Abstract: The key comprises a movable part guided in a fixed support on a base plate and contacts which are closed when the key is depressed against the action of a return spring. The symbol associated with the key is displayed through a window in the key top by an LCD device with a matrix of display areas controlled by an integrated circuit bonded to the underside of the LCD device and fed with signals from the CPU via conductors which enable the integrated circuit to be programmed to define the symbol to be displayed, whereby the keys of a keyboard can be set to match the language currently being used. In an alternative embodiment the key is supported by a flat cable connected with an input circuit of the keyboard and the terminals of the LCD device.

Abstract: An electronic typewriter comprises a character-bearing disk movable along the platen and a selector to space selected characters according to a plurality of constant spaces or proportional spaces. A permanent, alterable memory has a series of locations, wherein are recorded positioning information for the disk and the platen and constant phrases. A series of keys are operable to select associated registers of the memory to execute the movement of the disk or the printing of the recorded constant phrases, as recorded. An evidence selector is further operable at any point of the printing line to cause an evidence of printed character as bold-facing or underlining and a cancel key is provided to automatically cancel the already printed characters.The characters are carried by regularly spaced petals of the disk.

Abstract: The calculator is small enough and well protected enough to be carried in the pocket. In addition to a keyboard 28, circuit board 29, batteries 18 and an LCD data display 91, there is a printer comprising a platen 36 which draws paper from a roll in a compartment 101. A thermal printing head 33 is reciprocated along the writing line by a pin 44 engaging in an eccentric cam groove in a disc 46 rotated by a crown wheel 53 and a pinion 54 on the shaft of a motor. Another cam-follower pin 64 reciprocates a slide 66 which advances the platen incrementally after each traverse of the head 33. A slidable cover 14 is shown open, exposing the printing mechanism and operating a switch which enables the printer. Results appear on the LCD display and are printed. When the cover is slid closed it protects the printing mechanism and disables it via the switch. The calculator can nevertheless be used without the printer, results being displayed only on the LCD display 91.

Abstract: An electronic typewriter having a display device which shows just the last entered characters of a printing line. The typewriter comprises a selector for an immediate typing mode of the entered character, a line/line mode in which each line is set up in memory and typed on operating a service key, and a word/word mode in which the set up words are typed word by word, i.e. on each operation of the space bar. This facilitates typing with checking to eliminate all errors. The display device shows emphasized characters, different kinds of emphasis (heavy type, light type on dark background being indicated by different luminous dot patterns under the characters. The display device is of the dot matrix type and, by suitable circuits thereto superposed characters, e.g. 0 and 1 yielding .phi., are correctly shown.

Abstract: An electronic computer is provided with a numerical keyboard, a microprogrammed CPU, as well as RAMs and ROMs, some of them of pluggable type. A pluggable ROM stores a plurality of programs and comprises a portion formed of an associated plurality of registers each one storing a jump instruction and the associated programs. The numerical addresses of said registers are represented by a series of numerals which can be entered by the keyboard. Programs can be entered from the numerical keyboard into a RAM memory, in form of a sequence of numerical codes, each code corresponding to a subroutine prerecorded in a ROM. Each program so "learned" by the computer can be repeatedly executed by depressing a fixed code on the keyboard.