deflect away from the other substrate upon applying an electrical signal to at least one of the two electrical traces.

A fuel transfer system for an aircraft includes an upper tank, a lower tank, a fuel transfer line connecting the upper tank to the lower tank, an upper fuel transfer line outlet in the lower tank, a lower fuel transfer line outlet in the lower tank, an upper float valve associated with the upper fuel transfer line outlet, and a lower float valve associated with the lower fuel transfer line outlet. The upper fuel transfer line outlet, which is in the lower tank, is in fluid communication with the upper tank. The lower fuel transfer line outlet, which is located in the lower tank, is in fluid communication with the upper tank.

An elastic longitudinal net (1) for longitudinal food products, especially cold meat products, is formed as a sleeve having at least one longitudinal main warp (21) of a tightening chain weave having at least one substantially inextensible thread (213, 214), and at least one weft (3) having at least one elastic fiber and circumferential sections (31), the ends of which are interweaved substantially perpendicularly between the substantially inextensible fiber and longitudinal sections (32) existing between neighboring circumferential sections (31) and running in a concurrent manner relative to and weaved with at least one main warp (21). The longitudinal sections are interweaved through at least one main warp (21) substantially perpendicularly relative to its longitudinal axis, passing through loops (215, 216) of the at least one substantially inextensible thread (213, 214) of the main warp, forming a serpentine run having at least two external loops (321).

A self-expanding, pseudo-braided device embodying a high expansion ratio and flexibility as well as comformability and improved radial force. The pseudo-braided device is particularly suited for advancement through and deployment within highly tortuous and very distal vasculature. Various forms of the pseudo-braided device are adapted for the repair of aneurysms and stenoses as well as for use in thrombectomies and embolic protection therapy.

A braider for braiding wires to a tube comprising an iris assembly having stacked iris plates. Each of the iris plates includes a center aperture, a wire orifice disposed radially outward from the center aperture, and an arcuate channel. The iris plates are rotatable relative to each other to adjust a circumferential orientation of the wire orifices relative to each other. The arcuate channel(s) of each respective iris plate is coincident with the wire orifice(s) of the remaining iris(es). The braider comprises a feeder assembly configured for advancing the tube through the center apertures, and advancing the wires through the respective wire orifices. The braider further comprises a braiding assembly configured for braiding a plurality of filaments around the tube and the plurality of wires as they are fed through the iris assembly, thereby creating a braided tube assembly.

An electrical device such as a headset may have a cable. Wires in the cable may be used to connect speakers in the headset to a connector such as an audio jack. The cable may have a tubular intertwined cable cover that covers the wires. Computer-controlled servo motors in fiber intertwining equipment may be adjusted in real time so that intertwined attributes such as intertwining density and intertwining tension are varied as a function of length along the intertwined cable cover. The fiber intertwining equipment may make these variations to locally increase the strength of the intertwined cable cover and the cable in the vicinity of a bifurcation in the cable and in the vicinity of the portion of the cable that terminates at the audio jack.

Methods of forming a structure for treating a vessel include providing a mandrel and braiding a plurality of filaments around the mandrel. The mandrel may include a strand having a longitudinal axis and a plurality of balls coupled to the strand along the longitudinal axis. Pairs of the plurality of balls may be spaced along the longitudinal axis. Braiding the plurality of filaments around the mandrel may include, during braiding, forming a plurality of bulbs around the plurality of balls and forming necks between pairs of the plurality of balls. The methods may include, after braiding the plurality of filaments, heat treating (e.g., shape setting) the plurality of filaments on the mandrel. Portions of the braided plurality of filaments may be secured to the mandrel, for example using bangles, wire, and/or adhesive.

A mandrel for manufacturing a vascular device for treating a vessel includes an elongate strand and a plurality of bulbs coupled to the elongate strand. The elongate strand may extend through each of the plurality of bulbs. The mandrel may include first and second elongate strands each including a plurality of bulbs. The first and second elongate strands may be separable at an intermediate portion coupling the first and second elongate strands. A vascular device manufactured utilizing the mandrel may be configured to treat a vessel.

Considerable damage to rails, wheels, and trucks can result from geometric anomalies in the wheelsets, rails, and truck hardware. A solution for identifying and quantifying geometric anomalies known to influence the service life of the rolling stock or the ride comfort for the case of passenger service is described. The solution comprises an optical system, which can be configured to accurately perform measurements at mainline speeds (e.g., greater than 100 mph). The optical system includes laser line projectors and imaging cameras and can utilize structured light triangulation.

An electrical device not only controls train signals as trains advance, but also alters the voltage in the tracks leading up to the signals so that the trains will actually stop at a red signal, slow at an amber aspect and continue on at full speed when the signal is showing green. The electrical device of the present invention can change the “block signal” from “green” to “red”, thereby signaling the engineer behind the train to come to a stop. In addition, the electrical device can simultaneously change the voltage in the tracks to stop the approaching train at the red signal. Only when the forward train has cleared will the approaching train get a clear signal and voltage to resume its forward progress.

An Engineer's View (EV) wireless video system for powered and unpowered model railroad engines is disclosed. The invention uses commercially available wireless spy cameras, powered by a custom power supply circuit which is compatible with either DC or DCC track systems. The present invention is compatible with all commercial model railroad gauge diesel engines including HO and N Gauge or may be factory installed. The EV system demonstrates a remarkably stable and realistic image of a model railroad layout. Moreover, the present invention may also provide a stable source of power to the engine where stalling could occur at points of track defects.

A railcar has an on-board system for detecting conditions of the railcar. The on-board system includes a plurality of condition sensors positioned on the railcar. A transceiver is in communication with each of the plurality of condition sensors so as to receive condition data from the plurality of condition sensors. The transceiver transmits the condition data to a receiving station remote from the railcar for review and analysis.

A mechanism for coupling a switch point to a point detector box having a point detector bar includes a first portion structured to be slidably coupled to the point detector bar and a second portion structured to be slidably coupled to the switch point.

A mold for forming a temporary prosthesis has at least two mold members at least partially separable from each other. The at least two mold members cooperatively define a generally enclosed interior cavity for forming the temporary prosthesis. The mold has a securement structure mounted on the at least two mold members for securing the at least two mold members to each other during the forming of the temporary prosthesis. The securement structure is removable from the at least two mold members by hand and without the use of a tool.

The invention relates to a protective coating, having the chemical composition CaSibBdNeOgHlMem, wherein Me is at least one metal of the group consisting of {Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W, Y, Sc, La, Ce, Nd, Pm, Sm, Pr, Mg, Ni, Co, Fe, Mn}, with a+b+d+e+g+l+m=1. According to the invention, the following conditions are satisfied: 0.45≦a≦0.98, 0.01≦b≦0.40, 0.01≦d≦0.30, 0≦e≦0.35, 0≦g≦0.20, 0≦l≦0.35, 0≦m≦0.20. The invention relates also to a coated member having a protective coating, as well as to a method for producing a protective coating, in particular a multilayer film for a member.

A slab formwork system (100), consisting of a plurality of vertical supports supporting a plurality of panels is provided characterized in that the slab formwork system (100) includes a plurality of vertical main members (101,102,103) whose height is adjustable by an operator such that each top of the vertical main member (101,102,103) is at the same level when referenced from an imaginary lower horizontal line, at least one primary bearer (301), wherein the primary bearer (301) is supported by the plurality of vertical main members (101,102,103) wherein each vertical main member (101,102,103) is perpendicular to each primary bearer (301), a pair of adjustable struts (246) in each vertical main member (101,102,103), wherein each adjustable strut (246) is diagonally connectable to the vertical main member (101,102,103) and the primary bearer (301), a plurality of height adjustable props (502) connectable perpendicularly to at least one filler panel (410), a plurality of secondary bearers (303) wherein the secondary bearers (303) are disposed perpendicular on top of the primary bearers (301), a longitudinally extendable element (315) connectable to terminal end of the primary bearer (301) supported by a plurality of vertical main members (103) and a plurality of panels (407) assembled on top of the secondary bearers (303) to receive concrete wherein each filler panel (410) is disposed between at least two panels (407).

The present invention relates to a building panel. The building panel includes a core including first geopolymer concrete. One or more protective layers are located adjacent the core. Each protective layer includes second geopolymer concrete of greater density than the first geopolymer concrete. In one embodiment, passages are defined along which air can move within the core.

A system for constructing a form for forming a concrete structure is disclosed herein. The system may include a number of extensible form panels. An extensible form panel may be constituted with a basis frame having a basis frame section and an extensible frame section extensible for a variable amount in at least one direction, along one axis. The frame sections may be configured to respectively accept and support basis and filler facings. The extensible frame section may include male/female endings. The system may also include a capping member with male and/or female endings. A form panel may include hinges, which may be swivelable, drive screws, and/or electronic motors. The system may further include a stub free to facilitate vertical coupling of form panels. In various embodiments, the parts may be formed with reusable material or materials.

In a process for producing half-shells (2) which are made from a dough for bakery products and are characterized by an annular orifice rim (6) with a finished surface, by producing a wafer sheet (1) comprising a plurality of half-shells (2) connected to one another by an interconnecting wall (4), by forming and baking said dough in a mold with the use of a mold formed by two complementary plates (12, 14) having respective front surfaces which, as a result of the fitting together of the two plates, can define a forming cavity having a shape generally corresponding to that of said wafer sheet (1), a mold is used wherein the front forming surface of at least one of said plates has shaped portions (26) which project towards the front surface of the other plate (12) and which can define, in the dough that is subjected to baking in the forming cavity, a notch (24) in the interconnecting wall (4) adjacent each half-shell (2), wherein the plates can be fitted together in an initial position in which the forming cavity has a volume smaller than the volume of the wafer sheet to be obtained, the dough is subjected to a first, partial baking step in the forming cavity with the molds fitted together in the initial position, while the volume of the forming cavity is kept constant until the dough is partially solidified, the dough is then subjected to finishing baking with an increase in the volume of the forming cavity, in order to obtain a wafer sheet (1) wherein the half-shells (2) are connected to the interconnecting wall (4) by an annular region (28) having a thickness which is substantially less than the thickness of the interconnecting wall (4); the half-shells can thus be separated from the wafer sheet by a slight pressure exerted in a direction perpendicular to the plane of the wafer sheet.

A modular mold system for manufacturing a shell part of an oblong composite structure having a longitudinal direction from a fiber reinforced matrix material. The modular mould system includes a number of mold sections, which are adapted to being assembled to an assembled mold part. The number of mold sections includes a first mold section having a first molding surface with a contour that defines a surface of a first longitudinal part of the shell part and a first end section; and a second mold section having a second molding surface with a contour that defines a surface of a second longitudinal part of the shell part and a second end section; which, when the modular mold system is assembled to the assembled mold, the second end section of the second mold section abuts the first end section of the first mold section.

A mold system for forming a multilevel block is disclosed which comprises a multilevel mold box insert for forming a multilevel block, a mold box frame adapted for receiving therein the multilevel mold box insert, a multilevel plunger assembly, and a press head plate adapted for receiving thereon the multilevel plunger assembly.

Provided are a polycrystalline silicon ingot casting mold and a method for producing a polycrystalline silicon ingot casting mold, with which high-quality silicon ingots can be obtained at high yields by minimizing sticking with the surfaces of the silicon ingot casting mold, and losses and damages that occur when solidified silicon ingot is released from the mold. The method for producing a polycrystalline silicon ingot casting mold having a release layer, including: forming a slurry by mixing a silicon nitride powder with water, coating the surface of the mold with the slurry, and heating the mold at 400 to 800° C. in an atmosphere containing oxygen, after coating the slurry.

An optical lens mold includes a mold body, a magnetic fluid, a plurality of thermocouples, a plurality of electromagnets, a controlling unit and a power source. The mold body defines a plurality of injection chambers and a cooling channel surrounding the plurality of injection chambers. The magnetic fluid contains magnetic particles and flows in the cooling channel. The thermocouples are capable of sensing temperatures of the plurality of injection chambers correspondingly. The electromagnets are positioned above the cooling channel corresponding to the plurality of thermocouples. The plurality of thermocouples and the plurality of electromagnets are connected to the controlling unit via the power source, the controlling unit is capable of the comparing the standard temperature value with temperature values sensed by the plurality of thermocouples, and maintaining the temperature of the plurality of injection chambers in a normal state.

A polycrystalline silicon ingot casting mold, and method for producing same. Mold release material being obtained by blending a silicon nitride powder (A) having an average particle diameter along the short axis of 0.6 to 13 μm with a silicon nitride powder (B) having an average particle diameter along the short axis of 0.1 to 0.3 μm at a weight ratio of 5:5 to 9:1; coating the mold surface with the slurry; and a heating the mold at 800 to 1200° C. in an atmosphere containing oxygen.

A method for producing a wood wool construction element. This method comprises the steps of dispersing at least a part of a mixture of wood wool and a hydraulic binder in a mold so as to obtain a layer of the mixture with a height that is less than the height of side walls of said mold. Said mixture is at least partially hardened after which a subsequent layer of mixture is provided. The thickness of a construction element may well exceed 30 cm, for example 40 cm, 50 cm or even 60 cm. Also, an element obtained with such method is described, as well as a production facility.

A firearm is provided that includes a receiver, a stock, an elongated barrel and a muzzle. The barrel extends from the receiver to the muzzle and has a rectangular internal bore extending from the receiver to the muzzle. The internal bore has two short sides and two long sides. A plurality of teeth extends along one of the short sides within the internal bore. A disk-shaped bullet fitting within the internal bore may be fired from the firearm. A bullet case having a rectangular orifice is provided to chamber the disk-shaped bullet for propulsion through the rectangular internal bore of the firearm.

A firearm is provided that includes a receiver, a stock, an elongated barrel and a muzzle. The barrel extends from the receiver to the muzzle and has a rectangular internal bore extending from the receiver to the muzzle. The internal bore has two short sides and two long sides. A plurality of teeth extends along one of the short sides within the internal bore. A disk-shaped bullet fitting within the internal bore may be fired from the firearm. A bullet case having a rectangular orifice is provided to chamber the disk-shaped bullet for propulsion through the rectangular internal bore of the firearm.

A toy projectile launcher assembly has the form of a crossbow. The crossbow only launches the safety projectiles that are provided. The launcher body has a handle at a first end and diverging support arms at an opposite second end. An adjustment mechanism is contained within the launcher body for selectively adjusting the length of the launcher body. The crossbow has diverging support arms. Bow arms are attached to the support arms. The bow arms pivot from retracted positions to extended positions when a projectile is loaded into the toy crossbow. The toy crossbow has elastic loops that can only engage specialized safety projectiles with side. Furthermore, the trigger mechanism can only engage the safety projectiles provided with the toy. Projectiles without a specific tab and keyhole cannot be loaded into the toy crossbow.

A grip guard may be used with a crossbow that has a main beam including a stock and a barrel. The grip guard may have a first wall that is positioned between the stock and the barrel and a second wall that extends outwardly from the main beam. The first wall may have dampening properties to attenuate sounds and vibrations caused by firing the crossbow and the second wall may prevent a user's fingers from inadvertently extending from the handle toward the barrel.

An archery bowstring release has a single jaw for retaining a bowstring within a bowstring hook, in contrast to dual-jaw pincer-type releases. The bowstring hook is situated on a release head which bears a trigger for actuating the jaw and releasing the bowstring, and a release body extends between the release head and a release mount (which can connect the bowstring release to a wrist strap, glove, or other anchor affixed to the user's body). The release head and body are pivotally joined, and when the release is ready to fire, the central axis of the release body, and at least the rear of the release head, have central longitudinal axes which are aligned with the notch in the bowstring hook, and are thus aligned with the bowstring, and are parallel to or in line with the arrow. The release therefore has a comfortable, natural, and intuitive feel during operation.

A crossbow 100 includes a rifle-style stock 22, barrel 23, bowstring 1, and a string release housing 21 with a novel string release assembly. The string release assembly in string release housing 21 includes a string latch 12 for retaining fully-drawn and cocked bowstring 1 against a string horn 19, a trigger 6 for releasing or shooting the arrow 2, a safety button 25 for the movement of the safety plate 7 from the safe position to the fire position, and a load lever 4 for loading the arrow 2. There is a safety button 25 on each side of the release housing 21 so that the safety of crossbow 100 may be operated by a right-handed or left-handed shooter. Bowstring 1 rests against the inclined surface 29 of the string horn 19 and is retained in the fully-drawn and cocked position between the string latch tangs 30 and 31 and the inclined surface 29 of the string horn 19. The load of the fully-drawn bowstring 1 is distributed between and born by the inclined the string latch tangs 30 and 31 and the inclined surface 29 of string horn 19.

The present invention relates to a device for delivering targets (2) comprising at least one column (4) for storing targets (2) capable of receiving a first target (11) at the lowest point of the column (4) and at least a second target (12) stacked on the first target (11), means for delivering the first target (11), and retention means for retaining the second target (12) in the column (4), characterized in that the retention means for retaining comprise a ramp (21) configured to exert a bearing force on the lower face of the second target (12) during the delivery of the first target (11). This invention also relates to a machine for launching targets (2) equipped with a device and a method for distributing the targets (2).

A sight and range finder for a projectile launching device are disclosed. The range finder calculates a range between a target and a projectile launching device, and transmits a signal indicative of the range. The sight visually aligns the target with the projectile launching device. A drive assembly moves an alignment member of the sight, and at least one processor receives the signal and actuates the drive assembly to move the alignment portion a selected distance based on the range.

A line launching device is provided with a tube for receiving a projectile and including an externally threaded bottom and a cap put on the tube; a cylinder including a first externally threaded extension at one end, an internally threaded cup secured to the first externally threaded extension, a second externally threaded extension at an other end, and an internally threaded ring securing to both the second externally threaded extension and the externally threaded bottom; a hollow anchor fastened in one end of the tube; a hollow fin assembly in a bottom of the projectile and including slits on a housing, pivotal fins, and an internal biasing member biasing against the fins; and a rope having one end attached to the nose and an other end fastened in the anchor. The fins project out of the slits after the projectile being propelled out of the tube by pressurized gas.

An electric toy gun with a plurality of firing modes includes a trigger, a power break holder, a power contact holder, a block member slidably coupled to the power break holder and having a first tooth and a second tooth at one lateral side thereof, a swing bar having an actuation portion and a push block connected to the actuation portion. A control mechanism enables the push block of the swing bar to be shifted to the rear side of the first tooth, the rear or front side of the second tooth. Lowering of the power break holder with the block member drives the push block to move the first or second tooth forward and then to push the first tooth forward. The block member is displaced relative to the stop portion of the link which moves the power break holder.

A bowstring release having a removable safety pin that when engaged, allows for training. The safety pin physically preventing the release mechanism from fully releasing, while allowing enough movement to provide a tactile response that the release has been activated.