A device for detonating an explosive charge; usually consists of a machine by which an operator, by pressing downward or otherwise moving a handle of the device, may generate a powerful transient electric current which is transmitted to an electric blasting cap. Also known as blasting machine.

Related Terms


  1. The field of influence which an electric current produces around the conductor through which it flows. 2. A rapidly moving electric field and its associated magnetic field located at right angles to both electric lines of force and to their direction of motion. 3. The magnetic field resulting from the flow of electricity.


Any plot, graph, or tracing produced by the action of an electric current on prepared sensitized paper (or other chart material) or by means of an electrically controlled stylus or pen.


A conductor buried in the ground, used to maintain conductors connected to it at ground potential and dissipate current conducted to it into the earth, or to provide a return path for electric current in a directcurrent power transmission system. Also known as earth electrode; grounding electrode.


(CM) the use of various technologies to determine the condition of equipment, at a specific moment in time, using minimal or non-invasive means. Common tools used in condition monitoring are vibration analysis, oil analysis, ferrography, thermography, electric current wave form analysis and boroscopic examination. Supplemental technologies, such as demodulation, ultrasonic analysis, shock-pulse, spike-energy, HFD, etc., for roller bearing element condition monitoring, may be used in addition to vibration analysis.


An instrument for measuring the magnitude of a small electric current or for detecting the presence or direction of such a current by means of motion of an indicator in a magnetic field.


A flash, caused by an electric current ionizing a gas or vapor.


A crystalline substance which allows electric current to pass in only one direction


A cable carrying an electric current for degaussing a vessel


Electrode, without metallic connection with the current supply, one face of which acts as anode surface and the opposite face as a cathode surface when an electric current is passed through a cell.


The structure within a battery electrode that provides a path for the electric current to or from the active material. Also known as current collector.

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