Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent
1995-04-25
1996-11-05
Carone, Michael J.
Ammunition and explosives
Igniting devices and systems
Ignition or detonation circuit
102218, 361249, 361251, F42D 1055
Patent
active
055719856
ABSTRACT:
A sequential blasting system for use in particular in mining comprises a plurality of detonator stages S1, S2, . . . , each of which contains a series circuit consisting of a thyristor T and a detonator means ZE, said series circuit being interposed between two supply leads A, O; B, 0. The signal voltage for the thyristor T in each stage is derived solely from the switching state of the thyristor T of the preceding stage. This causes activation to be transferred from stage to stage independently of the detonator means ZE, in particular irrespectively of whether or not a detonator has been attached and whether or not this detonator becomes highly resistive or not as it should upon being activated. This eliminates the errors that have occurred in known circuits. Upon firing the blasting system, such errors can cause the detonation to occur not only at the first detonator stage, but simultaneously at a location where a detonator is missing as well. In other cases, such errors terminate the detonating sequence at the site of an improperly functioning detonator and induce impermissible delays and thus considerably shorten the length of time between the electrical sequence and the blast, thus causing undesirable changes in the shock wave caused by the blasting sequence.
REFERENCES:
patent: 3099962 (1963-08-01), Smith
patent: 3468255 (1969-09-01), Stryker
patent: 3559582 (1971-02-01), Hrzek
patent: 3808459 (1974-04-01), Guimier et al.
patent: 3823344 (1974-07-01), Havas
patent: 3892182 (1975-07-01), Covarrubias et al.
patent: 3895265 (1975-07-01), Watrous
patent: 4099467 (1978-07-01), MacKellar et al.
patent: 4489655 (1984-12-01), Molnar
patent: 4610203 (1986-09-01), Bock
patent: 4760791 (1988-08-01), Bock
Ritter Heinz
Steinbichler Wolf
Carone Michael J.
Euro-Matsushita Electric Works AG.
Montgomery Christopher K.
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