A light-spot-emitting stylus (21) is utilized by an operator to write graphical information on the surface of a simple multilayer planar transducer device (10) that includes a photoconductive layer (16) sandwiched between a transparent conductive layer (14) and a resistive layer (18) that includes spaced-apart electrodes (23 through 32 . . . ). In response to the writing spot, the transducer device generates electrical output signals indicative of successive coordinate positions of the spot on t...

The invention relates to graphic symbol display means, and more particularly to a high speed system for presenting images of individual letters, numerals, etc., along a common optical axis of the system which have been selected from an illuminated matrix array of such symbols. The system is directed toward use in electronic computer output controlled printers or photocomposing machines.

A facsimile recorder for marking electro-sensitive paper including a housing with a base and a cover and a platform disposed within the housing for receiving a cassette which contains a web of paper stored as a roll. A scanning electrode is disposed within the housing in front of the platform and a linear electrode is operatively disposed relative to the scanning electrode. The linear electrode is arranged substantially normal to the path of the paper and parallel to the axis of the paper roll. ...

A graphic recorder convertible for use with multiple width strip chart paper. A rotatable main drum carries sets of sprocket teeth for transporting strip charts along an information transfer head. At least one set of sprocket teeth is formed by separable sprocket sections which are detachably mounted about a recess in the drum for use with a strip chart of one width. Filler inserts are mounted in the recess in place of the separable sprockets for use with a chart of another width. Means is provi...

A signal generator (20) for a graphic TV console equipped with an image memory (30); the generator generates a signal SYNC for synchronizing the TV scan, reading address signals for the image memory and timing signals for controlling an external graphic unit. The generator includes a clock (21); a synchronous counter (22 and 23), logic means (24 and 25) enabling the signal SYNC and the luminance test signals to be generated, and a multiplexer (26) for multiplexing the read and write address sign...

Graphic communication apparatus for electronically writing information and transmitting includes a pen having a pair of windings disposed in a predetermined angular relation with respect to each other, and a writing surface having a plurality of windings arranged substantially parallel to each other for sensing the presence of the pen from the magnetic fields of the pen coils to provide differential outputs over the writing surface with respect to the windings of the pen apparatus, and the diffe...

A symbol generator for drawing alphanumeric characters and simple geometric figures by a dot method. According to the invention, the format and the size of the symbols may be modified. The generator 60 operates under the control of a data bus MPDB and includes: a writing unit 61 comprising counters 62 and 63 and a logic writing means 64; a read-only character memory (ROM) 65 and a writing pointer 66 comprising two registers 67 and 68. A symbol generator according to the invention may be used in ...

Disclosed is an interactive graphic apparatus for obtaining a desired formal drawing from a manuscript bearing rough drawings depicted thereon. In this apparatus, the operator can automatically draw onto a drawing paper put on a drawing table, on the basis of the positional information items of drawings on a manuscript disposed on a reading table and the functional information items inputted from a key board. The apparatus has particularly three component elements of digitizer, controlling devic...

A keyboard has first and second nested planar members with depressions formed thereon. The upper member is transparent. The lower member may be color coded and carry replaceable key indicia in the depressions. The laminated overlay nested planar members are disposed adjacent to a conventional elastomeric diaphragm switch assembly having an upper layer of shaped protrusions abutting the lower most inner surfaces of the second or lower member depressions. Frame structure of variable form assists i...

A digital processor for producing and displaying a graphic image on a CRT screen designed for TV frame scanning. It comprises on a single microchip of a semi-conductor substrate the following principal elements: a vector generator A, a symbol generator B, a control unit I, a writing pointer and address multiplexers, and the following auxiliary elements: a register for reading a light pen, command registers, control registers and data-storage registers, etc.