baber/WOPTO huggingface dataset:
Patent CA-2010109-A1 (CA)
Title: Method of arranging signal points in a quadrature amplitude modulation/demodulation system
Inventor: ARAI YASUHIRO
IPC: H04L27/34
Filed: 1990-02-15
Abstract: Abstract of the Disclosure In a signal point arranging method for use with a quadrature amplitude modulator/demodulator device in which a desired number of signal points are arranged on a rectangular plane, a plurality of grid points are first set such that they are symmetrical with respect to the rectangular coordinate axes of the rectangular plane and arranged at intervals of a unit distance.          Next, a plurality of concentric circles with their center at the coordinate origin of the rectangular plane are set, each of the concentric circles having a radius equal to a distance between the coordinate origin and a grid point.  Then, a desired number of signal points are arranged on points of intersection of said grid points, said concentric circles beginning with the circle smallest in radius and continuing with circles of increasing radius. As a result, each of the signal points can be arranged as close to the coordinate origin as possible, thus enabling the peak power of modulated signals to be minimized.   In addition, since the distance between signal points can be held constant, the S/N characteristic does not vary with the signal points and a constant transmission error rate can be secured.  As a result, a signal point arrangement is obtained which enables data transmission at minimum required power,  reduces transmission error rate and minimizes the S/N characteristic.
Patent CA-2010143-A1 (CA)
Inventor: TOSO VICTOR
IPC: A47C4/52
Filed: 1990-02-15
Abstract: back support adapted to engage the lumbar region of the wearer having a pair of straps which extend longitudinally from the ends of the support member and terminate in loops to engage the knees of the wearer when the wearer is seated on the ground or on a backless support, such as a bench or the like. The force of the wearer's knees on the straps pulls the back-supporting member against the lower  back  supporting it and enabling  the wearer to sit upright comfortably for extended periods of time.          The back support is provided with an integrally formed container pack by providing a closure member along the outside periphery of the support which, in the closed position, forms a container pack for the straps. Carrying handles are provided.  The back support further  includes  a  buckle  for  connecting  the  straps  together thereby restricting movement of the legs away from each other.          The back support also includes a retainer strap to attach and maintain the back support in position on the back of the user when the straps are disengaged from the knees of the user.
Patent CA-2012538-A1 (CA)
Inventor: PARNELL COLIN D
IPC: B32B27/16
Filed: 1990-03-19
Abstract: A multi-layer film useful in food packaging comprising a first core layer comprising VLDPE or LLDPE; optionally a second core layer comprising VLDPE or LLDPE; two outer layers each comprising an ionomer; and further core layers between the first core layer and the outer layer and between the second core layer and the outer layer the further core layers comprising an olefin polymer or copolymer. The film may also include an oxygen barrier layer and may be oriented to provide a heat shrinkable film.
Patent CA-2015419-A1 (CA)
Inventor: KONISHI ICHIRO
IPC: B27K7/00
Filed: 1990-04-25
Abstract: Method, and appts. for deodorisation of cork, particularly the removal of 2,46-trichloroanisole which has a characteristic odour, the method comprises (a) putting the cork in a container, (b) supplying steam to the container for generating steam flow at a given temp. and a given pressure, being selected for penetrating steam molecule into internal structure of cork and promoting steam distillation within the internal structure of cork, (c) discharging the steam past the cork and contg. the substance originating offensive odour, from the container, in which (d) the substance originating offensive odour may be 2,4, 6-trichlorophenol, which may be precursor of 2,4, 6-trichloroanisole.
Patent CA-2016315-A1 (CA)
Title: Spheroidin dna isolate and recombinant entomopoxvirus expression vectors
Inventor: YUEN KAI-CHUNG L
IPC: C07K14/065
Filed: 1990-05-08
Abstract: TITLE OF THE INVENTION          Spheroidin DNA isolate and recombinant entomopoxvirus expression vectors.            ABSTRACT OF THE DISCLOSURE         A DNA isolate consisting essentially of a DNA sequence encoding spheroidin and recombinant entomopoxvirus expression vectors capable of expressing a selected gene or portion thereof in tissue culture insect cells or insect larvae are described.          These  expression  vectors  consist  of  entomopoxvirus genomes comprising at least one selected gene or portion thereof.  The selected gene or portion thereof is under the transcriptional control of an entomopoxvirus promoter, preferably the spheroidin promoter.  Also within the scope of the present invention is a method for producing viral transfer vectors, recombinant viral transfer  vectors  and  recombinant  viral  expression  vectors utilizing  entomopoxvirus  DNA  segments.     The  recombinant entomopoxvirus expression vectors of the present invention are to be used for the production of proteins useful in medical, forestry and agricultural fields.
Patent CA-2020393-A1 (CA)
Title: Penetration of power installed anchor
Inventor: HAMILTON DANIEL
IPC: E02D5/80
Filed: 1990-07-04
Abstract: ABSTRACT OF THE DISCLOSURE    An earth anchor apparatus adapted to be driven by a source of  rotational driving force into unbroken soil includes a longitudinally extending hub having first and second axial ends. A recess is provided in one axial end of the hub by which the anchor may be driven,  and a radially extending, load-bearing element is affixed to the hub between the axial ends. An earth engaging lead tip extends axially from the second end of the hub and includes a first cutting edge extending in a direction generally transverse to the longitudinal axis of the hub and arranged  to  cut  into and break  soil  encountered thereby, a front surface extending between the hub and the first cutting edge, and a second cutting edge ex-tending between the first cutting edge and the leading edge of the load bearing element.  The  second cutting edge is adapted to both cut soil and guide it from the first cutting edge toward the load-bearing element along the front surface so that as soil is cut it is moved away from the unbroken soil.
Patent CA-2024248-A1 (CA)
Title: 7-substituted hmg-coa reductase inhibitors
Inventor: DUGGAN MARK E
IPC: C07D407/12
Filed: 1990-08-29
Abstract: TITLE OF THE INVENTION 7-SUBSTITUTED HMG-CoA REDUCTASE INHIBITORS            ABSTRACT OF THE INVENTION         Novel HMG-CoA reductase inhibitors are useful as antihypercholesterolemic agents and are represented by structural formulae (I) and (II):         (I)              (II)
Patent CA-2024498-A1 (CA)
Inventor: YONKER DONALD W JR
IPC: B23K35/30
Filed: 1990-08-31
Abstract: An iron based filler wire is described for use in gas shielded arc welding and includes between about 0.05 to 0.09 weight  percent  carbon,   1.10  to  1.40  weight  percent manganese,  0.70  to  1.00 weight percent  silicon, 0.00  to 0.025  weight  percent  phosphorus,  0.00  to  0.225  weight percent sulfur and 0.0 to 0.3 weight percent copper.   The obtained weldment produced in CO2 shielding gas possesses an average Charpy V-notch impact value of at least 45 ft.-lbs. at -20°F.
Patent CA-2025061-A1 (CA)
Title: Belt scraper with gear adjustment
Inventor: STOLL DONALD L
IPC: B65G45/16
Filed: 1990-09-11
Abstract: A belt scraper which has first and second pairs of scraper support arms as well as first and second actuator arms for each of the support arms, and includes a gear adjustment by which the position of the belt scrapers may be adjusted with respect to the belt and with respect to the actuator arms, from a convenient position alongside of the belt.
Patent CA-2027574-A1 (CA)
Title: Integrated separation method for di-isopropyl ether and methyl tertiary alkyl ether processes
Inventor: HARANDI MOHSEN N
IPC: C07B61/00
Filed: 1990-03-19
Abstract: The process for manufacturing tertiary alkyl ethers such as MTBE, TAME and isopropyl tertiary alkyl ether and that for manufacturing di-isopropyl ether (DIPE) are integrated into an overall process to produce high octane gasoline rich in these ethers. The integration is preferably achieved in a combined separation step where the effluents from both etherification processes are fed to a water wash tower for separation into an organic phase containing C3+ hydrocarbons and oxygenates including C4+ ethers and an aqueous phase which contains methanol and isopropanol. The aqueous phase is recycled to the DIPE etherification zone while the organic phase is debutanized to produce a bottom stream comprising high octane gasoline rich ethers and an overhead stream comprising C4- hydrocarbons. The water wash step allows large excess quantities of methanol to be used in the MTBE etherification step without recycle. The invention advantageously employs a common water washing step and common debutanizing step in the manufacture of tertiary alkyl ethers and DIPE.
Patent CA-2028620-A1 (CA)
Title: Process for the preparation of alternating copolymers prepared from unsaturated polar compounds and olefins
Inventor: EISENBACH CLAUS D
IPC: C08F210/00
Filed: 1990-10-26
Abstract: ABSTRACT OF THE DISCLOSURE:            Process for the preparation of alternating copolymers prepared from unsaturated polar compounds and olefins The invention relates to a process for the preparation of alternating copolymers from unsaturated polar compounds and olefins in the presence of complexing agents, in which  the  complexing  agent  comprising the primarily formed copolymer/metal compound complex can be recovered in a simple manner and in reusable form.            The copolymerization is carried out in the presence of salts,  such as  nitrates,  but preferably halides,  of divalent metal ions as the complexing agent in organic solvents at pressures of up to about 100 bar and at temperatures between -78°C and 100°C with the use of free-radical initiators.            The reaction product is a mixture of the copolymer of a strictly  alternating  structure  of  unsaturated  polar compounds and olefin, and of a copolymer which is higher in  the  unsaturated  polar  compound.  The  alternating copolymer can be easily separated therefrom by extraction with solvents, such as trichloromethane or acetone.
Patent CA-2029955-A1 (CA)
Title: Structured kaolin used to fill paper
Inventor: NEMEH SAADALLAH
IPC: D21H17/68
Filed: 1990-11-14
Abstract: Abstract The present invention provide means for improving the opacifying properties of cationally bulked kaolin clay pigments when used as fillers for paper and paperboard.  In accordance with this invention, a bulked hydrous kaolin clay paper filler is prepared by adding a water soluble cationic organic material such as a polyamine or a quaternary ammonium polyelectrolyte, in amount in excess of that required to flocculate the kaolin, but insufficient to redeflocculate the previously flocculated kaolin.
Patent CA-2030321-A1 (CA)
Title: Method for removing hydrogen fluoride from mixtures comprising aromatic ketones
Inventor: CURTIS THOMAS A
IPC: C07C51/60
Filed: 1990-11-20
Abstract: A method is provided for separating hydrogen fluoride (HF) from a mixture comprising HF complexed with an aromatic ketone in which the keto carbon atom is directly bonded to an aromatic ring carbon atom, e.g., 4-isobutylacetophenone, by adding a carboxylic acid anhydride, e.g., acetic anhydride, to the mixture while maintaining the mixture at conditions sufficient to sustain a reaction between the anhydride and the HF to form the corresponding acyl fluoride, e.g., acetyl fluoride,  and carboxylic acid, e.g., acetic acid, and separating the acyl fluoride from the mixture. The method is conveniently carried out in a stripping column near the top of which the mixture comprising aromatic ketone and HF is fed and below which the anhydride is fed. Between these feed points, the uncomplexed HF is stripped from the mixture, while below the anhydride feed point or points, the anhydride reacts with the complexed HF to form the acyl fluoride which is stripped from the mixture, and the carboxylic acid. The separation method may be integrated with the production of the aromatic ketone by the Friedel-Crafts acylation of an aromatic compound e.g., isobutylbenzene with an acyl fluoride, a carboxylic acid anhydride, a free carboxylic acid, or a mixture of the foregoing reactants, using an excess of HF as catalyst, to produce the mixture comprising aromatic ketone and HF to be separated, and to which the separated HF and in some cases the acyl fluoride may be recycled.
Patent CA-2030565-A1 (CA)
Title: Method and apparatus for product monitoring using a magnetic field
Inventor: THOMAS NEIL E
IPC: G01V3/10
Filed: 1990-03-29
Abstract: A method, of monitoring a series of products, of the kind in which the presence of foreign bodies in the product being monitored is detected by the characteristic magnetic field phase difference each material exhibits, is characterised in that the sig-nal generated by a satisfactory product having no foreign body it is used as the datum for judging whether the next subsequent product is free from a foreign body or not.
Patent CA-2034416-A1 (CA)
Title: Suture retainer
Inventor: LEARY CRAIG W
IPC: A61L17/00
Filed: 1991-01-17
Abstract: ABSTRACT OF THE DISCLOSURE  A suture retainer is provided with an arrangement of suture-retaining tabs of complex configuration and needle-retaining tabs of a number and distribution which enable the retainer to accommodate any one of several types of combined surgical suture-needle devices.
Patent CA-2034988-A1 (CA)
Title: Eye drop applicator
Inventor: BAUER GEORGE C
IPC: A61F9/00
Filed: 1991-01-25
Abstract: ABSTRACT OF THE DISCLOSURE An improved eye drop applicator is provided for an eye dropper vial consisting of a cup having a lip portion to fit around an eyeball to keep the eye lid open. A sleeve has an internally threaded passageway extending from the apex of the cup. The internally threaded passageway is removably connected to an externally threaded neck of the eye dropper vial. The user can squeeze the eye dropper vial to direct an eye drop from a nozzle of the eye dropper vial onto the center of the eyeball.
Patent CA-2035594-A1 (CA)
Title: Use of retinoids to minimize skin damage
Inventor: SHANNON RONALD J
IPC: A61P3/02
Filed: 1991-02-04
Abstract: ABSTRACT     THE USE OF RETINOIDS TO MINIMIZE SKIN DAMAGE       Pretreating areas of the body susceptible to the formation of pressure sores or ischemic ulcers with retinoids reduces the likelihood of such sores or ulcers occurring.  Similarly, skin stripping caused by the removal of adhesives can be reduced by pretreating with retinoids.  The retinoids can be formulated into a cream, ointment, lotion or hydrogel formulation or can be incorporated into the adhesive layer of a bandage or dressing or located at the skin contacting adhesive surface and adjacent strata of a bandage or dressing.
Patent CA-2038782-A1 (CA)
Title: Van body construction and assembly
Inventor: MARTIN ROGER J
IPC: B62D33/04
Filed: 1991-03-21
Abstract: ABSTRACT     A van body in which the upright wall seats comprise an outer skin in the form of a fibreglass laminate, a oriented strand board mounted to the outer skin and a moisture proof barrier coating on the inner face of the board.  The method of assembling the van body includes the steps of forming an outer skin by applying a coating of fibreglass reinforced resin to the walls of a mould to form a pair of oppositely disposed side walls, a front wall and a ceiling which are integrally connected.  A sheet of oriented strand board is then applied to each side wall and to the front wall of the outer skin before the skin is cured and removed from the mould such that subsequent curing of the skin serves to bond each board to the inner surface of the skin.  A floor is then attached to the front and side walls.  The floor is supported by the floor joints of the chassis and has portions of its width that project laterally outwardly from the floor joists.  A beam is mounted on And extends transversely of the back end of the floor joists and projects laterally outwardly from opposite sides thereof.  The beam underlies and supports the back end portion of the side walls and the front wall is attached to the cab such that the side walls serve to support the portions of the floor board that project laterally outwardly from the floor joists.
Patent CA-2038923-A1 (CA)
Title: Handle and timer assembly for a barbecue grill
Inventor: KOZIOL WALTER
IPC: A47J37/07
Filed: 1991-03-22
Abstract: A handle and timer assembly for a barbecue grill wherein the time that a cooking operation is taking place can be readily ascertained and is integrally mounted with a handle for opening the cover of the barbecue grill.  The timing mechanism is preferably of a spring winding type and is mounted on the handle at a location spaced from the attachment to the grill.  This not only affords a timing mechanism for cooking in conjunction with the grill wherein heat transfer to timing mechanism is kept to a minimum but also prevents the timing mechanism from being misplaced or inadvertently dropped as well as not being subjected to excessive heat.
Patent CA-2041005-A1 (CA)
Title: Process for the production of sodium dichromate
Inventor: LOENHOFF NORBERT
IPC: C01G37/14
Filed: 1991-04-23
Abstract: ABSTRACT OF THE DISCLOSURE           The invention relates to a process for the production of sodium dichromate and sodium dichromate solu-tions by oxidative roasting of chrome ores under alkaline conditions, leaching of the furnace clinker obtained with water or an aqueous chromate-containing solution, adjust-ment of the pH to from 7 to 9.5, removal of the insoluble constituents by filtration, a sodium monochromate solution being obtained, conversion of the monochromate ions of this solution into dichromate ions by acidification and crystal-lization of sodium dichromate by concentration of this solution, characterized  in  that  the  acidification  is carried out with carbon dioxide under pressure with removal of sodium hydrogen carbonate, the remaining solution is then very largely freed from sodium monochromate by cooling to a temperature below 10°C and filtration, any monochro-mate ions still present in the remaining solution are con-verted into dichromate ions by addition of an acid and the sodium monochromate filtered off is added to the sodium monochromate solution before conversion with carbon dioxide into a sodium dichromate solution.            Le A 27 685
Patent CA-2041520-A1 (CA)
Title: Vertically downwards propagating pillar working
Inventor: SEPPANEN PENTTI S
IPC: E21C41/22
Filed: 1991-04-30
Abstract: The invention relates to a cut-and fill method of a mine, where the working is done by pillar working, which propagates verti-cally downwards. The working is done by placing the stope and the pillars interlaced with each other when propagating downwards. The pillars are made by the hardening fill-method and likewise, at the bottom of the excavated stope, in the lower corners, a bed of hardening fill is made.
Patent CA-2042757-A1 (CA)
Title: Method and plant for measuring the solid volume of a load, such as a load of timber
Inventor: LINDBERG EBBE
IPC: G01F22/02
Filed: 1991-05-16
Abstract: A method for measuring the solid volume of a load of timber comprises the steps of introducing the load into a compartment which is hermetically sealable against the ambient atmosphere and located in a housing into which is gradually introduced a fill-out means intended to reduce the volume, and thus increase the pressure, of the gas in said compartment; determining, after at least a certain excess pressure has been established in said compartment, the product of gas volume and gas pressure as a first reference value; and measuring the solid volume of the load as the difference between said first reference value and a second reference value of the product of gas volume and gas pressure, determined under identical conditions, but with no load in said compartment. The load is introduced into the housing on a goods vehicle, more precisely through a hermetically sealable gate of the housing, and is left on said vehicle while the first reference value is being determined, whereupon the vehicle is removed from the housing through a hermetically sealable gate.
Patent CA-2043593-A1 (CA)
Inventor: BAIRD HENRY S
IPC: G06V10/774
Filed: 1991-05-30
Abstract: Apparatus and methods for generating a set of defective images from a model image. Defect parameters used with the apparatus and methods specify classes of defectsincluding resolution, blur, threshold, speckle, jitter, skew, distortion of width and height, offset from a baseline, and kerning The parameters further permit specification of a range of sizes of the defects and a distribution of the defects within the range. Within the apparatus, actual values for the defects are generated randomly within the specified ranges and distributions. The model image may be represented by means of pixels or by a format which describes the model image's shape. The user may specify the number and the size of the defective images. The defective images are useful for inferring accurate and efficient image classifiers for use in image recognition devices such as optical character readers.
Patent CA-2044185-A1 (CA)
Title: Flotation column deinking of paper during recycling
Inventor: CHAMBLEE WAYNE
IPC: D21C5/02
Filed: 1991-06-10
Abstract: ABSTRACT      Deinking of paper having print during the production of recycled paper is accomplished by using a flotation column.  A finely comminuted fibrous suspension having a consistency of about 1-8% is introduced into a first vertical column to flow downwardly.  The suspension passes through a sharp-edge orifice and just below the orifice air (substantially atmospheric or pressurized) is sucked into the suspension and entrained in it.  This forms a downwardly moving foam bed.  The suspension with entrained air passes from the open bottom of the first column into a second column to form a suspension/froth interface in the second column.  Ink particles in the suspension attach to the air bubbles and are entrained in the froth.  The froth with entrained ink particles is removed from the top of the second column and a suspension substantially free of ink particles is removed from the bottom of the second column, and is preferably deaerated.  The sharp edge orifice is preferably circular in configuration with about a 1/2 - 2 inch diameter.
Patent CA-2044850-A1 (CA)
Inventor: NAKAGAMI KOUICHI
IPC: G01C19/72
Filed: 1991-06-18
Abstract: In a fiber optic gyro which is constituted by a negative feedback loop in which the phase difference between right-handed light and left-handed light propagating through an optical fiber coil is detected from their interference light and a ramp wave of a frequency corresponding to the detected phase difference is generated by a ramp generator and is applied to a feedback phase modulator to reduce the phase difference between the right-handed light and the left-handed light, a diagnostic signal generated by a diagnostic signal generator is applied via a combining circuit to the closed loop and the corresponding response signal is extracted therefrom.  Based on the response signal, a diagnostic unit diagnoses a fault of the fiber optic gyro.
Patent CA-2046214-A1 (CA)
Title: Pressurised fluid dispenser
Inventor: SCHEUBLE GUSTAV A
IPC: A61M1/00
Filed: 1991-07-04
Abstract: ABSTRACT       A pressurised fluid dispensing apparatus comprising a reservoir fillable through a closable circular port and being adapted to receive a plunger means and communicating with first check valve means for providing compressed air to dispense fluid from said reservoir through a filtered discharge channel, said channel being connected to second check valve means disposed in said fluid placement device to regulate flow of said fluid.