Detnet South Africa (pty) Limited

Detnet South Africa Ltd

Albertus Abraham Labuschagne

Andre Louis Koekemoer

Craig Charles Schlenter

Christopher Malcolm Birkin

Michiel Jacobus Kruger

Daniel Auguste Maurissens

Elmar Lennox Muller

David Bruce Harding

Riaan Lingenfelder Van Wyk

Herman Van Der Walt

Schagen Diederik Van Soelen

André Louis Koekemoer

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 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.

Shock tube event validation

A detonator for use in a detonating system, which detonator includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one of a light, acoustic, vibratory, magnetic or electrical signal event, and an electronic timer which executes a timing interval in response thereto.

Detonator

A timing module for use in a detonating system which includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one shock tube event and an electronic timer which executes a timing interval in response thereto.

Detonator including a sensing arrangement

A detonator assembly () which includes a housing (), an explosive () in the housing (), an initiating element () exposed to the explosive (), a circuit for controlling operation of the initiating element (), and a communication arrangement which can establish communication between the circuit and an external controller () at least at one optical frequency.

Detonator assembly

Timing module

The invention provides a blasting system which includes a plurality of electronic detonators which are configured in a blast array which has at least one row and a plurality of detonators in the row, each detonator including a memory in which is stored at least a respective identity code which is dependent, at least, on the row on which the detonator is, and on the detonator's position in the row, a harness which interconnects the detonators, and at least one control unit, connected to the harness, which generates a signal to fire the detonators.

Blasting system and method

A detonator system which includes an array of a plurality of discrete time delay relays () connected in series to one another, and a plurality of detonators () which are respectively connected to the array at spaced intervals ().

Detonator system

A marker for use in a blasting system which includes a harness, the marker including a control unit, a memory in which information is stored and a connector for connection to a selected location on the harness whereby, upon receipt of an enabling signal via the harness, the information is made available by the control unit.

Blast sequence control

A blasting system which includes a control unit, a communications bus which is connected to the control unit, a plurality of detonators which are connected in sequence to the communications bus along its length, and a daisy chain connection between the control unit and the detonators, and wherein, within the sequence of detonators, a first detonator makes use of the daisy chain connection to enable a second following detonator so that data can be exchanged between the control unit and the second detonator using the communications bus.

Blasting system and programming of detonators

A detonator which, once armed, is automatically disarmed after a predetermined time period in the absence of at least one defined signal during such time period.

Growing community of inventors

Brakpan, South Africa

Albertus Abraham Labuschagne