US3665858A - Detonating fuze - Google Patents

Abstract

A high-low temperature shock-wave propagating fuze having a braided fiberglass lining overlying a radially exploding mild detonating cord. An abrasive resistant, flexible non-metallic covering surrounds the lining and contains radial explosion and debris thereof without rupture between temperatures of -100* F. and +400* F.

Description

United States Patent Travor 1 May 30, 1972 s41 DETONATING FUZE [56] References Cited [72] Inventor: Bruce Travor, Holland, Pa. UNITED STATES PATENTS 1 Assisnw The United of America 88 3,129,663 4/1964 Schnepfe, Jr. ..1o2/27 "P by of Army 3,296,968 1/1967 Shulman et a1. 102/27 221 Filed: Sept. 22, 1970 Primary Examiner-Verlin R. Pendegrass 1 PP NW 74,486 Attorney-Harry M. Saragovitz, Edward J. Kelly, Herbert Berl Related US. Application Data and [63] Continuation-impart of Ser. No. 770,962, Oct. 28, [57] ABSTRACT 1968, abandoned.

A hlgh-low temperature shock-wave propagatlng fuze having 52 U.S. c1. ..102/27 R a braided fiberglass lining ver|yin8 radially P s [51] Inn 1 2 19/08 detonating cord. An abrasive resistant, flexible non-metallic 58 Field olSearch ..102 27,7o covering Surrounds the lining and conlains radial explosion and debris thereof without rupture between temperatures of --l00 F. and +400 F.

4 Claims, 1 Drawing figure DETONATING FUZE This application is a continuation-in-part of application Ser. No. 770,962, filed Oct. 28, 1968 and now abandoned.

This invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to me of any royalty thereon.

This invention relates to detonating fuzes, and more particularly, to a shock-wave propagating mild detonating fuze in which a braided fiberglass lining overlies a radially exploding mild detonating cord.

One of the objects of the invention is to provide a shockwave propagating mild detonating fuze which is of light weight construction and which satisfactorily functions between temperatures of-l F. and +400 F.

Another object of the invention is to provide such a highlow temperature fuze which has flexible versatility and is abrasion resistant, withstanding rapid radial expansion without rupture, and wherein gaseous escapement is precluded.

These and other objects, features and advantages will become more apparent from the following description and accompanying drawing in which the sole FIGURE is a longitudinal sectional view, partially broken away of a preferred fuze construction embodying the principles of the invention.

The high-low temperature, shock-wave propagating fuze, shown generally at 10, ha the ends of core 11 of a mild detonating cord in an abutting relationship with a corresponding body of high explosive 12 positioned in a suitable container 13 that is partially exposed from within the aluminum retaining sleeve 14 prior to connection with an appropriate fitting (not shown) as facilitated by the annular sleeve flange 15. The substantial length of core 11, having one grain per foot of PETN or equivalent, has an overlying layer of braided fiberglass 17 upon which there is a layer of white vinyl plastic tubing 18. A triple layer of braided fiberglass l9 overlies the vinyl l8 and has a high-low temperature flexible covering 20 extending over the predetermined fuze length between corresponding crimped sleeve inner end portions 21. An appropriate epoxy resin 22 securely mounts the fuze portions to the inner surface of the sleeve 14 which is stepped dimensions to accommodate varying dimensions of the fuze portions.

The flexible, non-metallic covering 20 is of abrasion resistant fluorinated ethylene polymer (F.E.P.) tubing which is heat shrinkable and has a non-rigid molecular structure and expansion characteristic that enables withstanding a predetermined rapid radial expansion prior to contraction to its pre-expansion size. The F.E.P. tubing ha a wall thickness within the range of 0.10 to 0.25 inches with a preferred thickness of 0.010 inches providing maximum flexibility. Some of the radially exploded debris during shown-wave propagation are absorbed by the innermost fiberglass and vinyl, and the remainder of the debris is absorbed by the triple layer of fiberglass 19 which expands radially with its flexible covering 20 that assuringly contains the radially exploded debris without rupturing between operating temperatures of l00 F. and +400 F.

The light weight, shock-wave propagating, mild detonating fuze has increased versatility in that predeterminedly dimensioned cut lengths of flexible fuze covering finds use in various locations which heretofore were accessably restricted.

Various modifications, alterations or changes may be resorted to without departing from the scope of the invention as defined in the appended claims.

I claim:

1. In a shock-wave propagating mild detonating fuze having a braided fiberglass lining overlying a mild detonating cord which explodes radially,

means for containing radial explosion and debris without ruputre during shock wave propagation operational temperatures between --l00 F. and +400 F. said means including an abrasion resistant flexible non-metallic covering surrounding said lining, and

a body of high explosive positioned at end portions of said cord.

2. The structure of claim 1 wherein said covering is a heat shrunk material.

. The structure in accordance with claim 1 wherein said covering is fiuorinated ethylene polymer tubing.

4. The structure according to claim 3 wherein said tubing has a thickness in the range of 0.010 to 0.025 inches.

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Claims (3)

1. 2. The structure of claim 1 wherein said covering is a heat shrunk material.
2. 3. The structure in accordance with claim 1 wherein said covering is fluorinated ethylene polymer tubing.
3. 4. The structure according to claim 3 wherein said tubing has a thickness in the range of 0.010 to 0.025 inches.

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