Abstract: The invention relates to an electrically conductive contact element (2) for an electric plug connector. The electrically conductive contact element (2) comprises a contact region (4) for making detachable electric contact with a mating contact element of a mating plug connector, and comprises a cable connecting region (6) for the connection of a cable. The contact element (2) comprises a cooling cavity (24), which opens into a distal opening (22) of the cable connecting region (6) which is arranged opposite the contact region (4).

Abstract: The invention relates to an electrically conductive contact element (2) for an electric plug connector. The electrically conductive contact element (2) comprises a contact region (4) for making detachable electric contact with a mating contact element of a mating plug connector, and comprises a cable connecting region (6) for the connection of a cable. The contact element (2) comprises a cooling cavity (24), which opens into a distal opening (22) of the cable connecting region (6) which is arranged opposite the contact region (4).

Abstract: It is well known that induction regulators are used in transmitting signals in head drum structures in video devices or equipment for digital recording and playback of signals. Since each head on the head wheel requires its own induction regulator, or transformer for short, there can be a relatively large number of transformers. This plus the fact that head drum units are becoming increasing smaller, and transmission frequencies increasingly higher, leads to very high demands for precision on the part of the transformer. This applies both to the ferrite rings and to the coils of the transformer. A device is proposed with which coils can be produced with high precision in the inner groove of the ferrite ring.

Abstract: A dual or twin projector arranged to take picture slides from a single magazine located between the two projectors, and to return the slides to the same magazine after projection, in proper order ready for another projection operation. The planes of the picture gates of the two projectors are slightly staggered or offset from each other in the direction of the optical axis, preferably by a distance equal to the spacing of the slides in the magazine, so that, for certain types of operation, one slide may be fed from the magazine to one projector simultaneously with the feeding of the next slide from the magazine to the other projector.

Abstract: A picture slide projector having provision for automatic focusing (i.e., provision for automatically keeping the projection lens and the picture slide at a constant distance from each other notwithstanding a buckling displacement of the slide under the influence of heat) is provided with means for moving the projection lens axially relative to the picture slide, to an out-of-focus position to produce a fading or dissolving effect on the viewing screen, while the slide is being withdrawn from the slide holder or gate and replaced by another slide. At the same time, the automatic focusing mechanism is rendered inoperative. Preferably also at the same time, the projection lamp is dimmed. When the slide changing operation is completed, the automatic focusing mechanism is rendered operative, and it serves to bring the projection lens back axially to the sharp focus position, the projection lamp being simultaneously brightened.