Abstract: A method is provided for surveillance and balancing of coal dust supply through channels to coal furnaces. Data is gathered from results of automatic sample collections of coal dust particles conveyed by air current in circular channels from a coal crusher to a coal furnace. Data is processed for generating control parameters for a cross-section area regulating draught control unit in each of the respective channels. Each control parameter is adapted to control a respective draught control unit to change cross-section of the channel in size and direction for reducing differences in coal dust conveyance of channels. A completely or practically constant surveillance and balancing of coal dust supply in two or more channels to a coal furnace can be made automatically, resulting in reduced emission and/or improved fuel economy. A collector and a draught control unit apparatus for carrying out the method is also provided.

Abstract: An apparatus for exercising and training of animals with a movable floor formed by an endless belt which may be driven with any desired speed, and whereby to enable the floor to simulate as closely as possible, the elasticity and the like physical properties of the natural surface as f.inst. the turf, the upper portion of the belt is supported by and sliding on a smooth plate, and the endless belt is made of a flexible plastic material with a low coefficient of friction, which on the outward side is covered by a coir mat with long upright pile, and the supporting plate resting on rubber blocks.