DE1800156A1 - Electrical cross switch - Google Patents

Description

OipMng. August Bosharf. Dipl.-lng. Walter Jackisch 1800 156 Patent attorney *

t 1968

Western Bläktrio Company Incorporated 195 Broadway, t * w York IOOO7 USA

A J5O 702 - az

Electrical cross switch

The invention relates to an electrical crossbar switch with a contact spring set Crosspoint arrangement and with a plurality of switching devices each assigned to a crosspoint row and selection devices, furthermore with a plurality of preferably U-shaped, the contact spring sets assigned dial fingers and a corresponding plurality of intended for contact actuation Switching webs, with each selector having a plurality of actuation selectively acting on the selector fingers has members, which are provided for transferring the selector fingers into their operative position with respect to the associated switching webs. The function of such The crossbar consists essentially of

009810/0763

the selective connection of one or more Lines two line multiples. The connection takes place in so-called coupling points, which e.g. each have a contact spring set with a contact spring for an associated line of a multiple is formed are «while a corresponding line of the other multiple via a contact rail or the like. Optional with the same type of contact springs of a series of coupling points »ss.B. a row of crosspoints, in a matrix-shaped crosspoint arrangement, in connection , can kick. Such by one or, several contact bars s combined series of Crosspoints or contact set «! is at usual Coordinate switches of a common (cell) Switching device assigned, weloh @ the · contact actuation executes, i.e. the contact springs of a contact spring set with "d.eii associated contact slots

how
brings in touch. Weis ^ / füy Zwe ^ im d © r FernspreehansohluSteehnik usual, only one coupling point of a (line) coupling point row, ie only one of the contact spring sets assigned to a switching device, is to be actuated when the switching device in question is activated, is a corresponding selection control with the help of a

9 0 9819/0763

^: '■■■■ "■■ ■' ^! ■"' ^! in

A plurality of selection devices are provided, each of which has the first-mentioned (line) crosspoint rows assigned to crossing (column) coupling lines is. A crosspoint to be switched through is determined by activating that pair of mutually perpendicular rows of crosspoints (columns and cells) or of dialing devices and switching devices, at the intersection of which the crosspoint in question is located. Furthermore, this is for everyone Coupling a Yoz view required, which the actuation of the relevant contact spring set by the associated (line) switching device only after prior control or conversion of the associated (column) selection device become effective leaves. In the present case, this device consists essentially of crossbar switches from a so-called dialing finger, also called "Bferkierfeder", which is a coupling element between the switching device and one of the contact springs of the relevant Contact spring set directly actuating switch web adjustable is inserted. Of the . > Whale inger takes at rest. one: disengaged position β / «, in which the actuation of the switching device has no effect on the. k / öHifinger belonging

909819/0763 " ⁴ "

Shift bridge remains. By previously actuating the corresponding dialing device, the dialing finger on the other hand, brought the former into its clutch position via a corresponding actuator and transmits a subsequent actuation of the switching device to the switching bridge.

The selection devices and switching devices are usually controlled and actuated electromagnetically, for which purpose corresponding selection and switching magnets are provided. According to the raatrix-shaped crosspoint arrangement, the selection and. So holding devices extend over the corresponding rows of coupling points (columns or rows) on actuating members, which are generally designed as rails or the like which can be longitudinally displaced or pivoted about their longitudinal axis. The actuators of the selectors in conventional designs often "Stangeri · those of the switching devices as""means. For the shifting movement of the contact springs causing switching bridge is also the designation is doing ¹¹ Contact bet äfcigungssteg" Will short as bridges ♦ The terms used in the present context break away from the

-5-909819 / 0763 *

mentioned «special constructive designations and are in obvious connection with the. Basic functions of the elements concerned.

Coordinate switches of the type mentioned are used to a large extent in the telephone connection technology. There is therefore a need to continuously improve these switches in terms of operational safety, Lifespan and maintenance effort as well as with regard to the space requirement, not least with regard to the construction costs. The object of the invention is Creation of a crossbar, which is easy to construct and a design that is easy to manufacture of its elements and a compact design without impairing operational safety reduced space requirement. The invention The solution to this problem is characterized by a crossbar of the type mentioned at the beginning mainly by the fact that each switch web has one an arm of a selector finger cooperating recess and a plurality of associated contact springs Crosspoint receiving openings that the Scheltel sections of the selector fingers pivotably mounted in the area of the associated switching devices

909819/0763

are and that each arm of a selector finger engages in a recess of a switching web and on this switch web exerts a biasing force acting in two directions. The dialing fingers are here preferably carried out in the catfish that everyone Arm of a dial finger one in two directions

- has ineffective preload forming. Special structural advantages result according to a certain embodiment of the invention Coordinate switch in such a way that "a frame carrying the switching and selection device" a plurality of threaded holes with on both Slots arranged on the sides for the attachment of provided for driving the dialing devices Has selector magnet is provided.

Further features and advantages of the invention emerge from the following description of an exemplary embodiment which is illustrated in the drawings is. Herein shows

Fig. 1 is a front view of a frame housed coordinate holder according to the invention,

909819/0763

ill: HjPhHj:: :: ί- ^ ¹ I! ¹ ;! ';"'■■■. ■ i :!«! ¹ ) !!': »!!!!] ¹¹ ! '''·Ι'

2 shows the front view of a switching device with associated contact rails as fixed contacts and an associated series of contact spring sets in larger eras Scale,

FIG. 3 is a side view of that shown in FIG Switch part, namely according to the direction of view 3-2 in Fig. 2,

FIG. 4 shows a partial top view of the switch part according to the viewing direction 4-4 in FIG. J5,

Flg. 5 a perspective view of the switch part according to FIGS. 2 and 5, looking diagonally from the front and below,

6 shows an enlarged section of the

Switch part with two switch bars with associated components in perspective representation,

Fig. 7 a stop element for limiting the Anchor movement of a switching magnet in a perspective view,

909819/0763

-en
Flg. 8 @ in / U-f8rmig®n dial finger, also

In a perspective view,

Flg. 9 is a side view of the dial finger according to FIG. Q ₁

10 shows a perspective illustration of the coil former of a wafer magnet,

Flg. 11 the rare view of a Wählmagneien w in partial section and

Flg. Figure 12 is a side view of the crossbar with frame according to Flg. 1.

In the in Flg. 1 frame 21 of the crossbar, a plurality of Sehaltvorrlehtungen and selection devices 100 are housed and fixed in their mutual position caused by the mode of operation *. The frame consists of cross members 22 and seldom members 22, which have hurry openings 25 distributed vertically for holding the Sahali devices, while the dialing devices 100 are attached to the cross members 22, 24. As from Fig. 1 and

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As can be seen, the cross members have a section 26 provided with adjusting screws 27 and a section 28 provided with slots 29 and threaded bores 20. These elements are used to hold and adjust the position of the selection devices 100. Holes 21 in the cross members are provided for fastening the frame in a larger switch bank or the like.

The structure of a switching device 40 is shown in FIGS. 2 to 5. Specifically, here are one Switching drive unit 41, a movable contact arrangement 42 and a fixed contact arrangement 4j5 indicated, which each form a subassembly. The contact arrangements 42 and 42 act in the introduction explained way together, the movable contact arrangement from a plurality of one each Crosspoint forming Koift-fcaktrfecteVsatzen 76 and the Fixed contact arrangement from one of the number of contact spring pairs within each contact spring Set corresponding plurality of contact bars 92 is made. So is within a crosspoint each associated with a contact spring pair of a contact rail. These contact arrangements form a total of one of the relevant switching device

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assigned crosspoint line.

As can be seen from Fig. 5, the gearshift drive comprises a unit 4l the Schaltmagefcrfcen 47 with anchor 48 and Stop element 49 to limit the armature movement. These parts are along with a plurality of U-shaped, i.e. two-armed dial fingers 5i assigned to the illustrated row of crosspoints attached to a support plate 46. The Wählöiger 51 are with the help of pins 50 to the plate plane mounted so that it can be swiveled in parallel. Di® support plate has two lateral rabbits 52, which in the locking openings 25, (Fig. 1) of the frame 21 intervene, while two protruding tabs 55 of the support plate serve to fasten the fixed contact arrangement 45. Furthermore, openings 54 are in the support plate for the still to be explained attachment of the movable Contact arrangement 42 is provided.

As can be seen from Fig. 3, the switching magnet 47 and the stop element are on opposite sides

Support sides of the plate 46 are attached and they close one Section of the anchor 48 between them. Of the Sohaltmagnet is of the usual design

- Il 0 0Θ-.8-1 8 / Q78-d

Magnetic core 56 and winding 57

Oemäss Flg. 5, the armature 48 comprises two flat plate portions 58 and 59> to each other are arranged at an obtuse angle. The sheet metal section 58 lies between the stop element 49 and the magnetic core 56. The armature consists of a suitable magnetic material such as low carbon steel and sits at one end with a corresponding incision pivotably on a nose 52 of the support plate. The armature further comprises a narrow "strip-shaped \ portion 6l on" which overlaps the Wählfingeranordnung and the carrier plate leads to the pivot support of the armature of the (in Fig. 5) right lug 52. A push button 6O made of plastic is inserted into the bleoh section 59 of the anchor. An acetate resin, for example, can be considered as a suitable plastic. Oem According to Fig, 4 is also eiae ss.B. A return spring 64 made of nickel silver is provided, which is fastened to the support plate at one end by a snap connection and engages the armature 48 at the other end via the push button 60, whereby the latter is held in its rest position. If necessary, the return spring 64 can also

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909819/0783

Normally closed contacts to display the pull-in movement of the Anchor.

As can be seen from FIGS. 4 to 6, the armature 48 rotates between the magnetic core 56 and the stop element 49, which the latter secures the position of the Anchor effects and limits anchor movement «, Ctemäss Pig. 7 If the soleplate element 49 is designed as a sheet metal part and has two arms 65 »66 and one to

Fastening serving elongated hole 67 and a similar one Slot 68. According to FIG. 4, the support plate 46 has a threaded bore 70 and a pin 71 provided »which together with a head screw 72 in which can be easily understood from the illustration Catfish for fastening the stop element 49 to serve the support plate.

Securing the position and limiting movement of the anchor P is established by the arms 65 and 66 of the stop element 49 causes. To change the armature stroke, the head screw 72 is loosened and the stop element with it The elongated hole 67 is pivoted about the pin 71. When the arm 65 approaches the armature, it is reduced its hub and vice versa. The position security

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909819/076 3

arm 66 is not affected by this. As can be seen from FIG. 7, the arm 66 lies radially to the one engaging in the slot 68 Pin 71, so that the distance between this arm and the armature changes only slightly when the support element is pivoted before the position of the army 65 changes with a corresponding stroke adjustment.

5 as seen from FIG. 74 of the loop-wound Sapfen sit apex portions of the select finger i in circumferential grooves 72 50. The two arms 73 of the U-shaped comprise the selecting finger of FIG. 8 and 9 on Vorspannungsverformung apparent. The free end sections of the selector finger arms are angled towards each other according to Fig. 8, while the arms are angled slightly over their entire length in the manner shown in FIG. This double pretensioning deformation of the selector fingers serves to align the arms 73 with other components and makes it easier to assemble the switching drive unit 4l and the contact arrangement

909 819/076 3

The structure of the last-mentioned contact arrangement can be seen in particular from Fig. 3. Each coupling point comprises a contact spring set consisting of two-armed contact springs 82 and return springs 78-79 * Sohaltsteg 77 and are with ζ.3. Contact elements 110 made of palladium are provided. DI® Contact · »springs themselves are made of a suitable spring» * material such as a Kup he £ "HiQkellegi®rung and are angled for generating bias voltage in a common Kiohfcmig or deformed in some other WEIS®" The contact springs are made of plastic, for example, _f in a Phenolic resin-existing holding body 81 is embedded and with this blook held together to form a durots a clamp 80 on "inandergesohi @ htet".

The holding webs 77 shown in FIG. 6 are also made of plastic _s ζ "Β"

a super polyamide, and are provided with openings 86 for the contact springs BS and with recesses 8§ for the penetration j © @ in® @ arms 7? the selector finger 51 provides "each slialtst ^ g unites the contact spring". a® @ contact fe $ ®r®at »s

909819/0763

with the associated dial finger arm. The openings 86 have a lower, wider section as well as an upper, narrower section and each with a tongue 88 subdivided section. In this way, two grooves are formed in each opening 86 in FIG each of which has a contact spring 82. When resting on the upper end of the grooves, the two contact springs are at the same height.

In the example, each switch web has six openings

',', 86 on what a crosspoint version with each corresponds to six contact pairs for switching through six lines. By using switching webs with a different number of openings 86 an adaptation for different numbers of lines and crosspoint designs can be achieved in a simple manner.

The recesses 85 for receiving the selector finger arm

have a flatter section 89 and an I.

-f etie ^ en section 90 on “what else to do explanatory mode of operation of the dialing devices is important. According to FIG. 6, two in each case Switching webs 77 formed and arranged in mirror image to one another and arranged next to one another cooperate with the arms 75 of a dial finger.

909819/07 6 3 " _l6

In the position according to FIG. 2, the sliding support arms are under the action of iixrer bias on the adjacent rare edges of the recesses 85 * so that constant contact and friction between the dial finger arms and the associated Sehaltstegen consists »whereby the free movement of the selector finger arms is slowed down. Due to the double Vorspazinuiigsverforaung the selector finger arms are also in one common plane on the strip-shaped section 6l of the armature 60 and can thus teira assemble ™ the device without difficulty in the Introduce recesses 85 of the switching webs.

Each switch bar 77 is fastened in an upright position between the ends of the two return springs 78 and 79 already mentioned. The upper return spring 78 is locked with a recess on a nook-shaped connection nut 87 of the associated switching web, while the lower return spring 78 h engages in one of the openings 86. As can be seen from FIG. 6, incisions 112 are provided on the side edges of the end section of the lower return spring 79, into which corresponding projections HJ of the opening 86 provided for receiving this return spring engage

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Sohaltsteg is thus secured against lateral displacement between the associated return springs and guided movably in the longitudinal direction by the spring movement. In the catfish shown in FIG. 3, the return springs are provided with a prestressing deformation directed against the support plate 46 and are clamped at their rear ends together with the associated contact spring set in the clamp 80. These clamps, which, like the return springs, are made of a suitable spring material such as a nickel-silver alloy, form hooks 91 on their free leg ends which snap into the openings 54 of the fragile plate 46.

The fixed contact arrangement 4j5 shown in FIG. 2 comprises the already mentioned contact rails 93, each of which is assigned to a horizontal row of contact springs 82 and is provided with contact elements 92 i for the corresponding contact elements 110 of the contact springs. The contact soles, for example made of a nickel-silver alloy, are inserted parallel to one another and at a mutual distance in support blocks 94 on both sides,

909819/0763 - 18 -

which are expediently made of a plastic such as polystyrene or the like. The ends of the contact rails 93 reach through these support blocks and serve as Connection elements for the rope lines to be held through. The ends of the contact rails are bent for connection purposes. For the contact elements 92 Palladium, for example, can again be considered as a material.

In the rest state, the contact springs 82 of the movable contact arrangement 42 are due to their own deformation biased in the direction against the contact elements 92, so that without any other action Contact with a given contact pressure between the contact elements 92 and 110 consists. Through the oppositely directed, predominantly pre-tensioning force the return springs 78 and 79 are the contact springs 82 However, in the idle state of the device downwards in the direction towards the strip-shaped section 6l of the armature 48 is deformed so that the contact elements 110 are separated from the contact elements 92 are lifted off and separated by an air gap. In the example, there are working contacts with so-called indirect contact actuation.

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The support blocks 94 of the fixed contact assembly are by means of two clamps 95, also made of a nickel * silver alloy, on the Support plate 46 attached. The top of each support block is in one with a pin 96 corresponding recess of the associated bracket 95 locked. Form the leg ends of the brackets Hooks 97 »which engage in corresponding holes in the lugs 53 of the support plate. By using the U-shaped brackets 95 and 8O are used to hold the fixed and movable contact / assemblies, respectively the production »assembly and maintenance of the switch is significantly simplified and facilitated. For example the contact arrangements can be prefabricated as assemblies and then simply clicked into place the resilient clips with the associated holding elements are attached to the support plate of the switching drive unit. In the event of contact faults or other operational faults, the contact arrangements are exchanged in a simple manner.

Furthermore, the assemblies can be combined in this way with the various assemblies Switching devices 4o in einfoher catfish on the frame attach and for repair or conversion purposes of

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remove this. This is besides the already mentioned rabbits 52 of the support plate 46 on each Switching device 40 has at least one third fastening point in the form of one from FIG. 5 apparent loop 98 of the support plate 46 with a At this point, the support plate is also attached to the frame 21 screwed up. .

The in Flg. 1 illustrated dialing devices 100, each of which is assigned to a vertical column of the crosspoint arrangement. The switching devices extend overall over the height of the frame 21 and are attached to the cross members 23 and 24. Each selector has a selector rail 102 extending over the height of the coupling point arrangement, pivotable about its longitudinal axis between the adjusting screws 27, and a drive unit consisting in the example of two selector magnets 101 acting in opposite directions.

Each selector magnet includes in the from Flg. 11 catfish shown have a magnetic core 104 with a bobbin 103 and winding 105 · The e.g. made of magnetically soft

90i3 19/0763 " ^{ai m}

Iron existing magnetic core is at one end provided with a threaded section, which is in a corresponding threaded hole of the relevant Cross member 2? or 24 is screwed in. Of the The bobbin shown in Fig. 10 has a for the implementation of the connecting wires for the winding radially slotted flange 106 engaging in corresponding slots 29 of a cross member section 28 Locking lugs 107 on. The threaded portion of the magnetic core 104 is made with the help of a transverse socket in the manner shown in FIG. 11 is screwed into a threaded hole j $ 0 of the cross member section 28 and secured by a lock nut. The other end of the magnetic core is provided with a head, so that the coil body by screwing in the magnet core against the cross member section 28 is being held.

over the length of the torsion stiff. and For example, selector rails consisting of stainless steel are distributed among actuating members 108 for the selector fingers 51 of an associated column of the coupling point arrangement. At one end of each

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909819/0763

In addition, an armature plate 109 is fastened to the selector rail and protrudes on both sides of the selector rail and alternately interacts with the associated selector magnets 101 or assumes a neutral central position. In this middle position, the sections β »τ armature plate on both sides form an air gap with the magnetic cores 104 of the associated selection magnets. The air gap width can be set in a simple manner by screwing the magnet cores more or less deeply into the threaded bores JO of the cross member leaning 28. The middle position of the anchor plate !! or “selector rails, and thus also the operating mechanism 108, is maintained when the selector magnet is not energized by return springs (not shown). By alternately exciting the Wihlütagnete the selector rails are transferred into the corresponding opposite swivel positions.

Each of the actuators 108 of a selector rail 1st in the from Flg. 6 apparent way aiit a widened end section which between the arms 75 of an associated dial finger 51 intervenes. As a result, the transfer the selector rail and thus the one on it

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909819/0763

rigidly attached actuators 108 in the one or another pivot position of one of the two selector finger arms 73 from the area of the The lower section 90 of the associated recess 85 is adjusted in the shallower section 89 thereof. Zn this clutch position of the selector finger is the relevant vertical row of switching webs 77 for a soleless switching process under the Effect of an associated switching device 40 prepared.

The double pre-tensioning of the selector fingers 51 facilitates assembly of the switching devices 4o and selection devices 10O throughout Coordinate switch 20 (Fig. 1) by namely the protruding ends of the selector finger arms 7? Assume the same position within all of the assemblies connected to the switching devices 40, so that they all correspond to one another Selector finger arms within the frame 21 are aligned with one another. This will facilitate the introduction of the Actuating members I08 between the protruding ends of the selector finger arms 75 made much easier.

The function of the described crossbar is as follows:

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The durohalting process of a coupling point takes place in three steps. In the first step, the selection device 100 is the relevant crosspoint · » column switched on, whereby all crosspoints of this column are prepared for the actuation by the peeling device. At the second step the switching device of those coupling

in

pjfunktzeile switched on and their actuation position transferred, which the specified coupling point contains. As a result, only the latter is activated by actuating the associated contact spring set switched through. In the third step, the dialing device is switched off again and returns to their rest position back while the switching device to maintain the switching connection remains in its actuated position. The circuit connection established in this way is released in a single step, namely by switching off and return of the switching device to its rest position.

The mentioned Schaitsohrltte run in detail as follows abs

by switching on one of the forming selector magnets

ii / fli

of the selected device is the associated selector bar 102 over the corresponding Section of the anchor plate 109 transferred into the corresponding Sohwenkstellung. Here are the Selector finger arms 73 of the associated vertical row of switch webs 77 in the flat sections 89 of the recesses 85 transferred, with which this Switching webs are prepared in the manner explained above for the subsequent contact actuation.

The second step begins with the arousal of the Sohalt magnets 47 a selectively controlled Switching device «whereby the associated armature

48 pivoted and with its section 61 against the associated horizontal row of dial fingers 51 is pressed. This will all

Selector finger arms 73 raised, however, only occurs

the dial prepared in the previous step * arm in contact with the upper edge of the

Recess asbschnitts 89, so that the associated Switching web 77 also against the effect of the Return springs 78, 79 is raised. the

the rest, in the deeper recess sections 90 located dial finger arms lead against it

- 26 -ν 909819/0763

their stroke without affecting the associated 3 switch bars off.

By the upward movement of the switching web 77 does a corresponding movement become sahfelieh®? in this combined contact spring 82 below the effect of the upward preload deformation of this contact spring »released. The, Contact elements 92 and 110 thus occur i namely under an iron of deformation of the Contact spring self-dependent contact pressure. With this movement of the switch web and the associated contact springs, the through-connection of the Crosspoint brought about.

When the WShlvorriolitims and the Return of the selector bar to its rest position become all selector finger arms that were previously licked laterally released and return to their starting position in the area of the recess section ^ 90 ssirtiok, but only of the WäMfingeranses durohgesohalteten crosspoints, which see the anchor section 61 and the upper edge of the recess section 89 of the associated switching web remains clamped.

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When the safety connection is released, the safety magnet ', Λ7 drops out and also releases the holding finger, which was previously held, to return to its starting position. The retaining web 77 then also returns to its lower rest position under the action of the return springs 78 and 79, the contact springs 82 being lifted from the contact rails 93 and the contact elements 92, 110 being separated.

While a controlled switching device to maintain the switching connection of the relevant crosspoint are kept in a suit must, the dialing devices are available again for other switching operations after switching through Disposal. In particular, further connections can be made independently of the thermoswitched coupling point Crosspoints of the same column or the same dialing device are marked and switched through, since the Wählf Ingerarm held in the actuated position controls the movement of the associated actuating member 108 not obstructed and thus all other dial finger arms of this column free between your positions in the field of

* 28 909810/0703

.28 - 1800158

Recess sections 90 and 89 moved back and forth vlr-den can.

The switching steps follow one another in the manner explained, with the first two steps being able to follow one another very quickly as a result of the constant friction between the respective selector finger arm 73 and the edges of the recess 5 of the switching web 77. In practice, an almost simultaneous actuation of the activated selection device and switching device can be achieved. The effective damping or suppression of vibrations of the dialing finger arms, which without damping could result in incorrect switching

■ ur.

lust vegsacht.

It goes without saying that the described embodiment form in a simple way for different crosspoint arrangements or crosspoint numbers can be set up and converted. For example, dialing devices can be used with little effort can also be installed in the frame 21, the holding devices by corresponding

909819/0763

Versions with a larger number of Tfählflngem and Sohaltstege as well as contact spring sets are replaced. This can also be done practically with extremely little expenditure of time carry out·

overall results from the structure described one from prefabricated assemblies simple and quick-to-assemble coordinate switch,

by easy maintenance and repair

possibility at the place of use and duroh preferred

Suitability for large-scale production. A

the main operational advantage is the preceding one explained «high speed of sound as a result of the

Damping of dial finger vibrations. Of special The advantage is the use of wire-shaped contact

springs that have a space-saving design enable and a lower line requirement for have the hold motion. This results in a more compact * with, for example, lower. |

Controllable coordinate eohaiter performance.

909 819/0763

Claims (12)

Expectations 1 · j Electrical Koortiaatensehalfeer with ®in @ r Contact spring set® formed coupling point arrangement as well as with a plurality of you Je © in @ r Koppel « ktih specially designed holdings and , • distant · with a plurality of !! • »fuzzy, open contact spring set«; * tfählfingern «ad © insr @ atspr © cli @ adei ¥ 0 »to confirm contact 'before @@ i © hen @ si t _B Majority of Walilweise aa the WMhIf store aa gripping ». Day- to- day gliders on Dial finger in your position - regarding the sugehtfrigen intended & ± na _s dadurefe giannz © ± oini © t _s each? Seteltsteg CTT) 'one with an «Äff® @ in @ g" WShXfiogers (5'l ·) susamraeaaktivQ recess (85) as well as a Metesahl ^ foa trains »' hfelg © contact springs (HO) © Ines coupling point 909319 / 07S3 -sr- receiving openings (86) that the The apex sections of the selector fingers can be pivoted in the area of the associated switching devices (40) are mounted and that each arm of a selector finger engages in a recess of a switching web (77) and exerts a biasing force acting in two directions on this switch bar. 2. Coordinate switch according to claim 1, characterized in that «each arm (72) of a selector finger (51) has a bias-utgps ** deformation effective in two directions. 3 · Coordinate switch according to claim 1 or 2, characterized by one of the switching and selection devices supporting frame (21), the-a plurality of threaded holes (20} with on both Slots arranged on the sides for the attachment of provided for driving the dialing devices Selection magnet (101 /! Has. Ä 4. Coordinate switch according to claim 5, characterized characterized in that each of the selector magnets (101) has a hollow bobbin (105) thereon located winding (105) and a seated in the Spulenkttper magnetic core (104). 8ÖS83Ö70763 the one at one end in a magnetically operative connection with a selector bar (102) and at its other end one in a threaded hole of the Has screwed Oewindeabschnltt frame. 5. Coordinate switch according to claim 4, characterized characterized in that the bobbin (102) has two engaging in corresponding slots of the frame and the selector magnet in a predetermined position has holding lugs (107) securing the frame. 6. Coordinate switch according to one of the preceding claims »characterized« that the with corresponding selector fingers cooperating recesses (85) of the switching webs a deeper Section (90) and a flatter section (89). 7-coordinate switch according to claim 6, characterized fe marked that in each case two control webs lie next to each other in the catfish, that the deeper Sections (90) of the associated recesses (85) facing each other and the flatter Absohnitte (89) of these recesses are arranged facing away from each other. 900819/0783 8. Coordinate holder according to one of the preceding claims, characterized in that each Switching device (4o) is assigned a movable contact arrangement (42). 9 «Coordinate switch according to claim 8, characterized in that each movable contact arrangement (42) has a row of through one Clamp (80) held together contact spring sets (76) with associated switching webs (77) and return springs (78, 79). 10. Coordinate switch according to Anspruoh 9 $, characterized in that each switching web (77) at one end a connection element (87) for the attack of a return spring (78), and openings (86) for receiving the / contact? - ^ fdder (76) of a contact spring set. 11. Coordinate switch according to one of the preceding Claims, characterized in that each switching device has two brackets (94) fixed contact arrangement (4?) releasably held together to form a structural unit is assigned, the one large number of in two support blocks (94) having contact rails (95) held in parallel with a mutual spacing. 09619/0763 " ⁵ " 12. Hbordinatensehaltep according to claim II «daduvoh j that dl © Kontaktscihlensn about the Streif @ ßllage (92) provided a similar. 909S19 / 0763