Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2000-08-28
2002-06-25
Gandhi, Jayprakash N. (Department: 2841)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S752000, C361S759000, C361S801000, C174S051000, C439S108000
Reexamination Certificate
active
06411521
ABSTRACT:
TECHNICAL FIELD
This invention relates generally to mounting printed circuit boards in printed circuit carriers and relates specifically to the securing and grounding of the printed circuit boards in the printed circuit carrier.
BACKGROUND OF THE INVENTION
Within telecommunication switching systems and other systems, it is known to mount printed circuit boards in printed circuit carriers to interconnect the printed circuit boards for the communication of signals and supply power to the printed circuit boards. Within the prior art, the printed circuit boards are secured into the carriers by latches mounted on each individual printed circuit board. When the latch is in the locked position, the printed circuit board is physically secured and grounded to the printed circuit board cabinet. It is necessary to ground the printed circuit boards to the carrier so as to prevent electrical static discharges between the carrier and the printed circuit board. The latches on the printed circuit boards function well for their intended purpose; however, the cost of manufacturing the latches and assembling the latches onto the printed circuit board is high. In addition, the latches on occasion break, and the printed circuit board must be sent back for repair of the broken latch.
SUMMARY OF THE INVENTION
The proceeding problem is solved and a technical advance is achieved by an apparatus that allows printed circuit boards to be secured in a printed circuit carrier by means of a retaining bar that is secured at its ends to the printed circuit board carrier. Contact is established between the retaining bar and each individual printed circuit board by depositing a copper area on the back face of the printed circuit board and making contact with this area by the retaining bar. Advantageously, the conductive area is connected to the ground of the printed circuit board, and the retaining bar is conductive in nature and makes contact at either end with the printed circuit board carrier. Advantageously, the retaining bar is designed to provide vertical strength throughout its length.
These and other features and advantages of the invention will become more apparent from the following description of an illustrative embodiment of the invention considered together with the drawing.
REFERENCES:
patent: 4503484 (1985-03-01), Moxon
patent: 4964810 (1990-10-01), Malotke et al.
patent: 5390083 (1995-02-01), Decker et al.
patent: 5477420 (1995-12-01), Brooks
patent: 5698821 (1997-12-01), Herman
patent: 5708552 (1998-01-01), Han et al.
patent: 5822193 (1998-10-01), Summers et al.
Avaya Inc.
Gandhi Jayprakash N.
Moran John C.
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