Abstract: The invention concerns a guide rail for printed circuit boards in industrial electronic equipment, which guide rail has, at one of its ends, an attachment means 1 for a spring contact strip 5 provided with electrical connections. This attachment means 1 consists of a retaining limb 2, which is applied at right angles at the end of the guide rail and carries a holding lug 4, and of an angled resilient tongue 3 extending towards this holding lug 4.

Abstract: A plug-in module intended for insertion into component carrier for electronic devices. The module is composed of: a circuit board for supporting electronic and electrical components; a face plate having two longitudinal edges which are fastened at a right angle to the circuit board by means of a bracket; and an extractor including a gripping member which projects from the face plate and has two projecting parallel side walls having bearing holes therein for receiving coaxial hinge pins located in the plane of the face plate so that the extractor is pivotal on the coaxial hinge pins. The longitudinal edges of the face plate have two oppositely disposed recesses for engaging the side walls of the extractor so that the hinge pins are seated in the recesses. The side walls of the extractor may be an integral part of the extractor or separate pieces which are attached to the extractor.

Abstract: A plug assembly having a printed circuit board, a face plate and two printed circuit board holders, for introduction into a frame-like structural assembly including bearing rails. The printed circuit board holders being provided with a clamping stand for the printed circuit board, a receiver slot for receiving a face plate, and a flange for attachment to a bearing rail. The improvement being that each printed circuit board holder has a face plate attachment mechanism, at least one rib disposed in the receiver slot and a wall disposed adjacent the receiver slot which contains an opening. The face plate attachment mechanism being disposed in the opening and passing through the receiver slot. The face plate has at least one projection insertable in the receiver slot of one holder.

Abstract: A multi-layer circuit board which includes at least two boards carrying conductors and a shielding foil interposed between the two boards. The circuit board is provided with a through hole including a metallic lining in electrical connection with the shielding foil. The lining includes an insulating layer on which a conductive metal layer is disposed. The metal layer, electrically separated from the lining by the insulating layer, is in electrical connection at respective ends thereof with the conductors. By virtue of this arrangement a coaxial design of a through hole results thereby permitting a total decoupling with respect to adjacent or neighboring through hole connections.