Abstract: A device for the feeding of poultry including a bowl device comprising a feed bowl, a cupola suspending the feed bowl, and a downpipe. The feed bowl is located beneath the downpipe and the cupola is formed from grid bars. The downpipe comprises an inner cylinder and an outer cylinder encompassing the inner cylinder. The outer cylinder is guided in a rotatable, a raisable and a lowerable manner on the inner cylinder. The bowl device includes at least one lifting stop for delimiting a lifting and lowering path of the bowl. The outer cylinder and the inner cylinder is comprised in each case of adjacent cylinder sections co-axial to each other, whereby face peripheral areas of the cylinder sections turned towards each other are connected to one another by bridging elements which bridge a gap area which corresponds to an interval distance between the cylinder sections.

Abstract: A device for feeding poultry kept in a barn, comprises at least one food supply tube (1) which is held above the floor of the barn such as to be able to be lowered or raised, with a series of branch openings, each provided with a dish device (2) hanging on the supply tube, comprising a dropping tube extending from the branch opening and a feeding dish (4) arranged below, the dropping tube with a spoked arrangement of lattice bars (5) forming the cup of the dish. The dropping tube comprises an inner cylinder (7) leading off from the branch opening and an outer cylinder (8) surrounding the inner cylinder, from which the dish hangs by means of the lattice bars, such as to be placed on the floor of the barn in the lowered state of the food supply tube. The outer cylinder runs on the inner cylinder such as to rotate, be raised or lowered and at least one stop is provided for limiting the raising and lowering stoke.

Abstract: A device for feeding poultry kept in a barn, comprises at least one food supply tube (1) which is held above the floor of the barn such as to be able to be lowered or raised, with a series of branch openings, each provided with a dish device (2) hanging on the supply tube, comprising a dropping tube extending from the branch opening and a feeding dish (4) arranged below, the dropping tube with a spoked arrangement of lattice bars (5) forming the cup of the dish. The dropping tube comprises an inner cylinder (7) leading off from the branch opening and an outer cylinder (8) surrounding the inner cylinder, from which the dish hangs by means of the lattice bars, such as to be placed on the floor of the barn in the lowered state of the food supply tube. The outer cylinder runs on the inner cylinder such as to rotate, be raised or lowered and at least one stop is provided for limiting the raising and lowering stoke.

Abstract: A sitting pole for poultry having a surface designed substantially straight on an incline, forcing the poultry perching on the sitting pole to sit in a defined alignment. The inclined plane is set at an angle of approximately 35°. The surface has a U-shaped profile with a U-base forming the inclined plane. U-legs are provided and are bent off from the U-base. The U-base can be formed by two surface sections that are set at different angles from each other.

Abstract: The characteristic of the improved process for the preparation of 1,5-dihydroxynaphthalene and 1,5-diaminonaphthalene is to carry out the alkaline pressure hydrolysis of the disodium salt of naphthalene-1,5-disulphonic acid at temperatures from 270.degree. to 290.degree. C. and under 14 to 20 bar using an excess of sodium hydroxide solution such that the molar ratio NaOH/disodium salt of naphthalenesulphonic acid is at least 12:1. The 1,5-dihydroxynaphthalene which is obtained in this manner, without hazard and in substantially higher purity, is then aminated with ammonia in the presence of ammonium bisulphite to give 1,5-diaminonaphthalene, it being possible to achieve a further increase in the degree of purity of the 1,5-diaminonaphthalene by increasing the molar ratio NH.sub.3 /1,5-dihydroxynaphthalene to at least 6:1.

Abstract: Reactions of liquid starting substances to give chemical compounds in which these chemical compounds are obtained as solids can be carried out by spraying the liquid starting substances from separate nozzles such that the liquid starting substances are mixed in the spray cones, which penetrate one another, and thereby react.