Magnet-coil. A coil of insulated wire enclosing a core of soft iron through which a current of electricity is passed to magnetize the iron.
Magnet-core. An iron bar or mass of iron around which insulated wire is wound in order to create an electro-magnet.
Magnet, Electric. A magnet consisting of a bar of iron, a bundle of iron wires, or an iron tube, around which a coil of insulated wire is wound. When a current is passing through the coil its influence magnetizes the iron core, but directly the current ceases the magnetism disappears.
Magnet, Field. The electro or permanent magnet in a dynamo or motor, used to produce the area of electric energy.
Magnet, Horseshoe. A magnet of U shape with the poles or ends brought closer together than the other parts of the limbs. A soft iron bar is placed across the poles when not in use, as this serves to conserve the magnetism.
Magnet, Permanent. A term applied to a hard steel magnet possessing high retentivity, or the power to hold its magnetism indefinitely.
Magnet, Regulator. An electro-magnet whose armature moves in such a manner as to automatically shift the commutator-brushes, on a motor or dynamo, to a position which insures the preservation of both brushes and commutator-bars, and also produces a constant current.
Magnet, Simple. A magnet made of one piece of metal.
Magnet Wire. Insulated wire used for coils. Cotton or silk covered wire is the most serviceable for winding magnets.
Magnetic Adherence. The tendency of a mass of iron to adhere to the poles of a magnet.