DE2247311A1 - ADDITIONAL DEVICE FOR A TYPEWRITER - Google Patents

Description

8378

Kara-Kount Inc. Pine Bluff (Arkansas, V.St.A.)

Additional device for a typewriter

The invention relates to a device that is used as an accessory to a conventional typewriter and title authors in the printing industry make the layout of printed works easier.

Layout designers in the printing industry, e.g. the authors of titles in newspapers and magazines and of captions and in general'Layouter for all types of advertising and other printed works should be used in the layout Finding a compromise and balance between different requirements of the texts to be printed.-This includes the choice of words and phrases, the font and the font size such that a desired psychological and aesthetic effect is achieved. Since there is a risk that the layout is imprecise, ' Proofs are produced and, because of them, the sentence must often be changed and a test proof again getting produced. Therefore, an important object of the invention is to provide an apparatus and a system that enables the layout artist to use a selected font to use the horizontal and vertical extension of the sentence exactly

309817/0712

determine. It is also an object of the invention to provide the layouter with an additional device for an electric typewriter, which enables the production a "hard copy" allows for retrieval, classification, sentence changes, deletion, Subtraction and visualization are always available when the layouter switches between the different in Question coming words, font sizes and fonts> make a selection.

A writer of texts to be printed requires the fonts and font sizes to select a publication in certain parts aind _f the length of each line, for example, is limited by the column or page width. The subject matter of the invention provides the author with a device with the help of which he can calculate the length of each line when using different fonts and different font sizes. The sum of different combinations of fonts is calculated with the help of electronic memory blocks. The different fonts are selected with the help of a circuit arrangement. As a result, the author can calculate the total cone of each combination of letters for all the fonts and font sizes programmed in the memory blocks. In the system according to the invention, multiple circuits are used for a practically usable number of memory blocks, as well as a 'plug-in' modular arrangement which enables the rapid exchange of memory blocks and thus a replacement for old ones. Fonts related information or a calculation for various fonts that are not normally used. For this purpose, a special, programmable permanent memory is used, which is erased at the point of use and electronically reprogrammed

3098 17707 12 ,,

22Λ7311

_ 3 -

can be. The system can be used for any units of measurement use. The following explains its use in terms of typographical units of measurement, and of Cicero units of 4.22 mm for the (horizontal) font and of points of 0.353 mm for the (vertical) font size.

In practicing the invention, an author can press the character keys of a 'usual. Typewriter-coded pulses that designate the character key pressed. These coded Input pulses are entered in a memory section, in which they are converted into binary numbers, the correspond to the different dimensions of the block letters. The binary number output of the memory part controls a dual counter. At the same time, a decadic counter works with the binary numbers, with the clock pulses are counted and with a number display device is connected, which indicates a count which the line length of a document is equivalent to. With the help of a presettable reducer, the clock pulses sent to the dual counter are made like this that the number of clock pulses counted by the decadic counter is a predetermined multiple is the number of pulses counted by the dual counter. The reduction ratio the clock pulse is set by the operator through a font selection switch set according to the selected font size. The 'counting process of both counters is limited to a number by the binary number output of the memory block, which corresponds to the font of each character represented by the encoded input data, the entered into the memory block from the typewriter keyboard. At the end of each programming period both meters are in operation at the same time

3098 17/07 1.2 BAD ORIG (NAi.

taken after the encoded data output by the typewriter has been scanned, which is done by Timing and gate switching takes place. The count of the decadic counter is therefore displayed, until a signal is received at the end of a print line due to the line feed of the typewriter that causes an automatic reset of the decade counter and the numeric display device.

The author introduces the font factor by means of a font selection switch, which the reception of the encoded data coming from the typewriter, the program selection in the memory block controls. If the data coming from the typewriter is encoded with the selected font are not compatible, a warning circuit will be switched on and the author will be notified accordingly gives away. With the help of a puncture switching arrangement the author can change the operating mode of the decadal counter and the

Modify the ordered components of the system. One can e.g. after pressing a wrong character on the typewriter perform a subtraction by which the numerical cone value is subtracted in the numerical display is done by pressing the backspace key on the typewriter and then pressing the wrongly pressed key again is pressed. On the typesetting produced by the typewriter, you can get a wrong character through Pressing the oblique line key cross out the oblique lines after pressing the backspace key operated while the system is on hold.

These and other tasks listed below and advantages are provided by the construction and

309817/071 2

BAD ORlQfNAL

τ 5 - ■ · "

Operational measures solved or achieved, the following will be described in more detail with reference to the accompanying drawings. In all drawings, the same reference numbers refer to the same parts. It shows - .

Fig, 1 a schematic view of the inventive apparatus ^y as an accessory to a conventional typewriter, ■ -

Fig. 2 in a block diagram of the invention System, ''

5 shows a simplified circuit diagram the memory part assigned to the system in more detail,

4 shows in more detail the part of the system used for font selection in a partial circuit diagram,

Fig. 5 in a Sehaltschema more precisely the warming part of the system,

6 in more detail in a partial circuit diagram the part of the system used to select the font size and "

7 in more detail in a partial circuit diagram the operating mode selection part of the system.

Fig. 1 now shows as an embodiment of the Invention an additional device 10 for a conventional electric typewriter 12. This has the usual components, including a keyboard H with character keys 16 and other common parts, such as a space bar, a Shift, a Return key, etc. As a result the author can use the typewriter in the usual

3098 17/0712

Way to label one side by drawing a sheet. Chuck paper in the typewriter and operate the character keys 16 and the other keys. During normal operation of the auxiliary device 10, pressing the character keys 16 and the other keys of the typewriter on the front panel of the auxiliary device 10 ^; visible numerical display device 18 a display of the corresponding cone value in Cicero units. The display device 18 is of a known type and can display four digits by illuminating seven glow strips. The numeric display device displays the total cone of the line written with the typewriter in Cicero units. If the line key is actuated at the end of the line, the numerical display device is automatically reset to lull, so that the total cone can be calculated again for the next print line.

To choose the font are under the display device 18 twelve push button switches 20 arranged in a row next to one another. By pressing a the switch 20 therefore introduces the font factor into the system. To introduce the desired font size into those to be carried out by the system For the calculation, one of twelve pushbutton switches 22 used to select the font size is actuated are arranged under the font selection switches 2Ö in a horizontal row. By pressing the font selection switch 20 the system is programmed for the various basic values of the cones of the pressure characters that Depending on the font chosen, the one with the typewriter correspond to 16 written letters by pressing the corresponding character keys. With each elected Font is the cone of each character approximately proportional to the font size. In the printing industry of

3098 17/07 12

In the United States of America, this value is between 6 and 14-4 points. In the illustrated embodiment the storage device arranged in the system is preprogrammed to basic values, which are in Cicero units of -6 points each correspond to the cones of the various characters in all fonts for which the System is applicable. If the font height is changed from one font size to another, which is caused by the is expressed on the number specified on the font size dials 22, the system multiplies the programmed Base value of the cone accordingly. Thus, the cone value is that of the display of the display device is added, depending on which character key 16 has been pressed and which the selector switch 20 and 22 have been pressed in view of the font and size desired. this will explained in more detail below.

. One of the function switches is the addition switch 2-4. The cone value added to the display of the display device when the addition switch 26 is actuated depends on which character key 16 has been pressed and which 'of the desired font and font height corresponding selector switches 20 and 22 operated ιιϊογτ who are. This is explained in more detail below.

The function switches also include a Subtraction switch. 28 which, when actuated, causes the system to occur when one of the keys is pressed the typewriter to decrease the count displayed by the display device. Furthermore is a Hold switch 30 is provided, after its actuation when pressing a key of the typewriter of the count displayed on the display device is maintained. By operating the switch 32 can

3098 17/07 12 SADOBJiSfNAL

the system can be turned off so that the typewriter can then be used in the normal manner can.

If the data entered into the system when one of the character keys 16 is pressed with the selected Font are incompatible, this is indicated to the author by a warning device, which turns off can be. The warning device can generate an optical and an acoustic warning display. the acoustic warning is switched off by actuating the switch 34, so that then only a visual Flashing display is generated. During an acoustic warning display, its volume can be adjusted by pressing one of the volume selection switches 36 »38 and 40 can be selected for the acoustic warning display. Daö according to the invention The system therefore gives the layout artist letter by letter, word by word and line by line Fonts in typographic units without the need for interpolation. Along with of the electric typewriter 10, the system enables a retrieval, a classification, a reset, a deletion, a subtraction and a visualization, so that the writer can strike a balance and choose between the different ones in question Words, font sizes and fonts.

According to ^£ ig. 2, the system has seven different pulse sources 42, 44, 46, 48, 50, 52 and 54. These pulse sources generate encoded pulses which

r ι

Represent input data when the character keys are pressed 16 and the shift key from the keyboard of the typewriter. You can use the buttons assign each desired pulse code to the typewriter. In the present: - ^ usfüLruugbeispiel the

309817/0712

BAD ORiQlNAL

coded output of an IBM Selectric typewriter used. When the space bar is ^pressed: this typewriter generates a pulse signal which corresponds to the pulse signal output of the pulse source 50. The gap pulse generator 56 is connected to the output of the pulse source 50 via the diode 58 and is. also connected to a time control ■ * ■ and control part 60 of the system. The data input part of the system further comprises a line stop signal generator 62 which is connected to the timing and control part by a manual switch 6'4. After the carriage return of the typewriter, the signal output of the line switching signal generator 62 causes the display device 18 to be reset. This will be explained below. «And thereby initiates a scanning process in which the memory block 68 is scanned by the timing and control part 60. -

The input data output from the pulse source when writing with the typewriter is processed in a pulse ^{processing part 70 (5 1} Ig. 2). For example, in * 'ig. 4, each pulse source has a pulse generator switch 72 which is connected to a voltage source via a voltage line 74 and generates a pulse which is output to one of the corresponding inverters 76 of the pulse processing section 70. The pulse signal is processed in an EO-G song which has a grounded capacitor 78 and a resistor 80 connected to the pulse signal line 80. The processed pulse is delivered to the memory block 68 in which it is sampled by a selected one of a plurality of memory units 82.

309817/0712 ...

- ίο -.

The above inverters 76 are commercially available components manufactured for example, from ^£ irma Motorola Corporation as MC74O4P.

According to - ⁰ Ig, 3, the memory block 68 in the illustrated embodiment has six of the aforementioned memory units 82, to which the pulse processing part 70 is connected so that input pulse data from the typewriter is output to seven of the 24 connections in each of the memory units via seven input lines 84, which correspond to the seven aforementioned pulse sources. The memory units are electrically programmable read-only memories, such as those produced, for example, by Intel Corporation in Mountain View (California, USA) as article 1601/1701 MOS LS1 ROM memory in the form of a monolithic micro-component with silicon gate. Each memory unit 82 represents a memory for 256 words of 6 bits each. Each memory unit is programmed for a different font and can receive coded pulses from the seven different pulse sources of the typewriter at terminals 1, 2, 3 and 18-21 receive. The input pulses are converted into a binary code that represents a fixed cone for each line and is calculated at output terminals 4-9, which are connected to a binary counter 86. First, in a programming period, the input data given by the typewriter are converted from the memory block into the aforementioned binary number output. The memory block then outputs a control signal in the form of binary numbers of 6 bits to the ual counter 86, so that the latter can only count the reduced counting pulses up to a certain count. Each memory unit 82 is programmed to store the data corresponding to the

3098 17/07 12

The selected font are converted, the unit is selected by a font selection circuit 92, which has the effect that a logical i ^ ins signal is issued or not issued via one of six signal rungs 95 to an enable circuit. The enable circuit is thus programmed so that the selected memory ignalleitungen six ^D coming from the data strobe signal applied eitsteuerungsschaltung ^ 'is. Furthermore, each memory unit can store two sets of information, one of which is selected depending on the presence or absence of a logical one signal at the Mr. 17 terminal. The terminal Kr. 17 is also fed by the font selection switch arrangement 92 via one of the six digital signal lines 94 (see FIG. 3). For this purpose, the font selection switches 20 are assigned to the font selection circuit .92. In accordance with the intended operation according to the invention, the terminals Kr. 12, 13, 15, 22 and 23 of each storage unit with a positive voltage source and the terminals Er. 16 and 24 connected to a negative potential source. Furthermore, a positive bias voltage is applied to the output terminals from the 'positive voltage line'. "Resistors 96 are applied. A bias voltage is also applied via a resistor 98 to an output line coming from the terminal ITr. 10 of each memory unit emitting an output signal if the input data scanned by the selected memory unit is programmed with the font for which the selected memory unit is programmed This incompatibility signal is applied to the timing control section 60 and an alarm display section 100 to which the push button switches 34, 36, 38 and 40 are assigned, as mentioned above with reference to Fig. 1. As a result, the operator receives a Display when she has pressed a character key with the selected one

309817/0712 BADORlGiNAt

Font is incompatible. Finally, terminal # 22 and # 23 of each storage unit are electrical to one another connected to enable the memory block to operate in accordance with the teachings of the invention.

As indicated above, the input data output by the typewriter is scanned by the memory block 68 during a programming period which is initiated by the fact that when one of the character keys is pressed a signal pulse is output to the defensive clutch switch 66, which is now grounded from the one in I ¹ Ig. 4 takes away the timing part shown. As a result, by means of an according to i'ig. 2 included in the timing control part 102 timing circuits initiated a sampling period. The timing circuit 102 delays the beginning of a sampling period until all pulse sources have reached the correct level, and then outputs a pulse signal to an HMD gate 104 which outputs a signal processed by the inverter 106 to the initial timing circuit 108. This is a öpeicherfreigabesignal about ^ö ignalleitung 110 to the memory enable gate circuit 88 from then, the ignalleitung now in the aforementioned manner on the ^ a data strobe signal to the memory block outputs. The output provided by the timing control circuit 10Θ via the line 112 enables the dual counter 86 to receive Date, n from the memory block via the data signal line 146. The dual number data received from the dual counter is stored until a timing circuit 114 initiates a counting sequence. The output of the time control circuit 108 is also sent via the line 112 to the time control circuit 114, from which a price signal is sent to a terminal of the IJAED gate 116, which now generates a count start signal via the signal line 115 and a signal shown in FIG

309817/0712

BATH ORIGINAL

. : _ 13 -; ■ · ■ ^; _v

1 ■

G-att part 120 shown, so that this makes a decadic counter 122 ready for operation simultaneously with the ^ ualzahler 86. This is explained below. However, if the memory block via the & ig _na i_ line 124 ness-ssignal write to the Warnanzeige'teil 100. incompatibility, the timing circuit 126 is triggered, the now delivers a blocking signal to the NAND gate 116 via line 128 so that the output of a start of counting signal via the line 118 to the gate part 120 is prevented. In this case, the display device 18 therefore does not produce any display. The timing control section 60 also automatically resets the decade counter 122 in the manner indicated above by applying a reset signal to the counter 122 from the NAND gate 1, 32 via the reset signal line 150. As a result, an enable is sent to a terminal of the NAND gate 132 from a timing control circuit 134, which is triggered by a positive signal pulse coming from the line switch 62 Trigger I36 via the NAND gate 132, so that the timing circuit 136 emits the reset signal for resetting the decade counter via the "line 130. If an uninterrupted counting without prejudice to the line switching of the typewriter is desired, a manual switch 64 can be operated, whereby the generation The timing control section 60 also has a timing control circuit 138 via which the gap signal output by the gap control switch 56 gates the NAND gate 104, thereby initiating the programming period in which the input data output by the typewriter is output be touched. The timing circuits 102, 108, 114 * 126, 134, 136 and

309817/0712

can be monostable multivibrators »like them from of Motorola Corporation under the name MC74121P can be manufactured. The NAND gates can be from the type of component manufactured by Motorola Corporation under the designation MC74OOP.

According to long. 4 includes the text, dialing circuit 92 the above-mentioned Sehriftart Wahlhalter, 20, the are interconnected in pairs 20 'and 20 ". Each of these pairs consists of two single pole changeover switches which are coupled to one another so that they have one Supply voltage when one of the switches 20 is actuated to the switch lighting lamp assigned to the switch 140 create. When actuated, each switch connects a positive voltage source to one of the input cycles a NAND gate 142 of the memory enable gate circuit 88, so that at the beginning of each programming period an enable signal is applied to the terminal Kr. I4 of a selected memory unit when in a data sampling signal via one of the signal lines 110 from the timing control part 60 in the aforementioned manner one of the NAND gates 142 is asserted. After that, the data can be sampled and processed in the chosen one Storage unit 82 take place in accordance with an information set stored in this, which is determined by the presence or absence of a positive voltage of terminal no. 17 of the selected storage unit. With this terminal no. 17 is shown in fig. 3 the signal line 94 connected. When the font selector switch is 20. ' of a pair is actuated, the diode 144 blocks that Applying a positive voltage to the logic signal line 94, whereby one of the two stored in the memory unit Information sets is chosen. When the other switch 20 ″ of each pair is actuated, the voltage becomes positive via the signal line 94 directly to the terminal

309817/0712

Kr. 17 and via the diode 144 to the NAND gate 142 released, whereby at the time of the release of the memory unit the other information set is selected. In the illustrated embodiment, -all are odd-numbered Selector switch 20 and the even-numbered selector switch following it combined into a pair, as shown in ^ ig. / 4, so that one of the six Storage units 82 and one of the information sets stored therein are selected and thereby during each by pressing a character key 16 on the typewriter programming period initiated by the Typewriter input data scanned · As a result, the memory block will be freed by the font corresponding to the desired font Storage unit programmed.

At the end of the programming period, the Memory block 68 has a binary number output in the aforementioned manner, which is output via the six bit output lines 146 to the binary counter 86 and this controls. This dual number control signal indicates the count up to which the dual counter 86 can count after it in the aforementioned manner by that from the timing control part 60 via the gatetex part 120 and the line 118 output start of counting signal put into operation has been. The pulses are transmitted via the input pulse line 148 (£ 'ig. 2) applied to the dual counter. if the dual counter has counted as many pulses as it corresponds to the binary control signal that was sent during the programming period of the memory block has been applied to the counter 86, a working cycle is ended and returns the dual counter 86 outputs a stop signal via the stop signal line 150 to the gate part 120. The dual counter can be a 4-bit synehron counter ·. his. like him from the company Texas Instruments manufactured under the designation 3Β74193ϊί will. . ; ·

3098 17/0712

As indicated above with reference to FIGS. 2 and 3, the memory block 68 can apply a signal to the warning display device 100 via the incompatibility signal line 124 so that it generates a warning display for the operator Signal emitted via line 124 from a timing circuit 152 which, in the illustrated embodiment, triggers a monostable multivibrator 154, such as that manufactured by Motorola Corporation under the designation MC74121, and which determines the duration of the warning display. The output of the multivibrator 154 is applied via a coupling resistor 156 to the base of the transistor 158 in a signal display circuit 160 to which the selector circuit 162 is assigned, to which the push-button switches 34, 36, 38 and 40 mentioned with reference to FIG. 1 belong . Each of these switches is connected to a positive voltage source by a voltage line 164, so that when the switch is actuated an associated switch lighting 162 lights up. When the switch 34 is actuated, its lighting circuit is closed via the transistor 1 $ 8 when this has been switched to its conductive state by an output dfes * Multivtbrator 154. Therefore, when the off switch 34 is actuated, an I ¹ ncompatibility signal emitted via the signal line 124 causes the lamp assigned to the button 34 to emit an optical flashing signal, while when the switch 34 is actuated no acoustic warning signal can be emitted. If the lamp circuit assigned to the switch-off button 34 is open, the output from the collector of the transistor 158 aii is applied to an acoustic warning device 168, which is connected in series with one of three parallel-connected resistors 17C, which each have one of the oc '.- age 36, 38 and 40 are connected to the positive voltage line 164, the value of the »fid he stands 170 · is determined

309817/0712
BADORtQINAL

hence the -'Hisgangspegel of the acoustic warning device 168, so that it emits a signal and at the same time an associated switch lighting lamp emits a flashing signal outputs when transistor 158 through d.en output of the multivibrator 154 ′ into a conductive state is switched. As a result, the operator can an optical and / or acoustic warning display and the volume of the acoustic warning display Select. ■

The reducer 210 is a pulse frequency sub-meter which emits pulses via a generator part 172 and a pulse line 148 to the flow counter 86 at a frequency that is in a selected ratio to the I frequency of the pulses generated by a clock generator 174 can be applied directly to the reading part 176 via the operating mode selection part 178 of the gate part. The 3-gate part 172 also has a double flip-flop 180, as it is manufactured by the i'itma Motorola Corporation under the designation-MC 7476P. The 2! -Eits control part 60 outputs a Zühlbeginn signal pulse via the signal line 118 to a Vorsetzklemme 182 of the part's flipflops 180A of the one level is applied from the double flip-flop, so dai3 ^l to terminal 154th This enables the HAKD gate 186, so that the jj-lip-flop 160B of the double flip-flop is preset when the next reduced clock pulse is received and therefore via the
Xlemiiie 196 the !! AND gate 190, is enabled and '' emits reduced x'aktimpulse over the line 148 to the binary counter. The scaled down clock pulse is
at the same time output from the ivAilD gate 198 via .the part to the decadic counter 122. The pulse emitted via the signal line 148 to the dual counter is also received at the terminal 194 of the plip-flop 180.Λ, so that this is reset and via the

309 817/0712 BATH

Terminal 184 the NAND gate 186 is blocked. As a result of this arrangement, the two counters 86 and 122 ready for operation at the same time for counting received pulses and both counters stop counting, the dual counter 86 via the stop signal line 150 outputs a counting end signal to terminal 202. The gate 200 causes a negation of the Tekt signal and keeps the circuit at the correct logic level for the delivery of the clock signal to the KAND gates 204 and 206, which are connected to the addition and subtraction terminals of the decadic counter 122, By means of the function switching arrangement 26 ', one or the other is used to control the operating mode of the reading part 176 the gates 204 and 206 are enabled for the forwarding of the clock signal.

The clock signal is sent directly to the reading part via the gate part at a predetermined frequency submitted. Furthermore, the clock signal is made adjustable by means of a matrix arrangement 208 and the aforementioned Coaster 21.0 in a ratio that is set by the operator by actuating the Sclirift ^ wheel selector switch 22 can be selected. These parts are indicated schematically in FIG. The number of from the pulse paid to the reading part is therefore a selected one Multiples of that in the same period of time from the dual payer 86 counted pulses. As the number of coming after each period for typing the vop of the typewriter Data counted by the dual counter 86 represents a shift cone for a selected font should, becomes .this “vert through corresponding reduction the luktimpulüG changed according to the font size. In the depicted. Execution example corresponds to of the number of pulses counted by the line part is the product of the number of pulses counted by the dual counter and that by

309817/0712
BAD ORfGINAL

6 / 1G- divided font size in points, G-emäß ^ 'ig. 6th Each font size selection holder 22 has two individual switches coupled to one another, which are connected to a positive voltage line 21-2 are connected. One of the single switches closes a supply circuit for the lamp 214, which is used to illuminate the actuated switch. The other switch connects the positive voltage line with one of six terminals, each of two connected in series Diode matrix parts 216 are assigned. These matrix parts are of the type of the Harris Semiconductor Division of Harris-Intertype Corporation under the designation HM1-0186 Component .. With the help of the twelve font size selection switches 22 the operator can therefore assign twelve binary numbers to the matrix parts accordingly Introduce eight bits each into the scaler assembly 210. The output of the die part is parallel to two circuit parts 218 and 220 of the coaster arrangement 210 connected. These sections are 4-bit synchronous counters such as those made by the Texas company Instrument Company under the designation SF74193. The parts of the posture can vary depending on the Dual numbers applied to them divide any number between 1 and. The clock pulses applied to the coaster and with them the frequency of the applied to the dual counter Pulses are therefore scaled down in a preset ratio. If the dual counter differs from the presettable coasters over the gate part in the has received a certain number of impulses as mentioned above, correspondingly from the Speieherblück prescribed program, an xialt pulse is applied to the flip-flop of the gate part via line 150, whereby the operation of the reading part is interrupted until by pressing the next character key on the typewriter a further data entry is initiated, v

3 0 9 8 17/0 71 2. :

BAD ÖRKSINÄt;

During normal operation of the system, the addition switch 24 is operated in the aforementioned manner, so that the power supply line 222 coming from the system power source 224 to the switch illumination lamp 226, which is assigned to the addition switch 24. (Fig. 7) · As a result, the circuit is this lamp is closed and the addition switch is actuated illuminated. At the same time, the addition switch connects the voltage line via the gate part 120 with the addition kleiimie 242 "of the first decadic Zr.hlers 240. The decadic counter part 122 consists from five consecutively connected 4-bit syn- ' chronzshlern 240, of which the last four counters provide a total count via decoding drivers 228 deliver the corresponding stages of a reading visual display device 18 with 7 strips each. The deciding Drivers are of the type made by Radio Corporation of America under the designation ECA. 2502E manufactured component. The decadic counter also has a subtraction terminal 230 * to which the Clock pulses are applied when the subtraction switch 28 has been operated, so that the voltage. line 222 via the gate part 120 with the subtraction terminal 230 connected and the circuit of the subtraction switch associated lamp 232, closed is. When the hold switch 30 is actuated, it lights up associated lamp 234 and no voltage is applied to the gate part that allows it to forward clock pulses enabled on the decadic counter. The addition age 24, the subtraction switch 28 and the hold switch 30 are therefore used to select the operating mode of the Systems. By pressing the switch 32 is the current source 224 separated from the leads 236 and 238, so that the syntem. turned off the puncture the typewriter is not affected.

3098 17/0712

BAD OFHQiNAt,, ', M

From the foregoing description it is apparent that system of the invention replaced by the simple operation of the selection switch shown in ^r ig 1 ... 20 and 22, the selection of a font and a font degree "made possible. An acoustic and / or optical warning signal device is provided which indicates the use of a character which is incompatible with the selected font. Furthermore, in the event of typing errors, the display can be corrected, - if you operate the switch 28 and then the wrongly pressed 'character key presses again, so that the corresponding to the wrong character. Font is subtracted. The operator can also use switch 30 to put the system on hold before writing a character, such as a slash over a wrong character, whereupon the system is returned to normal operation. The system can be prepared for a new font by exchanging the modular storage units.

Above, the idea of the invention was based on an -iUisführungsbeispiels explained by the person skilled in the art can be modified in various ways, so that the invention is based on the embodiment shown and described and is not restricted in its mode of operation.

3 0 9 8 17/0712 BATH

Claims (7)

Patent claims: M Λ Additional device for a typewriter with a keyboard and a device which serves to input pulses when keys are pressed on the keyboard which represent characters corresponding to the keys pressed on the keyboard, indicated by a computing device with two counters, a storage device associated with the input pulse generating device is connected and is used to input impulses into corresponding To convert control signals for programming one of the counters, a clock pulse source, one with the other Output display device connected to the counter for displaying the total number of clock pulses, one with the Counters connected gate device for uniform delivery of the clock pulses to the counter with three different Pulse frequencies, a selection device connected to the gate device for changing the pulse frequency of the pulses delivered to one of the counters, one between the input pulse generating means and the gate device switched on time control device for making the simultaneously ready for operation Counter after programming the. One counter by the memory device and a count limiting device, which interrupts the delivery of clock pulses to the one counter after the program has been carried out. 2. Zusatzger.lt according to claim 1, characterized in that that the storage device has a plurality of storage units connected to one another, from each of which has input terminals that are connected to the input pulse generation device icht connected aind, and Binärauagan ^ skleminen, which are connected to one of the counters, as well as one connected to the memory device 309817/0712
BAD ORIGfNAL Font selection device for selecting one of the storage units for receiving the input pulses, where each memory unit stores at least one program that contains the basic values of the fonts of the characters a "specific font. 3. Additional device according to claim 2, characterized in that that with the memory device an incompatibility warning device which generates a warning display based on input pulses for ■ which programs the selected one memory unit is, the warning device responds if a Key is pressed that corresponds to a character that does not exist in the selected font. 4. Additional device according to claim 3, characterized by a reset device, which the time, control device with the other. the counter connects and resets it to IJull due to the line feed of the typewriter. 5. Additional device according to claim 4, characterized in that that the selection device comprises a scaling device, which is used to correspondingly the clock pulses emitted to said one counter to reduce the font size in a selected ratio. 6. -additional device according to claim 5, characterized in that that the count of the stocky tav ^ - impulse is limited by the control signals to a number that corresponds to the fonts for a selected font corresponds to the characters corresponding to the keys on the keyboard. 309817/0712 BATH 7. Zusatzgeri.it according to claim 1, characterized in that the selection device is a reduction device includes, which is used to output to the said a counter clock pulses accordingly to reduce the font size in a selected ratio. 8. Additional device according to claim 7 »characterized in that the counting of the reduced clock pulses is limited by the control signals to a number that corresponds to the font for a selected font corresponds to the characters that correspond to the tests on the keyboard. 9 additional device according to claim 8, characterized in that that the storage device has a plurality of storage units connected to one another, from each of which has input terminals that are connected to the input pulse generating means connected, and binary output terminals, which are connected to one of the counters, so '/ ie one connected to the memory device Font selection device for selecting one of the storage units for receiving the input pulses, each memory unit storing at least one program, that the core values' of the characters one font specific font. 10. Accessory device for a typewriter with a keyboard and a device for generating several coded input pulses which represent the characters assigned to the keys on the keyboard by a computing device with two counters, a storage device connected to the input pulse generating device is connected and is used to convert the lüe into corresponding control signals for pro- 309817/0712 BATH ORIGINAL. programming to convert one of the counters during a sampling period, a clock pulse source, a, with output display device connected to the other meter to display the total number, the clock pulses, a gate device connected to the counters for the simultaneous delivery of the Tektimpulse to the counters a preselected frequency that corresponds to the font size, a timing device that the Counter after programming one counter makes the memory device ready for operation at the same time, and a count limiting device, which after carried out programming outputs the control signals from the memory device to one of the counters and so that the counting of the clock pulses is limited to a number, which corresponds to the basic values of the font of the characters of a selected font. 11. Control device for controlling the operation of a dual counter as a function of several Input pulse sources for delivering predetermined Pulse signals that correspond to different input values, characterized by several interconnected These storage units, each of which has input terminals, each connected to one of the input pulse sources as well as output terminals connected to the dual counter are connected and are used to control the operation of the same, through a with the storage units associated timing device for sampling the pulse signals during a predetermined programming period, a facility that during the programming period makes one of the memory units operational, so that it converts the sampled pulse signals into binary bit signals converts that appear at the output terminals to a leak pulse source for reference signal * a gate connected to the timing device 309817/0712 BAD ORIGINAL ¹ device for sending the reference signals to the dual counter due to the end of the programming period, and means which connect the output terminals of the storage units to the dual counter so that this generates an output signal when it has received the reference signals in a number determined by the Binary bit signals is determined by a selected puncture correspond to the input values. 12. Control device according to claim 11, characterized in that a second counter is connected to the gate device, which simultaneously with dem- dual number he draws & signals with a higher pulse frequency counts. 13. Control device according to claim 12, characterized by a pulse frequency control device connected to the gate device and the clock pulse source and pulse frequency control means connected to the clock pulse source to choose the ratio between the Irupul's frequencies of the dual counter or the second Counter received reference signals. 14. Control device according to claim 13, characterized by a selection device which is connected to the device for making one of the storage units ready for operation and which selects a storage unit and the information stored therein. ^: . 1 ¹ ;. Control device according to claim 14, characterized in that each of the memory units is an electrically programmable pect memory. 16. Control device according to Anapruch 15t ^ a- characterized in that each of the storage units has one 309817/0712 other terminal., which due to the receipt of a of the pulse signals, - for which the selected memory unit is programmed, emits a warning signal and thereby displays an input value for the selected memory unit does not exist. 1.7. Control device according to Claim 11, characterized by a / counting device which is associated with the device to make one of the storage units operational is connected and this is a storage unit and selects the information stored therein. 18. Control device according to claim 17, characterized in that each of the storage units is an electrically programmable read-only memory. 19. Control device according to claim 18, characterized in that each of the storage units has another terminal which, due to the receipt of one of the pulse signals, for which the selected memory unit is programmed, emits a warning signal and displays an input value for the selected memory unit does not exist. 20. Control device according to claim 11, characterized in that each of the storage units is a is electrically programmable read-only memory. " 21. Control device according to claim 20, characterized in that each of the storage units has another terminal that is due to the reception one of the pulse signals for which the selected memory ^ unit is programmed, emits a warning signal and thereby shows an input value for the selected ■ memory unit is not available, 30 98 17/07 12