Accession Number : ADD008163

Title :   Line Release System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Towle,John H

Report Date : 09 Sep 1980

Pagination or Media Count : 7

Abstract : The patent is concerned with a line release system comprising a release actuator and latch which are interposed between a line and a parachute harness and which transmit the forces on the line to the harness until the line release is accomplished. The release actuator causes the latch to release the line when a first predetermined tension is placed on the line followed by a second, lesser predetermined tension. In a spring operated version of the release actuator, a plunger is retained by a shear pin. The plunger is subjected to tension from the line. When the first tension level is reached, the shear pin breaks and the plunger moves under tension, compressing a spring. When the tension subsequently decreases, the plunger is urged in the opposite direction by the spring, to operate a release latch which frees the line from the parachute harness. In a pressurized gas operated version of the release actuator, a piston containing a pressurized gas capsule is retained by a shear pin. The piston is subjected to tension from the line. When the first tension level is reached, the shear pin breaks, allowing the piston to move to pierce the capsule on an anvil or stylus. When the tension on the piston decreases to the second tension level, the gas urges the piston upward to operate a pendant release latch which frees the pendant from the parachute harness. (Author)

Descriptors :   *Patents, *Aircraft, *Escape systems, *Release mechanisms, Parachutes, Harnesses, Pins, Springs, Tension, Actuators, Gases, Pressurization

Subject Categories : Gliders and Parachutes
      Escape, Rescue and Survival

Distribution Statement : APPROVED FOR PUBLIC RELEASE