Blasting arrangement
AssigneeDetnet South Africa (Pty) Ltd
InventorAbraham Johannes Liebenberg
Life of this patent
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Abstract
For use in a blasting system (10), a visible, throw-away, safety lockout device (30) which operates automatically, to interrupt power to the blasting system (10), upon the occurrence of one or more defined fault conditions.
Claims10
A blasting arrangement (10) which includes an energy source (20), at least one detonator (18), a blast controller (12), a circuit (16) which establishes a connection between the energy source (20) and the detonator (18) and which, in response to a signal from the blast controller (12), allows energy from the energy source (20) to initiate the detonator (18), and a device (30) which, in response to at least one actuating signal, is operable:
- (a) to break the connection, thereby preventing initiation of the detonator (18);
- and
- (b) to produce a discernable indication, of its operation, characterised in that the device (30) includes a fuse (32) and in that the device (30) upon operation, is rendered non-usable by open-circuiting the fuse (32).
Dependencies are inferred from the claim text.