US3617628A

US3617628A - Arrangement for automatically inserting type group shift signals in keyboard transmitters

Info

Publication number: US3617628A
Application number: US786162A
Authority: US
Inventors: Otto Holstein; Walter Herwig
Original assignee: International Standard Electric Corp
Current assignee: Alcatel Lucent NV
Priority date: 1968-01-11
Filing date: 1968-12-23
Publication date: 1971-11-02
Anticipated expiration: 1988-11-02
Also published as: NL6900392A; BR6905520D0; AT311433B; DE1289866B; BE726784A; FR2000149A1; CH489967A

Abstract

A teleprinter keyboard arrangement for automatically inserting type group shift signals. The shift signal is provided by depressing any key not included in the type group used in the previous action. The result therefrom is a change in the relative positions of two interacting bars forming a shift bar assembly. One of the bars responds and is common to all figure keys, and the other responds and is common to all letter keys. The relative change of positions of the bars disconnects the actual transmitter in favor of an auxiliary transmitter for the time required for transmission of one signal combination. The operation provided is accomplished without the aid of storage facilities.

Description

United States Patent Inventors Appl. No.

Filed Patented Assignee Priority ARRANGEMENT FOR AUTOMATICALLY INSERTING TYPE GROUP SHIFT SIGNALS IN KEYBOARD TRANSMITTERS 13 Claims, 6 Drawing Figs.

Int. Cl

Field of Search A, 17 C, 17 D, 79, 80, 81,17.5

References Cited UNITED STATES PATENTS 2/1967 Gassino Primary Examiner- Kathleen II. Claffy Assistant Examiner-Tom DAmico Attorneys-C. Cornell Remsen, .lr., Walter J. Baum, Percy P.

Lantzy, Philip M. Bolton, Isidore Togut and Charles L. Johnson, Jr.

ABSTRACT: A teleprinter keyboard arrangement for automatically inserting type group shift signals. The shift signal is provided by depressing any key not included in the type group used in the previous action. The result therefrom is a change in the relative positions of two interacting bars forming a shift bar assembly. One of the bars responds and is common to all figure keys, and the other responds and is common to all letter keys. The relative change of positions of the bars disconnects the actual transmitter in favor of an auxiliary transmitter for the time required for transmission of one signal combination. The operation provided is accomplished without the aid of storage facilities.

PATENTEnuuv 2 19m sum 1 HF 5 Fig.7

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3 or 3 INVENTORS O TO HOL STE/N NA L TEA Hen w/c ATTORNEY ARRANGEMENT FOR AUTOMATICALLY INSERTING TYPE GROUP SHIFT SIGNALS IN KEYBOARD TRANSMITTERS BACKGROUND OF THE INVENTION The present invention relates to an arrangement for automatically inserting case shift or type group signals in keyboard transmitters used in teleprinter engineering, or the like, in which each key lever of the keyboard unit is assigned a single character (complete keyboard), and in which the disengagement of the once tripped transmitter clutch is dependent upon a presetting effected in the course of the transmitter shaft rotation.

Owing to the double utilization of the employed five-unit code as customary in the case of the international telegraphic alphabet. it is necessary for the characters which are divided into two groups of types (cases), to be preceded by a so-called type group or case shift signal identifying the respective group or case when changing from the one to the other case or type group. In the case of normal quantity-produced machines the insertion of these functional signals into the sequence of transmitted text signals is effected by the manual actuation of special types of keys. By this necessity, however, the teleprinter operation is rendered more difficult and calls for a certain training of the operator.

For eliminating this disadvantage various types of embodiments of storage devices have become known with respect to teleprinting machines, with the aid of which it is possible to carry out an automatic insertion of the type group or case shift signals, with these arrangements still having the added advantage that owing to the intermediate storage which is independent of the transmitting rhythm, there is enabled a mode of printing which is individual within wide limits.

These kinds of arrangements are very costly, and due to the high manufacturing costs, are normally not installed into quantity-produced machines.

SUMMARY OF THE INVENTION It is the object of this invention to provide an arrangement by means of which it is possible without the aid of a multisignal combination storage device, to effect an automatic insertion of the type group or case shift signals.

According to the present invention this problem is solved in that there is provided a shift bar assembly which is common to all key levers and which, upon shifting the type group or case, is changed or shifted by the respective key from a first switching position into a second position. The movement of the bar effects a disconnection of the actual transmitter in favor of an auxiliary transmitter for the time required for the transmission of one signal combination. This auxiliary transmitter, in dependence upon the position of the shift bar, either transmits the one or the other type group or case shift signal combination. The rearward or return shifting to the actual transmitter is effected during the stop element of this type group or case shift signal combination, and up to this time position (i.e. the time slot for the stop element of the type group or case shift signal combination the presetting of the transmitter clutch is suppressed.

Accordingly, with the aid of this arrangement, and upon a shifting of the type group or case, there is first effected the transmission of the respective type group or case identification, which is directly followed by the signal combination corresponding to the depressed key. During this time the keyboard unit remains protectively blocked from the lack of a storage facility.

This blocking property, which at first appears to be a disadvantage, however, has practically no reaction upon the operator in the case of machines which are operated at a speed of 75 Baud or more, because in this case the maximum blocking time, as a rule, is shorter than the normally appearing highest sequence of striking operations.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained with reference to the accompanying drawings, in which:

FIG. 1 shows the arrangement according to the invention in a schematical representation; 1

FIG. 2 shows a perspective partial view of FIG. 1,

FIG. 3 shows another possibility of embodying the detail of FIG. 1 as shown in FIG. 2;

FIG. 4 shows one possible electrical variety with respect to the mechanical control as shown in FIG. 1;

FIG. 5 shows the corresponding circuit of FIG. 1; and

FIG. 6 shows the circuit relating to FIG. 1 as modified in accordance with FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the schematical representation of FIG. 1 the two key levers l and 2 are representative of the complete set of key levers as contained in a teleprinting machine, via which in a well-known and, therefore, not shown way, there is effected the setting of the selecting bars of the keyboard transmitter. Via a likewise not shown tripping or releasing bar there is effected in the course of this, upon each depression of a key, the swiveling of the supporting pawl 15 via a pull bar 18, so that the uncoupling lever (clutch throwout lever) 19, owing to the effect of the tension spring 21, is disengaged from the transmitter clutch 23. In the course of the subsequently following rotation of the transmitter shaft 25 there is fed out in the normal case, i.e. when no shifting of the type group or case has been performed, the code combination as fed in via the selecting bars, by the actual transmitter 26 via the transmitting contacts Skss and Skl to Sk5 (FIG. 5) in the conventional way either in serial or parallel form. After completion of one rotation the transmitter shaft 25 is stopped again owing to the engagement of the uncoupling lever 19, which has meanwhile been moved back by the reset cam 24 via the reset member 19a into the latched normal position, with the clutch 23.

This normally existing arrangement, within the scope of the invention, is extended in so far as instead of the hitherto conventional locking bar, there is used e.g. a set of shift bars 3 according to FIGS. 1 and 2. This set consists of two vertically

adjustable bars

3a and 3b extending along the keyboard unit below the

keylevers

1 and 2, with these bars being in connection with one another via two cross levers or. brackets 4 (only one of which is shown) which are pivoted on two firmly arranged shafts 5. These cross levers or brackets are in communication with one another via a coupling rod 4a so that a vertical depression exerted upon one of the

bars

3a or 3b will result in an oppositely directed parallel displacement of the bars in relation to one another, whereas the cross levers 4 perform a swivel movement in the course of which the coupling rod 4a is displaced in the horizontal direction.

Each of the

key levers

1 and 2 is provided with a cursor la or 2a respectively having the shape as shown in FIG. 2, so that upon depressing a key this will each time only have an. influence upon one of the

bars

3a and 3b.

The connecting bolts 4b between the one cross lever 4 and the bar 30 is engaged by a connecting lever 6 which is of a fork-shaped design at this end and which, in its center, is pivoted on a turning pin 7 and which, at its other end, is provided with a sliding bolt 6a. This bolt is in an operational connection with a two-armed locking pawl 8 which is rotatably mounted at the pivot point 9, and which is provided at its lower end. within the swivel range of the bolt 6a, with a lifting cam 8a. The upper end of the pawl 8 is provided with a bolt snug 8b. Underthe influence ofa tension spring 10, the pawl 8 is retained in a force-locking connection with the bolt 6a. In the normal position as resulting therefrom, the snug 8b is in engagement with the pawl shaped projection 11a of a threearmed shift lever 11 which is rotatably seated on shaft 13 and is being acted upon by a tension spring 14 which strives at turning the shift lever 11 in the clockwise direction. The one arm of the lever 11 ending up in the pawl-shaped projection 11a is provided below the projection 11a with an inclined portion 11b which is opposed by a correspondingly designed inclined projection a of the supporting pawl 15. The opposite arm of the shift lever 11 is provided at its end with a slide roller 12 which, upon releasing of the lever 11 by the locking pawl 8, comes into an operational connection with a reset carn plate 27a forming part of the auxiliary transmitter 27. The vertically'extending third arm of the lever 11 carries at its end a switching pin 110 via which the lever 11 acts upon the middle contact spring of a switchover contact Uk.

In the shown normal condition the supporting pawl 15 as pivoted at point 16 is in the position as shown, owing to the tension-spring action 17 acting thereupon. In this position the free end 19b of the uncoupling or clutch throwout lever 19 which is pivoted on a shaft 20, rests upon the supporting snug 15b under the action of a tension spring 21. In this latched normal position of the uncoupling lever 19, the transmitter clutch 23 is retained in a defined position on the transmitter shaft 25 when in the disengaged condition.

Via this transmitter shaft 25 there is driven the actual transmitter 26 in the manner known per se, with the actual transmitter, according to FIGS. 5 and 6, including the transmitting contacts Skss and Skl to SkS. By the same shaft there is also actuated the auxiliary transmitter 27, with the

cam plates

27b and 27c thereof acting upon the additional transmitting contacts SkZ or SkB respectively, whereas the already mentioned cam plate 27a indirectly has an influence upon the switchover contact Uk. In cases where the signals to be transmitted are coded in accordance with the international telegraphic code number 2, for example, the cam plate 27b will have the shape as shown in FIG. 1, on account of which the associated transmitting contact SkZ is opened for the time of the start element, during the third element, and for the time of the stop element. The cam plate 270, in distinction thereto, has a shape according to which the transmitting contact SkB is only permitted to close during the third signal element. This transmitting contact SkB is moreover capable of being influenced by a locking lever 22 acting upon the switching spring of the contact and which, in a predetermined position, prevents the transmitting contact SkB from being closed during the third signal element. The one or the other condition is determined by the position of the coupling rod 4a, to which there is connected in a form-locking manner the locking lever 22 capable of rotating about a pivot point 32.

The mode of operation of this arrangement is as follows: It is assumed that up to now there has been established in the type group Letters as associated with the keys 2. Since the depression of these key levers 2 which are associated with this particular type group is not linked to any positional shift of the two

bars

3a and 3b, there is performed the transmission process briefly described hereinbefore as the normal case.

However, if thereafter one of the keys 1 is actuated which is associated with the type group Figures, then via the cursor la according to FIG. 2, which is associated with this particular key lever, the 3a bar is pushed downwards. This, as already described, causes the cross levers 4 to perform a clockwisely directed swivel movement about their shafts 5. On account of this, the coupling rod 4a is once displaced towards the left in the direction as indicated by the arrow (FIG. 1), thus causing the locking lever 22 to release the transmitting contact SkB. At the same time, and via the connecting bolt 4b, the lever 6 is swiveled in the anticlockwise direction. This causes the locking pawl 8 to be swiveled in a clockwise direction in accordance with the stroke of cam plate 80, by the action of the slide bolt 6a, so that the bolt snug 8b becomes disengaged from the pawl-shaped projection 11a. The thus-released shift lever 11, under the action of the tension spring 14, performs a swivel movement in the clockwise direction, which is restricted by the slide roller 12 meeting against the cam plate 27a. In so doing, and via the switching pin 110, the middle contact spring of the switchover contact Uk is brought into contact with the spring Uk2. Owing to the special design of the lifting cam portion 8a, the locking pawl 8 is permitted to reassume the normal position subsequently to the releasing movement of shift lever 11, and under the action of its tension spring 10.

While this shifting or switching is being performed, there is effected, in the manner described hereinbefore, the releasing of the transmitter clutch 23, in that the pull bar 18, via the inclined projection 15c, swivels the supporting pawl in the clockwise direction thus eliminating the supporting of the free end 19b of the uncoupling or clutch throwout lever 19 by the supporting snug 15b. The thus-released uncoupling or clutch throwout lever 19 is swiveled in the clockwise direction by the action of the tension spring 21, thus releasing the symbolically represented clutch 23 which is now caused to engage and serves to couple the transmitter shift 25 to a not shown continuous drive. The stroke of the uncoupling lever I9 is limited by meeting of the reset member 19a against a reset cam 24 forming one structural unit with the clutch member to be driven.

Upon actuation of the set of changeover contacts Uk as described hereinbefore, the transmitting contacts Skl to SkS of the actual transmitter 26 are disconnected, according to FIG. 5, in favor of the transmitting contacts SkZ and SkB of the auxiliary transmitter 27. Accordingly, there is effected, during the tripped transmitter shaft rotation, the transmission of a signal corresponding to the

cam plates

27b and 27c, with this signal, owing to the superposition of the transmitting contact SkZ which is open during the third signal element, by the transmitting contact SkB which is closed during this signal element, consisting of nothing but mark signal elements. This code combination, however, corresponds to the type group signal Figures which thus, in the transmitting and receiving machine, automatically releases the switchover to the respective type group.

Owing to the swiveled shift lever 11, the resetting of the uncoupling or clutch throwout lever 19 to the normal position, as is effected by the action of the reset cam 24 upon the reset member 190, is prevented during the transmission of the respective type group signal combination, in that the supporting pawl 15 in the swiveled-out position meets with its inclined projection 15a against the inclined portion 11b. Accordingly, the uncoupling lever 19 will return after the attempted reset thereof to the lifted-off position due to spring 21 unhindered by supporting snug 15b, so that in this way there is safeguarded the second rotation of the transmitter shaft 25 which is necessary for transmitting the actual signal combination corresponding to the depressed key.

During the stop element of the transmitted type group of case shift signal, the shift lever 11 is returned to normal by the cam of plate 270 becoming effective at this stop element time position via the slide roller 12, and is fixed again in this position by the locking pawl 8. In this way the switchover contact Uk returns to normal, wherein the middle spring and the contact spring Ukl are in a conducting connection, so, that now the transmitter contacts Skl to Sk5 are closed again (FIG. 5). On the other hand the supporting pawl 15 is released again which, accordingly, during the next offering process (resetting attempt), latches the uncoupling or clutch throwout lever 19 in the locking position.

By the blocking of the keyboard unit, which is effected in the conventional way, together with the transmission of the type group signal, it is safeguarded that the code combination as set via the set of selecting bars will remain to be stored in an unchanged fashion. In the course of the subsequently following rotation of the transmitter shaft, this signal combination, by directly following the automatically inserted type group or case shift signal combination, is transmitted in the conventional way via the transmitting contacts Skl to Sk5, and after completion of this process, the transmitter is stopped again in the way as described hereinbefore.

If, subsequently hereto, typing is continued within the same type group or case, there is effected no positional change of the

bars

3a or 3b respectively. The respective transmission process is therefore only restricted to the respective selected combination.

Only if, by the actuation of a key 2 belonging to the other or anothertype group, the

bars

3a and 3b are again readjusted with respect to one another, there is effected in the way as described hereinbefore, the automatic insertion of the associated type group shift signal Letters. Since this combination in the third element is of the space type, the superposition of the transmitting contact SkZ by the transmitting contact SkB in the third signal element must be avoided. To this end the locking lever 22 is hinged to the coupling rod 4a. Via this lever, in the shown position of the coupling rod 4a, the transmitting contact SkB is influenced in such a way that it is prevented from following the course of the cam plate 270 and, accordingly, is prevented from closing during the third signal element. In this way there is transmitted the signal combination as given by the cam plate 27b which, by the third signal element of the space" type, represents the type group shift signal combination Letters.

Instead of the set of shift bars 3 it is also possible, according to FIG. 3, to use a toothed shift bar 28 with the inclined tooth edges thereof, quite depending on the respective type group or case association of the

key lever

1 or 2 positioned thereabove, being directed either towards the left or towards the right. At the right hand end this bar is provided with an inclined oblong hole 28b to which there is engaged theconnecting lever 6 via a pin 6b. Moreover, in this particular case the locking lever 22 is directly hinged to the bar 28, with the representation being of a purely symbolical nature. Owing to the corresponding arrangement of the teeth 280, the bar'28, when changing or being shifted from one type group or case to the other, is shifted into the one or the other horizontal final position. In the course of this the connecting lever 6, in accordance with the inclined position of the oblong hole 28b, is swiveled into the one or the other position in the course of which it, in the way as already described, redirects the locking pawl 8 in accordance with the stroke or lifting movement of the lifting cam portion 8a, and thus automatically releases the automatic insertion of one of the two type group or case shift signals. Via the locking lever 22, and each time in dependence upon the position of the shift bar 28, the transmitting contact SkB is rendered either effective or ineffective.

FIG. 4 shows another embodiment in connection with FIG. 6. By using the set of shift bars 3 according to FIG. 1, the functions of both the connecting lever 6 and the locking lever 22 are in this case performed by electrical components. To this end two switching earns 29 and 30 are firmly arranged on the coupling rod 4a, with these cams serving to actuate the microswitches M82 and M81. While the cam 29 is so designed and arranged as to actuate the switch M82 only when the coupling rod is being displaced towards the left, the cam 30 is so designed and mounted that it will momentarily actuate the switch MS] upon every horizontal displacement of the coupling rod 40. By this there is each time completed the circuit of a pull magnet 31 which serves to actuate the locking pawl 8. To this end this pawl is provided at its bottom end with an armature plate 80 instead of with the lifting cam portion 8a. Accordingly, in result of an influence upon the bars 311 or 3b displacing the coupling rod 40, the pull magnet 31 is each time momentarily energized, so that this magnet momentarily (temporarily) deflects the locking pawl 8 and, consequently, releases the automatic insertion of a type group or case shift signal in the way as described hereinbefore. Which of the two possible signals will thus be transmitted is entirely dependent upon the switching condition of the microswitch MS2 which, in accordance with the showing of FIG. 6, is arranged in series with the transmitting contact SkB of the auxiliary transmitter 27 and via which, in analogy with the locking lever 22, it is determined as to whether or not the transmitting contact SkB will become effective.

In the examples described hereinbefore, the disconnection of the actual transmitter 26, according to FIGS. 5 and 6, was restricted to the transmitting contacts Skl to 51:5, whereas the transmitting contact Skss producing the start-stop elements also remained effective in connection with the auxiliary transmitter 27. Bycorrespondingly designingthe cam'plate 27b,

the synchronizing pulses, however, could also be given on to the line via the transmitting contact SkZ, so that, if so required, together with the switching over to the auxiliary transmitter 27, it would be possible to effect a complete disconnection of the actual transmitter.

We claim:

1. A teleprinter keyboard transmitter arrangement for automatically inserting character (type) group shift signals, in'

which the individual key levers of the keyboard unit are assigned a single character and in which disengagement of the transmitter clutch, following the actuation of a key lever requiring a type group shift, is dependent upon a presetting which is effected in the course of the transmitter shaft rotation, comprising:

a. an actual transmitter for transmitting character code signal combinations;

b. an auxiliary transmitter, having a common transmitter shaft with said actual transmitter, for transmitting type group shift signal combinations;

c. a shift bar assembly common to all key levers, including a pair of shift bars coupled together for movement relative to each other into one or the other of two positions, said shift bars being caused to assume said one or the other positions by the direct actuation of a key belonging respectively to the one or the other type group; and

d. first means responsive to the relative shift of said shift bars from one position to the other for effecting a disconnection of said actual transmitter and actuation of said auxiliary transmitter for a time required for transmission of a type group shift signal combination, the position of said shift bars operating on said auxiliary transmitter to control the transmission of the corresponding one or the other of said type group shift signal combinations. said auxiliary transmitter itself effecting a return to the actual transmitter during the transmitted stop element immediately following the type group shift signal combination, with the presetting of the transmitter clutch being suppressed prior to said stop element to permit a following transmission of the character code signal combination corresponding to the depressed key.

2. The arrangement according to claim 1 wherein the individual shift bars of the shaft bar assembly, with the aid of correspondingly designed cursors associated with the key levers, are capable of being adjusted vertically in relation to one another, and wherein said bars are coupled to one another via cross levers which in turn are coupled to each other via a coupling rod operating on said auxiliary transmitter, and wherein said first means include a connecting lever operatively coupled to said shaft bar assembly which, upon each relative vertical movement of said shift bars initiates the disconnection of said actuate transmitter and the actuation of said auxiliary transmitter.

3. The arrangement according to claim 1 wherein said shift bar assembly is provided with teeth and is capable of being horizontally displaced, said teeth, in their assignment to the key as positioned thereabove, and either to the one or the other type group being provided with oppositely directed inclined portions, and wherein said shifi bar, at its one end, is provided with an oblong hole which is arranged in an inclined fashion so as to provide operative engagement of said shift bar with a connecting lever via a pin.

4. The arrangement according to claim 2 further including a shift lever and a locking pawl having one end designed as a leveling cam portion, wherein said connecting lever, via its free end, acts upon said locking pawl at the cam portion thereof and wherein said locking pawl, via its other end 1 designed as a bolt snug, serves to support said shift lever in its normal position, said lifting cam portion being so designed as to permit the pawl, upon completion of the swivel movement imparted thereto by said converting lever, to resume its normal position.

5. The arrangement according to claim 4 further including a switchover contact, a supporting pawl,'a transmitter shaft, a

first cam plate, on said shaft, and an uncoupling lever operatively connected to said supporting pawl and to said first cam plate, on said shaft, and an uncoupling lever operatively connected to said supporting pawl and to said first cam plate wherein said shift lever in a released condition as provided by the swivel movement of said locking pawl, serves to actuate said switchover contact, and wherein the supporting pawl, for latching the uncoupling lever in relation to the clutch, is retained in a disengaging position, and wherein resetting of said shift lever is effected by the first cam plate as seated on said transmitter shaft.

6. The arrangement according to claim 5, wherein by said switchover contact the transmitting contacts of the actual transmitter are disconnected in favor of the auxiliary transmitter.

7. The arrangement according to claim 6 wherein said auxiliary transmitter includes second and third cam plates and associated first and second auxiliary transmitting contacts, and wherein said second and third cam plates are affixed to the transmitter shaft which is common to said actual transmitter, and wherein the second cam plate is designed to have a shape by which the first auxiliary transmitting contact, in the course of one rotation of the transmitter shaft according to the one type group shift signal combination e.g. Figures"), is opened and closed, and wherein the third cam plate is so designed that the associated second auxiliary transmitting contact is only released to perform a closure with respect to the third signal combination element, and wherein the two auxiliary transmitting contacts are connected in parallel.

8. The arrangement according to claim 7 further including a locking lever and means for coupling said locking lever to said shift bar assembly wherein the second auxiliary transmitting contact is prevented from being closed when said shift bar assembly is in the first position.

9. The arrangement according to claim 4 further including a first microswitch arranged in series with said second auxiliary transmitting contact, and wherein said coupling means is provided with a first cam via which the first microswitch is actuated when the shift bar assembly is in the first position.

10. The arrangement according to claim 9 wherein the lower end of said locking pawl includes an armature plate to which there is associated a pull magnet, and that in the circuit of this magnet is arranged a second microswitch which during displacement of said bar assembly is temporarily actuated.

ll. The arrangement according to claim 10 wherein the means for coupling said locking lever to said shift bar assembly includes a second cam which, upon displacement of said shift bar assembly, causes said second microswitch to temporarily close during said displacement.

12. A teleprinter keyboard transmitter arrangement for automatically inserting type group shift signals, in which the individual key levers of the keyboard unit thereof are assigned a single character and in which disengagement of a oncereleased transmitter clutch is dependent upon a presetting which is effected in the course of the transmitter shaft rotation, comprising a shift bar assembly which is common to all key levers and which, in shifting between type groups, is caused to move by the respective key from a first switching position into a second switching position, the movement of the shift bar assembly effecting a disconnection of the actual transmitter and actuation of an auxiliary transmitter for a time required for transmission of a type group shift signal combination, said auxiliary transmitter, in dependence upon the position of the shift bar assembly transmits the one or the other type group shift signal combination, wherein a return to the actual transmitter is effected during the stop element immediately following said type group shift signal combination, and that prior to said stop element the presetting of the transmitter clutch is suppressed, said shift assembly including a pair of shift bars, which, with the aid of correspondingly designed cursors associated with the key levers, are capable of being adjusted vertically relative to one another, said shift bars being cou led to one another via cross levers which in turn are couple to one another vta a coupling rod, and wherein a connecting lever operatively coupled to said shift bar assembly performs a swivel movement upon each vertical movement of said shift bars.

13. A teleprinter keyboard transmitter arrangement for automatically inserting type group shift signals, in which the individual key levers of the keyboard unit thereof are assigned a single character and in which disengagement of a oncereleased transmitter clutch is dependent upon a presetting which is effected in the course of the transmitter shaft rotation, comprising a shift bar assembly which is common to all key levers and which, in shifting between type groups, is caused to move by the respective key from a first switching position into a second switching position, the movement of the shift bar assembly effecting a disconnection of the actual transmitter and actuation of an auxiliary transmitter for a time required for transmission of a type group shift signal combination, said auxiliary transmitter, in dependence upon the posi tion of the shift bar assembly transmits the one or the other type group shift signal combination, wherein a return to the actual transmitter is effected during the stop element immediately following said type group shift signal combination, and that prior to said stop element the presetting of the transmitter clutch is suppressed, said shift bar assembly being capable of horizontal displacement and provided with teeth which, in their assignment to the keys as positioned thereabove belonging to either the one or the other type group, are provided with oppositely directed inclined portions, wherein said shift bar assembly is provided at one end thereof with an oblong aperture arranged in an inclined manner to provide operative engagement of said shift bar assembly with a connecting lever via a pin belonging thereto.

Claims

1. A teleprinter keyboard transmitter arrangement for automatically inserting character (type) group shift signals, in which the individual key levers of the keyboard unit are assigned a single character and in which disengagement of the transmitter clutch, following the actuation of a key lever requiring a type group shift, is dependent upon a presetting which is effected in the course of the transmitter shaft rotation, comprising: a. an actual transmitter for transmitting character code signal combinations; b. an auxiliary transmitter, having a common transmitter shaft with said actual transmitter, for transmitting type group shift signal combinations; c. a shift bar assembly common to all key levers, including a pair of shift bars coupled together for movement relative to each other into one or the other of two positions, said shift bars being caused to assume said one or the other positions by the direct actuation of a key belonging respectively to the one or the other type group; and d. first means responsive to the relative shift of said shift bars from one position to the other for effecting a disconnection of said actual transmitter and actuation of said auxiliary transmitter for a time required for transmission of a type group shift signal combination, the position of said shift bars operating on said auxiliary transmitter to control the transmission of the corresponding one or the other of said type group shift signal combinations, said auxiliary transmitter itself effecting a return to the actual transmitter during the transmitted stop element immediately following the type group shift signal combination, with the presetting of the transmitter clutch being suppressed prior to said stop element to permit a following transmission of the character code signal combination corresponding to the depressed key.

3. The arrangement according to claim 1 wherein said shift bar assembly is provided with teeth and is capable of being horizontally displaced, said teeth, in their assignment to the key as positioned thereabove, and either to the one or the other type group being provided with oppositely directed inclined portions, and wherein said shift bar, at its one end, is provided with an oblong hole which is arranged in an inclined fashion so as to provide operative engagement of said shift bar with a connecting lever via a pin.

4. The arrangement according to claim 2 further including a shift lever and a locking pawl having one end designed as a leveling cam portion, wherein said connecting lever, via its free end, acts upon said locking pawl at the cam portion thereof and wherein said locking pawl, via its other end designed as a bolt snug, serves to support said shift lever in its normal position, said lifting cam portion being so designed as to permit the pawl, upon completion of the swivel movement imparted thereto by said converting lever, to resume its normal position.

5. The arrangement according to claim 4 further including a switchover contact, a supporting pawl, a transmitter shaft, a first cam plate, on said shaft, and an uncoupling lever operatively connected to said supporting pawl and to said first cam plate, on said shaft, and an uncoupling lever operatively connected to said supporting pawl and to said first cam plate wherein said shift lever in a released condition as provided by the swivel movement of said locking pawl, serves to actuate said switchover contact, and wherein the supporting pawl, for latching the uncoupling lever in relation to the clutch, is retained in a disengaging position, and wherEin resetting of said shift lever is effected by the first cam plate as seated on said transmitter shaft.

7. The arrangement according to claim 6 wherein said auxiliary transmitter includes second and third cam plates and associated first and second auxiliary transmitting contacts, and wherein said second and third cam plates are affixed to the transmitter shaft which is common to said actual transmitter, and wherein the second cam plate is designed to have a shape by which the first auxiliary transmitting contact, in the course of one rotation of the transmitter shaft according to the one type group shift signal combination e.g. ''''Figures''''), is opened and closed, and wherein the third cam plate is so designed that the associated second auxiliary transmitting contact is only released to perform a closure with respect to the third signal combination element, and wherein the two auxiliary transmitting contacts are connected in parallel.

10. The arrangement according to claim 9 wherein the lower end of said locking pawl includes an armature plate to which there is associated a pull magnet, and that in the circuit of this magnet is arranged a second microswitch which during displacement of said shift bar assembly is temporarily actuated.

11. The arrangement according to claim 10 wherein the means for coupling said locking lever to said shift bar assembly includes a second cam which, upon displacement of said shift bar assembly, causes said second microswitch to temporarily close during said displacement.

12. A teleprinter keyboard transmitter arrangement for automatically inserting type group shift signals, in which the individual key levers of the keyboard unit thereof are assigned a single character and in which disengagement of a once-released transmitter clutch is dependent upon a presetting which is effected in the course of the transmitter shaft rotation, comprising a shift bar assembly which is common to all key levers and which, in shifting between type groups, is caused to move by the respective key from a first switching position into a second switching position, the movement of the shift bar assembly effecting a disconnection of the actual transmitter and actuation of an auxiliary transmitter for a time required for transmission of a type group shift signal combination, said auxiliary transmitter, in dependence upon the position of the shift bar assembly transmits the one or the other type group shift signal combination, wherein a return to the actual transmitter is effected during the stop element immediately following said type group shift signal combination, and that prior to said stop element the presetting of the transmitter clutch is suppressed, said shift assembly including a pair of shift bars, which, with the aid of correspondingly designed cursors associated with the key levers, are capable of being adjusted vertically relative to one another, said shift bars being coupled to one another via cross levers which in turn are coupled to one another via a coupling rod, and wherein a connecting lever operatively coupled to said shift bar assembly performs a swivel movement upon each vertical movement of said shift bars.

13. A teleprinter keyboard transmitter arrangement for automatically inserting type group shift signals, in which the individual key levers of the keyboard unit thereof are assigned a single character and in which disengagement of a once-released transmitter clutch is dependent upon a presetting which is effected in the course of the transmitter shaft rotation, comprising a shift bar assembly which is common to all key levers and which, in shifting between type groups, is caused to move by the respective key from a first switching position into a second switching position, the movement of the shift bar assembly effecting a disconnection of the actual transmitter and actuation of an auxiliary transmitter for a time required for transmission of a type group shift signal combination, said auxiliary transmitter, in dependence upon the position of the shift bar assembly transmits the one or the other type group shift signal combination, wherein a return to the actual transmitter is effected during the stop element immediately following said type group shift signal combination, and that prior to said stop element the presetting of the transmitter clutch is suppressed, said shift bar assembly being capable of horizontal displacement and provided with teeth which, in their assignment to the keys as positioned thereabove belonging to either the one or the other type group, are provided with oppositely directed inclined portions, wherein said shift bar assembly is provided at one end thereof with an oblong aperture arranged in an inclined manner to provide operative engagement of said shift bar assembly with a connecting lever via a pin belonging thereto.