DE2627698A1 - Electronic typewriter with keys for symbol set selection - has dot matrix printing head and symbol group store accessed by key operation - Google Patents

Abstract

Electronic typewriter has dot-matrix printing head and a keyboard by means of which different groups of symbols can be selected, for example mathematical symbols, musical notation and different language alphabets. The particular symbol is visible one or above each key. A symbol group store is associated with the keyboard. The keyboard has additional keys whose operation enables the symbols from a group to be printed in different sizes. A further key enables the particular symbols to be printed at an inclined angle. A working store holds the symbol group which has been selected and is visible on the keyboard.

Description

Freinut Eärz Jehanger Grami

Weidenweg 7 ergenthalerstr. 38 / in 8044 Lohhof 8 Munich 60 "Electronic Typewriter The invention relates to a typewriter - according to the generic term of the preceding claim 1.

Such a typewriter is known (DS-OS 2251831) in which however, the characters on the keyboard are fixed and cannot be changed.

Typewriters are already known that have two different keyboards and thus allow two different alphabets or scripts in one Process text.

Since these machines work mechanically, they are on type lever keyboards bound and thus fixed in the alphabet.

(DT-oS 2319258).

The invention is based on aie the object of a typewriter to train initially mentioned type so that it is possible with her, by actuation different alphabets and possibly further groups of symbols by shift keys, such as 3.

math symbols or note symbols for musical scores write on the same keyboard.

This object is achieved according to the invention in that at a Typewriter of the type mentioned at the beginning optionally different on the keyboard Groups of symbols are switchable, on or above each key the assigned symbol the symbol group switched to the keyboard and the keyboard a symbol group memory is allocated in which a plurality of symbol groups can be saved with the assignment of their individual symbols to certain keys.

This has the advantage that by using a switchable keyboard- the same typewriter just by pressing a button different alphabets resp.

Fonts or other groups of symbols can be switched.

As an example, write a text with mathematical expressions listed, which so far has necessarily been an above-mentioned double keyboard typewriter or even one with three keyboards, if you're within the scope of math Characters also used Greek letters. Invention according to the Invention of the typewriter by pressing a single button on another group of symbols toggled with the associated symbol arrangement.

According to an advantageous development of the invention, the writing head a plurality of distributed headers, with which by corresponding Control of the writing head uninterrupted lines and curves on the writing medium are printable.

Another benefit is seen in the fact that the keyboard has additional keys has, cei whose actuation the symbols assigned to the keys in half double or multiple sizes are printable. This facility serves e.g. for identification of text passages or the clear presentation of mathematical functions.

An additional button is also used to identify text passages the keyboard, when activated, individual symbols move at a predetermined angle are printable at an incline.

Another advantage is seen in the fact that the keyboard is freely programmable Keys are available to write any characters in their associated memory that are retained when the keyboard is switched. So it is easily possible various characters that are written into this memory, e.g. from foreign symbol groups to be able to retrieve them immediately.

The invention is based on the drawing in the form of an exemplary embodiment explained in more detail.

The drawing shows: FIG. 1 a diagram of the arrangement of the individual Assemblies Fig. 2 the keyboard of the typewriter Fig. 3 the function of the additional key The arrangement of the needles in the writing head in FIG. 5 is used to incline the symbols in FIG Scheme for the cell structure of a freely programmable memory.

1 shows an organization unit 1, which has a symbol group memory 2, which stores the symbol groups 3, and a working memory 4 is assigned. A part of the main memory 4 is provided as a freely programmable memory 5. A keyboard 6 is used for individual, im. Working memory 4 saved symbols to a display buffer lo and thus for readable representation in to bring a display 11. A printer buffer 9 takes over the im Display buffer lo cached symbols and passes them to the printer for printing 7 continues with its 8 print head. The symbol group memory 2 is through a suitably programmed data carrier via a magnetic tape reader 12 with groups of symbols 3 occupied. For reading a single symbol into the freely programmable memory 5, a single character reader 13 is used.

In Fig. 2, the entire keyboard 6 of the typewriter is shown. In the middle of the keyboard 6 are similar to the known typewriters Keys 14 for the symbols of the symbol group switched to the keyboard 6 3.

For example, the German Alphabet in the usual arrangement of letters for German typewriters The symbol switched to a key 14 is either directly on the key 14 or in a display field arranged above the key 14 15 legibly displayed. The corresponding display is immediately with the circuit for the keyboard 6 coupled. For those stored in the symbol group memory 2 There are symbol groups 3 toggle keys 16 with direct assignment to the corresponding ones Memory parts. By pressing one of these buttons the content of the corresponding stored symbol group 3 called up and stored in the main memory 4. This turns the entire Character display on the keys 14 or in the display fields 15, which for each character from an LED matrix or consists of a similar display element, on the symbols of the new symbol group 3 µm; d. H. the machine can e.g. B.

by pressing one of the shift keys 16 the German Alphabet, writing the Greek alphabet or math symbols. For two or a plurality of groups of symbols 3 is a corresponding number of shift keys 16 with indicator light available. A characteristic appears on each shift key 16 Symbol that shows the symbol group 3 assigned to this key.

z. E.g .: D - German OG - Greek # - Notes E - English # - Mathematics By pressing the shift key 16 (D) z. B. changes the entire keyboard 6 to the German alphabet with the same type space allocation as to the familiar German typewriters. For English, the corresponding English alphabet applies etc., or when you press (#), the mathematical ones appear on the keyboard 6 Sign.

The saved symbol groups 3 of the machine can, except for one odex several, which may be wired zest, replaced by other symbol groups 3 earth; z. B. you can read in a possibly saved Russian script of musical notes in the symbol group memory 2. This changes the Associated shift key 16 from the Russian script symbol (£ to If if you want to replace the musical notes with the Arabic script, you can do this with Read in an appropriately programmed data carrier as above, and this also changes the display of the relevant toggle key 16 to (#) as Changed Arabic language symbol.

Pressing the toggle key 16 (#) changes with the display on the keyboard 6 also the writing direction to 'from right to left'.

As a data carrier you can z. B. magnetic tapes, magnetic cards, punched tapes, use transparencies or similar that have been printed or written on. Also need appropriate Readers are available. There is a key (SPM) by pressing it the typewriter to memory mode or back to normal mode can be switched.

The intended memory functions can be carried out in this way.

By repeatedly pressing the key (SP7; i) the machine switches back to normal mode.

This typewriter can easily be connected to a small computer and can use text as well as curves or other drawings as its output device print out, with the writing speed of the machine used here as a plotter compared to conventional plotters is significantly increased.

There is also a button (FLOTTER) 1 by pressing the button can be connected directly to the output of the computer. This output information can ". B. Drawings or exte.

By pressing the (SPDE) key, the entire content of the working memory is saved 4 including the freely programmable memory 5 is printed out.

There are also buttons (I) (II) (III) for setting the print type size. They can be used to print characters over one or more lines, as required. This facility allows characters for indexing, boundaries of an integral character or summation sign and different sized pairs of brackets etc.

Certain simple characters such as B (:;) that appears on a key and which are always displayed regardless of the switch from lower case to upper case can be displayed twice, depending on whether (:) or (;) is current the corresponding character on the key is illuminated more clearly.

Lower case upper case To get an overview of the still free To facilitate writing space on a sheet of paper is a device for counting the lines intended. When a new sheet of paper is clamped, the set line spacing becomes. as a result, the number of lines per page in a special field 17 of the display 11 displayed. With each line feed, the displayed number decreases by one, so that you are informed about the number of free lines at any time.

Since this machine has to print very precise characters and / or curves, becomes as printer 7 a caliper printer or printer according to the ink jet method or similar used. However, according to FIG. 4, the needles do not have to be as in known ones Printers should be arranged vertically in a line or as a matrix, but preferably diagonally or in two to three rows offset vertically next to each other, aamit z. B. when printing an oblique line or a curved line, no sacks develop. Another solution is a conventional dot matrix printer. These requires a mobility of the print head 8 by a quarter point spacing in the directions right-left and up-down.

The display 11 fed by the display buffer 10 shows the content one or more typed lines. To make writing and proofreading easier, there is a work area. This field is designed so that there is both a Symbol and is also identifiable as a work area. This is z. B. achieved so that on the display buffer 10, the work field at the same time with one written symbol is displayed, whereby the work field consists of all existing Luminous dots of a symbol field is formed and the written symbol thereby it can be read that those points which represent the symbol do not light up.

There is also a printer buffer 9, which is used by this display buffer 10 picks up the corrected and approved lines for printing and sends them to the print head 8 to Printing passes. The correction is done by deleting ds erroneous character in display buffer 10 and subsequent rubbing.

Example of a correction: In a shrill forest ...

The working field must go to the correction point using the (#) (#) (#) (#) keys be brought until the following picture appears on the display 11: In a schörm Forest...

By pressing a key (ONE), the one located in the work area and the subordinate symbols moved one position further, creating the following picture appears: In a beautiful # m forest ...

Then the key (e) is pressed so that the following picture appears: In a beautiful forest ...

By pressing a notch (DELETE), the one in the work area is deleted Icon deleted so that the following picture appears: In a beautiful forest.

Then the key (s) is pressed and the correction is completed.

As with known typewriters, there is also a tabulator here. Since one or more lines are displayed in the display 11 before printing, this has the advantage that only the work field jumps to the next tab position, and so this tab stops switching silently.

The display 11 constantly shows the content of the display buffer 10, the is broken down into a number of character matrices. Each character has a tab bit which is assigned "1" if the (TAB +) key is pressed at this point has been, otherwise with '20 "A tabulator bit can be opened by pressing the key Set (TAB-) back to "0" in the correct place. The effect is the same as with the known typewriters in which tab keys are available.

The (TAB) key causes the working field to move to the next position, at which the tab bit is equal to "1", or otherwise to the end of the line jumps. If the typewriter is connected to a computer, the tabulator function can also be controlled directly by the computer, so that the output information can be tabulated can be printed out without having to spend a lot of time on the software of the computer needed.

There are also a number of freely programmable keys (F1) (F2) ... (Fn). A freely programmable key has the programmed meaning which is displayed simultaneously on the key; with multiple symbols, the are programmed on a key, the 1st symbol is displayed. By pressing this programmed key is the associated memory content 19 in the display buffer 10 copied and printed later. If z. m. the key (F1) above programmed to (è) the following keys are pressed one after the other: (SPM) (UP) (F1) (e) (#) (#) (SPM) If e.g. B. press the (F2) key on the place (and) programmed horses, the following keys are pressed one after the other: (SPM) (F2) (u) (n) (d) (SPM).

If z. B. the (F2) key on top of the text (best regards) is to be programmed, the following keys are pressed one after the other: (SPM) ( UP) (F2) (UP) (X) (i) (t) () (f). .. (e) (n) (SPM) Another possibility of Free programming offers the reading of data on suitable data carriers, e.g. Transparencies self-made symbols. Should z. B. programmed the key (243 to the symbol (#) the following keys are pressed one after the other: (SPM) (F4) and after the Insertion of the data carrier in the single character reader 13 the keys; (READ) (SPM).

Now the key (? 4) is programmed and by pressing it aste (? 4) the symbol () is copied to the display buffer 10 and printed.

It can be easily realized that the machine is in memory mode displays the memory content 19 of the respective memory location to be programmed, and this makes it possible to program the individual bits of a character directly, by z. B. an illuminated point is moved by certain keys on the display 11 and one bit from the affected memory location is set to "1" and thereby the Symbol is programmed directly in the memory. To move the point you can use the Use the same keys as to move the work area (#) (#) (#) (#).

Only one additional button is required to determine whether the bit just described should be set to "1" in memory or not.

A symbol group is transferred from the magnetic tape reader 12 to the symbol group memory 2 3 z. B. German read. The content is linearly in the symbol group memory 2, which later viewed from the keyboard 6 as segmented content will. The characteristic symbol of the symbol group in this example (D) becomes after reading in on the shift key 16 previously printed. At the end of The direction bit is set on the data carrier, which indicates the direction in which it is going Symbol group 3 is to be written on the display 11.

If any key 14 in the middle of the keyboard 6 is pressed, the assigned symbol is searched for in the main memory 4 and then clicked on the display buffer 10 is copied and displayed in the display 11. The direction bit becomes queried and the working field in the display 11 depending on whether the direction bit "1" or "0" is indexed to the right or left.

The display buffer 10 operates with OR logic, i. H. you can z. B. after pressing the key (4 write several symbols on or within one another.

A number of memory locations 5, each holding a symbol is assigned to the freely programmable keys (F1) (22) (Fn). (please refer Fig. 2) Your organization looks like this: The memory locations 5 are linear numbered, e.g. B. 1 to 99, detailed S01 to S99. A Icon to be saved. There are z. B. 10 freely programmable keys (Fl) ... (Flo) available, which can be programmed both above and below.

There are the following identification bits for each memory content according to FIG. 5: a) Content bit 17: Bit = 0 if the memory space is free Bit = 1 if the memory space is available is occupied b) Pole memory bits 18: This group of bits contains the address of the following associated storage.

The key (? 1) is programmed with (and). These three letters are written in memory locations S02 S07 S08.

The content bit 17 of S02 S07 S08 is set to "1" since these memory locations are occupied. The start address is in the register of (F1) of the 1st letter of the text "02" is saved. The sequential memory bits 18 of S02 are assigned "07" and those of So7 are assigned "08". The following memory bits 18 of S08 are occupied by 200 ", as no further letter follows. By pressing The following processes take place with the key (21): From the register of (? the address of the 1st letter called and the associated memory content 19 on the display buffer 10 copied. If the following memory bits 18 of this memory location are "00", then it is the process is ended, otherwise the memory content 19 of the following memory location will be copied into the display buffer 10 and made the same query for this space, etc., until the last letter has been copied. This last letter has as a pole memory bit 18 "00"; the entire text (and) from (91) is thus brought to the display buffer 10. If you now want to program the key (F3) with the text (1.1.76) are some memory locations already occupied, e.g. S02 S07 and S08: By Pressing the buttons (SPi and (23)) the address of the first free memory location becomes (here S01) brought into the register of (23). Now press the buttons (d) (e) (n) () (1) (.) etc. each of the following processes are carried out: The Letter (d) is copied into 301.

The content bit 17 of S01 is set to "1".

The next free space is searched for: a) is none If there is more free memory available, the display 11 flashes to indicate that there is not enough memory b) if a memory location is free (here SO3, its address is "03" as the next memory bit 18 written in S01.

The letter (e) is copied to 503 by pressing key (e) etc. The key () also has a specific code that, like all other symbols, has a Memory occupied. When the last symbol is saved, press the key (SPM) is written into the next memory bit of the last memory location "00". The storage process is now complete and the machine is back in normal mode.

Claims (12)

P a t e n t a n s p r ü c h e 1. Typewriter with a writing head (8), to which a keyboard (6) is assigned, by means of which the writing head (8) is used for writing of symbols composed of dots and assigned to the respective keys (14), is controllable, and with a display buffer (103 for storing at least one Line of symbols, which an electro-optical display device (11) for readable Representation of the typed lines is assigned, and with a keystroke excitable control device for printing the stored lines on the writing medium, characterized in that there are different groups on the keyboard (6) are switchable by symbols, the associated symbol on or above each key (14) the symbol group (3) switched to the keyboard (6) can be read and the Keyboard (6) is assigned a symbol group memory (2) in which a plurality of symbol groups (3) with the assignment of their individual symbols to certain keys (14) can be saved. 2. Typewriter according to claim 1, characterized in that the Write head (8) several point writing devices arranged in a distributed manner has, with which uninterrupted by appropriate control of the write head (8) Inside and curves can be printed on the writing medium. 3. Typewriter according to claim 1 or claim 2, characterized in that that the keyboard (6) has additional keys ((I) (11) (III)) when pressed the symbols assigned to the keys (14) in half, double or multiple sizes are printable. 4. Typewriter according to claim 1 to claim 3, characterized in that that the keyboard (6) has an additional key ((SCHRAG)), when pressed the symbols assigned to the keys (14) are inclined by a predeterminable angle are aruc5bar. 5. Typewriter according to claim 1 to claim 4, characterized in that that the symbol group memory (2) has a working memory (4) for storing each desired and on the keyboard (6) readable symbol reason (3) is assigned. 6. Typewriter according to Anspruc h 5, characterized in that the Keyboard () keys (16) for copying one of the different stored ones Has symbol groups (3) from the symbol group memory (2) into the main memory (4). 7. Typewriter according to claim 1 to claim 6, characterized in that that the keyboard (6) has a key ((SM)) through which the typewriter in the storage mode can be switched. 8. Typewriter according to claim 7, characterized in that it freely programmable memory (5) has in the key ((SPM)) and this Save assigned additional keys special, freely selectable symbols can be saved are it 9. typewriter according to claim 7 or 8, characterized in that the Key ((SPM)) is assigned a key ((LES »), whereby when both keys are pressed in the @ symbol group memory (2) or in the freely programmable memory (5) Symbol groups (3) or symbols from data carriers can be stored. 10. Typewriter according to claim 1 to claim 9, characterized in that that the display buffer (10) in addition to displaying over several lines Symbols is formed. 11. Typewriter according to claim 1 to claim 10, characterized in that that the typewriter has a device for counting lines at any time shows legibly the number of free lines on a sheet to be written on. 12. Typewriter according to claim 1 to claim 11, characterized in that that by pressing the ((PLOTTER)) key, the stylus can be used as an input / output device with a Computer to connect.