Siemens Aktiengesellschaft

Leo Pelzl

Karl Zell

Peter Seidel

Heinz J Niggl

Kurt Glomb

Juergen Seibold

A coding device for printed circuit cards which are insertable into a printed circuit card rack wherein coding elements 3 are provided at the front upper and lower horizontally mounted subracks of a printed circuit card rack between the guide rails 2 and the coding elements comprise slots 4 which extend parallel to the guide rails 2. Webs 7 and 8 corresponding to the slots 4 are applied to the upper and lower end faces of the plug connection connector 5 as cooperating coding elements so as to provide that coding occurs as soon as the individual printed circuit cards are introduced into the rack.

Coding device for printed circuit cards which can be inserted into a

A device for shielding assemblies having multi-pole plugs. Shielding caps of multi-pole plugs having spring elements that, in the plugged-in condition of the plugs, press against contact elements oriented perpendicularly on a wiring board and connected to a grounded potential layer thereof. Metallic shielding surfaces that at least partially surround the assemblies are voltaically connected to the shielding caps with metallic connecting elements, preferably spring elements.

Device for shielding assemblies having multi-pole plugs

A centering strip for plugging onto a backplane printed circuit board provided with contact blades accepts plugs in a housing opening and accepts contact blades through openings in a floor of the centering strip. In order to guarantee that the individual cable plugs are correctly plugged into the proper location on the centering strip and that the centering strip is not damaged when the plug is inserted into the housing opening, the centering strip is divided into a plurality of segments by transversely oriented partitions. The partitions have two sides on an upper half portion which forms a mechanical coding devices for the plugs to be accepted. The lower half of the partitions are provided with cavities for acceptance of contact blades. The depth of the cavities is dimensioned such that the centering strip is supported on the contact blades by a solid middle part located between the upper and lower half portions of the partitions.

Centering strip for use with a backplane printed circuit board

Spring elements are located at shielding caps of printed circuit board or cable connections such that they resiliently press against contact elements in the plugged condition, the contact elements being electrically connected to the ground potential layer of a mother board. Contact blades or reinforcing plates extending perpendicularly to the mother board serve as the contact elements. The spring elements, depending upon the position of the contact elements or the shape of the shielding caps are located at the insides or outsides of the shielding caps or are fashioned at the edges thereof which are directed towards the mother board.

Mechanism for connecting shielding caps of multi-pole plugs to the

The retention of a contact blade of a backplane printed circuit board in a centering strip ensues by means of a resilient web in the floor of the centering strip engagable by a calotte-like pock on the contact blade, thus providing definable retaining forces.

Backplane wiring for electrical assemblies

A centering module member combined with a contact spring element, pre-mounted thereon by means of a simple plug-in connection that, when the centering module is fastened to a grounded shielding plate, the plate is directly contacted by the contact spring element. At the same time, the part of the contact spring element engaging through a corresponding recess into an interior space of the centering module member presses resiliently against a metallic housing of a plugged-in cable plug. The contact spring element forms a frame composed of webs, whereby spring tongues engaging into the interior space are attached to at least two webs lying opposite one another.

Centering module for guidance and acceptance of a cable plug with

The housing of the cable plug is exclusively formed of a one-piece metal part bent U-shaped which presses against the unit equipped with the contact spring elements under spring tension. In order for a shielding elimination to ensue on a short, direct path to a grounded potential carrier, the legs of the metal part nearly surround the unit or they even extend beyond it. In such a case, they are executed as resilient tongues with which an electrical connection to the grounded potential carrier directly ensues. Catch elements are provided for an interlocking connection of the metal part to the unit containing the spring clips or the blade strips. The web surface of the metal part proceeds at a slant relative to the bottom edges of its legs. In order to enable an oblique exit of the cable both toward the top and bottom, as well as toward the right and left, the said unit can also be engaged side-inverted without loss of positioning.

Cable plug

Centering strips, pluggable onto the contact blades of a wiring backpanel for receiving cable plugs, are provided with fastening disks in the region of openings in the floor of the centering strips through which the contact blades project into the centering strip, the fastening disk likewise including openings for plugging the contact blades therethrough. After the centering strip has been plugged, the fastening disks are located such that their inner edges of their openings cut into the contact blades and their outer edges cut into the floor of the centering strip. A positive fixing between contact blade, fastening disk and centering strip is thereby achieved.

Method for fastening centering strips

The coder device prevents plugs being assembled to a counter-plug device having a different coding. The coder device is formed by tongue-like projections on a plug and by corresponding chamber-like recesses on the counter-plug device. The projections are provided with a theoretical breakage point and can be broken off. The broken off projections can be inserted into the associated recess of the housing of the counter-plug device. By breaking off projections in different combinations, it is possible to individualize the original universal coder device.

Electric plug connection with a coder device

A shielding device lying approximately flush against the side walls of a centering strip is formed by at least one shielding element and comprises spring elements which press resiliently against the shielding of a plug in the plugged condition of this plug. The shielding is connected to the grounded potential layer of a subrack with screws, being connected thereto via fastening tabs arranged at the shielding elements.

Multi-pole plug mechanism comprising a centering strip with a shielding

During plugging of a plug, plug strips of the plug partially immerse into passages of a centering strip. A metallic, electrically conductive layer is applied to the lateral faces of these passages and the shielding of the plug is provided such with spring elements that the latter press resiliently against the metallic layer in the plugged condition of the plug. Means are also provided which electrically connect to metallic layer of the individual passages to one another and to the grounded potential layer of a subrack.

Device connecting the shielding of plugs to a subrack ground

The invention relates to an electrical plug connector strip provided with a plurality of rows of contact elements that are connected by means of terminal elements to a printed circuit board of an electrical assembly, whereby the sections of the terminal elements projecting from receptacle chambers for the contact elements are bent toward the printed circuit board. In order to obtain a simple, firm connection between the electrical plug connector strip and the printed circuit board, the back side of the plug connector strip contains a plurality of flanges having downwardly directed insertion posts. Preferably two posts are provided, one larger in diameter and length than the other. A groove is provided around each post on the underside of the flange to receive chips of the post which are cut off during the insertion process. A pinch rib may be provided on the connector strip to engage the circuit board and provide a tight fit.

Electrical plug connector strip

The invention relates to a centering strip for plugging onto a backplane printed circuit board provided with contact blades, whereby the centering strip serving for the acceptance of spring clips has a rectangular housing open at one side. For easy pulling of centering strips plugged to a backplane printed circuit board directly next to one another, cutouts into which parts of a pulling tool can engage proceeding from the inside are provided in the side walls of two of the centering strips.

Centering strip for plugging to a backplane printed circuit board

An electric assembly is provided with a multi-row plug strip which is connected to a carrier plate arranged in the extension zone of a central row of contacts. The connector elements of the outer row of contact elements are bent into the region of the next row, around the end of the circuit board, and are inserted into bores of the circuit board from the same side as the connector elements of the other rows. The two outer rows of receiving chambers which are adjacent to the circuit board are equipped with contact elements in alternation and offset relative to one another. By means of the invention the circuit board is displaced inwards away from the spacing boundary. The plug forces are thus transferred to the circuit board in a less one-sided fashion.

Growing community of inventors

Holzkirchen, Germany

Leo Pelzl