Fishing – trapping – and vermin destroying – Traps – Impaling or smiting
Reexamination Certificate
1999-12-20
2001-03-27
Paumen, Gary F. (Department: 2833)
Fishing, trapping, and vermin destroying
Traps
Impaling or smiting
Reexamination Certificate
active
06205700
ABSTRACT:
BACKGROUND OF THE INVENTION
1) Field of the Invention
The field of this invention relates to electrical connectors and more particularly to an electrical connector between a daughter card circuit board and a back plane printed circuit board.
2) Description of the Prior Art
In the assembling of electronic computing equipment, it is exceedingly common to utilize a printed circuit board known as a back plane. Mounted on the back plane are a plurality of metallic male electrical connectors with each male electrical connector having a grouping of a plurality of parallel protruding electrical connecting pins. Each male electrical connector is to plug into a female electrical connector which is mounted on a daughter card. When the female electrical connector connects with the male electrical connector, the daughter card assumes a substantially perpendicular position relative to the back plane. It is to be understood that there is a separate daughter card connected to each male electrical connector.
These male electrical connector pins are quite thin in cross-section and are generally no more than a half to threequarters of an inch in length. These pins can be relatively easily bent. Each pin is to connect with a separate pin receiving hole formed in the female electrical connector of the daughter card. If a bent pin does not engage with its proper hole, not only will the computer equipment not function properly but also may be subject to encountering an electrical short which can destroy both the daughter card and back plane and may even start a fire.
In the past, daughter cards and back planes have been constructed in a manner to try to facilitate only the correct connection between the female electrical connector and the male electrical connector. This construction has been to mount a guide post on the back plane directly adjacent the male electrical connector. Mounted in conjunction with the male electrical connector is a module with this module having an internal cavity within which is to be mounted in a matingly connected manner the female electrical connector of the daughter card. The daughter card also includes a slot with this slot to receive the guide post. Therefore, it is the intention, when the guide post is aligned with the slot, to have the female electrical connector be aligned with the internal cavity of the module with precise alignment to be achieved between the female electrical connector and the male electrical connector as connection occurs. However, it has been discovered misalignments can occur which can result in one or more of bent pins of the male electrical connector. It would be desirable to construct a connecting arrangement between the male electrical connector and the female electrical connector that insures that only the precise connection can result between the female electrical connector and the male electrical connector.
SUMMARY OF THE INVENTION
A back plane has a male electrical connector which comprises a grouping of a plurality of parallel protruding electrical connecting pins. A daughter card has mounted at its edge a female electrical connector with this female electrical connector having a separate receiving hole for each pin. A daughter card alignment module, which has a channel shape, has a separate hole for each male pin. This module is to be mounted on the male connector and is snugly retained thereby. This module, at one end, is closed by a guide post at one end and at the opposite end is closed by an end wall thereby completely enclosing the internal cavity of the module. Associated with both the guide post and end wall is a slot with each of these slots to only connect with the edge of the daughter board. When the edge of the daughter board is so connected with the slots, it is known to the installer that the precise interconnecting arrangement between the daughter board and the back plane is now established. The guide post also connects with a recess formed in the daughter board further insuring the precise alignment between the daughter board and the back plane. Both the guide post and end wall include slanted deflecting surfaces that direct the female electrical connector into the precise position within the internal cavity of the module during insertion of the female electrical connector within the internal cavity. Therefore, by the time each of the holes of the female electrical connector begin to engage with the pins, each pin is precisely aligned with its respective hole thereby eliminating the possibility of any misalignment and the producing of any bent pins.
The primary objective of the present invention is to construct an electrical connector between a daughter card and a back plane which directly longitudinally and transversely positions the female electrical connector of the daughter card with the male electrical connector of the back plane.
Another objective of the present invention is to construct a daughter card alignment module which includes deflecting surfaces at each longitudinal end of the module that function to initially direct the female electrical connector into the correct mating position with the internal cavity of the module prior to engagement of the male pins of the back plane electrical connector with the female electrical connector.
Another objective of the present invention is to construct a daughter card alignment module which integrates with a guide post which was separate in the prior art to establish the initial connecting arrangement between the daughter card and the back plane. This integration of the guide post eliminates the attachment of a separate part to the back plane thereby reducing cost of assembly of the back plane thereby increasing productivity with improved quality.
REFERENCES:
patent: 3864000 (1975-02-01), Coller et al.
patent: 4571014 (1986-02-01), Robin et al.
patent: 5445527 (1995-08-01), Martin
Blaise Scott S.
Rigby William J.
Component Equipment Company, Inc.
Munro Jack C.
Nguyen Phuongchi
Paumen Gary F.
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