Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – For receiving coaxial connector
Reexamination Certificate
2000-05-17
2001-05-29
Sircus, Brian (Department: 2839)
Electrical connectors
Preformed panel circuit arrangement, e.g., pcb, icm, dip,...
For receiving coaxial connector
C439S581000
Reexamination Certificate
active
06238218
ABSTRACT:
The present invention relates to a device for electrically connecting a coaxial line to a printed circuit card.
BACKGROUND OF THE INVENTION
Various solutions have already been devised and proposed for connecting a coaxial cable to a printed circuit card.
The simplest solution consists in soldering the ground conductor and the central conductor of the cable directly to corresponding tracks on the card. Nevertheless, that method is suitable for circuits that operate at low frequency only because of the poor impedance matching that results from the soldering. It also does not enable the cable to be disconnected.
Connectors have also been proposed that comprise two elements, one of which is fixed to the card and the other of which is mounted on the end of the coaxial cable. Such connectors present all of the advantages of a releasable connection, and they generally provide good impedance matching for the line.
However they are relatively complex and expensive to manufacture and they occupy considerable volume on the card, and that is not always compatible with miniaturizing the card.
OBJECTS AND SUMMARY OF THE INVENTION
The invention seeks to provide a device which is simple and of low cost but enables a coaxial line to be connected directly to a printed circuit card, the device also being very small in volume.
The present invention provides a device for electrically connecting a coaxial line to a printed circuit card having at least two conductor tracks each extending to the edge of said card, the device comprising an outer contact and a center contact housed inside the outer contact, wherein the outer contact has a substantially tubular connection portion for connection to the card, said connection portion having two diametrically-opposite slots subdividing it into two jaws arranged to pinch between them said card inserted via its edge between said jaws, and wherein the center contact comprises a clip-forming connection portion for connection to the card, with the edge of the card engaging therein when the card is inserted between the two jaws of the outer contact.
The device of the invention turns out to be particularly simple and of low cost to manufacture and to install since it is made up of only one element which is mounted directly on the card.
To use the device of the invention, it suffices to organize the tracks for connection at the edge of the card by spacing them so that they come into register with the bearing zones of the contacts of the device.
It is not necessary for all of these bearing zones of the contacts, which are the ends whereby said contacts pinch the card, to make an electrical connection between the contact concerned and a track of the card, some of them need only perform the mechanical function of pinching the card.
By means of the invention, the coaxial structure of the electric line is conserved all the way to the tracks on the card, thereby providing better impedance matching with the line.
With respect to the card, the device of the invention also presents the advantage whereby no special preparation is required for the card other than arranging the conductor tracks at the edge of the card, i.e. there is no need for any cutting, metallization, or drilling.
In a particular embodiment of the invention, the outer contact of the device is made on a lathe.
In another embodiment, the outer contact is made by cutting and rolling a metal sheet.
In a particular embodiment, the center contact is made by cutting, rolling, and/or folding a metal sheet.
In a particular embodiment, the device is arranged to be mounted on a panel adjacent to the printed circuit card, in such a manner that said panel supports the device and releases its connection portion mounted on the edge of the card from the mechanical stresses that result from the presence of a coaxial cable.
REFERENCES:
patent: 3426311 (1969-02-01), Gifford
patent: 3539966 (1970-11-01), Logan
patent: 4737111 (1988-04-01), Minar et al.
patent: 5405267 (1995-04-01), Koegel et al.
patent: 6065976 (2000-05-01), Wang
patent: 86 16 081 (1991-08-01), None
patent: 197 53 839 (1999-04-01), None
patent: 0 915 536 (1999-05-01), None
Radiall
Schweitzer Cornman Gross & Bondell LLP
Sircus Brian
Webb Brian S.
LandOfFree
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