Stock material or miscellaneous articles – Structurally defined web or sheet – Nonplanar uniform thickness material
Patent
1974-08-22
1976-08-10
McCamish, Marion E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Nonplanar uniform thickness material
89 36R, 428182, 428225, 428255, 428911, B32B 328, B32B 1702
Patent
active
039743136
ABSTRACT:
A projectile energy absorbing protective barrier comprising a blanket formed of multiple layers of woven cloth and a rigid supporting layer is disclosed. Each cloth layer comprises a plurality of tapes, each tape formed of high tensile strength, continuous filaments having a low modulus of elasticity. The cloth layers are each woven in a manner such that relative sliding movement between the tapes is permitted. The rigid backing layer supports the multiple cloth layers in a corrugated configuration such that the longitudinal axes defined by the corrugation nodes lie at an angle relative to the direction of the weave pattern. The corrugations, and the weave pattern, allow the cloth layers to instantly move without resistance upon impact by a projectile, in the direction of projectile travel. Subsequent to impact and achieving the speed of the projectile, the filaments wrap partially around the projectile and contain it by reacting in tension. The invention can be in the form of a "window" and surround a portion of the projectile emitting mechanism. Further, the side of the barrier remote from the direction of projectile impact can be encased by an explosively rupturable wall adapted to form a part of the outer surface of a housing, such as a jet engine nacelle.
REFERENCES:
patent: 2562951 (1951-08-01), Rose et al.
patent: 2816578 (1957-12-01), Frieder et al.
patent: 3486966 (1969-12-01), Allen et al.
patent: 3519529 (1970-07-01), Cook
patent: 3577306 (1971-05-01), Baker et al.
patent: 3832265 (1974-08-01), Denommee
McCamish Marion E.
The Boeing Company
Thibodeau P. J.
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