Abstract: Heat-curable adhesive in powder form and solvent-free, containing a mixture of solid phenolic resin with latent hardener in combination with an inorganic pigment mixture.

Abstract: An overload safety for clutches of the type having driven and drive elements arranged concentrically to each other and having a driver body which cooperates with a spring and is provided in the space between the elements. In order to obtain a small structural form which is simple to manufacture while of dependable operation, the disengaged position is obtained by the bending out of a resiliency section which crosses the space between the elements.

Abstract: The invention relates to a solvent-free hotmelt adhesive based on polyester polyurethanes which are suitable for the production of composite structures and, in particular, laminated parts for the interior finishing of motor vehicles. The hotmelt adhesive is based on polyester polyurethanes which are obtained by reacting organic polyester polyols and low molecular weight diols as chain-extending agents and which are modified by the incorporation of carboxyl and sulfonate groups. In addition to these modified polyester polyurethanes, the hotmelt adhesive may also contain unmodified polyester polyurethanes and crosslinking agents. The hotmelt adhesive is preferably in the form of a film or an in situ coating on a substrate. The hotmelt adhesive is produced by known processes of the type normally used for producing the known, unmodified polyester polyurethanes.

Abstract: A protective arrangement for a cassette tape recorder in which a magnetic head has a face side facing upwards, and is located within the recorder. A protective hood covers the face side of the magnetic head, and is rotatably located about a horizontal axis which is perpendicular to the gap plane of the magnetic head. A coiled spring engages the protective hood, and urges it into a closed position. A switch for connecting the recorder to a power supply line, is connected to the protective hood, by a connection located so that upon moving the switch to an ON position, the protective hood is moved to an open position against the action of the spring. When the switch is moved to an OFF position, the movement of the protective hood to its closed position is released. A stop located on the protective hood, enters behind the cassette placed in the recorder in the opening position of the protective hood.

Abstract: A magnetic tape recorder for recording as well as for playback of sound, having a noise suppression device, and sensor member with an abutment surface for engaging against an unopened break through tab of a tape cassette for causing a locking mode for the recording device to be inoperative. The sensor member has an additional abutment surface arranged such that the latter abutment surface senses the wall of the cassette outside of the broken-through penetration opening of the cassette and the insert movement of the sensor member is limited in the opened penetration opening. The sensor member is connected with the locking device; such that in the absence of the limitation due to the absence of a cassette, the locking device, is also inoperative.