A timing element for an initiator is made from a reactive polymeric material such as, e.g., a glycidyl azide polymer. The reactive polymeric material may include pulverulent oxidizer additives, such as ammonium, perchlorate and/or ferric oxide. The oxidizer additives are used to increase the rate of
A timing element for an initiator is made from a reactive polymeric material such as, e.g., a glycidyl azide polymer. The reactive polymeric material may include pulverulent oxidizer additives, such as ammonium, perchlorate and/or ferric oxide. The oxidizer additives are used to increase the rate of reaction and the output spark of the polymer material. The timing element serves to delay the travel of an initiation signal between an input, such as a signal transmission input line, and an explosive output charge, for a predetermined period of time, usually about 5 to about 10,000 milliseconds, e.g., about 9 to about 9600 milliseconds.
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1. A timing element comprising a delay composition wherein the delay composition comprises a solid core of cross-linked reactive polymeric material containing a fuel component and an oxidizer component, both components being dispersed within the solid core of the reactive polymeric material, the rea
1. A timing element comprising a delay composition wherein the delay composition comprises a solid core of cross-linked reactive polymeric material containing a fuel component and an oxidizer component, both components being dispersed within the solid core of the reactive polymeric material, the reactive polymeric material being enclosed in a sheath. 2. A timing element comprising a delay composition wherein the delay composition comprises a solid core of cross-linked reactive polymeric material enclosed in a sheath. 3. The timing element of claim 2 wherein the reactive polymeric material comprises a GAP material. 4. The timing element of claim 3 wherein the reactive polymeric material comprises a cross-linked GAP acrylic material. 5. The timing element of claim 3 wherein the reactive polymeric material comprises a cross-linked GAP urethane material. 6. The timing element of claim 3 further comprising an oxidizer component dispersed within the solid core of the reactive polymeric material and present therein as a pulverulent oxidizer material. 7. The timing element of claim 6 wherein the oxidizer component comprises about 0.25% to about 10% of the delay composition, by weight. 8. The timing element of claim 3 or claim 6 further comprising a fuel component dispersed within the solid core of the reactive polymeric material and present therein as a pulverulent fuel. 9. The timing element of claim 8 wherein the pulverulent fuel component comprises about 0.25% to about 2% of the delay composition, by weight. 10. The timing element of claim 8 wherein the fuel component is present in an amount of about 1% of the delay composition, by weight. 11. The timing element of claim 2 or claim 3 wherein the sheath comprises one or more of polyacrylonitrile, polybutadiene, polystyrene, ABS copolymer, polyphenylene oxide, polysulfone, cellulose acetate butyrate, and modified ethylene acrylate polymeric material. 12. A method for making a timing element, the method comprising disposing a curable precursor resin of a reactive polymeric material in a sheath, and then cross-linking the curable precursor resin to form a solid core of cross-linked reactive polymeric material in the sheath. 13. The method of claim 12 wherein the sheath comprises a polymeric material, the method comprising injecting the curable precursor resin into a sleeve under pressure sufficient to expand the diameter of the sheath by about 0.4% to about 1.2%. 14. The method of claim 12 wherein the curable precursor resin comprises a GAP resin and a cross-linking agent. 15. The method of claim 14 wherein an oxidizer component is present in the resin as a pulverulent oxidizing material. 16. The method of claim 15 wherein the oxidizer component is present in an amount of about 0.25% to about 10% of the cross-linked reactive polymeric material, by weight. 17. The method of claim 14 or claim 15 wherein a fuel component is present in the resin as a pulverulent fuel component. 18. The method of claim 17 wherein the fuel component is present in an amount of about 0.25 to about 2% of the cross-linked reactive polymeric material, by weight. 19. The method of claim 12 wherein the curable precursor resin comprises at least about 20% DPEHA. 20. The method of claim 19 wherein the curable precursor resin comprises from about 20% to about 40% DPEHA. 21. The method of claim 20 wherein the curable precursor resin comprises at least about 29% DPEHA. 22. In an initiator comprising: a shell having a closed end and an opening for a signal transmission tube;an output charge in the closed end of the shell;a signal transmission fuse secured in the opening; anda timing element in the shell situated to be initiated by the fuse and to initiate the output charge,the improvement comprising that the timing element comprises a solid core of cross-linked reactive polymeric material. 23. The initiator of claim 22 wherein the solid core of reactive polymeric material is encased in a sheath. 24. The initiator of claim 22 or claim 23 wherein the reactive polymeric material comprises a GAP material. 25. The initiator of claim 22 wherein the improvement further comprises that the solid core of reactive polymeric material contains a fuel component dispersed within the reactive polymeric material. 26. The initiator of claim 22 wherein the improvement further comprises that the solid core of reactive polymeric material contains an oxidizer component dispersed within the reactive polymeric material. 27. The initiator of claim 22 wherein the improvement further comprises that the solid core of reactive polymeric material contains dispersed therewithin a fuel component and an oxidizer component, and the oxidizer component and the fuel component are each present as respective pulverulent materials, the oxidizer component comprising about0.25% to about 10% of the reactive polymeric material, by weight, and the fuel component comprising about 0.25 to about 2% of the reactive polymeric material, by weight.
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이 특허에 인용된 특허 (52)
Manzara Anthony P. (Lake Elmo MN), Azido polymers having improved burn rate.
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Andersson Lars (Nora SEX) Danertz Karl-Erik (Nora SEX) Jidestig Goran (Nora SEX), Low energy fuse having improved properties in both axial and radial directions.
Kristensen Leif (Nora SEX) Lundborg Hans (Nora SEX) Nyqvist Stig (Nora SEX), Low-energy fuse consisting of a plastic tube the inner surface of which is coated with explosive in powder form.
Nickolay Iliych Rabotinsky RU; Vladimir Vasilievitch Furne RU; Uriy Gennadievitch Pechenev RU; Igor Vasilievitch Nikitin RU; Irina Genadievna Beljankina RU; Ernest L. Gladden, Method of making a signal transmission fuse.
Robins Kendall H. (Bloomfield CT) Austin Dennis K. (Simsbury CT) Spraggs Richard W. (Simsbury CT), Non-electric signal transmission device connection, method and apparatus therefor.
Thureson Gary R. (Avon CT) Gladden Ernest L. (Granby CT), Nonelectric blasting initiation signal control system, method and transmission device therefor.
Gladden Ernest L. (Granby CT) Thureson Gary R. (Avon CT) Zappalorti Alvaro (Avon CT) Davis Eric R. (Torrington CT) Lucca Frank J. (Granby CT), Signal transmission fuse.
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