Patent ID: 6943285

Claim:
A bipolar discharge-dissipation lightning air-terminals comprising: a base member fixed and installed in a top region of a protected object, including a coupling projection on whose inner periphery surface coupling screw grooves are formed, the coupling projection protruded and formed at side of an upper surface of the base member, and a grounding piece formed at a side opposite to the coupling projection in order to ground an earth electrode and a grounded lightning conductor; a discharge member coupled releasably to the base member, for focusing an earth charge following a thundercloud approach on the upper surface of the base member; and a potential modifying unit attached releasably on the discharge member so that the potential modifying unit is charged with different charges by electric dipole, bipolar and electric double layer action according to a thundercloud approach in order to disperse and discharge the earth charge in a space spaced from the discharge member.