Embedded explosive severance of non-metallic materials
AssigneeMcDonnell Douglas Corporation
InventorsMorry L. Schimmel, Don L. Young, Jr.
Life of this patent
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Abstract
This invention relates to apparatus for explosively severing non-metallic material such as aircraft canopy transparencies, egress panels and other structural members. To provide a more effective use of a given amount of explosive, a detonating cord is encapsulated within the material to be severed. This encapsulation protects the cord and maximizes the severance effect of the detonation. The cord may be encapsulated at positions wherein augmented shock waves are used to accomplish fracture along a line away from the detonating cord while leaving the explosion products restricted in the remaining cord cavity.
Claims10
An explosively severable non-metallic transparent structure comprising:
- a frame member;
- a transparent member attached to said frame member;
- a detonating cord encapsulated within said transparent member;
- an initiator to activate the detonating cord;
- said detonating cord being of sufficient size to explosively fragment said transparent member along the detonating cord line and separate a major portion of said transparent member from the frame member.
A severable non-metallic structure comprising:
- a frame member;
- a non-metallic member attached to said frame member;
- a detonating cord encapsulated within said non-metallic member;
- an initiator to explode said detonating cord;
- and
- said detonating cord being sized and positioned to utilize augmented shock waves to produce a severance crack in said non-metallic member adjacent said detonating cord wherein the explosion is confined to the cord cavity.
An explosive severable structure comprising:
- a frame member,
- a non-metallic member attached to said frame member,
- at least one detonating cord encapsulated within said non-metallic member,
- an initiator to explode said detonating cord;
- and
- said detonating cord being sized and positioned to fragment said non-metallic member thereby severing said non-metallic member permitting detachment of said non-metallic from said frame member.
Dependencies are inferred from the claim text.