baber/WOPTO huggingface dataset:
Patent CA-2042352-C (CA)
Title: Broadband optical detection of transient motion from a scattering surface by two-wave mixing in a photo-refractive crystal
Inventor: MONCHALIN JEAN-PIERRE
IPC: G01N21/25
Filed: 1991-05-10
Granted: 1997-11-11
Abstract: A method and apparatus for optically detecting transient motion from a scattering surface.  A laser beam having a predetermined frequency  is directed onto such a surface to thereby scatter  the laser beam and produce a scattered  laser  beam  defining  an  optical  wavefront  and having an optical spectrum with a central peak at the laser frequency and a sideband on either side of the central peak.          The scattered laser beam is caused to interfere inside a photorefractive crystal with a pump beam derived from the laser beam so as to form an index of refraction grating diffracting the pump beam into a reference beam having an optical wavefront substantially matching the wavefront of the scattered laser beam  and an optical spectrum with a single peak at the laser frequency and no sidebands, whereby to produce at an exit face of the photorefractive crystal a transmitted scattered laser beam and a diffracted reference beam interfering with one another.  The interfering beams at the exit of the photorefractive crystal,   or polarization components thereof,  are at least temporarily out of phase, thereby  obtaining  an  optical  signal  sensitive  to  phase perturbations  produced  by  the  transient  motion,   which optical signal is detected and converted into an electrical signal representative of the transient motion. The invention is particularly useful for detecting small surface deformations or displacements of a material subjected to ultrasonic energy, enabling displacements ranging from a fraction of 1.ANG. to a few hundred .ANG. to be detected with a large étendue or light gathering efficiency and a broad frequency bandwidth extending from frequencies as low as 1 KHz, and even below.
Patent CA-2047516-C (CA)
Title: Internal combustion engine
Inventor: MERRITT DAN
IPC: F02B75/28
Filed: 1991-07-22
Granted: 2000-10-03
Abstract: An internal combustion engine has first and second cylinders, the first cylinder having a larger swept volume than the second cylinder and the second cylinder being formed in the crown of the first cylinder. First and second pistons are reciprocable respectively in the first and second cylinders, the second piston being formed as a protrusion on the crown of the first piston. The first cylinder has an air inlet and an exhaust outlet whilst a first fuel source provides fuel to the second cylinder. The second piston has a crown which is spaced from and connected to the crown of the first piston and which has an edge which is relatively thin in the axial direction compared to the spacing of the first piston crown from the second piston crown. This defines a combustion space between the piston crowns and a side wall of the second cylinder when the pistons are substantially at the inner dead centre position. The combustion space communicates with both cylinders during part of the expansion stroke. Inhibiting means is also provided for inhibiting ingression prior to the pistons arriving at or adjacent the inner dead centre position. This can take the form of a gap between the second piston crown and the second cylinder side wall with a peripheral groove in the second cylinder wall at its upper end to enable the fuel/air mixture in the second cylinder above the crown to bypass the piston crown when the latter is at its inner dead centre position and enter the combustion space.
Patent CA-2050276-C (CA)
Title: Improved primer extension reactions
Inventor: TABOR STANLEY
IPC: C12Q1/68
Filed: 1990-04-10
Granted: 2003-03-11
Abstract: A kit or solution for use in extension of an oligonucleotide primer having a first.single-stranded region on a template mole-cule having a second single-stranded region homologous to the first single-stranded region; comprising a first agent able to cause extension of the first single-stranded region of the primer on the second single-stranded region of the template in a reaction mix-ture, and a second agent able to reduce the amount of pyrophosphate in the reaction mixture below the amount produced during the extension in the absence of the second agent.
Patent CA-2058775-C (CA)
Title: Transmission and decoding of tree-encoder parameters of analogue signals
Inventor: MOULSLEY TIMOTHY JAMES
IPC: H03M7/00
Filed: 1992-01-06
Granted: 2003-08-05
Abstract: An analogue signal source (10) is coupled to an analysis means (12) to provide a plurality of parameters on a bus (14). The analysis means also provides a reset signal on a separate line (23) and both the bus (14) and the line (23) are fed to a tree coder (22). The reset signal is applied to the tree coder (22) before each parameter is applied on the bus (14) so that the coder commences from a known position in a coding tree for each parameter. The coded signals are supplied on a bus (24) to a modulator (28) having an output which is coupled to a transmitter (30). A system for recreating analogue signals coded in this way is also described which estimates partial values of parameters using the probability that each of the possible encoded sequences resulted in the signal from which the analogue signals are to be recreated. The recreating system may also use the probability of occurrence of each of the possible encoded sequences during the tree coding. This latter probability may be derived from the probability density function of the parameters. The tree coder may optionally be arranged to provide trellis coding, for example, for 8-PSK or 16QAM modulation.
Patent CA-2061180-C (CA)
Title: Multipoint contact compression connector
Inventor: SCHRADER GARY E
IPC: H01R4/20
Filed: 1992-02-13
Granted: 2001-08-14
Abstract: A multipoint contact compression connector provided with a plurality of recesses to include a like number of electrical conductors or cables therein. When placed in an appropriate crimping device, the connector would contact the interior die surfaces in at least four points, in such a manner, so as to secure at least three conductors or cables in place.
Patent CA-2065063-C (CA)
Inventor: MITANI KATSUAKI
IPC: G03B21/625
Filed: 1992-04-03
Granted: 1996-01-16
Abstract: A projection television provided with a wavelength-selection-type rear projection screen, the transmittance of which is relatively large when the wavelength of incident light is equal to or longer than a predetermined value, but the transmittance of which is relatively small when the wavelength of incident light is shorter than the predetermined value.  Moreover, the projection television most effectively utilizes power of each CRT by increasing the beam current of each of the red and green cathode ray tubes.  With such a screen of which the transmittance is relatively high when incident light is blue light, but the transmittance of which is relatively low when the incident light is red or green light, the magnitude of the beam current of each of the red and green cathode ray tubes, of which the efficiency in emitting light is relatively large, can be increased.  Thus, contrast measured under presence of external light irradiated on the screen can be increased without decreasing luminance.
Patent CA-2068654-C (CA)
Title: Varicella-zoster virus antigen
Inventor: VAFAI ABBAS
IPC: A61K39/42
Filed: 1991-10-04
Granted: 2011-01-04
Abstract: The present invention relates to the construction of a recombinant plasmid which is capable of expressing a secretory trun-cated glycoprotein (Tgp) of Varicella-zoster virus (BZV) in mammalian cells. The secretory Tgp of the present invention contains at least one epitope capable of inducing antibody response. the present invention comtemplates the production and utilization of this secretory Tgp in a vaccine against chickenpox and/or shingles. The present invention is also directed towards the use of the secretory Tgp in diagnostic assays for detection of VZV. The present invention is also directed to first antibodies specific to secre-tory Tgp and to second antibodies specific to the first antibodies.  These second antibodies are also useful in diagnostic assays for VZV.
Patent CA-2069681-C (CA)
Title: Resistive current limiter and process for producing it
Inventor: PREISLER EBERHARD
IPC: H01B12/02
Filed: 1992-05-27
Granted: 1997-01-21
Abstract: A resistive current limiter takes the form of a hollow cylinder  and  is  composed  of  high-temperature  super-conducting  material.  In this  connection,  the  high-temperature superconducting material may be a polynary oxide.            To produce said resistive current limiter, a homogeneous melt is prepared from an oxide mixture,  suitable for forming high-temperature superconductors, in a specified stoichiometry  and  said  melt  is  allowed  to  run,  at temperatures  above  900°C,  into  a casting  zone which rotates  about  its  horizontal  axis.   The  molding, solidified as a cylinder, is removed from the casting zone.  The cylinder  is  sawn  so as to produce  a gap extending  parallel  to  its  axis.   Furthermore,   a multiplicity of slits are sawn into the cylinder parallel to the gap. Finally, the cylinder is heat-treated for up to 150 hours at 700 to 900°C in an oxygen-containing atmosphere.
Patent CA-2072355-C (CA)
Title: Fibrin sealant delivery method
Inventor: MORSE BRENDA SMITH
IPC: A61B17/22
Filed: 1991-01-02
Granted: 2001-05-15
Abstract: The present invention relates to a method for the formulation of fibrin sealant in a single delivery system. The method involves mixing a fibrinogen/Factor XIII precipitate solution with thrombin under conditions such that thrombin clotting activity is inhibited and said mixture is applied to a body site under conditions which activate the thrombin to convert fibrinogen into fibrin sealant. A single device, syringe or container, can be used to apply the fibrin sealant formulation.
Patent CA-2076521-C (CA)
Title: Use-code based call-treatment selection
Inventor: BOGART FRANK JEFFREY
IPC: H04Q3/58
Filed: 1992-08-20
Granted: 1997-03-25
Abstract: Use codes representative of uses of calls are defined as a part of a network numbering plan, and a route or a destination for a call is selected in full or in part on the basis of the use code dialed by a caller in conjunction with the called number via a call-processing arrangement that uses stored definitions of syntax and grammar of the network numbering plan. The syntax definitions are definitions of individual symbol strings, including the use codes, and include the string's associated virtual nodepoint index which indicates the string's influence on call route selection, an indicator of whether the VNI is to be combined with a VNI resulting from any preceding strings in the caller-dialed symbol-sequence, an indicator of whether the VNI resulting from this symbol string is to be combined with a VNI of any succeeding symbol strings in the symbol sequence, and an indicator of the string's influence on destination selection that specifies whether, and how, the symbols of the string are to be modified. The dialed symbol sequence is parsed into symbol strings and the definitions of those symbol strings are used to selectively combine their VNIs and modify their symbols to form a resulting VNI and symbol sequence that specifies the route and the destination for the call.
Patent CA-2078527-C (CA)
Title: Printed circuit board belt conveyor
Inventor: DOUGLAS JOHN J
IPC: H05K13/00
Filed: 1992-09-17
Granted: 1998-07-28
Abstract: The invention provides an article flipper comprising a first turnover member mounted to a conveyor frame member for rotation about an axis substantially perpendicular to said frame  member, a slot in the turnover  member for receiving a side edge of sheets, a stop for arresting sheets with a leading portion of the side edges in the slot, and a rotator for rotating the first turnover member through about 180 degrees.  The article flipper may include a second turnover member having a detent or being movable to clamp sheets between it and the first turnover  member, or may include a rack and pinion.  A belt tensioner which may be used with the article flipper is also provided and comprises a tensioning wheel for engaging the belt, a movable block including a shaft for mounting the tensioning wheel, and a wedge for urging the block toward the belt.  A belt change facilitator which may be used with the article flipper is also provided and comprises a sprocket for circulating the belt, a splined shaft, and a releasable lock for connecting the shaft to the sprocket.  In another aspect, the invention relates to a method for flipping articles.
Patent CA-2079131-C (CA)
Title: Change definition language for computer database system
Inventor: OLSON JACK EDWARD
IPC: G06F17/30
Filed: 1992-09-25
Granted: 2003-04-08
Abstract: A database application implemented on a computer includes a generic database management product (software) such as IBM DB2 along with a catalog defining the way the data itself is stored. The catalog is a definition of the tables, indexes, views, user authorizations, etc., that specify a user's particular application of the database management system. Access to the database via the catalog uses a structured query language or (SQL) which provides a way of expressing statements in a high-level language so the user will not be burdened with writing code to access the data itself. The structured query language provides statements for defining tables, indexes, views, etc., to be incorporated into the catalog. A database application (to fit a user's business) is generated and updated in a number of phases, such as design, development, test and production, and in each one of these phases a facility exists for making alterations in the database definition (catalog), all of which make use of SQL to implement the changes. According to a feature of the invention, a change definition language (CDL) is provided which is an extension of (and in the general format of) the structured query language. The change definition language allows all important alterations to be described, as changes to an existing definition, for example, and may be used by all phases of the development cycle. The CDL statements do not make the changes directly in the catalog, but instead work through SQL and another intermediate mechanism such as DB2 ALTER tailored to make changes using SQL. The changes expressed in CDL may be migrated to downstream phases and fed back to earlier phases by use of a batch of change statements expressed in CDL.
Patent CA-2084421-C (CA)
Inventor: RATKUS VICTOR L
IPC: A61K6/00
Filed: 1992-12-03
Granted: 2001-10-02
Abstract: A dental root canal bacterialcidal lubricant for allowing the cleaning wires or files to move more freely when removing a nerve from a tooth. The composition also reduces packing of tissue and dentin debris within the nerve cavity.
Patent CA-2085563-C (CA)
Title: Systeme de surveillance active et/ou passive d'un gisement souterrain installe a poste fixe
Inventor: STARON PHILIPPE
IPC: E21B47/12
Filed: 1992-12-16
Granted: 2002-05-07
Abstract: la surveillance d'un gisement d'effluents souterrain et son exploration sont conduits en installant différents appareils ou modules utilisateurs : des ensembles de réception tels que des géophones ou hydrophones, des capteurs d'état, des outils nécessitant une alimentation électrique etc, à des emplacements différents le long d'un ou de plusieurs puits forés jusque dans une formation, derrière des tubes (casings) servant à cuveler ces puits ou bien encore dans l'espace annulaire entre ces tubes et des tubings de production, et en reliant ces appareils à une station de surface, par un ensemble de transmission multi-voies particulier simple et fiable. La station de surface est capable d'adapter ses commandes en fonction de l'appareil à commander en retour, de recevoir tous les signaux qu'ils transmettent, qu'ils soient analogiques ou bien numérisés et codés, et de s'adapter à plusieurs modes d'allocation des voies de transmission. Avec un tel système, on peut conduire des opérations de surveillance de longue durée à grande échelle dans des conditions économiques satisfaisantes.    Application à la surveillance d'un gisement pétrolifère par exemple.
Patent CA-2090013-C (CA)
Inventor: LAPIN STEPHEN C
IPC: C03C25/24
Filed: 1991-06-13
Granted: 2003-08-26
Abstract: Optical fiber coatings may be prepared from compositions containing a vinyl ether oligomer prepared by reacting an hy-droxyl-terminated polyester of polyether, a diisocyanate, and a hydroxy monovinyl ether, with mono or multifunctional vinyl eth-er terminated monomers; which may be derived from esters or alcohols.
Patent CA-2091814-C (CA)
Title: Mode selective quadrature amplitude modulation communication system
Inventor: PAIK WOO H
IPC: H04N7/00
Filed: 1993-03-17
Granted: 2000-08-08
Abstract: A quadrature amplitude modulation (QAM) communication system is provided in which data can be communicated in any one of a plurality of QAM modes, such as 16-QAM, 32-QAM, and 64-QAM (30). A receiver (70) detects the particular QAM mode transmitted on a trial and error basis, by attempting to decode the received data using different QAM modes until a synchronization condition is detected. The synchronization condition can require that a plurality of different synchronization tests be met. In a specific embodiment, a first synchronization test is met when a renormalization rate of a trellis decoder (90) is below a threshold value. A second synchronization test is met when a first synchronization word is detected in the received data. A third and final synchronization test is met when a second synchronization word is detected in the received data. In order to reduce the cost of the receiver, most of the QAM mode dependent components (76, 80, 84, 90, 98, 102) are implemented using look-up tables stored in PROMs.
Patent CA-2091961-C (CA)
Title: Thermoplastic resin composition and molded product thereof
Inventor: YAMAMOTO SANEHIRO
IPC: C08F283/14
Filed: 1993-03-18
Granted: 1999-11-16
Abstract: The thermoplastic resin composition of the present invention comprises (A) polyamide having a melting point of not lower than 280 °C, particularly preferably (A-1) specific polyamide having a melting point of higher than 300 °C, (B) a specific modified polymer, (C) a hindered phenol type antioxidant having a molecular weight of not less than 500 and a TGA 10 % weight loss temperature of not lower than 300 °C, and (D) a sulfur type antioxidant having a molecular weight of not less than 600 and a TGA 10 % weight loss temperature of not lower than 280 °C. The molded product of the present invention is made of the above-mentioned thermoplastic resin composition. The thermoplastic resin composition of the invention is excellent in heat stability.
Patent CA-2092185-C (CA)
Title: Detergent compositions containing alkyl ethoxy carboxylates and polyhydroxy fatty acid amides
Inventor: FU YI-CHANG
IPC: C11D1/94
Filed: 1991-09-25
Granted: 1997-11-04
Abstract: Disclosed are detergent compositions comprising and alkyl ethoxy carboxylate component and a polyhydroxy fatty acid amide component.  The detergent compositions of the present invention possess improved cleaning and sudsing properties and exhibit enhanced mildness to the skin.  Also disposed is a method for cleaning soiled dishes by treating said dishes with the detergent compositions disclosed herein.
Patent CA-2098586-C (CA)
Inventor: TULLY DANIEL F
IPC: E04B7/10
Filed: 1991-12-18
Granted: 1998-09-01
Abstract: Toiture parabolique hyperboloïde utilisant une combinaison de panneaux rectilinéaires (10) fixés tangentiellement à une ossature en poutrelles (11), la surface supérieure (11a) de chacune constituant un arc semi-circulaire ou un segment de celle-ci. Les panneaux sont constitués de sous-panneaux rectilinéaires préfabriqués (15 et 16).
Patent CA-2099751-C (CA)
Title: Procede d'etherification
Inventor: ZAHN CARL W
IPC: C07C41/06
Filed: 1993-06-29
Granted: 1998-09-01
Abstract: Méthode pour l'obtention d'éthers par réaction d'oléfines tertiaires avec des alcools. Le procédé d'éthérification comprend deux étapes, soit deux réacteurs; il permet d'obtenir un taux de conversion élevé pour l'ensemble du processus d'éthérification des oléfines tertiaires, avec une consommation réduite en énergie.
Patent CA-2100016-C (CA)
Inventor: STEINHAUSER LOUIS P
IPC: H05B3/06
Filed: 1993-07-07
Granted: 1997-06-17
Abstract: An electrical heater comprising a heating element, a tubular metal sheath surrounding the heating element and spaced therefrom, insulation  inside  the  sheath  for  electrically  insulating  the heating element from the sheath, and a closure closing one end of the sheath.  A passaging extends through the closure in a direction generally lengthwise of the sheath.   At least one power lead adapted for connection to a source of electrical energy extends through the passaging for conducting electrical energy to the heating element.  The power lead includes an electrical conductor, a metallic sleeve surrounding the conductor, and insulation for electrically  insulating  the  conductor  from  the  sleeve.    The conductor has a terminal portion electrically connected to the heating element.  A seal between the closure and the sheath around the one end of the sheath seals against the passage of contaminants between the closure and the sheath.  A seal between the power lead and the closure seals against the passage of contaminants through the passaging in the closure.  The arrangement is such that the closure and the seals seal against the passage of contaminants into or out of the heater through the one end of the sheath.
Patent CA-2111637-C (CA)
Title: Wheel flange lubrication with enclosed strand drive
Inventor: SZATKOWSKI JAMES G
IPC: B61K3/02
Filed: 1993-12-16
Granted: 1999-03-23
Abstract: A railway vehicle wheel flange lubrication system includes a body mounted integrated supply/drive unit, a gapless delivery hose of low friction, e.g. thermoplastic, material and a truck mounted holder bracket.  The supply/drive unit has a box enclosing a lubrication strand dispensing reel, a gearmotor drive unit, a control panel with operating circuitry and a lube out signal.  The gearmotor drive uses a preferably nylon housing with an enclosed, preferably arcuate, passage in which a toothed sprocket driven by a stalled gearmotor penetrates and drives a lubricant strand.  The bracket is configured for sturdy mounting on an axle bearing adapter to maintain the hose end against the associated wheel flange.