| 摘要 |
An electronic blasting cap (10) includes a housing (12) which is closed at one end and has adjacent thereto it a base charge (14), a primer charge (16) and an ignition charge (18). The charges (14, 16, 18) are positioned within housing (12) by a metal capsule (20). An electric match assembly (26) is positioned within an insulated spacer (24) within housing (12). An electronic module (32) comprising an electronic delay circuit (90) fixed within a potting compound is positioned within housing (12). A sealing plug (38) closes housing (12) by means of crimps (40, 42). An input signal is received over leg wires (34, 36) for storing an electric charge within circuit 90 which fires the electric match assembly 26 following a preset time delay.
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