DE1512889C - Coordinate multiple switches for telecommunications switching systems - Google Patents

Description

The invention relates to a multiple coordinate switch for telecommunications switching systems Row and column lines crossing each other in a matrix-like manner with several cores in the form of parallel and mutually isolated electrical conductors, at their crosspoints as coupling relays for optional use multi-wire through-connection is arranged in each case with a relay with protective tube contacts, on which joint Electric excitation windings connected to one another and / or extending in columns or rows act. Coordinate to

orderly magnetizable sheet metal strips bewi;

. a magnetic shield and the closure of magnetic flux circuits. Such Koord ten multiple switches are used in increasing IV "instead of the previously used relay or Y rotary selector for the selective connection of Spr and switching or monitoring cores in tele switching systems.

The coordinate multiple switches originally used show a number of serious problems Disadvantage. The structure of this coordinate switch is complicated and in the production expensive. There is a large amount of space required and a large number of I's facing each other in parallel in connection with switching through be ' Kenden coils gives rise to undesirable couplings in such devices. The complicated one Structure, the circuit multiples to be created, multitude of the required soldering points in connection:

with the open contacts originally used, the desired operational reliability is not achieved chen. In particular, the excitation powers of a large number of cases are so high that they on bring special. Precautions are to be taken.

To create a solderless multiple. Share simple shaping of a small number It is known from German Patent No. 1,086,288 to cross each other at right angles made of ferromagnetic material strips to be arranged parallel in groups and you; Isolation strips to separate electrically from each other Hg stand on top of each other and overlap at cross points as contacts. These reeds each are exposed to the free atmosphere and thus also effects of dust or the like, so that Fei Connections and premature failures are to be expected. The structure allows the production of a similarly prefabricated parts by relative.

The individual sheet metal rails are simply stacked one on top of the other, but makes adjustment more difficult Reeds extraordinary, so that the total manufacturing costs are not essential are lowerable. The difficulties with the Justa lead to relatively wide tolerances u: thus to relatively large Kontaktabstandsi in the initial state of the switch tongues. The size Contact distances in connection with the stiff M. material of the stable sheet metal strips cause considerable Excitation performance and amplify accordingly. Stray fields, which directly affect the in the form of Blecl strip provided circuit multiples are able to intervene. According to the strong, for d; Actuation of the contacts required Erregerle stungen are due to the high straightening forces of the scarf tongues, even after the contact has been made, large magnetic fluxes to maintain dt Working position of the switch tongues required, i.e. the excitation of further contacts only at the cross point agitated rows and columns make it difficult and a Ha! th of actuated contacts impossible due to remanence do.

A much more favorable structure results from the German Auslegeschrift 1 160 511 by di Use of pre-adjusted protective tube contacts protected against external influences. The protection Tube contacts are grouped together in packets in terms of the number of wires to be switched through

for their excitation voa surrounded only one coil, which achieves the corresponding absorption of the leakage flux,

in connection with directional conductors the decoding of the so that on the one hand the magnetic flux circles of the

Allocation of the lines determining the selection, the thermowell contacts are largely closed,

cause. The individual sets of the protective tube while on the other hand the circuitry before the

clocks are in front of and over magnetizable sheet metal plate 5 leakage flux and thus induced external voltages

arranged, which mechanically absorbs the sentences remains largely protected.

men and wear them against neighboring coordinates- Through these measures a closer,

shield planes, and which the magnetic structure more compact than. until now. enable without

To at least partially absorb the flow and reverse the transferred external voltages is undesirable

be able to lead. As a result, they reach ver io high values in the magnetic circuit.

However, permanent large clearances are the cause. Due to the low leakage flux it is possible to The need for energy is still undesirably high, and changes in unusual, induced states of excitement arise of the state of excitation affect the condition-maintaining excitation developments, moderately strong stray fields because of undesirable if the magnetically conductive sheet metal strips or deMeasures especially since the circuit multiples in the scattering 15 ren projections made of magnetically semi-hard material rich of the excitation coils are arranged. To increase the remanence exist.

Reduction of the undesired coupling are min- The structure of the multiple coordinate switch

To adhere to the least amount, which is still considered disadvantageous, is greatly simplified if the shielding plate is the

be felt, and the maintenance of the field windings having bobbins carries.

Switch position of actuated protective tube contacts required ao You can also display the entire row and column

Such excitation power is undesirably high and wise take up connection of the windings and

makes it possible to keep actuated contacts by Rema-

nence impossible. are manufactured. Only those are then for final assembly

The teachings of the projections of the electrical conductors by the Durchdeutsche Auslegeschrift 1 194 916 are intended to bring about a further improvement, after breaking the shielding plate, whereupon the coil carriers serving as coil cores simultaneously have free ends with the multiple wiring of one pole, which may be required several of these tests exposed pipe protection contacts of the same magnetizable contacts are to be equipped each time. It has proven itself to be one of the coordinates. By this measure, the free ends of the yoke-like projections for Aufsoll reduced the number of soldering points required 30 would take off the pipe protection contacts,
will. However, since protective tube contacts are each with the details, the features of the invention are often to be connected in the case of the German interpretation hand of the following description of two embodiments with the coil carriers, examples in connection with these illustrative does not result in any savings . There, if any drawings are explained. It shows here
shielding is provided, this one coordinate 35 Fig. 1 schematically engages below the current flow of a coordinate plane, are within the plane ten multiple switches,

no shielding made; since the coil Fig. 2 schematically a protective tube contact the carrier at the same time the multiple wiring, so both F ig. 1 with components acting on it,
for example speech arteries are, is such a fig. 3 in perspective, the formation of a cross shield is also not possible at all, and the interference voltages induced by the 40 point (coupling point) in two-wire line individual coils,.
get up. Here, too, the required figures remain. 4 pulled apart another training excitation power undesirably high, and the coupling of a cross point (coupling point),
Pelling options are an effective way of reducing F i g. 5 broken in different levels contrary to the tion of the dimensions. 45 Top view of a multiple coordinate switch

The invention is based on the task of one and

Coordinate multiple switch of the designated gate F ig. 6 to create the partially broken side view device, the multi-coordinate switch of FIG. 5 with low manufacturing codes.
most are characterized by low leakage flux, so, In F i g. 1 is a schematic representation of additional coordinates, even with a considerable reduction in the outer 50 compartment counters, the basic dimensions of which ensure interference-free transmission in the Bell System Technical Journal, Vol. No. 5, is described: two or more windings are dispensed with and the maintenance-medium-hard magnetic cores are connected in parallel with one or more selectively brought about working positions of ■ ren protective tube contacts; the Kon protective tube contacts can be brought about by remanence. 55 cycles of the protective tube contacts are

This problem is solved by the known tion of the magnetization direction of the magnetic cores

Way, the electrical conductors forming the multiple are opened or closed. .

at the same time as magnetically conductive, in the area of every In F i g. 1 are row lines 1, 2 and so on up to

Cross point each having a lateral projection η-th line and column lines, lines 3, 4

Send sheet metal strips are formed and the front 60 etc. up to the m-th line are shown. Respectively

Jumps out of the plane of the matrix in a pole-like manner, perpendicular to crosspoints (crosspoints) from which the figure

are performed, with openings showing one of the nine, are protective tube contacts, for example

Levels of the conductors overlapping magnetizable protective tube contact 5, shown, which the intersecting

Reach through the shielding plate and by bridging the lines. Lines 1 to 4

Exciter windings assigned to projections on 65 and the supply lines extending from them are

the side of the shielding away from the conductors not only electrically but also magnetically

plate are arranged. This creates an extensive material, the leads are as

running and almost perfect shielding and the projections 6 and 7 carried out, and at least the

Vprsprungeö and 7 consist of magnetically semi-hard material, i. H. Material of a given Minimum retirement.

The projections 6 and 7 of all cross points (coupling points) are each with excitation windings 8 to Il equipped by oblique, running lines are indicated; two parallel lines mean twice the number of turns. The individual excitation developments are connected in series within the matrix 17 to form rows or columns. The top The line shown of the excitation windings, beginning with excitation windings 10 and 9, is through the Excitation line 12 connected to each other, while the leftmost column of excitation windings, starting with the excitation windings 8 and 11, through the excitation line 13 in series is switched. The selection of the excitation lines assigned to the rows to be actuated is effected by the line selector switch 14, to which the excitation line 12 also leads, while the Selection of the excitation line determining the column. is determined by the group selector switch 15. The excitation lines responsible for the row therefore all start at the common conductor 16 and end on the line selector switch 14, while the excitation lines determining the column of common Lead conductor 16 to group selector switch 15. The excitation windings work on the principle of Differential excitation and allow actuation and, in conjunction with the remanent material, holding and releasing connections of conductors 1 or 2 or 4 at any desired intersection (Crosspoint) of the matrix 17.

The actuation of the protective tube contacts is illustrated in FIG. 2 explains which represents a protective tube contact and the elements required for its actuation, which together form a coupling relay. Even if the designations of the in the matrix 17 of FIG Coupling relays shown at the top left are taken over, so the illustration of FIG. 2 applies to all Coupling relay of the matrix. The overall winding belonging to the row is on the projections 6 and 7 arranged excitation windings 9 and 10 divided, the number of turns in the ratio 1: 2. The total winding belonging to the column is divided into excitation windings 8 and 11 The number of turns is in a ratio of 2: 1.

The in F i g. The elements shown in FIG. 2 represent a coupling relay 18 with an almost closed magnetic path. The projection 6 is made in one piece with the line 1 or, as shown in FIG. 3 will be shown associated with this. Above the conductor 1 is the conductor 3, which in turn is made in one piece with the projection 7, crossing a relatively large area and only separated at a short distance by insulation. The free ends of the protective tube contacts are in turn connected to the projections 6 and 7. So there is only one air gap between the crossing conductors 1 and 3, which is large and short, and the working gap between the contacts of the protective tube contact 5. Now, within this practically closed magnetic circuit, the projections 6 and 7 are magnetized in such a way that one within If remanence of the circle remains in the same direction, a magnetic flux is also produced, which keeps the protective tube contact 5 closed. The remanences are shown by solid arrows. If, on the other hand, the remanence of the opposite sense is indicated by the dashed arrows, the magnetic flux decreases towards 0, and the ί pipe contact 5 opens. To close the tube contact 5 of FIG. 1, currents are impressed by de selection switch 14 of exciter line 12 and group selector switch 15 of exciter line, which in the coupling relay on the left, coupling relay 18 of matrix 17, cause Ren zen, which correspond to the solid arrow Fig. 2 and cause the protective tube co * to respond. Due to the different excitation of the other coupling relays in the same row and in the same column, opposite remanences are caused, their contacts open and only the coupling relays a clear connection between Le ^: and 3. Due to the largely closed magnetic circuit, which when using a Absi plate between the conductors 1 and 3 has an even more effective air gap, 1 is aimed at low excitation remanence, which allow the contacts to be held after Ko conclusion.

A possible practical implementation of a pel relay of a matrix is shown in FIG. 3 shown. Corresponding to two du: switching lines, for example speaking a telephone connection, Dc conductors are used, which consist of individual conductors 1 c 1 b or 3 α and 3 b and are electrically insulated from each other by insulating layers 19 'crossing points of the two conductor groups and 3 are these against each other electrically isolated from each other by a we insulating piece 20 insulating layers and pieces of insulation have a nu ring height, so that despite electrical insulation through a large, only short gap, a slight interruption of the magnetic circuit: is effective. The ladder la, Ib, 3a and 3 6 have Weil at the crosspoints (crosspoints) I lateral approaches that with separate vor; gen 6 a to Tb are connected. The multi-stage production allows for the conductors -electrically, magnetically conductive, magnetically soft Ma. to use; only the projections 6a to Ib b hen made of magnetically semi-hard material and li <the respective remanence. It is not necessary to assign the windings own to the projections; the windings can be combined to form a common coil that encompasses projections that correspond to one another. A we execution of the coupling relay at the Kreuzstelle shown in Figure 4: Parts of the same function here again with the same reference numbers. The two conductors 1 α and 1 b or 3 α required for the two-wire transmission are not arranged above each other, but rather spaced apart, and they are made in pieces from material that not only conducts e trically and magnetically, but also at the same time is retentive. As a result, the number of individual parts is reduced and their structure is simplified, so that the manufacturing costs can be reduced even further. In the exploded view, the assembly is carried out using thin layers of insulation

7 8

the conductors 1 α overlying magnetizable Ab- emerges. Devices constructed in this way are shown faceplate 21 over the strip. Using a clamping device 28, you have perforations 22 through which the measure F i g. 6 clamped together, and mechani-tongues 6 a to Tb of the ladder can be guided. These see closure and protection as well as tongues for shielding continue to reach through via the opening 5 against adjacent matrices is a bobbin 23 which is arranged on the base tongues and which receive exciter windings 8 to 11 covering the surface and also the side surfaces. Placed over this cover plate 29.

the protective tube contacts 5 a and 5 b are shown. With the achievable good magnetic return

After assembly, this shielding plate is circuit, it has been proven to build the

21 made of magnetically soft material the conductors 1 io coordinate multiple switch protective tube contacts

and 3 to use electrically insulated with such a short distance, their mutually facing ends

opposite that it connects this magnetically and over, for example, a quarter of the length only the

acts as a magnetic yoke for the projections 6 and 7. half the cross-section of the remaining length range

The conductors will thus exhibit opposite of the excitation. The magnetic excitation can be

side induced interference voltages shielded. 15 will measure that in the initial state no transverse

The practical construction of a matrix is based on the contact area where the contacts are magnetically saturated,

Hand of fig. 5 and 6, of which the minor after closing the contacts

F i g. 5 is a plan view and FIG. 6 a side edge can be saturated in some areas in order to

view shows, both of which can be obtained in sections except for inconsistent contact force,

different depths are cut. 20 The teachings of the invention permit construction

As can be seen from FIG. 5, part E and FIG. 6, part C of coordinate multiple switches, the excitation windings are the exciter windings which require only a very small selection of a cross point (coupling point) of the maximum excitation power to exclude magnetic yoke . The far-driven Abtrix are used to shield the bobbins 24 and 25 and to raise the exciter windings so that the differential rotations described above can be brought about from the plane in which the multiple switches are formed and a winding ratio of the conductors results in low leakage fluxes, which in the for example 2/1 or 1: 2 is observed. Together with the already low excitation power, Fig. 6, Part E , the lines representing the lines result in a low stray voltage level, the excitation windings 26 are connected in series, and a shielding plate between their terminals is connected to the common 30 conductors and Excitation windings in addition to the beLeiter 16 connected, while the other knew at one, the entire coordinate multiple scarf pole of the line selector switch 14 of FIG. 1 adjacent enclosing shielding walls is still closed. The excitation winding 27 can increase the excitation considerably. The low noise voltages of the columns are, as shown in FIG. 5, part G and F i g. 6, level allows the individual switching elements we-Teili? emerges to shrink a column of the Erregerwick- 35 considerably more than it was previously usual lungs 26 wound. These excitation windings are also connected in series, so that an excellent use of space is made, and one of their connection is sufficient.

clamp is connected to the common conductor 16. The simple structure and the possibility of denying, while the other on one pole of the group next the coils on the shielding plate selector switch 15 of FIG. 1 is connected. After 40 building and wiring, then inserting the conductors-completion of the winding work, the fronts, and finally the protective tube contacts with the cracks 6 a, 6 b and 7 a, 7 b after inserting and connecting projections, allow a simple bend with the terminals of the protective tube connector and thus cheap and interference largely connected to clocks 5, such as this from FIG. 6, part C closing assembly.

1 sheet of drawings

Claims (4)

Patent claims: 1. Coordinate multiple switches for telecommunications switching systems with row and column lines crossing one another in a matrix-like manner with several cores in the form of parallel and mutual isolated electrical conductor, at their crosspoints as a coupling relay for optional multi-core Through-connection each a relay with protective tube contacts is arranged, with this jointly acting, connected to one another in columns or rows and / or extending electrical excitation windings and coordinated, a magnetic one Shielding as well as the closing of magnetic final circuits causing magnetizable Sheet metal strips, characterized in that a) in a known manner the electrical conductors (1,3 in Fig. 2, la, Ib, la, Ib in Fig. 3 and 4) at the same time as the magnetically conductive, in the area of each intersection with a lateral projection (6.7 ) having sheet metal strips are formed that b) the projections (6.7 in FIG. 2, 6a, 6b, Ta, 7b in FIG. 3 and 4) are bent out of the plane of the matrix in a pole-like manner, and that c) the levels of the conductors covering a magnetizable one Shielding plate (21) .with openings (22) through which the projections reach, provided in this way is that the excitation windings assigned to the projections (8 to 11 in FIG. 1 and 2, 23 to 25 in FIG. 4 to 6) on the side of the shielding 'facing away from the conductors plate are arranged. 2. Coordinate multiple switch according to claim 1, characterized in that the magnetic conductive sheet metal strips made of magnetically semi-hard material of high remanence. 3. Coordinate multiple switch according to claims 1 or 2, characterized in that the shielding plate (21) the coil formers (23 to 25 in FIG. 4 to 6). 4. Coordinate multiple switch according to claims I to 3, characterized in that the free ends of the yoke-like projections (6 a to Tb in Figure 4) are angled to accommodate the protective tube contacts (5).