Abstract: An electrostatic generator for frictionally producing static electricity includes a flexible conductor hose arranged for communication therewith to permit static electricity directed through the conductor hose to be utilized for attracting objects thereto. The device includes a connector hose head operable to regulate the attractive force generated upon the object.

Abstract: The present specification discloses a disclosure for sealing off dis-used open mineshafts. The closure comprises an open topped basket-like framework which has a polygonal shape with a side wall which tapers from the open top towards the base of the basket-like framework. The base has a conical shape with the apex of the conical shape extending inwardly of the basket. When at least partially filled with infill, the conical base positions the infill adjacent to the side wall and tends to force the side wall outwards, securing the basket-like framework in a mineshaft.