Detnet South Africa (pty) Limited

Daniel Auguste Maurissens

Andre Louis Koekemoer

Michiel Jacobus Kruger

Albertus Abraham Labuschagne

Christopher Malcolm Birkin

Richard Joseph Michna

A blasting system which includes a plurality of detonators located in respective boreholes each detonator being capable of two-way communication, and wherein a signal from control equipment is relayed from one detonator to another and then to a target detonator.

Energy efficient wireless detonator system

A detonator which is responsive to a shock tube event which is validated if a link is fused at a predetermined time interval after a light signal produced by the event is detected and if, at the end of a subsequent time interval, the link is still fused and the light signal is absent.

Method of validating a shock tube event

A detonator which is used with a shock tube or a fibre optic cable and wherein an incident light signal is passed through a first impedance for communication purposes and a light signal associated with initiation of the detonator is passed through a second impedance which is less in value than the first impedance.

Light sensitive arrangement for a detonator

A detonator which includes a housing which has a passage with an inlet and an outlet and which is of reducing cross sectional area from the inlet to the outlet and wherein the inlet is configured to be exposed to an end of a shock tube, and a fusible link is located at the outlet.

Detonator sensing arrangement

A control circuit for a detonator which includes a charger pump with an inductor which is connected to earth via a fusible link and wherein the charge pump is placed in an operative mode to produce a charging voltage for a firing capacitor if the link is fused in response to a shock tube event.

Control circuit for a detonator

A detonator which is initiated by a shock tube event which is validated if a processor determines that a fusible link was not fused by a shock tube event at a predetermined time interval before light generated by the shock tube event is detected.

Growing community of inventors

Orbe, Switzerland

Daniel Auguste Maurissens