Electrical connectors – Contact comprising cutter – Insulation cutter
Reexamination Certificate
2000-02-14
2001-03-20
Abrams, Neil (Department: 2839)
Electrical connectors
Contact comprising cutter
Insulation cutter
C439S395000
Reexamination Certificate
active
06203360
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a conductor-connecting element for connecting electrical conductors to insulation-displacement contacts, wherein the insulation-displacement contacts are held in a contact-carrier and the electrical conductors are inserted in conductor-guiding ducts in a conductor-guiding part, wherein the conductors are deflected in the conductor-guiding ducts, and wherein the conductor-guiding part is moved in the direction of the contact-carrier when a cap nut is screwed on, and the conductors are pressed, in the region of the deflecting portions, into slits in the insulation-displacement contacts.
BACKGROUND OF THE INVENTION
Conductor-connecting elements of this kind are necessary in order to make contact with electrical conductors in cables, without removing the conductor insulation beforehand in a separate working operation.
A conductor-connecting end element with insulation-displacement contacts for the connection of electrical conductors is known from DE 295 12 585 U1, in which all the electrical conductors introduced into a conductor-guiding part are connected simultaneously to the insulation-displacement contacts in a contact-carrier by screwing a cap nut onto the contact-carrier.
In this known embodiment of a conductor-connecting element, relatively high forces occur, which are caused by simultaneous contact-making with the electrical conductors. This, in turn, gives rise to a high expenditure of force for screwing-on the cap nut, so that tightening the latter up by hand is often difficult. Under these circumstances, the cap nut has to be of bulky design in order to pass on the forces that occur.
SUMMARY OF THE INVENTION
The underlying object of the invention is therefore to so construct a conductor-connecting element of the type initially mentioned that a lower expenditure of energy is needed for screwing on a cap nut - and thereby for pressing electrical conductors into the insulation-displacement contacts of a contact-carrier.
This object is achieved through the fact that the conductor-guiding ducts in the conductor-guiding part are constructed in such a way that deflection of the electrical conductors takes place at different levels, the insulation-displacement contacts making contact with the electrical conductors one after another.
An advantageous refinement of the invention is indicated in claim
2
.
The advantages obtained with the aid of the invention consist, in particular, in the fact that the forces and torques involved in the screwing-on of the cap nut are reduced, so that reliable contact is made with even a fairly large number of electrical conductors, in a conductor-connecting element of this kind, even without the use of a tool.
A further advantage of insulation-displacement contacts which make contact one after another lies in the fact that, when there are a number of electrical conductors, it is possible to choose which conductor is to be made contact with first. This is advantageous, for example in the case of an electrical connection which has safety implications, if a protective conductor is always to be made contact with first in the course of assembly, or is the last to lose electrical contact at the insulation-displacement contact in the course of a dismantling operation.
REFERENCES:
patent: 4773875 (1988-09-01), Huiskes
patent: 4969839 (1990-11-01), Nilsson
patent: 5752849 (1998-05-01), Orlando
patent: 657 942 (1986-09-01), None
patent: 295 12 585 (1996-01-01), None
patent: 196 05 083 (1996-09-01), None
patent: 197 25 732 (1999-01-01), None
patent: WO 97/60580 (1997-02-01), None
Harting Dietmar
Lambrecht Heinz
Nowacki Horst
Schreier Stephan
Abrams Neil
Cook Alex McFarron Manzo Cummings & Mehler, Ltd.
Harting KGAA
Nasri Javaid
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