Patents by Inventor William A. Armstrong

William A. Armstrong 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).

  • Patent number: 5574847
    Abstract: Front end processors in a graphics architecture execute parallel scan conversion and shading to process individually assigned primitive objects for providing update pixels. A crossbar along with groups of first-in-first-out registers (FIFOs) accommodates data flow to parallel pixel processors with associated memory capabilities (frame buffer banks) where visibility and blending operations are performed on predetermined sequences of update pixels to provide frame buffer pixels and ultimately display pixels. The pixel processors identify with sequences of pixels in the display in patterns designed to equalize processor loads for pixels located along scan lines of a raster, or distributed over an area. Update pixel data is tagged to identify FIFO groups (pixel processors) individual FIFO selection and output sequence. Temporal priority is accomplished so that primitive data is entered in the frame buffer banks (components) restored to the same order as generated at the central processor (CPU) level.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: November 12, 1996
    Assignee: Evans & Sutherland Computer Corporation
    Inventors: Glen A. Eckart, William Armstrong
  • Patent number: 5504052
    Abstract: A silver catalyst for ethylene oxidation to ethylene oxide is prepared by impregnating an inert support with a silver/amine solution and calcining the impregnated support at 300.degree.-5000.degree. C., the catalyst being maintained under an inert atmosphere at temperatures of 250.degree. C. or higher, preferably at 100.degree. C. or higher.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: April 2, 1996
    Assignee: Scientific Design Company, Inc.
    Inventors: Nabil Rizkalla, William Armstrong
  • Patent number: 4391668
    Abstract: The invention disclosed is a novel method for the preparation of a nickel/cobalt oxide impregnated nickel plaque material involving a single oxidation step. The nickel plaque material is cleaned, impregnated with an aqueous cobalt nitrate solution and dried. The nickel/cobalt oxide is then formed in a single oxidation step.
    Type: Grant
    Filed: April 22, 1981
    Date of Patent: July 5, 1983
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventor: William A. Armstrong
  • Patent number: 4368852
    Abstract: Electrostatic spray guns are connected in series to a pressurized source of liquid spray material. Each gun has an attached pressure regulator for evening the pressure of liquid supplied to the gun and the consequent spray pattern emitted from the gun. Each regulator is so constructed that it minimizes the pressure drop of liquid passing through the regulator to the next series connected regulator. Additionally, each regulator is made primarily from a low capacitance plastic material so that it cannot store and discharge an electrical potential sufficient to create a dangerous condition in a spray environment. Each regulator is so constructed that it may be manually adjusted to vary the pressure of liquid supplied from the regulator to the attached gun or may be easily converted to pneumatic control.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: January 18, 1983
    Assignee: Nordson Corporation
    Inventors: William J. Sharp, Harold D. Beam, William A. Armstrong
  • Patent number: 4226920
    Abstract: The invention disclosed relates to an anode structure for use in dry cells, particularly in low temperature environments. The novel anode is constructed of a perforated electrochemically active material and wound to form a coil. Spacer means is provided to maintain substantially uniform spacing between adjacent layers of the coil.
    Type: Grant
    Filed: June 22, 1979
    Date of Patent: October 7, 1980
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventor: William A. Armstrong
  • Patent number: 4221846
    Abstract: The invention disclosed relates to a novel paper composition for use as a separator material in electrical batteries. The paper composition 30-50%/w of glass fibers and 70-59%/w of a co-polymer of vinyl chloride and vinyl acetate.
    Type: Grant
    Filed: February 2, 1979
    Date of Patent: September 9, 1980
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventors: William A. Armstrong, James A. Wheat
  • Patent number: 4184009
    Abstract: The invention disclosed is a floating metal/air battery wherein the anode is immersed in an electrolyte, and the cathode is exposed to the atmosphere. An electro-conductive path between the anode and cathode is achieved by a wick means in contact with the electrolyte. Embodiments are described for use in sea-water and in fresh water.
    Type: Grant
    Filed: November 15, 1978
    Date of Patent: January 15, 1980
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventor: William A. Armstrong
  • Patent number: 4175168
    Abstract: The invention disclosed relates to electrodes for use in electrochemical cells, particularly for low temperature applications, wherein the electrode comprises a strip of perforated electrochemically active material folded upon itself to form a plurality of sections. Perforated electrochemically active spacers are provided between and attached to adjacent sections.
    Type: Grant
    Filed: October 4, 1978
    Date of Patent: November 20, 1979
    Assignee: Her Majesty the Queen in right of Canada as represented by the Minister of National Defence
    Inventors: William A. Armstrong, Peter J. Powell
  • Patent number: 4066823
    Abstract: An improved gas permeable hydrophobic electrode and its method of manufacture is provided. The electrode includes (a) a current collecting grid formed of an electrically conductive metal, e.g. platinum, gold, stainless steel, nickel-clad iron, nickel wire mesh, silver wire mesh, expanded nickel, or expanded silver; (b) a noble metal catalyst, e.g. silver, platinum or palladium catalyst deposited on, and adhered to, both side faces of the current collecting grid, e.g. the nickel grid, such noble metal catalyst, e.g. silver, having been deposited in situ on a fugitive substrate, e.g. aluminum foil, from a paste of an aqueous suspension of a water-soluble metal salt, e.g. silver salt, a fluorocarbon polymer, e.g. polytetrafluoroethylene, a wetting agent, e.g. octyl phenoxpolyethoxyethanol and activated carbon, which is subsequently dried and cured at a temperature not exceeding about 150.degree. C.; and (c) a hydrophobic semi-permeable membrane, e.g.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: January 3, 1978
    Inventor: William A. Armstrong
  • Patent number: 4020239
    Abstract: A cathode for use in a hydrazine/air fuel cell which comprises a sintered nickel substrate having a silver electrocatalyst deposited thereon and having, on one side, a semipermeable hydrophobic membrane, and on the other side thereof a hydrophilic microporous separator membrane. The silver-sintered nickel substrate may be wet-proofed by dipping in a solution of PTFE and in order to lower polarization of the cathode the silver-sintered nickel substrate may be amalgamated by treatment with a mercuric salt.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: April 26, 1977
    Assignee: Her Majesty the Queen in right of Canada as represented by the Minister of National Defence
    Inventor: William A. Armstrong
  • Patent number: 3948684
    Abstract: An improved gas permeable hydrophobic electrode structure and procedures for making it are provided. The electrode structure comprises an electrically conductive metal current collecting grid and catalyst substrate, for example, nickel. A manganese dioxide catalyst is deposited on, and is adhered to, both side faces of the grid. Such manganese dioxide is one which has been deposited in situ on a suitable substrate, for example, activated carbon or sintered nickel, and is bound together within the selected substrate by means of a fluorocarbon polymer, for example, polytetrafluoroethylene. A hydrophobic semipermeable membrane, for example, a fibrous polytetrafluoroethylene membrane or a microporous polypropylene membrane, is secured on one side of the coated nickel grid.
    Type: Grant
    Filed: October 29, 1973
    Date of Patent: April 6, 1976
    Assignee: Her Majesty the Queen in right of Canada as represented by the Minister of National Defence
    Inventor: William A. Armstrong
  • Patent number: 3936793
    Abstract: A humidity-biased temperature responsive switch for controlling an automobile air conditioning compressor which closes at a warmer ambient temperature when the humidity is low than when the humidity is greater. The switch includes a sensor element having a metal strip and a hygroscopic plastic strip laminated together so that the different thermal coefficients of expansion will cause the free end of a cantilever-mounted sensor to move a contact. Absorption of water from the ambient air causes the plastic to swell and elongate and resultantly moves the contact into a closed position at a lower temperature than when the humidity is low.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: February 3, 1976
    Assignee: General Motors Corporation
    Inventor: William A. Armstrong