baber/WOPTO huggingface dataset:
Patent CA-2019284-C (CA)
Title: Polyester articles
Inventor: MEIROWITZ RANDY E
IPC: C08J7/04
Filed: 1990-06-19
Granted: 2001-10-30
Abstract: A generally hydrophobic polyester article is provided with a generally hydrophilic surface by contacting said generally hydrophobic polyester with a copolymeric material while said polyester is at a temperature above its melting point. The copolymeric composition comprises a generally hydrophobic moiety and a generally hydrophilic moiety. Also disclosed is a method for imparting the hydrophilic surface to a generally hydrophobic polyester which method comprises contacting a generally hydrophobic polyester with a copolymeric material while said generally hydrophobic polyester is at a temperature above its melting point. In one preferred embodiment the generally hydrophobic polyester is contacted with said copolymeric composition immediately after said polyester has been extruded and while said polyester is undergoing die swell.
Patent CA-2025213-C (CA)
Title: Optical head control circuit for optical tape recording/reproducing apparatus
Inventor: NARAHARA TATSUYA
IPC: G11B7/003
Filed: 1990-09-12
Granted: 1999-12-14
Abstract: A control circuit for controlling the position of a head in an optical tape recording/reproducing device having a rotary optical head controls the position of the head at the instant that it faces the tape based upon a desired head position derived from a preceding period in which it was facing the tape.      A head position error signal is sampled and added to a sample head position signal during a period when the head is facing the tape and is held during the time the head is not facing the tape.      The instant the head begins to face the tape once again, this desired value that has been held is applied to the head in order to reduce the pull-in time of the control circuit and provide more time for information recording/reproduction during the time the rotary optical head is facing the tape.
Patent CA-2027856-C (CA)
Title: Unilateral extensible external clamp for treating bone diseases
Inventor: PFEIL JOACHIM
IPC: A61B17/64
Filed: 1990-03-03
Granted: 1999-11-30
Abstract: The invention concerns a unilateral, extensible external tensioning device for treating bone disease and for the purpose of axially and externally affixing bones or parts of fractured bones. At least one piston each 3 and 4 is mounted on both sides in telescoping manner to a central part 1, various link means being rotatably attachable to the outer ends of these pistons 3 and 4.
Patent CA-2029089-C (CA)
Title: Intrusion detection system
Inventor: RANSDELL BILL J
IPC: G01S15/52
Filed: 1990-10-31
Granted: 1995-01-10
Abstract: ABSTRACT      A microprocessor-based ultrasonic intrusion detection system includes an initialization mode wherein a plurality of echoes are cumulatively processed to produce a reference or signature data set representing the area to be monitored without intruding objects.  Later received echoes are compared to this signature so that an intruding object will cause generation of an alarm signal.  Time varying thresholds are utilized to compensate for attenuation caused by increased distance.
Patent CA-2032442-C (CA)
Title: Toner developed electrostatic imaging process for outdoor signs
Inventor: CHOU HSIN-HSIN
IPC: G03G13/00
Filed: 1990-12-17
Granted: 2000-10-17
Abstract: An electrographic imaging process is described in which electrostatic images are toned in sequence to form a multicolor intermediate image on a temporary dielectric receptor. The intermediate image is then transferred to a permanent receptor. Certain relative properties of the toner and the intermediate image, such as surface energy, T g, work of adhesion, and complex dynamic viscosity, have been found to be important to the production of good final images.
Patent CA-2034414-C (CA)
Title: Method of controlling zebra mussels
Inventor: LEE HAROLD H
IPC: C07H15/256
Filed: 1991-01-17
Granted: 1997-05-27
Abstract: Zebra mussels are controlled by contacting them with the active portion of a Phytolacca plant.
Patent CA-2035793-C (CA)
Title: Reagent and method of using same for automatically counting basophilic leukocytes in the blood in resistivity variation measuring apparatus
Inventor: LEFEVRE DIDIER
IPC: G01N33/49
Filed: 1991-02-06
Granted: 1997-05-20
Abstract: The invention relates to a reagent and a method of using same for automatically determining the population of the basophilic leukocytes in the blood. The invention relates more particularly to a new formulation for a differential lysing reagent that lyses all the blood cells except for the basophils, particularly suitable for the measuring principle based on resistivity measurement, that is to say the concentrations of the constituents and the pH of the solution are suitable for ensuring good electrical conductivity of the medium. The reagent according to the invention will find an application in apparatus for automatically determining blood formulae by means of resistivity variation measurements.
Patent CA-2036833-C (CA)
Title: Actuation cell response and mapping determinations for web forming machines
Inventor: CHEN SHIH-CHIN
IPC: D21G9/00
Filed: 1991-02-21
Granted: 1994-06-28
Abstract: A standard control signal for a web forming machine is temporarily interrupted and replaced by a perturbing signal or signals which are applied to one, a grouping, or all of a series of actuation cells of the web forming machine.  One or more actuation cells are driven with an alternating perturbing signal(s) which generate a corresponding action in the actuation cell(s).  The perturbing signal(s) alternates from a neutral position of the cell and is selected to minimize mean effects over any given period of time.  The effects of the alternating signal(s) on the web appear within the area of the web which is affected by the actuation cell(s) such that the mapping and the response of the actuation cell(s) can be determined by monitoring that portion of the web which is formed while the alternating signal(s) is applied to the actuation cell(s).  The mapping(s) and/or response(s) of the actuation cell(s) are obtained by correlating the perturbing signal(s) and a web property signal or profile signal obtained by monitoring the web formed by the machine.  The perturbing signal(s) is defined by a pseudo-random binary sequence with multiple signals being selected to be statistically independent of one another. To ensure that the web is not perturbed beyond defined specifications, the perturbing signal preferably is gradually increased in amplitude and is terminated individually for each actuation cell upon reaching a usable amplitude.
Patent CA-2038246-C (CA)
Title: Normally closed duckbill valve assembly
Inventor: ATKINSON GORDON E
IPC: F16K17/28
Filed: 1991-03-14
Granted: 2001-08-07
Abstract: The present invention provides a valve assembly for allowing fluid flow in a first direction and for preventing fluid flow in a second, opposite direction including a valve housing having first and second ports opening into the housing. A flow regulator is positioned within the housing arid includes an outer wall which is formed as a substantially cylindrical member. The regulator includes a pair of semi-circular valve lips which are oriented in converging relationship to each other to form an outlet slit at one end of the regulator. The valve lips are connected to the outer wall by a pair of concave connecting walls wherein the lips and connecting walls form a pair of cavities on either side of the outlet slit. A pair of elongated projections are located along diametrically opposing sides of the outer wall for biasing the outer wall inwardly whereby a biasing force is applied to close the lips.
Patent CA-2038790-C (CA)
Title: Metal plate/asphalt pavement
Inventor: WATSON RONALD DAVID
IPC: E01C5/22
Filed: 1991-03-21
Granted: 2001-12-11
Abstract: A combination of a metal plate and a four layer paving system includes: (a) a metal plate; (b) a first primer layer, consisting of an elastomer modified asphalt; (c) an aggregate layer; (d) a second primer layer, consisting of an elastomer modified asphalt; and (e) a layer of asphalt pavement.      The combination is resistant to delamination between the metal plate and the paving system. It may be utilized in applications which are subjected to the load of automotive traffic, such as bridge decking or the flooring of a parking garage.
Patent CA-2048570-C (CA)
Inventor: BURRAGE LAWRENCE M
IPC: H01F41/02
Filed: 1991-08-07
Granted: 2000-05-02
Abstract: A transformer core of non-circular cross-section, preferably rectilinear, is formed by successively wrapping individual packets of core strips around a stationary mandrel of non-circular cross-section. Each packet is wrapped by a pair of yieldably biased rollers which follow the contour of the mandrel. As the packet is being wrapped, pressure pads are extended to hold the packet against the mandrel. The pressure pads are momentarily retracted to accommodate return movement of the roller wipers to receive a subsequent packet.      The ends of the packet form a joint at the top of the mandrel. The positions of successive packets can be changed to vary the location of the joint in order to form a desired joint pattern.
Patent CA-2048954-C (CA)
Title: Speaker box
Inventor: LEWIS LEOPOLD A
IPC: H04R1/28
Filed: 1991-08-12
Granted: 2002-07-16
Abstract: This invention relates generally to vented loudspeakers for the reproduction of musical sounds, but particularly to the design and location of ports or vents that tune the enclosure. The loudspeaker system has an enclosure, having a front baffle and a pair of loudspeaker drivers mounted in the baffle. The enclosure has a hexagonal cross-section. A pair of vents are each located at a juncture of the vertical side edges of the front baffle and its adjoining panels. The vents lead into the enclosure via a conduit, which ends in an inlet. The inlet is positioned within the enclosure to face the rear of the loudspeaker driver. By this arrangement high to mid frequency sound waves radiated within the boundaries of the enclosure and entering the inlet are substantially attenuated in the conduit and low frequency sound waves radiated within the boundaries of the enclosure are reinforced with sound waves directly radiated from the front of the loudspeaker driver.
Patent CA-2049666-C (CA)
Title: Method for reducing the energy consumption and minimizing the martensite formation when joining a connecting piece of metal with a metal surface by pin brazing and arrangement forcarrying out the method
Inventor: BAVHAMMAR TORSTEN
IPC: B23K3/047
Filed: 1991-08-22
Granted: 2002-03-26
Abstract: A method and apparatus for reducing the energy consumption and minimizing the martensite formation when joining a connecting piece of metal with a metal surface by pin brazing, involving exact measurement and control of the energy required for melting down a given lead against a given work piece surface. The current is controlled such that the energy imparted to melt the lead will be interrupted when a precise energy required for melting off a given melting lead is achieved, automatically forwarding the melted lead as the lead is melted off, and interrupting the process after a pre-defined time interval has expired that the length of the welding arc/distance between the melting lead and the work piece remain constant during the brazing process.
Patent CA-2054873-C (CA)
Title: Method of making polarization retaining fiber
Inventor: BERKEY GEORGE E
IPC: G02B6/024
Filed: 1991-11-04
Granted: 2002-04-09
Abstract: Disclosed is a method of making a polarization retaining single-mode optical fiber. Longitudinal grooves are formed on opposite sides of a cylindrically-shaped core preform having a glass core surrounded by cladding glass.       The core preform is inserted into a glass tube, the tube is shrunk onto the core preform, and the interface between the core preform and the tube is fused to form a solid preform having longitudinal apertures on opposite sides of the core. An etchant gas is flowed through the apertures to enlarge the apertures into holes having a substantially round cross-section. Inserted into each aperture is a stress rod formed of glass having a coefficient of expansion different from that of the cladding glass. The resultant draw blank is drawn to form a single-mode optical fiber having a core that is subjected to a stress-induced birefringence.
Patent CA-2055537-C (CA)
Title: Container grouping apparatus
Inventor: MUENCH KARL
IPC: B65G47/29
Filed: 1991-11-14
Granted: 1995-08-01
Abstract: A grouping apparatus for separating from a stream of tightly packed containers that is being fed by a conveyor groups of containers.   Provided on at least two continuously rotating belt or chain type drive elements are a plurality of grouping mechanisms having abutment and retaining surfaces for the containers.   These surfaces are moved by the drive element along a continuous path of rotation and along a portion of this path of rotation that proceeds in a conveying direction of the conveyor extend into the path of movement of the containers.   The spacing between the abutment and retaining surfaces of two successive grouping mechanisms is adjustable in conformity with the diameter of the containers.  For this purpose, each grouping mechanism is pivotably secured to the drive elements and is provided with a guide arm that extends radially relative to the pivot axis and cooperates with a control member that for altering the spacing is pivotable relative to the drive element and is provided with a continuous control curve that is engaged by a slide piece or control roller with which the guide arm is provided at a radial distance from the pivot axis.
Patent CA-2057055-C (CA)
Title: Method of treating catabolic, gut-associated pathological processes and impaired host defenses
Inventor: SMITH ROBERT J
IPC: A61K31/195
Filed: 1990-06-04
Granted: 2002-01-15
Abstract: The invention relates to a method for treating catabolic, gut-associated pathological processes including intestinal mucosal and pancreatic atrophy and enhanced gut permeability, impairment of host defenses and compromised immune function, and for promoting recovery from bone marrow transplantation in an animal, which comprises administering to an animal a therapeutical-ly effective amount of glutamine or an analogue.
Patent CA-2057197-C (CA)
Title: Compressed air blowing apparatus for use in green sand mold molding facility
Inventor: OISHI UKICHI
IPC: B22C/
Filed: 1991-12-06
Granted: 2001-07-17
Abstract: A compressed air blowing apparatus for supplying compressed air to molding sand placed in a flask is arranged in such a manner that its compressed air reservoir tank is constituted by a surface-plate frame and a cover, the frame having a compressed-air cutlet part which can be opened/closed by a sectioning device and a piston which can be vertically moved. The sectioning device is constituted by concentrically disposed large and small cylindrical members by a cover member secured to the large and small cylindrical members having air feed holes formed between said large cylindrical member and said small cylindrical member and by connecting duct for communicating the outside of the cylindrical member with the inside of the small cylindrical members. As an alternative to this, the sectioning device is composed of a cylindrical member extending vertically and having a spur-like cross-sectional shape and a cover member hermetically secured to the lower end portion of the cylindrical member and having a spur-like air feed hole communicated with an inside space of the cylindrical member. When the piston is moved upwards, compressed air in the compressed air reservoir tank is quickly discharged by a large quantity through the outlet port via the sectioning device.
Patent CA-2057550-C (CA)
Title: Induction furnace having an oblique coil member
Inventor: MATSUOKA TOSHIO
IPC: H05B6/24
Filed: 1991-12-12
Granted: 1996-06-11
Abstract: In an induction furnace including a crucible having a crucible center axis and a coil member wound around the crucible, the coil member has a coil center axis oblique to the crucible center axis at an acute angle between 3° and 10°.  The coil member is consequently wound around the crucible so that each winding of the coil member is inclined to the crucible center axis at an angle except 90° and has a highest position and a lowest position on a crucible side wall of the crucible.  An inlet port and an outlet port of the crucible are located at positions adjacent to the highest and the lowest positions of the windings, respectively.
Patent CA-2059697-C (CA)
Title: Smoking article
Inventor: PORENSKI HARRY STEPHEN
IPC: A24D1/22
Filed: 1992-01-20
Granted: 1997-01-28
Abstract: A smoking article comprising a smoking section and a mouthpiece section, wherein the fluids passing from the smoking section into the mouthpiece section are limited to those from a flavoring material contained in a central cylindrical combustible tube.
Patent CA-2061623-C (CA)
Title: Sub-micron imaging
Inventor: WHITE DONALD L
IPC: G03F7/20
Filed: 1992-02-21
Granted: 1998-11-17
Abstract: Imaging at sub-micron dimensions - at dimensions ordinarily thought to approximate those within diffraction limitations of the chosen imaging radiation - is expedited by use of a new category of phase masks. The new mask structure provides for phase shifting by use of waveguides. Waveguides of such dimensions,material, and spacing as to accommodate image resolution impairment, may consistof filled or unfilled apertures or of protuberances, all of constant length equal to the thickness of the mask layer in which constructed.
Patent CA-2068034-C (CA)
Title: Folding gate ramp for pickup trucks
Inventor: MCCLEARY DENNIS M
IPC: B60P1/43
Filed: 1992-05-05
Granted: 1999-08-10
Abstract: A folding ramp replaces the tailgate of a pickup truck. The ramp has two congruent rectangular panels joined by knockdown hinges. The inner panel is pivotally attached to the truck just as the tailgate was. The two panels relatively rotate between an extended planar disposition for use as a ramp and a folded or sandwiched position for use as a replacement gate. The inner panel includes hardware for pivotal attachment to the bed, for latching to the ends of the sidewalls of the truck bed, and for clamping the two panels together when in the gate position. The hinges have removable pins, so that the two panels can be separated;  the inner panel can then be used alone as a hate. For trucks with step bumpers, the inner panel may include an extension, comprising a cross bar pivotally attached to the truck, and two parallel telescoping arms slidingly inserted into the side members of the inner panel. The arms bridge the width of the step bumper and remain horizontal; the two panels slope down to the ground from the ends of the arms.
Patent CA-2071227-C (CA)
Inventor: UZELAC MILAN
IPC: H02G15/08
Filed: 1992-06-15
Granted: 2003-03-18
Abstract: A device for joining sections of solid-dielectric underground cable comprises conductor extension pieces or ferrules respectively attached to the center conductors of each of the cable sections, conductor inserts installed in a cavity of each of the ferrules, and a conductor clamp for clamping the ferrules together in a predetermined longitudinal arrangement.      The conductor clamp comprises a pair of semi-cylindrical shell pieces which, when assembled together, form a modified cylindrical structure having a central aperture for receiving the ferrules. Each conductor insert includes a disk-shaped flange plate on its outer end. The central aperture includes a cavity having an enlarged inner diameter for receiving and constraining the disk-shaped flange plates of the conductor inserts. The shell pieces of the clamp are assembled in an opposed relationship to form a modified cylinder surrounding the ferrules and the conductor inserts. Fasteners are used to compress the shall pieces toward one another into secure engagement with the ferrules. The fasteners are removable, thereby allowing the clamp to be disassembled so that the joint may be easily disconnected when required. The shell pieces are tightly compressed against the ferrules so that the ferrules, and the center conductors to which they are attached, are retained in a desired predetermined mechanical relationship. Because the flange plates of the conductor inserts are larger than the central aperture of the assembled clamp, the flange plates are longitudinally constrained by the walls of the cavity. As a result, the assembly can withstand large forces in tension and compression which may be produced due to thermal expansion and contraction of the cable. In addition, the compression of the shell pieces against the ferrules causes the interior walls of the central aperture to bear tightly against the ferrules along a significant distance, thereby producing an electrical connection capable of carrying high currents between these parts.      Accordingly, an electrically conductive path is formed from the first cable center conductor through the first ferrule, the conductor clamp, and the second ferrule, to the second cable center conductor.
Patent CA-2077395-C (CA)
Inventor: TAKAI YOUSUKE
IPC: C04B16/06
Filed: 1992-09-02
Granted: 2000-11-28
Abstract: The invention relates to cement articles, having excellent bending strength and Charpy impact strength. The cement articles are manufactured with an extremely strong polypropylene fibre having good dispersion. The extremely strong fibre which is made of the polypropylene fibre has a narrow molecular weight distribution and a high stereoregularity and is drawn at a high temperture and treated with normal alkylphosphate alkaline metal salt. The extremely strong polypropylene fibre is a drawn thread of highly crystalline polypropylene having Q<5, 97<HI<100, 94<IPF<100, with Q being the ratio of weight average molecular weight to number-average molecular weight, HI being the insoluble content of boiling n-heptane in wt% and IPF being the isotactic pentad fraction in mol%. The fibre comprises from 0.05 % to 10 wt% of alkylphosphate alkaline metal salt and has strong breakage strength, greater than 6 g/denier.
Patent CA-2079274-C (CA)
Title: Blends of glycolide and/or lactide polymers and caprolactone and/or trimethylene carbonate polymers and absorbable surgical devices made therefrom
Inventor: KAPLAN DONALD S
IPC: C08L69/00
Filed: 1992-09-28
Granted: 2004-11-30
Abstract: Polymer blends of glycolide and/or lactide homopolymer and/or glycolide/lactide copolymer and polycaprolactone and/or polytrimethylene carbonate homopolymer or copolymers thereof and absorbable surgical devices manufactured therefrom having improved mechanical properties, such as improved impact resistance and improved cyclic flex, are disclosed.
Patent CA-2087499-C (CA)
Inventor: NOWARA EKKEHARD
IPC: F16L59/02
Filed: 1993-01-18
Granted: 1999-04-20
Abstract: A thermal insulating body, or molding, for thermal insulation, consisting of a shell which can be evacuated and which is filled with a solid, microporous thermal insulating material, is characterized by the fact that at least the end surfaces (3) of the shell (1) consist of material which is a poor thermal conductor, that the microporous thermal insulation material consists of compression- proof and baked fibrillar micro glass fibers, and that the fibrillar micro glass fibers are compacted and pressed into three-dimensional panels (4).
Patent CA-2090634-C (CA)
Title: Novel cyclosporins
Inventor: BOELSTERLI JOHANN JAKOB
IPC: A61K38/13
Filed: 1993-03-01
Granted: 2005-12-13
Abstract: Cyclosporins wherein the residue at the 1-position has the formula I      in which -x-y- is -CH=CH-(trans) or -CH2-CH2-, X is 0 or S and R is hydrogen, optionally halo or hydroxy substituted-C1-3-alkyl, -alkoxy or -alkylthio, or amino or mono- or di-(C1-2alkyl)-amino, useful as pharmaceuticals, in particular for asthma therapy.