发明名称 |
DELAY CIRCUIT FOR USE IN ELECTRIC BLASTING SYSTEM |
摘要 |
DELAY CIRCUIT FOR USE IN ELECTRIC BLASTING SYSTEM A delay circuit for use in an electric blasting system including a capacitor for storing electric energy supplied from an electric blaster, an actuation circuit for detecting the stop of voltage supply from the blaster to generate an actuation signal, a circuit for generating clock pulses, a circuit for counting a predetermined number of clock pulses in response to the actuation signal to generate an igniting signal, and a switching circuit for responding to the igniting signal to discharge the electric energy stored in the capacitor through an igniting resistor, the actuation circuit having a zener diode with a threshold voltage. When the voltage supply from the blaster is stopped and the voltage across the zener diode becomes lower than the threshold voltage, the zener diode is cut-off to generate the actuation signal.
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申请公布号 |
CA1326281(C) |
申请公布日期 |
1994.01.18 |
申请号 |
CA19890591104 |
申请日期 |
1989.02.15 |
申请人 |
NIPPON OIL AND FATS COMPANY, LIMITED;HARADA ELECTRONICS INDUSTRY;HITACHI, LTD. |
发明人 |
OCHI, KOJI;HARADA, MASAHIDE;KOBAYASHI, KUNIO |
分类号 |
F42B3/16;F42B3/18;F42C11/06;F42D1/055;F42D1/06;H03K5/135;(IPC1-7):F23Q21/00 |
主分类号 |
F42B3/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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