DE2320854A1 - ELECTRIC WIRE CONNECTOR - Google Patents

Description

PATENT LAWYERS

DR. CLAUS REINLÄNDER
DlPL-ING. KLAUS D ^ HARDT, 232085Λ

D - 8 MOKCMEtJ 60
THEODOR-STO ^ M-STXASSE 18a '

268/2

Nitro Nobel AB

710 30 Gyttorp, Sweden

Electrical wire connector Priority: May 12, 1972 Sweden 6276/72

The invention relates to a wire connector for achieving an electrical contact between two electrical wires, with adjacent connecting wires respectively can be connected to an electric detonator. The wire connector preferably has the task of to connect a large number of electric detonators in series «Every electric detonator has a free wire and another wire which ends in a wire connector. Known wire connectors are usually designed as cylindrical tubes or sleeves which are sealed at one end and preferably are made of plastic. The wire connector sleeve is inside with a tube made of electrically conductive Material, such as aluminum, provided. The inner tube lines the inner surface of the 'wire connector sleeve' to a great extent or to a lesser extent. Between the sleeve and the metal tube is inserted one end of an electric wire, which is preferably bare as the between the sleeve and the metal tube introduced wire atuck is stripped. The bottom rope of the wire is under that passed through the lower edge of the metal tube, at his

inner end bent in a U-shape and fed back into the tube. The pipe is held with the in this way Wire end then squeezed together in such a way that the inner peripheral surface of the lower end of the pipe is divided into two sections

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is divided »which are closely opposed to each other and pinch the inserted end of the wire .. the pinched one Metal pipe is now more or less kidney-shaped. The wire tie with the wire attached to it is now prepared to receive another wire end from a neighboring detonator »This further one Wire end is stripped and inserted into the pipe. To achieve electrical contact with> The inserted wire end of the tube can be bent into a U-shape or provided with a tinplate, so that a contact with the inner peripheral surface of the pipe is achieved «The tinplate can be rectangular in shape and bent over in order to secure the inserted wire end to the tinplate in this way. This method for However, making electrical contact has resulted in contact unreliability. To avoid because of this unreliability, attempts have already been made to bend the lower part of the connecting sleeve in a U-shape » In spite of this measure, however, certain transition resistances have been found with regard to large or variable transition resistances Contact difficulties arise.

The purpose of the present invention is to provide a wire connector of the type mentioned above, in which case there is a very good electrical contact between the wires and in which this good electrical contact Contact between the interconnected electrical wires is fully ensured.

The wire connector of the invention has roughly the same structure as the wire connector described above and also has an inner metal tube and an electric wire attached in the same manner as described above. The novelty of the present invention is that the metal tube has only one length which is used to hold the one end of the wire

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sufficient. The length of the pipe need only be a quarter of the known length, for example, and the pipe does not need to be made of an electrically conductive material. The attached wire is stripped over the metal tube over a length of, for example, approximately 2 cm. According to the invention, the wire end to be connected is inserted into the wire connector sleeve in the stripped state in such a way that the stripped piece comes to lie parallel to the piece of the stripped wire which is fastened over the metal tube. In

this condition becomes the connector barrel on its own Axis rotated * In this way, the inserted and stripped wire is wrapped around the piece of stripped and attached wire wound around or twisted with it, making a satisfactory and reliable electrical contact is established between the wires. In addition, material savings are made at the same time achieved by the fact "that the metal tube need only be as long" as it is used to hold one of the Wires is required.

In a modified embodiment of the wire connector According to the invention, the wire end, which between the inner peripheral surface of the connector sleeve and the tube made of electrically conductive material is introduced, instead inserted into the actual pipe and attached to its To be anchored in the ground. This means that both ends of the wire are inserted into the actual pipe.

Characteristic properties of the present invention also emerge from the patent claims.

An embodiment of the invention is shown in the drawings and is described in more detail below. Show it:

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Fig. 1 shows a preferred type of use of the wire connector according to the invention _ff

Pig. 2 shows a connector sleeve with a wire end _{9 attached thereto}

Pig. 3 shows a connector sleeve according to Pig. 2 ₉ into which the other end of the wire is being inserted ;,

Pig. _{4 the further wire end 9} inserted completely into the connector sleeve

Pig. 5 the connector sleeve during the rotary movement their longitudinal axis »whereby the two wire ends are twisted together, and

Pigο 6 the twisted wire ends.

Pig. 1 shows a section through a mountain, or the like terrain _o with three holes 2 _{3 and 4. In each of the holes is inserted 5, 6 and 7, an electric blasting cap. Two conductors, electrically insulated from one another, emanate from each electrical detonator, namely the conductors or wires 8 and 9 from the detonator 5, the wires 11 and 12 from the detonator 6 and the wires 14 and 15 from the detonator 7. The wire 9 is provided at one end with a wire connector, which is described in more detail here. The wire 11 extending from the electrical detonator 6 is inserted into the sleeve 10. The wire 12 is also provided in this ¥ _e ise with a wire connector 13 thereof Lyps as the wire connector 10 degrees. The other end of the wire 14 is inserted into the connector sleeve 13. With the help of the wire connector it is possible to _connect a large number of electrical detonators in series. However, it is readily apparent that the wire connectors do not necessarily have to be wired with electrical detonators ₉ but also as connecting parts

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can be used between any two electrical wires with arbitrary terminations.

Fig. 2 shows an electrical wire connector sleeve 10, which is identical to Yerbinderhülse 13. Although it preferably consists of an outer shell or Sleeve made of plastic, but it can of course also be made of other materials or a combination of Materials. The Yerbinderhülse is preferably made of electrical at its base with a tube 16 conductive material such as aluminum. The tube is at its left end to one Collar 17 widened, which can snap into an annular groove on the inside of the sleeve 10. The sleeve is at its left end so expanded that the electrical conductor 9 with its stripped end 18 easily can be inserted into the sleeve in such a way that the wire between the outer peripheral surface of the tube 16 and the inner circumferential surface of the sleeve or shell is held «The extreme end 19 of the wire 16 is Bent in a U-shape, fed back into the tube 16 and connected to the tube in one way or another, for example by welding or by compressing the pipe end in such a way that the inner surface area of the Tube is converted into two opposing ropes. The wire end 19 is now placed between them and squeezed. The tube thus has the task of securing the part 19, and it can therefore consist of one Material must be made which fulfills this task. One conceivable material is even plastic. The wire and the tube 16 are preferably inserted into the sleeve 10 at the same time and in this method the Wire held at the right end of the tube 16. It is also clear that the sleeve is made from a plastic tube can be established, i.e. that the right basic

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or bottom part can be omitted «The wire 9 points to the left of the pipe 16 a stripped piece. the The described sleeve 10, together with the inserted wire 9, is now for receiving a further wire 20 prepared with stripped wire end 21. Mg. 3 shows the wire 20 which is being inserted into the wire connector barrel.

Fig. 4 shows the wire 20 fully inserted into the connector barrel 10, clearly showing that the Stripped sections 18 and 21 of the wires 9 and 20 have approximately the same lengths. A twisting motion to connect the wires to each other is now possible. If the situation shown in FIG. 4 is present, then the sleeve 10 rotated about its longitudinal axis. Due to the fact that the wire 9 is rigidly attached to the sleeve 10 is, the wires are twisted when the sleeve is rotated about its longitudinal axis, which FIG. 6 clearly shows shows.

The invention described can be varied within wide limits, with the essential points are j that both wires are stripped in the areas in which they are to be connected to one another by twisting, and that one of the wire ends is rigid with the connector sleeve which, when rotated, causes one wire to wrap around the other Wire is moved around and twisted and connected in this way with the other wire.

The electrical wire connector according to the invention can very advantageously be pre-connected to one of the wires of an electric detonator, and the other The end of the wire can remain inserted into the connector sleeve until the detonator is used and thus protected will.

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• - 7 -

Before wiring, the inserted further wire end is pulled out and is in its place the wire inserted which is connected to the wire attached to the wire connector should be twisted.

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Claims (2)

Electrical wire connector to connect to each other of two electrical conductors which, with the exception of their ends, are preferably provided with external insulation are characterized, 3aS is an outer tube or an outer sleeve (10) is provided, which is preferably made of plastic and which is inside connected to a bare or stripped wire end (18) and, for example, together with a detonator is usable that this wire end is also inserted into the sleeve and within the same with respect to the sleeve axis is held eccentrically, and that finally another wire end or stripped conductor end (21) through the same hollow opening as the former end of the wire is inserted through into the sleeve, which with the inserted wire ends (18, 21) around their own The longitudinal axis is rotatable such that the two. Wire ends are twisted together. 2. Connector according to claim 1, characterized by an in the sleeve (10) inserted inner tube (16), which to its locking with the sleeve and for fastening the wire end (18) with an annular collar (17) is provided. 3 ο Connector according to claim 1 or 2, in which a wire is connected to an electrical detonator, characterized in that "the sleeve (10) serves as a protective sheath for a further wire (21) connected to the detonator before the wires are connected to one another. · 309848/0805 Lee on the back