Abstract: To permit close matching of compaction pressure being applied to foundry mold making material, such as foundry sand, to the shape of a mold pattern (2) in a pattern box (3, 4), individual fluid pressure is applied to a plurality of press plungers (7) located on a pressure plate which is moved towards the sand in the mold box at a high rate of speed, the press plungers being biassed by fluid pressure to have a maximum difference (.DELTA.H) in stroke of penetration depth of at least 30% of the height (H) of the mold box; individual valves (14) can apply compressed air to individual cylinders under control, for example, of a microprocessor; the valves can be located in a matrix arrangement (FIG. 3). The method and apparatus can be used in combination with explosion or pressure impulse compaction and fluidizing of the foundry sand.

Abstract: In an exemplary embodiment a unit which can be rotated about vertical axes, essentially comprises an x-ray tube and a film carrier, with a head support arranged therebetween and used for the support of a patient's head. The head support is adjustably arranged in a horizontal plane relative to a mounting therefor so the head can be held in various positions for various object exposures. The adjustable positions are marked on an index field according to the different object exposures and can be selected by means of position selectors. A scanning device having signal indicators is coupled to the position selectors so that the position of the head support relative to its mounting is determined, and so that when the selected position is reached, a signal activates a display element assigned to the respective actuated position selector and arranged in the index field (FIG. 3).

Abstract: The invention relates to a dental x-ray diagnostic installation comprising an applicator capable of introduction into the mouth of a patient on which is arranged an exit window from which x-radiation emitted by an anode can issue and expose a panoramic x-ray film applied externally of the patient's mouth. Associated with the installation is a holding system with which the x-ray film is supported in a defined position relative to the applicator and to the patient's mouth.

Abstract: Dihydroindoles of the formula ##SPC1##And their use as coupling or condensation components for the manufacture of basic indolenine dyestuffs of the formula ##SPC2##The dyestuffs are used for dyeing and printing natural are used for dyeing and printing natural and synthetic materials.

Abstract: Cationic dyestuffs and processes for their manufacture and their use for dyeing, printing and bulk dyeing of natural and synthetic materials, particularly of polyacrylonitrile and copolymers of acrylonitrile with other vinyl compounds, acid modified aromatic polyesters and acid modified polyamides.

Abstract: Cationic dyestuffs and processes for their manufacture and their use for dyeing, printing and bulk dyeing of natural and synthetic materials, particularly of polyacrylonitrile and copolymers of acrylonitrile with other vinyl compounds, acid modified aromatic polyesters and acid modified polyamides.