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Title: Spark-safe low-voltage detonator

Abstract

A column of explosive in a low-voltage detonator which makes it spark-safe includes an organic secondary explosive charge of HMX in the form of a thin pad disposed in a bore of a housing of the detonator in an ignition region of the explosive column and adjacent to an electrical ignition device at one end of the bore. The pad of secondary charge has an axial thickness within the range of twenty to thirty percent of its diameter. The explosive column also includes a first explosive charge of CP disposed in the housing bore in the ignition region of the explosive column next to the secondary charge pad on a side opposite from the ignition device. The first CP charge is loaded under sufficient pressure, 25 to 40 kpsi, to provide mechanical confinement of the pad of secondary charge and physical coupling thereof with the ignition device. The explosive column further includes a second explosive charge of CP disposed in the housing bore in a transition region of the explosive column next to the first CP charge on a side opposite from the pad of secondary charge. The second CP charge is loaded under sufficient pressure, about 10 kpsi, tomore » allow occurrence of DDT. The first explosive CP charge has an axial thickness within the range of twenty to thirty percent of its diameter, whereas the second explosive CP charge contains a series of increments (nominally 4), each of which has an axial thickness-to-diameter ratio of one to two. 2 figs.« less

Inventors:
Issue Date:
Research Org.:
AT and T Technologies, Inc., Greensboro, NC (USA)
OSTI Identifier:
6041745
Patent Number(s):
-US-A7214370
Application Number:
ON: DE89011802
Assignee:
Dept. of Energy SNL; ERA-14-029330; EDB-89-079684
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; DETONATORS; DESIGN; CHEMICAL EXPLOSIVES; ELECTRIC SPARKS; INVENTIONS; SAFETY; SPARK GAPS; ELECTRIC DISCHARGES; EXPLOSIVES; 450100* - Military Technology, Weaponry, & National Defense- Chemical Explosions & Explosives

Citation Formats

Lieberman, M.L. Spark-safe low-voltage detonator. United States: N. p., 1988. Web.
Lieberman, M.L. Spark-safe low-voltage detonator. United States.
Lieberman, M.L. Fri . "Spark-safe low-voltage detonator". United States.
@article{osti_6041745,
title = {Spark-safe low-voltage detonator},
author = {Lieberman, M.L.},
abstractNote = {A column of explosive in a low-voltage detonator which makes it spark-safe includes an organic secondary explosive charge of HMX in the form of a thin pad disposed in a bore of a housing of the detonator in an ignition region of the explosive column and adjacent to an electrical ignition device at one end of the bore. The pad of secondary charge has an axial thickness within the range of twenty to thirty percent of its diameter. The explosive column also includes a first explosive charge of CP disposed in the housing bore in the ignition region of the explosive column next to the secondary charge pad on a side opposite from the ignition device. The first CP charge is loaded under sufficient pressure, 25 to 40 kpsi, to provide mechanical confinement of the pad of secondary charge and physical coupling thereof with the ignition device. The explosive column further includes a second explosive charge of CP disposed in the housing bore in a transition region of the explosive column next to the first CP charge on a side opposite from the pad of secondary charge. The second CP charge is loaded under sufficient pressure, about 10 kpsi, to allow occurrence of DDT. The first explosive CP charge has an axial thickness within the range of twenty to thirty percent of its diameter, whereas the second explosive CP charge contains a series of increments (nominally 4), each of which has an axial thickness-to-diameter ratio of one to two. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {7}
}