baber/WOPTO huggingface dataset:
Patent CA-2024634-C (CA)
Title: Self-powered scr gate drive circuit with optical isolation
Inventor: SMITH CHRISTOPHER A
IPC: H03K17/79
Filed: 1990-09-05
Granted: 1997-06-17
Abstract: The  improved  gate  driver  circuit  provides  a continuous  gate  current  whenever  there  is  sufficient anode-to-cathode voltage difference across the SCR.  This approach described herein eliminates the need to monitor and reapply SCR gate current after each commutation due to load current distortions.  Previous SCR gate driver designs used a pulse train of gate currents to provide a means of keeping the SCRs turned on.   The pulsed gate control  approach has gaps  in the  SCR's operation and requires significant circuitry that dissipates much more drive energy.     Energy for this improved driver circuit is derived from the SCR anode-to-cathode voltage differential.  This eliminates  the  need  for  individual  power  supplies  to provide  isolated  gate  signals  for each  SCR.   This self-powering   feature   reduces   the   intricacy   of controlling multiple SCRs in multi-phase or unreferenced power  systems.   Flexibility  provided  by  this  method allows high power SCRs to be directly interfaced to a digital processor-type controller.
Patent CA-2026518-C (CA)
Title: Two-cycle peristaltic pump
Inventor: MEIJER ROBERT S
IPC: A61M1/10
Filed: 1990-09-28
Granted: 1997-06-10
Abstract: A device for pumping fluid through a resilient tube has a platen  for  holding  the  tube  and  a  pumping  mechanism  for squeezing the tube against the platen.  The pumping mechanism includes a first pumping finger which squeezes the tube at a first location and a second pumping finger which squeezes the tube at a second location.   For their respective alternating pumping actions, the first finger is configured and operated to displace approximately twice the fluid volume displaced by the second pumping finger.   A valve means is also mounted on the base and is positioned to alternately occlude the tube upstream from the first and second pumping fingers during the pumping action of the first pumping finger and to occlude the tube between the first and second locations upstream from the second pumping finger during the pumping action of the second pumping finger.
Patent CA-2027343-C (CA)
Title: Universal crayon sharpener
Inventor: DIETTERICH CHARLES W
IPC: B43L23/08
Filed: 1990-10-11
Granted: 1994-08-30
Abstract: The invention provides a single, universal crayon sharpener capable of accommodating many different sizes of crayons or other similar marking instruments. The invention includes asymmetrical sharpening slots and cutting flanges which cooperate with an internal guide wall to ensure the proper placement and sharpening of a large range of crayon sizes.  The use of asymmetrical sharpening slots and cutting flanges, and an internal guide wall, in addition, permits the efficient reinforcement of the sharpener to resist the forces and stresses generated during the sharpening process.
Patent CA-2032791-C (CA)
Title: Detonation arrestor
Inventor: RAJEWSKI ROBERT K
IPC: F23G5/50
Filed: 1990-12-20
Granted: 1994-08-30
Abstract: DETONATION ARRESTOR               ROBERT KARL RAJEWSKI          ABSTRACT      A detonation arrestor for a flare line includes a cell housing having a particulate quenching medium composed of stainless steel balls. The stainless steel balls are held in place by wire mesh and steel bars. A flame front diffusor is located on either side of the cell housing so that the detonation arrestor is symmetrical may be placed in the flare line in either direction. The flame front diffusor may be a plate or a  smaller  cell.  A  deflector  ring  encircles  the interior of the cell housing and prevents flame fronts from flashing along the edge of the cell housing.
Patent CA-2035325-C (CA)
Title: Low density agglomerate utilizing a carbohydrate binder
Inventor: WISE KENNETH J
IPC: B01J20/04
Filed: 1991-01-25
Granted: 1997-06-10
Abstract: A process  for  the  preparation  of  a  low  density, substantially water-insoluble, particulate material which comprises forming an aqueous slurry containing precipitated calcium carbonate and a carbohydrate binder and treating said slurry to heating and mechanical processing steps to provide a particulate material having a particle size of 5-300 microns, a particle density of no more than 1.0 g/ml., and a resistance against degradation in water; and a low density,    substantially    water-insoluble,    calcium carbonate-containing, particulate material prepared by such process.
Patent CA-2039226-C (CA)
Title: Integrated optical devices for the interferometric measurement of light waves
Inventor: WENDLER MARTIN
IPC: G01J9/02
Filed: 1991-03-27
Granted: 1996-07-02
Abstract: The measurement device for light waves having an un-balanced optical interferometer consisting of waveguides on  a  flat  substrate material  (1)  having  direction-dependent  thermal  expansion  is  thermally compensated without active regulation in that a determined spatial arrangement and a length ratio are selected for the light paths (L1, L1'), in which the optical length of the two waveguides changes precisely by the same amount, so that as a result the optical path difference remains unchanged as a function of the temperature.
Patent CA-2046339-C (CA)
Title: Liquid jet blower
Inventor: TUBAKI TATSUO
IPC: B05B9/08
Filed: 1990-12-21
Granted: 2001-04-10
Abstract: This invention relates to a liquid jet blower that operates as an aerosol sprayer without using any pressurized gas. This invention is intended to provide a liquid jet blower which is free from clogging of the nozzle and undesired flows of the liquid outside its container. To that end, means are provided for relieving any excessive pressure within its pressure chamber and transferring any remaining liquid to a small chamber specifically arranged within the blower.
Patent CA-2049239-C (CA)
Inventor: STEEBY JOHN A
IPC: F16H61/70
Filed: 1991-08-15
Granted: 1995-02-21
Abstract: A control method/system (200) for a control system (104) for semi-automatically executing automatically selected upshifts and downshifts of a mechanical transmission system (10) is provided.  The control system includes a central processing unit (106) for receiving input signals indicative of transmission input shaft (16) and output shaft (90) speeds (IS, OS) and processing the same in accordance with predetermined logic rule to issue command output signals to a transmission actuator (112, 70, 96) to implement the selected shifts by automatic shifting into neutral upon a naturally or manually caused torque reversal of the transmission and remaining in neutral until the vehicle operator causes substantially synchronous conditions to occur.  The method/system (200) includes calculating a first and second reference value (REF-UP, REF-DN) as functions of input shaft speed and only preselecting upshifts of output shaft acceleration (dOS/dt) exceeds the first reference (REF-UP) and only preselecting downshifts if output shaft acceleration (dOS/dt) is less than the second reference value (REF-DN).
Patent CA-2054705-C (CA)
Inventor: KOUNO HIDEHIKO
IPC: G01B11/02
Filed: 1991-02-22
Granted: 2001-08-14
Abstract: A device for measuring an angle (.alpha.) of two intersecting surfaces (1, 2) of a work (W) including a light emitting device (8) for inducing a light pattern (9, 10) on the surfaces of the work, a camera (4) for picking up the pattern, and an image processor (11) for processing the picture of the pattern for obtaining the angle of the work.
Patent CA-2055931-C (CA)
Inventor: BUDDENHAGEN DOUGLAS A
IPC: C08K5/01
Filed: 1991-11-21
Granted: 2008-07-15
Abstract: An elastomeric composition is formed of at least two, and preferably three, S-EB-S elastomeric triblock copolymers having different solution viscosity/copolymer concentration relationships, and a sufficient amount of a mineral oil plasticizer to achieve excellent tactility with acceptable strength. To prepare articles such as medical film protective devices, the elastomeric composition is dissolved in a sufficient amount of a solvent to permit dip forming. A form having the shape of the desired product is dipped into the solution to build up a film of the elastomeric composition on the form. The dip-formed elastomeric films are free of pinholes and resistant to oxidative and ozone attack. The films are particularly suitable for use in products such as gloves, condoms, external catheters, catheter balloons, cuffs, dilatation balloons, instrument covers, and drains.
Patent CA-2057702-C (CA)
Title: Catalyst for purifying exhaust gas
Inventor: NAKANO MASAO
IPC: B01J29/06
Filed: 1991-12-16
Granted: 1998-12-01
Abstract: A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from an oxygen-rich exhaust gas containing nitrogen oxides, carbon monoxide and hydrocarbons, comprising (i) a zeolite having an SiO2/Al2O3 mole ratio of at least 15 and (ii) (a) cobalt, (b) an alkaline earth metal and (c) silver, or nickel and/or zinc, or platinum and/or manganese, or copper and/or rhodium, incorporated thereinto.
Patent CA-2060624-C (CA)
Title: Benzimidazoles, pharmaceutical compositions containing these compounds and processes for preparing them
Inventor: HAUEL NORBERT
IPC: C07D487/04
Filed: 1992-02-04
Granted: 1999-12-21
Abstract: The invention relates to compounds of formula I (see above formula) and addition salts thereof. As examples of groups R1, there are mentioned fluorine, chlorine, bromine, alkyl and cycloalkyl and as examples of groups R2 there are mentioned alkyleneimino, alkenyleneimino, malefic acid imido, benzimidazol-2-yl and 4,5,6,7-tetrahydrobenzimidazol-2-yl. R3 represents an alkyl or a cycloalkyl group and R4 represents a carboxyl or 1H-tetrazolyl group. The new compounds have useful pharmaceutical properties and are, in particular, angiotensin antagonists.
Patent CA-2069978-C (CA)
Title: Microwave resonator of compound oxide superconductor material
Inventor: HIGAKI KENJIRO
IPC: H01B12/06
Filed: 1992-05-29
Granted: 1996-07-23
Abstract: A microwave resonator includes a superconducting signal conductor formed on a first dielectric substrate, and a superconducting ground conductor formed on a second dielectric substrate. The first dielectric substrate is staked on the superconducting ground conductor of the second dielectric substrate. A temperature adjustable heater is mounted near to the second dielectric substrate, so that the resonating frequency fo of the microwave resonator can be easily adjusted by controlling the temperature of the superconducting conductors by the adjustable heater.
Patent CA-2070710-C (CA)
Title: Tampon assembly, including wrap for disposal of spent applicator
Inventor: KADEL BETTY
IPC: A61B19/02
Filed: 1992-06-08
Granted: 1996-07-30
Abstract: A tampon applicator assembly is disclosed wherein the protective wrap which initially packages the tampon applicator provides a simplified covering for disposal of the spent applicator.   The tampon applicator wrap is opened at a pre-determined location such that a discrete portion remains which is significantly longer than the applicator barrel member.  Accordingly, after tampon ejection, with the plunger telescopingly located within the barrel, that unit is then inserted within the discrete wrap portion, which includes a substantial length extending beyond the reinserted applicator.          That substantial length is then twisted and tucked into the opened end  of  the  applicator  to  maintain  closure  of  the  wrap  for applicator disposal.
Patent CA-2072814-C (CA)
Title: Benzomorphans and their use as pharmaceutical compositions
Inventor: CARTER ADRIAN
IPC: A61K31/435
Filed: 1992-06-30
Granted: 2003-09-23
Abstract: The present invention relates to new benzomorphan derivatives of general formula (T)   processes for their preparation and their use as pharmaceutical compositions for treating cerebral ischaemia of various origins, epilepsy and neurodegenerative diseases.
Patent CA-2074644-C (CA)
Title: Psa system with product turndown and purity control
Inventor: SHIRLEY ARTHUR I
IPC: B01D53/04
Filed: 1992-07-24
Granted: 1999-06-15
Abstract: Apparatus and process  for  the production of  a  purified product gas at a user specified product gas demand from a feed gas containing impurities which includes at least one treatment zone having an inlet and outlet region,  a sensing device for detecting  a  change  in  product  gas  demand,  a  device  for generating a first signal, a device for translating the first signal and comparing the same to a standard, and a device for converting  the  translated  signal  to  a  second  signal  which operates a valve to vary the feed rate of the gas entering the system.
Patent CA-2080067-C (CA)
Title: Device and method for identifying and quantifying layered substances
Inventor: INKPEN STUART
IPC: G01W1/00
Filed: 1992-10-07
Granted: 2001-02-06
Abstract: An apparatus for identifying and measuring in real time substances overlying a surface comprises a plurality of electrodes, a temperature sensor, an electrode control system connected to the plurality of electrodes for defining an electric field, an amplitude and phase measurement system connected to the plurality of electrodes and to the electrode control system for measuring a plurality of currents responsive to the electric field and converting the currents to a measurement set and computer for storing a map comprising a partition of a vector space of predetermined characteristics of substances into regions of profiles corresponding to the substances which could be overlying the surface. The computer correlates the measurement set with the map thereby identifying and quantifying the substances overlying the surface and generates an output signal corresponding to the identity and quantity of substances overlying the surface. A display responsive to the output signal displays the identity and quantity of substances overlying the surface.
Patent CA-2083091-C (CA)
Inventor: LAFERRIERE ROGER
IPC: C02F1/52
Filed: 1992-11-17
Granted: 1996-12-03
Abstract: La présente invention traite des améliorations apportées à l'élimination des impuretés générées sous forme d'acide sulfurique usé lors de la fabrication de pigments de titane via le procédé au sulfate. La neutralisation de cet acide usé produit, d'une part, un matériau de valeur commerciale: le gypse; et d'autre part, des boues résiduelles qui après avoir été traitées selon les revendications du présent brevet, sont aptes à l'enfouissement sanitaire.
Patent CA-2084983-C (CA)
Inventor: NAKAMURA TAKAO
IPC: H01L39/14
Filed: 1992-12-09
Granted: 1996-11-12
Abstract: A superconducting device comprising a substrate having a principal surface, a superconducting source region and a superconducting drain region formed of an oxide superconductor on the principal surface of the substrate separated from each other, an extremely thin superconducting channel formed of the oxide superconductor between the superconducting source region and the superconducting drain region. The superconducting channel electrically connects the superconducting source region to a superconducting drain region, so that a superconducting current can flow through the superconducting channel between the superconducting source region and the superconducting drain region. The superconducting device comprises a gate electrode through a gate insulator on the superconducting channel for controlling the superconducting current flowing through the superconducting channel, and non-superconducting oxide layers having a similar crystal structure to that of the oxide superconductor. The non-superconducting oxide layers contact with at least the superconducting source region and the superconducting drain region. In the superconducting device, the superconducting channel, the superconducting source region and the superconducting drain region are formed of one oxide superconductor thin film of which the center portion is c-axis oriented and the both ends are .alpha.-axis oriented.
Patent CA-2088955-C (CA)
Inventor: PANTZAR GORAN
IPC: B23C5/02
Filed: 1993-02-05
Granted: 2002-06-25
Abstract: A cutting insert is produced by form-pressing and sintering of powder. The insert comprises a top chip surface, a bottom surface, and at least one edge surface extending between the top and bottom surfaces. The edge surface includes at least one relief surface portion which intersects the top surface at an acute angle to form therewith a cutting edge. A grinding operation is performed on the edge surface, but only along a lower portion thereof disposed below the relief surface portion, i.e., only along an area which is to be placed against a locating surface of a machine tool during a cutting operation.
Patent CA-2090848-C (CA)
Title: Stabilized peroxide gels containing fluoride
Inventor: WILLIAMS DAVID ROBERT
IPC: A61K33/24
Filed: 1993-03-02
Granted: 1997-06-03
Abstract: A dental product for maintaining protection against caries formation includes a dual compartment dispenser. The first compartment contains an oral composition including a peroxygen compound such as hydrogen peroxide, a fluoride-containing anticaries agent and a tin compound, especially stannous chloride. The tin compound stabilizes the peroxygen compound against decomposition that ordinarily would be induced by the presence of fluoride. A second compartment of the dental product contains an alkali metal bicarbonate and a fluoride anticaries compound in an amount essentially identical to the amount in the oral composition.
Patent CA-2096140-C (CA)
Title: Methode servant a fabriquer un rouleau de papier hygienique sans mandrin, et papier ainsi obtenu
Inventor: KAJI KAZUSHI
IPC: B65H18/00
Filed: 1992-04-15
Granted: 1998-07-14
Abstract: Rouleau de papier hygiénique sans mandrin produit par enroulement du papier de sorte que la vitesse d'enroulement dans le dispositif d'enroulement soit plus rapide que la vitesse d'alimentation du papier dans le dispositif d'alimentation du papier et le dispositif d'avance, durant la période de démarrage et durant la période finale de l'enroulement du papier, en laissant en place le rouleau de papier hygiénique enroulé, les feuilles de l'arbre d'enroulement sortant de manière radiale, vers l'extérieur, pendant une durée prédéterminée, après l'étape de l'enroulement, et par après, en rétrécissant l'ensemble des feuilles et en retirant le rouleau de papier hygiénique de l'arbre d'enroulement. Le rouleau de papier hygiénique ainsi produit comporte un corps de rouleau fait de matériau de papier hygiénique enroulé et dont la couche de départ est enroulée serrée et les enroulements suivants de papier sont progressivement relâchés, de l'épaisseur intermédiaire à l'épaisseur la plus à l'extérieur, une ouverture destinée à recevoir la barre de support d'un support pour papier hygiénique et formée au centre du rouleau; de plus, la surface intérieure de l'ouverture est unie, sans saillie.
Patent CA-2102856-C (CA)
Title: Backplane optical spine
Inventor: BOWEN F WAYNE
IPC: H05K7/14
Filed: 1993-11-10
Granted: 1997-04-22
Abstract: Optical spine backplane apparatus for interconnecting circuit cards. The apparatus comprises a central spine structure formed of a bundle of optical fibers extending between circular collars each positioned along the spine and formed around the optical fiber bundle to form a shelf for mounting circuit cards.  Each circular collar has an optics pad consisting of optical transmitters and receivers coupled with ones of the optical fibers and with signal leads connected to a first coupling or crosspoint matrix array.  A circular collar is constructed of a bundle of electrical conductors formed around the outside of the central spine with each electric conductor coupled to the first coupling or crosspoint matrix array and to second coupling or crosspoint matrix arrays positioned around the outside of thecollar.  Each of the second coupling or crosspoint matrix arrays is connected bysignal leads to a socket connector intended to receive a plug-in circuit card. The coupling or crosspoint matrix arrays serve to selectively interconnect circuit cards via ones of the circular collar electrical conductors and optical fibers.
Patent CA-2102947-C (CA)
Inventor: BONNE ANDREAS
IPC: E05F15/40
Filed: 1993-11-12
Granted: 1997-01-21
Abstract: In a trapping protector for power-operated closing devices, particularly electrically operated windows and sunroofs of motor vehicles, with two electrical conductors a distance apart from each other which trigger a switching process in respect of the drive unit when brought into contact, for the purposes of simple manufacture and reliable contact-making the invention proposes that the trapping protector comprises a flexible hollow profile (10) made of an elastomer or plastic which has a flat base area (11) and a mounted arched profile area (12), enclosing a hollow chamber (16), and that the base area (11) and the zenith area (13) of the arched profile area (12) comprise conductive material and are separated from each other by means of insulating profile areas (14, 15) (Fig. 2).
Patent CA-2105544-C (CA)
Title: Error rate monitor
Inventor: SCHMIDT DOUGLAS C
IPC: H04L69/40
Filed: 1993-09-03
Granted: 1999-03-16
Abstract: An error rate monitor determines, on a safe and effective basis, when a transmission link is experiencing excessive errors and should be taken out of service. Safety is assured by preforming a changeover when the amount of data awaiting transmission via the link gets too high; effectiveness is assured by keeping the link in service despite short term error bursts that can be overcome by data retransmission. In one monitor arrangement, errors that occur in the transmission link during a fixed time interval are monitored. If one or more errors occur in an interval, an increment is added to a counter (originally initialized to zero). If no errors occur in the interval, a decrement is subtracted from the counter, to a minimum of zero. The increment and decrement values are determined as a joint function of (a) the round trip delay on the transmission link, (b) the maximum allowable error rate on the link, and (c) the link speed, so that, in general, the increment and decrement values are significantly different. When the counter exceeds a given threshold, T, a changeover is declared. The value of T is determined as a joint function of (a) the maximum amount of data in the messages that should be stored in the transmit buffers when changeover occurs, (b) the maximum allowableerror rate on the link, and (c) the duration of the fixed time interval.
Patent CA-2110914-C (CA)
Inventor: MIRANDA JESUS
IPC: A61L15/18
Filed: 1992-06-22
Granted: 2000-12-05
Abstract: The method of adjusting the saturation concentration of a drug in a transdermal composition for application to the dermis, which comprises mixing polymers having differing solubility parameters, so as to modulate the delivery of the drug. This results in the ability to achieve a predetermined permeation rate of the drug into and through the dermis. In one embodiment, a dermal composition of the present invention comprises a drug. an acrylate polymer, and a polysiloxane. The dermal compositions can be produced by a variety of methods known in the preparation of drug-containing adhesive preparations, including the mixing of the polymers, drug, and additional ingredients in solution. followed by removal of the processing solvents. The method and composition of this invention permit selectable loading of the drug into the dermal formulation and adjustment of the delivery rate of the drug from the composition through the dermis, while maintaining acceptable shear, tack, and peel adhesive properties.
Patent CA-2111244-C (CA)
Inventor: SIMMS JOHN A
IPC: C09D161/28
Filed: 1991-06-20
Granted: 2003-01-07
Abstract: Crosslinkable coatings that contain a polyol component which is a caprolactone oligomer containing a cycloaliphatic moiety having improved properties, especially lower viscosity and improved coating hardness, and are useful for coating metals and plastics.