Ammunition and explosives – Igniting devices and systems
Patent
1987-12-07
1989-07-18
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
102206, F42C 1116, F42D 106
Patent
active
048482323
ABSTRACT:
An apparatus for electrically blasting a number of electric detonators arranged at a plurality of working faces, including a single controller having a power source unit for supplying a D.C. voltage and a plurality of ignition control units for selectively applying the D.C. voltage; a plurality of oscillators each arranged near respective working faces, the number of the oscillators corresponding to that of the ignition control units, each oscillator being energized with the D.C. voltage to generate a high frequency current and being connected to respective ignition control units via an electric wire bundle; and a plurality of lead wires each connected to outputs of respective oscillators. Loop-like leg wires of electric detonators are electro-magnetically coupled with the lead wires with the aid of transformer magnetic cores.
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patent: 4601243 (1986-07-01), Ueda et al.
patent: 4615268 (1986-10-01), Nakano et al.
Kurokawa Koichi
Osumi Yoshiro
Ueda Takeo
Jordan Charles T.
Nippon Oil and Fats Company Limited
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