Patents Represented by Attorney Steven C. Stewart
  • Patent number: 5648745
    Abstract: A method and system for distributing multimedia signals to a subscriber from a headend unit. The multimedia signals are transmitted on a network media as an RF signal. The RF signal is fed to an input terminal of a tap which has an RF circuit that splits the RF signal and distributes to an output terminal. The RF circuit splits the RF signals, and feeds the split signal to a plurality of connectors on the tap's front panel. The RF signals on the output terminal are fed downstream to a plurality of subscribers. A plate is placed in the tap such that when the RF circuit is removed for repair, maintenance or service, an electrical connection is maintained between the input and output terminal to prevent a disconnection of service downstream.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: July 15, 1997
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Bart Fredrick Spriester, James Lawrence Dale
  • Patent number: 5581801
    Abstract: A method and system for distributing multimedia signals to a subscriber from a headend unit. The multimedia signals are transmitted on a network media as a composite RF and AC signal. A passive unit is upgraded by with a circuit having connectors that separates the AC from the RF signal. The signals are split in the upgraded passive unit. The AC signal is fed to a power distribution unit which generates an AC output signal that is surge protected, RF filtered and current limited. The RF signal and AC output signal are separately fed to a customer interface unit where the RF signal is decoded and transmitted to a subscriber. By providing a passive unit where the AC and RF signal are separated in the same unit, the system can be upgraded with a power distribution unit when AC signals are required to supply power to subscriber equipment.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: December 3, 1996
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Bart Spriester, Gregory L. Herrmann, Robert S. Collmus, James L. Dale
  • Patent number: 5559870
    Abstract: A method and apparatus for providing information, such as power consumption, to a subscriber over an electronic network in response to commands provided by the subscriber. The apparatus includes a remote unit which detects and stores the power consumption information, a subscriber device, i.e., a telephone, for generating request commands and a control device which tracks the information. The subscriber using the subscriber device, feeds the request commands via the network to the control device. The control device responds to the commands by directing the remote unit to feed its stored power consumption information onto the network to the control device. The control device then processes the information and indicates the result back to the subscriber.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: September 24, 1996
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Mark W. Patton, Douglas W. Todd, Glenn A. Davis
  • Patent number: 5550825
    Abstract: A headend method and apparatus for a digital transmission system is provided which includes inputs for receiving first and second program information from first and second program sources and inputs for receiving first and second control information from first and second control sources. The first and second program information is applied to a switching circuit and a switch control controls the switching circuit to output channels of program information comprising combinations of the first and second program information for output to a subscriber. Processing circuitry allows for selectively providing the first and second control information to the channels output from the switching circuit.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: August 27, 1996
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Jay C. McMullan, Jr., David B. Burleson, Donald R. Huntley, Randolph J. Schaubs
  • Patent number: 5483208
    Abstract: An RF Choke and tap having improved insertion loss, amplitude modulated distortion of video and audio carrier signals at CATV frequencies. The RF choke includes a 20 AWG magnetic wire wound on a ferrite rod. The magnetic field effects of the choke are optimized by selecting the choke winding pattern, rod core material and positioning of a resistor between selected windings. The wire is wound by placing two groups of the 4 tightly wound wires adjacent the ends of the rod. A group of 3 very loosely wound wires is separated from the wound wires and placed between the groups of 4 tightly wound wires. A resistor is electrically connected to a first wire in one of the groups of tightly wound wires and connected to a first wire in the group of the loosely wound wires.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: January 9, 1996
    Assignee: Scientific-Atlanta, Inc.
    Inventor: Bart F. Spriester
  • Patent number: 5456431
    Abstract: An apparatus for supporting trash bags that prevents the trash bag from contacting the ground during transport. The apparatus includes a main vertically oriented member having a carrying assembly at its top end and a wheeled supporting base assembly at its bottom end. The carrying assembly holds and maintains the open end of the trash bag. The base assembly includes a horizontally oriented plate that is vertically aligned with the carrying assembly to prevent the closed end of the bag from contacting the ground.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: October 10, 1995
    Inventor: Allen M. Ilnisky
  • Patent number: 5436749
    Abstract: A predistortion circuit for an optical communications system includes a main path for an RF modulating signal and a predistortion path for a predistortion signal, which signals are combined to modulate a laser diode. The distortion path includes a distortion generator which generates a distortion signal which is substantially the same as the distortion generated by the modulation of the transmission system with the RF modulating signals. In one implementation, the distortion generator comprises a square law device which preferably is a field effect type device. The square law device operational characteristic closely mimics the major component of distortion in optical communications systems, composite second order (CSO) distortion. In a second implementation, two square law devices are coupled in an anti-phase arrangement to substantially cancel odd order distortion components from the distortion signal and to enhance even order distortion components, particularly CSO.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: July 25, 1995
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Rezin E. Pidgeon, Jr., Heather H. Rand
  • Patent number: 5421900
    Abstract: A self contained battery operated spray unit is provided for cleaning air-conditioning coils and other devices to be cleaned. The spray unit includes a solution tank and a rinse tank which are selected to be sprayed with a three way valve. Fluid from one of the tanks is pumped with a battery operated DC pump into a surge tank and out a spray wand when activated. The surge tank acts as a reservoir of pressure so that the pump does not have to continually cycle when in use, thereby increasing battery life. The pressure out of the wand is set to clean the conditioning coils without damaging them through excess pressure.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: June 6, 1995
    Inventor: William H. Clontz
  • Patent number: 5409479
    Abstract: The method and apparatus of the invention use a beam of laser emitted optical energy to effect wound closure and reconstruction of biological tissue. In response to input as to tissue type and thickness, a computer determines the output power, exposure time and spot diameter of the emitted beam to control the application of optical energy to produce thermal heating of biological tissue. The tissue is heated to a degree suitable for denaturing the tissue proteins such that the collagenous elements of the tissue form a "biological glue" to seal immediately and/or to reconstruct the tissue being heated without any injurious tissue shrinkage. In a given embodiment, the computer directly controls output power of the laser by regulating the laser's input current, and limits exposure time by deactivating a shutter mechanism when the predetermined time is reached.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: April 25, 1995
    Assignee: Premier Laser Systems, Inc.
    Inventors: Douglas K. Dew, Long S. Hsu, Steven J. Halpern
  • Patent number: 5406558
    Abstract: An apparatus and method is described for transmitting, receiving and communicating program data signals which are combined with digital data signals. Preferably, the present invention compresses 30 digital audio signals, multiplexes them with title, track, artist, record label, year, etc., program information, and transmits the combined signals via satellite to a receiving station. The receiving station demultiplexes the signals and sends them via a cable distribution system to a subscriber's digital music tuner. This tuner further demultiplexes and decodes the signals so that the digital audio signals may be converted to analog and output for listening, while the corresponding data signals are communicated to the subscriber. In an alternative preferred embodiment, the program data signals are transmitted to a remote control receiver where they are displayed. The system described in the present invention may be used for transmitting video, software or games with program data to subscribers.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: April 11, 1995
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Luis A. Rovira, William E. Wall, Jr.
  • Patent number: 5396934
    Abstract: A method and apparatus for injecting CO.sub.2 gas into a bottled liquid to carbonate or maintain carbonation in the liquid. A valved coupling having a conduit extending there through is screwably attached to a P.E.T. bottle substantially filled with liquid. The valve is depressed .while the bottle is squeezed to remove any excess air in the bottle. Regulated CO.sub.2 gas is then fed through a connector that is attached to the coupling to carbonate the liquid. Once carbonated, the connector is removed while the coupling remains in place to maintain carbonation.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: March 14, 1995
    Inventor: Thomas S. Moench
  • Patent number: 5385495
    Abstract: A water ski fin extends through the rear of a water ski. Pivotally connected to a lower portion of the fin is a wing extending substantially perpendicularly from the fin. A device is connected to the wing that allows the wing to pivot and change its angle of attack as a function of the speed of the fin through the water.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: January 31, 1995
    Inventor: John A. Henns
  • Patent number: 5378092
    Abstract: An apparatus and method for cutting a hole in a liner installed in a conduit. Included in the apparatus is a carriage and a cutting head that are rotated to cut the liner. A lateral axis extends through the carriage. A skid constrains the carriage and the cutting head. The cutting head is substantially positioned over the center of gravity of the carriage to provide stability during cutting. The cutting head moves vertically with the use of a cam. The cutter also moves laterally and may rotate about the axis when cutting the hole. Prior to cutting the hole, the skid extends outward to hold the carriage in place. The apparatus also includes a specialized cutter having cutting bars along its outside perimeter and along its top surface.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: January 3, 1995
    Inventor: Ward J. Griner
  • Patent number: D354959
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: January 31, 1995
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Jeffrey A. Madill, Jeffrey R. Huppertz, Vibha Rustagi, William J. Saunders, James B. Watson
  • Patent number: D358295
    Type: Grant
    Filed: September 16, 1993
    Date of Patent: May 16, 1995
    Inventor: Thomas S. Moench
  • Patent number: D372274
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: July 30, 1996
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Alsup J. Douglas, William J. Saunders
  • Patent number: D373588
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: September 10, 1996
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Donald H. Bowen, Jr., David I. Chang, Bryce G. Rutter, Michael D. Prstojevich, Robert T. Van Orden, Charles K. Fincher
  • Patent number: D376366
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: December 10, 1996
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Douglas M. Patton, Brandt L. Thompson
  • Patent number: D378093
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: February 18, 1997
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Bryce G. Rutter, Michael D. Prstojevich
  • Patent number: D385253
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: October 21, 1997
    Assignee: Scientific-Atlanta, Inc.
    Inventors: Bart Spriester, Robert S. Collmus, Gregory L. Herrmann, Ronald J. Hanson