DE1060912B - Winding device with electrically conductive return springs for connection cords in telecommunications, in particular telephone switching systems - Google Patents

Description

. german

KL.21a2 23/05

INTERNATIONAL cl. H 04 St

patent office

D26854VIIIa/21a ²

AWIHE DATE: NOVEMBER 18, 1957

NOTICE

THE REGISTRATION

AND OUTPUT OF "

ADS LEGE WRITING: 9, J U LI 1 9 5 9

The invention relates to a winding device with electrically conductive return springs for connecting cords in telecommunications, in particular telephone exchanges.

Unwinding devices for plug cords are already known, in which one part of the roll the stopper cord un<£,. picks up the return spring, while .on the other part one with the cord by a connector .verbundenes ribbon cable so loosely wound up that when winding and "unwinding the cord joins the ribbon cable in a sort of a Coil spring expands or contracts. These devices require not only in diameter but, since the cord andVffas ribbon cables side by side are arranged, -auc:hj.fruder -thickness proportionate lots of space. ". . * ^V" ].,'· ■ - ■

Furthermore, devices for rolling up cords of electrical apparatus with a multi-core current-supplying winding spring arranged in a different plane from the cord roller are known, in which "one of the disc-shaped mantle surfaces" of the coil iirf & rrolle with at least one of the diameter de / ^ & binding cord corresponding radial slot yer£.en, which extends from the bottom of the groove to the RoHeumfaiig and the passage of the cord --iiudie ^chnuEr'iifen·. enables:- Here the "Ruckrioltede'r is used for the power supply, so that a special ribbon cable, as used in the aforementioned device, _is saved, but -has '•aacK.dje.ß^YoiTichtuiig -npch. -roughly the same thickness" as the "first mentioned. ■ -

In another "known device, a telephone cord is unwound and wound along the slot of a can which un^gteijifejiisfe^ into different rooms one of which is used for winding and unrolling the cord, the other for compensating windings contains, while in a third partitioned space the drive links for retrieving the unwound cord are accommodated. Quite apart from the fact that the compensating windings by permanent Changes in position in opposite directions are subject to buckling, which after leads to breakage of the wires combined in the cord for a shorter or longer period of time is the device built in its entirety so spacious that it can not be used where it is to save space and crowded construction arrives. The latter also applies to another well-known facility to, in which a cord, guided over guide rollers, up and down on several adjacent drums can be processed, even if here, which should not offset the disadvantage of the spaciousness, Kinks in the cord are avoided.

Finally, there are take-up devices for take-up devices

with electrically conductive return springs

for connecting cords in telecommunications,

in particular telephone

switching systems

Applicant:

German Telephone Works
and cable industry joint-stock company,
:. , Berlin SO 36, Zeughofstrasse 4-11 _r ,

-'- Br.-I-ng. Wolfgang Krüger, "Berlin-Länkwitz,
and Walter Köhler, Berlin-Wilmersdorf,
have been named as inventors' .,

Connection cable electrical devices known-where in the housing qine -rotatable. "Drum to Winding the. cablesr a return spring for the

j _i4 cables and devices vzunx, Spßrcen des"-out-

3*o pulled cable, lsr the· on the Trfpimel s^er-.jmijHttelbar on the,. Kabel-s@.lb%:ein.wir4sen _r .are .provided: Inside the drum and coaxially to it is min-

at least one turn of the cable housed in such a way -that l ate Xp£>mmel is rotatable, although the cable end attached to the housing. In one form of training of this device, the winding of the cable inside the drum is on one Role, which is firmly connected to the housing, wound up in such a way that its winding direction of the Winding of the drum is opposite. This arrangement has the disadvantage that the cord on Kinking is claimed because a reverse movement of the cord takes place within the housing. In another embodiment of the device mentioned, that defect of buckling is avoided, by eliminating the inner pulley and winding the cable in parallel with the spring becomes. But also this construction, like the aforementioned one, requires a large take-up roll Diameter.

The invention provides a winding device that does not have the disadvantages of the known devices having. It takes up only about a third of the space of most of the features mentioned.

.. . 909 560/291

directions, mainly with regard to the thickness of the reel body, and is particularly for portable To use telephone exchanges with advantage. This progress has been achieved that the rotating body of the take-up roll of two with an insulating disc as an intermediate layer with each other connected symmetrical parts, each enclosing a return spring, with one end on the spring cores that are in conductive connection with the fixed connection lugs and on the others Ends are attached to the connection ends for the cord at the groove bottom of the rotary body.

In the drawing, a take-up roll is strong as an embodiment of the subject invention shown enlarged from the front (Fig. 1) and from the side (Fig. 2).

The body of rotation of the roller consists of two symmetrical parts d1, d2 made of insulating material , of which the upper one is shown in section in fig. 1 and the lower one in elevation. Brackets h 1 , h 2 are stationarily mounted on both sides of the rotating body, which are firmly connected (bolted) to the spring cores f and the connecting lugs al, bl for the wires of the incoming line. At the same time, the spring cores form the axle stumps around which the rotating body of the roller moves. In each of the two parts of the rotary body there is a cylindrical cavity for receiving a return spring c, which are made of a material with good electrical conductivity (preferably non-ferrous metal). The inner ends of the springs c are screwed to the spring cores f or clamped or hooked to ensure contact. The outer ends of the springs are brought through a slot m in the cylinder jacket to the connection points a, b, which are in each part of the rotary body in a recess in the bottom of the groove, and fastened to them in such a way that they connect to the outgoing from here cores of the cord form perfect contact points. From the connection lugs a1, b1 there is thus a good electrical connection via screw, innerspring, spring to the connection points a, b.

After the springs have been inserted, the two parts of the rotating body are firmly connected (screwed) with the interposition of an insulating washer, which means that the rotating body is ready for use. The insulating disk e is expediently connected to a circumference at its periphery

provided hook-shaped extension g , to which the inner end of the connecting cord is attached by means of a loop, so that in this way a strain relief for the contact points c and b is achieved. In order to make the hook accessible, the rotary body parts have recesses k in the vicinity of the hook.

When pulling off the cord, not shown, the two springs stretch in a known manner, ίο so that when released, the cord is wound onto the reel body by spring force.

Claims (3)

Patent Claims: 1. Winding device with electrically conductive return springs for connection cords in telecommunications systems, in particular telephone exchanges, characterized in that the rotary body of the winding reel consists of two symmetrical parts {dl, d2) connected to one another with an insulating disk (e) as an intermediate layer, each of which has a return spring ( c) enclose, with one end on the spring cores (f) which are in conductive connection with the fixed connection lugs (a I ₁ b 1) and with the other ends on the connection points {a, b) for the cord on the grooved bottom of the rotating body are attached. 2. Winding device according to claim 1, characterized in that the roll halves are designed as bodies with cylindrical cavities for receiving a spring core (/) and a spiral spring (c) attached thereto, which can be connected to the connection points through a slot (m) in the cylinder jacket (a, b) are introduced for the cord. ■ 3. Winding device according to claim 1, characterized in that the roll halves have recesses (k) , in which the interposed insulating disk (e) is designed as a hook (g) in order to achieve strain relief with the aid of a loop attached to the cord. Papers considered:
German Patent Specification No. 874,021;
U.S. Patent No. 2,211,561. 1 sheet of drawings