DE1590990A1 - Connector for electrical conductors - Google Patents

Description

■ b: .iüxtii ELüGiTtlG GüHPAHX, Incorporated 'D «{DeSmith 1

iicw York 7 "H. T. USA

Dr. E xpl. ' I.

Connectors for e lektr ical ^director:

"^ he invention relates to ^ connectors for electrical conductors, especially for connecting insulated Lead wires without "removing the insulation"

Such connectors are disclosed in U.S. Patent 3,065,072 (H.ü cG-raff et al) dated November 13, "1962 disclosed to the applicant" according to this. Bat el nt is surrounded by an insulating jacket outer insert or sleeve of relatively soft material and an inner insert or sleeve of relatively hard, resilient material Haie rial β The inner one. Sleeve is pierced, v / obei a multitude of l> urchlö'GB, .rutigen arranged at a distance from one another, with thereby determined, inwardly extending protuberances were formed. When in the an insulated wire is inserted into the inner sleeve, and the insulating dumbbell is subjected to pressure a compressive action 'takes place on the outer sleeve, whereby again the inner sleeve is pushed together so that the protuberances through the insulation of the conductor wire be driven and make contact with its metallic.

In the above-mentioned patent, the perforations in a square shape are disclosed as ideal - this is achieved by pyramid-shaped mandrels, which are guided in square G-guide bores in order to push through the metal and in square openings in the die, the carries to enter. Since these dies and guide bodies have a number of square. Have bores, they cause prohibitive costs. It was necessary in the "practice, pyramidal edged round mandrels with matrices and Pührungskörpern, up the round holes * 'have to take to use. With such equipment

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the perforations have a round ^shape ; and the protuberances became more flat, cylindrical around the axis perpendicular to the surface of the socket. This curve shape increased the degree of stiffness of the protuberances. will. In this way, after a piatical deformation, such as when the connector is pressed in to connect the - "elbows, the space is limited by the cylindrical curves in that the protrusions spring back again. Like the connector during its assumed forty to sixty Years of service life, the relatively stiff protuberances of limited springback cannot produce the same elastic adaptation to the changes in the shape of the lines and the sleeves do not retain the desired resistance wedge! With regard to electrical contact.

In addition, there are free spaces between the perforations in the longitudinal direction of the sleeve. Bs is-.possible, that a wire arranged in the inner sleeve can be aligned with one of the spaces, and there is a possibility that when you press the soft sleeve, there is only contact between a faar protuberance and the wire. Such limited contact would not be immediately noticeable be. If the relatively little resilient protuberances make contact with the lose lines, this limited contact can become evident «.

The aim of the invention is to multiply the likelihood that in a connector of the type described. A large number of projections pierce the insulation type and occur in electrical contact with the metallic wire · the conductor. According to the present invention, the connector comprises a soft metallic outer sleeve which is surrounded by an insulating jacket and. a hard, spring-like, metallic sleeve that is telescopically inserted into the outer sleeve. The inner sleeve

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15Q099Q

has a plurality of ger & aen elongated holes, slide each have an accessory ,, the .axis transversely to the extending of the inner sleeve and having a-plurality of inwardly directed, isolation-Piercing and wire contacting protuberances ₀

With regard to another & eSichtspunkt the invention, the protuberances or iiitnehmer uder by piercing blades are of netalls ILngs a ^v ielzahl of zig-ZacL: - ■ lines quer'zu formed the axes of the sleeves and by pressing in the sawtooth-like protuberances £ Labei rural xerforierungen achieved, Such sawtooth protuberances are flat and extend along a straight line ■ the edge of the perforation. forms. Preferably, the webs between the perforations are made sufficiently long in relation to the material thickness in order to achieve elastic bending like a cross bar when the driver is pressed. These special features expand the space through which the drivers spring back after deformation

Since uie -rerf ora.tionen are elongated, extends a continuous row of abutting drivers from the inner üiiilageo in addition, the protuberances are on a lümte of the perforation in relation to the Protrusions of the other edge arranged offset, so that the approaches to the one ..ante the tips of the protuberances on the other ..ante opposite. This makes the probability an electrically conductive contact of the bulges with the line multiplied.

The advantages of the invention will become apparent from the following detailed description of a Ausfühi-ungse form of the compound of the invention with reference to the accompanying drawing duty recovery ^v; show in the drawing:

Fig. 1 is an exploded perspective view View of a connector according to the invention the individual share together with a couple insulated lead wires that insert in it

crmM ^ßinOi 00081 67 0 94 7

BATH ORIGINAL

Pig. 2 is an enlarged perspective view of a

• inner sleeve before it is finished the inside, the formation of the protuberances, the through which perforations are formed can be seen " are ι

3 is a perspective view of a cutting machine which forms the perforations in the inner sleeve?

FIG. 4 shows a sectional view of the cutting machine according to FIG Pig. 3 after 5Ϊ8 breached the inner sleeve has j

Pig. 5 a perspective rope view of a "tool, that is suitable for compressing the connector into close contact with the leads is;

Pig. 6. A section of the cut along the line 6-6 in Pig. 5 showing the position of the claws in i ^ rer Relationship to the connector after deformation illustrates;

Pigο 7 is an enlarged, partially sectioned longitudinal view, which shows the conduit and connector in their relative position before deformation j

■ and

Pig. 8 is a view similar to FIG. 7, showing the lines uno. shows the connector after its deformation and illustrates how the insulation is broken and the protuberances over the metal pipe capture.

In the drawings it is shown how the connector GOlT according to the invention is composed of three parts namely from an outer plastic jacket 10, from a first inner metal sleeve or inner insert 12 and off

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an outer ^xl metal sleeve or an outer insert

14. ■ ' _

- accession plastic coat 10 is _r liaterial such as polyethylene of a shrinking under heat ends, the · is shrunk by heat to the outer sleeve 14 when the parts are assembled during the He..Stellungsprozesses. A pair of wires or wires 16 and 18 are inserted into the inner sleeve 12 when the connector is in use. Like in Pig. 1 to see the inner liner or the inner sleeve 12 is relatively thin in relation to the outer liner, and is made of hard spring like liaterial as feuerverzinnter, spring-tempered phosphor bronze _T. The inner surface of the sleeve 12 is provided with a multiplicity of inwardly perforated, elongated perforations 20. The piping, which extends transversely to the axial direction of the sleeve, has a number of essentially flat and aligned saw-tooth protuberances on each longitudinal edge of each perforation or drivers 22 which extend transversely to the plane of the perforation. The protuberances 22 form a row of juxtaposed, knife-like edges with a sawtooth design.

Each perforation 20 and its protuberances 22 are cut by a Sage dental cutting machine 23, such as iß. Mg. 3 and 4 are formed in the sleeve 12 when they are still in a flat condition. For the sake of simplicity I the tool 23 is off. formed by the two parts Kt and M2, which are in engagement with one another with Ziek-Zaek surfaces. The tool pierces the ^H etall der.Hülse 12 at corresponding; corresponding points 24 and moves aioh naoh down against the metal. ' The ^a etal lies horizontally on a template 25 which has a slot 26 ( "shown" ■ at φ in Pig. 4) of the tool and SiOH mil "greater than the thickness of this is in ^l alignment. As the Tool 23 moved near the bottom, the angled edges 27 cut the material of the sleeve 12 along a Ziek-Zag? Or sawtooth line 28,! ■ y / uring the movement near the bottom forces an inclined surface:

00-9816 / 0947

30, which adjoins the angled edges 27, are sawtooth-like. Protrusions 5: 1, which were cut out from the edges 27 and are in Pig »3 apart, downwards so that they are around the lines 32 (in Fig. 3 ale Dash-dotted lines to, -see) are bent downwards. This can be seen clearly in Figure 4. Like the tool 23 in as its movement progresses downward, the bend the angular surface η 34 adjoining the piercing faces of the tool 23 is inverted by the sawtooth types Avis 35 along the line 36, shown in phantom in Fig. 3. After the tool 23 is withdrawn, the process becomes for a number of perforations, repeated in parallel with the original perforation. Several can of course Perforations at the same time with a multiple tool · It should also be considered that the saw teeth can be used in a different way in one of the Fold the protuberances can be cut separate step.

The resulting protuberances are essentially flat, sawtooth-like, in alignment with one another and · have substantially straight baselines that have a very small bend about their perpendicular Axis is granted.

Tor or naoh, but preferably after generating the Protrusions in the sleeve 12, the edges of which are cut transversely to the perforations and curved, as shown in Fig.

and then bent to the shape shown in FIG to see. The connector COlil · is assembled by the inner insert 12 in the softer outer insert 14 is pushed and by heat shrinkage the insulating Plaiikmantel 10 is placed around the outer insert.

When used, the ends of two insulated cables are used 16 and 18, which are to be connected in an electrically conductive manner, into the inner insert of the composite GOB connector introduced as far as possible. The connection is then pressed together with a tool. 009 816/0947

-Pig. 5 shows a. suitable, known pressing tool 40, daa Has jaws 42 and 44, on denai the press dies 46 and between which the assembled connector with leads 16 and 18 are pressed. Hit the tool 40 the connector is pressed after the lines 16 and 18 were introduced therein to the protuberances 22 with the "Bring" metal cores in lines 16 and S8 into contact. »

■ »
Like from the Pig. 6, "as can be seen, the dies 46 and 48 have a conical shape in order to be able to enclose the connector inserted between them to different degrees» "This results in a firmer encasing. the closed end than the open end in which the lines 16 and 18 are fed. Figure 7 shows the relative position to one another which the dent in the connector COIT and the lines 16 and 18 inserted therein assume before deformation. The dumbbell TO and the sleeves 12 and 14 have a substantially uniform diameter and the protuberances 22 are located at a distance with respect to the lines 16 and 18, of which only the line 16 will be described for the sake of clarity.

Pig. 8 shows the effect of the deformation of the connector 00U by one in Pig. 5 shown tool 40. The compression between the jaws 42 and 44 causes the insulation to break open the line 16 and subsequently a detection of the metaiii see. Leadership in. A varying degree of what through the conical design of the dies is conditional

sGesenke 46 and 48 press the sleeve 14 and achieve a plastic divergence showing in. ihre.ι pressed state, a "Return springs ¹¹ of the elastically deformed sleeve 12 from Peder-Haterial prevented. The Pig. 8, that the projections 22 is closed at the end of the connector 0OH very far engage the line 16 _e it is possible that such a procedure can pass through the conduit and severed. the conical ü es oaltung the Gesenke4o and 48 and characterized erzäelte different Umschaließung ensures that a Durchthreünen ,, v.xvx - ^ ?. · \ 3.? Opinion occurs on the end of the line 16 at the closed end of aes BADOBlQiNAt 009816/0947

Yerbinders GOU, remains restricted. The elongated perforatiorieu 20 ensure a straight baseline of the AuBS'öülpiiir.u'en 22 and lead around a curvature of the bage tooth protuberances its vertical axis back to a minimum. Any Curvature is substantially parallel to the axes of the metal of the sleeve 12 based on the curvature limited during the formation of the protuberances. "There such Bends do not strengthen the protuberances against a load from the direction in which they are erected, this bending has few unpleasant effects

with
The protuberances can be made relatively simple, the slits of which can be considerably longer than the "width w in pig" 3 of the cutting tools 23 with which they coincide mec: B nis-ch. subdivided parts, the bearing of which can be adjusted to a predetermined angle, provided that the planes of the protuberances in relation to the surface of a non-stretched connector.

The protuberances are transversely across the inner aisle 2ü arranged in rows of juxtaposed edges. This engages the hood-like driver in each row into a tube inserted into the sleeve 12 considerably enlarged. Through the effectiveness of this sawtooth-shaped design achieved by the mandrel 23 by removing the protuberances on one edge of each perforation from the protuberances on the anueren If the edge is displaced, this probability is further increased.

The spaces or ridges 50 between the perforations are made relatively large in relation to the metal thickness. Since the protuberances and the webs are completely out hard "metal are formed, the force that bends on the protuberances exerted when the sleeve 12 is compressed is, the webs arching inwards · This arching is best in long form. 8 to see · A longer one A bridge can span a longer distance than a kuraor bridge

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That fact together with the flat one. Basic style of protuberances increases the ability of protuberances. through a long. Rash elastic too recover. ■.

Another part of the gate of the connection according to the invention is the uniformity of the achievable size the protuberance «. "^ ine prevents such uniformity unwanted long protuberances »cut the lines when the connection is compressed and guaranteed At the same time, that all protuberances are long enough to pierce the insulation and make contact with the lines to koiaiiien »

While an embodiment of the invention in detail has been described, it is understood that those skilled in the. Modifications made within the scope of the invention can be ο. For example, consider taking the To make inserts 12 and H flat and open in order to -shaped ladder to pick up and hold «

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Claims (2)

J590999 Claims 1ο Bine connection to the Umfa.saen and conn & en the Ends of insulated electrical cables, with "a soft metallic outer sleeve to be pressed together an inner coaxially arranged, made of hard resilient material, which is after has internally extending protuberances which, when the outer sleeve is compressed, in dielectric lines intervene and establish an electrical contact, characterized in that in the inner Sleeve elongated perforations are formed, which are extend substantially transverse to the sleeve axis and that at least one edge of each of the perforations carries a multitude of aligned protuberances, 2. Compound according to claim 1, characterized -gekenaseichnet, that the perforations are essentially free of oil wraps and have substantially-parallel edges and that the bulges are essentially flat and have a sawtooth-like design « β compound according to claim 1 or 2 notably through the in that the protuberances are disposed on a Ilaute of each perforation in the lutte "between UEN protuberances on the other Üante of each perforation ₀ 009816/0947 BADORlQiNAL