Abstract: A temperature-responsive record material for use in a thermographic recording and reproducing apparatus comprising a supporting sheet carrying a single layer containing, as the temperature-sensitive composition, a mixture resulting by a dispersion of a basic chromogenic compound and of an acidic compound in a binder having as assential binding agent a latex or a mixture of a latex with a non-ionic cellulose ether.

Abstract: A magnetic information recording and reading device is embodied in an electronic equipment for the data processing. On a plurality of parallel tracks of a magnetic tape are recorded information blocks aligned at the starting point so as to form a matrix of information blocks. Each column of information blocks is addressable by a corresponding address recorded in a further track of the tape. Each address block comprises a timing character sequence for the addressing of an information block and for synchronizing the reading and/or the recording of data. The energization of a recording head is controlled by the readinng of timing character included in the corresponding address block so that the recording starting point of each of the information blocks are perfectly aligned independently from the speed of the tape.

Abstract: A device for reading from and writing on, magnetic cards for use in a desk-top computer having a cover with an introduction slot and an exit slot for the cards. The device comprises two parallel guides between the introduction and exit slots for defining the path to be traversed by the cards, two support plates for the guides disposed perpendicular thereto for guiding the lateral edges of the cards and a belt cooperating with pressure rollers to entrain the card as it passes through the guides. The device also includes a microswitch and a shoe which has two projections contacting the non-magnetizable face of the card, the shoe being hinged on a lever actuating the microswitch when the card has passed below the projections.

Abstract: An electroerosion apparatus utilizing a wire electrode supported at opposite sides of a workpiece is adapted to cut a given profile in the workpiece with a rake by shifting the electrode supports and thereby inclining the electrode with respect to the cutting plane. The electrode supports are at the end of two arms which can move in coordinate axes in conjunction with the movement of the workpiece table to define the profile by means of orthogonal coordinate control.

Abstract: This apparatus is used for recording and/or playing back a magnetic tape contained in a cassette provided with a hole for receiving a capstan roller and edge apertures for receiving a pressure roller adapted to press the tape against the capstan roller and a recording and/or reading head. The pressure roller is rotatably mounted between two parallel support levers which are pivotally mounted on the base about the same pivotal axis. A third lever pivoted about the said axis is coupled to the support levers by a lost motion coupling allowing limited relative pivotal mouvement between the support levers on the one hand and the third lever on the other hand. This apparatus further comprises a single actuation member which is movably mounted on the base to move the third lever to a position in which the pressure roller is moved into its position of engagement.

Abstract: A serial printing device comprises a type drum rotatably mounted on a carriage which can move parallely to a platen. On the periphery of the type drum are mounted a plurality of character-bearing elements urged against the drum by biasing means. A stepping motor rotates the drum for positioning a selected character-bearing element in front of the platen. A hammer is actuatable for pushing the selected character-bearing element radially outwardly relative to the drum against the action of the biasing means, and the drum is moved towards the platen simultaneously to the actuation of the hammer.

Abstract: An automatic text processing system, wherein a text is printed by a typewriter and simultaneously recorded line by line in corresponding blocks of a magnetic tape. The system automatically prints the address of the block in which each line is stored, whereby an operator can cause the system to print selected lines of the text by posting the corresponding addresses on the typewriter. The lines or paragraphs of a text can be cancelled or added and their succession can be changed, by posting the addresses of the lines which are to be cancelled, added or shifted in the text. The fair copy is then automatically printed with the lines justified according to a format selected by the operator. According to another embodiment the system can be used to automatically search the information recorded on the magnetic tape.

Abstract: A data processing unit having a plurality of hardware data processing circuits each one including a program counter register for addressing the microinstructions, an accumulator register and an addressing register for storing the addressing of the operands of the microinstructions. Means are provided for switching the CPU from the hardware data processing circuits having a predetermined priority level to the hardware data processing circuits having a less priority level, by executing a particular microinstruction, which includes information either about the changing of the priority level or about the memory address of the starting microinstruction of the microprogram to be executed on the less priority level.

Abstract: A desk-top electronic computer with MOS circuit logic comprising an input device, an output device and a logic unit adapted to carry out the various operations of the computer. The logic unit is disposed on at least two MOS circuit chips synchronized by a main oscillator. Each MOS chip is provided with a corresponding timing circuit adapted to generate mutually coordinated timing signals. The logic unit includes a read only memory or ROM for storing the microinstructions commanding the various functions, a computing unit and a control unit adapted to permit the selection of the microinstructions from the ROM by addressed access for the purpose of supplying a sequence of microinstructions to the computing unit, access of the address and output of the microinstructions taking place through a single connection between the ROM and the control unit.

Abstract: This invention relates to liquid crystal display devices. One aspect of the invention concerns the electrolytic growing of projections on one plate of the device so that the projections register with the tin-oxide segment array on the other plate; another aspect concerns utilizing similar projections as internally placed spacers. An insulative sheet is deposited over the segment array in order to filter D.C. components, according to a third aspect of the invention, and, according to a fourth aspect, a spacing technique is disclosed which utilizes alumina particles in a glass matrix as an edge spacer. Further, a light concentration technique, utilizing a one-way mirror and a prism or fiber optic assembly, is disclosed.

Abstract: A non-impact printing system in which a photoconductor is illuminated with a light image of the character to be printed while applying a voltage across the photoconductor and a transparent insulating belt held in contact with the illuminated portion of the photoconductor. This results in the depositing of a latent electrostatic image of the character on the surface of the belt in contact with the photoconductor layer. The belt is then transported past a developing station where the image is developed with a toner and then transferred to plain paper.