Spark-safe low-voltage detonator

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:867080

Lieberman, Morton L ^[1]

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1. Albuquerque, NM

A column of explosive in a low-voltage detonator which makes it spark-safe ncludes 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.

• Research Organization: AT&T
• DOE Contract Number: AC04-76DP00789
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 4858529
• OSTI ID: 867080
• Country of Publication: United States
• Language: English

Related Subjects

spark-safe
low-voltage
detonator
column
explosive
makes
organic
secondary
charge
hmx
form
pad
disposed
bore
housing
ignition
region
adjacent
electrical
device
axial
thickness
range
twenty
thirty
percent
diameter
cp
opposite
loaded
sufficient
pressure
25
40
kpsi
provide
mechanical
confinement
physical
coupling
transition
10
allow
occurrence
ddt
contains
series
increments
nominally
thickness-to-diameter
ratio
explosive charge
sufficient pressure
ignition device
transition region
diameter ratio
electrical ignition
ignition region
low-voltage detonator
pad disposed
secondary char
charge pad
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