Abstract: In a mold for producing injection molded parts, the supply conduits for supplying molten material to the mold cavity are heated by various heating devices. Temperature measuring devices are provided for determining the temperature at predetermined locations within the melt flow. For the purpose of controlling the various heating devices depending on the predetermined temperatures at the individual measuring points, there is removably fixed to the mold at least one regulating member which is electrically connected via an electrical connector socket with electrical conduits installed within the interior of the mold. The electrical conduits installed within the interior of the mold are lead to the various heating and temperature measuring devices. The regulating member can be connected via an external conduit with a data supply and indicator member. The regulating member as well as the data supply and indicator member are preferably equipped to store several programs.

Abstract: A sound-permeable loudspeaker cover including a frame in which are arranged mutually crossing webs of a synthetic plastic material delimiting sound passage openings. A sound-permeable material, for instance a fleece, a textile fabric or a knitting, covers the sound passage openings, and is arranged approximately in the middle of the webs. The webs are produced as a single part according to the injection molding process, and penetrate the sound-permeable material to anchor it at a plurality of individual locations.

Abstract: A loud-speaker is combined with a device for producing lighting speakers is covered by two discs provided with openings and, for example, being formed of a grating. The inner disc of the discs, which is facing the speaker cone is rotatable, whereas the outer disc is stationary. Rotation of the rotatable disc is driven either via a motor or via driver members fixed to the speaker cone of the loud-speaker which are actuated by transmission of the vibrations of the speaker cone to the rotating disc in order to provide rotating movement. Light sources for illuminating the surface of the inner or, respectively, outer disc, which is facing the light sources, are provided either within the speaker cone or outside of the loud-speaker. The lighting effects are then generated by the rotation of the inner disc.