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

Arrangement for automatically inserting type group shift signals in keyboard transmitters Download PDF

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Publication number
US3617628A
US3617628A US786162A US78616268A US3617628A US 3617628 A US3617628 A US 3617628A US 786162 A US786162 A US 786162A US 78616268 A US78616268 A US 78616268A US 3617628 A US3617628 A US 3617628A
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United States
Prior art keywords
transmitter
shift
type group
bar assembly
lever
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Expired - Lifetime
Application number
US786162A
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English (en)
Inventor
Otto Holstein
Walter Herwig
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Alcatel Lucent NV
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International Standard Electric Corp
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Assigned to ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS reassignment ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/16—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of transmitters, e.g. code-bars, code-discs

Definitions

  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 1 shows the arrangement according to the invention in a schematical representation
  • 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
  • FIG. 6 shows the circuit relating to FIG. 1 as modified in accordance with FIG. 4.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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 corresponds to the type group signal Figures which thus, in the transmitting and receiving machine, automatically releases the switchover to the respective type group.
  • the resetting of the uncoupling or clutch throwout lever 19 to the normal position 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.
  • 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.
  • 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).
  • 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.
  • 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.
  • this bar is provided with an inclined oblong hole 28b to which there is engaged theconnecting lever 6 via a pin 6b.
  • 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.
  • FIG. 4 shows another embodiment in connection with FIG. 6.
  • the functions of both the connecting lever 6 and the locking lever 22 are in this case performed by electrical components.
  • 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.
  • 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.
  • 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.
  • the synchronizing pulses 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.
  • an auxiliary transmitter having a common transmitter shaft with said actual transmitter, for transmitting type group shift signal combinations
  • 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;
  • 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.
  • 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.
  • the arrangement according to claim 4 further including a switchover contact, a supporting pawl,'a transmitter shaft, a
  • 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.
  • 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
  • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Mechanical Control Devices (AREA)
US786162A 1968-01-11 1968-12-23 Arrangement for automatically inserting type group shift signals in keyboard transmitters Expired - Lifetime US3617628A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST27750A DE1289866B (de) 1968-01-11 1968-01-11 Einrichtung zum automatischen Einfuegen der Typengruppenwechselzeichen bei Handsendern der Fernschreibetechnik od. dgl.

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US3617628A true US3617628A (en) 1971-11-02

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US786162A Expired - Lifetime US3617628A (en) 1968-01-11 1968-12-23 Arrangement for automatically inserting type group shift signals in keyboard transmitters

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US (1) US3617628A (zh)
AT (1) AT311433B (zh)
BE (1) BE726784A (zh)
BR (1) BR6905520D0 (zh)
CH (1) CH489967A (zh)
DE (1) DE1289866B (zh)
FR (1) FR2000149A1 (zh)
NL (1) NL6900392A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968324A (en) * 1974-03-18 1976-07-06 Siemens Aktiengesellschaft Circuit arrangement for synchronizing the letters/figures levels of several input and output devices in teleprinters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932932A (en) * 1933-06-02 1933-10-31 Creed & Co Ltd Start-stop telegraph system and apparatus therefor
US1974307A (en) * 1932-09-02 1934-09-18 Creed & Co Ltd Case signaling mechanism for keyboard controlled telegraph apparatus
US2559637A (en) * 1948-04-05 1951-07-10 Creed & Co Ltd Keyboard controlled telegraph apparatus
US3306417A (en) * 1964-05-04 1967-02-28 Olivetti & Co Spa Keyboard mechanism for generating code with selectable code member sets
US3459890A (en) * 1965-05-20 1969-08-05 Int Standard Electric Corp Storage device for use in teleprinters

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1974307A (en) * 1932-09-02 1934-09-18 Creed & Co Ltd Case signaling mechanism for keyboard controlled telegraph apparatus
US1932932A (en) * 1933-06-02 1933-10-31 Creed & Co Ltd Start-stop telegraph system and apparatus therefor
US2559637A (en) * 1948-04-05 1951-07-10 Creed & Co Ltd Keyboard controlled telegraph apparatus
US3306417A (en) * 1964-05-04 1967-02-28 Olivetti & Co Spa Keyboard mechanism for generating code with selectable code member sets
US3459890A (en) * 1965-05-20 1969-08-05 Int Standard Electric Corp Storage device for use in teleprinters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968324A (en) * 1974-03-18 1976-07-06 Siemens Aktiengesellschaft Circuit arrangement for synchronizing the letters/figures levels of several input and output devices in teleprinters

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Publication number Publication date
NL6900392A (zh) 1969-07-15
BE726784A (zh) 1969-07-14
CH489967A (de) 1970-04-30
DE1289866B (de) 1969-02-27
AT311433B (de) 1973-10-15
FR2000149A1 (zh) 1969-08-29
BR6905520D0 (pt) 1973-06-07

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AS Assignment

Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023

Effective date: 19870311