Earth Inductor

This is an improved form comprising a coil of different number of turns (1000, 2000 or 5000 turns) of 36 SWG copper wire wound on an aluminum metal ring (150 mm dia.) A stop limiting rotation to 1800 of the ring is provided with the help of the spring. The cradle supporting the coil of cast non-magnetic alloy 200 x 210 x 115 mm high may be placed either on its base or side so that the axis of rotation of the coil is either horizontal or vertical .