Abstract:
Disclosed is an electrical connector assembly wherein an electrical signal transformer is mounted to or within the electrical connector assembly. The electrical connector assembly is mounted to a printed circuit board utilized in a telecommunication network digital cross-connect module. The electrical connector assembly is preferably a BNC, a TNC type or a 1.6/5.6 of electrical connector.

Description:
TECHNICAL FIELD 
     This invention pertains to a telecommunications cross-connect assembly which utilizes a combined electrical connector and transformer, the preferred electrical connectors being a BNC type connector, a TNC type connector or a 1.6/5.6 type connector. The transformer is mounted to or within the electrical connector housing, and the combination provides one set of contacts which is electrically connected to a circuit board. 
     BACKGROUND OF THE INVENTION 
     Numerous types of electrical connectors have been used for many years to provide an attachable and detachable electrical connection between electrical devices. A common type of electrical connector is a Bayonet Neil-Concelman (“BNC”) connector, which was developed many years ago. The BNC electrical connector is very common in the telecommunications industries for connecting cables having two conductors therein; i.e., coaxial cables, for various applications. There is a similar electrical connector, referred to as a Threaded Neil-Concelman (“TNC”) connector, which is very similar to the BNC, with the main difference being that there are threads in the TNC instead of the bayonet feature. There is at least a third well-known connector with which this invention may be applied, and that is a 1.6/5.6 connector. 
     A typical BNC connector includes a male connector assembly and a female connector assembly which are designed and adapted to be engaged and disengaged with one another. These connectors are typically referred to as two conductor connectors: the first conductor being a center conductor which would electrically connect or mate with a female receptacle; and the second conductor being a center terminal which would electrically connect or mate with a corresponding sleeve, as described in U.S. Pat. No. 5,857,866, which is incorporated herein by reference. Oftentimes but not necessarily, the second conductor (which is typically the center terminal and sleeve), is a ground. 
     The sleeve of the female connector assembly surrounds the female receptacle and includes a pair of diametrically opposed engagement pins which extend radially outward from the sleeve. The male connector assembly includes a male BNC center terminal having a center conductor. The male connector assembly also includes a locking collar having a pair of slots that are adapted to engage the engagement pins on the sleeve of the female connector to lock the connectors together. 
     The female and male connectors can be connected and locked together by first engaging the male BNC center terminal with the sleeve and then rotating the locking collar to the locked position. This coupling action is a twist-lock feature of the BNC connector and allows a reliable electrical connection to be made without the danger of the connection later being accidentally or gradually lost. 
     As is known in the industry, in the TNC connector, the external threads on the male connector component mate with the internal threads in the female connector component, and replace the twist-lock feature of the BNC. 
     In the telecommunications industry there are many different applications for BNC connectors. A common application relative to this invention is the use of the BNC electrical connector as used in a digital cross-connect module. One example of such a module is that disclosed in U.S. Pat. No. 4,975,087 dated Dec. 4, 1990, which is hereby incorporated by reference into this specification. 
     There are different options for connections on the rearward side of a cross-connect module, and the option relevant to this invention is the use of BNC coaxial connectors to attach cross-connect modules and cross connect panels (to which cross connect jack assemblies are attached) to other equipment. 
     An electrical signal passing through a BNC electrical connector on the rearward side of a cross-connect module will typically need to be transformed by passing through a transformer. In order to transform the electrical signal and utilize BNC electrical connectors, a transformer is typically mounted on a printed circuit board and is between the BNC connector and the switch assemblies in the cross-connect module. The circuit board will typically include multiple transformers, one for each of the multiple BNC connectors, as illustrated in FIGS. 4A &amp; 4B. 
     The process of individually mounting each transformer and each BNC connector to the printed circuit board separately is more laborious, time consuming and expensive than is necessary. 
     This invention substantially reduces the assembly time and reliability by providing a BNC connector which includes a transformer mounted to or within the BNC connector housing. The combined assembly can then be mounted on a circuit board with one set of contacts being electrically connected to the circuit board, improving reliability and saving time and money. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Preferred embodiments of the invention are described below with reference to the following accompanying drawings. 
     FIG. 1 is a side view of a DSX-1 cross-connect telecommunications jack assembly; 
     FIG. 2 is a front view of a DSX-1 cross-connect telecommunications jack assemblies held side by side in a module; 
     FIG. 3 is an exemplary electrical schematic representation of a jack assembly; 
     FIG. 4A is a rear view of a prior art circuit board configuration with traditional BNC type electrical connectors mounted thereon; 
     FIG. 4B is a front view of circuit board with multiple transformers mounted thereon and electrically connected to the BNC type electrical connectors; 
     FIG. 5 is a front perspective view of a female BNC type electrical connector; 
     FIG. 6 is a rear perspective view of an embodiment of a BNC type electrical connector contemplated by this invention; 
     FIG. 7 is a front perspective exploded view of an embodiment of the electrical connector as shown in FIG. 6; 
     FIG. 8 is a perspective view of a transformer mounted within female receptacle contact, as contemplated by an embodiment of this invention; and 
     FIG. 9 is a front perspective view of an embodiment of a BNC type electrical connector contemplated by this invention. 
     FIG. 10 is a side cross-sectional view of one embodiment of a BNC type electrical connector contemplated by this invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Many of the fastening, connection, manufacturing and other means and components utilized in this invention are widely known and used in the field of the invention described, their exact nature or type is not necessary for an understanding and use of the invention by a person skilled in the art or science, and they will not therefore be discussed in significant detail. Furthermore, the various components shown or described herein for any specific application of this invention can be varied or altered as anticipated by this invention, and the practice of a specific application of any element may already be widely known or used in the art or by persons skilled in the art or science, and each will not therefore be discussed in significant detail. 
     The terms “a”, “an”, and “the” as used in the claims herein are used in conformance with long-standing claim drafting practice and not in a limiting way. Unless specifically set forth herein, the terms “a”, “an”, and “the” are not limited to one of such but instead mean “at least one”. 
     The acronym “BNC” is well known in the industry as identifying a specific type of electrical connection or connector, namely a Bayonet Neil-Concelman (“BNC”) connector. BNC connectors were developed many years ago and are typically used to connect coaxial cables which are two-conductor cables. The “B” stands for bayonet type of connection, and there is also a TNC connection which is, instead of a bayonet connection, a threaded connection. When the term “BNC” is used herein or in the claims, it shall also be construed to include a TNC connection. 
     Referring to the drawings, FIG. 1 is an exploded side view of a typical DSX cross-connect telecommunications jack assembly, which is similar to those disclosed and described in the jack assembly module disclosed in U.S. Pat. No. 4,975,087 (which is incorporated herein by reference), in a module frame work. While one embodiment of this invention contemplates jack assemblies in a module, other embodiments also contemplate a plurality of individual jack assemblies connected to a rear printed circuit board panel. 
     Cross-connect jack assembly  1  includes framework  2 , front panel  3 , front surface  4  to front panel  3 , monitor switch assembly  5 , output switch assembly  6 , input switch assembly  7 , pin connectors  10  and LED display  11 . FIG. 1 also illustrates a rearward printed circuit board  8 , with BNC type electrical connector assemblies  9  mounted thereon. Item  8  may be representative of a circuit board panel to which many jack assemblies may be attached, or it may represent a circuit board for one individual module, such as a four jack module, depending on the embodiment of the invention. As is well known, the printed circuit board has conductive traces imparted thereon for carrying electrical signals as desired. 
     FIG. 2 is a front view of the telecommunications cross-connect jack assemblies  1   a ,  1   b ,  1   c  and  1   d , held together side by side to form a module, and illustrates the front surface  4  of front panels  3 , monitor aperture  15 , output aperture  16  and input aperture  17 . Plugs are inserted through the monitor aperture  15 , the output aperture  16  and/or the input aperture  17 , to make electrical contact with the respective switch assemblies. Also shown are LED displays  11  and pin connectors  10 . 
     FIG. 3 is an exemplary electrical schematic representation of a jack assembly within the cross-connect assembly  1 . Apertures in the front panel  4  are depicted as sleeves  20 ,  21  and  22 . Switch assemblies  5 ,  6  &amp;  7  are schematically depicted, as is ground terminal  23 . Switch assembly spacer  24  is also schematically depicted within switch assembly  5 . 
     FIG. 3 also schematically depicts the terminal pins or connector pins for the front cross-connect module. Schematic lines  26  illustrate terminal pins  26  and schematic lines  27  the lines to output electrical connectors. A specific electrical scheme is not necessary to practice this invention. 
     FIG. 4A is a rear view of a prior art circuit board  30  configuration with traditional BNC type electrical connectors  31  mounted thereon, and FIG. 4B is a front view of circuit board  30  with multiple transformers  32  mounted thereon and electrically connected to the BNC type electrical connectors  31 . This invention mounts a transformer in each electrical connector  31  and thereby eliminates the need to separately mount and electrically connect the transformers  32  shown in FIG. 4B to the circuit board  30  (as must be done in the prior art shown in FIGS. 4A &amp; 4B. The specifications and typical components of the BNC and TNC connectors are known in the industry and will not therefore be discussed in great detail herein. 
     FIG. 5 is a front perspective view of a female BNC type electrical connector assembly  40 . Electrical connector assembly  40  includes housing  41 , with both a connector portion  41   a  and with a mount structure portion  41   b . The connector portion  41   a  of the housing  41  includes engagement pin  43  which extends radially outward from the sleeve or connector portion  41   a , adapted to engage and interact with slots in the male BNC electrical connector, all of which is well known in the industry. Also shown is female receptacle contact  44  within the connector portion  41   a  of the housing  41 . The female receptacle contact  44  is adapted within the housing  41  to engage the male BNC center terminal of a male BNC electrical connector, as is standard and known in the industry. 
     The mount structure portion  41   b  of housing  41  includes an internal cavity which receives and houses the transformer and other components of the electrical connector assembly  40 . The mount structure portion  41   b  further includes mount legs  42  which may be inserted through apertures in the circuit board and thereby soldered or otherwise attached to the circuit board, as further disclosed later with reference to FIG.  9 . 
     FIG. 6 is a rear perspective view of a BNC type electrical connector assembly  40  contemplated by an embodiment of this invention, illustrating the housing  41 , the connector portion  41   a  of the housing  41 , engagement pin  43 , the mount structure portion  41   b  of housing  41 , and mount legs  42 . 
     FIG. 6 also illustrates electrical contacts  45  extending from transformer  46 . Electrical contacts  45  are disposed and adapted to be connected to traces on the printed circuit board to which the electrical connector assembly  40  is mounted. 
     FIG. 7 is a front perspective, exploded view of the electrical connector assembly  40  as shown in FIG. 6, showing electrical connector housing  41 , insulator  50 , female receptacle contact  44  which inserts into insulator  50 , and transformer  46 . Transformer  46  may be a transformer such as that available through Midcom as part number 50622, and includes electrical contacts  45  for electrically connecting the electrical connector to the circuit board and transformer output  47  which is inserted and mounted into female receptacle contact  44 . 
     FIG. 8 is a perspective view of transformer  46  mounted within female receptacle contact  44 . Transformer output  47  is inserted within the female receptacle contact  44 , and electrical contacts  45  are also shown. 
     FIG. 9 is a front perspective of a BNC type electrical connector assembly  40  embodiment of this invention, illustrating circuit board  52  with electrical contact apertures  54  in the circuit board through which electrical contacts  45  are inserted and which may be soldered to the other side of the circuit board. Circuit board  52  also includes mount leg apertures  53 , through which mount legs  42  are inserted and which may also soldered to the other side of the circuit board  52 . 
     FIG. 10 is a side cross-sectional view of one embodiment of a BNC type electrical connector assembly  40  contemplated by this invention, illustrating electrical contacts  45 , mount legs  42 , transformer  46 , connector portion  41   a , mount structure portion  41   b , female receptacle contact  44 , insulator  50 , engagement pins  43 , and the open interior chamber of the electrical connector assembly  40 . Transformer output  47  is shown inserted within female receptacle contact  44 . 
     In compliance with the statute, the invention has been described in language more or less specific as to structural and methodical features. It is to be understood, however, that the invention is not limited to the specific features shown and described, since the means herein disclosed comprise preferred forms of putting the invention into effect. The invention is, therefore, claimed in any of its forms or modifications within the proper scope of the appended claims appropriately interpreted in accordance with the Doctrine of Equivalents.