DE1965430A1 - Device for controlling a data reader and a printer connected to it - Google Patents

Description

Br-ϊηι

6142

pl-iug. ViCJSGBa If
6 Fianidmi a. M. 1
Paikslxaße 13

GEKBHAL · EEECTRIO OQBiPMIY, Schenectady, KY, YStA

Device for controlling a data reader and one connected to it connected printer

Bie invention relates ein® means for controlling an Baten reader * is controllable · "that he successively on a Aufzeicnnxingsträger atifgeaeielmete Zeicken" reads serve some characters DTIE (iraekliaren leiehen "drtickfeare Baten represent tjnd other E! _S not calibrate dretckfeare characters not represent printable Batenburg X IND Befehiszeichen sor control the other · operations as Bnrtckoperatianen an a * £ serving readers comprise connected Brtickers. _t is controllable _e he dal who requested the read from. readers printable characters AMS printed and non-printable command character _t which have been read by the reader »appeals«

The reader can be a laughing stock reader, ™ nit that. Punched tapes can be read, as they are used in teleprinters. These punched tapes are also used for data processing purposes and not only in teleprinters Hole combinations punched out. Characters that should not be printed - they are referred to below as "non-printable characters ^tT: - are also contained in α em tape" These characters can be tim commands, which are referred to below as command characters, and a printer so control that he leaves a place free

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runs back that it will print at the beginning of the line (Carriage return), transfers to a new rope These commands require mechanical operations and movements.

of the printer «

Some of these mechanical operations can take considerably longer than normal; to find a printable sign “AuL'erden. These mechanical operations must be completed before further printable characters can be accepted and processed by the printer. So far one has. ' to adapt to these iiaeriaan ^ eri operation times that a printer needs to carry out: ue chemical operations, non-printable "loose" switches. " ^: Immediately after a command sign for such a MecrSiaa & ische operation in the punched tape = punched "These erase marks are characters that are left to iron printers if they do not display any printable characters" The American Standard Code fair Information Interchange (ASCII) is preferably used here as Io ohstra if encode: et. In this code, the deletion sign simply consists of a locit in all nine salmon halls. The Eöschzeichszi is often used to correct a tape by erasing incorrect information that was punched in during the production of the perforated tape.

In practice there are numerous difficulties and disadvantages, if the delete characters are only delay times for Adaptation to the speed of the printer should be trained. * For example, when punching, entering a- Lctec-h- be forgotten, and aiesea procedure / expensive in terms of the punched tape material and the l't ~: - gestation period ,. if the 3} £ -; eran scanned by the punched tape a distant place or in an odsr ai: s einssr. Eöari speed arfeeitsp eicher one · digital, ri are to be transferred «With the internal Dat

009830/1610

BAD OWGLAL

In a digital kitchen system, the punch marks mean a Waste of the riosfable computer time because the computer does this artificial immersion times are not required.

!! According to the invention, these difficulties are tifit in that the reader is controllable in such a way that it reads characters on the basis of individual lead signals and leads to subsequent reckoning characters, and the control device contains a control device which can be operated in such a way that it the reader advance signal that the control device contains a decoding device which is operable in each zoom position in such a way that it detects the type of each character before the reading and advance operation, that the control device on the basis of the detection of any error character of a predetermined Art can be operated by the liekodiervorrichtung that rie immediately generates a forward signal for reading this command character and a forward si *: ϊ; £ χ! for a following printable seichen a first pre-marked ..:.; ze period of time delayed, which is so dimensioned that. ^: the printer can execute the non-printing command meanwhile.

This means, caf ax Pteu-: re: .i: direction after the I0r: 'inc.ur. _t: iramer only AAnn automatically Vernöf'urur.tjen in the operation of the reader inserts, when an instruction occurs, the time consuming mechanical Cperation AEEU I'ruckers veria2 ~ .. 't. "yacei is the delay urif ·" irr.r, he r.ur with printable characters ο ac, uic act on the time-consuming command fclfr · - ■:., since the Ar.la ^ e is in the position of not having x printable characters the delay-erur.trszeit to process ::.

V-'eiter trainingun _s s of the λγΓir. June ~ are marked in Vnteraiit ^ riicr.en.

Tie Srfincuy ^ ·. and their ". * eiterbilv-.u:.,. en -.verden ir. foir-naer. based on from üeiohr.ur ;. ur. r.before besc ::? * i- ^ i: en, uie a cevcrüujte.- ·

009830/1610

Represent embodiment.

Pig. 1 is a black diagram of a device according to the invention.

Pig. Figure 2 is a detailed block diagram of a portion of the Pig controller. 1, which contains the components that generate the port switching impulses of the reader.

Pig. 3 is a block diagram of logic components and delay elements which are contained in the traffic jam device according to FIG.

In ^:? ifc * 4 are ' ^v chaltun.': ~ components are shown that are used on the Z-Ir-SGUcun.fr of the read and forward signal, as a dsm one. Liin.r? Jng the switching -, :::; j after Pig. 2 is fed.

The device l &o;: -in »ι contains a perforated strip · -Le aer 1-10, in ler ~~. ■ -. '.. cn un = eijien nhotoelectric punched-part reader act. "■;.;. Η _ä at dec the presence of holes 121 ϊλ punched tape on: L' -. Rcr.gang of light through this Leeher feat ^ e- "represents T / iru, Ler operation dee reader 1-10 is f ^ euerein" passing 1-12 and 1-25 durch'eine ntart-Rtop'nteuereinhei- ¹ '-13 ausseiest "Jeaesnal, v / em: the reader 1-IO reads a new character, this is d \ - raw a decoding 1-23 monitored and decoded. The Dekonierer / irkt Oev that you fire device which erlauf- the "/ and read ports 1-25 and the reader control units 1-12 contains, determines which operation the connected Mesh '-'Vl _t at which it is un. Aas printing unit of a f-err.-sc:. .reibers nanaelr can execute SO21. ':' hen dan mark a printable Zeicnen or Bei'ßhisseichen is that for Lruk "ker 1-11 übertna _f: s should v.eraen , then the data gates '<-2L are ge ^ f.'ne "n" .r. ri: -: ■ information to be processed by Ln Acker is to be transmitted, -Vc-nn the character ur; -.a command which is executed by the printer for a relatively long time

009830/1610

takes, a delay circuit 1-24 with a long delay time is operated to delay the transmission of the next printable character. If the command specifies an operation that the printer needs less time to complete, a short-term delay circuit 1-28 is triggered, which delays the next read and advance signal.

When the printer receives 1-11 character data, it sends back a control synchronization signal to the reader controller, which triggers the next read operation of the reader. When the decoder 1-23 detects a deletion, a fast forward circuit 1-26 is activated via a comparison circuit 1-32 and a jump circuit 1-31, which lets the paper tape advance by one character without the control synchronization signal from the printer.

The rectangle symbols in FIGS. 2, 3 and 4 represent bistable flip-flops, which are also called "flip-flops". Each flip-flop has two output terminals, such as terminals 8-14 and 8-56 at the bottom of the flip-flop 8-STEP in FIG. 2. Line 8-14 is the set output terminal at which a 1-signal occurs when the .Flip-flop is "set", and a 0 signal occurs when the flip-flop is "reset". Terminal 8-56 is the reset terminal which has a 1 signal when the flip-flop is reset and which outputs a 0 signal when the flip-flop is set. The other five lines leading to the flip-flop are input lines. The line 8-52 represents a set input. A 1-signal appearing on this line immediately toggles the flip-flop into the set state. The input line 8-54 represents the reset input. If a 1-signal occurs at this input, the flip-flop is reset immediately. The upper left input, which is connected to the HICHT element 8-12, is a "set control input", and the upper right input 8-58 is a "Rüokse.tz control input". As indicated by the small circles on the setting tax

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inputs is indicated, the effective state of these control signals is the 0 state «If one of these control inputs is in the effective O-state, the flip-flop by a trigger signal, which is on the middle input line CPII occurs in the direction determined by the tax in transit State tilted. A 0 signal is created here by reference potential and a terminal at which a 0 signal is always present, represented by an earth symbol. A 1-signal is replaced by a negative Potential and a connection at which a 1-signal is always present is present, e.g. the connection 8-58, represented by a minus sign in a circle.

Small open circles represent ITegationsstellen is _s and UFD members are shown as semicircles. Semicircles with several inputs and circles on the input side therefore represent NOR elements and semicircles with several inputs and an output-side circle represent HAHD elements, semicircles with only one input and an input-side or output-side semicircle represent KICHT-fflieder.

When the device according to the invention is switched on should, a key is pressed manually, which causes the Control unit 1-13- "the reader control units 1-12 a trigger signal feeds. The reader control units 1-12 according to Pig. 1 included the circuit according to FIG. 2.

After 3? 2, the start signal given by the button becomes a Terminal 2-39 fed to the one. Entrance of a! AlJD member. 8-10 represents. Since s is the output signal of this FAIJD element via a NOR element 8-11 and an ilCHf element 8-12 to the setting / Control input of the flip-flop 8-STEP fed “The signal GPII fed to the middle trigger input of the flip-flop 8-STBP is a clock signal emitted by a central clock generator (which is not shown). When the next clock occurs

impulses CPII, after the NOT-Slied 8-12 the setting control - "-: ■ nal has given up, the Plipflop 8-STEP is set - 'Daduroh

appears at reset output 8-56. 0-signal and a 1-signal at the exit gate 8-40. The O-Bignal am.Anschluß 8-56 is as jOatendurehKchaltsignal for opening (not shown) of electric gates at the output of the reader used to read dassieh in! "Esestellung the paper tape reader data characters contained and transfer. The data are fed to a processing device such as the printer, which is connected to the punch tape reader. The data ports are shown schematically as blocks 1-24 and the printer is labeled 1-11 (Pig. 1). The ^phrase appearing at Eticksetzausgang 8-56 O 'signal is also supplied to the reset control input of the flip-flops -JJ 8-RS _f which causes the flip-flop 8-RS is set when the next clock pulse occurs CPII. The I signal, which occurs as a result of the setting failure 8-60, is fed to the printer 1-11 as a control signal, which enables the printer to record the information that has been configured from the reader via the rate gates. These signals, the "data hold signal at output 8-56 and the printer control signal at output 6 ~ 60" are generated in quick succession »

In the meantime, the output from the set output of the flip-flop 8-3CBP is output Signal over connection 8-14, an IIAHD-Glred 8-13, a KICHS element 8-14, a differentiating element 8-18, an ITAITD element 8-15 and a KTCHT link "8-16 directed ^ so that on öer Line 8-62 a sharp pulse occurs. This impulse will fed to the punched tape reader as a forward Pteuerlnpulse and causes the punched tape un a character or a Step forward so that he is in a position; in which the next character can be read. == - "

Even though the flip-flop 8-SI ¹ KP was excused from both the forward signal 8-62 and the "I ^> ruci: erstea; orsi £ 'nal 8-60: over the? Lip-, flop 8-2S aiiElf: r _u , the advance of the perforated tape by one step or one character position takes considerably longer than the transmission of the prucker control signal 8-dOi, Der

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The printer therefore receives the character before the paper tape has moved forward by one character. - *

. . After the printer has received the control signal via the opened by the signal on the line 8-56 data gates the data and the line 8-60, he sends to the control device via a line 8-54 ^& i ⁿ pulse signal back that of the reset inputs Flip-flops' 8-STEP and 8-RS is fed so that they are reset and prepared for a new cycle. Then the printer next sends back an α signal RKO which, via the flip-flops and logic elements shown in FIG. 4, causes a "read and forward signal" to appear on a further input line 4-35 of the NAND element 8-10 that triggers the cycle just described again. If several printable characters follow one another, the forward and read signals are generated at regular time intervals without delay. However, if commands occur which the printer needs a longer time to execute, the circuits shown in FIGS. 3 and 4 cause the next forward and read signal 4-35 to be delayed. ■; ■ '■,

"If the punched tape contains DEL deletion characters, they will not transmitted to the printer, so the printer also does not Sends back control signals based on these characters. The pre ^ - Running signals resulting from the appearance of delete characters are generated by a circuit described in .Pig. 2 is shown and a FICHT element 8-33 and a NOR element 8-34 contains that the NAND gate 8-13 a sustain signal over feeds a line 8-35. Since the NOR element 8-34 as another Input signal a (packet pulse train CEI is supplied as long as As in the reading position of the paper tape reader release symbols appear, the advance signals are generated with the frequency of the clock pulse train CP1. This can be significantly faster, soaps than the normal reading speed for printable characters, because the printer does not have to take action.

009830/1810

BATH

The flip-flops 4-RNCS and 4-PC shown in FIG. 4 are both reset by the first signal emitted by the printer via a line 8-54, which indicates that the printer has received data. The second signal RNC emitted by the printer is fed to the trigger input of the flip-flop 4-HETCS. Since there is always an 0 signal at the set control input of this flip-flop, this flip-flop is set by the trigger signal RITC. The 0 signal which then appears at the reset output of this flip-flop is "fed via a NOR gate 4-11 to the trigger input of the flip-flop 4-PC, to which an M set control input signal is normally fed so that it is also set". The 0 signal that then appears at the reset output of the flip-flop 4-PC is fed to a NOR element 4 ^ 18., a NAND element 4-20 and a NOR element 4-21 to generate the NAND gate 8-10 in Fig. ' 2 is returned. The original signal RNC, which is a 1-signal, experiences a reversal (negation) in "each flip-flop and in the elements 4-11, 4-18, 4-20 and 4-21, so that on the line 4- 35 a 1-signal appears again. ■.

The read and advance signals are normally generated in a regular sequence. However, each "character is t decoded so that its type can be determined, and 'if a printable character waiting to be read and a the character preceding this printable character was a command character requesting an operation to perform it the printer takes a relatively long time, the generation of the read and advance signal = "for the waiting delayed printable characters. The delay signal is in de.r Circuit according to Fig. 4 inserted by a 1 signal, _das the connection 3-LD of the NOR element 4-18 is supplied '. This 1 signal remains available until the end of the delay period in which Time "this terminal is supplied with an 0-signal which

! , 009830/1010

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the generation of the read and advance signal by the NOR gate 4-18 allowed. The delay signal at terminal 3-LD generating circuit is in the lower part of Pig. 3 and will be described in more detail later. This at the connection 3-LD occurring signal is also called "long-term delay signal" in contrast to a "short-term delay signal" called, which will be described later. Typical command signals which require a long delay in the operation of the punched tape reader are the line feed signal IP, the switchover signal ESC, the return signal BS and the carriage return signal CR. These signals are command signals. The changeover signal BS can be used to change the color of the ribbon " 'be used.

The through the NOR gate 4-18 in Pig. 4 effected control of the Delay time is only required for printable characters. Therefore, when the delay timer is in operation, for non-printable characters a pole of instantaneous reading and Forward signals are generated. Only if a printable character occurs during the delay time and is to be processed, 'the tape reader must be delayed by the NOR element 4-18 will. The Plipflop 4-PC "is therefore controlled so that it is set to indicate that a character is considered a printable P character has been decoded and is waiting for the next character to be read by the punched tape. Until such a printable character appears, the Plipflop 4-PC remains reset, so that it feeds a 1 signal to the upper input of the NOR element 4-18 and prevents this NOR element from emitting a 1 signal. gives. When a printable character occurs, the plip-flop occurs 4-PC set via the NAND element 4-1Q and the NOR element 4-11 «'/., The NAND gate 4-10 by decoding the sixth and seventh looph places of the previous character won * Signals fed. In the case of the hole- = · V which is preferably used here code contain all printed characters in the sixth upper seventh Hole or a hole in both holes. «If a © the-

. 00983071610

EER combinations is available (it is recalled that a hole a NwIX means) _s are the MID 4-10 member is an O-signal to the nachgefjohalt.ete hoei-ßlied from 4-11. One of these -: combinations occurs when the character is not a printable character & b @ n , but a deletion character, where a hole is punched in all perforations & »Furthermore: one of the inputs of the WÖR» & song 4-11 is a Losehsigiial DEL SE, which indicates the occurrence of a Löechzeicheneiis »If therefore a delete signal. occurs j mui iss IOl = Sliefl 4-11 sin. Emit an O signal ₅ that indicates that the '£ @ ic & @ n is not a printable character * The third input signal of the ITQR song 4-11 is, as already mentioned, € as Output signal; from the reset output · λ output of the flip-flop 4-HNGS _β This signal determines the exit ^ time of the HOR-Glieä 4- * 11 ^ output - a printable character indicating signal that the flip-flop 4 = PG as a trigger signal "This plip-flop is set every time because a 0-3 signal is constantly present at its set control output, except when a release command sign" = signals SP. This is the only other non-printable character that is indistinguishable from printable characters ₉ and zv / ar by the fact that no holes are punched in the superscript 6 and T "

Every time the next character is decoded is a non-printable character, 'which does not have any- | Requires a closing delay appears immediately at the next, signal RNC, which is the input of flip-flop 4-RNCS a forward and read signal is supplied on line 4-35. This is done by the reset output of the flip-flop 4-RHCS causes the line 4-37 to a HOR-GIieö 4-19 is fed. The other one, ': ang' signals are received by the 1I0R element 4-19 from members 4-1-3 and 4-16 as well as 4-14 and .4-17 * be passed through the signals that indicate that it = is at the next character is an illegible character ^ and none of the .command characters require a delay. The presence of a readable character is thus through the inputs 6 and 7 of the NOR element 4-13, the absence of a line leading-

009830 / Ί610

Push character by the signal IP fed to the NOR element 4-13 and the absence of the command signals ESG, BS and CR determined by the three inputs of the! TOR gate 4-H. The desired 1 signal at the output of the NOR gate 4-13 is negated and for the presence of a cancellation signal ^ DJEL ,. in the NAND gate 4-16 checked before it is fed to NOR gate 4-19. The output signal of the NOR element 4-14 becomes simple negated in the NOT element 4-17, before the IIOR element 4-19 is fed. Therefore, if the NOR condition of the NOR gate 4-1-9 is fulfilled, including the Plipflop 4-RNCS through the Synchronization signal RIIC is set so that it is on the line 4-37 emits an O signal, an instantaneous read. and forward signal · 4-35 generated.

However, if the next character represents an instruction requiring a time delay or a printable character, the read and advance signal must be generated over a channel which does not contain the FOR gate 4-19. As already mentioned, the read and advance signal is generated via the NOR element 4-18 if it is a printable character. In other cases, however, the advance and read signal can be generated via the elements 4-12 and 4 -15 can be generated. In all Fäl- len ", in which a long time delay is required, W NAND gate 4-12 from the circuit of Pig. 3 3-13 via a line at the beginning of the delay time, a signal supplied to a first read and ₅ Generate advance signal for reading the command character for which the delay is required.

In certain cases only a shorter delay time is required. For example, if a sequence of newline characters occurs without any printable characters in between, 'becomes for the second and subsequent line feed commands LF

009830/1810

BATH

1985430

switched on for a short delay. The long delay time can, for example, be equal to eight or nine times the period of the printable character, while the short delay time about two and a half times the period of the printable character ■ can be. The period of a printable character can be in the large. ;; order of 3 "0 milliseconds *

In this embodiment, the short-time delay timer only takes effect when a line feed command LF immediately follows a preceding line feed command without a printable character intervening. At the end M of the short delay time, a signal on the line 3-42 appears as a further input signal of the NAND element 4-12. This signal can be immediately aware of the members 4-15, "4-20 and 4-21 are effective in that a read and Vorlaufsig-; nal is generated by a 4-35 However, if the ^{vorausgehen-:} triggered the line feed command LF. long delay time has not yet expired, which is indicated by a long delay signal 3-LD, which is fed to an input of the NOR element 4-15, then this signal is blocked by the NOR element 4-15 until the end of the long delay time. In any case, the second and each subsequent line feed command LF is not processed until the "signal" appears at terminal 3-42 due to the expiry of the short delay time. ":""I.

In the following the short-term and long-term delay ' circuits according to FIG. 3 described. !

The logic that for one is the order of line feed:

command characters LF and printable characters and on the other hand fixed- ·

sets whether a certain command LF affects the long-term delay

circuit or the short-term delay circuit must trigger, "

is shown in the upper half of Fig. 3 and contains

a 3-PCLF flip-flop. The flip-top 3-KJLF is used every time; starts when in the reading position of the tape reader

0098 30/1610 _bä d

printable character is detected. This is "caused by a DruckzeichenemTigr.al (a signal which represents the presence of a printable character) that the get input of the flip-flop 3-PCLF from the set output of the flip-flop 4-PC (in Pig." 4) via the line 4- 36 is fed. The flip-flop 3-PCIjF but is reset each time a line feed character LF occurs in the _s reading position of the punched tape. The line feed signal LF is fed to the reset 8 expensive input of the flip-flop 3 - PCLF via a HICHT element 3-44. The point in time of this reset operation is determined by a forward signal at the trigger input 8-50 of this flip-flop, which an ITICHT element 8-47 in the circuit according to FIG. 2 emits simultaneously with the occurrence of the read signal on line 8-58. The flip-flop 3-PCLF therefore always indicates "" whether a printable character has occurred after the last line feed command, the flip-flop being set in this case and otherwise being reset. CLF only determines the presence of a line feed command character LF with the aid of a signal LF which is fed to the set control input of this flip-flop via a NOT element 3-46 Flip-flops 4-RNCS, which is fed to the trigger input 4-38, which means that the reset output of this flip-flop 3-CLF feeds an 0 signal to both NOR gates 3-27 and 3-2.0, depending on whether the last signal LF is followed by a printable character, the output signals of the flip-flop 3-PCLF; the hold function of the NOR elements 3-20 or 3-27 «If after the last command LF a printable Character occurs, the flip-flop 3-PCLF is set, and the 0 signal which then occurs at the reset output of this flip-flop is fed to the NOR gate 3-27 in order to trigger the long delay timer. If the last line feed or row LF is not followed by a printable character, then the flip-flop

: ^^ ^{? ί; ΐ>: &} " ⁵ 009830/1810 ';

3-PCLF reset and that at the set output of this flip-flop 5-PCLF occurring 0 signals are fed to the IGR element 3-20, see above that the short delay timer is triggered.

Xj & hn the long-term delay timer is triggered via the NOR element 3- * 27 ₉ ', the output signal of this ITOR element 3 ~ 27 is fed to the ret zs expensive input of a flip-flop 3-LD2 via an IFAHD element 3-12 ο On the other hand, when any other of the command lines ESG, BS or GR occurs which requires a delay, a signal is fed to the set control input 4-34 of a flip-flop 3-LDt Line 4-34 »The 1-signal which is then emitted by the set output of flip-flop 3-LD1 is fed to the second input of IJAND element 3-12 in order to set flip-flop 3-LD2 is set with the next clock pulse CP-II. The then occurring at the reset output of the flip-flop 3-LD2 is fed to the η em set control input of a flip-flop 3-LD3. If a clock pulse CP-I then occurs at the Flip-flop set, so that it should be on em Setzausg ^ ng 3-13 one - off signal · are. This 1-signal is fed to an input of the -NAilD element 4-12 in FIG. 4 ,, "- ■■ -""·

This 1-signal from the set output of the flip-flop 3-LD3 is also fed to the input of an ITOR element 3-11, so that | B of this IIOR element 3-11 outputs an O-Bigr.al. Since a Q signal is synonymous with a ground connection, the timer line, which is connected to a timer capacitor 3-15, is grounded so that this capacitor discharges and the timer ₉ is reset if a full clock period has not yet expired «At the same time, the 0-O signal occurring at the reset output of the flip-flop 3-LD3 also discharges a timer capacitor 3-16«

0Q9830 / 1610

■■ "" .-. "■; ■ '- 16 -. ■■■■■■.-.-....

Line 3-13 occurring 1-set output signal is also the Reset inputs of flip-flops 3-LD1 and 3-LD2 supplied, ' to cause these flip-flops to be reset. As a result, the set control input signal of the flip-flop 3-LD3 disappears. The 0 signal from the reset output of the flip-flop 3-LD3 is returned to the reset & control input of this flip-flop, so that when the next clock pulse CP-I this flip-flop 3-LD3 is reset. Of the. negative 0-1 transition of the signal at the reset output of the flip-flop 3-LD3 is passed through a capacitor 3-16 and a resistor 3-17 differentiated and via a resistor 3-18 and an ITAND element 3-10 an input of the NOR element 3-11 as a 0 signal fed. Since the other input of the NOR element 3-11 at Resetting the flip-flop 3-LD3, also supplied with an O signal becomes ,, this NOR gate 3-11 now gives a 1-signal via line 3-40 to start the delay time, which is effected by the timer circuit. This is the long-term delay signal 3-LD, which the ITOR element 4-18 4 is supplied as a 1 signal. At the moment of occurrence a 1-signal on the line 3-40, this is via the capacitor 3-15 and a connected resistor fed to the upper input of the NAND gate 3-10. The ITAND- '■ Element 3-10 therefore sends a 0 signal to the HAIID element for as long 3-11 until both capacitors 3-15 and 3-16. have charged so far that the charging voltages through the ITAHD element 3-10 can be recognized or recognized as 0 signals. The loading speed of the Eonäensator 3-15 is changed by a changeable Resistance 3-19 controlled. The same purpose serves a Resistance 3-1-7 with regard to the capacitor 3-16. "If both input signals of the IIAHD element 3-10" represent 0 signals, the HANDrCIied 3-10 gives a 1-signal to the NOR-Glied'3-11. so that it emits a 0 signal and thus the .'- delay '■ terminated since the beginning. '

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π -

- The structure and mode of operation of the short-term delay. Timer is similar to the construction and ^d: he operation of the LangzeitverzOgeruhgrZeitgebers described. The output signal of the NOR gate 3-20 is fed to the triggering input of a flip-flop 3-SD1, the set control input of which is constantly assigned a 0 signal (which is represented by a Srdsyinbol) in order to keep this flip-flop in the set state »The Ö signal appearing at the reset output is sent to the set ^; control input of a flip-flop 3-SD2 supplied. The flip-flop 3-SD2 is then set when the next clock pulse CP-IX occurs.

. -gang (3-48) occurring 1-signal is fed to a NOR gate 3-24, so that this NOR gate emits a 0 signal, which discharges and resets a timer capacitor 3-25. At the same time, the 0 signal from the reset output of the flip-flop 3-SD2 is fed to a timer capacitor 3-21, which discharges and resets it. In the meantime, the 1 signal from the set output of the flip-flop 3-SD1 is fed to the flip-flop 3-OLF via a NAND gate 3-29 and a NOT gate 3-30, which resets this flip-flop, so that the release signal from the release input of the flip-flop 5-SD1 disappears and this flip-flop 3-SD1 is reset by the 1 signal from the set output 3-48 of flip-flop 3-SD2. So that the flip-flop 3-SD2 upon occurrence of the next clock pulse OP-II is reset to trigger again to the delay time. As a result, the Q signal from the reset output of the Flipflops'3-SD2 lwird ⁱ "supplied to its own reset control input. The Set control input of a flip-flop 3-SD3 to send an O signal

. guided. Resetting the 3-SD2 flip-flop causes demi Capacitor 3-21 also has a 1 signal and the lower input of the NOR element 3-24 is supplied with an O signal. That the [ Capacitor 3-21 supplied 1-Sigiial is on the downstream-'taten Input of a NAND gate 3-23 switched through and W- · has the effect that this NAND element emits a "" _ O-signal. a ^ Hence, both inputs of the NOS-Glledes 3-24 O-signals are supplied,

so that this NOR element emits a 1 signal. This 1 signal is used by capacitor 3-25 . upper input of the ITAÜD member 3-23 switched through. The NAND gate 3-23 continues to emit a 0 signal, which is fed to the triggering input of the flip-flop 3-SD3, and continues until both capacitors 3r-21 and 3-25 have charged to the point that the charging voltages are applied the NAND gate 3-23 act like 0 signals. The charging speed of the capacitor 3-25 is controlled by a variable resistor 3-26. A resistor 3-22 serves the same purpose with regard to the capacitor 3-21. If now both inputs of the IfAND-GIi ed 3-23 O-signals are fed, a 1-signal appears at the output of the NAND-element at the end of the delay time and tilts the Piipflop 3-SD3 into the set state, whereby it is simultaneously the short-time delay signal 3-42 represents which is fed to the circuit according to FIGS. 3? 4 described above.

BAD OPHGINAL

009830/1610

Claims (1)

> 1985430 Claims Means for .Steuern a data reader which is controllable so that it successively _s reading on a recording medium recorded mark of which some characters, the printable characters, printable data representing and other characters, non-printable characters ₉ nieht printable data DAR · ■ places and command characters for controlling operations other than printing operations of a printer connected to the reader, which; can be controlled such that · it prints out the data read by the reader printable characters and non-printable command characters that have been read by the reader responsive characterized geke η η ζ η e t verifiable that the reader "(1-10) so is controllable, "Sat it reads due to individual supply signals to mark and precedes nachfolgenden'neuen sign that a control device (1-12, 1-25) included in the control means which is operable _so-> that they the reader preamble signals ^ supplies that the control device contains a Dekoäiervorrichtung (1-23), which is operable in each character division so that it detects the type of each character before the reading and forwarding operation that the control device based on the pesting of some sort of command of a predetermined type the decoding device can be operated in such a way that it immediately generates a lead signal for reading this command line and a lead signal for a subsequent printable character has a first v ordelayed for a certain period of time, which is so named that the printer can carry out the non-printing command during this period «, 2, device according to claim V, ä ad α rc "ti ^ g β characterizes" that the printer (1-11) can be operated in such a way that it always emits a control signal "when it receives a command character or data one read by the reader (1-10) 009830 / lato printable character, and the control device (1 - 12, 1-25) can be operated in such a way that the advance signals are sent to the Reader based on the control signals from the printer. 3. Device according to claim 1 or 2, characterized in that that the control device (1-12, 1-25) can be operated in such a way that it sends undelayed advance signals for any non-printable characters that do not belong to the predetermined type of command characters identified by the decoding device (1-25) has been determined during the first predetermined delay period, outputs, so that these non-printable characters are processed without delay. . · " 4. Device according to one of the preceding claims, characterized in that the control device (1-12, 1-25) based on the detection of a second command character of the predetermined type of command character during the first predetermined delay period is responsive to immediately generate an advance signal to to read this command character and trigger a new delay period before sending a lead signal for a following releases printable character. 5. Device according to one of the preceding claims, characterized in that the control device (1-12, 1-25) responds to the detection of a command character of the predetermined type of command character when this follows a command character immediately without an intervening printable character that it delays the advance signal by a predetermined amount of time, which is shorter than the first predetermined period of time, before it enables the advance signal to read the following command character. 009830/1610 $ * Device according to claim 5 »because you can tell that this command character is the command for the line prefix operation of the printer (t - 11}). 7 «device according to one of the preceding claims 2-6, characterized t, * that the control device (1 - 12, 1 - 25) independently of control signals from the printer (1 - 11) can be operated in such a way that it is the Reader (1 - 10) always supplies advance signals when the decoding device (1 - 23) detects a non-printable character, which is not a command character, to be transferred to the printer. ^ 8. Device according to claim 7, characterized in that that the control device (1-12, 1-25) can be operated in such a way that si © the advance signals very quickly when the decoder generates non-printable characters that are not commands. 009830/1910