Abstract: The invention consists of arranging a number of wire bundles on a supporting disc in openings of the disc, provided in circular rows coaxial with the disc and at different distances from the periphery of the disc.

Abstract: This invention relates to a brush consisting of a number of disc shaped elements molded into a unit-each disc supporting wire bundles extending from one side to the other through holes substantially larger than the cross-section of the corresponding wire bundle, each disc being impregnated with an elastomer to permit applying power under pressure of the elastomer.

Abstract: The invention relates to an apparatus for the conversion of plastic waste into usable material, in which a number of rotating knives are arranged at the bottom of a cylindrical space receiving the plastic waste, and in which by deflecting means arranged along the periphery of said space, the plastic waste, while being cut and circulated by the rotating knives, is directed back into the path of said rotating knives.

Abstract: The invention relates to an antenna structure comprising a number of parallel conductors having dimensions and spacings which are small against operating wavelength, and positioned perpendicular to a conducting ground plane; the upper ends of the conductors are terminated by metal plates acting as capacitors against the ground plane, and interconnected by inductive elements, the lower ends of some of said conductors are electrically connected to said ground plane, while another one of these conductors is connected to a power source to impress a voltage between the lower end of said other conductor and said ground plane.