摘要:
A compact arrangement for multipole, surge-protected surge arresters, including internally wired, encapsulated series gaps arranged essentially in parallel in a housing. The series gaps have opposite-lying, projecting contact surfaces connected to outer terminals and inner contact bars or bridges. An electronic control or trigger circuit is located on a wiring support. The housing includes dividing walls and has a trough shape, the resulting housing chambers accommodating the gaps and terminals. An insulating plate with openings into which spring contact elements are introduced is provided on the housing trough which opens upwards. Located above the insulating plate is the wiring. The spring contact elements create the electrical connection between contact points on the underside of the wiring support and the cover of one of the series gaps, respectively. Further, an encapsulated surge protector includes a series gap arrangement with two metallic main electrodes lying coaxially to each other and at least partially overlapping each other and having connections in opposite directions. The main electrodes form an arc chamber in conjunction with at least one insulation part. At least one of the main electrodes has an inner expansion chamber and a trigger electrode extending preferably radially or axially rotationally symmetrically is provided at least in the area of an outer insulation part.
摘要:
A positioning and navigation system for land vehicles features a simple and memory-conserving route entry method. Routes on maps can be specified by the junctions traversed by the route, so that entering only the junctions in memory uses much less space than prior art digital route storage systems which stored the coordinates of each point along the route. A trip progress information display shows the route vividly by using color or brightness contrast with the rest of the map. Additional direction of travel indications can be given, for example on a Head Up Display reflected off the inside of the windshield within the operator's field of view or by acoustic signals or speech-synthesized announcements. This results in particularly easy-to-follow guide to the driver or operator. Head-up displays on motor vehicles often have double images and interfering reflections on the windshield. To avoid these, arrangements of linear polarization filters or shutter foils are suggested, which have particularly high light transmission. Arrangements of filter plates on a combiner inside of the windshield are also advantageous.