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 »
- Inventors:
- Issue Date:
- Research Org.:
- AT and T Technologies, Inc., Greensboro, NC (USA)
- OSTI Identifier:
- 6041745
- Patent Number(s):
- 7214370
- Application Number:
- ON: DE89011802
- Assignee:
- Dept. of Energy
- Patent Classifications (CPCs):
-
A - HUMAN NECESSITIES A23 - FOODS OR FOODSTUFFS A23K - FODDER
A - HUMAN NECESSITIES A23 - FOODS OR FOODSTUFFS A23L - FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A23B - A23J
- 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. https://www.osti.gov/servlets/purl/6041745.
@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}
}