ES346910A1 - Self-disarming electric blasting caps and assembly containing same - Google Patents

Abstract

An electric detonator device capable of being deactivated when detonation fails while it is submerged in water, which comprises an elongated, closed hull; an explosive charge in the base or base, placed in one of the ends of said helmet; an ignition dielectric plug, placed in said helmet in sealing relation with the helmet and spacing of said load of the boot; a pair of detonator wires, which extend longitudinally and penetrate into said hull through the end opposite the end in which the load of the boot is placed and which are in direct sealing contact with said dielectric plug and which end within said helmet at an intermediate point between said load of the culotte and said ignition plug; a bridge wire connecting the terminal ends of said detonator wires in order to form an electrical circuit with said wires; an ignition composition placed inside said helmet in direct contact with said bridge wire; said inflammation composition being inflammable as a result of the heat produced by said bridge wire when an electric current passes through said circuit, and said explosive charge of the boot being arranged in functional communication with said inflammation composition in order to be detonated as a consequence of the inflammation of said inflammation load; characterized by a substance forming a corrosión agent, disposed within said detonator assembly, substance that is chemically inert with respect to all the components of said assembly but which, upon contact with water, forms a corrosión agent that affects to any one of the wires in said circuit and said corrosión agent being formed in an amount sufficient to corrode any one of said wires and interrupt said circuit; said substance being taken from the corrosión agent within said assembly in order to allow direct contact between said corrosión agent, once it is formed, and said circuit and corrode the circuit in the manner already described; elements for the entry of the water in said assembly that serve to admit the water from the outside of said helmet and put it in contact with said substance forming the corrosión agent at a rate and in such quantity that the formation of said agent is caused of corrosión in order to interrupt said circuit after the expiration of the preset period, thereby deactivating the detonator assembly. (Machine-translation by Google Translate, not legally binding)