Abstract: The guide rails for the circuit boards of a component carrier are provided with centering pins on their undersides and with a spring elastic holding clamp at one end as fastening element whose base is attached to the underside and whose holding tongue is bent in the direction toward the centering pin, with the distance of the front edge of the holding tongue from the centering pin being slightly greater than the distance of the front edge of the long holes of the module rails from the front edge of the longitudinal web of the module rails. At the other end of the guide rails a resilient clamping web projects as a second fastening element parallel to the centering pin. The free end of the clamping web is provided with a clamping shoulder oriented toward the centering pin for gripping around the front edge of the longitudinal web of the module rails.

Abstract: A component carrier for circuit boards equipped with electrical and electronic components and insertable on guide rails has two parallel side walls as well as four front and rear module rails which connect the side walls and support the guide rails. In order to prevent twisting of the module rails relative to the side walls and permit accurate assembly, the side walls are provided, for the fastening of the module rails, with groups of fastening elements in the form of holes and with pins that project toward the interior. Each one of these groups of fastening elements has four fixing pins that are disposed in the corners of a rectangle and form two pairs and each group additionally has an associated fastening hole. The profiles of the module rails here engage matingly into the space between each pair of fixing pins.

Abstract: The invention relates to a grounding element 1 for fastening to an aluminum component 11 and including a corrosion insensitive and wear resistant contact element 3 for the connection of a ground cable 13. In order not to adversely influence the visual impression of the aluminum component 11, the grounding element 1 includes a basic aluminum body 2 which can be welded to the aluminum component 11 and is connected mechanically and electrically with the contact element 3.

Abstract: The present invention relates to housings, particularly module carriers, equipped with supporting rails for the accommodation of a plurality of mutually parallel guide rails into which plug-in units equipped with electronic and electric components can be inserted. According to the invention, unoccupied plug-in locations are covered by individual covers whose width essentially corresponds to a multiple of the smallest scale unit and which can be combined in any desired number so that the air flow in the housing or in the module carrier is improved in a simple manner.

Abstract: The present invention relates to a mechanical and electrical connection between an extruded metal profile and a cast metal member. The cast member is provided with a peglike projection which is adapted to the interior configuration of the extruded profile and is insertable into the extruded profile. In order to realize a connection which is reliable even under mechanical stresses, which does not interfere with the subsequent lacquering and burn-in processes and which, moreover, is invisible, the invention provides that a spring of a hardness greater than both the extruded profile and the cast member is disposed between mutually facing faces of the extruded profile and the cast member. Barbs are shaped onto the cast member so as to engage in both components.

Abstract: To remove the heat generated in cabinets in which inserts carrying components in the form of electrical instruments are arranged one above the other, it is necessary to provide for cooling by use of convection or fans. This requires space between the inserts which takes up usable space in the cabinet. The novel insertable housing is intended to reduce the space required for ventilation and eliminate the need for the prior art fan inserts and metal guide sheets. In standard prior art systems, at least two height units were required for each ventilation measure. In the novel insertable housing, its jacket is only one height unit higher than the component carrier 1. An air intake shaft is provided within the jacket below the component carrier and above the component carrier is provided an air discharge shaft, with the air intake shaft being followed by a front air intake opening provided in a frontal frame and the air discharge shaft being followed by an air discharge opening in the rear wall of the housing.

Abstract: A connecting plug for providing lateral support for a circuit board in a plug-in unit intended to receive electrical and electronic components in industrial electronic devices, wherein the plug-in unit includes a front panel and circuit board fastened to the rear of the front panel and perpendicularly thereto by means of at least two holding blocks. The connecting plug includes a body provided on one side with at least one insertion groove for receiving a circuit board. A plug-in pin projects from the opposite side of the body and is shaped to provide a press seat with a blind recess provided in a rear face of a front panel of a plug-in unit to prevent the connecting plug from dropping off such front panel.

Abstract: A rack for accommodating industrial electronic components, with the rack including two side walls, two front connecting rails, and two rear connecting rails. The connecting rails are equipped or provided with fastening devices for enabling a fastening or mounting of printed circuit boards. In order to accommodate printed circuit boards of different sizes, the rack includes a front support rail interposed between one side wall and a support connecting the two front connecting rails to each other.