Metal working – Means to assemble or disassemble – Means to assemble electrical device
Reexamination Certificate
1999-10-01
2001-11-06
Arbes, Carl J. (Department: 3729)
Metal working
Means to assemble or disassemble
Means to assemble electrical device
C029S747000, C029S854000
Reexamination Certificate
active
06311392
ABSTRACT:
FIELD OF THE INVENTION
The present invention generally relates to telecommunications. More specifically, the invention is related to a telecommunication cordage fixture and insertion tool for holding cordage during wire management and assisting in the insertion of a plug subassembly into an outer housing of a communication modular plug, while ensuring minimal wire shift.
BACKGROUND OF THE INVENTION
Modular telecommunication cords are used in the field of telecommunications for connecting between modular telecommunication devices. These cords hold cordage, which is comprised of a series of wires, within an outer jacket which, in turn, protects the cordage. Generally, a communication modular plug is located on the ends of the modular telecommunication cord, for connecting to modular telecommunication devices.
In accordance with the latest modular telecommunication cord design, one end of a sled is inserted into the outer jacket of the telecommunication cord, thereby providing a means of externally arranging the series of wires in the cordage. Wire arrangement is usually performed according to the polarity of the wires, although wire arrangement may be performed for other reasons. A metal crimp ring is also used to provide strain relief on the outside of the outer jacket.
Unfortunately, the cordage is difficult to hold while manipulating the wires for purposes such as arranging and inserting the wires into the sled, and inserting into a housing. To accommodate this difficulty, production operators generally have a tendency of wrapping the cordage around their fingers, thereby providing a better grip of the cordage during manipulation. This generally used technique causes the length of the wires to be uneven within the outer jacket of the cordage. Finally, when the wires are situated in the sled, they are trimmed.
Production of the finished modular telecommunication cord requires insertion of the wired sled into a housing, which, in combination with the sled, provides a means of connecting the modular telecommunication cord to modular telecommunication devices. Unfortunately, insertion of the wired sled into the housing, by holding the cordage, provides a further strain on the wires of the cordage, and additional shifting of the wires.
During the transmission and reception process of a telecommunication device, a receive signal, received from a first transmission line, can be corrupted by a transmit signal located on a second transmission line. This corruption is oftentimes referred to as an “echo” in that the corruption is substantially similar to the transmit signal, although attenuated in amplitude and delayed in phase in comparison. As such, each modular telecommunication cord has its own echo. One source of this echo in the cord is attributed to the length of wires in the outer jacket of the cordage. This “echo” is generally cancelled by the modular device to which the cord is attached. If however, numerous cords are attached to the modular device, via modular plugs, it is difficult, if not impossible, for the modular device to provide “echo cancellation” for all cords attached. Different lengths of wires within the outer jacket of the cordage provide different “echoes,” thereby making it difficult for the modular device to provide accurate echo cancellation for all modular telecommunication cords attached thereto, without excessive cost for additional echo cancellation devices.
Therefore, it is desirable to provide a system and method for creating modular telecommunication cords having similar echo properties.
SUMMARY OF THE INVENTION
Briefly described, the invention provides a cordage fixture and insertion tool for assisting in the creation of modular telecommunication cords, while assuring that the modular telecommunication cords have similar echo properties.
Generally, the tool supplies a means of securing a modular telecommunication cord, having a sled attached thereto and wired to wires within the cord, before insertion of the wired sled into a housing. Securing of the cord prevents the creation of different lengths of wires within the cord after clipping of the wires. This assures that cords created with use of the tool will have similar wire length, thereby assuring that proper echo cancellation may be provided by a modular device, to which the cord is attached.
The tool comprises an elongated body having a longitudinal concave portion therein, which extends through the length of the tool. The width of the longitudinal concave portion is shaped in accordance with the size of the cord for which the tool is created. An elongated member extends from one end of the elongated body in a manner axially adjacent to the central axis of the longitudinal concave portion, and is capable of receiving a crimp ring, located on the cord.
An alternative embodiment provides for the elongated member to be removably attachable to the elongated body.
The invention has numerous advantages, a few of which are delineated hereafter as examples. Note that the embodiments of the invention which are described herein possess one or more, but not necessarily all, of the advantages set out hereafter.
One advantage of the invention is that, it provides a means of assuring that the echo properties of multiple modular telecommunication cords are similar so that the modular device, to which the cords are attached, may provide effective echo cancellation.
Other features and advantages of the invention will become apparent to one of reasonable skill in the art upon examination of the following drawings and detailed description. It is intended that all such additional features and advantages be included herein within the scope of the present invention, as defined by the claims.
REFERENCES:
patent: 2907241 (1959-10-01), Lazar
patent: 2960864 (1960-11-01), Watts
patent: 3010193 (1961-11-01), Croall, Jr. et al.
patent: 3074155 (1963-01-01), Cootes et al.
patent: 3538585 (1970-11-01), Hendry et al.
patent: 3605234 (1971-09-01), Bogursky
patent: 3811168 (1974-05-01), Anderson et al.
patent: 5655294 (1997-08-01), Makino
Arbes Carl J.
Avay Technology Corp.
Thomas Kayden Horstemeyer & Risley LLP
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