Fig. 147. BAR ELECTRO-MAGNET.
Electro-magnet, Bar.
A straight bar of iron surrounded with a magnetizing coil of wire. Bar
electromagnets are not much used, the horseshoe type being by far the
more usual.
Electro-magnet, Club-foot.
An electro-magnet, one of whose legs only is wound with wire, the other
being bare.
Fig. 148. CLUB-FOOT ELECTRO-MAGNETS WITH HINGED ARMATURES.
Electro-magnet, Hinged.
An electro-magnet whose limbs are hinged at the yoke. On excitation by a
current the poles tend to approach each other.