DE2336645A1 - METHOD AND DEVICE FOR THE SYNCHRONOUS INFORMATION TRANSFER BETWEEN PARTS MOVING RELATIVELY TO EACH OTHER - Google Patents

Description

CAILNIANWALrE

D R.-I N G. H. FINCKE D I PL.-I N G. H. EJOH R DIPL.-ING. S. STAEGER

Long distance call; "26 60 OK Taleuramme: Claims Munich rOitichockkonloi monks 270 44

Bank details Bayer. Vereimbank Munich, account 620 404

FolderNo. 95 8 7 - Case 355 71/72

Include pictures in the answer

MUNICH ύ, Müliorslraßo 31

18th

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Description of the patent application

the company Stibbe-Monk Developments Liirited Leicester LEI 9LF / England

concerning

"Method and device for the synchronous transfer of information between relatively moving parts ",

Priority; Jul 29, 197 2 - ENGLAND

The invention relates to a method and a device for synchronous information transmission between " see parts moving relative to each other,

In particular, the invention relates to synchronous information transmission from a fixed part to a moving part or from a moving part to a fixed

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des part of a machine of a certain type that comes with a series is optionally equipped with the same elements that can be actuated.

The invention is applicable, for example, and is to be used primarily on knitting machines, tei those a relative movement between a machine bed in which needles to be operated optionally are accommodated, and a lock jacket, a sledge or something similar. Eauteil, takes place, the cam for control and actuation of needles. This general definition is intended to be viewed broadly to include both flatbed and also includes V-Eett and circular knitting machines.

It is known to be optional on certain knitting machines controllable electromagnetic needle drives, namely one Provide a drive for each needle, such needle drives run for example in a circular knitting machine ir generally together with a bed, for example one. Cylinder in which the needles are to, while the lock jacket containing the cams is stationary relative to it, although it is also possible to zuarr.rnen the needle drives stand still with the needle bed and uniausr the lock jacket. allow. On a flatbed or V-Pett knitting machine the electromagnetic needle drives stand together with the needle beds or plates still, while the cam carriage longitudinally over and relative to the beds or plates can be moved.

With such knitting machines the information in Fcrr must be: of control signals for the actuation of the electromagnetic Drives from the fixed part to the moving part or vice versa with one of the working speed override the needle frequency dependent on the knitting machine. One an arrangement of this type to be seen as an example is in the

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German patent application P 20 60 887.6 of Stibbe Machinery'Limited described, according to which an opaque Tape with holes is provided and signals to electromagnetic Needle drives must be given. This tax ' The tape is driven synchronously with the knitting machine, with the holes punched at the needle frequency. The disadvantage such an arrangement can be seen in the fact that Firstly, a beach several inches wide and many yards long is to be provided for when it is stored and used Control takes up a lot of space and, secondly, a drive that acts as an input is to be provided, which is only very effective difficult to achieve.

The invention is therefore primarily to the task Reason to address these disadvantages by developing a new or improved method for synchronous transmission of Control signals in the form of (visible or invisible) light from a stationary to a moving one Remove machine part or vice versa,

A specific object of the invention is to develop a device suitable for carrying out the above-mentioned method, which can be used with advantage on knitting machines.

According to the invention is therefore a method for synchronous Transmission of information in the form of Lient control signals from a first to a second component moved relative to the first, the one with a predetermined number optionally elements which can be actuated and are to be actuated in a predetermined order are provided, characterized in that the information is transferred from the first to the second component in which the information is stored, and that then the stored information in the specified

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Order is given to a selective control of the elements mentioned by triggering the transmission bring about regular flashes of light from the first component, whereby a light receiver on the second component is affected at a frequency that depends on the speed the relative movement between the parts depends, with the number of effective regular Lichtaus transmissions corresponds to the number of elements to be controlled and thus to the information that has been stored.

In one embodiment of the device for exercising This procedure can result in the emission of regular flashes of light take place from the first component with the help of a permanent light source on this first component, on which a grid is arranged from alternately translucent and interposed opaque surface sections. In his case, light from the permanent light source emerges like a flash through the alternately mounted translucent ones Sections of the grating and is directed so - that it acts on a light receiver on the second component. The lightning frequency is determined by the speed of the relative movement between the first and second parts and the distance between the transparent sections determined »and correspond to the number and spacing of these sections the number and the distance between a fraction of the total number of elements to be controlled. In addition, the above is available Number of translucent sections of the grating in relation to the given amount of information contained in one of several memories are included on the other component.

On the other hand, it would also be possible to work with a stroboscope for the intended purpose, which emits regular flashes of light.

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The stored information can most easily be transferred to electrical in the required predetermined order Guide amplifiers, with the help of which the selective control of the elements concerned is initiated or carried out will,

When the invention is applied to a multi-system knitting machine, so many can be used on the first part Sources for regularly emitted flashes of light, i.e. so many permanent light sources and associated grids are provided how systems and thus also needle counting stations are present in the machine, but one can, as follows is to be described in a multi-system machine also just a single source for regular flashes of light and provide a single, dedicated grille,

The invention can also be seen in a device for the synchronous transmission of control signals in the form of (visible or invisible) light from a stationary component to a moving component or vice versa and is characterized in that light signal-emitting diodes for emitting control information on one of the components mentioned are provided as well as a permanent light source that is directed to a grid with alternating translucent and interposed light-shielding sections, while on the other Eauteil light receivers are connected to a threshold detector to monitor the signals emitted by the light-emitting diodes and through the grating absorb light falling, and an electronic memory for storing a predetermined amount of information which corresponds to the number of effective translucent sections of the grating.

In the case of a knitting machine, the above can be used

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Another component advantageously arrange a counter, the via a phototransistor and the threshold value detector Sends out signals that open amplifiers sequentially, connected to electromagnetic needle drives are, the said signals from the shining through the grid onto the component in question Continuous light source and the movement of one of the two Components are generated relative to the other.

The device can also be equipped with a buffer store be equipped, which is connected to a machine control switch, which is the light source and the associated Grid supporting component is assigned to store the information before it is sent to the electronic Memory on the other component is transferred, with the request for information transfer from one Signal transmitter goes out, which influences a signal receiver connected to said buffer memory.

A diode that emits continuous light can serve as a signal transmitter, while a phototransistor can serve as a signal receiver suitable is.

For a better understanding of the invention and its embodiments, certain ^ raictischen below führuttgsformen from the improved information transmission apparatus in conjunction with a circular knitting machine with rotating needle cylinder with reference to the drawings representing the following:

1 shows a schematic perspective view of an embodiment of the device;

Fig. 2 is a vertical section along the line II-II in Fig. 3 through the head of one with the inventive

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Device-equipped circular knitting machine;

Fig. 3 is a view of the inside of the machine with the Cams for controlling the knitting elements shown in FIG. 2;

4 is a partial plan view of a circular knitting machine with a modified form of the synchronization grid. ·

Fig. 2 shows a needle cylinder 1 with incisions la located therein for the reception of displaceable needles between needle rockers 3 and selector rockers 4, the cylinder 1 is held firmly on a support and drive gear 5, which in turn is rotatably arranged with respect to a bearing 6, which rests in a stationary machine frame 7. Fixed to the frame 1 is a holder 8 for a synchronization grille 9, a light source 10 and other associated parts to be described. The lock casing holder 11, which receives the ring-shaped lock casing 12, is also firmly attached to the machine frame by means not shown in detail. Are then in the lock shell to be described squatting for controlling the knitting elements, rotatably connected to the needle cylinder 1 is a series of circuit boards 13 which are attached to a bracket 5 connected to the support Ik. These circuit boards 13 are electrically connected to a power source through a plug 15 and a socket 16. The socket in turn is in electrical connection with .Stromsbusbars 17, which receive power from a rotating transformer. In the present

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The drawings do not provide any more precise information, however, a device is suitable as a transformer, which is described in the earlier German patent application P 20 60 88 2.6, hereby for the details for the arrangement of an electrical power supply for the circuit boards 13 is referred to. Furthermore, ' drive means operating electromagnetically on the bracket 14 18 and arranged in brackets 20 selection wires 19 attached. The exact details for the electromagnetically working drives 18 can be found in Fig. 9 of the already 'mentioned German patent application P 20 60 882.6.

In the special embodiment, which then: is to be described, fourteen selection wires 19 are arranged in each 'selection block' forming bracket 20, t and for each such selection block, there is provided a circuit board 13 corresponding to the respective fourteen selection wires 19 is assigned. Accordingly, in a circular knitting machine with two thousand sixteen needles there are one hundred and forty-four Selector blocks and circuit boards provided. Each circuit board 13 is assigned a light emitting device Diode 21 and two phototransistors 22 and 23 accommodated in the bracket IH,

At every selection station around the machine ^ d, h «at every j

System, a light source 10 is provided, a synchronous ί

sizing grid 9, a phototransistor 24 and two light emitting diodes 25 and 26 best seen in Figure 1 and which will be described in detail later. Each Auswählstation be transmitted also information from a shared buffer memory 27, connected to the (not shown) machine control switch is connected and the selection information contains the _t to the

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Circuit boards 13 is to be transferred. A memory 28, a counter 29, a threshold value detector 30 and fourteen are located on each circuit board

Amplifiers 31 ^1, 31 ² 31, the one with each

of the electromagnetic drives 18 are connected.

Assuming that the machine is running, rotate, as indicated in Fig. 1 by the arrow R, the drives 18, the circuit boards 13 with the associated Share in the direction of the arrow, while the synchronization grid 9 and the associated components are unchanged stay. It can be seen that the light emitting diode 26 and the outgoing from the light source 10 and through a Recess in the grid 9 through the light Phototransistor 2 3 affect. On the other hand, influence the light emitting diode 25 and an open part of the synchronization grid 9 the phototransistor 22, and the light-emitting diode 21 affects the 'phototransistor 24,

Fig. 1 also shows the mechanics that are used for each the fourteen needles to be attached around the knitting machine, as well as the mechanics to be provided at each selection station. This latter mechanism also repeats itself around the machine as often as select stations, i. Systems, are used. As already mentioned, however, the buffer memory 27 is common for all select tilt ions intended.

When the machine is in operation, the rotating mechanism moves in the direction indicated by the arrow R (Fig. 1), and the light-emitting diode 21 acts on the phototransistor 2H _1, which sends a request signal to the buffer memory 27 for selection information for the relevant selection station. These in the form of

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Information given to computer characters L and 0 is then delivered in a block of fourteen bits from the buffer memory 27 to the light emitting diode 25 and from the Phototransistor 22 caught by the threshold detector 30 is determined and passed into the memory 28. Those from the buffer memory 27 in the correct order Any information given must of course be held in memory 28. A sequence of clock or counting pulses is also given from the buffer memory 27 to the light-emitting diode 26, which pulses from the phototransistor 2 3 and captured by the threshold detector 30 can be recognized. The clock pulses occur between each information bit and thus count the no-pulse information bits stored in memory 28 must be, in addition to the pulse bits,

The phototransistors 22 or 22 w, 2 3 then run forward the synchronization grid 9 and receive through this grid a uniform or an interrupted Lighting, the uniform light is first takes and keeps the information in the memory 2 8 in the correct and undisturbed order to the one in question Amplifier 31 ,,,, 31 to influence. Immediately thereafter, the threshold value detector 30 takes the first lighting the interrupted lighting true, whereby the counter 29 is advanced by one digit, resulting in open the amplifier 31 and to energize or de-energize of the associated electromagnetic drive 18, which in turn depends on whether the first, in memory 28 Stored information bit an impulse or a non-impulse, i.e. an L or a 0 in the 'computer code i§t, the jagged' form of the grid 9 has the appearance of fourteen such illumination peaks result, which is determined and by which the counter is switched fourteen times and successively the

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stronger 31 ¹ , 31 ² , 31 ³ "31 ¹² , 31 ^{14 are} opened, whereby the information stored in the memory 28 is released for influencing the associated electromagnetic drives 18.

To ensure the continuity of the dialing process during the just described Maintaining information releases arrives the next light emitting diode and the next pair of transistors to the next select block of fourteen Needles are assigned, in interaction with the phototransistor 24 and the light-emitting diodes 25 and 26 and store the information pertaining to the next fourteen needles obtained from the memory by the with the synchronization gi tter 9 cooperating light source 10 is to be released.

In order to enable a simple schematic representation, the synchronization grid 9 is drawn in FIG. 1 in the form of an opaque strip with cutouts; Such an arrangement is conceivable, but the grid can also be designed as a photographic film with alternately successive light and interposed dark areas in the drawn comb-like arrangement and arranged in the position shown in FIG. 1 in front of the permanent light source 10, .. ^;

Every electromagnetic drive 18 consists, in short, from a permanent magnet and an electrical winding, which when the current flows through the direction of the magnetic flux reverses. In this way the selection wires 19 are normally kept in contact with the drive part 18 (if not the corresponding electrical ones Windings are current-carrying V), '\

The operation of needles 2 and rockers 3 and M are intended

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will now be described with reference to FIGS. 2 and 3.

Immediately before voting, all selection wires 19 are placed against their drives 18 by a cam 32. the Take the intermediate swing 3, depending on the previous selection at the last selection station, either with the fully extended Lines or the dashed position 'a (Fig. 2), while the selector arms 4 are all in the with solid lines drawn position are and there be held by a cam 3 3, which counteracts the action of 'springs 34, which are located on the rear of the Selector rockers 4 are located, this is followed by one or no current application to the windings on the drives 18 in the manner described above, and the select wires 19 are released or retained; therefore some remain Wires in the position marked with solid lines, while others are in the position shown in dashed lines in FIG. 2 take in.

The previously unselected intermediate rockers 3 are now slightly raised by the cam surface 35a on a cam 35 that acts on the lugs 3a, and the previously selected rockers 3 are still either from the cam surface 3 6a of a cam 36 at catch height and / or from a cam 37 cooperating with the lugs 3b of the rockers 3 at knitting height. Then the selector arms 4 are deir. Cam 33 released so that they are pushed forward by their springs 34, and on the respective position of the associated selector wires 19, it depends on whether the rockers 4 are pushed completely forward or not. The shoulders 4a on the rockers 4 in question touch the ends of those selection wires 19 which are in their release position (dashed lines) and which consequently prevent these rockers from moving

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move forward.

Then the intermediate rockers 3, which were previously had been raised to the release or knitting height from a cam surface 38a of the cam 38 by acting guided down on the noses 3a; at the same time, the beveled side 39a of a cam 39 lies against the front the lugs 3b to the intermediate rocker in the direction to pan counterclockwise. After these intermediate rockers 3 are now lowered up to the height, up to which the other intermediate rockers 3 had previously been lifted by the cam, are now all intermediate rockers brought down completely to a position in which they interact with the selector rocker 4 ·. To that extent work the approaches 3c of the intermediate rocker 3 with the head parts 4b of the selector arm 4 together. All intermediate rockers 3 therefore have the position shown in dashed lines in "FIG. 2 taken, and their approaches are either in front of or behind the head parts 4b of the selector arm 4, the as described above, either in the dashed or practically in the indicated with full lines Position (Fig. 2) are, depending on the position that the associated selection wire 19 assumes.

Now all of the selector rockers 4 are pressed inward against the action of the springs 34 by a beveled cam surface 40a on a cam 40. As a result of this process, the pressure on the previously selected wires 19 is released, so that the cam 41 can now place the said wires against the drives 18 again.

By pushing the selector 4 inwardly, as just described, the head parts 4b of those rockers which are in the position shown in dashed lines in FIG

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had found, pressed against the associated lugs 3c of the intermediate rocker 3, causing them to move clockwise can rotate so that the lugs 3b of this swing under the influence of a surface 4 2a of a Cam 42 advised, which lifts this rocker in clearance height, as has been described above. On the other hand will be the intermediate rockers 3, the lugs 3c of which were in front of the head parts 4b of the selector rocker 4, not in this Affected way and continue to run at a low altitude, which is prescribed by a cam 44.

After the depression cams 32 and 41 have exerted their effect, a new selection process of the described Kind of start.

Those skilled in the art will have noticed that in FIG. 3 only two are drawn from a plurality of identical rocker control cam sections. In practice, these follow Sections in a repeating sequence and surround the knitting machine completely, As a result, the cams 32 and 41 coincide with each other, likewise the cams 3 3 and 40, 35 and 44, 36 and 4 2 as well as 37 and 43. All of these cams are around fixed cams, except 37 and 4 3 and the corresponding cams in all other sections, which Cams for low or high working height can be preselected, depending on the type of stitch that must be performed.

All the needles 2 operate exactly in a straight line in that, when the associated intermediate link 3 is elevated to enable or knitting, the needle is raised in a corresponding manner and is then lowered by a cam H5, which acts on an extension 2a. In a corresponding manner, a needle 2 remains, the intermediate rocker 3 of which is not in

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is raised in this way, at a low non-knit height, which is set by the cam 45 when it attacks against the shoulder 2a.

In a modified embodiment shown in FIG. 4, the serrated section is the synchronization grid 9 according to FIG. 1 is replaced by a fiber optic component 47, and the open part of this grating can thus be dispensed with. In this modified embodiment, the fiber optic component 47 thus forms a synchronization grating. The component consists of a housing 49 which has a cutout at 4 9a and 4 9b on its front side has received fourteen equidistant slots. A bundle of commercially available glass fibers 50 is in ■ the cutout 49a inserted in such a way that at the intended end of the bundle a series of glass fibers vertically one above the other are inserted into each slot in the front side 49b of the housing 49, while on the other Bundle all the glass fibers together in a ferrule 48 ^ are taken. The cutout 49a is filled with an epoxy resin that holds the glass fibers 50 in place. The front of the housing 4 9 and the outer end of the ferrule 4 8 are ground and polished so that the light comes on the ferrule can be introduced and passed out the front of the fiber optic component 47; in this respect one can address the component as a synchronization grid, the with the part provided with cutouts of the in Fig, I. drawn grid 9 is comparable.

In the embodiment of FIG. 4 is only. a Fiber optic component 47 on the knitting machine instead of a synchronization grating 9 at each system | as in the embodiment according to Fig.

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the diode 26 and a phototransistor 24 required; In contrast, the arrangement according to FIG. 1 sees a light-emitting one Diode 21 and two phototransistors 22 and 2 3 for fourteen needles each around the machine and in addition, a light emitting diode 25 is provided at each selection station.

In contrast to the embodiment according to FIG modified version according to Fig, 4 a common conductor or a "main rail" before, to which all meters (and Clock) 29 and all threshold detectors 30 are connected. The light source for the fiber optic component 47 can be as Incandescent lamp can be designed in the manner of lamp 10 in FIGS. 1 and 2. Such an incandescent lamp can either be used in the next Near the fiber optic component 47 or at a greater distance from the Be provided assigned to component; in the latter case, j

the light the glass fibers 50 through a glass fiber light guide!

rod 51 are fed, which ends in a cuff 5 2 attached to the ferrule 48. Preferably the incandescent lamp designed as a light source emitting gallium arsenide light, which is relatively inexpensive and particularly easy to adapt to electronic circuits.

In the operation of the system described above, a data signal is given to the buffer memory 27 each time one of the light-emitting diodes 21 passes the single phototransistor 24. In the embodiment described, this occurs once every fourteen needles. When a data request is carried out, the buffer memory 27 supplies the above-described arrangement information by all the light emitting diodes 25 (one per system or Auswählstation), In contrast, only a single series of signals to the lichtauttendenden diode 26 is jetfct required since the counter 29 all electric

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are connected to each other and the light signal picked up by the one phototransistor 23 automatically
all counter 29 is passed on. Accordingly,
Whenever the front side of the one glass fiber component 47 passes a phototransistor 23, all counters 29
causes the amplifier 3.1 to 31 to trigger in the manner described above.

If the same number of permanent light sources 10 and associated synchronization grids 9 are provided in the first embodiment described with reference to FIGS
4) it is possible to work with only one light source 10, a syndhronization grid 9, a light-emitting diode 26 and a phototransistor. 24 - provided that all counters 29 in accordance with the modified arrangement
and all of the threshold detectors 30 would be interconnected by, a common conductor, or a ring bar.

Each threshold detector 30 naturally consists of two detectors: one for each phototransistor 22 and 23, but both detectors are combined in the same component, since it is necessary for clock and information pulses to be transferred to memory 28, and
the clock pulses in the counter 29 can only be transmitted when the detector 22 is a "black" or "no"
Receives light "signal, as in the arrangement according to FIG. 4: in the arrangement according to FIG. 1 a" brightness "signal is required.

Under certain circumstances it would also be possible both in the first and in the second embodiment described

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to provide a light source and an associated synchronization grid on, for example, every second system.

Patent claims:

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Claims (1)

Godparents ta n sayings (1J Procedure for synchronous transfer of information in the form of light control signals from a first to a second component moved relative to the first, the with a predetermined number of elements that can be operated optionally and operated in the intended sequence is provided characterized in that the information is transferred from the first to the second component in which the Information is stored, and that the stored information is then output in the specified order is to selectively control the elements mentioned by triggering the emission of regular flashes of light bring about from the first component, whereby a light receiver on the second B'auteil with a Frequency is influenced, which depends on the speed of the 'relative movement between the parts, wherein the number of effective regular light emissions the number of elements to be controlled and thus the number of items stored previous information corresponds to " 2. Apparatus for performing the method according to claim characterized in that the regular emission of light flashes from the first component (8) by a continuous light source (10) originates from the first component (8), which has a synchronization grid (Fig. 1 and 2: 9 ·, Fig. <+: 47) with translucent and intervening light - 19 -A09811 / 0821 ίο is assigned to impermeable sections that the light emanating from the permanent light source is like a flash passes through the translucent sections of the grating and to act on a Light receiver (23) on the second component (14) is directed that the flash frequency by the speed the relative movement between the first and the second component and the distance between the translucent ones Sections is determined that the number and spacing of these sections number and spacing of a fraction correspond to the total number of elements to be controlled and that said number of transparent elements Sections in the grid are also related to the given amount of information that are stored in a memory of a number of memories (28) on the second component. 3. Device according to claim 2, characterized in that that the information stored in a memory (28) in the required, predetermined order to electrical 1 Ϊ4 · tric amplifier (31 ..... 31) is passed on, with the help of which the selective control of the elements (2, 3 and H) is initiated or brought about. Device according to claim 2 or 3, used in a multi-system knitting machine, characterized in that that on the first component (8) so many light sources (10) and associated synchronization grids (9 or 47) are attached, such as systems and thus needle - 20 - A09811 / 0821 Dialing stations are provided on the machine. 5, device according to claim 2 or 3, applied to a multi-system knitting machine, characterized by that on the first component (8) only a single light source (10) with a single associated synchronization grid (9 or 47) is located. Device for synchronous transmission of information in the form of light control signals with visible or invisible light from a stationary component to a moving component or vice versa, characterized in that that on the one (8) component light signal emitting diodes (25 and 26) are provided which Send out control information, and a permanent light source (10) on a grid (9 or 47) made of alternately arranged translucent and opaque Sections is directed, and that on the other component (14) light receivers, e.g. phototransistors (22 and 23) are arranged with a threshold value detector (30) are connected and light signals from the light emitting diodes and the through said The grids collect incoming light and an electronic memory (28) for storing the specified amount of information corresponding to the number of translucent sections of the grating. 7. Apparatus according to claim 6 applied to a - 21 - 4098 11 / 082-1. Knitting machine, characterized in that a counter (29) is provided which outputs signals via a Phototransistor and the threshold detector (30) 1 14) receives, one after the other, amplifiers (31 ..... 31 to open that with electromagnetic needle drives (18) are connected and that the signals from both the one through the grid (9 or 4 2) on the relevant Component (8) falling light from the continuous light source (10) as well as by the movement of one of the two components relative to the other. Apparatus according to claim 7, further characterized through a buffer memory (27) connected to a machine control switch connected and the light source (10) and the associated grid (9 or 47) supporting Component (8) is assigned and the information is recorded before it is transferred to the electronic memory (28) on the other component (14) is transmitted, the request for this information transmission by means of a signal emitter (21) which has a signal receiver connected to the buffer memory (27) (24) influenced. 9. Apparatus according to claim 8, characterized in that the signal emitter emitting as a continuous light Diode (21) is carried out, while the signal receiver is a phototransistor (24). 10. Device according to one of claims 2 to 9, characterized - 22 - 409811/0821 characterized in that the Synchronxsierungsgxtter (9) cut from an opaque strip is and alternating column and opaque sections in the manner of a toothed, comb-like Having organ. 11. Device according to one of claims 2 to 9, characterized in that _t the Synchronxsierungsgxtter from a photographic film is having the alternately transparent and opaque portions in the manner of a toothed, comb-like member. 12. Device according to one of claims 2 to 9, characterized characterized ,, that the Synchronxsierungsgxtter consists of a glass fiber component (47), which is a bundle of optical Glass fibers (50) which are suitably in place within v.on with mutual Spacing executed columns arranged in the front of a housing provided with a cutout (49) are, and that the light source (10) is either in the immediate vicinity of the fiber optic component or stands at a greater distance, with the light then passing through a fiber optic light guide (51) is fed. 13. Device according to one of claims 6 to 12, applied in a multi-system circular knitting machine with a rotating needle cylinder, characterized in that with A series of circuit boards revolving around the needle cylinder (1) (13) that have a power supply electrical - 23 - 409 811/0821 I (t t t · ■ are to be connected, and also groups of electromagnetic drives (18) and associated selector wires (19) for the control of rockers (3 and 4) and needles (2) are provided that each group of drives forms a selector block which has a number of wires (and thus also the same number of needles), which corresponds to a predetermined fraction of the total number of needles in the machine, so that a circuit board (13) is provided for each selection block, each having a memory (28), a counter (29), a threshold detector (30) and a number of amplifiers (31 ¹ ..... 31 ¹⁴ ), each of which is connected to one of the electromagnetic drives (18) in the corresponding selection block, that each circuit board has a light emitting diode (21) and two phototransistors (22 and 2 3) are assigned, and that at least one light source (10), a synchronization grid ( 9 or 47), a phototransistor (24), a light-emitting diode (2 6) and an accompanying light-emitting diode (25) are provided, which forms one of several such diodes and of which diodes are provided on each system, the light-emitting diodes (21, 26 and 25) are arranged so that they influence the associated phototransistors (24, 23 and 22). 14, Multi-system circular knitting machine with the device according to claim 13, characterized by a buffer memory (27) j common to all systems of the in- - 24 -409811/0821 OQOCC / C outputs information to each selection station and is connected to the machine control switch, as well as the selection information contains, which are to be delivered to the circuit boards (13). 15, multi-system circular knitting machine according to "claim 13 or IU _1, characterized in that each electromagnetic drive (18) consists of a permanent magnet and is fed via an electrical winding, whereby the magnetic flux of the permanent magnet is reversed so that the selection wires (19) normally the Touch the drives unless the associated electrical winding has current flowing through it. For: Stibbe-Monk Developments Limited PATENTANWÄLTE H. FINCKE, DIPL-ING. H. BOHR DIPL-ING. S. STASGEK - 25 - Ο 9 8 1 1/0821