Automatic Patents (Class 178/3)
  • Patent number: 10929314
    Abstract: According to various embodiments, an interface device may be provided. The interface device may include: an interface to a host computer; a wireless interface to a peripheral device; a difference determination circuit configured to determine a difference between timeslots in the host computer and time slots in the peripheral device; and a notification circuit configured to notify the peripheral device about the difference if the determined difference is larger than a pre-determined threshold.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: February 23, 2021
    Assignee: RAZER (ASIA-PACIFIC) PTE. LTD.
    Inventors: Kah Yong Lee, Chee Oei Chan
  • Patent number: 10635037
    Abstract: Provided is an image forming apparatus that when a mobile terminal and image forming apparatus are used in combination, causes an operation to be performed by operating only one side. The image forming apparatus is used by being connected to a mobile terminal provided with a terminal side touch panel display. The communicating unit communicates with the mobile terminal and exchanges data. The apparatus side touch panel display is used for self operation of the image forming apparatus. The control unit, via the communicating unit, receives terminal side image data as content that is displayed on the terminal side touch panel display of the mobile terminal from the mobile terminal side, transmits apparatus side operation data corresponding to the content operated by a user on the apparatus side touch panel display to the mobile terminal side, and causes an application in the mobile terminal to be executed using the apparatus side operation data.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: April 28, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Atsushi Suzuki
  • Patent number: 10467172
    Abstract: A mass data storage system includes a number of communicatively coupled storage drives powered and controlled by shared control electronics. The shared control electronics are configured to transmit analog read/write signals through an interconnect to each of the multiple individually selectable storage drives. The interconnect bi-directionally couples the control electronics to each of the multiple selectable storage drives.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: November 5, 2019
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: John Wayne Shaw, II, Philip Jurey, Robert John Dore, Jr., Anthony John Pronozuk
  • Patent number: 10080069
    Abstract: Disclosed are apparatus and related methodologies for transmitting data related to utility conditions between monitoring locations and a central and/or data collection facility using a meter reading system. Collection of both corrected and uncorrected data from meters is achieved to thereby provide backup data in case of corrector failure. The presently disclosed subject matter also provides for the collection of telemetry data and alarms from correctors and recorders over a meter reading system. Two-way communications over a meter reading system is also provided to permit data transmission to selected endpoint devices.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: September 18, 2018
    Assignee: ITRON, INC.
    Inventors: Mark K. Cornwall, James P. Ogle
  • Patent number: 9462591
    Abstract: A mobile communications network for communicating data to/from mobile communications devices, including a core network part including plural infrastructure equipment, and a radio network part including plural base stations communicating data to/from the mobile communications devices.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: October 4, 2016
    Assignee: SCA IPLA Holdings Inc.
    Inventor: Robert Zakrzewski
  • Patent number: 9439175
    Abstract: A mobile communications device to communicate data to/from a mobile communications network, and to communicate an indication of a relative type of data packets for communication via a communications bearer for supporting a communications session of the mobile communications device, the indication used to configure the communications bearer, and to communicate the data packets via the communications bearer to the infrastructure equipment via the base stations in accordance with the indication, the communication of the data packets being controlled by the mobile communications network in accordance with the communicated indication. By providing the indication, such as an indication that the data packets are of low priority or are generated or being received by a machine type communication application, the mobile communications network can control the communication of the data packets from the communications bearer differently to data packets communicated via other communications bearer having a higher priority.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: September 6, 2016
    Assignee: SCA IPLA Holdings Inc.
    Inventor: Robert Zakrzewski
  • Patent number: 9319103
    Abstract: Systems and methods are operable to communicate information to a direct current (DC) powered electronic device. An exemplary embodiment receives alternating current (AC) power with an AC information signal modulated thereon, converts the received AC power to DC power, demodulates the received AC information signal to determine information, modulates the information onto the transmitted DC power as a DC information signal, transmits the DC power with the DC information signal over a DC connector to the DC powered electronic device, detects the DC information signal on the modulated DC power at the DC powered electronic device, demodulates the DC information signal from the received DC power, and determines the information at the DC powered electronic device based upon the demodulated DC information.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: April 19, 2016
    Assignee: EchoStar UK Holdings Limited
    Inventors: David Robert Burton, Martyn Ward
  • Patent number: 9288809
    Abstract: An infrastructure equipment forming part of a mobile communications network to communicate data to/from mobile communications devices. The infrastructure equipment receives an indication of a relative type of data packets for communication via a communications bearer supporting a communications session of a mobile communications device, the indication to configure the communications bearer, to provide the communications bearer from the mobile communications device based on the indication, and to control communication of the data packets via the communications bearer based on the indication. By providing the indication, such as an indication the data packets are of low priority or are generated or received by a machine type communication application, the mobile communications network can control communication of the data packets from the communications bearer differently to data packets communicated via other communications bearer having a higher priority.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: March 15, 2016
    Assignee: SCA IPLA Holdings Inc.
    Inventor: Robert Zakrzewski
  • Publication number: 20040085574
    Abstract: A removable and re-attachable keyboard device for interfacing with an imaging device in a position adjacent to a display on the imaging device is presented. The keyboard device docks or otherwise couples the imaging device as opposed to residing on the table or base upon which the imaging device resides. The keyboard device includes a keyboard base which is generally planar with one end thereof being a keyboard base interface for facilitating at least mechanical coupling of the keyboard device with the imaging device and a keyboard. The keyboard base supports and maintains the keyboard in an ergonomic and more user-friendly attitude in relationship to a display of the imaging device. Messaging services are also available for dispatching directly from the imaging device as a result of data input to the keyboard device.
    Type: Application
    Filed: November 4, 2002
    Publication date: May 6, 2004
    Inventors: Kevin Falk, Russell A. Mendenhall, Joseph J. Cooper
  • Patent number: 5257160
    Abstract: A serial signal transmission device and a control method for determining polarity which can be used in various systems, for example, air conditioners, and a remote controller. The serial signal transmission device which carries out signal transmission between a plurality of control devices uses two transmission wires with fixed polarity, the serial transmission interface of each control device is equipped with two pairs of differential drivers and receivers, and the driver outputs and receiver inputs of different polarity in these two pairs of drivers and receivers are connected to each other. This device and control method make connection terminals for signal lines on each control device nonpolar, considerably reducing workload required for installing the apparatuses and wiring and eliminating connection errors.
    Type: Grant
    Filed: April 11, 1991
    Date of Patent: October 26, 1993
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Koji Yokohama, Fumio Aoi, Kanji Isomichi, Atsushi Hirose, Hitoshi Yasuda, Chuzo Ninagawa
  • Patent number: 5117070
    Abstract: A data transmission control processing system comprising the steps of easily realizing the reading, writing of the memories of the other terminals coupled with the above described transmission passages in a system where a plurality of terminals provided with a transmitting, receiving control processing portion for transmitting receiving the control signals are coupled by transmitting passages so as to effect the mutual communication, realizing the writing onto the memories by a system similar to the reading of the memories when the above described system is a system by the D2B, being capable of easily coping with respect to the expansion of the reading.writing control operation of the memories, simplifying the realization of the reading.writing control sequence which is adapted to reduce the amount of the telegraphic messages to be exchanged in the reading.writing operation of the memories on the other terminal.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: May 26, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Reiko Ueno, Naofumi Nakatani, Masao Ikezaki, Terumasa Yamamoto, Hiromasa Nakatsu
  • Patent number: 4835346
    Abstract: A device for transmitting data between a transmitter provided with standard software adapted to a serial interface and a standard receiver provided with a serial interface is presented. The device includes a serial interface simulator which replaces the serial interface of the transmitter, a memory which stores data received by the serial interface simulator, and an interface which transmits to the receiver the data stored in the memory. The serial interface simulator includes a data transmission register, a data reception register, a first buffer register, a second buffer register, a bus, a simulation control register and a simulation state register.The standard software places data in the data transmission register and receives data from the data reception register. Data placed in the data transmission register is not immediately serially transmitted to the receiver, but is transferred to the first buffer register from where it is transferred to the memory.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: May 30, 1989
    Assignee: Hewlett-Packard Company
    Inventors: Joel Setton, Jean-Marc Laugenie
  • Patent number: 4801934
    Abstract: In a transmission network having a tree structure in which data is forwarded from the tree branches toward the trunk at periodic intervals, the data which is transmitted between the several network levels is transmitted in data blocks each having a status field and a data field, the status field identifying the status of stations at a lower level in the network. The information in the status field is reduced by deleting data corresponding to a predetermined status information content corresponding to the most probable configuration of such data. The remaining status data is divided into sub-sets and transmitted with an individual sub-address for each sub-set, and a control signal identifying the number of sub-sets which are transmitted, and an address identifying the sending station.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: January 31, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans Herkert
  • Patent number: 4786763
    Abstract: A circuit for the transmission of data signals between subscriber terminals operating with different data transmission procedures is described. Data signals are transmitted between a subscriber terminal operating with a first transmission procedure and a subscriber terminal operating with a second transmission procedure, attainable only through manually switched connections. A manual switchboard having at least one job memory unit and a control unit is provided. Jobs for connections to be manually switched, respectively containing at least a job number, as well as selection data, serving for the establishment of connections and data signals to be transmitted, are written into the job memory unit. These jobs are output in the sequence in which they were input, such that the control unit maintains, for each job, only the selection data required for the setting-up of a connection and the associated data signals for a conversion and related forwarding.
    Type: Grant
    Filed: March 30, 1988
    Date of Patent: November 22, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hinrich Schumacher
  • Patent number: 4760395
    Abstract: A communications network (K) provides the integration of at least two networks with different network architectures, (SNA, DCNA, DECNET). The communications network as such exhibits its own specific network architecture (ICNA) independent of the aforementioned architectures. To the selector system (V) of the network are connected pieces of conversion equipment (CEI, CDI, CSI, CIE, CIS, CID). Pieces of equipment for different network architectures are capable of being linked via the aforementioned pieces of conversion equipment. Connections between equipment belonging to the specific network architecture (ICNA) and a second network architecture are routed via a piece of conversion equipment and connections between equipment belonging to two other network architectures are routed via two pieces of conversion equipment wired in series.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: July 26, 1988
    Inventors: Kurt Katzeff, Bengt Akesson
  • Patent number: 4700020
    Abstract: A data transmission system has a number of control devices connected via a transmission loop. Each control device includes signal processing circuitry which compiles data signals to be transmitted in the form of a data signal block. The signal processing circuitry is followed by a transmit buffer, which includes a write/read memory. A prepared data signal block can be accepted into this memory. A counter is connected to the memory which continuously addresses the memory for accepting a data signal block, and for emission thereof to the loop upon the appearance of a transmit authorization signal. The write/read memory is followed by a register. In addition to memory locations for accepting a data signal word, this register additionally includes memory locations for auxiliary information to be attached to the individual data signal words. The auxiliary information is derived from counter readings of the counter.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: October 13, 1987
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karl-Heinz Michels-Krohn, Josef Untergruber, deceased
  • Patent number: 4700021
    Abstract: A system for transmitting data signals between control devices connected to each other by a transmission loop operated directionally dependent has a number of such control devices connected to the loop, with each control device including a signal compiler which compiles data signals to be transmitted in the form of a data signal block which includes at least one receiver address identifying another control device which is intended to receive the transmitted signal block. The signal compiler is followed by a transmit buffer which includes an intermediate storage. A prepared data signal block is accepted in the intermediate storage. A buffer control is connected to the intermediate storage. A transmit authorization signal is transmitted via the loop from control device to control device. Upon receipt of the transmit authoriztion signal by the relevant control device, the buffer control therein enables a word-by-word read-out of the data signal block stored in the intermediate storage.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: October 13, 1987
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karl-Heinz Michels-Krohn, Josef Untergruber, deceased
  • Patent number: 4667320
    Abstract: A multi-stage space-division switching network comprises groups of regenerators (RE1 to RE16) connected to input lines and to output lines of the switching network, it further includes groups of regenerators (RS1 to RS16) connected to a first end of intermediate links (LI1 to LI28) interconnecting two stages and groups of regenerators (R3.1 to R3.16) connected to the other ends of the intermediate links. A monitoring device comprises sampling devices (P) connected to the groups of regenerators and to a comparator circuit (CC). A main marker (MQP) receives connection instructions and sampling instructions and transmits these instructions to auxillary markers (MQ) which control the sampling circuits (P) and the switching circuits (C1, C2) of the switching network.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: May 19, 1987
    Assignee: Compagnie Industrielle des Telecommunications Cit-Alcatel
    Inventors: Guy Onno, Jean-Yves Jaouen
  • Patent number: 4602252
    Abstract: A method for data communication usable for a system having a common transmission line, a plurality of transceivers connected to the common transmission line, and a data processing equipment connected to each of the transceivers, the system being arranged such that data from the data processing equipment is sent to the common transmission line through the corresponding transceiver, while data from the common transmission line is sent to the data processing equipment through the corresponding transceiver, thereby effecting a data communication between data processing equipment, wherein when a request to send data is sent from the data processing equipment to the corresponding transceiver, a carrier signal is sent to the common transmission line, and when the fact that no data is sent from any of the other transceivers to the common transmission line is detected during a given period of time after the sending of the carrier signal, the transceiver gives a permission to send data, to the corresponding data proces
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: July 22, 1986
    Assignees: Hitachi, Ltd., Yagi Antenna Co., Ltd.
    Inventors: Yukio Nakata, Kaoru Suda
  • Patent number: 4570565
    Abstract: Date and time information are provided in a telex and data switching system (EDS), which is connected with subscriber stations (Ttx) that are located in different time zones (ZZ1 to ZZ4). The telex and data switching system makes available a number of current date and time information items assigned to the respective individual time zones that correspond to the number of time zones to be taken into consideration. From these date and time information items there is selected, in the course of the establishing of connections, the date and time information corresponding to the subscriber stations involved in these connections, which is then made available for transmission to these subscriber stations information.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: February 18, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Murawski, Wolfgang Mayer
  • Patent number: 4528658
    Abstract: A telecommunication system, e.g. a telephone switching exchange, comprises a multiplicity of substantially identical modular units each including a microprocessor controlling the emission of departing digital messages by a transmitting section and handling arriving digital messages reaching a receiving section. Each modular unit is connected to all other units by an outgoing and an incoming two-wire line each including a signaling wire and a response wire. The signaling wire of the outgoing line of a given modular unit emits, in the presence of a departing message in a memory of the associated transmitting section, a data-ready signal to the receiving section of the modular unit for which that message is destined; the latter section, continuously scanning the signaling wires of all incoming lines, then halts its scan and sends back an acknowledgement signal on the response wire of the same line whereupon the message is sent out on the aforementioned signaling wire.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: July 9, 1985
    Assignee: Italtel-Societa Italiana Telecomunicazioni S.p.A.
    Inventor: John W. Israel
  • Patent number: 4501930
    Abstract: 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 predetermined control signal, for example a "carriage return" signal, are all of the characters of the pending row printed. The teleprinter has a display unit for displaying at least a portion of those characters of a row which have not yet been printed. The display unit may also display at least one preceding and at least one following row in addition to the row being printed.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: February 26, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventor: Roman Lutz
  • Patent number: 4497976
    Abstract: Additional information is transmitted, in conjunction with message signals which are transmitted over a data switching center belonging to a public switched network. The data switching center is connected to teleprinter subscriber stations and teletex subscriber stations which are capable of transmitting and receiving message signals in accordance with different transmission procedures. The transmission of message signals between the subscriber stations occurs over at least one signal converter connected to the data switching center. After an occupation of the signal converter proceeding from a teleprinter subscriber station, the corresponding digital information are deposited in a memory of the signal converter by the data switching center upon each attempt to establish a connection from the signal converter to a teletex subscriber station.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: February 5, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventors: Norbert Torggler, Dietmar Franz
  • Patent number: 4479195
    Abstract: A communications network having a multiport data conference system is disclosed. The data conference system includes a multilevel processor arrangement with the lower level port processors communicating directly with data terminals and higher level processors controlling conference configuration. Data to be conferenced is put in a buffer memory which is shared by all levels of processors. The ports can be configured to be compatible with different type terminals that operate at different data speeds.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: October 23, 1984
    Assignee: AT&T Bell Laboratories
    Inventors: Diane E. Herr, Reinhard Metz, Larry A. Russell
  • Patent number: 4477695
    Abstract: A microprocessor operated telecommunications interface for connection to a telecommunications line to provide transmission of data between a dedicated terminal of an automatic teletypewriter switching service of the type operating in one code and a data base of the type operating in another code is disclosed. The interface includes a microprocessing unit, a memory for operating the microprocessing unit, a random access memory, a telecommunications modem, means for formating and controlling serial a synchronous data communication and at least two user-actuatable switches for selecting a function of the interface. One function selecting switch accesses the microprocessor unit to the user terminal to provide for entry and editing of message information while a second function selecting means actuates the telecommunications to dial the data base using dialing information stored in the random access memory.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: October 16, 1984
    Assignee: Electronic Mail Corporation of America
    Inventor: Robert J. Buck
  • Patent number: 4476347
    Abstract: A method and a circuit arrangement are provided for the transmission of communication signals over switching centers of a first switching network and of a second switching network operating with different transmission procedures. The transmission is executed with the assistance of a decentralized converter in which a fixed assignment between the transmission lines of the first switching network and the virtual channels to be employed on transmission lines of the second switching center for a signal transmission is defined. Of the signals to be transmitted, only the signal portions effecting the execution of network-dependent procedure divisions are converted in the converter. The data signals appearing in accordance with the network-independent procedure divisions are combined in unaltered form with the converted signal portions.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: October 9, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rolf Hagen, Peter Weidner
  • Patent number: 4466000
    Abstract: In a data communication system comprising a plurality of data stations which are interconnected by a common communication medium, simultaneously occurring prospective users of the communication medium undergo an arbitration to determine which one will gain access to it at any time. The system according to the invention provides the arbitration without negatively affecting the capacity of the communication medium. In the system, arbitration takes place during the data communication to decide who will be the next user, arbitration and communication being effected in frequency bands which differ from each other.
    Type: Grant
    Filed: February 26, 1982
    Date of Patent: August 14, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus L. M. Jansen, Gerardus J. J. Vos
  • Patent number: 4463351
    Abstract: A line loop designed for the transmission of digitized voice samples as well as data words between an exchange and several subscriber terminals, not all of them necessarily equipped for voice communication, is connected through a modem to a bus with parallel branches extending to all the terminals, each branch including an outgoing-data lead, an incoming-data lead and two ancillary leads carrying clock pulses for the timing of data transmission and reception which are generated at the exchange. Each terminal, identified by a multibit address, is provided with an interface including a carrier sensor which detects the free or busy state of the line--during a time slot assigned to data transmission--on the basis of a certain protocol according to which an idle state is denoted by an unbroken succession of at least seven bits of predetermined logical value (here "1").
    Type: Grant
    Filed: March 11, 1982
    Date of Patent: July 31, 1984
    Assignee: Cselt Centro Studi E Laboratori Telecomunicazioni S.p.A.
    Inventor: Volmer Chiarottino
  • Patent number: 4454383
    Abstract: A method and circuitry are disclosed for asynchronously transmitting binary data over a communication pair without the use of start or stop bits. During a non-data transmitting state a quiescent differential voltage, which is intermediate to the binary data differential voltage levels, is placed on the pair. The start of a data transmission is signaled by a transition of the differential voltage from the quiescent state voltage to the binary voltage of the first data bit of the data transmission. Since all data transmissions are of known bit lengths, the end of a data transmission is determined by counting data bits.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: June 12, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Thomas H. Judd
  • Patent number: 4451697
    Abstract: A method is disclosed for establishing connections from subscriber stations or transmission lines connected to a data exchange system to signal converters. The data exchange system receives information concerning the free state or busy state of the signal converters. For this purpose, it is provided that, having forwarded the signals with which it has been previously supplied for signal conversion, the signal converter emits a special free signal which may differ from an accompanying signal indicating the end of signal transmission and which changes the busy state signal ("1") indicative of the busy state of the signal converter directly into a free state signal ("0").
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: May 29, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dietmar Franz, Norbert Torggler
  • Patent number: 4431864
    Abstract: An input-output converter permits the integration of terminals and transmit and receive equipments that operate at given logic voltage levels and character formats into communications system that operate at different logic voltage levels and character formats. The input-output converter includes a universal asynchronous receiver transmitter that converts m bit serial data into n bit parallel data in a receive mode and n bit parallel data to m bit serial data in a transmit mode while stripping and adding asynchronous start-stop bits. The input-output converter also includes logic voltage level converters that convert digital data to appropriate logic voltage levels for each function.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: February 14, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Norman J. Sturdevant, Jr.
  • Patent number: 4430525
    Abstract: A data exchange system is connected to at least one signal converter in which digital signals emitted from teletex subscriber stations are converted so that they may be processed by teletex subscriber stations, and vice-versa. In order that the load on the signal converters may be as low as possible in the event that digital signals cannot be deposited in the desired subscriber station, the data exchange system is additionally connected to at least two special teletex transmitting/receiving devices. These teletex transmitting/receiving devices can be operated by a special call signal only in the event that a teletex subscriber station or a signal converter is currently unable to deposit digital signals in the desired subscriber station. In response to such operation of the teletex transmitting/receiving devices, the latter is supplied with digital signals which cannot currently be deposited, together with additional information which enable the establishment of a connection to the desired subscriber station.
    Type: Grant
    Filed: January 8, 1982
    Date of Patent: February 7, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dietmar Franz, Norbert Torggler
  • Patent number: 4410889
    Abstract: This disclosure relates to a system and method for the synchronization of variable-length messages being transmitted between stations of a local area contention network where the messages are made up of a variable number of fixed-length packets. This system is adapted for automatic address assignment of different stations of the network so that the network may be expanded or contracted by adding stations and removing stations respectively. In this manner, a very reliable network is provided in that the failure of any particular station does not interfere with the functioning of the other stations in the network or the network itself. In addition, the system includes provision for associating various server stations with a given procedure so that a client station may be broadcast a request for a procedure and corresponding server stations will send the response to the client station containing the network identification of the server stations.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: October 18, 1983
    Assignee: Burroughs Corporation
    Inventors: David M. Bryant, Ryn C. Corbeil, Michael A. Malcolm, Donald R. Thompson
  • Patent number: 4409592
    Abstract: In a data communications systems having a communications channel (3) for interconnecting a plurality of transceivers (1) and (2), each of said transceivers (1) and (2) including means (80) for transmitting a signal having transitions, there is provided a means (20) responsive to the presence and absence of a signal on said communications channel (3) during a transition of a signal transmitted by said transmitting means (80) for providing a collision detected (CD) signal if there is destructive interference with the transmitted signal on said communication channel (3) during a transition of said transmitted signal and means (48) responsive to said CD signal for terminating said transmitting of said signal.
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: October 11, 1983
    Inventor: V. Bruce Hunt
  • Patent number: 4409593
    Abstract: In a chirped-frequency-shift-keyed data system, in which a plurality of stations each contain a data transmitter and a data receiver constantly monitoring a common system communications medium even while the companion transmitter is transmitting digital data, the CFSK signal is received during each of a successive plurality of synchronous bit time intervals with a first amplitude. The received signal is: squared and filtered in a first channel; multiplied with a locally generated signal of a second amplitude and associated with a first binary chirp condition, and then filtered, in a second channel; and multiplied with another locally generated signal of the second amplitude and associated with the remaining binary chirp condition, and then filtered, in a third channel. The channel outputs are functions of the signal amplitudes and also of the number of system transmitters simultaneously transmitting one or the other of the binary data states.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: October 11, 1983
    Assignee: General Electric Company
    Inventor: Sanjay K. Bose
  • Patent number: 4388489
    Abstract: A video conversational data communication network (30) in which subscribers (34, 35) may conduct conversational video textual data communications with one or more keystations (70, 602, 98) the network (30). Each keystation (70, 602, 98) is associated with a keystation terminal controller interface (68, 96, 600) which is in turn connected to a message switching node (32) for routing calls throughout the network (30). The keystation controller interface (68, 96, 600) locally stores (304, 306) video conversational textual data for its associated keystations (70, 82, 84, 98, 100, 602) and enables two different designated keystations to conduct two different video conversations with a common keystation in a split screen display (76). The split screen display (76) may also be used to display retrievable data from a data base (50, 52) for simultaneous display (76) along with a video conversation.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: June 14, 1983
    Assignee: Reuters Limited
    Inventors: Jack G. Wigan, David G. Ure, John M. Richards
  • Patent number: 4379946
    Abstract: A signalling system for multi-address calling and a signal control equipment therefor in which a control signal starts with a synchronize signal, followed by a function determination field indicating that the control signal is any one of a selection signal, a call accepting state indication signal and a data receiving state indication signal, the function determination field being followed by a terminal appointing field in which the signal, set in the function determination field is provided bit by bit in a predetermined order for each destination terminal. Circuit arrangements for transmitting and receiving such a control signal are provided as signal control equipments both on the side of an originating terminal and on the side of an exchange.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: April 12, 1983
    Assignee: Nippon Telegraph & Telephone Public Corporation
    Inventors: Toshiro Mizuno, Kazuo Imai
  • Patent number: 4379294
    Abstract: An arrangement for permitting communication among a plurality of stations on a single serial data communications bus. Each station is provided a choice between two modes of operation. All stations ordinarily operate in a normal mode, seeking access to the serial bus upon occurrence of a democratic time window. In the normal mode, each station is given an opportunity to issue a single transmission before any one station is permitted to issue a second transmission. Should any station require transmission of an urgent message, that station may seek access during an autocratic time window. Within any single round of bus arbitration, all autocratic time windows occur prior to the first democratic time window.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: April 5, 1983
    Assignee: Electric Power Research Institute, Inc.
    Inventors: James F. Sutherland, Donald F. Furgerson, Mladen Kezunovic
  • Patent number: 4355403
    Abstract: A teletypewriter line keyer with a switching current regulator responsive to a floating, loop current powered voltage comparator used as a loop current monitor. The line keyer, which may have positive and negative line current keying, uses a single current monitor to control positive and negative current regulators responsive to the positive and negative keying respectively. The switching regulators operate within a relatively narrow band centered around the nominal signaling current, with filtering being provided for ripple control. The circuit may also include a keying detector and open loop detector for system monitoring.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: October 19, 1982
    Assignee: Frederick Electronics Corporation
    Inventors: John W. Spaniol, Ronald E. Tollum, Julius A. Barthelme
  • Patent number: 4354261
    Abstract: A circuit arrangement for multi-address switching operations of digital encoded signals between a calling data terminal and a variety of called data terminals operating with different data transmission procedures is adapted for use with an electronic data switching system and comprises at least two interface circuits having input/output converting networks. External input terminals of these interface circuits are adapted for connection with respective input/output units of the electronic data switching system for each type of data terminal. Internal input/output terminals are connected to a storage unit for storing a multi-address message, including data information to be transmitted and identification information of the called data terminals.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: October 12, 1982
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rolf Hagen, Diethard Linck, Joerg Pappenberger
  • Patent number: 4354054
    Abstract: A status reporting arrangement for a digital transmission system (10) has a plurality of stations (11, 12, 13) in a tandem configuration. Each station (such as 11) includes a reporting circuit (30) arranged for receiving (36) a train of messages (91, 96), each message originating from a different preceding station (such as 13 and 12) in the tandem configuration, followed by a received caboose signal (97). Each reporting circuit responds in turn to the train of messages and the received caboose signal by retransmitting (60) the train of messages (91, 96) but deletes the received caboose signal (97). The reporting circuit, in response to detection of the received caboose signal, appends to the retransmitted train of messages a message (100) from the local station and a new caboose signal (102).
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: October 12, 1982
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Jules A. Bellisio
  • Patent number: 4346259
    Abstract: An interface for synchronizing the output of standard asynchronous terminals with a PABX allows all terminals to operate asynchronously with respect to each other. The output from the I/O terminal, which comprises a binary data stream in an asynchronous code, is sampled at a rate of at least three times greater than the output bit rate of the terminal. A clock signal to effect the sampling is generated within the PABX. The sampled data appears to the PABX as a bit stream synchronized with the PABX clock, allowing direct application of the sampled data to the PABX. The receiving terminal, upon reception of a start bit, waits one-half time (of its own clock) and samples the received data to reconstruct the received bits into corresponding alphanumeric characters. The frequency of the clocks internal to each terminal may vary within one percent of each other before requiring each terminal to be synchronized with each other.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: August 24, 1982
    Assignee: Anderson Jacobsen, Inc.
    Inventor: Jay Doty
  • Patent number: 4340775
    Abstract: A modular telecommunication system comprises a plurality of switching blocks connected in parallel by interconnecting lines. Each of the switching blocks includes a multiplicity of line terminators each adapted to be connected to a data terminal. In each switching block there are provided (1) a central processing system for establishing communication links associated with a respective call, (2) a communications controller for controlling local data exchange between pairs of line terminators connected thereto across real channels, (3) a virtual channel controller for controlling remote data exchange across virtual channels to different switching blocks and (4) interface units arranged between the virtual channel controller and a respective one of the interconnecting lines.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: July 20, 1982
    Assignee: Siemens Corporation
    Inventors: William Gesek, James M. Major
  • Patent number: 4340776
    Abstract: A modular telecommunication system comprises a plurality of switching blocks and a plurality of inter-connecting lines for interconnecting the switching blocks. Each of the switching blocks includes a multiplicity of line terminators each adapted to be connected to a respective data terminal. A communications controller is provided in each switching block for controlling local data exchange between pairs of line terminators connected thereto across real channels. A virtual channel controller is connected to the communications controller and controls remote data exchange across interconnecting lines via virtual channels between a locally associated data terminal and a data terminal associated with a different switching block. A central processing system is connected to the virtual channel controller and controls setting up switching operations within both the virtual channel controller and the communications controller.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: July 20, 1982
    Assignee: Siemens Corporation
    Inventors: Manfred Ganz, Enrique Gueldner
  • Patent number: 4331834
    Abstract: A modular telecommunication system comprises a plurality of switching blocks and a plurality of inter-connecting lines for interconnecting the switching blocks. Each of the switching blocks includes a multiplicity of line terminators each adapted to be connected to a respective data terminal. A communications controller is provided in each switching block for controlling local data exchange between pairs of line terminators connected thereto across real channels. A virtual channel controller is connected to the communications controller and controls remote data exchange across virtual channels to different switching blocks. Interface units are arranged between the virtual channel controller and a respective one of the inter-connecting lines for providing remote data exchange between data terminals each associated with a different switching block.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: May 25, 1982
    Assignee: Siemens Corporation
    Inventors: Manfred Ganz, Enrique Gueldner, Dieter Burgermeister
  • Patent number: 4331835
    Abstract: A modular telecommunication system comprises switching blocks interconnected by bus-oriented interconnecting lines. Each switching block includes line terminators each adapted to be connected to a respective data terminal and control means for controlling local data exchange between line terminators directly connected thereto and remote data exchange from local line terminators to a data terminal associated with a different switching block. The interconnecting lines include a plurality of individually controlled interlink buses, which are coupled to each switching block by a separate interlink-bus interface unit and a short distance transmission line. Data transfer across an interlink bus is performed under control of an interlink-bus controller associated with each bus, by scanning the interlink-bus interface units. Data characters are transmitted in time-multiplex mode together with address information of the receiving switching block for selecting the receiving interlink-bus interface unit.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: May 25, 1982
    Assignee: Siemens Corporation
    Inventors: Enrique Gueldner, James M. Major
  • Patent number: 4329541
    Abstract: A dialing system which utilizes a keypad on teleprinters retrofitted into existing teleprinter models through interfacing by voltage biasing and output circuitry with integrated circuit components having inputs to the teleprinter keypad and a pulse driver coupled to the existing dialing circuit through relays. The relays, driver and integrated circuit components are energized under different voltage levels lower than the teleprinter operating voltage through the voltage biasing circuits connected to the teleprinter power supply.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: May 11, 1982
    Inventor: Robert F. Gerber, Jr.
  • Patent number: 4327249
    Abstract: An electronic transmitter for direct current telegraphy systems. In order to limit cross-talk between neighboring telegraph lines it is known to filter telegraph signals prior to transmission to "round-off" their edges. In the present electronic transmitter telegraph signals are given approximately "sinusoidal edges" by the use of a function generator. In FIG. 1 an electronic transmitter comprises an input circuit 1, a switching circuit 2 and an output circuit 3. Binary information signals at an input produce telegraph signals on a telegraph line 6-6'. The output circuit 3 comprises two function generators 15 and 17 and a current source 21. Switches 11 and 14 in the switching circuit 2 control which function generator is operative in response to command signals D.sub.1 and D.sub.2 from the input circuit. The result is that current pulses from the current source 21 have exponentially varying leading and trailing edges which approximate the sinusoidal edges as shown in FIG. 2.
    Type: Grant
    Filed: May 16, 1980
    Date of Patent: April 27, 1982
    Assignee: U.S. Philips Corporation
    Inventor: Gerrit Rademaker
  • Patent number: 4323728
    Abstract: There is disclosed a conversion circuit arrangement for switching digital data signals between data terminals operating with different data transmission procedures. The circuit arrangement adapted for use with an electronic data switching system is composed of at least two interface circuits having input/output converting networks. External terminals of these interface circuits are connected to respective input/output means of the switching system for each type of data terminal. Internal input/output terminals of the interface circuits are connected to respective terminals of a storage unit. There is provided a control unit for controlling data transmission between the interface circuits and the storage unit and vice versa such that messages are buffered in the storage unit. The stored message is converted according to the data transmission procedure of the receiving data terminal.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: April 6, 1982
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ola Bergman, Rolf Hagen, Juergen Harenberg, Herbert Steiner
  • Patent number: RE31182
    Abstract: A packet-switched digital data communication system operable in a store-and-forward mode is provided for enabling substantially simultaneous full-duplex communication between a plurality of telecommunications terminals, facsimile transceivers or other data input sources over a communications network with a plurality of other terminals, facsimile transceivers or other data sources having access to the communications network and with which such communication is desired. The disclosed packetizing of data and transmission thereof in a store-and-forward mode with dynamic routing provides a highly efficient utilization of the transmission facilities, substantially error-free data transmission and a handshake capability between a wide variety of dissimilar and otherwise incompatible terminal devices such as facsimile transceivers having differing protocols, modulation techniques and other speed and code characteristics.
    Type: Grant
    Filed: October 11, 1979
    Date of Patent: March 15, 1983
    Assignee: International Telephone and Telegraph Corporation
    Inventors: William C. Crager, Sudhindra R. Umarji, Robert H. Griffin, Gerard J. Louit