baber/WOPTO huggingface dataset:
Patent CA-2021174-A1 (CA)
Title: Two row pipe diffusers with boundary layer control
Inventor: SHERIKAR SANJAY V
IPC: F04D29/44
Filed: 1990-07-13
Abstract: ABSTRACT OF THE DISCLOSURE    A diffuser for a radial flow compressor includes a pair of coaxial  rings, the second of which closely surrounds the first.   A set of intersecting flow passages extends through the first  ring, and  another aligned  set of  flow passages extends through  the second  ring.  In a first embodiment of the invention,  a circumferential  groove is  formed between the two  rings, thus  allowing low momentum fluid to migrate from the pressure side of one passage to the suction side of a neighboring  passage and  to prevent boundary layer build-up.   In a second embodiment of the invention,  the passages are arranged  in a  double cone  configuration which  allows higher diffuser  levels than  are attainable  in a straight cone diffuser of equal length.
Patent CA-2021368-A1 (CA)
Inventor: MENDE TAKAYUKI
IPC: D04H11/08
Filed: 1990-07-17
Abstract: This invention provides a bulky nonwoven fabric made of thermoplastic resin filaments, which is soft and highly permeable to water and gas and effectively absorbs moisture as well as shocks.      A nonwoven fabric according to the invention is made of fiber-like filaments of a thermoplastic resin material and comprises a base cloth layer made having densely distributed holes and a large number of cylindrical projections, each standing from the peripheral edge of one of the holes and made of fiber-like filaments similar to those of the base cloth layer and soft, its height being at least twice as large as the thickness of the base cloth layer.      The method of manufacturing a nonwoven fabric of the invention is characterized in that molten filaments are blown out of a melt-blow die onto a porous plate provided with a large number of air passage holes under a condition where ambient air pressure on the side of the plate facing the die is kept higher than the air pressure on the other side of the plate so that some of the filaments project outside from the air passage holes to form so many cylindrical projections due to the difference of pressure, the aggregate of filaments being then taken away from the porous plate. The method can comprise a film laminating step.
Patent CA-2024903-A1 (CA)
Title: Enhanced production of ethylene from higher hydrocarbons
Inventor: LEYSHON DAVID W
IPC: C07C6/04
Filed: 1990-09-07
Abstract: The present invention provides a process for the preparation of ethylene from C4 or higher feed by a combination of cracking and metathesis wherein higher hydrocarbon is cracked to form ethylene and propylene and at least a portion of the propylene is metathesized to ethylene.
Patent CA-2029362-A1 (CA)
Title: High impact mint flavor for high base chewing gum
Inventor: BARCELON SHIRLEY A
IPC: A23G4/00
Filed: 1990-11-06
Abstract: ABSTRACT    An improved, reduced calorie, high base content chewing gum composition possesses a greater, more intense initial flavor impact of increased duration.  The method of preparation utilizes highly fractionated or rectified flavor oils from which are removed the terpene and sesquiterpene components resulting in an enhanced and sustained flavor release from the gum base.  The deterpenated oils have a lesser affinity for the gum base allowing for the use of higher gum base levels for the reduction of calories without the flavor oils being trapped therein.  The sustained flavor release is also improved by the complete or partial renewal of several bitter tasting components previously associated with the oils.     DA8K8004.DOC 11/1/89 30
Patent CA-2030368-A1 (CA)
Title: Light-emitting diode having light reflecting layer
Inventor: KATO TOSHIHIRO
IPC: H01L33/44
Filed: 1990-11-20
Abstract: A light-emitting diode having a light-generating layer for generating an electromagnetic radiation by electroluminescence, a light-emitting surface through which the radiation is emitted, and a light-reflecting layer remote from the light-emitting surface, for reflecting a portion of the radiation toward the light-generating layer so that the radiation reflected by the light-reflecting layer is also emitted through the light-emitting surface.      The light-reflecting layer consists of two or more interference type reflecting layers which includes one or more reflecting layer each capable of most efficiently reflecting a wave whose wavelength is longer than the nominal wavelength of the radiation. The light-emitting surface may have irregularity for irregularly reflecting the radiation, or an anti-reflection layer formed thereon by deposition.
Patent CA-2031048-A1 (CA)
Title: Method for laying down tapes
Inventor: DRIVER HOWARD D
IPC: B29C41/32
Filed: 1990-11-28
Abstract: TITLE Method for Laying Down Tapes ABSTRACT An ordered staple fiber/resin tape is steerable during tape laydown by applying sufficient heat and back tension to the tape before laydown to maintain the ordered staple fibers in tension across the width of the tape.     J.25
Patent CA-2033361-A1 (CA)
Title: Needle-mounted hypodermic needle guard
Inventor: SIRCOM RICHARD
IPC: A61M5/158
Filed: 1990-12-28
Abstract: A needle-mounted needle guard that automatically engages with the needle when slid to a tip-covering position may be laterally installed on a needle. Such a device may also be used in a catheter wherein the guard is automatically deposited at the needle tip.
Patent CA-2034623-A1 (CA)
Title: Photoimageable compositions containing fugitive colorants
Inventor: TARA MING
IPC: G03F7/105
Filed: 1991-01-21
Abstract: PHOTOIMAGEABLE COMPOSITIONS CONTAINING FUGITIVE COLORANTS               ABSTRACT OF THE DISCLOSURE A photoimageable composition used for forming a solder mask on a printed circuit board contains a fugitive dye which can be rendered colorless by heat and/or UV radiation after a layer of the photoimageable composition has been exposed to patterned actinic radiation and developed.                             -??-
Patent CA-2036346-A1 (CA)
Title: Coating compositions stabilised against light, heat and oxygen
Inventor: VALET ANDREAS
IPC: C08K5/41
Filed: 1991-02-14
Abstract: Coatin compositions stabilised against light, heat and oxygen o-Hydroxyphenyl-s-triazines of formula I    wherein n is 1 or 2 and R1 to R7 are as defined in claim 7, are good light stabilisers for coating compositions which contain a basic curing catalyst. In contradistinction to other UV absorbers, they do not cause discolourations in the presence of such catalysts.
Patent CA-2037494-A1 (CA)
Inventor: FUJII YASUO
IPC: G03G15/16
Filed: 1991-03-04
Abstract: A transfer unit has a plastic end block at each end.  The end block includes a bearing for supporting an auxiliary roller,  and an arm having at its end portion a pivot received by a lower casing.  The bearing and the arm are formed integrally with the end block.  A leaf spring located under the transfer unit supports it along with the roller in movable around the pivot.  When an upper casing is shut down, a photoreceptor drum sup-ported in the upper casing pushes down the transfer unit against the elastic force of the leaf spring.  Since the positions of the transfer unit and the roller are deter-mined with respect to the photoreceptor drum, good duplicativity can be obtained.  In this state, roller means serves to secure a predetermined space between the photoreceptor drum and the auxialiary roller.
Patent CA-2037573-A1 (CA)
Title: Primary/detonator compositions suitable for use in aluminum cups
Inventor: RAMASWAMY COODLY P
IPC: C06B33/06
Filed: 1991-03-05
Abstract: ABSTRACT OF THE DISCLOSURE          The invention is directed  to  a  primary/detonator composition suitable for use in an automobile airbag system.  The composition may safely be housed in aluminum support structures (a/k/a cups).
Patent CA-2038996-A1 (CA)
Inventor: ALLEN ROBERT B
IPC: C04B7/36
Filed: 1991-03-25
Abstract: A low-permeability barrier for waste disposal sites such as landfills and waste lagoons, and a method for constructing the same, includes a waste material.  The waste material is stabilized to decrease the permeability characteristics of the waste material and may be further processed to improve the structural characteristics of the waste material and to prevent leaching of any leachable components.  A method is provided for applying the waste material to the waste disposal site as a liner, interim cover, and/or final cover.
Patent CA-2040270-A1 (CA)
Title: Process for preparing ¹-caprolactone
Inventor: INABA YUKIO
IPC: C07B61/00
Filed: 1991-04-24
Abstract: ABSTRACT OF THE DISCLOSURE          Disclosed is a process for preparing .epsilon.-caprolactone comprising using a percarboxylic acid solution obtained by oxidizing organic carboxylic acid in an organic solvent in the presence of hydrogen peroxide and a boric acid catalyst, and cyclohexanone, supplying 1 to 1.5 mole of percarboxylic acid, 0.012 mole or less of hydrogen peroxide and 0.04 mole or less of the boric acid catalyst per mole of cyclohexanone in a reaction system, and reacting said cyclohexanone with said percarboxylic acid to form .epsilon.-caprolactone.
Patent CA-2040967-A1 (CA)
Title: New system for reducing bod value in used water
Inventor: RADU GEORGES M
IPC: C08G65/00
Filed: 1991-04-23
Abstract: THE NEW SYSTEM FOR REDUCING BOD VALUE       IN USED WATER                               ABSTRACT          This  invention  relates  to  a  completely  new  polymer  for  this application, that can be used alone or with an enhancer, to reduce BOD value  in used water,  mainly for  pulp  and  paper  industry, mining industry, municipalities, etc.          This invention relates to all non ionic polyethylene oxide types.          By reducing BOD value using a polymer, it is possible to obtain extraordinary results. The BOD value can  be  reduced  by  10-60% depending on the type of polyethylene oxide and the enhancer used.
Patent CA-2041603-A1 (CA)
Inventor: NIELSEN DAVID L
IPC: B29C53/30
Filed: 1991-05-01
Abstract: A corrugated elastomeric tube having a Smooth interior surface (28) generally free from nipples can be produced by a novel process. A first step in the process is carried out by positioning an unvulcanized elastomeric tubing (14) over a mandrel (12) having a corrugated outer surface (23). The mandrel (12) has an exterior surface (30) which is free from holes. Next, each end of the tubing (14) is clamped to the mandrel (12). The tubing (14) and the mandrel (12) are heated to soften and vulcanizing the tubing (14). Also, pressure is provided to cause the tubing (14) to conform with the corrugated outer surface (13) of the mandrel (12). The vulcanized corrugated tube is then removed from the mandrel (12).
Patent CA-2045446-A1 (CA)
Title: Flotation Machine
Inventor: ZLOBIN MIKHAIL N
IPC: B03D1/14
Filed: 1991-06-25
Abstract: A flotation machine comprises a cylindrical chamber having a tapered bottom to which there are secured a pipe for feeding a flotation pulp carrying mineral particles of fine fraction and a pipe  for discharging  gangue. Secured  to  the  walls  of  the chamber is a trough for collecting froth concentrate, and  a  group  of  pulp  aerators,  whereas  positioned axially inside  the  chamber  is  a  group  of  tapered shells  spaced equidistantly  from one  another  with bases of larger diameter thereof facing the top part of  the  chamber  and  resting  substantially  at  one tapered surface.  Positioned over  the  chamber  is  a means  for  feeding  mineral  particles  of  coarse fraction in the form of a hydrocyclone, a cylindrical casing  of  this  hydrocyclone  having  a  pipe  for evacuating the  liquid phase of the  flotation pulp positioned tangentially and communicating with  the pipe for feeding the flotation pulp carrying mineral particles of fine fraction.
Patent CA-2045741-A1 (CA)
Inventor: PETTIFER DONALD A
IPC: B23B5/16
Filed: 1991-06-26
Abstract: An apparatus (10,100) for counterboring a pipe is attached to a pipe end surfacing machine (12) and is comprised of a frame (14) pivotally mounted to a flywheel (16).  A cutting tool (50) and guide wheel (72) are attached to said frame (14).  Means (91) for positioning the frame so as to locate the guide wheel (72) and cutting tool (50) relative to the pipe for machining is connected between said flywheel and said frame.  In operation, the apparatus (10,100) is inserted into said pipe and the cutting tool (50) is positioned to contact the inner surface of the pipe adjacent the end of said pipe.  The flywheel is activated and rotates, thereby rotating the cutting tool (50).
Patent CA-2045957-A1 (CA)
Title: Integrally belted absorbent products
Inventor: DAVIS MARTHA
IPC: A61F13/64
Filed: 1991-07-05
Abstract: ABSTRACT            Absorbent products having integral belt means for retaining the absorbent product in a position to absorb body fluids are disclosed.  In a preferred embodiment, a napkin is provided wherein straps are cut from the material of the napkin.  These straps are then tied around the body of the user when the napkin is applied.  The straps are flexible enough to allow them easily to be tied to each other on the side.  The straps may or may not be retained by the waistband of an undergarment. Alternatively, a second embodiment is provided wherein long flap-like straps extend longitudinally away from the transverse ends of the absorbent product.  These straps are then engaged by the elastic waistband on an undergarment, to retain the napkin in place.  Methods of manufacturing absorbent products are also disclosed. 0636u
Patent CA-2048014-A1 (CA)
Inventor: KOMATSUBARA MICHIRO
IPC: H01F1/16
Filed: 1991-07-26
Abstract: A method of manufacturing an oriented silicon steel sheet which achieves a high magnetic flux density while reducing the core loss.   A silicon steel sheet containing Al and Sb as inhibitor components is cold-rolled once or a plurality of times. During cooling for annealing before final cold rolling, a small strain is created on the sheet and the temperature is within a certain range. Carbide precipitation is suitably controlled to precipitate carbides comparatively coarsely in grains.
Patent CA-2048865-A1 (CA)
Title: Two-way outdwelling slit valving of medical liquid flow through a cannula and methods
Inventor: ROBERT HARVEY
IPC: A61M39/22
Filed: 1991-08-09
Abstract: A novel cardiovascular outdwelling, normally closed, pres-sure-responsive slit valve liquid flow control and related methods wherein a diaphragm having a slit therein is flexed distally by hydrostatic pressure and proximally by negative pressure at different points in time to selectively open the slit and accommodate the flow of IV solution to a medical patient through a cannula and blood sampling from the cardiovascular system of the patient through the cannula in such a way as to prevent bleed-back and clotting of blood within the cannula.
Patent CA-2049641-A1 (CA)
Inventor: OHKUMA SABUROH
IPC: H03G5/02
Filed: 1991-08-21
Abstract: The present invention relates to an acoustic circuit for correcting a sound field characteristic. A frequency characteristic of regenerated sound is made flat over as a wide frequency range as possible and a phase characteristic is adapted to match the characteristic of the sound field in which regenerated sound is obtained by eliminating phase distortion so that the regenerated sound is brought close to natural sound extremely.         The present invention realizing such characteristics includes an equalizer circuit having a medium frequency and high frequency correction circuits having a characteristic that a phase of an input aural signal advances as a frequency of the aural signal is increased in a higher frequency range than the vicinity of 1 KHz and a circuit constant which advances a phase of the frequency from about 1 KHz to 5 KHz relatively in order to attain far and near feeling, and a low frequency correction circuit having a characteristic that a phase of the input aural signal is delayed as the frequency of the aural signal is lowered in a lower frequency range than about 1 KHz and a circuit constant having a reverse characteristic to a peak of a resonance frequency of the sound field to be regenerated, the medium, high and low frequency correction circuits being connected one another. Further, the present invention includes a high fidelity regenerative amplifier provided with the equalizer circuit connected to a phase correction circuit for correcting a phase characteristic of an amplifier circuit for amplifying regenerated sound with high fidelity over a wide frequency range and an acoustic characteristic correction circuit in the high fidelity regenerative amplifier having an impedance conversion circuit connected to the equalizer circuit to convert an impedance of the equalizer circuit to a proper value.
Patent CA-2052434-A1 (CA)
Inventor: MARCINYSHYN BRUCE J
IPC: B66D5/00
Filed: 1991-10-01
Abstract: A braking system for mine hoists allows for primed braking while simultaneously meeting mandated deceleration rates. A series of two position valves act to dampen debilitating hoist vibrations and bring the conveyances to safe, smooth stops in emergency.
Patent CA-2062451-A1 (CA)
Title: Method for debriefing multi aircraft operations
Inventor: VAX HANAN
IPC: G09B19/16
Filed: 1992-03-06
Abstract: A B S T R A C T    The present invention relates to a method for debriefing aircraft A/C operations.  Said method comprises forwarding selected flight data obtained, e.g. from a suitable GPS receiver, collected on the aircraft computer to a monitoring device, encoding from said monitoring device the digital data by an Asynchronous protocol, e.g. RS-232 protocol, onto the cassette of the AVTR and thereafter subjecting the cassette on the ground to a data reduction process, thus obtaining a display file.    The GPS receiver is, for example, a commercial code receiver which may be connected to one antenna only.  The data received from the GPS receiver are being forwarded to said monitoring device, encoded simultaneously with the other flight data and, by the same method, correcting on the ground in the course of the reduction process  the Inertial Navigation System (INS) position drifts.    Differential GPS technique may be used on the ground.  Several individual display files may be syunchronized into a single display file.
Patent CA-2069641-A1 (CA)
Inventor: SLUGA ROBERT M
IPC: B08B3/08
Filed: 1991-10-10
Abstract: Une méthode pour conserver un solvant inflammable dans un environnement ininflammable consiste à couvrir le solvant inflammable avec une atmosphère de vapeur ininflammable fournie par un solvant ininflammable, de telle manière que les vapeurs des solvants inflammable et ininflammable forment un mélange gazeux ininflammable dans cette atmosphère. Une telle méthode est utilisée pour l'élimination à la fois des contaminants à base de pétrole et polaires pour contrôler l'inflammabilité d'un solvant alcoolique. Un appareil (10) pour nettoyer des objets à l'aide de solvants fluorocarbonés et alcooliques comprend une chambre (20) dotée de plusieurs compartiments (26, 28, 30) pour confiner les solvants et un espace de vapeur clos (24). Au moins un des compartiments contient un composé fluorocarboné liquide et au moins un autre contient de l'alcool liquide. Les solvants se volatilisent dans l'espace de vapeur clos (24) pour fournir une atmosphère de vapeur ininflammable au-dessus des compartiments contenant l'alcool (28). L'alcool volatilisé est mélangé avec le composé fluorocarboné volatilisé pour former un mélange ininflammable qui est purifié et séparé, et le composé fluorocarboné récupéré peut être réutilisé dans les activités de nettoyage subséquentes.
Patent CA-2069789-A1 (CA)
Title: Polyether polyamino methylene phosphonates for high ph scale control
Inventor: CHEN SHIH-RUEY T
IPC: C08L71/02
Filed: 1992-05-28
Abstract: Polyether polyamino methylene phosphonates possess high calcium tolerance and have been found to give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, under severe conditions which include elevated pH, high dissolved solids content, and high saturation levels of calcium carbonate.
Patent CA-2073066-A1 (CA)
Inventor: OFFERS ALBERT G
IPC: H04M9/00
Filed: 1991-03-27
Abstract: Un système téléphonique à poussoirs (120), doté de ports (22) pour le raccordement aux lignes téléphoniques d'un central et de ports (12) pour le raccordement de dispositifs terminaux, y compris de postes téléphoniques à poussoirs (125), peut distinguer si un appel projeté ou l'accès à une fonction implique plus que le système proprement dit. En l'occurrence, un protocole de signalisation du central est émulé pour le dispositif terminal et transmis sur l'une des lignes téléphoniques, ce qui permet à l'appel ou à l'accès de se poursuivre comme si un utilisateur du dispositif terminal avait demandé le protocole de signalisation du central.
Patent CA-2073585-A1 (CA)
Title: Meltdown die head
Inventor: KOENIG ROBERT J
IPC: B29C48/05
Filed: 1992-07-10
Abstract: MELTBLOWN DIE HEAD            Abstract of the Disclosure There is disclosed a meltblown die head having a heated gas reservoir extending the length of the die head. The heated gas used in the meltblowing process is introduced into the reservoir and serves as a heat source for maintaining the temperature of the polymer and maintaining a uniform temperature of the die assembly during the meltblowing process.
Patent CA-2074335-A1 (CA)
Title: Naphthylamine polycarboxylic acids
Inventor: CARTER CHARLES G
IPC: C07C309/47
Filed: 1992-07-21
Abstract: ABSTRACT OF THE INVENTION      A composition useful for treating aqueous systems comprising a naphthylamine polycarboxylic acid having the formula:       wherein X is CO2H or SO3H, Y is H, C1 to C6 alkyl, CO2H or SO3H, R is H, C1 to C6 alkyl, CO2R' or COR', R' is C1 to C6 alkyl, n is an integer from 1 to 20, and water soluble salts thereof.
Patent CA-2075241-A1 (CA)
Title: Handle for manipulating a laparoscopic tool
Inventor: GERRY STEPHEN W
IPC: A61B17/28
Filed: 1992-08-04
Abstract: ABSTRACT OF THE DISCLOSURE     A handle for a laparoscopic instrument is provided for manipulating a distal laparoscopic tool. The handle includes a casing, a pivot handle pivotally attached to the casing, and an actuating shaft mechanism extending outward from the casing. Attached at the distal end of the actuating shaft opposite the casing is the laparoscopic surgical tool. The actuating shaft mechanism is longitudinally movable in a first direction by a pivotal movement of the pivot handle for manipulating the laparoscopic tool. A detent carried by the casing allows movement of the shaft longitudinally in the first direction while restraining longitudinal movement of the shaft in a second opposite direction. A thumb wheel attached to the actuating shaft mechanism allows the actuating shaft mechanism to be rotated for further manipulating the laparoscopic tool.
Patent CA-2081365-A1 (CA)
Inventor: IDLEMAN THOMAS E
IPC: G06F11/10
Filed: 1991-02-28
Abstract: A method and apparatus for controlling data flow between a computer (10) and a group of memory devices (18A-18F) arranged in a particular logical configuration. The system includes a group of first level controllers (12A,12B) and a group of second level controllers (14A, 14B). The first level controllers and the second level controllers work together such that if one of the second level controllers fails, the routing between the first level controllers and the memory devices is switched to a properly functioning second level controller without the need to involve the computer in the rerouting process. The logical configuration of the memory devices remains constant The invention also includes switching circuitry (16) which permits a functioning second level controller to assume control of a group of memory devices formerly primarily controlled by the failed second level controller, In addition, the invention provides error check and correction (Figure 10) as well as mass storage device configuration circuitry.