Magnadet (tradename), a device to initiate electric detonators by a transformer coupling outside the blasthole. See ‘detonator transformer coupled’.
magneto or dynamo exploder, a blasting machine that produces an electric current to initiate electric detonators. Principle 1. By punching down a rack bar that through set of gears, spins the rotor in a DC generator. The electric energy from the generator is connected to the output terminals when the rack bar reaches the bottom where it closes a switch in its downward travel. Principle 2. A spring is first wound and with the help of the key, it is released suddenly. Easy to operate units, in which a set of gears, spins the rotor in a DC generator.