Patents Examined by G. L. Kaplan
  • Patent number: 4990226
    Abstract: A bath for electrodeposition of nickel onto a steel wire substrate from a nickel fluoborate solution. The bath is pumped to a substantial pressure in a specialized high speed, high current density continuous wire plating cell. The bath has a high concentration of nickel ions and a low pH and is operated at very high current densities and elevated temperatures to achieve a good quality nickel plate deposition at a rate far exceeding that of prior art baths. The invention particularly applies to the plating of nickel onto steel wire at current densities of up to 14,500 amps per square foot.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: February 5, 1991
    Assignee: GTE Products Corporation
    Inventors: Tom E. Byler, Kimberly J. Suchar
  • Patent number: 4990225
    Abstract: A method of manufacturing a high magnetic flux density quaternary alloy electrodeposited thin film, comprising the steps of: forming an FeCoNiCr or an FeCoNiCu quaternary alloy thin film on a cathode by using an electrodepositing electrolyte bath to which four types of ions of Fe, Co, Ni and Cr or Cu have been supplied through sulfate and/or hydrochloride, each of which contains bivalent or tervalent Fe, Co, Ni, Cr and Cu ions, by using a bath having on the basis of the density of [Ni.sup.2+ ] ion such compositions as 0.02<[Co.sup.2+ ]/[Ni.sup.2+ ]<0.9, 0.095<[Fe.sup.2+ ]/[Ni.sup.2+ ]<0.4 and 0.075<[Cr.sup.3+ ]/[Ni.sup.2+ ]<0.4, or 0.001<[Cu.sup.2+ ]/[Ni.sup.2+ ]<0.03; and arranging electrodeposition current density J to be in a range of J<60 (mA/cm.sup.2) at the cathode.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: February 5, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Yuuji Omata
  • Patent number: 4988428
    Abstract: An NOx concentration measuring apparatus employing first and second wide-range air/fuel ratio sensors for measuring an NOx concentration of gases introduced thereto through a first passage. First and second restricted orifices are provided in the first passage upstream of the first and second sensors. A second passage is connected to the first passage between the first and second orifices. A suction pump is connected to the first passage downstream of the first and second sensors for producing a suction vacuum in the first passage and is also connected to the second passage for producing a suction vacuum in the second passage. The first and second orifices are effective to prevent momentary gas pressure fluctuations from affecting the accuracy of measurement of the first and second sensors.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: January 29, 1991
    Assignee: Nissan Motor Company, Ltd.
    Inventors: Yasunori Iwakiri, Akinobu Moriyama
  • Patent number: 4988429
    Abstract: The invention is directed to a measuring cell for an electrochemical gas sensor having an electrolytic chamber and a measuring electrode as well as a counter electrode. In the direction facing the ambient, the measuring electrode includes a diffusion membrane as well as a diffusion barrier. The diffusion barrier is made of a material which is a good conductor of heat and is provided with a plurality of passages. A temperature-sensitive element is provided in the immediate proximity of these passages and faces toward the ambient. With this configuration, the temperature dependency of the diffusion capacity of the gas sample passing through the diffusion barrier can be included in the processing of the signal indicative of the measurement.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: January 29, 1991
    Assignee: Dragerwerk Aktiengesellschaft
    Inventor: Hans Matthiessen
  • Patent number: 4986892
    Abstract: An excellent oxygen sensor is provided, comprising; a sensor element having electrodes on inner and outer surfaces thereof, the electrode on the inner surface communicating to the atmosphere, and the electrode on the outer surface communicating to a gas to be measured; a metallic accommodating member accommodating the sensor element; and at least two airtight sealing portions arranged in the accommodating member for separating the gas to be measured from the atmosphere, at least one airtight sealing portion at the low temperature side of the oxygen sensor having a recessed portion formed under compression by pressing the outer surface of the metallic accommodating member after the formation of the airtight sealing portions by compressing the talc powder in the axial direction of the oxygen sensor. The oxygen sensor has splendid airtight sealing property of the airtight sealing portions containing compressed talc powders filled therein.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: January 22, 1991
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuhide Kato, Masanori Katsu
  • Patent number: 4987075
    Abstract: The inventive membrane of high selectivity comprises a laminated enzyme membrane, which is enclosed by two cellulose membranes. The laminated enzyme membrane is an enzyme-containing polyurethane layer; the cellulose membranes are coated with cellulose nitrate.The inventive process is characterized in that ferricyanide or hydrogen peroxide is added in the presence of peroxidase to the measurement sample, the measurement portion or the enzyme membrane.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: January 22, 1991
    Assignee: Akademie der Wissenschaften
    Inventors: Jurgen Nentwig, Frieder Scheller, Gunter Hanke, Wolfgang Breitmoser, Hartmut Weise, Dorothea Pfeiffer, Anette Nunchert, Florian Schubert, Christoph Meiske, Siegfried Kuhnel
  • Patent number: 4985126
    Abstract: A process and apparatus for continuously monitoring of concentrations of gaseous components in gas mixtures, with the exception of O.sub.2. The desired concentration values are obtained simultaneously and separately for the individual gas components, without disruption and with relatively greater accuracy, by a direct path. The concentration of the gaseous component is continuously measured with the aid of at least one electrochemical cell having at least one solid body which contains oxygen-ion-conducting material and a metal-oxide-containing electrode, and generates electrical signals which are a function of the concentration of the component. The measurement signals are electronically and automatically evaluated in a computer which converts them into concentration values. The converted values are compared with reference values of a program which has been programmed into the computer earlier.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: January 15, 1991
    Assignee: Kernforschungszenthrum Karlsruhe GmbH
    Inventors: Edelbert Haefele, Michael Kotter
  • Patent number: 4985123
    Abstract: A coated polarographic sensor is calibrated by exposing the sensor to calibration media having known temperatures and species chemical potentials. The sensor is allowed to equilibrate with respect to the calibration media. After equilibration, the sensor is polarized with respect to a reference electrode and the resulting transient and steady state electrochemical currents are monitored. A transient calibration equation characterizing transient sensor performance is derived from the transient electrochemical current, and a quasi-steady state calibration equation characterizing steady state sensor performance is derived from the steady state electrochemical current. The transient current of the sensor is independent of the thermophysical properties of the species in the medium so that the transient current can serve to correct the quasi-steady state calibration equation for the sensor in situ.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: January 15, 1991
    Assignee: Massachusetts Institute of Technology
    Inventor: Michael G. Curley
  • Patent number: 4983271
    Abstract: Excellent electrical connection between a female contact and an electrode terminal of an oxygen sensor can be assured for a long period of use even when the oxygen sensor is exposed to vibrations and/or humid atmosphere, by providing an oxygen sensor, comprising electrodes, a sensor element which generates an electromotive force or which changes its electric resistance value between the electrodes depending on oxygen concentration of a gas to be measured, electrode terminals arranged on the sensor element and connected to the electrodes, and a metallic accommodating member accommodating the sensor element, comprising; a female contact electrically connected to the electrode terminal; a ceramic housing electrically insulating the female contact from the metallic accommodating member; a resilient member pressing the ceramic housing; and a caulking ring pressing the resilient member to exhibit its resilient power; the female contact, the ceramic housing, the resilient member and the caulking ring forming a conse
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: January 8, 1991
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuhide Kato, Masanori Katsu
  • Patent number: 4983263
    Abstract: A zincate type zinc alloy electroplating bath which comprises a Zn compound, an alkali hydroxide, a salt of Fe(II, III) or Ni(II), a chelating agent for dissolving said salt of Fe(II, III) or Ni(II) and brightening agents. The chelating agent is selected from the group consisting of a commercially available chelating agent and a reaction product of a mixture of one or more kinds of aliphatic amine with epihalohydrin. The brightening agents contain alkylated polyalkylene polyamine in which some of the basic nitrogen atoms of polyalkylene polyamine are alkylated by alkyl groups of C.sub.1 to C.sub.3, and one or more compounds selected from the group consisting of reaction products of imidazole or its derivative with epihalohydrin and reaction products of imidazole or its derivative with epihalohydrin in the presence of aliphatic amine.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: January 8, 1991
    Assignee: Yuken Kogyo Kabushiki Kaisha
    Inventors: Yoshizumi Yasuda, Nobuaki Wada, Yukio Suzuki, Haruhisa Watai
  • Patent number: 4981570
    Abstract: The surface of an electrically conductive substrate (1) is provided with a redox layer (5) by an electrolytic polymerization process, and the surface of the resulting member is further provided with an ion carrier membrane (6) which includes polyvinyl chloride, a plasticizer and an ion carrier, thereby forming an ion sensor. Used as the plasticizer is one selected from among phthalate plasticizers, maleate plasticizers, adipate plasticizers, carboxylate plasticizers and polycaprolactone plasticizers, or one selected from among plasticizers comprising modified ethylene - vinyl acetate copolymer. The ion sensor obtained has low solubility in the plasticizer of the redox layer and therefore is highly stable. Since the ion sensor has little toxicity, it can be used in vivo. A preferred plasticizer is benzopohenon-tetracarboxylic under cyclic acid.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: January 1, 1991
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Shuichiro Yamaguchi, Takanao Suzuki, Norio Daikuhara, Takeshi Shimomura, Noboru Oyama
  • Patent number: 4981564
    Abstract: Heteroaromatic compounds having at least two nitrogen atoms may be used to regulate consistency of alloy content and of deposit thickness. Modified nonionic surfactants which lack terminal hydroxy groups are used as grain refiners having low tendency to cause foam build-up in electroplating baths. Dioxolanes may be used to produce deposits having, as desired, a white uniform matte, a semi-bright plate, or a mirror bright surface. Antioxidants are used to prevent oxidation of divalent tin.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: January 1, 1991
    Assignee: Technic Inc.
    Inventors: Harry Kroll, Florence Butler, Therese R. Souza
  • Patent number: 4981125
    Abstract: An output correction method for a proportional-output type O.sub.2 sensor including an oxygen concentration detecting element formed by an oxygen-pumping element and a cell element, each of the oxygen-pumping element and the cell element being composed of a wall of a solid electrolytic material having oxygen ion-conductivity, and a pair of electrodes having the wall interposed therebetween. The oxgen-pumping element is supplied with an output voltage corresponding to a difference between a voltage developed between the electrodes of the cell element and a predetermined reference voltage, and current flowing in the oxygen-pumping element is detected. A correction resistance supplies information indicative of a deviation of an air-fuel ratio detected by the sensor with respect to a predetermined reference air-fuel ratio. A correction value is determined on the basis of the information and the direction of flow of the current. The detected current is corrected by the use of the determined corrected value.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: January 1, 1991
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Akira Kato, Toru Yano, Yasuhiro Toyoda
  • Patent number: 4981571
    Abstract: Membrane for barium ion selective electrodeThe solution pertains to a membrane for barium ion selective electrode formed by the film of suitable polymeric material, for example, high-molecular weight poly(vinyl chloride), with an ion exchanger based on a neutral carrier, namely N,N'-diphenyl-N,N'-di-(2-n-butyloxycarbonylphenyl)diamide of 3,6,9-trioxaundecandioic acid ##STR1##
    Type: Grant
    Filed: April 11, 1989
    Date of Patent: January 1, 1991
    Assignee: Ceskoslovenska akademie ved
    Inventors: Miroslav Panoch, Miloslav Semler, Bretislav Manek, Miloslav Kolinsky
  • Patent number: 4980035
    Abstract: The bath for electrolytic deposition of an Au-Cu-Zn alloy contains cyanide complexes of Au, of Cu and of Zn, a surface-active agent and a soluble Te and/or Bi salt. It may also contain a non-cyanide organic Zn complex, and a conductive salt and/or alkali metal or ammonium cyanide.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: December 25, 1990
    Assignee: Engelhard Corporation
    Inventor: Heinz Emmenegger
  • Patent number: 4980042
    Abstract: An oxygen sensor comprising a hollow cylindrical member closed at one end but open at the other to admit a reference gas. There is at least one radial through-hole in the hollow cylindrical member. An oxygen-ion conductive solid electrolyte later has at least one pair of electrodes on its opposite sides. The electrolyte layer is wrapped around the hollow cylindrical member with the electrode on its inner side facing the through hole. In other embodiments, an oxygen sensor is provided which is very insensitive to the direction of flow of the gas to be analyzed. The electrodes of the sensor are spaced at substantially equal intervals on the circumference of a cylindrical solid electrolyte layer in registry with through-holes formed in a hollow tubular member surrounded by the electrolyte layer. A heating unit may be formed on either the inner or outer surface of the solid electrolyte layer.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: December 25, 1990
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Haruhisa Shiomi, Toshihiko Aoyama, Yoshitake Kawachi, Ken Minoha
  • Patent number: 4980043
    Abstract: In a sheet type reference electrode having a gelatinized internal solution, a liquid junction surface of the gelatinized internal solution is coated with a hydrophilic porous thin film. Alternatively, a liquid junction member contacts the gelatinized internal solution and is coated with a hydrophilic porous thin film. In either event, the thin film controls the diffusion of ions from the gelatinized internal solution. A liquid junction portion is also provided by impregnating a chemically stabilized, hydrophilic, high molecular porous material with a gelatinized composition which remains wet.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: December 25, 1990
    Assignee: Horiba, Ltd.
    Inventors: Katsuhiko Tomita, Haruo Kotani
  • Patent number: 4976844
    Abstract: The invention relates to a sealing and insulating construction of a sensor for pressurized working conditions. The construction comprises a pressure balancing chamber (1) which is open towards the pressurized space, a sensor (4) which is partly located within the chamber and partly protrudes therefrom, as well as a conductor (6) insulated from the housing (2) and coupled to the sensor (4), and brought into the chamber via a leadthrough (5). Moreover, the construction includes insulation (7) for filling the space that surrounds the chamber around the sensor, as well as a piston (8) for separating the insulation around the sensor from the pressurized space, so that under pressure the sensor is evenly loaded on all sides, and consequently not subject to such tensions that could break it.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: December 11, 1990
    Inventors: Lauri Selin, Pertti Aaltonen, Heikki Illi
  • Patent number: 4976839
    Abstract: A titanium nitride barrier layer of 50 to 200 nm in thickness is fabricated between a silicon substrate and an aluminum electrode layer of an IC device by reactive sputtering performed in a mixed gas including oxygen in a proportion of 1 to 5% by volume relative to other gases, comprising an inert gas and a reactive gas, providing the temperature of the silicon substrate at 350.degree. to 550.degree. C. during the reactive sputtering, so that the product has a failure rate, indicating the property of preventing mutual diffusion of silicon and aluminum atoms from occurring, of less than 1% and a resistivity less than 100 .mu..OMEGA..cm.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: December 11, 1990
    Assignee: Fujitsu Limited
    Inventor: Minoru Inoue
  • Patent number: 4976827
    Abstract: Prior to coating with lacquer or adhesive, or laminating with plastic, strips or foils of aluminum or aluminum alloys are pretreated in an electrolyte by electrochemical oxidation using alternating current. These strips or foils are passed through an aqueous electrolyte which is heated to 25.degree.-95.degree. C. and has a pH adjusted to 4.2-12.5. The electrolyte is silicate-free and contains 0.01-10 weight percent of an organic compound which forms a complex with aluminum. A current of 10-500 coulomb/dm.sup.2 is supplied to the workface of the strips or foils.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: December 11, 1990
    Assignee: Swiss Aluminium Ltd.
    Inventor: Zdenek Maly