Abstract: A method and a circuit arrangement for combining several data channels with a transmission channel in which the carrier signal has at least two digital data signals, each with a different frequency, superimposed on it in terms of time. The superimposed signal is transmitted and received by a receiving device. The receiving device decodes the digital data signals and can pass them on, separately, to corresponding devices for further processing. The method and circuit arrangement may be advantageously used for data transmission between a motor vehicle and a fixed beacon. The data to be transmitted may contain traffic guidance data, or data for billing road use fees, for example.

Abstract: A cooling system is provided for cooling food in an aircraft while the food is stored in known catering trolleys that are stowed at prescribed stowage locations, preferably for example at least one on-board galley (3A to 3E) within the aircraft cabin. The cooling system includes at least one central cooling plant (4) located below the cabin floor of the aircraft. Heat exchanger units (9A, 9B, 17A, 17B) are provided in the galleys (3A to 3E). A distribution conduit system, including a supply conduit (5) and a return conduit (6) as well as connector conduits (10A, 10B, 11A, 11B), couples the central cooling plant (4) with the respective heat exchangers (9A, 9B, 17A, 17B) arranged in the galleys (3A to 3E). Connector adapters are provided at various locations along the supply conduit (5) and the return conduit (6), and the connector conduits (10A, 10B, 11A, 11B) include quick connectors that are connectable to the adapters.

Abstract: Fiber-reinforced materials are produced by a process in which a heat-stable thermoplastic aromatic polyether A containing reactive groups, preferably nitrile groups and/or sulfur bridges and/or arylthio or alkylthio groups, if required together with a heat-stable thermoplastic polymer B which does not contain any reactive groups, is applied onto reinforcing fibers, the resulting semi-finished product is shaped, and the plastic matrix in the molding obtained is crosslinked so that there is virturally no increase in its glass transition temperature although the amount of soluble material is decreased to less than 60%, determined by extraction in boiling dichloromethane for one hour.

Abstract: A continuous process for the preparation of fiber composite materials by impregnating fiber reinforcing material with a solution of a thermoplastic or thermosetting plastic precursor, followed by evaporating the solvent used by means of exposure to light having a wave length corresponding to the absorption maximum of the solvent.

Abstract: Fiber-reinforced materials are produced by a process in which a heat-stable thermoplastic aromatic polyether A which contains reactive groups, preferably nitrile groups and/or sulfur bridges and/or arylthio or alkylthio groups, if necessary together with a heat-stable thermoplastic polymer B which does not contain any reactive groups, is applied onto reinforcing fibers, the resulting semi-finished product is molded and, in the molding obtained, the plastic matrix is crosslinked so that the glass transition temperature increases and it becomes virtually insoluble.

Abstract: Thermoplastic molding materials containing a mixture ofA. a heat-stable polymer, e.g. a polyether sulfone or polysulfone, which does not contain any reactive groups, andB. a heat-stable polymer which contains reactive groups, preferably nitrile or thioaryl groups and/or sulfur bridges,can be processed to moldings, which can be crosslinked, for example by being heated at above 200.degree. C., so that the plastic matrix becomes virtually insoluble.