Patents Represented by Law Firm Mitches & Co.
  • Patent number: 4724191
    Abstract: Hydronium bonded polycrystalline shaped articles may be produced by the simple expedient of selecting a hydronium containing powder prepared by one of a plurality of prior art methods and then intermingling the hydronium powder with ortho-phosphoric acid to obtain a viscous mixture (resembling the consistency of toothpaste). The mixture is then formed into a predetermined shape, for example a disc or tube, and the shaped polycrystalline ceramic is allowed to cure. Curing may take place at an elevated temperature below 100.degree. C. for approximately 3 hours either as a step subsequent to forming, or as part of the forming step in 30 minutes at 120.degree. C. The result is bonded hydrogen conducting - hydronium, H.sub.3 O+, solid rigid structure with a smooth finish copying the mold from which it was shaped.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: February 9, 1988
    Assignee: Minister of Energy Mines & Resources
    Inventors: Areekattuthazhayil K. Kuriakose, Thomas A. Wheat, Aftab Ahmad, Jon D. Canaday, Albert J. Hanson
  • Patent number: 4719704
    Abstract: A gauge which in its preferred form consists of two vertical members and two cross bars with means for relatively adjusting the relative position of the cross bars on the vertical members is disclosed. Each of the cross bars also carries a pair of threadable castings together with a reversely threaded screw which, on rotation, moves the threadable casting toward and away from the center of each cross bar. When a plurality of such gauges are employed, one located in each of preselected cross-sectional planes of a vehicular body, the dimensions of the boey relative to datum references and from the gauge can be determined and thereupon whether the vehicle be damaged or "true" and hence undamages. Such gauges avoid the use of prior art racks and frames upon which the vehicle was placed in order to measure the vehicle trueness.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: January 19, 1988
    Inventor: John W. Hogg
  • Patent number: 4689126
    Abstract: A method of converting a feed solid polycrystalline of .beta. alumina into a hydronium conductor requires the preselection of an appropriate feed ceramic preferably with a chemical formula;(Na.sub.0.6 K.sub.0.4).sub.2 O (3 w/o MgO).beta./.beta."Al.sub.2 O.sub.3and with a f(.beta.) of 0.37.+-.0.03wherein ##EQU1## The crystallographic lattice is altered by placing the solid feed ceramic in an ionic solution or melt containing two or more ionic species of different ionic radii; the composition of the melt or solution being written: M.sub.1, M.sub.2 (M.sub.3 . . . ) X where M.sub.1 and M.sub.2 (and M.sub.3 etc.) are ions of dissimilar size and as examples sodium, potassium, lithium and hydronium ions. After a time the material is removed, washed and subjected to a field effect exchange whereby the desired hydronium conducting solid ceramic having the following chemical composition is achieved;(H.sub.3 O.sub.a.sup.+ /Na.sub.b.sup.+ /K.sub.c.sup.+).sub.2 O Z.beta./.beta."Al.sub.2 O.sub.3where (a)(b)(c)=0.fwdarw.
    Type: Grant
    Filed: November 21, 1984
    Date of Patent: August 25, 1987
    Assignee: Canadian Patents and Developments Limited
    Inventors: Michael F. Bell, Patrick S. Nicholson, Michael Sayer, Kimihiro Yamashita
  • Patent number: 4657087
    Abstract: In a particular species of the preferred embodiment, the invention contemplates a land traveller such as a farm tractor pulling a passive load such as a plough, disc or the like. A control device for directing or controlling the path of travel of the vehicle over a field, and also regulating or controlling the depth of penetration of the plough or disc into the surface of the ground according to a predetermined depth irrespective of the terrain profile. The path control system consists of locating in a predetermined way, a track whose position is sensed by an electromagnet, and the relative position of the magnet is sensed by appropriate devices such as resistence measuring devices (strain gauges or variable resistors or reostats), photoelectric devices whose values are decoded through a microprocessor whereby steering of the prime mover along the predetermined path is maintained.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: April 14, 1987
    Inventor: Zvi Livneh
  • Patent number: 4657879
    Abstract: The spray-drying of a feed liquid mixture containing dissolved feed elements is used to produce precursor powders of Na.sup.+ -super conducting sodium gadolinium silicate (Na.sub.5 GdSi.sub.4 O.sub.12), (NGS), and sodium yttrium silicate (Na.sub.5 YSi.sub.4 O.sub.12), NYS. Using these powders, very dense (>97% theoretical) solids are obtained on sintering. The resistivities of the NGS and NYS polycrystalline ceramics are 5 and 7 (.OMEGA. cm) respectively at 300.degree. C. and are dependent on the f(NGS) or f(NYS) values. In the case of NYS, the resistivity/f(NYS) relationship takes the form ##EQU1## indicative of resistive and conductive phases mixed more in parallel than in series.
    Type: Grant
    Filed: September 25, 1984
    Date of Patent: April 14, 1987
    Assignee: Canadian Patents and Developments Limited
    Inventors: Patrick S. Nicholson, Kimihiro Yamashita
  • Patent number: 4648611
    Abstract: A foldable sled is composed of essentially four operative components, two symmetrically closed loop members having two opposite sides extended and being relatively parallel to each other, each of the loops configured to lie in their own respective plane, pivot pins for pivoting the symmetrical loops to be relatively positioned so that the straight portions of each loop may be positioned relatively close or relatively far away, a fabric seat extending between two adjacent straight pieces of opposite closed loops, and a clasp for locking and constraining the closed loops into an open and a closed position, whereby in the open position, the sled is in its operative condition and in the closed, it is in a condition for convenient carriage or stowage.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: March 10, 1987
    Inventor: Ivica J. Kekich
  • Patent number: 4586991
    Abstract: An hydronium polycrystalline superionic conductor, having the formula (H.sub.3 O.sup.+,Na.sup.+).sub.5 (Re)Si.sub.4 O.sub.12, where Re=Y or Gd, is produced from precursor material being Na.sub.5 YSi.sub.4 O.sub.12 or Na.sub.5 GdSi.sub.4 O.sub.12. In order to accomplish the aforesaid a range of intermediate ceramics may be produced replacing part of the precursor ceramic sodium by ions of elements in 1A group of the Periodic Table that have an atomic weight above 32 and preferably ions of potassium, cesium, or mixtures of potassium and cesium.To produce the superionic hydronium polycrystalline ceramic conductor and the intermediate ceramic from the feed ceramics aforesaid, the feed ceramic is placed in a chloride melt wherein part of the sodium in the feed ceramic lattice is replaced by an appropriate cation from the melt such as potassium and cesium. Subsequently, a field assisted ionic exchange takes place to now replace the interceded potassium and cesium ions with the hydronium (H.sub.3 O.sup.
    Type: Grant
    Filed: September 25, 1984
    Date of Patent: May 6, 1986
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of Energy, Mines and Resources
    Inventors: Patrick S. Nicholson, Kimihiro Yamashita
  • Patent number: 4453327
    Abstract: A solar display kiosk particularly to a display kiosk that during day time conditions is illuminated by the sun. It provides, in its preferred embodiment, a closed cylindrical member placed in the vertical position with an open or a closed but light transmissive upper end, which acts as a receiver for solar or ambient light. A circumferential band at the top of the kiosk acts a shading member to place regions immediately beneath such band into shade either totally or in part (umbra and penumbra). Translucent display materials are mounted in the walls of the cylinder in the zones of umbra or penumbra. To the viewer they appear to be highly illuminated, the illumination coming from the solar light entering into the center of the cylinder.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: June 12, 1984
    Assignee: Animotion Inc.
    Inventor: Ronald A. W. Clarke
  • Patent number: 4360703
    Abstract: A "molecular p-n junction" is formed by an organic compound which has a molecular portion susceptible of electron donation and another molecular portion susceptible of electron acceptance, each of these two portions being within the same compound or molecule and interconnected by a linkage portion. Thus the compound consists of three molecular parts which may in other environments exist as separate molecules. The electron donation molecule and electron acceptance molecule are separated by an intramolecular linkage or chain so that the three form one composite molecule. The donor and acceptor molecules, if the intermolecular linkage is adequate and generally in the preferred range of 15 A to 25 A, or generally between 10 A to 40 A, is susceptible, under the influence of light, of donating an electron to the acceptor. As such, the compound functions as a "molecular p-n junction".
    Type: Grant
    Filed: April 28, 1981
    Date of Patent: November 23, 1982
    Assignee: National Research Council of Canada
    Inventors: James R. Bolton, Te-Fu Ho, Alan R. McIntosh
  • Patent number: 4232668
    Abstract: The invention discloses a gas ventilating device where the tidal volume during the inhalation phase of any cycle of patient consumption is constant and fixed; hence, the deliverable volume is independent of the head pressure of the supply source of the gas. Further, the tidal volume can be controlled by altering the differential pressure of the gas in a fixed volume tank which acts as an intermediate storage tank for gas. Control means, using fluidic devices including monostable and bistable devices control the charging and discharging of the fixed volume tank with gas so that the fixed volume of gas can be supplied to the patient.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: November 11, 1980
    Inventor: John P. Strupat