Geometrical instruments
Patent
1985-03-18
1986-10-07
Weidenfeld, Gil
Geometrical instruments
339177R, 339143R, 339213R, H01R 1100
Patent
active
046155740
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF INVENTION
The invention relates to a device for terminating an electrical cable such as a multi-core electrical cable.
BACKGROUND ART
Electrical cables such as of the multi-core kind are often connected with electrical components such as multi-pin connectors. If a connection has to be modified or checked, it is usual not to be able to carry out such a task without destroying the interface and hence vitiating the integrity of the design characteristics of the connector.
DISCLOSURE OF INVENTION
It is an object of the invention to seek to mitigate this disadvantage.
According to the invention there is provided a device for terminating an electrical cable, comprising a flexible and resilient sleeve for securing to an outer surface of the cable and an end termination which is engageable with and disengeable from an electrical component to which the cable is to be connected, the arrangement being such that when the end termination is disengaged from the component the device can be retracted effectively by shortening the sleeve and withdrawing the end termination whereby to expose the cable connection.
Using the invention it is possible to provide an electrical connection which is re-enterable to enable rework to be carried out on an end termination interface.
The sleeve may be convoluted, preferably with helical convolutions, to enable the sleeve to be compressed axially when the device is retracted. This is a relatively simple yet efficient construction.
The end termination may have screw threads for engagement with a complementary screw thread of the electrical component. This construction is relatively simple yet provides for efficient engagement and disengagement.
The end termination may include a seal such as an "O"-ring. Such a seal protects the interior of the device against penetration by moisture, so obviating electrical short circuits.
The device may include means to bond mechanically with a metallic screen of the cable. This construction, particularly where the cable is a screened multi-core cable, provides for EMC screening through the end termination.
It will be understood that the invention extends to a cable including a device as hereinbefore defined.
Devices for terminating an electrical cable, embodying the invention, are hereinafter described, by way of example, with reference to the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a part sectional view of a first device according to the invention mounted on the end of a multi-core electrical cable and connected with an electrical component in the form of a multi-pin connector;
FIG. 2 is a view, to a smaller scale than that of FIG. 1, of the cable and device;
FIGS. 3 and 3A show, in part longitudinal section and enlarged relative to FIG. 1, a second embodiment of device according to the invention;
FIGS. 4 and 4A show, also in part longitudinal section and enlarged relative to FIG. 1, a third embodiment of device according to the invention; and
FIG. 5 shows a device according to the invention in use.
Referring to the drawings the device 1 shown comprises a flexible and resilient sleeve 2 made of rubber, rubber-like, plastics or similar material and a metal end termination 3 which has a screw thread connection with an electrical component 4 in the form of a multi-pin connector or plug. The end termination 3 has an interface 5 for conductors or wires of the multi-core cable and a body 6 which has a tapered entry 7 in which is received the sleeve 2 and metal braids 8 which screen the cable 9. There is a seal in the form of an "O"-ring 10 at the blind end of the entry 7 to prevent moisture getting into the cable. The other end of the sleeve 2 from the body 6 is mechanically secured as by adhesive to the outer surface of an outer sheath of the multi-core cable 9 at anchor 11.
In use, the sleeve 2 is secured as shown and the other end, with the braid, is drawn into the body 6 by screwing, so forming a firm mechanical bond over 360.degree., which ensures screening of the connection and the cores connected in t
REFERENCES:
patent: 2501674 (1950-03-01), Graham
patent: 2755449 (1956-07-01), Anderson
patent: 3347566 (1967-10-01), Nelson
patent: 3624595 (1971-11-01), Severin
patent: 3742426 (1973-06-01), Huber et al.
patent: 4325600 (1982-04-01), Nestor
Icore International Limited
Pirlot David L.
Weidenfeld Gil
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