baber/WOPTO huggingface dataset:
Patent CA-2080815-A1 (CA)
Title: Compact multi-stage pressure reducing valve
Inventor: GILL AJIT SINGH
IPC: F16K37/00
Filed: 1990-10-18
Abstract: A flow control and pressure reducing valve has a valve body with an inlet chamber and outlet chamber separated by a partition plate. A plurality of passages are formed in the valve body spaced circumferentially around the partition plate and have an inlet portion opening into the inlet chamber and an outlet portion opening into the outlet chamber. Elastomeric flow control means are positioned in the passages and are responsive to pressurized fluid introduced therein to control flow of fluid through the passages around the partition plate. The valve configuration allows the mounting of inlet and outlet gates within the inlet and outlet chambers to eliminate the need for separate gate valves. An auxiliary flow passage may be provided through the partition plate and flow controlled therethrough to increase the flow capacity of the valve yet still provide full flow and pressure control. Air inlet and relief valves may also be provided as an integral part of the valve.
Patent CA-2082315-A1 (CA)
Inventor: PEARSALL HAROLD I
IPC: A61M25/00
Filed: 1992-11-06
Abstract: Catheters are provided with modified distal ends  which  reduce substantially  the  trauma  to patients during placement of the catheter  of  the invention in a patient.  The distal end has a very soft-tip of  specific  range of  length to  provide proper  control  without  trauma  during  placement. Moreover, the very soft tip has a rounded front end to eliminate any sharp edges for insertion in the patient.  The invention includes a specific method in which the catheter body and soft tip are formed separate and comprised of very soft Shore A hard-ness ranges,  and joined together by melt-bonding with RF bonding to minimize  the  extent  the  two parts  are  subjected  to  melting,  and  therefore minimize surface blemishes at the joint,  again to reduce trauma.  The rounded front or distal end of the tip may be formed before or after bonding by introduction into a mold for that purpose.
Patent CA-2082878-A1 (CA)
Inventor: ARSENAULT JEFF
IPC: F02B43/00
Filed: 1992-11-13
Abstract: DUAL FUEL ELECTRONIC CONTROL SYSTEM     Abstract of the Disclosure A dual fuel system for a diesel engine includes a liquid (diesel) fuel injection system controlled by an engine electronic control unit (ECU) and a source of gaseous fuel such as natural gas.  A metering valve and a mixer controls introduction of gaseous fuel from the natural gas fuel source into combustion air for the engine.  An electronic governor controls the metering valve and a link controller coordinates operation of the ECU and the governor.  Preferably, a regulator regulates the natural gas pressure supplied to the metering valve.  A shut-off valve controls communication of natural gas between the source and the regulator.  The link controller also controls the shut-off valve as a function of sensed conditions.
Patent CA-2085293-A1 (CA)
Inventor: EUMURIAN GREGOIRE
IPC: H04B10/60
Filed: 1992-12-14
Abstract: 13 CIRCUIT D'AUGMENTATION DE LA DYNAMIQUE POUR UN CANAL DE TRANSMISSION D'UN SIGNAL ANALOGIQUE FUGITIF A LARGE BANDE ET APPLICATION A UN DISPOSITIF DE TRANSMISSION OPTIQUE DE PLUSIEURS SIGNAUX FUGITIFS L'invention concerne un circuit d'augmentation de la dynamique pour un canal de transmission d'un signal analogique fugitif à large bande et son application à un dispositif de transmission optique de plusieurs signaux fugitifs. Ce circuit comprend, après un amplificateur (1), une voie directe (Vo1) et des voies retardées et atténuées. La deuxième voie (Vo2) comprend un atténuateur (2) d'atténuation K1 et une ligne à retard (LRe1) de durée T1 égale à la durée du front de montée rapide du signal fugitif. Chaque voie suivante (Vo3) est reliée à la sortie de la voie précédente et comporte aussi un atténuateur (3) et une ligne à retard (LRe2) de durée T1. Un multiplexeur (4) commandé par un circuit (5) multiplexe dans le temps les fronts de montée du signal fugitif avec des atténuations K1, K1K2 etc ... L'invention s'applique notamment à la transmission de plusieurs signaux fugitifs à grande dynamique. Figure 3
Patent CA-2085728-A1 (CA)
Title: Reception of orthogonal frequency division multiplexed signals
Inventor: GLEDHILL JEFFREY JOHN
IPC: H04L27/38
Filed: 1991-09-13
Abstract: ABSTRACT                 RECEPTION OF ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED SIGNALS         In an OFDM signal individual OFDM carriers are modulated by samples of signals which can only take a limited range of allowed values and a block of samples modulates the group of carriers during a time period T.  In a receiver, the signal modulating an individual OFDM carrier may be demodulated by estimating the position of reference axes serving as the frame of reference against which the allowed modulating values are defined, and multiplying the value of the demodulated samples by the complex conjugate of a point on one of the estimated reference axes.  The spread of the groups of samples demodulated from each OFDM carrier gives an indication of whether the receiver is synchronised to the block boundaries.  Preferably spread of the complex samples is evaluated in the radial direction only and used to steer the sample clock frequency.  Phase drift of the demodulated samples from one block to the next indicates the degree of local oscillator frequency error.  Preferably phase drift is assessed by multiplying complex values by the complex conjugate of an earlier sample demodulated from the same OFDM carrier and using the resulting measure to steer the local oscillator frequency via a frequency locked loop.
Patent CA-2086460-A1 (CA)
Title: Periodontal toothbrush
Inventor: COLSON EDWARD L
IPC: A46B9/04
Filed: 1992-12-30
Abstract: ABSTRACT OF THE DISCLOSURE    A toothbrush which is anatomically designed and constructed to effectively and efficaciously remove plaque or calculus from the inaccessible interproximal spaces between adjacent teeth, and at the same time gently massage the gingiva and effectively clean the teeth.    The  toothbrush  includes  a  unique  and  novel  bristle arrangement at one end of an offset handle.   The bristles are arranged in tufts embedded in and anchored to a toothbrush head which is integrated with the handle in a conventional manner.  The bristle tufts being arranged in twelve transverse or lateral rows with each transverse row including four tufts of bristles except for the outermost transverse row which includes only two tufts of bristles.  The odd numbered transverse rows of tufts of bristles are all the same length and the even numbered transverse rows of tufts are of a length less than the odd numbered transverse rows of tufts.  The even numbered trans-verse rows of tufts progressively increase in length with the even numbered transverse rows of tufts at the outer end portion of the brush head having a shorter dimensional length than the even numbered transverse rows oriented inwardly toward the handle.  All the bristles and tufts are rounded to prevent injury to the gingival gum area.  The other end of the handle is provided with an accessory brush in the form of a tuft of bristles to reach areas which may require individual additional or special attention due to teeth positioning and is especially useful for removing food debris and plaque from gingival pockets to assist in preventing periodontal disease.
Patent CA-2089872-A1 (CA)
Title: System for using telephone cards
Inventor: HAKAMADA IKUHIRO
IPC: G07F9/00
Filed: 1992-03-09
Abstract: ABSTRACT OF DISCLOSURE      As a calendar function is provided to a telephone card, its usefulness is enhanced.  Also, as a display part for the information printed on a surface of a telephone card is provided on an ordinary telephone set, a telephone call can be made while looking at the calendar without taking out a separate calendar.  Further, as a telephone card fixing part, a telephone card insertion slot, and a number-of-calls counting means are separated, thus constituting a telephone card  accepting  means  as  a  separate  body,  the  handling characteristics are improved and at the same time a reduction in weight of a telephone set can be achieved.  Also, as a storage box to store used telephone cards is provided within a telephone set, it contributes to a beautification of environment.
Patent CA-2089940-A1 (CA)
Title: On-line module replacement in a multiple data processing system
Inventor: DEYESSO JOSEPH P
IPC: G06F15/16
Filed: 1993-02-19
Abstract: ABSTRACT      A method for providing on-line replacement of a module which is at a specified position in an array of modules connected to a common control processor so that all other modules in the array can continue operating during the replacement operation.  When the module is removed an indication is provided to the control processor showing that removal has occurred and identifying the position thereof.  When the replacement has occurred an indication thereof is provided to the control processor, the replacement module is tested, and the state of the replacement module is updated to place it in the same state it would have been in if it had not been replaced.
Patent CA-2090355-A1 (CA)
Inventor: CHEN JIAN
IPC: C12N15/87
Filed: 1993-02-25
Abstract: The present invention relates to the field of introducing genetic material to cultured cells and into cells of animals in vivo. In particular, the invention relates to the use of receptor-targeted neoglycoprotein to carry genetic material into cells. The invention also uses nuclear-localization signals(Gerace et al. Annu. Rev. Cell Biol. 1988, 4:335-374), to facilitate the entry of genetic materials into cell nucleus for gene expression. The present invention has a wide variety of applications, for example, in treatment of genetic diseases, in study of cell biology, and in genetic interventions of physiological and pathological processes. The present invention is a effective method for introducing and expressing genes in hepatoma cells and hepatocytes in vivo. Its design has several novel features. First, this invention uses a simple coupling reagent (1-ethyl-3-(3-dimethylaminopropyl) carbodiimide) to chemically add galactose to a protein, histone, in a one step reaction. The galactosylated protein (for example, albumin, histone and any other protein) has high affinity for the ASGP receptor; Second, the invention uses a protein which is a natural DNA-binding protein; Three, this invention uses a protein which crosses the membranes of cell nucleus by a facilitated process in addition to simple diffusion. This feature contributes greatly to the high level expression of the introduced foreign genes; Last, the galactosylated histone 1 is the physical embodiment of all the features in this invention. This means this gene delivery system has only one component and is simple, reliable, and efficient from engineering-design point of view.
Patent CA-2090468-A1 (CA)
Title: Silver recovery process
Inventor: MCGUCKIN HUGH G
IPC: G03C5/31
Filed: 1992-06-25
Abstract: A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a sil-ver recovery element (10), which comprises a substrate (12) having thereon a hydrophilic colloid layer (16) containing physical de-velopment nuclei.  The contacting is carried out for a time sufficient to reduce the silver concentration in the developer solution to a desired level. The process is useful for treating a seasoned or unseasoned photographic developer solution containing silver ions.
Patent CA-2090806-A1 (CA)
Inventor: ARCHAMBAULT BRUNO
IPC: G10K11/16
Filed: 1993-03-02
Abstract: The horn housing may comprise an inner metal shell in the shape of a hexagonal box open at one end fitting into a similarly shaped outer dense solid box similarly open at one end.  Space between the inner and the outer boxes being filled by a low density sound absorbing filler, and the inner box being connected to the outer box by vibration absorbing bolts.  The outer box is mounted to a structure by vibration absorbing mounting brackets.  When a high decibel horn or siren is mounted in the inner box to directed sound through the opening, most of the sound propagating sideways towards the structure is absorbed by the housing increasing the  comfort  level  of  passengers  or  crew  inside  the structure.
Patent CA-2092331-A1 (CA)
Title: Method and means for producing improved heat pump system
Inventor: GUNDLACH ROBERT W
IPC: F25D17/02
Filed: 1993-03-24
Abstract: ABSTRACT OF THE DISCLOSURE       There is disclosed a heat pump wherein the relatively low temperature, heat absorbing surfaces of heat pump extract heat from a low temperature heat exchanger in the form of water-immiscible fluid, and transfers the extracted heat to the relatively high temperature heat emitting surfaces of the heat pump.  To water-immiscible fluid is maintained at a temperature of virtually 0°C by the injection of many small droplets of water that freeze to form beads of ice as they settle in the fluid.  The beads can then be separated and delivered to a combined ice-water reservoir. The heat extracted from the water-immiscible fluid and the injected water droplets is replaced in the ice-water reservoir from natural heat sources, by means such as a ground loop, a solar panel or an air-water heat exchanger.  The heat provided by the ice-water reservoir includes its latent heat of fusion, which acts as a buffer when heat demand exceeds the rate of heat available from natural sources.
Patent CA-2092402-A1 (CA)
Inventor: DIRLAM JOHN P
IPC: A23K1/16
Filed: 1991-08-30
Abstract: An acidic polycyclic ether antibiotic, having structure established by X-ray crystallography, is formed by fermentation of a novel microorganism, Streptomyces sp. ATCC 55027.  This novel antibiotic is useful as an anticoccidial in poultry, in the prevention and treatment of swine dysentery and as a growth promotant in cattle and swine.
Patent CA-2094048-A1 (CA)
Inventor: COMPTON DAVID W
IPC: F41A21/26
Filed: 1993-04-15
Abstract: The invention is a blank firing attachment for use on a gas operated automatic rifle or light machine gun. The device restricts the exit of gases from the rifle barrel when a blank cartridge is fired, thus retaining sufficient gas pressure in the barrel to actuate the rifle's automatic firing mechanism and permit blank cartridges to be fired automatically or semi-automatic.      The device has a body adapted to be attached to the muzzle compensator of a rifle and a stem having an axial cavity. The stem is adapted to seal against the inner bore of the compensator.
Patent CA-2095702-A1 (CA)
Title: Ethylene/alpha-olefin copolymers
Inventor: MATSUURA KAZUO
IPC: C08F210/16
Filed: 1993-05-06
Abstract: Abstract A novel ethylene/.alpha. -olefin copolymer superior in melt characteristics such as fluidity and exhibiting high impact resistance, mechanical strength, transparency and low-temperature heat sealability is provided.       The novel copolymer is prepared by the copolymerization of ethylene and an .alpha. -olefin of 4 to 20 carbon atoms and satisfies the conditions of a melt index of 0.01 to 100, a density (d) of 0.880 to 0.940, an Mw/Mn ratio in the range of 2.0 to 15, an N value of 1.25 to 2.5, provided N value ? 1.32 log (Mw/Mn) + 0.86, a DSC melting point peak of 70° to 120°C and a branching degree, B, per 1,000 carbon atoms of -710d + 662 ?  -725d + 686.
Patent CA-2097621-A1 (CA)
Title: Protective automatic dishwashing system
Inventor: BATES CHARLES R JR
IPC: A47L15/42
Filed: 1993-05-28
Abstract: PROTECTIVE AUTOMATIC DISHWASHING SYSTEM               ABSTRACT OF THE INVENTION   A automatic dishwasher protective system is provided for intercepting and preventing an accumulation of leakage liquid into an area beneath the dishwasherprior to the leakage liquid contacting the underlying surface on which the dishwasher is supported.  It also includes an element in the intercepting and preventing means for diverting leakage liquid from the dishwasher away from an area beneath the dishwasher, and alerting a user of the dishwasher that leakage liquid is being emitted into the area beneath the dishwasher.  The protective device includes a wedge-like rear wall for installing the protective device beneath an installed dishwasher without requiring the removal of the dishwasher.
Patent CA-2098217-A1 (CA)
Title: Method for removing soluble benzene from effluent water
Inventor: HART PAUL R
IPC: C02F1/52
Filed: 1993-06-11
Abstract: ABSTRACT         Disclosed are methods for removing benzene from hydrocarbon process waters.  These methods comprise adding aluminum chlorohydrate to the water and then separating the benzene by physical means.
Patent CA-2103247-A1 (CA)
Title: Treatment of waste water
Inventor: HUGHES TERENCE C
IPC: C02F1/52
Filed: 1992-06-10
Abstract: 2103247 9222504 PCTABScor01 A method of treating waste water to remove contaminants therefrom comprises (a) treating the waste water with calcium carbonate under oxidising conditions and separating a precipitate containing Al and Fe hydroxides, therefrom; and (b) treating the partially neutralised waste water from step (a) with sodium carbonate and separating a precipitate containing further contaminants therefrom including at least one of Zn, Cu, Co, Ni, Cd, Al and Fe; and optionally also comprises (c) treating the liquid phase product of step (b) with one or more fatty acids or salts thereof to precipitate further contaminants therefrom, including at least one of Ca, Mg, and Mn, and (d) treating the liquid phase product of step (c) with one or more fatty acid amines to precipitate anionic contaminants therefrom including at least one of sulphate, phosphate and chloride ions.
Patent CA-2104288-A1 (CA)
Title: Methods for alloying a metal containing material into a densified ceramic or cermet body and alloyed bodies produced thereby
Inventor: PYZIK ALEKSANDER J
IPC: C23C10/28
Filed: 1992-03-11
Abstract: Place an alloying metal or an inorganic compound containing an alloying metal in contact with at least a portion of the exterior surface of a densified cermet or ceramic body and then heat the cermet body or the ceramic body to a temperature that allows alloying to occur. The temperature for the cermet body is close enough to the melting temperature of the metal portion of the cermet to allow alloying to occur. The temperature for the ceramic body is close enough for the body's glassy-phase component to soften and allow alloying to occur. The resultant alloyed bodies have a composition gradient that extends into the body perpendicular to the exterior surface portion if alloying stops prior to completion.
Patent CA-2104462-A1 (CA)
Inventor: BOOTH ANTHONY R
IPC: G02C7/02
Filed: 1991-12-05
Abstract: 2104462 9215198 PCTABS00016 An article suitable for oral or personal hygiene use, such as a toothbrush, toothpick, dental floss, denture, razor, eye glasses, contact lens, hair brush or comb, and comprised of polymeric material, has one or more chemically or biologically active agent(s) bonded to the surface thereof.
Patent CA-2106328-A1 (CA)
Title: Laser assisted demolding of ophthalmic lenses
Inventor: ROSS DENWOOD F
IPC: B29C35/08
Filed: 1993-09-16
Abstract: Described is an apparatus and method for removing a molded ophthalmic lens from between the mold portions in which it is produced. A source of intense electromagnetic radiation, preferably a carbon dioxide (CO2) laser of about 80 Watts at a wavelength of 10.6 µm, is applied to at least one of the mold portions. The exposure of the mold portion to the laser is between one half and one second.      Differential expansion of the heated mold polymer relative to the cooler polymer shifts one surface with respect to the other, and the shear force :breaks the polymerized lens\polymer mold adhesion and assists in the separation of mold portions. The greater the temperature gradient between the surfaces of the mold portions, the greater the shearing force and the easier the mold portions separate.      The heated back mold portion is promptly removed so that very little energy is transferred to the polymer lens, avoiding the possibility of thermal decomposition of the lens.
Patent CA-2109400-A1 (CA)
Inventor: DEGEN PETER J
IPC: H01M50/494
Filed: 1993-10-27
Abstract: ABSTRACT      A battery separator comprising an ultra-high molecular weight polyethylene microporous membrane radiation grafted with  a  monomer,  the  separator  having  the  following properties:                      `     (a)  a porosity ranging from about 50% to about 95%, (b)  an average pore size ranging from about 0.1 to about 20 microns, (c)  an electrolytic resistance ranging from about 1 to about 50 m.OMEGA.-in2, (d)  a maximum weight loss of 1% and a change in electrolytic resistance  of  no  greater  than  25%  after immersion in an aqueous solution of 35% KOH and 5% KMnO4 at 50°C for 1 hour, (e)  a tensile strength of from about 3.5 to about 5.5 lb/in in both length and width directions, (f)  a KOH absorption ratio of from about 5 to about 30, (g)  a Gurley air permeability of about 1 to 300 sec/10 ml, and (h)  a thickness from about 0.5 mil to about 10 mil. Further provided is a battery comprising at least one pair of electrodes of opposite polarity, an electrolyte, and a separator of the present invention located between the electrodes of opposite polarity.
Patent CA-2110019-A1 (CA)
Title: Immunoassays for determining vitamin b12, and reagents and kits therefor
Inventor: NEWMAN KAREL
IPC: G01N33/82
Filed: 1993-11-25
Abstract: Methods are described for the development of monoclonal antibodies to intrinsic factor and the application of said antibodies in the development of B12 immunoassays. In particular, antibodies are described that are capable of binding to intrinsic factor only in the absence of vitamin B12, and that are released from binding in the presence, and upon the binding, of vitamin B12 to intrinsic factor. Assays may be formatted such that either antibody or intrinsic factor is immobilized or labeled.
Patent CA-2110364-A1 (CA)
Title: Metal cleaner composition and method
Inventor: OUYANG JIANGBO
IPC: C23G1/12
Filed: 1993-11-30
Abstract: ABSTRACT         A composition of citric acid, a hydroxycarboxylic acid salt, a nonionic surfactant and a coupling agent is used for cleaning metal surfaces and methods of using the same.
Patent CA-2111495-A1 (CA)
Title: System and method for operating a respirator compressor system under low voltage conditions
Inventor: LATORRACA GARY
IPC: A61M16/00
Filed: 1993-12-15
Abstract: The system and method for operating an AC respirator compressor system at substantially subnormal line voltages includes a compressor, an accumulator, a solenoid unload or dump valve used to reduce the pressure at the outlet of the compressor, a check valve located downstream from the solenoid, a relief valve, a pressure sensor, and an AC voltage sensor. In a preferred embodiment, the compressor constantly supplies compressed air to the ventilator system, monitoring the accumulator pressure and activating the solenoid unload valve as required to maintain an acceptable range of pressure in the accumulator. In another preferred embodiment the compressor system can also be operated in an intermittent, or standby mode, to supply compressed air as needed. The respirator compressor system can maintain an acceptable range of pressure in the accumulator even during periods of low AC line voltage by monitoring both the accumulator pressure and the AC line supplying voltage to the respirator compressor system, and modulating the action of the solenoid unload valve to achieve low AC voltage operation.