초록 ▼

A detonator of the type comprising an electrically-fired fusehead in an explosive charge comprises a conditioning means which has two states, normal and armed, and a control means for effecting a change from normal to armed state. The detonator cannot be fired when the conditioning means is in the n

A detonator of the type comprising an electrically-fired fusehead in an explosive charge comprises a conditioning means which has two states, normal and armed, and a control means for effecting a change from normal to armed state. The detonator cannot be fired when the conditioning means is in the normal state, and the control means may comprise electronic circuitry for recognizing and acting only on appropriate control signals. Accidental and unauthorized firing can thus be eliminated. Other embodiments include an actuator incorporating a delay capable of remote precise calibration and a safety device for reducing still further any risks involved when using these detonators in blasting operations. The detonator is preferably in modular form wherein the coupling together of the detonator, actuator, power unit, etc. forms the necessary electrical connections.

대표청구항 ▼

A detonator system responsive to a predetermined input signal from a control device comprising: housing means; an explosive charge disposed within said housing means; fusehead connectors extending from said explosive charge; conditioning means in said fusehead connectors for placing said fusehead co

A detonator system responsive to a predetermined input signal from a control device comprising: housing means; an explosive charge disposed within said housing means; fusehead connectors extending from said explosive charge; conditioning means in said fusehead connectors for placing said fusehead connectors in one of a normal sate and an armed state so that when in said normal state said fusehead connectors are incapable of carrying a voltage or current sufficient to cause explosion of said explosive charge and when in said armed state said fusehead connectors can carry said voltage or current sufficient to cause explosion of said explosive charge; control means for changing said conditioning means from said normal state to said armed state upon input of an output arm signal; and an actuator in close proximity to said conditioning means and said control means including: means for inputting a predetermined input signal from said control device, means for generating said output arm signal upon input of said predetermined input signal to cause said control means to change from said normal to said armed state, and means for generating an output actuate signal to cause explosion of said explosive charge a predetermined period after input of said predetermined input signal.