Month in the Patent Office

In parachute equipment where in a stabilizing parachute stabilizes an aviator during a free fall, a barometric device, armed by the same act as the release of the stabilizing parachute, is provided which at a predetermined altitude, frees a main parachute for withdrawal by the stabilizer. A pack 10 formed with harness 12 and waist belt 13 comprises a front flap 14 and top and side flaps 15 and 16 interconnected by cones 17 locked by pins 18. The interior of the pack is divided into two compartments 23 and 24 by flaps 19 and 20 secured together by loops 21 engaged by a lazy line 43 secured to the crown of the main parachute, the stabilizing parachute being housed in the compartment 23 and the main parachute in the compartment 24. The main lift webs 26 of the harness are provided with releasable attachments 27 for two straps 28 secured to the lines of the stabilizing parachute 44 and to the lazy line 43, the attachments 27 being controlled by rip cords 29 operated by a barometric device 25, and is housed in the compartment 24. The locking pins 18 may be released by a static line 33 secured either to an ejection seat or the aircraft or by a manually operated release 34 and the static line 33 is connected also to barometric device 25. In operation when the aviator leaves the aircraft, the static line 33 will withdraw pins 18 to free flap 15 to release the stabilizing parachute from compartment 23 and at the same time will arm device 25, which at a pre‐determined altitude will free attachments 27 to enable the parachute 44 to run free and tension line 43 to free loops 21 and withdraw the main parachute 48. A drogue parachute 46 is attached to stabilizing parachute 44.