Patents by Inventor Thomas Stewart

Thomas Stewart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080245217
    Abstract: An improved electromagnetic transducer for use in electric instrument pickups is described. The magnetic circuit of the transducer is almost entirely enclosed, leading to a very efficient and quiet design. A magnetically susceptible transducer core (1) is shaped in such a way that it provides a closed path for magnetic flux everywhere except a gap (3) through which one or more ferromagnetic strings (4) pass. One or more electrically conductive coils (2) disposed on core (1) convert the magnetic flux passing through the core into electric current. A lengthwise magnetic field is applied to the string using a specially shaped magnetic element, consisting of either a permanent magnet (5) or magnetically susceptible magnetizing core (6) about which one or more coils (7) are disposed. In either case, the magnet element is shaped in such a way as to contain magnetic flux within itself everywhere except a section wherein the magnetic flux is driven longitudinally through one or more magnetically susceptible strings.
    Type: Application
    Filed: April 7, 2007
    Publication date: October 9, 2008
    Inventor: Bret Thomas Stewart
  • Publication number: 20080245218
    Abstract: This invention relates generally to electromagnetic transducers, and more specifically, to devices that convert the mechanical vibrations of a magnetically permeable object, such as a ferromagnetic instrument string, into an electrical signal using electromagnetism.
    Type: Application
    Filed: July 25, 2007
    Publication date: October 9, 2008
    Inventor: Bret Thomas Stewart
  • Publication number: 20070146012
    Abstract: Reconfigurable electronic structures and circuits using programmable, non-volatile memory elements. The programmable, non-volatile memory elements may perform the functions of storage and/or a switch to produce components such as crossbars, multiplexers, look-up tables (LUTs) and other logic circuits used in programmable logic structures (e.g., (FPGAs)). The programmable, non-volatile memory elements comprise one or more structures based on Phase Change Memory, Programmable Metallization, Carbon Nano-Electromechanical (CNT-NEM), or Metal Nano-Electromechanical device technologies.
    Type: Application
    Filed: November 3, 2005
    Publication date: June 28, 2007
    Inventors: Colin Murphy, Narbeh Derhacobian, Louis Kordus, Antonietta Oliva, Vei-Han Chan, Thomas Stewart
  • Publication number: 20070119985
    Abstract: A fluid entrainment apparatus is provided which operates to mix a first fluid stream with a second fluid stream. The apparatus includes first and second fluid flow conduits. The first fluid flow conduit includes a nozzle portion having a converging bore through which the first fluid is accelerated. Additionally, the second fluid flow conduit includes a nozzle portion having a converging bore, a duct portion having a generally cylindrical bore, and a diffuser portion having a diverging bore. The nozzle portion of the second fluid flow conduit is mounted with respect to the nozzle portion of the first fluid flow conduit such that an annular port is formed through which the second fluid passes to mix with the first fluid. Additional fluid mixing occurs in the duct portion and the diffuser portion. The fluid entrainment apparatus may be configured for use within a vehicle exhaust system.
    Type: Application
    Filed: September 6, 2006
    Publication date: May 31, 2007
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Raj Ranganathan, Brent Deep, Bala Murthy, Thomas Stewart, Anthony Grzelakowski
  • Publication number: 20070111202
    Abstract: An electrochemical detection system which specifically detects selected nucleic acid segments is described. The system utilizes biological probes such as nucleic acid or peptide nucleic acid probes which are complementary to and specifically hybridize with selected nucleic acid segments in order to generate a measurable current when an amperometric potential is applied. The electrochemical signal can be quantified.
    Type: Application
    Filed: January 3, 2007
    Publication date: May 17, 2007
    Applicant: ANDCARE, INC.
    Inventors: Robert Henkens, John O'Daly, Marek Wojciechowski, Honghua Zhang, Najih Naser, R. Roe, Thomas Stewart, Deborah Thompson, Rebecca Sundseth, Steven Wegner
  • Publication number: 20070099405
    Abstract: Phase change devices, and particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. This structure allows an application in which an electrical connection can be created between the two active terminals, with the control of the connection being effected using a separate terminal or terminals. Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals. This allows the use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device.
    Type: Application
    Filed: November 3, 2005
    Publication date: May 3, 2007
    Inventors: Antonietta Oliva, Louis Kordus, Narbeh Derhacobian, Vei-Han Chan, Thomas Stewart
  • Patent number: 7194183
    Abstract: A modular receptacle assembly includes integral optical indication. The receptacle assembly includes a module housing one or more receptacles configured to releasably receive, in an insertion direction, a leading portion of a modular plug. A light pipe having proximal and distal ends, is disposed in the footprint of the module. The proximal end is coupled to the receptacle, and the distal end is coupled to a light source. The proximal end is configured to radiate light onto the leading portion of a plug disposed within said receptacle. An actuator is configured to selectively operate the light pipe.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: March 20, 2007
    Assignee: Enterasys Networks, Inc.
    Inventors: Martin Q. Thornton, Richard W. Graham, Thomas A. Stewart, William M. Ferland
  • Patent number: 7137743
    Abstract: A plug assembly is provided with integral optical indication. The plug assembly includes a housing having a leading portion and a trailing portion. The leading portion is configured for information exchanging engagement with an internally illuminated receptacle sized and shaped to releasably receive said leading portion therein. The receptacle is configured to radiate light onto the leading portion of the plug. This leading portion includes a light collector configured to receive the light, which is then conveyed via an optical coupling to an optical indicator located on the trailing portion of the plug assembly. The indicator has optical properties distinct from those of said trailing portion to facilitate viewing.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: November 21, 2006
    Assignee: Enterasys Networks, Inc.
    Inventors: Richard W. Graham, Martin Q. Thornton, Thomas A. Stewart, William M. Ferland
  • Publication number: 20060239523
    Abstract: The present invention is an anatomy display method for radiographically obtained data. The anatomy display method comprises obtaining an anatomy dataset comprised of pixels, each of the pixels having a luminance, and the pixels being arranged in slices. A portion of the anatomy dataset is selected. A representative slice of the portion of the anatomy dataset is used to establish a threshold pixel luminance within the entire selected portion of the anatomical dataset. All pixels in the selected portion of the anatomy dataset below the threshold are set to zero luminance. A selected organ in the selected portion is isolated by volumetric analysis. A volumetric matrix of the pixels corresponding to the selected organ is saved. The matrix may be further manipulated for examination by rotating it, tracking it, rendering it transparent and enlarging subvolumes.
    Type: Application
    Filed: April 5, 2005
    Publication date: October 26, 2006
    Applicant: Bradley University
    Inventors: Thomas Stewart, Deepak Gaddipati
  • Publication number: 20060153549
    Abstract: The present invention is directed to a fluid warming container (a.k.a., cassette) having an integrated heating element attached to the container, not the warming device as conventionally done. The heating element provides thermal energy to the fluid contained in the container. The fluid contained in the container is designed to be injected and/or delivered, eventually and normally immediately, into a patient.
    Type: Application
    Filed: January 11, 2005
    Publication date: July 13, 2006
    Inventors: Karl Cazzini, Thomas Stewart
  • Publication number: 20060150792
    Abstract: The present invention is directed to a fluid warming container (a.k.a., cassette) having an integrated heating element attached to the container, not the warming device as conventionally done. The heating element provides thermal energy to the fluid contained in the container. The fluid contained in the container is designed to be injected and/or delivered, eventually and normally immediately, into a patient.
    Type: Application
    Filed: December 7, 2005
    Publication date: July 13, 2006
    Inventors: Karl Cazzini, Thomas Stewart
  • Publication number: 20060079611
    Abstract: Beneficial stabilizer compositions are employed to stabilize halogen-containing vinyl polymers from, for example, degradation and discoloration. The stabilizer compositions comprise a substantially metal-free perchlorate; a first amine-containing stabilizer; and a second amine-containing stabilizer; wherein the first and second amine-containing stabilizers are selected from an aminoalcohol, a dihydropyridine, an aminocrotonate, an aminouracil, a phenyl indole, or a mixture comprising one or more of the foregoing amine-containing stabilizers; and wherein the first and second amine-containing stabilizers are different types of stabilizers.
    Type: Application
    Filed: October 3, 2005
    Publication date: April 13, 2006
    Inventors: Steven Austen, Gary Conroy, Thomas Stewart
  • Publication number: 20050266723
    Abstract: A plug assembly is provided with integral optical indication. The plug assembly includes a housing having a leading portion and a trailing portion. The leading portion is configured for information exchanging engagement with an internally illuminated receptacle sized and shaped to releasably receive said leading portion therein. The receptacle is configured to radiate light onto the leading portion of the plug. This leading portion includes a light collector configured to receive the light, which is then conveyed via an optical coupling to an optical indicator located on the trailing portion of the plug assembly. The indicator has optical properties distinct from those of said trailing portion to facilitate viewing.
    Type: Application
    Filed: June 1, 2004
    Publication date: December 1, 2005
    Applicant: Enterasys Networks, Inc.
    Inventors: Richard Graham, Martin Thornton, Thomas Stewart, William Ferland
  • Patent number: 6931352
    Abstract: A system and method for monitoring the effectiveness of a heat exchange unit, which comprises at least one or more sensors for taking a plurality of temperature readings of a heated fluid, a coolant and fluids passing through the heat exchange unit. The temperature readings are transmitted and/or entered into a processor capable of comparing the temperature readings and calculating a measure of effectiveness of the heat exchange unit. The processor is in communication with a database that maintains at least one predetermined parameter limit associated with the effectiveness of the heat exchange unit. The processor analyzes the data and is also capable of generating a signal indicative of the health or condition of the heat exchange unit.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: August 16, 2005
    Inventors: Robert Douglas Cryer, Charles Joseph Waugaman, Lance Thomas Stewart, Dario Patrico Escobar, Manoj P. Kumar, Laurence Richard Handler, Cecil M. Daniel
  • Patent number: 6876957
    Abstract: The present invention is a transient vibration time history testing calibration system and method that assists testing equipment reproduce predefined earthquake synthesized waveforms within acceptable parameters. Adjustments are made to forces applied to the equipment under test (EUT) so that the acceleration of the EUT corresponds to a predetermined acceleration time history waveform. Information associated with the acceleration time history waveform is loaded in a controller which produces shaker drive signals that control movements of a shaker. Two waveform tests are run at an attenuated value (e.g., ?3 dB) of a full level test on a dummy load. The acceleration of the dummy load is measured and adjustments are made to update the drive signals if the TRS is not within acceptable tolerances of the RRS. The adjustments are projected to provide shaker drive signals that shake the EUT within acceptable ranges of a RRS.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: April 5, 2005
    Assignee: Cisco Technology, Inc.
    Inventor: Thomas Stewart
  • Publication number: 20050063647
    Abstract: A modular receptacle assembly includes integral optical indication. The receptacle assembly includes a module housing one or more receptacles configured to releasably receive, in an insertion direction, a leading portion of a modular plug. A light pipe having proximal and distal ends, is disposed in the footprint of the module. The proximal end is coupled to the receptacle, and the distal end is coupled to a light source. The proximal end is configured to radiate light onto the leading portion of a plug disposed within said receptacle. An actuator is configured to selectively operate the light pipe.
    Type: Application
    Filed: December 17, 2003
    Publication date: March 24, 2005
    Inventors: Martin Thornton, Richard Graham, Thomas Stewart, William Ferland
  • Patent number: 6867709
    Abstract: A vehicle detector and classifier comprises a plurality of electrically conductive loops 1 arranged substantially in a plane perpendicular to a road surface, for detecting vehicle wheels. The loops can be arranged in a transverse, vertical slot 2 and housed in a flexible enclosure. An electronic circuit 3, including an oscillator, can be positioned adjacent each loop 1 in the slot 2 to energize and monitor the loop. The detector preferably also includes a conventional loop arranged substantially in the plane of the road surface, for detecting vehicle bodies, and means for superposing the results obtained from the conventional and vertical loops to aid in classifying detected vehicles.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: March 15, 2005
    Assignee: Golden River Traffic Limited
    Inventors: Gordon Johnston Robertson Povey, Thomas Stewart McKenzie MacLean
  • Publication number: 20030075314
    Abstract: A system and method for monitoring the effectiveness of a heat exchange unit, which comprises at least one or more sensors for taking a plurality of temperature readings of a heated fluid, a coolant and fluids passing through the heat exchange unit. The temperature readings are transmitted and/or entered into a processor capable of comparing the temperature readings and calculating a measure of effectiveness of the heat exchange unit. The processor is in communication with a database that maintains at least one predetermined parameter limit associated with the effectiveness of the heat exchange unit. The processor analyzes the data and is also capable of generating a signal indicative of the health or condition of the heat exchange unit.
    Type: Application
    Filed: October 17, 2002
    Publication date: April 24, 2003
    Inventors: Robert Douglas Cryer, Charles Joseph Waugaman, Lance Thomas Stewart, Dario Patrico Escobar, Manoj P. Kumar, Laurence Richard Handler, Cecil M. Daniel
  • Patent number: 6324864
    Abstract: A chiller arrangement (10) for liquid beverages including a pitcher shaped serving receptacle member (20) having a receptacle base (22) provided with an internally threaded collar (27) adapted to engage the closed lower end (31) of a tubular insert member (30) containing a freezable gel (38). The upper end (31) of the tubular insert member (30) is sealingly engaged by a closure element (35) and covered by a cap member (40) bearing an advertising panel member (50) which can be employed to both advertise and identify the brand name of the liquid beverage contained within the serving receptacle member (20).
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: December 4, 2001
    Inventors: Thomas Stewart, Diana Stewart
  • Patent number: 6218350
    Abstract: There is provided a bleaching enzyme capable of generating a bleaching chemical and having a high binding affinity for stains present on fabrics. Furthermore, there is provided an enzymatic bleaching composition comprising the bleaching enzyme and a surfactant and a process for bleaching stains present of fabrics.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: April 17, 2001
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Thomas Stewart Beggs, Mark John Berry, Paul James Davis, Leon Gerardus J. Frenken, Cornelis Theodorus Verrips