| 摘要 |
PCT No. PCT/SE88/00409 Sec. 371 Date Feb. 13, 1990 Sec. 102(e) Date Feb. 13, 1990 PCT Filed Aug. 12, 1988 PCT Pub. No. WO89/01601 PCT Pub. Date Feb. 23, 1989.An apparatus for detonating explosive charges at a given location in response to an initiation at a remote location and after a preselected delay comprises a non-electrical initiation device for generating a non-electrical energy input by detonation or pyrotechnical combustion at the given location and initiated at the remote location, and an electrical igniter also at the given location responsive to the initiation device for time-delayed ignition of the explosive charge. The electrical igniter includes a transducer for generating an electrical output signal in response to the non-electrical energy input, an electronic variable time delay igniter in close proximity to the transducer for setting a preselected time delay and for generating a time delayed electrical output signal and an igniter also in close proximity to the electronic time delay means for initiating the ignition of the explosive charge. The transducer, the electronic time delay igniter, and the electrical the igniter are connected together by a first and a second pair of short electrical conductors constituting the only electrical conductors in the detonating apparatus, thereby minimizing the possibility of a spurious signal being generated in the electrical conductors. |
