DE1280952B - Metallic connector for electrical conductors, especially insulated conductors - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN W7WW> PATENTAMT Int. CL:

HOIr

EDITORIAL

German KL: 21c -20

Number: 1 280 952

File number: P 12 80 952.8-34 (W 33517)

Filing date: December 13, 1962

Opening day: October 24, 1968

The invention relates to a metallic connector for electrical conductors, in particular insulated conductors, consisting of two coaxially nested, compressed sleeves, of which the inner Sleeve with a large number of the conductor insulation penetrating and grasping the conductor wires Projections is equipped.

Connectors are known which have web-like projections which are pressed between one another, so that the lines wind their way between the webs like a snake. It is also known to press tooth-like ridges into the insulation and bring them into connection with the metal conductor. These connectors do not have sufficient security for an electrical connection, so that in particular with more sensitive circuits, e.g. B. in telephone equipment, usually the conductor insulation is removed and the connections soldered to the required high level of reliability to achieve. ao

It is also known in electrical contact sleeves to have inwardly directed sharp projections that are pressed into the conductor.

The previously known devices were in particular not able to connect low to maintain electrical resistance, taking into account the flow and fatigue phenomena the parts used and their expansion and contraction due to temperature changes are based. Increased under the natural aging conditions or temperature changes the contact resistance of the previously known connecting devices that cut through the conductor insulation extends beyond the limit of permissibility addition, because of the deterioration of the metal interfaces caused by the penetration of Oxygen or corrosive gases. In addition, the familiar ones offered insulation cutting connectors do not have sufficient mechanical security to prevent a External movement of the conductor disturbs the sensitive contact points.

The invention is therefore based on the object of making a connector for electrical conductors available make, which is also suitable for more sensitive circuits and the maintenance of an electrical Contact is guaranteed under a wide variety of conditions.

The invention consists in that the projections through an arbitrarily distributed perforation of a thin, hard and resilient sheet metal are formed, each projection of a plurality of diverging permits.

Metallic connector for electrical conductors,
especially insulated conductors

Applicant:

Western Electric Company Incorporated,
New York, NY (V. St. A.)

Representative:

Dipl.-Ing. H. Fecht, patent attorney,

6200 Wiesbaden, Hohenlohestr. 21

Named as inventor:
Harry James Graff, Timonium, Md .;
Walter Charles Kleinfelder, Summit, NJ;
Paul Charles Schwartz, Bloomfield, NJ
(V. St. A.)

the flap consists of the fact that the outer sleeve - in comparison to the inner sleeve - is soft and light deformable, thick material, and that the connector such, on the entry side of the conductor less than at the other end, that connection of the diverging lobes of one is compressed however, any protrusion at the entry end has no notch effect on the conductor wire towards the other end is increasingly one that engages the conductor wire.

In the connector according to the invention, the projections can when the metallic conductor is detected press in slightly, bend and slide along the ladder. This makes a good electric Contact is made with the conductor without the conductor being cut through or substantially in its cross-section is weakened.

In a particularly advantageous manner, an inner sleeve made of phosphor bronze and an outer sleeve Brass sleeve ensures that the rear suspension does not exceed certain prescribed limits and the favorable electrical contact is maintained after the end of the application of pressure.

In an expedient embodiment, the inner sleeve has a corrosion-resistant coating made of tin.
In a further development, the connector according to the invention is equipped with an additional, known outer jacket sleeve made of insulating material.

809 628/1354

Claims (1)

3 4 Advantageously, the two sleeves 12 and 12 convey this essentially the same the jacket sleeve made of insulating material with an oval properties, like a sleeve made of seamless pipe cross-sectional shape provided, the outer sleeve having material. The sawtooth-like seam makes it possible has a sawtooth-like longitudinal seam. the use of tape material in place The invention is based on embodiment 5 of seamless pipe material, from which a substantial Examples with reference to the drawing, savings in raw material and a reduction in gen are explained in more detail. In the drawings of the manufacturing costs, shows In Fig. 3, a connector is shown in which the F i g. 1 a disassembled connector conductors 14 and 15 are inserted, the connec perspective view, but not yet compressed. Fig. 2 is an enlarged perspective view. Fig. 4 shows the connector after it has been put together. part of the inner sleeve with its projections, was quantity pressed by means of a suitable tool F i g. 3 shows the perspective view of a provision as it is, for example, in FIG. B. in Fig. 5 is shown. With this one binders with inserted conductors before the deformation, tool 18 is a known pressing Fig. 4 shows a representation corresponding to FIG. 3, 15 tool with yoke pieces 19 and 20, in which the which are used to compress the connector by pressing rams 21 and 22, illustrates how from Fig. 6 can be seen, the press F i g. 5 the perspective illustration of a work stamp 21 and 22 obliquely running pressing surfaces, see above for pressing the connector together so that the interposed connector has a F i g. 6 experiences a partial sectional view along the line ao of different compression; at the 6-6 in Fig. 5, the closed end of the connector is the compression F i g. 7 on a larger scale one longitudinally stronger than at its ape end, section of the connector prior to compression, FIG. 7 illustrates the mutual position of the and various parts of the connector prior to assembly Fig. 8 is a representation corresponding to that of 35 menpressen. The sleeves 10, 11 and 12 have one F i g. 7 after pressing together. substantially uniform diameter and the In Fig. 1 is the connector with its three parts, projections 17 are at a distance from the line the jacket sleeve 10 made of insulating material, ζ. B. ter 14. Synthetic resin, an inner sleeve 11 and an outer In F i g. 8 illustrates the changes Sleeve 12 is shown. 30 which move when the connector is pressed together The jacket sleeve 10 is at 13 in any way means of the tool 18 according to FIG. 5 result. The locked one wherein the jacket sleeve 10 somewhat binder has a tapered shape and that beyond the ends of the metal sleeves 11 and 12 in accordance with the taper of the ram. the extends and is beveled at the other end, the conductor 14 surrounding insulation is cut through around the insertion of the sleeves 11 and 12 at the inlet 35 and the projections 17 cut into the metal conductor to make it easier to assemble and, moreover, also a. The incision is different in strength and the introduction of the insulated conductors 14 and 15 is easier according to the different pressures shape when the connector is attached. exercise through the beveled pressure surfaces of the As in the various figures and in particular the press stamp. This type of connection of the ladder others in FIG. As illustrated in Fig. 1, the inner 40 with the connector eliminates the risk of a through-ferrule 11 a comparatively small wall thickness intersection of the conductor 14 and on the other hand takes care of it the outer sleeve 12. The inner sleeve 11 for that a reliable connection between the is made of hard resilient material, such as a conductor and the connector. That is Spring-hardened phosphor bronze, which is expediently important as it is an externally caused beverage is made. The tinning or the movement between the sensitive contact surfaces Bringing a similar corrosion-resistant coating is prevented. A reliable connection is on the inner sleeve 11 prevents the formation of a high resistance film of high resistance on the phosphor stand in the area of the connection in the case of vibration unbronce, also in order to achieve a constant resistance and also provides a current path against the handling of the outer parts of the lead ring Resistance and for a low contact 50 ters 14 of importance. resistance. The sleeve 11 is on its inner surface with The outer sleeve 12 is by plastic flow a multitude of inwardly directed perforations permanently deformed and limited in their deforma- functions 16 provided which projections 17 form. The th state the springback of the elastically deformed Projections 17 can be in any manner on the th inner sleeve 11 made of spring material. To the Inside of the sleeve be distributed. 55 ends of the sleeve 11 can each have a pair of transverse ribs As can be seen in particular from FIG. 2, they are provided so that the rounded or smooth perforations and the parts of the ribs achieved during their manufacture on the insulation of the conductor 14 to the projections 17 are designed so that a large number of diver-plant come and go this way the retention of yawing lobes is created. As the protrusions 17 improve like the conductor. The independent springs act in the projections 17, they store energy stored by elastic deformation position of the connection during the establishment of the connection and maintain close contact with the conductors to maintain a good electrical way, contact,
also in the case of flow and fatigue phenomena of the metal parts as well as expansion and contraction caused by temperature changes 65 are conditional. The outer sleeve 12 consists of white 1. Metallic connector for electrical lines chem, permanently deformable material, e.g. B. from ge, in particular insulated conductor, consisting of glowed brass. The sawtooth-like seam of the sleeve has two coaxially nested, together- pressed sleeves, of which the inner sleeve with a large number of penetrating the conductor insulation and the conductor wires engaging projections is provided, characterized in, that the projections (17) through an arbitrarily distributed perforation (16) of a thin, hard and resilient sheet metal are formed, each projection (17) from a plurality diverging lobes that the outer sleeve (21) consists of - in comparison to the sleeve (11) - soft and easily deformable, thick material, and that the connector in such a way the entry side of the ladder (14,15) less than at the other end, is compressed that the Connection of the divergent lobes of each protrusion (17) at the entry end without Notch effect on the conductor wire towards the other end, however, is increasingly one in the Conductor wire is engaging. 2. Connector according to claim 1, characterized in that the inner sleeve (11) consists of Phosphor bronze and the outer sleeve (12) made of brass. 3. Connector according to claim 2, characterized in that the inner sleeve (11) has a Has corrosion-resistant coating made of tin. 4. Connector according to one of claims 1 to 3, characterized by its equipment with a additional, per se known outer jacket sleeve (10) made of insulating material. 5. Connector according to one of claims 1 to 4, characterized in that the two sleeves (11,12) and the jacket sleeve made of insulating material (10) have an oval cross-sectional shape and that the outer sleeve (12) has a sawtooth-like longitudinal seam. Considered publications:
German patent specification No. 1 089 028,
1097507; German interpretative document No. 1042 062;
U.S. Patent No. 2,501,870. 1 sheet of drawings 809 628/1354 10.68 © Bundesdruckerei Berlin