baber/WOPTO huggingface dataset:
Patent CA-2009023-A1 (CA)
Inventor: ITO HIROYUKI
IPC: G11B19/28
Filed: 1990-01-31
Abstract: A disk rotary driving apparatus in an optical disk reproducing apparatus capable of reproducing disks having different sizes includes a spindle motor for rotationally driving a disk, a servo unit for controlling rotation of the spindle motor, and a control unit for detecting an activation response state of the spindle motor upon starting, and switching a gain of the servo unit on the basis of the detection result.
Patent CA-2009251-A1 (CA)
Title: Distillation separation membrane and method for membrane distillation separation
Inventor: YING WANG
IPC: B01D67/00
Filed: 1990-02-02
Abstract: ABSTRACT OF THE DISCLOSURE           A distillation separation membrane for use in desalination of sea water or brine  is provided.   The membrane  has  a  hydrophobic  separation  coating  on  the surface of a porous support member.  A method is provided wherein such a coating is formed dynamically on the porous support member by subjecting the surface of the porous support member to a membrane forming component for a period of time sufficient to form a separation coating capable of distillation separation of salt from water. A method of desalinating  sea water  or brine by means  of membrane distillation is provided using a separation membrane having an electro-conductive porous support member and supplying electrical current to the porous support member to heat the brine or sea water in contact with the membrane and cause vaporization of the brine or sea water, the vapour thus created  passing  through  the  distillation  separation membrane for subsequent liquefication.
Patent CA-2013658-A1 (CA)
IPC: E21B7/30
Filed: 1990-04-02
Abstract: "PROCESS FOR REPLACING A LENGTH OF BURIED PIPE"           ABSTRACT OF THE DISCLOSURE The process comprises excavating pits at the first and second ends of a buried section of old water main pipe that is to be replaced with new pipe.  The exposed segments of pipe are broken up to provide access to the bore of the old pipe.  A pipe splitter and a cylinder-actuated pulling unit are installed in the first pit.  A string of rods is extended through the old pipe bore from the first pit to the second pit.   A tool assembly of sequentially connected components is attached to the second end of the rod string. The tool assembly may comprise:  means for centralizing the second end of the rod string in the second end of the old pipe section; a pull plate for bearing against the annular second end face of the old pipe section; a cylindrical plug for expanding the passageway extending between the pits; a rod member for extending through the bore of the new pipe section to be installed; and a second pull plate for bearing against the annular second end face of the new pipe.  The new pipe section is mounted on the rod member and the string of rods is tripped to the first pit.  In the course of tripping or retracting the rod string,  the following actions simultaneously occur:  the old pipe is advanced out of the passageway by pulling on it with the first pull plate; the old pipe is split longitudinally as it is advanced into the first pit; the diameter of the passageway is expanded by the plug; and the new pipe is pulled into the expanded passageway to replace the old pipe with the new pipe.
Patent CA-2014250-A1 (CA)
Title: Prosthetic foot having a low profile cantilever spring keel
Inventor: FIRTH DAVID G
IPC: A61F2/66
Filed: 1990-04-10
Abstract: A prosthetic foot (10) includes a viscoelastic cantilever spring keel (12) encased in foamed polymer cover (14) shaped to resemble a human foot. The keel (12) includes an attachment flange (16) for connecting the keel to an upper prosthesis at a location generally corresponding to the location of the ankle joint of a human foot. The keel (12) also includes a forefoot portion in the form of a singular beam (22) cantilevered forwardly and diagonally downwardly from the mounting flange (16). The beam (22) is composed of a primary section (50) extending forwardly from the attachment flange (16) and a forward portion (48) having a significantly lower spring rate and, thus, substantially more compliant than the adjacent portions of the beam primary section (50).
Patent CA-2014379-A1 (CA)
Inventor: ORLEK BARRY S
IPC: A61K31/41
Filed: 1990-04-11
Abstract: A compound of formula (I) or a pharmaceutically acceptable salt thereof: (see formula I) wherein R1 represents (see formula A) or (see formula B) in which each of p and q independently represents an integer of 2 to 4, r represents an integer of 2 to 4, s represents 1 or 2 arid t represents 0 or 1;   R2 is a group OR4, where R4 is C1-4 alkyl, C2-4 alkenyl, C2-4 alkynyl, a group OCOR5 where R5 is hydrogen or R4, or a group NHR6 or NR7R8 where R6, R7 and R8 are independently C1-2 alkyl; and R3 is chloro, fluoro, bromo, cyclopropyl, C1-3 alkyl substituted by one, two or three halogen atoms, or R3 is a group (CH2)n R9 where R9 is -CN, -OH, -OCH3, -SH, -SCH3, -C~CH or -CH=CH2 and n is 0 or 1, with the proviso that when n is O, R9 is not -OH or -SH.
Patent CA-2018880-A1 (CA)
Title: Scanning line number converting device for video signal, and down-converter and picture-in-picture tv receiver using the same
IPC: H04N5/44
Filed: 1990-06-13
Abstract: In a scanning line number converting device, a video signal is converted into a digital signal, its scanning lines being thinned out by a thinning-out circuit (5) in the vertical direction to reduce the vertical direction sampling frequency and interpolated so as to form a non-interlace signal.  The non-interlace signal is written in a frame memory (7), under control of a writing control circuit (8).  A field determination circuit (15) determines a field of a video signal used as reference.          According to this determination output, the non-interlace signal is read out of the frame memory while undergoing a conversion into an interlace signal such that its interlace sequence corresponds to that of the reference video signal, resulting in a conversion of the scanning line number.  A down-converter for converting a high-resolution TV signal into an NTS signal is configured using this scanning line number converting device.  Also, a picture-in-picture television is configures using the scanning line number converting device so as to thin out the scanning lines of a video signal of a sub-picture inserted into a main picture.
Patent CA-2020220-A1 (CA)
IPC: H01Q9/22
Filed: 1990-06-29
Abstract: METHOD AND APPARATUS FOR TUBE         ELEMENT BRACKET          ABSTRACT           An improved bracket is disclosed formed by a tube element (10).  Opposing slots (26, 28) are formed into the tube element a predetermined distance from a first end (22) of the tube element.  The opposing arcuate sections (30, 32) defined by those slots are deformed by cooperating dies (34, 36) to form the bracket.  The tube element (10) can be a tubular antenna (206) secured along an antenna rod (202).
Patent CA-2021475-A1 (CA)
Title: Fuel burner for a boiler
Inventor: ZHAO HUI F
IPC: F23C7/00
Filed: 1990-07-18
Abstract: Abstract A fuel burner for a boiler has a first assembly for delivering a flowable fuel into the boiler from a fuel delivery duct with or without combustion supporting primary air, and a second assembly for delivering secondary air in support of the combustion.  The burner has a precombustion chamber defined by a wall extending into and opening in the combustion chamber in the boiler. The secondary air is delivered into the precombustion chamber close to the outlet of the fuel delivery duct, and a third assembly is provided for delivering tertiary air into the precombustion chamber downstream with respect to the secondary air outlet.  This third assembly is disposed in the precombustion chamber.  A jet flameholder is arranged with nozzles opposite to and spaced from the outlet of the fuel delivery duct.  The jet flameholder is associated with an assembly which provides compressed fluid to eject fluid jets against the stream of the fuel, and this creates a recycle zone in the precombustion chamber.  This arrangement allows combustion of lower grade fuels with reduced production of nitrogen oxides.
Patent CA-2021773-A1 (CA)
Inventor: AKESAKA TOSHIO
IPC: E21D9/08
Filed: 1990-07-23
Abstract: A shield tunnelling machine comprises a tubular shield body (12), an excavating cutter assembly (52) disposed on a front end of the body, a partition wall (24) for defining the interior of the body into a front region and a rear region behind the front region, the front region having a first chamber (18) for receiving matter excavated by the cutter assembly and a second chamber (20) communicating to a rear portion of the first chamber so as to receive the excavated matter from the first chamber, the second chamber extending around an axis of the body, a rotor (46) disposed in the first chamber and having an outer diameter gradually increasing toward the rear, a drive mechanism (84) for turning the rotor around a first axis extending in the longitudinal direction of the body and rotating the rotor around a second axis eccentric to the first axis, an annular member (66) mounted to the rotor so as to be turned and rotated together with the rotor in the second chamber and extending around the axis of the body and a discharging mechanism for discharging the excavated matter received in the second chamber from a lower portion of the second chamber to the rear region.
Patent CA-2022566-A1 (CA)
Title: Catalyst and process for the polymerization and copolymerization of alpha-olefins
Inventor: PORRI LIDO
IPC: C08F4/6592
Filed: 1990-08-02
Abstract: Alpha-olefin polymers and copolymers are prepared by polymerizing the monomers in the presence of a catalyst obtained by bringing unto contact: a) a compound definable by the formula:   (see formula I) where:      M represents a metal of group 4B of the periodic table of elements; each R independently represents a halogen atom; a linear or branched C1-C10 alkyl group; or an aryl group; and each Cp independently represents the cyclopentadienyl, indenyl or fluorenyl group, possibly carrying one or more C1-C4 alkyl substituents, which Cp groups can also be connected together by a carbon atom or alkylsilane bridge structure;     b) a -trialkylaluminium:   (see formula II) where each R' independently represents a linear or branched C1-C10 alkyl group, or an aryl group; and c) a distannoxane:   (see formula III) where each R" independently represents a linear or branched C1-C6 alkyl group, or an aryl group; the molar ratio of component (b) to component (a) being less than about 700,000/1 and the molar ratio of component (c) to component (b) being less than 1/1.      The catalyst is active in the homopolymerization of ethylene, propylene and higher alpha-olefins, in the copolymerization of ethylene with propylene or with a higher alpha-olefin, and in the terpolymerization of ethylene, propylene and diene.
Patent CA-2023636-A1 (CA)
Title: Oral immunoglobulin collection for immunoassay
Inventor: GOLDSTEIN ANDREW S
IPC: G01N33/53
Filed: 1990-08-20
Abstract: ABSTRACT OF THE DISCLOSURE The  present  invention  is  concerned  with  collecting immunoglobulins  from  the  oral  cavity  for  immunological testing.  A rinse and an absorbent pad are used to collect a specimen having a high concentration of immunoglobulins. The specimen can be subjected to a basic immunological testing technique which can be used as a tool for screening a patient for diseases.  A test kit is also provided for.
Patent CA-2025413-A1 (CA)
Inventor: SUZUKI FUMIO
IPC: A61P25/28
Filed: 1990-09-14
Abstract: There are disclosed s-triazolo[3,4-i]purine derivatives represented by formula: <CHEM>  wherein Y-Z represents <CHEM> where R<4> represents hydrogen, alkyl, substituted or unsubstituted aromatic heterocyclic group or substituted or unsubstituted aryl; and X<2> represents oxygen, sulfur or NH; each of R<1> and R<2> independently represents hydrogen, alkyl, cycloalkyl, aralkyl or substituted or unsubstituted aryl; R<3> represents alkyl, cycloalkyl, aralkyl or substituted or unsubstituted aryl; X<1> represents oxygen or sulfur; and <CHEM> represents a single bond or a double bond or pharmaceutically acceptable salts thereof.
Patent CA-2028735-A1 (CA)
Title: Low boiling point azeotropic fluoroalcane mixture and its uses
Inventor: ARNAUD DIDIER
IPC: C09K3/00
Filed: 1990-10-29
Abstract: An azeotrope of minimum boiling point, capable of being employed as refrigerating fluid replacing chlorofluorocarbons or as an extinguishing agent replacing bromofluorocarbons and chlorobromofluorocarbons. The azeotrope according to the invention is a mixture of 1,1,1,2-tetrafluoroethane and perfluoropropane. At normal boiling point (approximately -41.1 DEG C at 1.013 bar) its perfluoropropane content is approximately 76 mass% and that of 1,1,1,2-tetrafluoroethane is 24 %. This azeotrope can also be employed as an aerosol propellant or as a blowing agent for plastic foams.
Patent CA-2031298-A1 (CA)
Title: Fastener driving tool set
Inventor: MOLINARI PAUL J
IPC: B25B15/00
Filed: 1990-11-30
Abstract: ABSTRACT        A fastener driving tool set is disclosed wherein a plurality of fastener tools are driving each mounted within a casing for swinging movement on a shaft between a stowage position within the casing and an operating position outside that casing.  The casing itself serves as a handle for manually operating a selected tool in an operating position.          The tool set features a stop means for establishing a fully opened operating position for the tools upon rotating each tool from its stowage position into engagement with the stop means, the stop means cooperating with the different size tools for uniformly positioning each of the tools in a fully opened operating position angularly displaced about 270 degrees from the stowage position, thereby minimizing undesired foldback of a tool when it is used in a high torque fastener driving application.
Patent CA-2032339-A1 (CA)
Inventor: ARFSTEN NANNING
IPC: C03C17/04
Filed: 1990-12-14
Abstract: Large area decorations of glazings, ceramic paint or the like on glass ceramic, glass, ceramic or similar meltable substrates, in particular on glass ceramic cooking plates, are applied by the new method by means of a laser beam which is widened linearly over the entire width of the area to be decorated, as it were in a zone melting method. The linear energy supply zone is advanced at a speed high enough for essentially only the decorating material to be melted on or burnt in hut ensuring that the thermal conduction front does not move appreciably into the substrate material.
Patent CA-2033150-A1 (CA)
Title: Process for preparing granular polyarylene sulfides having high molecular weight
Inventor: SENGA MINORU
IPC: C08G75/0254
Filed: 1990-12-24
Abstract: ABSTRACT OF THE DISCLOSURE         A  process  for  preparing  a  granular  polyarylene sulfide  having  a  high  molecular  weight  is  a  one-stage polycondensation   process   which   involves   subjecting   a dihalogen aromatic compound to polycondensation with a source of  sulfur  in  the  presence  of  a  polymerization  aid  in  an organic polar solvent and setting the temperature for polycon-densation to a range from 220 °C  to 248 °C for a predetermined period of time prior to completion of polycondensation up to completion   of   polycondensation.   The   resulting   granular polyarylene sulfide  is  suitable for molding or forming into sheets,  films,  fibers  and  so  on,  causes  less  burrs  when subjected to  injection molding,  has a high molecular weight sufficient  to create the property of forming a gel,  and is easy to handle.
Patent CA-2033858-A1 (CA)
Title: Cutting bit
Inventor: BEACH WAYNE H
IPC: E21C35/18
Filed: 1991-01-09
Abstract: ABSTRACT OF THE DISCLOSURE Briefly, according to this invention, there is provided a cutting bit useful in construction and/or mining and a socket mount to rotatably support the cutting bit.  The socket mount includes a bore having a cylindrical shape and either a conical opening or a substantially cylindrical opening at a front end thereof.  The cutting bit includes a working head having a shoulder and a shank of circular cross section depending from the working head.  The shoulder may be either chamfered or straight.  The shank includes a spacer contiguous with the shoulder of the working head, an annular recess contiguous with the spacer, and an annular retainer contiguous with the annular recess. The shoulder and the spacer substantially conform to the size and shape of the interior surface of the socket mount at the juncture of the opening and cylindrical shaped bore.  A spring sleeve is disposed within the annular recess.  The spring sleeve is partitioned from the shoulder and spaced from the opening of the socket mount and adapted to expand radially relative to the shank against the cylindrical shaped bore and to abut endwise against the spacer to retain the shank of the cutting bit within the socket mount.
Patent CA-2034267-A1 (CA)
Title: Portable printing apparatus
Inventor: BAZZANI GIOVANNI
IPC: B41J29/00
Filed: 1991-01-16
Abstract: ABSTRACT OF THE DISCLOSURE    The apparatus comprises a bearing structure (2), a slidably movable print head (6) guided in said bearing structure, a dragging unit (22, 23) adapted to move a sheet (7) to be printed under the print head and exhibiting dragging members (22) directly acting on the sheet, a plate-like body (4) provided with a write surface (5) located under the print head and representing a rest surface for the sheet, the bearing surface and plate-like body are substantially in mutual contact and a raised position for putting the sheet in place, in which the dragging members directly acting on the sheet are located in the plate-like body substantially below the write surface.
Patent CA-2034351-A1 (CA)
Title: Process for the isolation and purification of free acids, starting from their salts, by electrodialysis
Inventor: GOMEZ JOSE RAMON OCHOA
IPC: C07C51/02
Filed: 1991-01-17
Abstract: ABSTRACT      Process for the isolation and purification of free acids, starting from their salts, by electrodialysis which involved the use of: i)   an electrolytic cell of four compartments, in which the two compartments adjacent to the two electrodes are separated from the central compartments by means of cationic membranes (2) and the central compartments are separated from one another by means of an anionic membrane (1); or, alternatively, ii)  a module formed by an array of cells of 4 compartments separated from one another by alternating anionic membranes and cationic membranes.     By means of this process, the simultaneous presence of the isolated free acids and their salts in the same compartment is prevented, which increases their purity.  A large number of acids and amino acids can be isolated and purified.  In a preferred embodiment, the purification and isolation of IDA is described.        Figures 1 and 2
Patent CA-2034884-A1 (CA)
Inventor: KAMIMURA TADASHI
IPC: B23K9/04
Filed: 1991-01-24
Abstract: In  a  method of modifying qualities  of  materials  at their  local parts, the method comprises the steps  of:  making capsule particle by encapsulating a core particle with covering particles;  making a wire by filling a sheath member  with  the capsule  particle;  and making  weld cladding on  the  material whose qualities are to be modified with the wire.
Patent CA-2035082-A1 (CA)
Title: Continuous process for the preparation of polymers of carbon monoxide with one or more olefinically unsaturated compounds
Inventor: MASTENBROEK BAREND
IPC: C08G67/00
Filed: 1991-01-28
Abstract: Process for the preparation of linear polymers of carbon monoxide with one or more olefinically unsaturated compounds in which polymers the units originating from carbon monoxide and the units originating from the olefinically unsaturated compounds are present in a substantially alternating order by contacting the monomers in a continuous manner at elevated temperature and pressure with a catalyst based on a) a Group VIII metal compound, b) a halomonocarboxylic acid, c) a dentate ligand containing at least two phosphorus-, nitrogen- or sulphur-containing dentate groups which dentate ligand can form a complex with the Group VIII metal, and which catalyst contains less than 6 mol of component b) per mol Group VIII metal.
Patent CA-2038395-A1 (CA)
Title: System for controlling ambient pressure within an enclosed environment
Inventor: BRASWELL MARION M
IPC: G05D16/20
Filed: 1991-03-15
Abstract: ABSTRACT OF THE DISCLOSURE The present invention provides a system for controlling ambient pressure within an enclosed environment. The system is comprised of means for outputting a first signal, generally of a predetermined value. That signal is received in a detecting and comparing means which determines the relative change in the signal over time. Based upon the determination of the signal change, a second signal is generated. The second signal is received by an active device which is capable of altering the ambient pressure within the enclosed environment and responds to the second signal. -27-
Patent CA-2039719-A1 (CA)
Title: Device for extracting fluid or gaseous media supplied in containers like plastic compounds miscible in components and the like
Inventor: REITERBERGER GEORG
IPC: B01J4/02
Filed: 1990-08-21
Abstract: Abstract The invention relates to a device (1) for discharging liquid or gaseous materials supplied in containers (3,4), which can be connected between discharge nozzle (13) of the container and a line (7,8) for transferring the medium to a processing apparatus (5), wherein the unwanted egress of medium into the open is prevented and pressure build-up inside the transfer system will be accommodated by changes in volume inside the device.     Fig. 3 can also be used for the abstract.
Patent CA-2040884-A1 (CA)
Inventor: SOUVIE JEAN-CLAUDE
IPC: B01J23/44
Filed: 1991-04-19
Abstract: Process for the preparation of the compound of formula I: 
<IMAGE>
 characterised in that 2,3,4-trimethoxybenzaldehyde is dissolved, with piperazine, and the reaction mixture is then subjected to the action of hydrogen to form the compound of formula I.
Patent CA-2040911-A1 (CA)
Title: Use of lanthionines for control of post-processing contamination in food
Inventor: COLLISON MARK W
IPC: A23B4/22
Filed: 1991-04-22
Abstract: Disclosed is a method for inhibiting the contamination of heat-processed food products by pathogenic or spoilage microorganisms which method involves treating the surface of the food product with a lanthionine bacteriocin.
Patent CA-2041475-A1 (CA)
Inventor: WALTERS JAMES C
IPC: A01D34/66
Filed: 1991-04-30
Abstract: MODULAR CUTTERBAR FOR A ROTARY MOWER                   Abstract of the Disclosure A cutterbar includes a plurality of modules connected in end-to-end relationship with each other, the modules respectively including identical cast gear housing sections which cooperate to form a gear housing in which is located a spur gear drive train.  Each module includes a removably mounted cutting unit, with the cutting units having blade-carrying discs and being arranged such that the discs are indexed 90° relative to each other and in counter rotating pairs, when an even number of units are used to form a cutterbar but being arranged such that the leftmost and adjacent blade-carrying discs rotate in the same direction when an odd number of modules are used.  The construction of the leftmost module is such that the axis of rotation of the drive shaft of the cutting unit thereof is located rearwardly of a line of centers passing through drive shafts of the cutting units of the remaining modules whereby adequate clearance is provided between the paths of rotation of the cutting blades of the leftmost and adjacent cutting units. A unitary skid pan extends beneath and is connected to each of the modules and serves to both protect the housing sections from damage during operation and to support the modules during assembly and repair of the cutterbar.