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6158857 |
Internal drum communication using a capacitor
An ink-jet printer for ink-jet printing onto a print media. The printer has an ink-jet cartridge for ejecting ink onto a print medium during printing operations. A rotating drum platen holds a...
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5550533 |
High bandwidth self-timed data clocking scheme for memory bus implementation
A clocking scheme for transferring data between electronic devices. The clocking scheme includes sending a data request signal from a first device to a second device during a first system clocking...
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5542487 |
Portable compact multi-function printer with cartridge paper supply
A data system includes a portable printer unit and a portable data collection terminal. The printer unit and the data collection terminal are communicatively coupled by a data link which may be a...
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5050005 |
Facsimile apparatus
A facsimile apparatus connected on an ISDN side in a communication network in which the ISDN is connected to a telephone network includes network identifying means for identifying whether an...
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4803312 |
Interface between personal computer and telex communication system
An intelligent interface to enable a personal computer or the like to be used as a telex transceiver.
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4792648 |
Telematic reception terminal
A method for controlling the sending of a response from a telematic reception terminal (teletex, G4 facsimile, and mixed mode) is provided. The receiver includes a PAMB counter whose count...
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4749825 |
Facsimile and radio teletype broadcast signal decoder
A method and apparatus are provided for decoding both radio facsimile and radio teletype broadcast signals. A zero crossing detector detects zero crossings of the broadcast signal and generates a...
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4697243 |
Methods of servicing an elevator system
A method of integrating an expert system having a knowledge base of elevator trouble-shooting information into the working environment of elevator service personnel, without special training of...
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4677257 |
Telematic system and method of controlling the same
In a telematic system, a plurality of response timings for a page boundary command, a page end command and the like from a sending system are prepared. A proper timing is selected in accordance...
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4590330 |
Printer
A printer includes a carriage supporting a print head and movable across print paper for enabling the print head to print on the print paper, a fixed frame, a switch device mounted on one of the...
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4575579 |
Editing arrangement for videotex system with public terminals
In public videotex (Btx) terminals, different pages are displayed successively on the screen in the off-line mode (e.g., advertisements and user instructions). To be able to update such off-line...
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4524242 |
Low-cost electronic mail terminal
An electronic mail terminal 10 that includes a keyboard 12, multi-character display 14, thermal printer 22, tape drive 118, and communication and control circuitry. The tape drive and printer mount...
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4501930 |
Teleprinter
A teleprinter has a printer for printing received or manually entered characters in a row-by-row fashion. The characters of a row are initially stored, and only following the occurrence of a...
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4432090 |
Automatic error correction system for teleprinter traffic with bunched repetition
The disclosure concerns a communication system for line printers, such as teleprinter equipment, via high-quality radio communications. The repetition of the signals received mutilated takes place...
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4380009 |
Message communication system
A message communication system which provides instant messages and memoranda at a telephone user's desk. In an office complex, a message is transmitted over pre-existing office power lines to...
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4282399 |
Shared maintenance terminal system
A shared maintenance terminal system permitting the joint use of a teletypewriter located at a telephone switching center by the switching center and by a remotely located data processing center....
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4243836 |
Digital autostart circuit
A terminal unit having a digital autostart circuit for energizing an output device such as a teleprinter. The autostart circuit responds only to the space character which is transmitted between...
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4191848 |
Teletypewriter motor controlling
The first signal transition of a teletypewriter signal triggers a resettable one-shot that activates the motor run switch to turn the teletypewriter motor on for a minimum interval of from two...
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4185166 |
Multi-mode digital enciphering system
The specification discloses an electronic digital enciphering system which is selectively operable in a plurality of different modes. The system may be operated in an off-line mode for preparing...
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4160874 |
Process for signaling an interruption in the state of readiness for the reception in data terminal devices in which data are exchanged
In a process for signaling an interruption in the state of readiness of a data terminal device in a called station, the data being transmitted over a data selector network, and in particular for...
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4148066 |
Interface for enabling continuous high speed row grabbing video display with real time hard copy print out thereof
An interface for enabling continuous high speed row grabbing video display with real time hard copy print out thereof interfaces a hard copy printer with a real time frame grabbing video display...
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4132979 |
Method and apparatus for controlling a programmable logic array
A circuit is described for controlling a programmable logic array adapted for use with a communications terminal. The logic array includes an input AND-section defined by a plurality of addressable...
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4093819 |
Closed user group facility
A closed user group facility in a data transmission system which has a closed user group of terminals accomodated in a switching network, and in which the switching network registers a terminating...
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4054745 |
Motor control device for data terminals
A control device is described for linking a motor operated data terminal to a data processor which provides information signals including data characters and data terminal motor-start signals. The...
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4021608 |
Print-on-the-fly pager
A hand held pager is disclosed which displays a transmitted message in hard copy form on a tape to permit a written record of the message for readout at the convenience of the recipient of the...
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4009342 |
Circuit arrangement for communication facilities wherein transmission paths can be employed for different types of message switching
Apparatus is described for telecommunication facilities having transmission paths capable of accommodating different types of message switching, e.g., voice communications and data communications....
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3995106 |
Information transmission system
The invention refers to a system for rapidly transferring optical information from a document to a human being over a telecommunication channel. The system comprises an optical reader connected...
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3944724 |
Paging system with selectively actuable pocket printers
A paging system, or the like, having a transmitting station and a plurality of pocket sized subscriber units is disclosed. The transmitting station has a keyboard for encoding alphanumeric...
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3938187 |
System for putting an information record onto a magnetic substrate
An information recording system comprises a peripheral control unit for recording bits of a character one at a time coincident with the middle of a record time interval. The peripheral control unit...
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3916090 |
Intracommunication system for a communications terminal
A telecommunications terminal which is divided into at least two portions; specifically, a keyboard portion and a central portion with a display and a memory, in which the depression of a key on...
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3909510 |
Direct connection digital transmission apparatus
Apparatus is disclosed for interconnecting digital data stations through a transmission medium such as a directly connected unloaded pair of wires. The apparatus transmits data as polarity, or more...
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3806631 |
ELECTRICAL ANSWERBACK SYSTEM FOR A TELEGRAPHIC TRANSPONDER
A teletype recognition and identification system wherein a sending station transmits a known interrogation serial pulse code responsive to which one particular receiving station transmits a serial...
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3803346 |
CIRCUIT ARRANGEMENT FOR THE TRANSFORMATION OF DIRECT CURRENT TELEGRAPHY SIGNALS
A circuit arrangement for converting single current, direct current telegraphy signals into double current signals is described. The double current signals operate a double current telegraphy...
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3800069 |
SINGLE STEP TAPE READER
A telegraph transmitter is adapted to generate a stream of output signals while operating in a continuous or running mode as an encoded punched tape incrementally is driven past a sensing station...
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3798549 |
APPARATUS FOR TRANSMITTING DATA OVER RADIO CONNECTIONS
Circuitry is described which facilitates data transmission over radio links by preventing receiver errors, even when call addresses are distorted. The incoming call addresses consisting of several...
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3796995 |
REMOTE CODED DUAL STATE CONTROLLER APPARATUS
A remote station for a loop communication system includes a point module which is specifically related to an on-off load control or the like. The point module is coupled to the loop system through...
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3778540 |
AUTOMATIC ELECTRONIC HERE IS GENERATOR
A "here is" generator, for an automatic answering data terminal, which generates a WRU code and applies it to the terminal's answer-back mechanism. The generator has a square wave oscillator and a...
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3757032 |
METHOD AND APPARATUS FOR SELECTIVELY ENABLING A REMOTE RECEIVER
An information transmission and recording system wherein a character is arranged in a dot-matrix form and the signals which represent the dots are transmitted column by column of the matrix in...
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3743763 |
DATA TERMINAL WITH AUTOMATIC RESPONSE FEATURE
A data terminal which transmits binary-coded indicia representing characters in response to the operation of keys of a keyboard is provided with means different from the keyboard for automatically...
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3701841 |
DATA TRANSMISSION BY TELEPRINTER
Terminal station equipment for exchange of messages with a central data collecting station, including both message characters and service functions. The terminal station equipment includes a...
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3699525 |
USE OF CONTROL WORDS TO CHANGE CONFIGURATION AND OPERATING MODE OF A DATA COMMUNICATION SYSTEM
A data communication system comprising a processor, a memory, a communications controller and a plurality of terminal devices utilizes control words to select the configuration and to select the...
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3684822 |
METHOD FOR CENTRALIZING THE FUNCTIONS OF SINGLE CURRENT-DOUBLE CURRENT CONVERTER CIRCUITS IN CENTRALLY CONTROLLED TELEPRINTER DIAL SWITCHING INSTALLATIONS
A method is described for the conversion of single current to double current signals in teleprinter dial switching installations having a central control. The control system operates to control the...
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3678179 |
TERMINAL APPARATUS
A printing terminal apparatus for data transmission is adapted to transmit at the beginning of each message sent to a central computer, a code combination indicative of the terminal operator and to...
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3673570 |
COMBINATION EMITTER FOLLOWER DIGITAL LINE DRIVER/SENSOR
A combined digital line driver and sensor for both transmitting and receig digital control signals between a plurality of stations over a single conductor. Each station includes an emitter follower...
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3646573 |
CIRCUITS FOR INTERCONVERTING GROUPS OF PARALLEL FORM AND SERIAL FORM SIGNAL BITS
A system for linking a first typewriter with a remote typewriter or other data processing device, whereby the first typewriter transmits groups of binary signal bits indicative of typewriter...
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3636245 |
MATRIX AMPLIFIER WITH GAIN ADJUSTING MEANS INEFFECTIVE TO ALTER THE COLOR OF BLACK
A solid-state matrix amplifier network is set forth and described for selectively combining three color-difference signals from a chrominance demodulator with a luminance signal to form suitable...
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3623068 |
SERVING DISPLAY FUNCTIONS BY MEANS OF CODED SPACE INFORMATION
Disclosed is a display system including a regenerative display and a memory where the memory provides the information which is displayed. The memory addresses have a one-for-one correlation with...
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3622889 |
BANDPASS RESPONSE DISPLAY
A method of testing and aligning a voltage controlled tuner provides a simultaneous display of the low and high-channel frequency response to facilitate setting of the adjustable tuning reactances....
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3601539 |
PHASE SYNCHRONISM SYSTEM FOR A ONE-WAY TELEGRAPH CONNECTION
A one-way telegraph system for permitting recurring phase synchronism checks by transmitting at predetermined intervals a definite series of alternate special service and/or idle time signals which...
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3593293 |
REMOTE CONTROL AND DATA LOGGING SYSTEM
A data reporting, logging and remote control system utilizing teleprinter code for transmission of orders and reporting information between a control station and one or several outstations.
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