PARACHUTE OPENING DEVICE Russian patent published in 1994 - IPC

FIELD: parachute equipment. SUBSTANCE: device has aneroid mechanism 1, clockwork 2, blocking levers 3 positioned in body 4 of device, lock 5, auxiliary mechanism 6 fastened at the bottom side of body 4 and provided with cable 7 located in protective casing 8. Auxiliary mechanism 6 is connected to lock 9 of parachute made in the form of double-cone. Starting mechanism 10 mounted on side surface of body 4 has calibrated lock 11 in the form of non-split collet 12, additional protective casing 13, flexible tie-rod 14, which is secured to pin 15 with its one end and to stop 16 with its other end. Compaction spinneret 17 and non- detachable part 18 of non-split collet 12 are mounted on free end of additional protective casing 13. Detachable part of collet 19 is kinematically connected with flexible tie-rod 14 and halyard 20. As halyard 20 is loaded, clearance between stop 16 and detachable part of collet 19 is taken up. When force applied to halyard 20 acquires critical value of P_кр, non-split collet 12 is opened. Detachable part of collet 19 draws flexible pin 15 through tie-rod 14 from additional protective casing 13, which is fastened through non-detachable part of collet 18 on parachutist shoulder, so that flexible pin 15 is out of engagement with balance wheel flat and stop of clockwork 2; as a result clockwork 2 is driven into operation. Motion is transmitted from clockwork 2 through gear system to blocking levers 3, which open lock of auxiliary mechanism 6 or stop clockwork 2, in case flight altitude exceeds that set by instrument scale. When predetermined flight altitude is attained due to compression of aneroid mechanism 1, levers 3 are released and clockwork 2 operates for remaining 0.8-1.2 sec and switches on lock 5, which releases piston. The piston is movable by compressed springs to pull cable 7 in protective casing 8 and open lock 9 of parachute. EFFECT: increased efficiency and enhanced reliability in operation. 2 cl, 3 dwg