Patents Assigned to AT&T Global Information Solutions Company
  • Patent number: 5579036
    Abstract: A bracket for shielding a capacitive touch screen from external noise arising from stray capacitance comprises upper and lower complementary rectangular conductive metal shield elements which are joined together inside a housing with a transparent touch screen retained therebetween. The upper shield element is provided with a large central aperture so that the touch screen is accessible to a user. The lower shield element is also provided with a large central aperture to enable a display, such as an LCD, to be viewed through the transparent touch screen. The display is secured to the lower shield element with an insulating member interposed between the display and the lower shield element. The shielding bracket provides a full shield for the upper, lower and edge surfaces of the touch screen to prevent the capacitance of a hand resting upon the housing from interfering with the touch screen.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: November 26, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: Joseph W. Yates, IV
  • Patent number: 5576640
    Abstract: An improved CMOS driver circuit for driving a fast, single-ended, wired-or bus architecture. The driver circuit provides a user-selectable active deassertion assist feature which assists a passive terminator circuit in quickly pulling-up a data or control bus line. The resulting driver circuit provides greater noise immunity to negative voltage transients that result from impedance mismatches caused by poor cable design configurations.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: November 19, 1996
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America, Symbios Logic Inc.
    Inventors: Raymond F. Emnett, Eugene E. Freeman, Mark J. Jander, William K. Petty, Brian G. Reise, Kevin M. Rishavy
  • Patent number: 5576932
    Abstract: A method of cooling a heat source, such as an integrated circuit device, includes the following steps (1) providing a base having a plurality of elongated fins on a first side thereof and a mating surface on a second side thereof, with the plurality of elongated fins defining a plurality of channels, (2) positioning the mating surface of the base in contact with the integrated circuit device, (3) advancing a first flow of fluid onto a top surface of each of the plurality of fins so as to form a quantity of spent fluid which continues to be advanced into the plurality of channels, and (4) advancing a second flow of fluid into the plurality of channels so as to exhaust the quantity of spent fluid from the plurality of channels. An apparatus for cooling a heat source is also disclosed.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: November 19, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventors: Eugene H. Bishop, James A. Liburdy, Richard S. Figliola, Gregory A. Failla
  • Patent number: 5576224
    Abstract: A method and structure for sensing data such as temperature with respect to objects such as silicon wafers undergoing fabrication or other processes involve the use of a monitor element of material and configuration similar to that of the objects being processed. A structure such as a closed loop or segment of a spiral may be formed on the surface of the monitor element, and acts as a secondary coil when brought into operative relation with a transformer structure which includes a primary coil, a current source and a sensing device. The sensing device senses variations in the electrical characteristics in the primary coil, caused by the presence of the monitor element, and can thereby determine the temperature or other desired data relating to the monitor element, which is substantially the same as comparable data for the objects being processed.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: November 19, 1996
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America, Symbios Logic Inc.
    Inventors: James P. Yakura, Richard K. Cole, Matthew S. Von Thun, Crystal J. Hass, Derryl D. J. Allman
  • Patent number: 5575100
    Abstract: An electronic shelf label protective cover whose size is independent of the size of an electronic display module for displaying price information, and whose size is sufficient to contain a display tag containing information other than price.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: November 19, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventors: Russel H. Marvin, Donald W. Carr
  • Patent number: 5577213
    Abstract: A method and apparatus for producing an electronic circuit which allows a device to be connected to a bus, such as a system bus in a computer. The invention accepts user specified parameters for configuring a device adapter which interfaces the device to the bus, and thereafter generates a customized device adapter based on such user specified parameters. By using a common design macro, which is programmable, a user can easily specify and generate custom device adapters for a plurality of dissimilar devices to be connected to the bus. A resulting adapter architecture allows for multiple, dissimilar devices to interface to a computer bus with a single device adapter integrated circuit or card.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: November 19, 1996
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America, Symbios Logic Inc.
    Inventors: James M. Avery, William D. Isenberg
  • Patent number: 5574851
    Abstract: An architecture for on-line reconfiguration on a RAID level 0, 1, 2, 3, 4 or 5 disk array. This architecture allows the computer system to perform reconfiguration of the disk array transparently, with disk I/O operations being performed concurrently with reconfiguration operations. The reconfiguration process allocates computer system resources necessary to support both the old and new array configurations during the reconfiguration process. Logical areas within the array are sequentially reconfigured from the old configuration to the new configuration. Data in each logical area is read from the area undergoing reconfiguration and thereafter overwritten in accordance with the new array configuration. System I/O requests received during reconfiguration which are directed to unreconfigured areas in the disk array are executed in accordance with the old array configuration.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 12, 1996
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America, Symbios Logic Inc.
    Inventor: Dale F. Rathunde
  • Patent number: 5574262
    Abstract: Cancellation of electrostatic noise in digitizing tablet having a shield supplying a signal proportional to the electrostatic noise which is subtracted from the information signal derived from a digitizing grid. A conductive transparent shield is interposed between a digitizing grid and image source so that the same electro-static noise on both. The shield may be grounded on zero to n-1 edges, n being the number of edges of the shield. An electrical signal is taken from an ungrounded side and supplied as an input signal to a difference amplifier, the other input signal being the information signal from the digitizing grid. The output signal from the amplifier is the information signal with the noise signal component cancelled.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: November 12, 1996
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America, Symbios Logic Inc.
    Inventor: William K. Petty
  • Patent number: 5574627
    Abstract: Resistive ink elements are applied to the exposed surfaces of thin sections or thermal insulation provided to cooled integrated circuit devices within a computer system. The insulation is made thinner than required to prevent the formation of condensation upon the exposed surfaces of the insulation in order to accommodate space limitations within the computer system. The resistive ink elements generate heat upon the application of an electrical current thereto to warm the exposed surfaces of the insulation to a temperature above the dew point of the ambient environment within the computer system, thereby preventing the formation of condensation on the surfaces on the insulation.
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: November 12, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: Warren W. Porter
  • Patent number: 5572141
    Abstract: A memory metal hot plug connector apparatus and method which provide a physical lock that prevents removal of a circuit card from a system board until power and system functional signals have been electrically disconnected. The memory metal in the connector releases the physical lock when heated. A power supply interface controller issues commands to connect and disconnect power to the circuit card and to heaters associated with the memory metal connectors. A test signal circuit provides JTAG standard signals for connecting and disconnecting system functional signals. Methods for connecting and disconnecting the circuit card are also disclosed.
    Type: Grant
    Filed: March 9, 1994
    Date of Patent: November 5, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: Edward W. Hutton
  • Patent number: 5568629
    Abstract: A method for partitioning a disk array into logical storage units distinct from the physical storage units within the array. A set of individual drives within the array are partitioned into multiple partitions. Corresponding partitions from the individual drives are grouped together to form a logical unit which is addressed as, and functions as, an independent disk array. The partitions within the logical unit are addressed as, and function as, disk drives within the logical array. Thus, a single set of disk drives may be divided into two or more logical storage units, each functioning as an independent disk array, and each employing a different RAID level scheme for storing data. Alternatively, multiple sets of disk drives within the array can combined together into a logical storage unit which functions as a single set of drives. Corresponding drives from each set of drives are addressed as a single disk drive within the logical unit.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: October 22, 1996
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America, Symbios Logic
    Inventors: Timothy W. Gentry, Gerald J. Fredin, Daniel A. Riedl
  • Patent number: 5568304
    Abstract: An optical receiver for modulated light includes an optical antenna (12) having fluorescent material (18) dispersed therein, and an optoelectrical demodulator (14) for demodulating the modulated light. The optical antenna (12) is formed of a filter material which is transparent to wavelengths equal to or longer than a predetermined wavelength and absorptive to wavelengths shorter than the predetermined wavelength. Also, the optical antenna (12) has a coating (20) of a filter material which is transparent to wavelengths equal to or shorter than the predetermined wavelength, and reflective to wavelengths longer than the predetermined wavelength. Thus, the optical antenna (12) acts on a narrow-pass band filter. Since the fluorescent material emits light at a longer wavelength than the received light, the emitted light is reflected internally to impact on the optoelectrical demodulator (14).
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 22, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: Peter F. Baur
  • Patent number: 5568177
    Abstract: Thermal transfer printing ribbon for printing security bar code symbols wherein the thermal transfer printing ribbon has been overprinted or overcoated in specific predetermined locations with a coating which has magnetic recognition characteristics. The difference in printed bar code symbols is invisible to the human eye and bar-code scanning equipment, but can be readily detected using a device capable of recognizing a magnetic signal.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: October 22, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventors: Shashi G. Talvalkar, Marion E. McCreight
  • Patent number: 5566049
    Abstract: A system for vertically mounting 3.5-inch disk drives includes a main disk support bracket, first and second disk retainers, and a center disk support bracket. The system allows independent suspension mounting in any orientation of one, two, three or four disk drives which are isolated from mechanical stresses, vibration and shock.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: October 15, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: Dung J. Nguyen
  • Patent number: 5563782
    Abstract: An AC-DC voltage conversion integrate circuit that integrates all the control and protection circuits, as well as the power transistors, into a single module. Passive components, such as the transformer and capacitors, are very small, as the switching frequency is in the KHz or MHz range. Including one or more integrated switched mode power supply ICs in every wall outlet allows for providing a plurality of DC voltages from such outlets.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: October 8, 1996
    Assignees: AT&T Global Information Solutions Company, Hyundai Electronics America, Symbios Logic Inc.
    Inventors: Dao-Long Chen, Daniel L. Ellsworth
  • Patent number: 5563393
    Abstract: A business system including at least one transaction terminal such as an automated teller machine ATM (10) and an interface device (12) for use by an operator in carrying out maintenance of the ATM (10) or replenishing consumable items used during its operation. The interface device (12) is separate from the ATM (10) and two-way communication between the interface device (12) and the ATM (10) is arranged to take place in a contactless manner. Preferably communication is enabled by the use of a radio frequency technique. The interface device (12) provides the operator with a sequence of instructions and is arranged to await the receipt of a confirmation signal from the ATM (10) prior to displaying the next instruction in the sequence. The ATM (10) provides the confirmation signal only when a sensor (22-44) within the ATM (10) detects that the previously displayed instruction has been carried out by the operator.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: October 8, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: Michael G. Coutts
  • Patent number: 5563768
    Abstract: A method of cooling a heat source includes the steps of (1) positioning a thermally conductive base in contact with the heat source, the base having a plurality of fins which define a plurality of channels, (2) generating an initial flow of fluid, (3) positioning a baffle in the path of the initial flow of fluid so as to create a primary flow of fluid and a secondary flow of fluid, (4) directing the primary flow of fluid against the plurality of fins so as to form a quantity of spent fluid which is advanced into the channels, (5) directing the secondary flow of fluid into the plurality of channels so as to force the quantity of spent fluid out of the plurality of channels, and (6) repositioning the baffle from a first position to a second position to change the magnitude of the primary flow of fluid. An apparatus for cooling a heat source which splits an initial flow of fluid into a primary flow of fluid and a secondary flow of fluid is also disclosed.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: October 8, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: David W. Perdue
  • Patent number: 5563633
    Abstract: The present invention discloses a method and apparatus for performing data compression during monitor refresh operations. In one embodiment, it is envisioned that the compression functions would be performed in a refresh compaction device and the de-compression functions would be performed in a RAMDAC, thereby requiring only the transfer of compressed data between the refresh compaction device and the RAMDAC. In an alternative embodiment, it is envisioned that both the compression and de-compression functions would be performed in the refresh compaction device. Regardless of implementation, a "critical fill" level is determined during compression and a "critical fill" interrupt is generated during de-compression to gain control of the frame buffer before the compressed digital data is fully depleted.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: October 8, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventor: Donald H. Parsons
  • Patent number: D374439
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: October 8, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventors: Robert W. Paterson, Graham P. Marshall, John P. Caldwell, Scott M. Belliveau
  • Patent number: D375085
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: October 29, 1996
    Assignee: AT&T Global Information Solutions Company
    Inventors: Kevin P. Kellar, Horng-Jaan Lin