Patent ID: 9091520
Filing Date: 2015-07-28
Classification: F42B,F42C,F42D

Abstract:
1. An explosives detonator for detonating an explosive charge, the detonator including: an initiating device which comprises a printed electronic detonation circuit that includes wherein the detonator further includes; a radio frequency identification (RFID) based switching device that is programmed as a switch and is sensitive to a switching property of a radio switching signal that is transmitted to the detonator in use, the sensitivity of the RFID based switching device to the switching property being such that, on detection of the switching property, the RFID based switching devices switches the initiating device from the non-detonation initiating condition into a standby condition in which the initiating device can operatively accept the detonation initiating signal and thereby switch into a detonation initiating condition, wherein the voltage source includes an electrically chargeable or rechargeable component that is electrically charged on exposure to a charging property of a charging signal to a magnitude sufficient to generate a voltage difference across the electrodes that exceeds the breakdown voltage specification, the charging signal being a shock signal that is generated, in use, by a shock tube, and wherein the printed electronic detonation circuit is printed onto a substrate, by one or more of inkjet, gravure, screen printing, offset lithography, flexography.