| 摘要 |
<p>A device for initiating an electric detonator utilizing an open circuit to decrease occurrences of accidental detonation. The device may include an initiator housing (12), at least two conductor pins (14) disposed through the initiator housing and spaced within the housing such that they are electrically isolated from one another, and a primer spot material (16) disposed between the conductor pins. The primer spot material may be comprised of a mixture of reactive material and metal component. The primer spot material has electrical properties which provide resistance to conducting an electrical current to maintain an open circuit condition prior to occurrence of a breakdown voltage which is dependent upon the amount of metal component in the primer spot material. Subsequently, the primer spot material has electrical properties which provide a conductive medium on the occurrence of an electrical arc between the conductive pins that arises at voltages in excess of the breakdown voltage. Finally, the electrical properties are such that the electrical arc provides energy to form a plasma from the primer spot material, leading to initiation of the detonator.</p> |
