Miniaturized typewriter

Claim 2

Miniaturized typewriter, characterized by a rectangular structure with the longer edge horizontal equipped with miniaturized keys arranged as in the traditional keyboard and with one or more lines of display on top (perhaps of the liquid crystal type), with an anticipated length of approximately 32 characters and a micro-computer structure programmed to effect the typing performed with said keys; the typed text is then displayed for visual verification and stored line by line in a memory, where it remains even when the machine is not in use; the read key is then used to make the text reappear on said display, with the lines either in automatic timed succession or in the manually controlled appearance and disappearance of each line; the computer structure includes a series of commands to perform operating functions.

Claim 3

Miniaturized typewriter according to claim 1, characterized in that said programmed micro-computer structure for performing the typing with said keys provides for the presence of one or more microprocessors.

Claim 4

Miniaturized typewriter according to claims 1 and 2, characterized in that microprocessor(s) 1 allow the command and thus control of a succession of functional blocks arranged as follows: 2 - EPROM, PROM or ROM containing the control program; 3 - RAM (256x8bit) whose function is to store data, states, stacki. it must be 8 bit; 4 - RAM (nK x 6 bit) whose function is to store the memorized text in ASCI code; for a set limited to characters it does not have to be 8 bit, and is therefore made up of a 1 bit wide CHIP (integrated circuit); in this way, for example, 6 CHIPS 4 bit each give a memory field of 4K x 6 bit; the first 32 positions of this RAM are reserved for the software used to store data the machine is off; 5 - Clock generator; 6 - Qualification logic for the various units sharing the bus; 7 - PI01, carrying input and output characterized by 16 bit individually programmable input or output and by a programmable timer; 8 - Multiplexor for keyboard control; 9 - Matrix keyboard; 10 - Priority encoder for receiving data from the keyboard; 11 - Double function test; 12 - MASTER-CLEAR key; 13 - 32 character intelligent display: this consists of 8 blocks of 4 characters each, each receiving 7 bit ASCI data, 2bit character address on the impulse of the typing; 14 - Multiplexor; 15 - PI02, composed of 16individually programmable I/O bits, a pair of lines synchronized by a hand shaking mechanism and a 16 bit programmable timer; 16 - Buffer (current amplifier) for the printer parallel line; 17 - 16 bit counter with increment and reset functions; 18 - Voltage generator for cartridge programming; 19 - Memory on/off switch; 20 - Printer connection; 21 - Connection for inserting the EPROM/EEROM cartridge; 22 - Line adaptor to generate the following voltages: - 11V - 2A for battery recharge and typewriter use in fixed positions; - 15V ± 1V for the printer; 23 - Transformer and rectifier; 24 - Stabilizer; 25 - Double switch for activating the above mentioned voltages; 26 - UV lamp for erasing EPROM; 27 - Space for inserting EPROM cartridges; 28 - On/off switch for the UV lamp; 29 - Printer; 30 - Space in the carrying case to perform the following functions: - control of the VCC system voltage, established at 5V; - control of the standby voltage; - control of POMCL (Power on master clear) signal or on/off reset; 31 - Battery; 32 - Constant voltage generator for recharge; 33 - Switching relay for battery charging, from the condition in which they are charged to that in which they supply current; 34 - 5V stabilizer; 35 - Standby circuit: 35A, input for high yield output nonstabilized voltage, 35B, input for medium yield output voltage stabilized at 5 volts; 35C, output for standby voltage; 35D, comparator integrator for POMCL signal control; 35E, high capacity output capacitor; 36 - Expansion cartridge with two EPROM of 2Kbytes each (total: 4Kbytes); 37 - 2K byte EPROM; 38 - Application connector for hook-up with connector 21; 39 - Switching logic for programming impulse; 40 - Port for reading identification code; 41 - Control logic; 42 - General switch; 43 - MASTER-CLEAR; 44 - I/O ports initialization; 45 - Program asks if memory is on: 45A=No, 45B=Yes; 46 - Output on display: 'Memory not ready' 47 - Program asks if memory is on: 47A=Yes, 47B=No; 48 - Memory initialization; 49 - Determination of number of free lines 'n' and storage in the reserved area of memory 4; 50 - Program asks if memory initialization: 50A=Yes,50B=No; 51 - Read number of lines of memory 'n'; 5 2 - Beginning of process P 2 with interrupt every 2ms; 53 - Output on display: 'n' free lines ready; 54 - Output on display of the first line of the text; 55 - Process P 2 asks if a key has been read: 55A=No, 55B=Yes; 56 - Key interpretation; 57 - Program asks if key read is a control key: 57A=Yes, 57B=No; 58 - Memorization of the character in ASCI code; 59 - Output display of lien where the character was memorized; 60 - Process P 2 asks if a character has been read: 60A= No, 60B=Yes; 61 - Key interpretation; 62 - Program asks if command was given in repeat mode: 62A=Yes, 62B=No; 63 - Program asks if a command is the same as the previous one: 63A=Yes, 63B=No; 64 - Program asks if it is the command 'repeat': 64A=Yes, 64B=No; 65 - Program asks if it is a command: 65A=Yes, 65B=No; 66 - Program asks if it is the command 'repeat': 66A=Yes, 66B =No; 67 - Program asks if it is the command 'print': 67A=Yes, 67B=No; 68 - Calls the subroutine which executes the command; 69 - The printing loop asks if the printer is present: 69A=No, 69B=Yes; 70 - The printing loop asks if the printer is 24 or 32 columns: 70A=24 columns, 70B=32 columns; 71 - 24 character buffer line; 72 - 32 character buffer line; 73 - Output of buffer line on printer; 74 - The print loop asks if there is an error: 74A=Yes, 74B=No; 75 - The print loop asks if the line printed is the final one: 75B= Y es; 75A=No; 76 - The print loop asks if a 'STOP' character is in the line: 76A=Yes, 76B=no; 77 - The print loop asks if process P 2 has read a key: 77A=No, 778=Yes; 78 - The print loop asks if the key read is the 'STOP' command: 78A=Yes, 78B=No; 79 - Output of 'Printer not ready' message on display; 80 - Activation of P 2 process from interrupt; 81 - Keyboard control; 82 - Timer control; 83 - Cursor handling; 84 - Process P 2 asks if the memory is on: 84A=No, 84B=Yes; 85 - Interrupt return.

Claim 5

Typewriter according to claims 1 to 3, characterized in that the functions of EDIT and of control of components 2 to 85, corresponding to keys provided on the keyboard and implicit in said components 2 to 85, are designed so that each of the following keys performs the following respective function: LRST - Line reverse step - displays the previous line; RETURN - Return - displays the subsequent line; CST - Character step - stops the cursor in front of a character without changing the content of the display; CRST - Character reverse step - like CST, but behind; INLIN - Insert line - creates a one line space by shifting the entire text forward starting from the displayed line; DELIN - Delete line - erases the displayed line and contracts the text while destroying the space so created; INCAR - Insert character - Creates a space of one character by shifting the entire line to the right; starting from the cursor, the last character on the right is lost; DELCA - Delete character - erases the character indicated by the cursor and covers the space with the remaining part of the line by shifting it to the left and the final character to the right by one space; HOME - Reports the first line of the text on the display; BOT - (bottom) goes to the final line of the:itext; REPEAT - Initializes the repeat mode; PRINT - Prints the contents of the memory starting from the line displayed; during printing, only the STOP command may be given; STOP - During the typing phase, it displays a particular character which will be interpreted either in the print phase (PRINT), the timed viewing phase (TIME), the storage phase (SAVE) as a stop command, in the print phase (execution of the PRINT command), printing will stop and the machine will return to the typing phase, in the timed display phase (execution of the TIME command) it will return to the typing phase; CLRM - CLEAR MEMORY erases the entire memory; as protection against accidental pressure, before performing the erasure, the machine asks the question 'Clear Memory?' (Y/N); if Y= Yes is pressed, the memory is erased; if N=No is pressed, it is not; MCLER - Master Clear is a particular command to remove the calculator from an error situation which may be used following an internal error caused, for example, by discharged batteries, improper insertion of the power supply, improper insertion of the printer; FREE - Indicates the number of free lines; ADVP - Advance Paper - advances the paper in the printer; TIME - Effects a timed display of the text starting from the line on the display until the end of the typed text or until the particular character described above appears; SAVE - (followed by a six letter name) - stores the typing contained in the RAM in the cartridge by memorizing in a suitable table the name of the file and its initial and final address; this phase may be stopped by the following events: - the end of the text to be memorized due to the end of the RAM memory; - the end of the text to be memorized; - the end of the cartridge; in this case the machine displays a message to insert a new cartridge; LOAD - (followed by a six letter name) - reads the typewritten text from a file contained in the cartridge and memorizes it in the RAM; DETER - Asks the machine whether the typewritten text will fit in the present cartridge. The machine responds: (OK) if the text will fit; (MEMORY END AT) if the text will not fit and displays the first line which would be excluded; the following possibilities are then offered: - memorizing on two cartridges - leaving a part unmemorized - using a fresh cartridge - performing an EDIT of the text, eliminating the sections of less interest and replacing words with abbreviations.

Claim 6

Miniaturized typewritter according to claim 1, characterized in that said visual verification on the display occurs by placing on I/Oport 7 the 6 bit ASCI data for the character to be viewed; the seventh bit is the complement of the sixth, and the 2 bit address inside the display block for later typing is written on one of the 8 blocks through multiplexor 14.

Claim 7

Typewriter according to claims 1 to 4, characterized in that said timed automatic line succession as well as the LRST and DELCA functions occur in the already known 'repeat mode'; by.pressing the REPEAT command followed by the desired command, the latter is executed as long as the button is pressed; upon releasing the corresponding key, the 'repeat mode' is reset and an additional 'repeat mode' is possible only by re-pressing the REPEAT key.

Claim 8

Miniaturized typewrittercharacterized in that there are two parts to the power supply, one net adaptor (22) and one inserted in carrying case B (30), in which 30 shows the following properties: a) when 22 is connected and turned on, it is recharged by the constant voltage generator 32 and battery 31; through relay 33, switched in position 33A, it supplies energy to stabilizer 34; b) when 22 is disconnected or turned off, section 30 supplies energy to stabilizer 34 through battery 31; c) in the case of a switch from condition a to b or vice cersa, the input and output capacity keeps the output voltage from varying during the switching of relay 33; d) with power supply 30 either on or off, standby voltage is present; if the charge is removed (switch 19 open) and the standby power supply receives voltage from terminal 35A (general switch 42 open), the absorption of the latter is zero; if charge is inserted with 19 closed, output voltage is approximately 3.5 volts (R A M 4 maintenance voltage); if voltage is supplied through terminal 35B (switch 42 closed), output voltage is established at 5 volts (RAM 4 operating voltage); e) upon general ignition, working voltages VCC and VST are achieved; after a certain time, the POMCL signal is deactivated by 35D; if active, this signal keeps the electronic circuit under reset and disables the typing in the memory; f) when the general switch is opened, the POMCL signal is reactivated before the VCC and VST voltages degrade.

Claim 9

Miniaturized typewrittercharacterized in that there are two parts to the power supply, one net adaptor (22) and one inserted in carrying case B (30), in which 30 shows the following properties: a) when 22 is connected and turned on, it is recharged by the constant voltage generator 32 and battery 31; through relay 33, switched in position 33A, it supplies energy to stabilizer 34; b) when 22 is disconnected or turned off, section 30 supplies energy to stabilizer 34 through battery 31; c) in the case of a switch from condition a to b or vice cersa, the input and output capacity keeps the output voltage from varying during the switching of relay 33; d) with power supply 30 either on or off, standby voltage is present; if the charge is removed (switch 19 open) and the standby power supply receives voltage from terminal 35A (general switch 42 open), the absorption of the latter is zero; if charge is inserted with 19 closed, output voltage is approximately 3.5 volts (R A M 4 maintenance voltage); if voltage is supplied through terminal 35B (switch 42 closed), output voltage is established at 5 volts (RAM 4 operating voltage); e) upon general ignition, working voltages VCC and VST are achieved; after a certain time, the POMCL signal is deactivated by 35D; if active, this signal keeps the electronic circuit under reset and disables the typing in the memory; f) when the general switch is opened, the POMCL signal is reactivated before the VCC and VST voltages degrade.

Claim 10

Miniaturized typewriter according to claim 1, characterized in that electrical power is supplied by replaceable electrical batteries.

Claim 11

Miniaturized typewriter according to claim 1, characterized by the presence of a traditional type keyboard coupled with an incorporated printing device of a known type.

Claim 12

Miniaturized typewriter according to claim 1, characterized by the presence of a terminal to be connected with the micro-computer inside a paper printer, to which the memorized information may be sent via a cable for mechanical typing at the same time as the text appears on the display or independently of its appearance.