Electrical transmission or interconnection systems – Switching systems
Patent
1997-10-21
1999-11-16
Paladini, Albert W.
Electrical transmission or interconnection systems
Switching systems
307147, 200175, 34082589, 370355, H04L 1202
Patent
active
059863560
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention concerns the field of electrotechnical applications, with particular regard to the reception and switching of electrical signals (normally low voltage) used for the transmission of data, pictures, sound, etc.
DESCRIPTION OF THE RELATED ART
These signals are currently sent to several primary offtakes with multiple contacts: although these offtakes each have at least four pairs of contacts, usually only one of these pairs is used, and from these there is only one outgoing pair (known popularly as <doublets>) of conductor wires carrying a given input signal. The pairs of wires which lead, as stated, to the primary offtakes are then connected to a multiple terminal connection element (plug or point). Offtakes are points at which an electrical signal is available to be taken off of or provide to, a particular device. In the present situation, to be taken off or provided to a connection device.
In current practice, four of these primary offtakes are used, with a total of eight conductor wires leading, as mentioned, to a connection plug or point with eight terminals.
The latter is then connected to a further of offtake or plug, respectively, with an equivalent number of terminals, from which a further eight cables lead, forming four doublets each of which is then connected to a single offtake, which can be termed the secondary offtake to distinguish it from the aforementioned primary offtakes, and this acts as an outgoing offtake to utilize the signals which reach it. Examples of this kind of connection devices are given by U.S. Pat. Nos. 4,907,253, 4,773,867 and 4,579,407.
From the description given thus far, it can be seen that to switch just four incoming signals, a total of eight offtakes with eight terminals has to be used (four for incoming signals and four for outgoing signals) connected by means of connection components with eight poles.
In addition, once one of the secondary offtakes for the outgoing signals is connected such that it; can receive a given signal received as an incoming signal by one of the said primary offtakes, this situation remains locked virtually permanently under the effects of time constraints.
Finally, in order to reduce the disadvantages of this signal switching and receiving system, modifications are, made to the connecting offtake/plug pairs, setting pairs of terminals in electrical contact which lead to different <doublets> in a predetermined mode, different from those in the original arrangement, by means of electrical <bridges> or similar devices.
In addition, both the aforementioned primary and secondary offtakes are under-used, with many of the contact terminals not connected to any signal.
SUMMARY OF THE INVENTION
To eliminate the disadvantages described above, the inventor of this invention has devised a connection device for the reception or switching of electrical signals which, as well as comprising the component parts described previously and corresponding to the state of the art, is characterized by the fact that it also includes a means of selective, reversible connection of pairs of contact terminals on the multiple outgoing offtake, or plug respectively, with the same number of pairs of terminals as the said primary offtakes to which the said pairs of conductors carrying incoming signals lead, and a means of selective, reversible connection of pairs of contact terminals on the said outgoing multiple offtake or plug, respectively, to which the outgoing conductors lead and the same number of pairs of contacts on the said secondary multiple contact offtakes for utilization of the signals.
BRIEF DESCRIPTION OF THE DRAWINGS
A description is now given of a preferred example of construction of the device as per the Invention, in which reference is also made to the attached drawings which show:
More specifically, contact terminal 1 of incoming plug C1 can be connected to contact 1 of primary offtake A1 by placing element 1 of SW1 in an on (closed) position thereby completing the circuit between contac
REFERENCES:
patent: 3891815 (1975-06-01), Hiele
patent: 4345251 (1982-08-01), Begeman et al.
patent: 4993018 (1991-02-01), Hajikamo et al.
patent: 5237565 (1993-08-01), Henrion et al.
patent: 5361254 (1994-11-01), Storck et al.
Borsetto Giancarlo
Poletti Bruno
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