ATTACHMENT JOINT OF LAUNCHING DEVICE BOW-STRING (MODIFICATIONS) Russian patent published in 2008 - IPC F41B5/00 F41B5/12 

FIELD: launching devices, in particular, attachment joint of launching device bow-string, for example, such as a bow and an arbalest.

SUBSTANCE: the bow-string attachment joint has two units installed for rotation and having the first and second peripheral surfaces, bowstring for projectile launching, the first tension bow-string, the second tension bow-string, the first bow-string fastening member, the second bow-string fastening member. The first tension bow-string is fastened by one end on the first member, and by the other end on the second member. The second tension bow-string is fastened by one end on the second member, and by the other end on the first unit. The bow-string attachment joint may have two units with three peripheral surfaces, bow-string for projectile launching fastened by one end on the first unit, and by the other end on the second unit, so that the bow-string partially envelops, the first peripheral surfaces, the first tension bow-string, which partially envelopes the second peripheral surfaces of the units, the second tension bow-string, which partially envelops the third peripheral surfaces of the units. The bow-string attachment joint may have two units with three peripheral surfaces, bow-string for projectile launching fastened by one end on the first unit, and by the other end on the second unit, so that the bow-string partially envelope the first peripheral surfaces, the first tension bow-string, which partially surface of the first unit, and the third peripheral surface of the second unit, the second tension bow-string, which partially envelopes the third peripheral surface of the first unit and the second peripheral surface of the second unit and gets intersected with the first tension bow-string. An all modifications at cocking of the launching device the bow-string for projectile launching gets intersected with the first and second tension bow-strings.

EFFECT: enhanced initial velocity departure.

21 cl, 7 dwg