Abstract: An arrow feeding device for a crossbow includes a magazine mounted to the flight groove of the crossbow. A storage space is formed through the magazine so as to accommodate multiple arrows therein. A retainer is located in the storage space, and resiliently normally presses the arrows in the storage space so that the users shoots the arrows one by one. The retainer is a resilient and an elongate part, an elongate plate cooperated with a spring, or a block cooperated with multiple springs. The retainer can be pulled or pivoted upward to allow the arrows to be fed into the storage space.

Abstract: An arrow feeding device for a crossbow includes a magazine mounted to the crossbow and includes a storage space which opens through the magazine from the top to the open bottom of the magazine. Multiple arrows are loaded in the storage space. A retainer is pivotably connected to the magazine and normally presses the arrows in the storage space so that the lowest arrow of the arrows in the storage space is fed into the barrel of the crossbow in sequence. The users shoot the arrow without repeatedly lowering the crossbow and loading the arrows.

Abstract: A crossbow includes a barrel with a flight groove, and a bow. A magazine is mounted to the body and located above the flight groove. A passage is defined through the magazine for accommodating multiple arrows therein. A slot is formed between the magazine and the flight groove. A string of the bow movably extends through the slot. An arm is pivotably located in the passage and includes a hook end which normally presses on a top-most arrow of the arrows in the magazine. When no arrow is in the magazine, the hook end is inserted into the slot and the user cannot successfully cock the string because the string is stopped by the hook end, so that the user is acknowledged that there is no arrow in the magazine.

Abstract: A safety device for a crossbow includes a control box connected to the shooting device of the crossbow. The control box includes a case, an operation assembly and a pivotal member. The operation assembly is located in the case and the operated is operated to be a string-cocked mode. An activation member is pivotably connected to the case and located beneath the operation assembly. The activation member includes a stop which is located in the box. When the operation assembly is operated to the string-cocked mode, the string cocked and no arrow is loaded. The operation assembly does not restrict the activation member. The stop is restricted by the pivotal member so that the activation member cannot be pivoted, and the trigger cannot be pulled.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. A link is connected between the two support devices. A base is connected to the link. Two support legs angularly extend from the base. The crossbow can be operated in a prone position. The crossbow can be positioned between a first position where the two high ends contact the ground, and a second position where both of the high end and the low end of each of the two inclined faces contact the ground. The crossbow does not fall in first and second positions.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes a first block and a second block. The first block is fixed to the body. The second block is pivotably connected to the first block. Two plates are connected to the second block. Each plate includes a curved slot. Two bolts movably extend through the two curved slots and the first block so that the second blocks are pivotable relative to the first blocks. Each second block includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. The crossbow is positioned between a first position and a second position with a weight balance.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. The crossbow can be positioned between a first position where the two respective high ends contact the ground and an angle is formed between the inclined face of each support device and the ground, and a second position where both of the high end and the low end of each of the two inclined faces contact the ground. When the body changes from the first position to the second position, the grip portion and the aim device rack reach a weight balance.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. A link is connected between the two support devices. A base is connected to the link. Two support legs angularly extend from the base. The crossbow can be operated in a prone position. The crossbow can be positioned between a first position where the two high ends contact the ground, and a second position where both of the high end and the low end of each of the two inclined faces contact the ground. The crossbow does not fall in first and second positions.

Abstract: A method of forming a semiconductor device includes the following operations. A substrate is provided with a device and an insulating layer disposed over the device. A silicon-containing heterocyclic compound precursor and a first oxygen-containing compound precursor are introduced to the substrate, so as to form a zeroth dielectric layer on the insulating layer. A zeroth metal layer is formed in the zeroth dielectric layer. A silicon-containing linear compound precursor and a second oxygen-containing compound precursor are introduced to the substrate to form a first dielectric layer on the zeroth dielectric layer. A first metal layer is formed in the first dielectric layer.

Abstract: A cocking device for a crossbow includes a cocking unit which is pivotably connected to the body of the crossbow, and has a cocking unit which is detachably engaged with a holding unit connected to the grip of the crossbow by the locking unit. The cocking unit includes an opening located next to the locking unit. A scrolling unit is accommodated in the cocking unit and includes a scrolling member, an axle, a ratchet disk and a stop. The scrolling member driving the axle which drives the ratchet disk. The stop is located corresponding to the opening. The stop has the first end thereof normally engaged with one of ratchets of the ratchet disk. The second end of the stop extends through the opening. The stop is pivotable to engage with the ratchet disk or to release the ratchet disk to control the operation of the scrolling member.

Abstract: A crossbow includes a barrel, a cocking device, a bow device, a link device and a cartridge. The retention member is moved by the operation of the string of the bow device. The cocking device detachably holds the string. By repeatedly operating the link device and pulling the trigger, the cocking device is moved back and forth repeatedly, and the retention member moves back and forth to control the restriction member to pivot so that the bullets continuously drop to the groove and located in front of the retention member. Therefore, the crossbow can shoot the bullets continuously. The bullets are allowed to be fed into the cartridge one time of feeding.

Abstract: A limb and string pack for a crossbow includes a base which is installed to an installation recess in the front end of the barrel of the crossbow. The base includes a passage. Two links respectively extend from the base and beyond the two end openings and toward the front end of the barrel. Two limbs are connected to the two links. Two cams are respectively and pivotably connected to the two limbs. A string is connected between the two cams. Two cables respectively extend through the passage of the base and are connected to the limbs and the cams. A bolt secure the base to the links and the barrel. Another bolt secures the links to the front end of the barrel of the crossbow. The base, the links and the limbs are easily removed by unscrewing the two bolts to maintain the strings and the cables.

Abstract: A simulation laser training cartridge for dry-firing practice adapts to the wear condition of a given firearm and provides a convenient way of measuring the barrel erosion. The cartridge uses multiple adjustable interfacing parts that can be applied selectively and independently according to the condition of the barrel to ensure a snug fit in 3-dimensions. In a 2-unit kit embodiment of the invention, the muzzle unit can work with multiple chamber units for a multi-chamber firearm. The cartridge also includes internal modules for laser property management, status monitoring, movement tracking, memory, and communication to help a user manage the device and allow for advanced training applications. By changing the laser property, the laser training cartridge can work as a bore sight. The cartridge may further include a means to attach an external part, so the external part comprises a means to distinguish a longitudinal position inside said barrel.

Abstract: A limb assembly for a sport bow includes two limb pockets connected to two rises of the bow and each limb pockets includes two slots with a separation plate connected between the two slots. Each slot includes an open space. Two limb units each have the first end thereof inserted into the slots from the open space of each of the two limb pockets. A string IS connected between two respective second ends of the two limb units. Two resilient members are respectively located between the body and each of the two limb units. Each resilient member has a buffering portion protruding therefrom which is received in a recess of the rise corresponding thereto so that each limb unit resiliently compresses the rise by the resilient members. The resilient members are replaceable to adjust the compress force between the limb units and the rises.

Abstract: An arrow supply assembly for a bow includes an operation box connected to riser of a bow, and a cartridge is connected to the operation box. The operation box includes a first passage defined axially through two sides thereof, and a string of the bow movably extends through the first passage. The cartridge includes a second passage communicating with the first passage. The second passage includes an insertion path and an entrance. The insertion path accepts multiple arrows to be stored in the cartridge. A press member is pivotably connected to the cartridge and biased by a resilient member so as to press and supply the arrows in the cartridge into the first passage. The users pull the string continuously to shoot the arrows that are fed into the first passage of the operation box.

Abstract: A crossbow includes a barrel with a bow connected to the top thereof, a handle cooperated with a trigger, a retention unit and a cocking device. The cocking device includes two slots respectively defined in two sides of the barrel and each slot includes a holding member slidably located therein. A link unit is connected between the two holding members and barrel. The holding members are moved toward the front end of the barrel to hook the string, and the holding members are moved toward the rear end of the barrel to hook the string to the stop member of the retention unit by operation of the link unit. When pulling the trigger, the stop plate moves downward to release the string to shoot the arrow.

Abstract: A crossbow includes a barrel, a retention unit, a link unit and a positioning unit. When the second link pivots toward the restriction member, the rod is moved with the slot of the restriction member, and the restriction member is pivoted relative to the second link. The pivotal action of the first link drives the retention unit to move in the arrow track and toward the bow. On the contrary, when the retention unit is connected to the bow, the second link is moved to its initial position, and the rod is engaged with the serrated portion to form a stand-by status. When the second link continuously pivots to disengage the rod from the serrated portion, the second link is engaged with the handle to form a completion status. During the cocking action, the users may have multiple stages of action to cock the crossbow.

Abstract: A safety device connected to a shooting device or a crossbow includes a safety member that is moved to restrict an activating member from pivoting to prevent unintentionally shooting when replacing arrows at the ready-to-shoot status of the crossbow. A resilient member is used to pull the transmission plate to move toward the second end of a case of the crossbow to deactivate the restriction to the positioning member such that the positioning member pivots and protrudes beyond a notch of the case to stop the shooting action of the string. After a new arrow is positioned, the safety member is moved again to drive the transmission plate from the second end to the first end of the case, and the activating member is released from restriction and the arrow is ready to shoot.

Abstract: An arrow retention device of a crossbow includes a fixing member which has one end thereof fixed to the shooting device, and an installation slot is defined axially in the underside of the fixing member. An arm is pivotably inserted into the installation slot and has a first end and a second end. The first end is exposed beyond the installation slot, and the second end of the arm is inserted into the shooting device. A restriction rod extends from each of two sides of the arm. A pushing spring connected to the top of the arm is biased between the second end of the arm and the shooting device. A retention member is connected to the arm and includes a contact portion for pressing an arrow. When shooting the arrow, the pushing spring pivots the arm back, and the contact portion is separated from the arrow.