Abstract: A novel flying toy comprising a ringed or banded rotor launched by a pulled string. The rotor has an outer ring or band and an inner circular disk connected by a plurality of curved blades. The rotor rests upon a spindle set in one end of a handle grasped by the user. The rotor is loosely held by pins in the spindle. A string is wound around the spindle and pulled by the user. The spindle and rotor are spun rapidly causing the rotor to lift off the pins and into the air. The outer band contains air near the blades, and coupled with the configuration of the blades, contributes greatly to aerodynamic lift and flight stability.

Abstract: The invention relates to a novel device for fixing a partition to a shell (4) of a tube mill in which the partition comprises a cast framework (1), in steel or in cast iron consisting of several sectors (15) provided with a set of fixing holes (32) in their peripheral face (3), each sector (15) being independent of the other sectors, characterized in that it possesses an annular intermediate baseplate (100) arranged facing the said shell (4), providing a space between the shell (4) and the intermediate baseplate (100), which space is chosen so that the inner face of the intermediate baseplate (100) forms a reference surface at the nominal diameter of the periphery of the said cast sectors (15), this space being set with the aid of adjustment elements (110) and the intermediate baseplate (100) being provided with holes (102) which can be matched to the said set of fixing holes (32) in the peripheral face (3) of the sectors (15) in order to enable the latter to be fixed by means of bolts in the holes of the int

Abstract: A device for holding the grates or backside plates of a partition in a tube mill, the partition being made of a frame that is flame cut or cast, in steel or iron. The frame is provided with anchor holes. The holding device is made of a perforated plate held on the partition frame, and is perpendicular to the mill axis, the perforated plate being provided with anchor holes for the grates or backside plates, the holes being, for a given diameter, always identically positioned so that for the given diameter, the same grates or backside plates are always used irrespective of the shape of the partition frame.