Supports: cabinet structure – For particular electrical device or component – Housing for computer or computer related equipment
Reexamination Certificate
1999-10-13
2001-05-29
Wilkens, Janet M. (Department: 3636)
Supports: cabinet structure
For particular electrical device or component
Housing for computer or computer related equipment
C312S257100
Reexamination Certificate
active
06238025
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention refers to an assembly carrier for plug-in circuit boards with two front supporting rails and two side panels, as well as a cover plate and a base plate, whereby each supporting rail possesses a roof for removing and inserting assistance of the plug-in circuit boards and a row of holes are indicated on the roof.
The invention finds application with assembly carriers, which are needed with identical structure and in large numbers.
For a long time, assembly carriers have been known to have a modular structure for the installation of plug-in circuit boards equipped with electronic elements. Between two side panels, supporting rails are attached in the front and back as well as above and below, whereby a simple framework is formed. The supporting rails also known as assembly rails, serve for the attachment of guide rails for the plug-in circuit boards, for the attachment of the standardized front plates of the plug-in circuit boards, for back wiring boards, and for connector plugs. The openings between the supporting rails are closed if necessary by cover plates and base plates as well as with back walls, whereby with HF shielded assembly carriers the unwanted assembly slots with resilient contact strips are armored. Such a structure made from different materials, from extruded aluminum sectional rails and punched aluminum plates is flexible, yet in addition, cost-intensive. Also, the number of the individual parts used with their many junction points becomes unfavorably apparent in HF shielded applications.
In the utility model DE 298 06 897 U1, the application reveals an assembly carrier, where the floor plate and cover plate are made of corrosion proof steel sheet. At their front edges angled tabs of steel sheet are arranged, the front edges as well as the angled tabs form the front supporting rails. This base, cover, and assembly rail integrated building method is low-priced to produce, however sometimes it leaves something to be desired regarding the form of the manufactured supporting rails.
It is the task of the invention to form an assembly carrier with integrated supporting rails in such a way, that all of these requirements are addressed in the profile of the supporting rail and that it is rational to manufacture.
SUMMARY OF THE INVENTION
For the solution of the proposed task, an assembly carrier of the initially mentioned design is used, and then it is proceeded by solving the task through the fact that, for the creation of the two front supporting rails, the roof is formed by the front edges of the cover plate and base plate and there is fastened on this in each case a sectional rail from extruded aluminum.
The suggested assembly carrier can be rationally produced and the construction of its supporting rails can be achieved through a tight connection of its cover and base made of steel sheet with a sectional rail of aluminum. The result is an assembly carrier that can correspond to all standards and conditions.
In its simplest version, the cover and base are integrated with the sectional rail and are formed and fastened in each case to the front area of the plates, the supporting rail is aligned with the cover plate or the base plate.
It is advantageous however, if behind the sectional rail, the cover plate and base plate are bent twice in the opposite direction at right-angles and forms a stem between the two bent sections. This bent section allows the formation of a supporting rail in form of a standard assembly rail.
In the simplest case the sectional rail is attached at the cover plate or base plate at least through an electrically conductive adhesive fastener.
The sectional rail can also be fastened at the cover plate or base plate by means of screws.
In accordance with a further type of mounting, a set of projecting prongs which bear rivet heads are formed at an outer wall of the sectional rail and are pushed through a corresponding row of holes at the roof.
For the improvement of the transmission of forces between the roof and sectional rail, for positioning and to avoid lateral turn out of the sectional rail, the roof bears on its top side a set of projecting cogs, which intervene in a holding groove at the outer wall of the sectional rail.
In a preferred embodiment of the invention, regarding the attachment of the sectional tabs to the roofs of such cover and base plates, which are bent twice at right-angles, the sectional rail indicates a narrow longitudinal groove and both the cover plate and the base plate carry, at their upper forming edge, a number of tangs punched out of the stem. The sectional rails rest under pressure against the tangs facing the areas of the outside longitudinal groove wall. Hereby the area is transformed with a caulking of the longitudinal groove's wall. The gap between the longitudinal groove wall and the stem will be closed by material displacement on the stem. The longitudinal groove wall can be shifted under the tangs by a skillful bending of the material. This type of mounting produces, at the same time, in connection with the cogs on the roof and the holding groove of the sectional rail, an unusually rigid and electrically conductive connection and ensures a level resting of the sectional rails upon on the roof.
It is an advantage worth noting that the invention includes, that the one unshaped cross section indicated sectional rail is designed as a standard assembly rail and for this reason is equipped with contact surfaces as well as a deep channel, on whose opposing walls lie holding grooves for the accommodation of retaining means and positioning elements for the plug-in circuit boards.
The production and assembly of the conceptualized assembly carrier are simplified substantially, if the cover plate and base plate indicate attachment borders, bent up along their long sides, to which the side panels are appropriately attached.
For the formation of the back, upper, and lower supporting rails of the assembly carrier, bent sections can be formed in a cost-saving way at the back edge of both the cover plate and base plate.
REFERENCES:
patent: 3098177 (1963-07-01), Bleier
patent: 3347608 (1967-10-01), Ritchie
patent: 4429937 (1984-02-01), Stockmaster
patent: 5154300 (1992-10-01), Joist
patent: 5504656 (1996-04-01), Joist
patent: 5735411 (1998-04-01), Flamme et al.
patent: 94 02 714 (1994-04-01), None
patent: 196 44 420 (1997-08-01), None
patent: 298 06 897 U (1998-08-01), None
Haag Volker
Joist Michael
Kern Klaus
Merchant & Gould P.C.
Schroff GmbH
Wilkens Janet M.
LandOfFree
Assembly carrier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Assembly carrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Assembly carrier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2529859