Bonfire-safe low-voltage detonator
Abstract
A column of explosive in a low-voltage detonator which makes it bonfire-safe includes a first layer of an explosive charge of CP, or a primary explosive, and a second layer of a secondary organic explosive charge, such as PETN, which has a degradation temperature lower than the autoignition temperature of the CP or primary explosives. The first layer is composed of a pair of increments disposed in a bore of a housing of the detonator in an ignition region of the explosive column and adjacent to and in contact with an electrical ignition device at one end of the bore. The second layer is composed of a plurality of increments disposed in the housing bore in a transition region of the explosive column next to and in contact with the first layer on a side opposite from the ignition device. The first layer is loaded under a sufficient high pressure, 25 to 40 kpsi, to achieve ignition, whereas the second layer is loaded under a sufficient low pressure, about 10 kpsi, to allow occurrence of DDT. Each increment of the first and second layers has an axial length-to-diameter ratio of one-half.
- Inventors:
-
- Albuquerque, NM
- Issue Date:
- Research Org.:
- AT&T
- OSTI Identifier:
- 867293
- Patent Number(s):
- 4907509
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C06 - EXPLOSIVES C06C - DETONATING OR PRIMING DEVICES
F - MECHANICAL ENGINEERING F42 - AMMUNITION F42B - EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- DOE Contract Number:
- AC04-76DP00789
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- bonfire-safe; low-voltage; detonator; column; explosive; makes; layer; charge; cp; primary; secondary; organic; petn; degradation; temperature; autoignition; explosives; composed; pair; increments; disposed; bore; housing; ignition; region; adjacent; contact; electrical; device; plurality; transition; opposite; loaded; sufficient; pressure; 25; 40; kpsi; achieve; 10; allow; occurrence; ddt; increment; layers; axial; length-to-diameter; ratio; one-half; axial length; ignition temperature; explosive charge; ignition device; transition region; diameter ratio; electrical ignition; ignition region; low-voltage detonator; degradation temperature; organic explosive; /102/
Citation Formats
Lieberman, Morton L. Bonfire-safe low-voltage detonator. United States: N. p., 1990.
Web.
Lieberman, Morton L. Bonfire-safe low-voltage detonator. United States.
Lieberman, Morton L. Mon .
"Bonfire-safe low-voltage detonator". United States. https://www.osti.gov/servlets/purl/867293.
@article{osti_867293,
title = {Bonfire-safe low-voltage detonator},
author = {Lieberman, Morton L},
abstractNote = {A column of explosive in a low-voltage detonator which makes it bonfire-safe includes a first layer of an explosive charge of CP, or a primary explosive, and a second layer of a secondary organic explosive charge, such as PETN, which has a degradation temperature lower than the autoignition temperature of the CP or primary explosives. The first layer is composed of a pair of increments disposed in a bore of a housing of the detonator in an ignition region of the explosive column and adjacent to and in contact with an electrical ignition device at one end of the bore. The second layer is composed of a plurality of increments disposed in the housing bore in a transition region of the explosive column next to and in contact with the first layer on a side opposite from the ignition device. The first layer is loaded under a sufficient high pressure, 25 to 40 kpsi, to achieve ignition, whereas the second layer is loaded under a sufficient low pressure, about 10 kpsi, to allow occurrence of DDT. Each increment of the first and second layers has an axial length-to-diameter ratio of one-half.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}