US1978556A - Device for producing changing inscriptions - Google Patents

Description

5 Sheets-Sheet l o. STURNER DEVICE FOR PRODUCING CHANGING INSCRIPTIONS Filed Sept. 11. 1929 SEJEILEIEI @5121 UEEJKQEUYEJ Oct. 30, 1934.

0a. 30, 1934. o. STURNER 1,978,556

DEVICE FOR PRODUCING CHANGING INSCRIPTIONS Filed Sept. 11, 1929 3-Sheets-Sheet 2 Oct. 30, 1934. o. STURNER DEVICE FOR PRODUCING CHANGING INSCRIPTIONS Filed Sept. 11. 1929 3 Sheets-Sheet 3 Patented Oct. 30, 1934 UNITED STATES DEVICE FOR r'n'onuomo CHANGING mscnrr'rrons Otto Stiirner, Berlin-Steglitz, Germany Application September 11, 1929, Serial No. 391,895 In Germany September 15, 1928 Claims.

The present invention relates to a device for producing changing inscriptions. In this device means are used for producing on any display field within a larger frame any display sign or inscription of any required colour. For this purpose the device possesses as many recording bands as display fields are provided. The recording bands are" quite similar. Each of them bears all signs to be indicated one after the other e. g. all letters and numbers. Furthermore means are provided for bringing each band in a great numher of positions thereby producing a great number of inscriptions one after the other automatically appearing in the same succession. The interrupted operation of the recording bands by continuously revolving axles by means of coupling means particularly of electro-magnets, which are cut-in and cut-out by way of a specially provided controlling shaft, is also characteristic of my present invention. This apparatus is further characterized by the feature, that the recording band is reeled upon two drums arranged on two axles running in opposite directions and that the twodrums are connected to and disconnected from the pair of axles by means of electro-magnets in the intermitting rhythm determined by the controlling segments. The principle of the present invention if relating to the accord of the recording bands, will be described by the modi fication examples illustrated in Figs. 1 to 3.

Fig. l is a front elevation of an embodiment of the device according to the invention with 36 dis play fields arranged in three rows one above the other.

Fig. 2 is a plan view of the device of Fig. 1. Fig. 3 isa section on line 3--3 of Fig. l on a larger scale showing the manner how a'recording band provided behind each display field is arranged upon two rollers.

Fig. 4=is a side-view of Fig. 3 partly sectioned on line 4-4;

Fig. 5 is a plan view of the device of Fig. 4-.

Fig. 6 is another embodiment of my invention p 1 analogous to Fig. 3.

of example this position is so chosen, that the band has been reeled upon the upper roller 2 with its effective length, i. c. with all signs or inscriptions recorded on'it, whereas around the lower roller 3 merely the other end of the recording band 1 is laidand fixed to the roller. I

For the purpose of moving the band-1 during any length of time and in any direction, the axles 4 and 5, which run in opposite directions uninterruptedly during the operation of the apparatus, and the four electro-magnets 6, '7, 8, 9 have been provided.

By the nature of the construction the two possibilities are given of making the advertising signs visible to the eye behind the display frame either by moving the .band from its position of rest downwards or upwards; Whereas in the modification example shown, the band in the initial position is unwound from the upper drum, the

isplay signs must be cut-in in the direction from top to bottom. Herefrom results for the continuously running shaft 5 the driving direction in an anti-clockwise sense shown by an arrow, and for the continuously running shaft 4 in a clockwise sense as indicated by an arrow.

The problem now oiiers itself of controlling the movement of the device 1 illustrated in Figs. 3 to 5 so, that at will any recording sign is made to appear on the band behind the display frame 10. According to the present invention the height of the signs and the diameter of the sign drum are adapted one to the other so, that exactly with one revolution or generally spoken with the same angle of the sign drum the recording band behind the display frame travels just by the step of one sign, i. e. by the distance accorded to one sign. In order to arrest the,

band, made of flexible material, at a certain number of revolutions, a brake is made to act upon the roller driven in a definite direction. In case,

e. g., a certain display sign in the modification example Figs. 3 and 4 is to be cut-in, and the band travelling downwards behind the frame is to be arrested, the brake mechanism must be made to act upon roller 2. According to the principle mentioned above it should be made possible to arrest the band just after one complete revolution of drum 2 and exactly during this time pass the band 1 by the step of one sign, i. e. the step from a sign to the next.

It will be readily obvious, that in order to meet these two requirements at a uniform size of all display signs, the distance of the signs one from the other cannot be the same in the longitudinal direction of the band, since in reeling of the band the diameter of the driven drum, that is in example in question drum 2, is decreasing more and more. If the distance from one center of one sign to the center of the adjacent sign is in each case the same, and if, at the beginning of the unwinding operation, this distance just corresponds to the circumference of the full reeled drum 2, the following revolutions of this drum will produce more than one step distance, so that the center of the following display sign does not adjust itself to below the center of the display frame. This displacement is quite considerable and makes illusory the intended effect.

According to the present invention, means have been provided to arrest any number of signs in the prescribed position by means of one single stop on cutting-in. This is obtained in this way, that with uniform size of the letters the distance one from the other is made of different value so that always the resulting step travelled by the letter or sign is equal to the circumference of the particular winding of the band on the drum. From this rule is derived, by means of a simple calculation the actual amount or value 'of the distance between two letters or signs at any given point of the band.

With a band of this type a definite sign is adjusted and subsequently replaced by another by -means of the control mechanism as follows:

At first it is assumed, that in some way or other the band remains in the position of rest also that, after cutting in the driving agent (eiectro-motor, spring-mechanism), theaxles 4 and 5 are made to rotate in the directions indicated in the drawings, by means of suitable gearing. the letter T positioned at the 5th point of the band, is to be displayed, the magnet 8, which is to actuate the drive in the band travelling direction at the driving roller 3, is to be cut-in during five entire revolutions of roller 2 by suitably dimensioning the length of the contacting elements on the control shaft.

In cutting-in the armature of the magnet is attracted, and therefore, displaced to the right hand side, and in its working position is now met by the catch 11 mounted on the shaft 5, and in this manner is conjointly moved by the same. The roller 3 therefore revoives in similar manner to the shaft 5 in an anti-clockwise direction, and the sign band 1 moves from the top towards the bottom. Before completion of the fifth revolution of the driven roller 2 the circuit for the operating magnet 8 is broken. The armature of the magnet is returned into the normal position as shown under the action of a spring. A brief moment later, or possibly also simultaneously therewith, the circuit of the braking magnet 7 is completed by the appertaining member on the control shaft and the armature thereof is attracted.

, The armature then meets against a stop 12 having a form as shown by way of example in the plan view in Fig. 5. Ihe sign band 1 has now been introduced and remains so during the period provided for the display of a sign. The braking magnet '7 remains connected for the same period. After the appertaining contact element has run off its circuit is broken and the armature thereof releases the arrested band.

If in the following composition with the same band a sign is to be displayed, which as compared with the preceding sign, i. e. T, for ex ample, is arranged on the band at a subsequent point in the natural counting sequence, it is mere- 1y necessary, by means of'the contact element.

provided for this purpose to complete the circuit of the magnet 8, and to advance the roller 3 in the direction hitherto followed to the extent of a corresponding number of revolutions. If, for

- instance, change over is to be made to the letter Q which is at the 22nd position on the band, a segment for the second composition requires to be provided, which completes the circuit of the electro-magnet 8 for 17 additional revolutions of roller 2.

If now, e. g.,

In the form of embodiment shown in Figs. 3 to 5 the connection of the driving magnet 6 is performed immediately after cutting out the circuit for the braking magnet '7 by the fact that when connecting the circuit by means of the appertaining contact element the hook mounted on the armature of the magnet 6 strikes against the appertaining operating member 13. The length of this contact element completes the circuit for the magnet 6 for the duration of five revolutions of drum 2. This contact member may therefore be as long as the contact element for the circuit of the operating magnet 8 causing display of the letter T. After the band has been returned or approximately returned into its initial position, the operating magnet '6 is cut out after the run of the brush-of the contact element has expired; and the 4th magnet, i. e. the braking magnet 9, connected by the 4th contact element.

If further signs are not to be displayed, the motor may be switched off in this position of rest. It is preferable to first disconnect the driving motor for the shafts 4 and .5, and not until then to break the circuit of the brake magnets 9 by means of a second switch. If the apparatus is to be again operated later at first the braking magnet 9 is connected and not until then the driving motor, or the shafts 4 and 5 respectively.

The contact element for the braking magnet 9 will in that case be very short if in chang ing over to a sign immediately following the brake magnet 9, immediately after being connected, is again disconnected and the operating magnet 6 cut in. The whole procedure then commences anew.

In this manner a perfect and reliable operation is ensured, the moved band being therefore arrested at an exactly determined point. It is merely necessary in this connection that the speed of the band during the changing over operation is not very high. The nature of the invention, however, does not necessitate that this speed be very high. In contradistinction to all advertising apparatuses hitherto known, in which the change over takes place during a deadrinterval, the result of this invention is a particularly pleasing optical effect when change over takes place.

It will be obvious that, for example, in an ad- 1 a higher position number, and whether the signs following in chronological sequence are situated wide apart on the band or adjacent to each other. The operation of an apparatus of this type will, generally speaking, proceed, in such manner that upon changing over the different bands are moved in difierent directions and at different speeds, so that in this manner a kaleidoscopical effect results. This may be still further increased by the fact that in an apparatus with transparent display signs the coloured back ground 21 (Fig. i

6) may be removed during the change-over operation. The concussions caused by the contact of the magnet armatures on the operating members or the stops respectively may be attenuated by the fufi'that the bands are left to themselves for a time, and are moved or braked respectively by reason of the friction.

In the embodiment shown in the drawings and so far described, the 4 control magnets required for each band are distributed in pairs per roller, the operating magnet for the one direction and the brake magnet for the other direction being fitted in each roller. The invention is by no means, however, restricted to this special arrangement.

The principle of reverse run can, in accordance with the invention be varied for example in the following manner:

After cutting out the operating magnet 6 for the back run the band is not arrested by actuation of a special braking magnet, but by the fact that a pawl is actuated by the tension of the band and snaps for example into an indent provided on the periphery of the roller 3. The release of the pawl may be effected by actuation of the armature pertaining to the operating magnet 8.

In this case only one single braking magnet is required.

As' regards the constructional arrangement of the embodiment according to Figs. 3-5, atten tion should be paid to the fact that in order to avoid magnetic leakage the rollers 2 and 3 should be made of a non-magnetic material. Particularly suitable are brass or bronze, more especially, however, by reason of its light weight, aluminum or a similar metal. The magnets are placed in the rollers incapable of rotation. To prevent rotation a pin 14 or 15 is provided for each magnet in the case of the roller 2 according to Fig. l. Any other suitable securing means, however, may be employed for this pur pose.

A special jacket 16 is provided for securing the band 1 to the periphery of the roller, which jacket preferably consists of an insulating material, for example fibre. In the latter case a rectangular piece of fibre approximately having the width of the band 1 and a length conforming with the periphery of the roller is bent about the latter preferably in a hot state, and held together at the end by two pairs of rings l7, l8 and 19, 20. With a construction of this kind no special races are necessary for conducting the current to the con.- trol magnets.

For the bosses of the rollers a self lubrication material is for example particularly adapted, such as pressed cotton saturated in oil. It is also pos sible to provide special means for the lubricating of the rollers. Thus, for example, the hollow shafts 4 and may be filled with fat or other lubricant. In this case grooves are provided on the periphery of the shafts at the point where the rollers are mounted through which grooves the lubricant is able to pass to the surfaces to be lubricated.

By suitable distribution of the characters on the band it is possible to accomplish that even in the case of low circumferential speeds on the part of the shafts the periods of changing over are relatively short.

The form of embodiment shown in Figs. 3-5 is more particularly adapted for the use of display signs which are executed in colours. These may be of any desired kind. If on the other hand it is desired to employ cut out ortransparent characters, the embodiment shown diagrammatically in Fig. 6 will be found suitable. In the latter the same parts are designated in exactly the same manner as in'Figs. 3 and 4. Beyond this 21 is a separate and preferably movable background.

This may be passed behind the sign band at right angles to the direction of movement thereof and wound in the form of an endless band or also in the manner of a roller blind. This arrangement enables ever changing new effects to be produced. Thus, for example, each inscription may be of one colour or in each case in different colours.

It will also be seen from Fig. 6 that when using a coloured background itis preferable to pass the sign band over special guide rods or rollers 22, 23, in order to obtain sufficient space for the back ground (21). These rollers also permit for a given method of mounting the band the straight part thereof passed behind the display frame to be increased, so that it is accordingly possible to employ display signs of desired size. It is furthermore accomplished that the band 1 is passed behind the display frame in the same position, contrary to the arrangement in Fig. 3, in which the position of the band depends upon the rolled extent of the two rollers.

The particular method of changing over according to the invention ensures that the band consisting of a flexible material, for example, of cellulose derivatives known per se being transparent, very thin, not or only a little elastic, not or only a little inflammable and having a large strength, is always firmly tensioned. As the band may become loose in the course of time and since it is desirable to be able to adjust the degree of tension, a tensioning device is therefore provided in the case of the embodiment according to Fig. 6. A specially firmlytensioned leaf spring 26 and 27 acts on each of the rotary attachment members 24 and for the guide rods 22 and 23. Thi: arrangement is shown in purely diagrammatical form and may be constructed in any desired manner appearing suitable.

The invention relates not only to the apparatus proper consisting of the sign bands, the rollers provided for the mounting of the same, and the control magnets but also to the actual control device and more particularly the control shaft and the mounting thereof. Formerly I have already proposed that and how the control shaft, for the purpose of displacement thereof in its longitudinal direction is furnished with threads, which, upon the rotation of the shaft, pass through a female thread, and that the threaded bearing of thecontrol shaft is divided, and upon termination of the axial movement of the control shaft is folded over by lever transmission, so that the control shaft acted upon by the pressure of a spring is capable of returning into the initial position.

According to the invention, the arrangement for changing over the control shaft is considerably simplified.

A possible form of embodiment of this arrangement according to the invention is shown by Fig. 7. In this figure 28 is that particular part of the control shaft, which is furnished with the guide thread for example a fiat thread, 29 is the armature of the electro-magnet performing the guiding action in place of a female thread. For this purpose the same possesses teeth of the same shape as the profile of the thread. The number of teeth and also the number of magnets depend on the size of the control shaft, on the running conditions, etc. Immediately upon completing the circuit the armature is Withdrawn from the control shaft under the action of the spring or force, returns into its initial position.

According to the invention furthermore the lllll control shaft is covered with a jacket consisting of insulating material, and the segments are secured at the points determined by the programme governing the display. Rubber, for example, is suitable as material for an insulating coating of this kind. In this case the owner of the apparatus has the advantage of introducing the segments himself for any inscriptions at predetermined points on the rubber coating for example by means of pincers. In place of an elastic coating composed-of rubber, the segments maybe covered on a flat sheet with cardboard, compressed board or any other suitable material. Such a sheet may be printed in permanent manner with a series of lines such as shown in Fig. 9.

In the latter the straight oblique lines provide the generating lines for the helices on which the contact elements for the control magnets are situated. The presentation is based on the assignment of one winding to one control magnet. In Fig. 6 the development of a'four-threaded screw is accordingly shown. To explain the provision of contact elements on the periphery of the control shaft, the examples dealt with above as regards the adjustment of different display signs on a band are, in Fig. 9, selected consecutively.

The generating lines for the segment spirals are designated in Fig. 9 in Roman figures. On the spiral 1 is provided a segment 30 for connecting the magnet 8 with a view to adjusting the letter T. In addition to this as above described, the roller 3 in Fig. 3 i s to be rotated to the extent of exactly five revolutions anti-clockwise. This duration conforms with the length of the segment 30. After the segment has run off, the magnet 8 is disconnected and the brake magnet 7 cut on. This occurs by means of the segment 31 which is mounted on the spiral II. The length of this segment conforms with the adjustment of a certain inscription. After this segment has run off, the circuit for? the magnet '7 is interrupted, and the stop 12 f-(Fig. 5) released by the armature thereof. Together therewith there occurs the connection of the operating magnet 6 for the reverse movement, viz, likewise for five revolutions of the roller 2, so that the band is again situated in its position of rest. For this purpose there is provided'on the spiral III the segment 32. After this segment has run 01f, the operating magnet 6 is disconnected and the braking magnet 9 cut on. For this purpose the short segment 33 is provided on the spiral IV.

.It is desired to introduce the letter D. For this purpose, two revolutions are required, and for this there is provided on the spiral V the segment 34, the length of which exactly conforms with two revolutions of the roller 2. In similar manner as in the case of the first inscription the segment 35 is fitted into the position as shown on the spiral VI. This thereforeserves for connecting the braking magnet 7 for the duration of the adjustment. For the thirdjinscription provision is made for the letter Q situated at the 22nd point. The band must accordingly be moved to an additional extent of twenty revolutions. This is rendered possible by the segment 36 likewise situated on the spiral V and by the segment 37 situated on the spiral IX. The total length of the segments 36 and 37 conforms with the twenty revolutions of the sign band, as the operating magnet 8 is. connected during this time. The segment 38 completes the circuit for the braking magnet 7 for adjustment of the third inscription. In this manner the covering for all inscriptions of the band 1 is performed on the part of the control shaft provided therefor from A to B, and also the covering on the appertaining part for the adjacent bands of the same pair of shafts.

It will be seen from Fig. 9 how the segments should be arranged one behind the other in order that the braking magnet is not switched on during the movement of the band by an operating magnet. In this case the band would be subjected to inadmissible strains and possibly destroyed. This is avoided by the fact that the segments do not mutually overlap, and the end edge of the segments for the operating magnet is situated on the same line as the commencing edge of the segment for the braking magnet. This condition is fulfilled in Fig. 9. This may be recognized, for example, from the manner in which the segments 30 and 31 meet together. The zero line, along which the two edges in question are situated, is the dotted line a--a. This zero line has the significance of a bounding position. If the same passes through the commencing edge of the segment 31, it is by no means necessary that the end edge of the segment 30 is also situated thereon. quires to be switched on after the band which has been left to itself has reduced its speed due to the friction of the rollers, the segment 30 will be shorter to an extent conforming with this duration.

According to the invention, means are provided so that any disturbing overlapping of the segments is unable to occur. Care is taken that, for example by means of the segment 32, the circuit for the operating magnet 6 cannot be completed until the circuit for the braking magnet 7 has been broken by the segment 31. A possible form of embodiment in this connection is shown by Fig. 8. In the latter 39 is the particular part of the control shaft on which the contact elements are mounted. The same consists, for example, of a tube composed of brass or other suitable material, in which connection an insulating material may also be employed. About the periphery of this tube is placed the sheet 40, in which, according to Fig. 9, contact elements are provided. In the position shown, the circuit of the braking magnet 7 is completed for adjustment of the character T, for example by the segment 31. This occurs by reason of the fact that by means of the tension in a downward direction into its middle position, where it is then situated for a brief space of time. If the control shaft moves to an additional extent, the sliding member 41 moves into a hole in the sheet 40. This hole conforms, for example, with the contact element 32 for connecting the magnet 6. As a matter of fact, the magnet 6 will be switched on at this moment, as the contact 46 upon the downward movement of the spring 42 moves into engagement with the contact 48 mounted on the spring 47.

The switch which is shown in purely diagrammatical form possesses in addition two insulating members 49 and 50. The same may be constructed in the manner known per se as momentary switch,

for example as tumbler switch. If the current for 5 If the braking magnet first re- L.

the control magnet is to be taken from the lighting network, an intermediate relay is preferably allowed to be actuated by the double switch in the manner known per se. In this manner it is readily possible to avoid sparking upon the separation. It is also possible to employ other known means for this purpose, for example the provision of condensers at suitable points.

According to the form of embodiment in Fig. 8 the contact elements 31 and 32, for automatic regulation of the connection, are arranged one behind the other on the same spiral In this manner space is obtained on the control shaft for additional inscriptions. In similar manner, by means of a corresponding double switch, the contact elements for the other two controlmagnets may be arranged-on one single spiral. According to the invention the arrangement is then such that an intermediate relay is provided either for each pair of magnets or for each band.

Upon the use of double switches the sheet 40 for controlling the one magnet, as shown by Fig. 8, is furnished with elevations, and for controlling the other magnet with recesses (holes). The covering of the sheet 40 with uniform contact elements is preferably eifected by a machine, viz., with a special device for each kind of contact element.

The mechanical device for equipping the sheet 40 with the contact elements possesses a key board on the lines of a typewriter and a certain key is assigned to each contact element. By the actuation of this key the sheet 40 which is preferably tensioned in the device in accordance with the position shown in, dotted lines in Fig. 9, is furnished either with perforations or with segments. The arrangement will preferably be such that at the same time automatically with the line advanced from one spiral to the next one such an advance or backward movement of the line itself is caused that the contact elements commence on a straight line A B or C D respectively.

In the diagram forming the basis of Fig. 9, it is assumed that all inscriptions at the end' of the adjustment vanish at the same instant, i. e. that the change over occurs simultaneously on all bands. For this reason the end edges of the contact elements for the braking magnet 7, or the commencing edges for the operating magnet 6 respectively, are situated on a jacket line C D, or on a line parallel thereto. It is furthermore assumed that the advance movement out of the position of rest also occurs at the same moment in the case of all hands. This indicates that the 1 connecting edges for the operating magnets 8 are also situated on a jacket line A B. This certainly applies only to such inscriptions in which reverse movement may be necessary at all.

As regards the contact elements for connecting the operating magnets for both directions, this condition according to the above is obviously fulfilled, as a certain number of revolutions i of the roller in the direction of change are assigned to each display sign.

The time of adjustment of an inscription may also be determined in revolution figures on the part of the roller driven in the direction of change. In this manner there is obtained,,not only for the contact elements of the magnets 8 and 6 but also for those of the magnets 7 and 9 the same divisioning, if it is additionally assumed thatwhen changing over via the position of rest the band is stopped for the duration of a whole revolution, or possibly also half a revolution of the roller, which is driven in the direction of change.

In this manner each contact element consists of a whole number of units. It is now possible with the mechanical perforation of the sheet to perform'operations in connection with the control shaft with one single activelever, and every desired contact element is received by the corresponding number of consecutive actuations of this key. It is accordingly assumed in this connection that in similar manner to a typewriter the carriage, with the sheet which is to be equipped, for example,from the left towards the right, moves after each actuation of this key from the right towards the left. As regards the idle key etc., the arrangement may be carried out in the manner known per se.

As already set forth, the lighting network may be utilized, for example, as source of current for the electromagnets. To the same lighting-network may also be'connected the electromotor, in the event of a clockwork mechanism or any othersuitable device not being employed for operating the continuously running shafts. With any kind of operation the opposite run of the continuously actuated shafts 4 and 5 pertaining to one band is preferably obtained by the fact that an interengaging set of wheels (toothed wheels, friction wheels) are fitted in a bounding plane of the shaft. By suitable transmission both the operation of the continuously running shafts as well as of the control shaft will be performed by the same force. The control shaft naturally runs much more slowly than the other-shafts. The transmission from the control shaft to the running shafts, more particularly in the event of the length of all contact elements provided being composed of a whole series of unit elements, should be so selected that the circumferential velocity of the running shafts is a multiple of the circumferential velocity of the control shaft. The sheet 40 is preferably furnished with a parallel series of lines in the spacial relation of a unit element and in that particular direction which conforms with a jacket line on the control shaft.

Without intending to exhaust all possibilities of use in connection with the device according to the invention, it may additionally be remarked that the same is particularly adapted for shop window advertisement, for the display of advertising matter for theatres and picture houses, for the display of matter at exhibitions, for reproducing in interesting manner publications by government departments, such as the State Railway, for

mounting on vehicles, i. e. the tramway to indicate 1. In an arrangement for producing changing inscriptions, recording bands with all display-signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, means for uninterruptedly running said axles in opposite directions, a con-- trol shaft, a device for driving this control shaft, controlling elements upon the surface of this control shaft and between the sign drums and said uninterruptedly running axles coupling elements,

controlled by the controlling elements upon ,the surface of the controlling shaft. I N,

2. In an arrangement for producing changing inscriptions, recording bands with display signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a motor for counter running said axles, a control shaft displaceable in its longitudinal direction, a thin sheet surrounding the control shaft and equipped with controlling elements, an electromagnet arranged in each sign drum for coupling the uninterruptedly running axle alternatively with a sign drum sitting on this axle, and a brake acting upon the roller driven in a definite direction for each recording band.

3. In an arrangement for producing changing inscriptions, recording bands with display signs arranged one after the other upon the bands in different distances, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, the distance of neighbouring signs of a recording band being such a one that exactly with one revolution of the sign drum the recording band behind the display frame travels, just by the distance accorded to one sign, a motor for counter running said axles, a control shaft displaceable in its longitudinal direction, a thin sheet surrounding the control shaft and equipped with controlling elements, an electromagnet arranged in each sign drum for coupling the uninterruptedly running axle alternatively with a sign drum sitting on this axle, and a brake acting upon the roller driven in a definite direction for each recording band.

4. In an arrangement for producingchanging inscriptions, recording bands with all display signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a motor for counter running said axles, a control shaft equipped with controlling elements, a gearing of the control shaft to the running axles of such a dimension that the number of revolutions of the running axles is a multiple of the number of revolutions of the control shaft. M

5. In an arrangement for producing changing inscriptions, recording bands with display signs arranged one after the other upon the bands in different distances, a pair of axles, one brake acting upon the drum driven in a definite direction for each recording band, a gearing of the control shaft to the running axles of such a dimension that the number of revolutions of the running axles is a multiple of the number of revolutions of the control shaft.

6. In an arrangement for producing changing inscriptions, recording bands with display signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a motor for counter rurming said axles, a control shaft, controlling elements upon the surface of this control shaft, a device for driving this control shaft and electric means adapted to couple alternately each drum with either of said continuously revolving,

the surface of said controlling shaft.

7. In an arrangement for producing changing inscriptions, recording bands with display signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a control shaft, controlling elements upon the surface of this control shaft, a single motor for counter running said axles and for driving this control shaft and electric means adapted to couple alternately each drum with either of said continuously revolving axles for moving the band in any position showing any display sign, this electric means being controlled by the said controlling elements upon the surface of said controlling shaft.

8. In an arrangement for producing changing inscriptions, recording bands with all display signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a control shaft, controlling elements upon the surface of this control shaft, a single motor for counter running said axles and for driving this control shaft and electromagnets adapted to couple alternately each drum with either of said continuously revolving axles for moving the band in each direction to any position showing any display sign, these electromagnets being controlled by the said controlling elements upon the surface of said controlling shaft.

9. In an arrangement for producing changing inscriptions, recording bands with all display signs to be shown one after the other, means for moving these bands in each direction to each position showing any display sign, a control shaft displaceable in its longitudinal direction, a, thin sheet surrounding the control shaft and equipped with elements arranged in spiral lines and controlling said means moving the bands, a single motor for activating that means and for driving this control shaft.

10. In an arrangement for producing changing inscriptions, recording bands having transparent display signs to be shown one after the other, and consisting of cellulose derivatives being transparent, very thin, not or only a little elastic, not or only a little inflammable and having a large strength, a coloured background arranged behind these bands and means for moving this background in a direction at right angles to the direction of movement of the recording bands.

11. In an arrangement for producing changing inscriptions, recording bands of cellulose derivatives with transparent display signs to be shown one after the other, a coloured background arranged behind these bands, means for moving these bands in each direction to each position showing any display sign, a control shaft displaceable in its longitudinal direction, a thin sheet surrounding the control shaft and equipped with elements arranged in spiral lines and controlling said means moving the bands, a single motor for activating that means and for driving this control shaft.

12. In an arrangement for producing changing inscriptions, recording bands of cellulose derivatives with transparent display signs to be shown one after the other, a coloured background arranged behind these bands, means for moving this background in a direction at right angles to the direction of movement of said bands, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, the distance of neighbouring signs of a recording band being such a one that exactly with one revolution of the sign drum the recording band behind the display frame travels just by the distance accorded to one sign, electric means adapted to couple alternately each drum with either of said continuously revolving axles for moving the band in any position showing any display sign, a control shaft displaceable in its longitudinal direction, a thin sheet surrounding the control shaft and equipped with elements arranged in spiral lines and controlling said electric means moving the hands, a single motor for activating that i. and for driving this control shaft.

13. In an arrangement for producing changing inscriptions, recording bands of cellulose derivatives with transparent display signs to be shown one af ter the other, a coloured background arranged behind these bands, means for inc/ing this background in a direction at ri ht angles to the direction of movement of said a pair of axles, pairs of drums sitting on said axles upon which drums each recording band is reeled in the form of a roller, blind, the distance of neighbouring signs of a recording band being such a one that exactly with one revolution of the sign drum the recording band behind the display frame travels just by the distance accorded to one sign, electric means adapted to couple alternately each drum with eitherof said continuously revolving axles for moving the band in any position showing any display sign, a control shaft displaceable in its longitudinal direction, a thin sheet surrounding the control shaft andequlpped with elements arranged in spiral lines and controlling said electric means moving the bands, a single motor for activating that means and for driving this control shaft, a gearing of the control shaft to the axles of such a dimension that the number of revolutions of the axles is a multiple of the number of revolutions of the control shaft.

14. In an arrangement for producing changing inscriptions, recording bands with displaysigns to be shown one after the other, a pair of axles, pairs of drums upon. .which each recording band is reeled in the form of a. roller blind, a control shaft, controlling elements upon the surface of this 'control shaft, a single motor for counter running said axles and for driving this control shaft and electric means adapted to couple alternately each drum with either of said -c0ntinuou sly revolving axles for moving the band in any position showing any display sign, this electric means being controlled by the said controlling elements ternately each drum with either of said continuously revolving axles for moving the band in each, direction to any position showing any display sign, these electromagnets being controlled by the said controlling elements upon the surface of said controlling shaft.

16. In an arrangement for producing changing inscriptions, recording bands with display signs to be shown one after the other, a pair of axles,

pairs of. drums sitting on said axles and upon which drums each recording band is reeled in the form of a. roller blind, a motor for counter runhing said axles, a control shaft displaceable in its longitudinal direction, a thin sheet sumounding the control shaft and equipped with controlling elements, an electromagnet arranged in each sign drum for coupling the uninterruptedly running axle alternatively with a sign drum sitting on this axle, a brake acting upon the roller driven, a gearing of the control shaft to the running axles of such a dimension that the number of revolutions of the running axles is a multiple of the number of revolutions of the control shaft.

17. In an arrangement for producing changing inscriptions, recording bands with display signs to be shown one after the other, a pair of axles, pairs of drums sitting said ax es and upon which drums each recording band in the form of a roller blind, a control shaft displaceable in its longitudinal direction, controlling elements upon the surface of this control shaft, a single motor for counter running said and for driving this control shaft and elec tromagnets adapted to couple alternately drum with either of said continuously revolving axles for moving the band in each direction to any position showing any display sign, thee.

electromagnets being controlled by the said controlling elements upon the surface of this con trol shaft, a single motor for counter running said axles and for driving this control shaft, electromagnets adapted to couple alternately each 'lrum with either of said continuously revolving axles for moving the band in each direction to,

anyposition showing any display sign, these elec tromagnets being controlled by the said control ing elements upon the surface of said controlling shaft, a gearing of the control shaft to the running axles of such a dimension that the number of revolutions of the running axles is a multiple of the number of revolutions of the control shaft. Y r

19. In an arrangement for producing changing inscriptions, recording bands with all display signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blinds. control shaft, controlling elements upon the surface of this control shaft, a single motor for counter running said axles and for driving this control shaft, and an electromagnet adapted to connect alternately each drum to and disconnect from either of said continuously revolving axles for moving the band in either direction, an electromagnet adapted to arrest the drum driven, after the driving electromagnet having been disconnected from the continuously revolving axle, by means of one single stop on cutting in the band in any position showing any display sign the distance of neighbouring signs of a recording band being for this purpose such a one thatexactly with the same angle of the sign drum the recording band behind the display frame travels just by the step of one sign, all these electromagnets being controlled by the said controlling elements upon the surface of said controlling shaft.

20. In an arrangement for producing changing inscriptions, recording bands with all dis.-

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play signs to be shown one after the other, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a control shaft, controlling elements upon the surface of this control shaft, a singe motor for counter running said axles and for driving this control shaft, and an electromagnet adapted to connect alternately each drum to and disconnect from either of said continuously revolving axles for moving the band in either direction, an electromagnet adapted to arrest the drum driven, after the driving electromagnet having been disconnected from the continuously revolving axle, by means of one single stop on cutting in the band in any position showing any display sign the'distanoe of neighbouring signs of a recording band being for this purpose such a one that exactly with the same angle of the sign drum the recording band behind the display frame travels just by the step of one sign, all these electromagnets being controlled by the said controlling elements upon the surface of said controlling shaft, a gearing from the controlling shaft to the running of such a dimension that the number of revolutions of the running axles is a multiple of the number of revolutions of the control shaft.

21. In an arrangement for producing changing inscriptions, recording bands with all display signs to be shown. one after the other, a pair or axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a control shaft, controlling elements upon the surface of this control shaft arranged in spiral lines, a single motor for counter running said axles and for driving this control shaft, and an electromagnet adapted to connect alternately each drum to and disconnect from either of said continuously revolving axles for moving the band in either direction, an electromagnet adaptedto arrest the drum driven, after the driving electromagnet having been disconnected from the continuously revolving axle,

by means of one single stop on cutting in the band in any position showing any display sign the distance of neighbouring signs of a recording band being for this purpose such a one that exactly with the same angle of the sign drum the recording band behind the-display frame travels just by the step of one sign, all these electromagnets being controlled by the said controlling elements upon the surface of said controlling shaft, guiding threads at the ends of said control shaft permitting a displacement in its longitudinal direction and means for returning the control shaft into its initial position.

22. In an arrangement for producing changing inscriptions, recording bands with all display signs to be shown one after the other, a pair of axles, pars of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller bl'nd a control shaft. controlling elements upon the surface of this control shaft, a single motor for counter running said axles and for driving this control shaft, and an electromagnet adapted to connect alternately each drum to and disconnect from either of said continuously revolving axlesfor moving the band in either direction, an electromagnet adapted to arrest the drum driven, after the driving electromagnet having been disconnected from the continuously revolving axle, by means of one single stop on cutting in the band in any position showing any display sign the distance of neighbouring signs of a recording band being for this purpose such a one that exactly with the same angle of the sign drum the recording band behind the display frame travels just by the step of one sign, means to arrest the reverscly running band in its position of rest, these means and those electromagnets being controlled by the said controlling elements upon the surface of said controlling shaft.

23. In an arrangement for changing inscriptions, recording bands with display signs to be shown one after the other, a pair of axles, pairs of drums upon which the recording band is reeled in the form of a roller blind, means for uninterruptedly running said axles in opposite directions, a control shaft, a device for driving this control shaft, controlling elements upon the surface of this control shaft, electromagnetic means adapted to connect to and to disconnect from said uninterruptedly running pair of axles alternately each drum, means to arrest the interruptedly running drums in any position showing any display sign, these arresting means and those..electromagnetic means being controlled by the said controlling elements of the said controlling shaft.

24. In an arrangement for changing inscriptions, recording bands with display signs to be shown one after the other, a pair of axles, pairs of drums upon which the recording band is reeled in the form of a roller blind, means for uninterruptedly running said axles in opposite directions, a control shaft, 2. device for driving this control shaft, controlling elements upon the surface of th s control shaft, electromagnetic means adapted to connect to and to disconnect from said uninterruptedly running pair of axles alternately each drum, means to arrest the interruptedly running drums in any position showing any display sign, these electromagnetic means being controlled by the said controlling elements of the said control ling shaft.

25. In an arrangement for producing changing inscriptions, recording bands with all display signs to be shown one after theother, a pair of axles, pairs of drums sitting on said axles and upon which drums each recording band is reeled in the form of a roller blind, a control shaft, bearings for said control shaft enabling its rotation and axial displacement, controlling elements arranged in spiral lines and forming elevations and recesses upon the surface of this control shaft, a motor for counter running said axles and for driving this control shaft, and an electromagnet adapted to connect alternately each drum to and disconnect from either of said continuously revolving axles for moving the band in either direction. an electromagnet adapted to arrest the drum driven, after the driving electromagnet having been disconnected from the continuously revolving axle,

by means of one single stop on cutting in the band in any position showing any display sign the,

distance of neighbouring signs of a recording band being for this purpose such a one that exactly with the same angle of the sign drum the recording band behind t1 e display frame travels just by the step of one sign, all these electromagnets being controlled by the said controlling elements from which those controlling electromagnets operated one after the other are arranged in the same spiral line upon the surface of said controlling shaft, a gearing from the controlling shaft to the running axles of such a dimension that the number of revolutions of the running axles is a multiple of the number of revolutions of the control shaft.

o'r'ro STURNER.

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