Ael Mining Services Limited

Detnet South Africa Proprietary Limited

Clifford Gordon Morgan

Pieter Stephanus Jacobus Halliday

Elmar Lennox Muller

Paul Dastoor

Warwick Belcher

Xiaojing Zhou

Glenn Bryant

Pieter Stephanus Halliday

Hendrik Cornelius Bezuidenhout

Cheryl Lynn Kelly

Andries Matthys Botha

Craig Rimmington

Hendrik Cornelius Bezudenhout

Shane Pheasant

Samir Kumar Mukhopadhyay

George Diederick Labuschagne

An explosives detonator system includes a detonator housing within which is provided a detonation circuit that includes a conductive pathway having a fuse head integrated therewith such that the conductive pathway passes along both electrodes and a resistive bridge of the fuse head. An uncharged chargeable voltage source is also integrated with the detonation circuit and is electrically sensitive to a charging property which is included in a charging signal. Exposure to the charging property charges the voltage source, thereby rendering it capable of generating a potential difference between the electrodes at least to equal the breakdown voltage of the resistive bridge. The charging property is any one or more of a charging light pulse, a charging temperature, a charging pressure and a charging radio frequency.

Detonation of explosives

A signal tube connector which can be used with a number of signal tubes which includes a detonator receiving body and a retention member, wherein a signal tube locating space is formed between opposing surfaces of the body and the member and wherein the retention member is movable relative to the body and can be locked in place with a locking mechanism to retain signal tubes within the space.

Signal tube connector

An explosives detonator system for detonating an explosive charge with which it is, in use, arranged in a detonating relationship is provided. On acceptance of a detonation initiating signal having a detonation initiating property, the system initiates and thus detonates the explosive charge. The system includes an initiating device which accepts the detonation initiating signal and initiates and thus detonates the explosive charge. The initiating device is initially in a non-detonation initiating condition, in which it is not capable of accepting the detonation initiating signal. The system also includes a radio frequency identification (RFID) based switching device that detects a switching property of a radio switching signal that is transmitted to the detonator system and switches the initiating device, on detection of the detonation initiating property, to a standby condition in which the initiating device is capable of operatively accepting the detonation initiating signal when it is transmitted thereto.

An explosives detonator system for detonating an explosive charge with which it is, in use, arranged in a detonating relationship is provided. On acceptance of a detonation initiating signal having a detonation initiating property, the system initiates and thus detonates the explosive charge. The system includes an initiating device which accepts the detonation initiating signal and initiates and thus detonates the explosive charge. The initiating device is initially in a non-detonation initiating condition, in which it is not capable of accepting the detonation initiating signal. The system also includes a switching device that detects a chemical compositional component as a switching property of a switching signal that is transmitted to the detonator system, with the switching device being capable of switching the initiating device, on detection of the chemical compositional component, to a standby condition in which the initiating device accepts the detonation initiating signal when it is transmitted thereto.

A method of manufacturing a pyrotechnic time delay composition includes admixing together a solid oxidizer, a solid fuel and water to form an aqueous slurry. The slurry is transformed into droplets. The droplets are gas-dried to form particles comprising the oxidizer and the fuel, with the particles thus constituting a pyrotechnic delay composition.

Manufacture of pyrotechnic time delay compositions

Growing community of inventors

Kempton Park, South Africa

Clifford Gordon Morgan