baber/WOPTO huggingface dataset:
Patent CA-1129156-A (CA)
Title: Bleaching stilbene yellow dyed wood pulp
Inventor: GUPTA MAHARAJ K
IPC: D21C9/14
Filed: 1980-01-28
Granted: 1982-08-10
Abstract: 4636 (a) CANADA     BLEACHING STILBENE YELLOW DYED WOOD PULP     ABSTRACT OF THE DISCLOSURE            Chlorine dioxide is a specific bleaching agent for stilbene yellow dye which has been used to dye paper stock. Chlorine dioxide may be used in amounts as low as 0.25% based on the oven dry weight of the pulp fiber.
Patent CA-1138933-A (CA)
Inventor: SCANNELL EDWARD F
IPC: G01R5/02
Filed: 1980-02-15
Granted: 1983-01-04
Abstract: ADJUSTABLE SPRING REGULATOR FOR               SETTING INDICATING INSTRUMENT POINTER                     ABSTRACT OF THE DISCLOSURE         Adjustment of an electrical measuring instrument of the D'Arsonval typs is achieved by rotation of an annular leaf spring contact mounted to rotate between an annular plate and a flanged eyelet extending through the plate and leaf spring.  A conducting coil spring attached to the spring contact transmits rotary orientation of the pspring contact to an armature as-sembly disposed for rotation against the return force of the coil spring in an magnetic field.
Patent CA-1136009-A (CA)
Inventor: MELAMED SIDNEY
IPC: C04B41/48
Filed: 1980-03-25
Granted: 1982-11-23
Abstract: - i -PATENT APPLICATION OF Sidney Melamed, Ronald W. Novak and Clarence J. Neyhart for COATING CONCRETE WITH LATEX POLYMERS              Abstract of the Disclosure It has been discovered that the adhesion of latex coatings to concrete surfaces can be significantly improved by prior treatment of the surface with an air curable, water soluble polymer.  Preferred water soluble polymers cure oxidatively in a manner similar to drying oils.
Patent CA-1103242-A (CA)
Inventor: GANDOLFI CARMELO
IPC: C07C401/00
Filed: 1980-05-15
Granted: 1981-06-16
Abstract: ABSTRACT OF THE DISCLOSURE       This invention relates to optically active compounds having the following general formula (I)                 (I) wherein R is a member selected from the group consisting of hydrogen, a C1-C12 alkyl group, and a cation of a pharmaceutically acceptable base; one of R1 and R2 is hydrogen and the other is hydroxy or acyloxy or R1 and R2 together form an oxo group; one of R3 and R4 is hydrogen and the other is hydroxy; R5 and R6 are independently selected from the group consisting of hydrogen, fluorine and C1-C4 alkyl, provided that when one of them is C1-C4 alkyl, the other is hydrogen or fluorine and when one of them is fluorine,  the other is C1-C4 alkyl; E is selected from the group consisting of -(CH2)n-, wherein n is an integer of 1 to 6, and -(CH2)n1-O-(CH2)n2-, wherein n1 and n2 are independently selected from the group consisting of zero, 1, 2 and 3,  ? is a member selec-ted from the group consisting of methyl, cycloalkyl containing 3 to 7 ring carbon atoms and optionally containing one or more ring oxygen or sulphur atoms; and phenyl unsubstituted or optionally substituted by one or more sub-stituents selected from the group consisting of halogen, C1-C4 alkoxy, phenyl, and trihalomethyl; and wherein the chains bound to the carbon atoms in the 8-and 12-positions  have a trans-configuration.  The compounds of formula (I) may be used for the same therapeutical indications as natural prostaglandins, with respect to which, however, they offer the advantage of not being sub-strates for the enzyme 15-prostaglandin dehydrogenase, which, as is known, quickly inactivates natural prostaglandins, and, furthermore, are charcter-ized by a more selective therapeutical action.
Patent CA-1119852-A (CA)
Inventor: BECK JAMES C
IPC: G09B9/30
Filed: 1980-07-14
Granted: 1982-03-16
Abstract: Abstract This disclosure describes a method and apparatus for a visual display system in a vehicle simulator to compensate for distortion and to maximize illumination in a projected image substantially at the same time.  then a spherical mirror (11) is interposed between a curved rear-projection screen (12) and a viewing position (10), certain distortions are developed which detract from realism.  Such distortions are compensated for by reflecting the image off a curved folding mirror (13) positioned so that its major axis (CL-2) is substantially perpendicular to the major axis (CL-l) of the curved rear-projection screen (2).  In accordance with the invention, when such compensation is achieved, the illumination of the projected image will be at substantially its brightest.
Patent CA-1134229-A (CA)
Inventor: FUNKE CRAIG D
IPC: F23L13/02
Filed: 1980-08-05
Granted: 1982-10-26
Abstract: FLUE BOX ASSEMBLY                   ABSTRACT OF THE DISCLOSURE           An improved flue box assembly for use with the exhaust gas conduit of a heating plant is provided having a housing with at least one pivotally mounted damper plate therein.  The damper plate is provided with a flue opening and at least one bore to permit the creation of a safe amount of back pressure to retain unburned fuel vapors within the heating plant, thereby maximizing fuel efficiency, while simultaneously preventing the build-up and stratification of unburned fuel vapors within the housing.
Patent CA-1124991-A (CA)
Title: Process for purifying metallurgical-grade silicon
Inventor: DIETL JOSEF
IPC: C01B33/037
Filed: 1980-08-15
Granted: 1982-06-08
Abstract: ABSTRACT OF THE DISCLOSURE A process is provided for purifying metallurgical-grade silicon for the manufacture of solar cells, wherein the acid treatment of the silicon, known per se, is com-bined with vacuum evaporation. This may be optionally combined with slag extraction and directional solidifi-cation.
Patent CA-1149265-A (CA)
Inventor: MILES JOHN H
IPC: B21C47/18
Filed: 1980-09-04
Granted: 1983-07-05
Abstract: ABSTRACT OF THE DISCLOSURE         A method and apparatus for uncoiling material such as wire, from a coil supported about a horizontal axis by a drum, including separating a loop from the coil, and bend-ing the leading end of the material upon its exit from a pinch roll unit so that it takes a path generally parallel to that of a predetermined passline, and straightening the material once the leading end passes through the straighten-er roll area. An end bender roll and two of the straighten-er rolls are mounted on a pivotal frame connected to a pis-ton cylinder assembly which causes the frame to be rotated through an arc in a direction to either bring the end bend-er roll into an operative position while the two straighten-er rolls are in an inoperative position, or to bring the end bender roll into an inoperative position while the two straightener rolls assume a nested relationship with a fourth roll in an operative position.
Patent CA-1148180-A (CA)
Inventor: WIRTH JOHANNES
IPC: G01G21/24
Filed: 1980-09-10
Granted: 1983-06-14
Abstract: ABSTRACT            Mass and force meter with a body, a load support, a load cell, an intermediate body mounted between said body and said load support and supported by said body over a number of supporting points, said load support being supported by said intermediate body over the same number of loading points, whereby said supporting and loading points are mounted pairwise in the same horizontal plane, said in-termediate body consisting of two rigid parts linked by two horizont-al, flexible parts mounted one below the other, said supporting and loading points being anchored to said rigid parts, said loading points being shifted horizontally by the same amount and in the same direction from said supporting points, whereby at least one spring, the resilience of which is much greater than that of said flexible parts, has one of its ends fitted into one of said rigid parts, its other end being linked with said load cell which is linked to the other rigid part.
Patent CA-1139282-A (CA)
Inventor: VAN BASSHUYSEN RICHARD
IPC: B60H1/08
Filed: 1980-09-12
Granted: 1983-01-11
Abstract: MOTOR VEHICLE HAVING A PASSENGER COMPARTMENT HEATING DEVICE            ABSTRACT OF THE DISCLOSURE    This invention relates to motor vehicles having passenger compartment heating devices.  The temperature of the cooling water of an engine  may be increased at idling speeds and low speed states by throttling the engine exhaust to increase fuel consumption.  A throttle device is controlled in ac-cordance with cooling water temperature and passenger com-partment temperature, in response to activation by manual control.  Manual control is overriden by an accelerator pedal actuated control when the load of the engine rises.  Heat is extracted from the engine cooling water by means of a heat exchanger, through which air is driven into the pas-senger compartment.  A brake is connected to an independently actuated device to throttle the exhaust to brake the engine.          This arrangement is particularly suitable for use with diesel engines.
Patent CA-1101057-A (CA)
Inventor: AKAMATSU MASAHIKO
IPC: H02M5/45
Filed: 1980-09-16
Granted: 1981-05-12
Abstract: ABSTRACT OF THE DISCLOSURE          A power converter comprises a plurality of electrical valve bridges, each of the plurality of electrical valve bridges having a plurality of electrical valves, a pair of DC input nodes, and a plurality of AC output nodes respectively connected to a plurality of AC input terminals of an AC load, each of the plurality of electrical valves being connected between one of the DC input nodes and one of the AC output nodes; a plurality of DC power control means, each of the plurality of DC power control means having a pair of pulsating output terminals connected to the pair of DC input nodes of each of the plurality of electrical valve bridges through one pair of a plurality of pairs of pulsating DC lines; pulsating direct currents being fed in different phase relation to the input nodes of the electrical valve bridges through the pulsating DC lines from the DC power control means and controlled by the DC power control means in synchronous relation with the control of the electrical valves; and a common DC line included in the plurality of said DC power control means to carry a current which is a combination of the pulsating direct currents; whereby the pulsating direct currents are converted to alternating currents for feeding the alternating currents to the AC load, and commutation of the electrical valves is assisted by pulsation of the pulsating direct currents.
Patent CA-1148370-A (CA)
Title: Engines, and particularly those incorporating  the stirling cycle
Inventor: LILJEQUIST JON L
IPC: F02G1/043
Filed: 1980-09-25
Granted: 1983-06-21
Abstract: ABSTRACT        A Stirling device or the like is physically arranged to both significantly reduce its size and weight relative to earlier designs as well as reduce fluid leakage into or out of the device's gas enclosure.  Size and weight reduction, as well as the elimination of fluid leakage, is achieved in several ways including that of moving the counterpart to the conventional Stirling crankshaft from outside of the working-gas enclosure to inside the working-gas enclosure.  In several embodiments of the invention, this rearrangement simultaneously eliminates a major source of fluid leakage.  In some designs of this disclosure, the Stirling working-gas enclosure, which consists of a power piston and cylinder, are replaced by a somewhat different appearing and thoroughly sealed working-gas enclosure that includes a bellows, this also assisting in reducing weight.          The Stirling displacer piston can also be modified, if desired, to direct the entrapped gas along different paths or routes depending on whether it is moving toward the expansion space or toward the compression space of the gas enclosure.
Patent CA-1149328-A (CA)
Inventor: JAIN SURENDAR M
IPC: B01D57/00
Filed: 1980-11-12
Granted: 1983-07-05
Abstract: ABSTRACT OF THE INVENTION           Apparatus and process for the fractionation of liquid solutions of protein mixtures which includes the steps of subjecting such solutions to electrodialysis (ED) while in the pH range of about between 5-6 until a partial or a substantially complete desalting takes place, the ED preferably being conducted between about 15°C to 40°C. separating the fraction of protein which precipitates, passing the resulting supernatant salt depleted protein mixture into the concentrating compartments of the ED apparatus whereby the salts entering the salt concentrating chambers from the adjacent salt diluting chambers will substantially restore the original salt content of the desalted protein mixture.
Patent CA-1160389-A (CA)
Inventor: CHIU SHUI-TUNG
IPC: C08L97/02
Filed: 1980-11-17
Granted: 1984-01-10
Abstract: ABSTRACT OF THE DISCLOSURE     A pre-cure resistant liquid phenol-formaldehyde resin binder composition having low viscosity and low surface tension for efficient spray application as fine droplets in waferboard manufacture comprising a highly condensed  and cross-linkable phenol-formaldehyde resin of relatively high average molecular weight and a non-resinous methylolated phenol condensate having an average molecular weight of 200-300.
Patent CA-1143231-A (CA)
Inventor: KAUFMAN VERNON R
IPC: F02M17/04
Filed: 1980-12-08
Granted: 1983-03-22
Abstract: FUEL SUPPLY METERING ARRANGEMENT                ABSTRACT OF THE DISCLOSURE    A carburetion system for an internal combustion engine having improved fuel metering is disclosed and includes a fuel supply conduit which is formed in a por-tion of the body of the carburetor extending from a fuel source to the carburetor bore with that carburetor body portion having a first linear temperature coefficient of expansion.  A mixture control member formed of a material having a second linear temperature coefficient of expan-sion engages the body in a first region and defines relative to the carburetor body in a second remote region a fuel metering orifice for controlling fuel flow through the fuel supply conduit.  The mixture control member may be moved relative to the first and second regions to change the fuel to air ratio supplied to the engine.    Employing a fuel metering orifice in the adjustable fuel metering arrangement, the minimum flow area of which has a simply connected convex cross sectional configuration, minimizes the adverse effects of ambient temperature changes.  The carburetor includes a one-way check valve in series between a fuel source and a fuel discharge nozzle comprising a valve housing having a fuel inlet coupled to the fuel source and a fuel outlet coupled to the discharge nozzle with a valve ball captive within the housing and movable between a closed position adjacent to the fuel inlet and an open position laterally dis-placed relative to the path of fuel flow through the valve housing.
Patent CA-1176563-A (CA)
Inventor: ANDARY THOMAS J
IPC: A61P7/00
Filed: 1981-01-16
Granted: 1984-10-23
Abstract: Abstract of the Disclosure This is an improved method for producing activated prothrombin complex concentrate which comprises control-ling the degree of activation by determining the activa-tion state of the starting material and then varying at least one of the activation conditions in accordance with analyses  of the progress  of activation of the starting material to arrive at a predetermined activa-tion level.     Compositions including,  in units/ml,  factor VIII correctional  activity,  about  from 2-35; prothrombin, about from 1-10; thrombin, less than about 0.003; factor VII, about from 37-190; factor VIIa, about from 8-80; total factor IX, about from 15-112; factor IX precursor, 0 to about 30; factor X, about from 1-30; and factor Xa, about from l-10 are used in therapeutically effective amounts to treat blood clotting factor inhibitors.
Patent CA-1150881-A (CA)
Inventor: KOPCHIK RICHARD M
IPC: C08L51/00
Filed: 1981-02-06
Granted: 1983-07-26
Abstract: Abstract of the Disclosure Disclosed herein are blends of imide containing polymers and vinyl chloride polymers and copolymers.
Patent CA-1156318-A (CA)
Inventor: SCHNEIDER FRANZ
IPC: B23K11/24
Filed: 1981-02-11
Granted: 1983-11-01
Abstract: ABSTRACT     Longitudinal seams in cans are welded using a resistance-welding machine having a pair of roller electrodes which engage overlapping portions of the cans as they are conveyed past the electrodes.  Welding power in the form of an approximately square wave the frequency of which is related to the number of cans passing the electrodes in a particular time interval specifi-cally each half-wave or half-cycle lasts as long as it takes for a can to pass the electrodes.  The half-cycles may alternate from can to can or may be unidirectional square waves.  A higher frequency current component may be superimposed on the basic square wave.  Current passed through each can is unidirectional and essentially constant but the overall supply is pulsed and may be alternating and so that the process is a quasi direct-current welding process with advantages deriving from both d.c. and a.c. techniques.
Patent CA-1175499-A (CA)
Inventor: BESOCKE KARL H
IPC: G01J1/36
Filed: 1981-04-14
Granted: 1984-10-02
Abstract: ABSTRACT OF THE DISCLOSURE Disclosed is apparatus for modulating the optical transmittance of a radiation beam path which avoids the necessity for a high voltage source of some prior art devices (using the Kerr effect) and avoids the use of rotary parts used in other devices with their disadvantage of limited bearing life.  The apparatus comprises a piezoelectrically driven member having a free extremity arranged to be driven towards and away from an adjacent path of a radiation beam in response to electrically controlled deformation of a piezoelectric element.  The free extremity of the driven member carries a body having a transmissivity for the radiation of the beam which is different from that of the adjacent portion of the beam path.          The piezoelectric element is connected to an electrical circuit which causes it to deform to move the body towards and away from the beam path. The rest position of the body may be adjusted by including a source of d.c. bias in the electrical circuit.
Patent CA-1160172-A (CA)
Inventor: MCCOY DAVID R
IPC: C10G1/04
Filed: 1981-05-21
Granted: 1984-01-10
Abstract: ABSTRACT OF THE DISCLOSURE A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsi-fiers are used.  These demulsifiers are polyols of 2 and greater  functionality  containing  predominantly  mixed ethylene oxide and propylene oxide wherein the ethylene oxide content of the polyol (by weight) is greater than about 70% but less than about 95%.  The molecular weight of these polyols  is  greater than about 10,000.  To resolve the bituminous petroleum emulsions, the process is carried out between 25 and 120°C wherein the demulsifier of the invention is contacted with the bituminous emulsion.
Patent CA-1182027-A (CA)
Inventor: HOUSE ROY F
IPC: C09K8/20
Filed: 1981-05-22
Granted: 1985-02-05
Abstract: Background of the Invention The present invention relates to compositions for use as thickening agents in aqueous systems and to aqueous well servicing fluids prepared therefrom.    Thickened aqueous mediums, particularly those containing oil field brines, are commonly used as well servicing fluids such as drilling fluids, workover fluids, completion fluids, packer fluids, well treating fluids, subterranean formation treating fluids, spacer fluids, hole abandonment fluids, and other aqueous fluids in which an increase in viscosity is desired.  It is known to use hydrophilic polymeric materials as thickening agents for aqueous  mediums used in such well servicing fluids. However, many hydrophilic polymers are not readily hydrated, solvated or dispersed in aqueous systems without elevated temperatures and/or mixing under high shear for extended periods of time. For example, many such polymers are poorly   hydrated,  solvated or dispersed in aqueous solutions containing one or more multivalent cation water soluble salts, such as heavy brines which are commonly used in well servicing fluids.   In many cases, as for example in workover operations, the equipment available for preparing the well servicing fluids does not readily lend itself to high temperature, high shear mixing.  Accordingly, it is usually necessary, if it is desired to use such thickened brines to prepare them off the well site.
Patent CA-1156823-A (CA)
Inventor: GOWANLOCK THOMAS W
IPC: B23B27/04
Filed: 1981-07-24
Granted: 1983-11-15
Abstract: FACE GROOVING TOOL              ABSTRACT OF THE DISCLOSURE      A face grooving tool is disclosed for machining circular grooves in a metal workpiece.  More particularly, a face grooving tool includes an elongated shank having an arcuate support blade projecting axially outwardly from one end thereof.  The leading surface of the support blade includes an offset V-groove configuration, with the vertex thereof being located nearer to the radically inner surface of the support blade than the radially outermost portion of a cutting insert, which is receivable in the offset groove, is provided with added support during a cutting operation.  The arcuate configuration of the support blade enables the blade to be received in the circular groove being machined in the workpiece thereby providing continuous support for the insert.
Patent CA-1173822-A (CA)
Inventor: LYONS WILLIAM C
IPC: E21B7/08
Filed: 1981-09-18
Granted: 1984-09-04
Abstract: APPARATUS FOR DRILLING STRAIGHT   PORTION OF A DEVIATED HOLE     Abstract of the Disclosure A guide for drilling a straight section of a bore hole de-flected from the vertical.  The apparatus comprises either a normally straight or a curved-straight tubular member which has a plurality of generally circumferential cuts disposed along the length of the guide.  The cuts allow the guide to be bent sufficiently to enter and traverse a short radius curve and then return to its normal configuration for guiding the drilling of the straight portion of the deflected bore hole.  A clutch mechanism disposed in the drill guide permits engagement of the guide by the drill string for orientation of the guide.
Patent CA-1161506-A (CA)
Inventor: SPARBER RICHARD G
IPC: H04M19/00
Filed: 1981-09-23
Granted: 1984-01-31
Abstract: PRECISION NEGATIVE IMPEDAMCE                 CIRCUIT WITH CALIBRATION     Abstract of the Disclosure A negative impedance circuit comprising a level shifter and a current mirror, includes calibration circuitry for adjusting the negative impedance to provide the precise amount of current required to compensate for current drain caused by a known impedance at varying voltage levels.  A divider/multiplier circuit is connected to the line which has the known impedance and provides a signal which is directly proportional to the voltage level on the line to the level shifter which, in turn, provides a corresponding control current to the current mirror.  The current mirror provides a proportional current to the line current supplied by the current mirror and may be measured at a calibration resistor and the divider multiplier circuit may be adjusted to the appropriate ratio until the exact amount of current required to offset the drain to the precision resistor is provided by the current mirror.
Patent CA-1158727-A (CA)
Inventor: WHATLEY ROGER A
IPC: H03F3/213
Filed: 1981-11-23
Granted: 1983-12-13
Abstract: DRIVER CIRCUIT HAVING REDUCED CROSS-OVER DISTORTION                      ABSTRACT     A driver circuit (10) suitable for use in an operational amplifier, includes a bipolar pull-up transistor (36) which sources current to an output terminal (38) in proportion to an applied drive current, and an MOS pull-down transistor (48) which sinks current from the output terminal (38) in proportion to an applied control voltage.  An MOS drive transistor (32) provides a constant drive current for the pull-up transistor (36), and an MOS shunt transistor (44) shunts the drive current away from the bipolar transistor (36) in proportion to the control voltage.  A cross-over compensation circuit (14) develops a predetermined bias voltage on the base of the bipolar transistor (36) relative to the voltage on the output terminal (38), to assure a minimum level of operation of the bipolar transistor (36) when the output terminal (38) is near the analog ground voltage.