Electrical jack-plug

Electrical connectors – With insulation other than conductor sheath – Plural-contact coupling part

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Details

439695, H01R 1718

Patent

active

047054859

DESCRIPTION:

BRIEF SUMMARY
The invention relates to an electrical jack-type connector, mainly for low voltage purposes, comprising a rod-shaped male part having terminals in the form of conducting, axially displaced contact rings and a matching tubular female part having axially and peripherally displaced inner terminals to form contact with the contact rings of the male part, which female part comprises an outer tube and an inner tube fitted therein, which is formed with slots for the arrangement of the terminals of the female part, each in connection with a respective conductor located between the inner tube and the outer tube for connection with cable conductors within a closed end of the outer tube.
Electrical connectors of this kind are known from U.S. patent specifications Nos. 1,222,585 and 2,703,393, the former of which shows an embodiment in which the female part has ball-shaped terminals in connection with contact springs placed in an annular space between the outer tube and the inner tube, whereas the terminals in the latter patent specification are bent contact springs mounted in slits in a special tubular body.
These known designs have a fairly complicated structure, and in both cases the terminals of the female part take up quite a lot of space such that the connectors in question are difficult to construct in small dimensions and are not suitable for uses in which the male and female parts are to have a comparatively large number of terminals. Moreover, the establishment of a safe contact in the known connectors presupposes a comparatively great pressure action of the contact springs, whereby the operation of the connector may be rendered difficult.
The invention has for its object to provide an improved design of an electrical connector of the kind mentioned, having a very simple construction, comprising a small number of separate parts and having great reliability as regards function and being easy to operate.
In order to achieve this, the connector according to the invention is characterized in that the inner tube is formed for tight insertion into the outer tube and has mainly rectangular slots, each being connected on the external side of the inner tube with a comparatively narrow track extending parallel to the tube axis from the slot to an orifice at one end of the inner tube, and that the terminals of the female part comprise short strip-shaped contact flaps, each in connection with its respective conductor and formed for loose arrangement into its respective slot and the associated track prior to the insertion of the inner tube into the outer tube, the conductors being of such length as to, on the insertion of the inner tube into the outer tube, be led through an aperture at one end of the outer tube, which aperture is close.d by a cap after connection of the supply lines with said cable conductors.
Since the female part comprises only a few separate components, viz. outer tube, inner tube, contact flaps with conductors and possibly a final cap, of which the two tubes and the cap can be made by moulding from a suitable plastic material, and since the contact flaps with conductors are loosely mounted in the slots and tracks of the inner tube so as to avoid fastening operations, the manufacturing costs can be kept very low both in the processing and assembling of the separate components.
Moreover, the hermetically sealed confinement of the connectors of the contact flaps resulting from the tight fitting of the inner tube into the outer tube provides a particularly good protection of the electrically conducting components against mechanical and other influences from the environment.
When the contact flaps are mounted in the slots of the inner tube, the flaps will form cords in the inner tube's circular cross section, thus forming good contact at comparatively modest spring pressure.
Owing to its simple operation, the connector according to the invention is especially suitable for watertight implementation for use in connection with underwater communication equipment and the like, since the connection between the

REFERENCES:
patent: 1222585 (1917-04-01), Carlson
patent: 1950215 (1964-03-01), Baum
patent: 2703393 (1955-03-01), Bird
patent: 3246282 (1966-04-01), Mas et al.
patent: 3546657 (1970-12-01), Cook
patent: 3649948 (1972-03-01), Porter

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