Electrical connectors – Contact comprising cutter – Insulation cutter
Patent
1994-09-21
1996-02-27
Pirlot, David L.
Electrical connectors
Contact comprising cutter
Insulation cutter
439578, H01R 424
Patent
active
054944546
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a contact housing for coupling to a coaxial cable having varying cross-sectional dimension, comprising a housing of electrically conducting material and constituting coupling means for the screen or shield coaxial cable, and a therefrom insulated centre conductor coupling means, for electrically conducting coupling to the centre conductor of the coaxial cable.
As well known, the conductor of a coaxial cable is positioned centrally within the cable and insulated from a conducting screen or shield surrounded by the external insulation.
With a coaxial cable coupling, the cable nut and locking disc are threaded, as known per se, into the coaxial cable prior to the external jacket being scraped off over a length of about 3-4 cm. The screen or shield is cut about 9 cm from the end of the external jacket, and the screen sleeve is threaded in until it stops against the end face of the external jacket. Thereafter, the strands of the screen are splintered and folded back over the screen sleeve. The centre conductor is cut at 5,5 mm and is stripped of insulation, such that the-insulation becomes 3,5 mm and stripped centre conductor 2 mm. The foil screen can overlap the dielectric by about 2 mm. Prior to the coaxial cable being mounted, the centre conductor point is threaded into an insulation piece and conducted into the contact housing. A centre sleeve is threaded over the centre conductor which is mounted to the contact housing and screwed into place by means of a wrench or an adjustable spanner. Thereafter, the centre conductor point is soldered to an electrically conducting portion of the contact housing.
Prior art contact housings of this general kind are only in a position to be coupled to a coaxial cable of one particular dimension, and the soldering represents a considerable problem with respect to fault finding in order to determine whether the soldering is poor. As a result of the soldering, hut also due to other factors, this way of mounting is cumbersome and time-consuming.
Improved contact housings of the kind defined introductorily distinguish themselves through mole suitable centre conductor coupling means and cooperating locking means therefore, see EP-412412. A resilient attachment of the centre conductor of a coaxial cable in such a contact housing is known from U.S. Pat. No. 4,892,491.
According to the present invention one has aimed at providing a contact housing for coupling to coaxial cables having varying cross-sectional dimensions, and render unnecessary said soldering operation, and wherein the coupling operation is substantially simplified in relation to conventional technique.
In accordance with the invention, this object is realized through designing the coaxial cable contact housing as set forth in the following claims.
In accordance with the invention, a contact housing of the kind defined introductorily is assigned a locking sleeve of electrically conducting material and which can be connected firmly with the contact housing, said locking sleeve being formed to accommodate and cooperate lockably with knife contacts having a varying width extent laterally of the axis of the locking sleeve and the width thereof being adjusted to the cross-sectional dimension of the coaxial cable concerned.
Examples of preferred embodiments of the invention are further explained in the following, reference being made to the accompanying drawings, wherein:
FIG. 1 shows an axial section through a contact housing according to the invention, a relatively thick coaxial cable being fitted into the same;
FIG. 2 shows a corresponding axial section through a contact housing insignificantly modified in relation to the contact housing of FIG. 1, a relatively thin coaxial cable being fitted into the same;
FIG. 3 is a cross- sectional view along the line III--III in FIG. 1, showing merely means for coupling to the centre conductor of the coaxial cable, namely a portion of a centre conductor coupling means of metal and a locking means of non-conducting material both incorporated into the
REFERENCES:
patent: 4881912 (1989-11-01), Thommen et al.
patent: 4892491 (1990-01-01), Budano, II et al.
patent: 4932898 (1990-06-01), Goodman et al.
patent: 5037329 (1991-08-01), Wright
Demello Jill
Pirlot David L.
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