baber/WOPTO huggingface dataset:
Patent CA-2041914-C (CA)
Inventor: MOK FELIX M
IPC: C01D5/16
Filed: 1991-05-07
Granted: 1997-12-30
Abstract: Process for separating sulphate from a contaminating chromium component contained in an aqueous liquor by the crystallization of a sulphate compound.  The sulphate may be separated substantially free of chromium component by adjustment of the pH to the range of from about 2.0 to about 6.5, followed by cooling of the liquor to precipitate the sulphate compound from solution which sulphate is subsequently removed.  The process provides an effective method for the separation of sulphate from dichromate, and is particularly useful in the production of chlorate.
Patent CA-2043405-C (CA)
Inventor: TAKATA YUKIO
IPC: B65D17/40
Filed: 1991-05-28
Granted: 1995-02-28
Abstract: An easily openable container comprises (a) a multilayer container body which includes an innermost layer and an adjacent layer contacting the innermost layer, a recessed portion and a flange and (b) a lid member melt sealed to the innermost layer of the multilayer container body at the flange, where the innermost layer and the adjacent layer are peelable from each other and having between them a peel strength smaller than the peel strength between the lid member and the innermost layer.  The flange has two circular notches made in the innermost layer, and the multilayer container body and the lid member are melt sealed between the two circular notches, with the proviso that a portion of the melt sealed area projects outwardly from the outer circular notch, and a depression is made in the innermost layer at the outermost edge of the projecting portion of the melt sealed area by pressing the innermost layer through the lid member.  Opening is performed by the peeling off the innermost layer together with the lid member from the adjacent layer of the multilayer container body between the two circular notch and begins easily by breaking the innermost layer at the depression at the outermost edge of the projecting portion of the melt sealed area.
Patent CA-2069129-C (CA)
Title: Reversible thermal recording medium and method of producing the same
Inventor: WATANABE NIRO
IPC: B41M5/333
Filed: 1992-05-21
Granted: 1999-07-27
Abstract: A reversible thermal recording medium having a core material capable of being change in state by heat and a recording layer including capsules containing this core material.  A repeatability corresponding to the limit of possible repeated recording/erasing effected by a physical or chemical change in the material constituting the recording can be obtained.  A deterioration in image quality caused by transfer of a part of the recording layer to the heating unit can be prevented and repeat characteristics can be improved, thereby limiting the running cost.
Patent CA-2070324-C (CA)
Title: Method and apparatus for removing waste paper from a continuous web of photographic prints
Inventor: DOLF RICHARD A
IPC: B26D5/34
Filed: 1992-06-03
Granted: 2003-08-12
Abstract: Disclosed is a method and apparatus for removing wastepaper (W) from a continuous web (2) of photographic paper upon which photographic images (P1, P2 . . . ) have been printed. Between each photograph there exists a cut mark (4) that instructs a photographic print cutter (1) where one photograph ends and an adjacent photograph begins. The method comprises advancing the web to a point where a cut mark is expected and sensing the presence or absence of a cut mark. If a cut mark is sensed, the web is advanced to align the cut mark under a cutting knife (8) and the cutting knife is cycled. If a cut mark is not sensed, the web is reversed a predetermined reverse length before the cutting knife is cycled. By reversing the web the predetermined reverse length, it is assured that any length of wastepaper cut from the web will at least be as long as the reverse length. The reverse length is long enough to prevent jamming of the print cutter.
Patent CA-2070332-C (CA)
Title: Method and apparatus for acceleration and deceleration control of a storage and retrieval machine
Inventor: DEVROY CRAIG A
IPC: B66F9/20
Filed: 1992-06-03
Granted: 1995-01-03
Abstract: A storage and retrieval machine having a base movable in opposite horizontal directions, a mast mounted on the base, and a carriage movable in opposite vertical directions on the mast.  A drive is also provided for moving the base and carriage in their respective opposite horizontal directions or opposite vertical directions.  A control is connected to the drive for transmitting to the drive for either the base or the carriage, a first signal for a fast acceleration rate in one of the opposite directions of movement, a second signal for a slow acceleration rate in the other of the opposite directions of movement, a third signal for a slow deceleration rate in one of the opposite directions of movement, a fourth signal for a fast deceleration rate in the other of the opposite directions of movement, and a direction signal to move in one of the opposite directions.  The drive is responsive to the control to move either one of the base and carriage in their associated opposite directions of movement and accelerate and decelerate the base or carriage in accord with the respective acceleration and deceleration rate signals for the movement direction.
Patent CA-2078189-C (CA)
Inventor: HADLACZKY GYULA
IPC: C12N5/071
Filed: 1992-09-14
Granted: 1999-12-14
Abstract: Non-human cell lines are disclosed which contain functional centromeres comprising human DNA sequences linked to a dominant marker gene. The centromeres are carried on stable chromosomes which carry no centromeres other than those comprising human DNA sequences. The cell lines can be used to isolate the chromosomes as well as for use in inserting genes into mammalian cells. Methods are taught for generating such cell lines from cell lines carrying dicentric chromosomes.
Patent CA-2082914-C (CA)
Title: Controller for controlling operation of at least one electrical load operating on an ac supply, and a method thereof
Inventor: CANTIN LUC
IPC: H02J3/08
Filed: 1992-11-13
Granted: 1996-01-16
Abstract: A controller is provided for controlling operation of at least one electrical  load operating on an AC supply having a typical frequency, the AC supply being provided via power transformers by an electrical power distribution grid. The controller is associated with the load and comprises an input interface for coupling the controller to the grid, a frequency detector for detecting the frequency of the AC supply and producing a signal indicative of the frequency, memory  modules  for  storing  preprogrammed  commands,  a frequency monitor for reading the signal indicative of the frequency and producing frequency data derived thereof, a selector for selecting at least one of the preprogrammed commands with respect to the frequency data, a control unit for producing at least one command signal representative of the selected preprogrammed commands, and an output interface including a device responsive to the command signal for controlling the load.  Therefore, the load can be controlled by means of the controller depending on the frequency of the AC supply.
Patent CA-2084009-C (CA)
Inventor: BOUIX HERVE
IPC: B65D45/14
Filed: 1992-11-27
Granted: 2003-07-29
Abstract: Le dispositif distributeur comporte une capsule d'obturation munie d'une ouverture de distribution (3), ladite capsule comportant un moyen de fermeture ayant sensiblement la forme d'un étrier (6) comprenant deux branches (7) réliées par une traverse (9) dont une zone sert à fermer ladite ouverture (3), lesdites branches étant munies, vers leur extrémité éloignée de la traverse, de moyens d'articulation (A) sur une partie fixée au récipient (1) ; ces moyens d'articulation (A) sont agencés pour permettre un déplacement de l'étrier (6) suivant la direction axiale (X-X) afin d'écarter la traverse (9) de ladite, ouverture (3). Le dispositif comporte des moyens de came (C), prévus entre les branches (7) de l'étrier (6) et une partie solidaire du récipient, propres à provoquer le susdit déplacement de l'étrier (6) suivant la direction axiale (X-X) ; les moyens d'articulation (A) de l'étrier (6) comprennent pour chaque branche un axe (16) à section transversale non circulaire propre à coopérer avec une fenêtre (17) de manière telle que, quelle que soit la position angulaire de l'axe, un contact suffisamment étroit soit établi entre l'axe (16) et la surface interne de la fenêtre (17) pour  éviter tout ballottement de l'étrier relativement au récipient, tout en autorisant le susdit déplacement suivant la direction axiale.
Patent CA-2088082-C (CA)
Title: Dynamic bit allocation for three-dimensional subband video coding
Inventor: HARTUNG JOHN
IPC: H04N7/30
Filed: 1993-01-26
Granted: 1999-01-19
Abstract: The present invention provides a method of coding a set of multi- level signals, such as video signals. The method comprises filtering the set of multi-level signals into one or more sets of multi-level sub-band signals; allocating a first quantity of bits for use in coding a first set of sub-band signals; coding the first set of multi-level sub-band signals using zero or more of the first quantity of allocated bits; allocating a second quantity of bits for use in coding a second set of sub-band signals, the second quantity of bits comprising zero or more of the first quantity of bits not used in coding the first set of multi-level sub-band signals; and coding the second set of multi-level sub-band signals using zero or more of the second quantity of allocated bits. Three examples of the method are provided. A hardware implementation involving the use of digital signal processors operating in parallel is also provided.
Patent CA-2094880-C (CA)
Title: File difference engine
Inventor: SQUIBB MARK
IPC: H04L29/08
Filed: 1993-04-26
Granted: 2005-09-13
Abstract: Inversion maintains duplicate files in safe places. A scan computer program creates a taken table of a file. The token table reflects the indices of successive segments of the file and the exclusive-or (XR) and cyclic redundancy check (CRC) products of the characters in each segment. An updated file is compared to the earlier file by comparing the XR and CRC products of segments in the updated file to the XR and CRC products in the token table. On detecting matching products for identical segments, the next segments are compared. On mismatch, the segment (window) for the updated file is bumped one character and new XR and CRC products generated and compared. The indices of the token table and the offsets from the start of the file of the first characters of the updated file matching segments are set forth in a match table. Next the updated file is scrolled through for the non-matching information determined by acting on the indices and offsets of the match table to form the transition table which is the match table and the updated file non-matching information. The transition table contains the delta information which may be sent to another location having a copy of the earlier file thereat: the whole updated file need not be sent there. A reconstruction program at the location looks at the transition table to determine where to get the characters for the copy of the updated file it is creating.
Patent CA-2095602-C (CA)
Title: Cold headed center vacuum drill bit
Inventor: MONTGOMERY ROBERT H JR
IPC: B21K5/02
Filed: 1991-11-26
Granted: 1996-10-08
Abstract: A drill bit(10) for drilling holes in a work surface including a hard wear-resistant insert (12) and a metal body (14) includ-ing a top working surface (16) of an irregular surface configuration having a slot (36) for retaining the hard wear-resistant insert (12). The body (14) having a metal grain structure substantially parallel with the contour of the body. In a preferred embodiment the body (14) is formed by cold-heading.
Patent CA-2095701-C (CA)
Title: Architectural joint system with arched cover plate
Inventor: NICHOLAS JOHN D
IPC: E04B1/68
Filed: 1993-05-06
Granted: 1995-06-06
Abstract: An architectural joint system is disclosed, which incorporates a slidably supported arched cover plate to span  the  open  space  between  two  relatively  movable structural units.   The edge margins of the arched cover plate are slidably received in housings, mounted at the adjacent corners of the structural units.   The housing assemblies are formed of base members and cover members assembled to define a narrow gap for the reception of a thin cover plate, and an enclosure for receiving the edges of the plate.  The cover members are uniquely designed to have an outwardly and upwardly convergent taper, extending over a substantial distance of at least about two times the thickness of the cover member.  The arched plate is of a shallow, upwardly convex contour, closely conforming to the long  convergent taper  of the  cover member.    The  new construction is a significant improvement over known arched cover  type  joint  systems,  in  that  it  presents  a substantially inconsequential deviation from a flat, planar surface of the adjacent structures, an important advantage in the construction of floors for hospitals and similar institutions.
Patent CA-2096277-C (CA)
Title: Surfactants as kraft pulping additives for reject reduction and yield increase
Inventor: LING TIEN-FENG
IPC: D21C3/02
Filed: 1993-05-14
Granted: 1997-08-26
Abstract: The present invention relates to a method for enhancing the penetration of cooking liquor into wood chips to form a Kraft pulp which comprises adding to the cooking liquor specific surfactants such as ethoxylated dialkylphenols and ethoxylated alcohols.
Patent CA-2106238-C (CA)
Title: Telecommunications answering feature method and apparatus
Inventor: FLORENCE LLOYD MALCOLM
IPC: H04M3/48
Filed: 1993-09-15
Granted: 2001-12-04
Abstract: In a telephone system, if the telephone set of a called party is unavailable, an incoming call may progress to become intercepted at an attendant position or at a voice features server. A call take back feature permits the called party to be aware of an intercepted call progress so that the called party may retrieve the incoming call by going OFF HOOK and conversing directly with the calling party. A call screening feature is also available. The call screening feature permits the called party to hear the calling party's voice during an intercepted call progress via an audible link to the intercepted call progress. The called party may, at his discretion, retrieve the incoming call from the intercepted call progress by going OFF      HOOK and conversing directly with the calling party.
Patent CA-2109614-C (CA)
Inventor: LAAKKO OSSI
IPC: B65G7/12
Filed: 1992-05-20
Granted: 2002-12-24
Abstract: The invention relates to a method for removing and installing rolls (2) in a paper machine or the like substantially in the longitudinal direction of the rolls, In the method, an auxiliary displacing means (3) is supported to a substantially horizontal sup-port structure of the paper machine or the like above the roll (2) to be displaced, the auxiliary displacing means being mounted to move along the support structure; one end of the roll (2) to be displaced is fixed to the auxiliary displacing means (3) so as to be suspended from it, and the other end of the roll is supported by a displacing device; and the roll (2) is then moved by the displac-ing device substantially in the direction of the longitudinal axis of the roll so that the auxiliary displacing means (3) fixed to one end of the roll moves along the support structure (1) while the roll to be displaced moves with it.
Patent CA-2113132-C (CA)
Inventor: POWELL TIMOTHY E
IPC: F24H9/20
Filed: 1994-01-10
Granted: 1997-08-19
Abstract: The external jacket structure of an electric water heater defines with the water storage tank portion thereof a hollow insulation space that horizontally circumscribes and extends across the top end of the tank.  A fiberglass foam stop block member is pressed between the tank and jacket and has a cutout area through which an immersion heating element end connector is exposed to a first jacket sidewall opening normally covered by a removable access panel.  A control panel mounted externally on the jacket above the first jacket sidewall opening has a bottom interior portion that downwardly overlaps a top portion of the cutout area and communicates therewith through a second jacket opening.  An electrical control component disposed in an upper interior portion of the control panel is operatively connected to the heating element end connector by electrical wiring extending from the control component sequentially through the control panel interior, inwardly through the second jacket sidewall opening, and through the foam stop block member cutout area.   The hollow insulation space between the tank and jacket is filled with a hardened foam insulation material injected into the insulation space through the jacket at a point thereon disposed outwardly of the exterior edge periphery of the foam stop block member.
Patent CA-2114465-C (CA)
Title: Method and apparatus for cooling surfaces
Inventor: JENSMA KLAAS
IPC: A61B18/02
Filed: 1994-01-28
Granted: 1999-12-21
Abstract: In methods and apparatus for cooling surfaces, a pressurized liquid refrigerant is dispensed through a shaped member composed of an open celled foam.  The method is particularly useful for localized freezing of a wart or other growth prior to its removal from skin of a human being or another animal.
Patent CA-2124083-C (CA)
Title: Preparation of substituted piperidines
Inventor: GODEK DENNIS MICHAEL
IPC: C07D213/75
Filed: 1992-11-24
Granted: 2001-08-14
Abstract: Novel processes are disclosed for the preparation and resolution of substituted piperidines of formula (I) wherein R1 and R2 are defined as below; and related compounds, as well as novel intermediates used in such processes.
Patent CA-2125100-C (CA)
Inventor: DUPUY RONALD E
IPC: B60J10/04
Filed: 1994-06-03
Granted: 1996-12-03
Abstract: A seal assembly for a movable window pane which is raisable or lowerable in a vehicle window opening includes a one-piece, closed-loop construction which is formed from two molded sealing elements secured together to form a sealing member adapted to be secured along the periphery of a window opening and to provide continuous sealing engagement with the interior and exterior periph-ery of the movable window pane.   The one-piece seal assembly  replaces  a plurality  of  individual  sealing components which are conventionally used to provide the weather  seal between a vehicle window opening and a movable window pane which slides up or down to open or close the window opening.           A method for forming a one-piece, closed-loop seal assembly includes the steps of molding an inner sealing element having a continuous, closed-loop struc-ture, molding an outer sealing element having a continu-ous, closed-loop structure, and then securing the sealing elements together to form a one-piece, closed-loop sealing member adapted to seal between a vehicle window opening and a window pane which can be raised or lowered within the opening.
Patent CA-2126405-C (CA)
Title: Power regulation for redundant battery supplies
Inventor: TAYLOR MARK A
IPC: G05F1/56
Filed: 1994-06-21
Granted: 1998-12-29
Abstract: A regulator circuit supplies a regulated low, DC voltage that is derived from an unregulated voltage provided by a pair of redundant batteries.  The regulator circuit comprises regulation control that responds to a feedback signal developed from monitoring the regulated voltage to maintain the regulated voltage at a desired level.  Battery monitors supervise the voltage levels of the batteries used, and shut down the regulator when the battery voltages drop below a predetermined voltage level to preserve battery life.
Patent CA-2129306-C (CA)
Title: Gas pipeline drip
Inventor: HAUKENESS MILES E
IPC: F17D1/00
Filed: 1994-07-29
Granted: 1997-02-18
Abstract: Know drips for gas transmission pipelines do not work effectively for two phase liquid-gas flows.  Disclosed is a drip having two parts;a flow separator and a receptacle.  The flow separator comprises a pipe having circumferential apertures in the wall.  Surrounding the pipe and the apertures is a shell that defines an annular passage between the pipe wall and the shell.  Annular gas liquid flow  entering the separator will be divided.  Most of the gas will pass the apertures and continue through the pipe.  Most if not all of the liquid and some gas will pass through the aperture.  It is then passed to a receptacle where the fluid is removed.  The secondary gas flow is then either recombined with the main flow or can be diverted to a secondary system. Periodically the liquid collected in the receptacle can be emptied.
Patent CA-2129552-C (CA)
Title: Improved optical mode mixer using fiber optic bundle
Inventor: KIM JAMES
IPC: A61B5/1459
Filed: 1993-01-28
Granted: 2004-05-11
Abstract: Improved optical mode mixers (52) for use in conjunction with optical fibers (64) and devices incorporating optical fibers are disclosed and claimed. The optical mode mixers (52) are formed from a coherent, orderly bundle of numerous small diameter optical fibers (64) in a longitudinally aligned, parallel array. The mode mixer (52) is optically linked to the fiber optic cable (36) and effectively reduces undesirable high order modes of light transmission while eliminating alignment sensitivity. The coherent fiber optic bundles may be as short as ten wavelengths of light in length and will have a diameter substantially equal to that of the fiber optic cable (36) to which they are coupled.
Patent CA-2129779-C (CA)
Inventor: CALVANI RICCARDO
IPC: H04B10/275
Filed: 1994-08-09
Granted: 1999-02-16
Abstract: ABSTRACT   A device for extraction and reinsertion of an optical carrier in an optical communication network includes a first optical circulator connected in series with the line in order to receive a signal stream including a carrier to be extracted, modulated by an information signal, and to transmit a signal stream including the same carrier, re-inserted into the stream after having being modulated with another information signal, and a second optical circulator connected to local information processing apparatus, to which it supplies the extracted carrier and from which it receives the carrier to be re-inserted. Between the two circulators there is an optical fibre bandpass filter that can be tuned to the carrier wavelength.
Patent CA-2140627-C (CA)
Inventor: CULLER GREGORY D
IPC: H05F1/00
Filed: 1992-09-18
Granted: 1999-11-30
Abstract: 2140627 9405496 PCTABS00030 A thermal control covering which is flexible and highly conformable and which is made of a thin substrate of porous expanded polytetrafluoroethylene which has a conductive film on one of its surfaces to provide a thin film (usually aluminum) at the surface. A  multilayer construction is made up by joining together a plurality of layers at intervals over the areal extent of the construction. The material is light, strong and has excellent drape characteristics, together with good thermal insulation properties, and is conductive due to contact of the conductive films of each layer caused by folding back tabular cut-outs of each layer.
Patent CA-2140817-C (CA)
Inventor: BRAUM MANFRED
IPC: C02F1/54
Filed: 1995-01-23
Granted: 2003-08-26
Abstract: Low-viscosity, water-soluble polymeric aqueous dispersions with high active substance concentrations containing a polymer (A), made up of water-soluble monomers (a1) and, optionally, amphoteric monomers (a2), as well as a polymeric dispersion agent (D) may be prepared by removing water during the polymerization of the polymer (A), in the presence of the polymeric dispersion agent (D) to afford the polymeric dispersion (PD'). In another embodiment, the process involves the addition of the polymeric dispersion agent (D) in aqueous solution to the polymeric dispersion (PD') in a second process stage, which leads to the polymeric dispersion (PD").