baber/WOPTO huggingface dataset:
Patent CA-2031101-C (CA)
Inventor: ALLEY ROBERT PHILBRICK
IPC: H01H9/54
Filed: 1990-11-29
Granted: 2002-01-01
Abstract: A microprocessor-based relay system is used in combination with relay contactors and a control circuit therefor to protect an electric motor from overload currents in addition to phase faults, ground faults, load losses, and load jams. The microprocessor is provided with a data base comprising thermal characteristics of the motor during heating and cooling. The heating data comprise current versus time curves stored as a look-up table for which each data point represents a thermal limit, i.e., the maximum time the motor is permitted to operate at a particular current level. The cooling data comprise motor cooling rates. Phase currents are sampled at preselected fixed time intervals during a predetermined period thereof, and an average motor current value is calculated therefrom. A thermal sum, which is initialized at zero upon first starting the motor, is adjusted depending on the average motor current value relative to a predetermined overload current value. The average motor current value is used as an index to the heating curve look-up table. If the thermal sum exceeds the corresponding thermal limit in the look-up table for a predetermined time interval, then an overload condition is indicated, and the relay is tripped.
Patent CA-2032586-C (CA)
Title: Bushing for oil film bearing
Inventor: SIMMONS THOMAS E
IPC: F16C13/02
Filed: 1990-12-18
Granted: 1993-09-14
Abstract: ABSTRACT OF THE DISCLOSURE    A bushing for an oil film bearing assembly has a plurality of hydrostatic oil recesses in its internal bearing surface at the load zone.  Each recess is defined by the intersection of a double curved surface of revolution with the bearing surface, the recess thus being in the form of a portion of a prolate spheroid, with a substantially elliptical feathered peripheral edge.
Patent CA-2034802-C (CA)
Title: Arrangement and method for rapidly detecting double talk in long distance telephone communications system
Inventor: SANO HIDEO
IPC: H04M1/60
Filed: 1991-01-23
Granted: 1995-01-03
Abstract: ABSTRACT OF THE DISCLOSURE       Double talk is rapidly detected for effectively preventing degradation of echo cancellation in a long distance telephone communications system.  An echo estimator includes a transversal filter and receives an incoming signal and tap coefficients, and then adaptively produces an estimated echo signal.  A subtractor is adapted to subtract the estimated echo signal from an echo signal applied thereto, and outputting an error signal indicating residual echo.  A tap coefficient updating circuit is coupled to receive the error signal and the incoming signal and the tap coefficients, and renews the tap coefficients.  A double talk detector is coupled to receive the error signal and the incoming signal and the echo signal.  The double talk detector issues a double talk detection signal in the event that a cross-correlation value between the incoming and echo signals is less than a first predetermined level while an estimated echo cancellation is larger than a second predetermined level.
Patent CA-2036701-C (CA)
Inventor: KATO CHIAKI
IPC: C23C2/02
Filed: 1991-02-20
Granted: 1996-09-24
Abstract: The zinc or zinc-alloy plated steel sheet having improved weldability comprises an extra low carbon steel sheet, an iron-carbon plated layer or a carbon-rich layer generated by diffusion of the iron-carbon plated layer on at least one major surface of the extra low carbon steel sheet, and a zinc or zinc-alloy plated layer on the iron-carbon plated layer or the carbon-rich layer. The zinc or zinc-alloy plated steel sheet having improved weldability and/or plating properties is produced by depositing on the steel sheet an iron-carbon plated layer having a carbon content of from 0.01% by weight to 10% by weight to a coating weight of from 0.01 g/m2 to 10 g/m2, optionally annealing the iron-carbon plated steel sheet, and depositing a zinc or zinc-alloy plated layer, preferably by galvanizing or galvannealing, on the annealed steel sheet.
Patent CA-2036780-C (CA)
Title: Method for the preparation of sweetening agent delivery systems containing polyvinyl acetate
Inventor: KILLEEN MICHAEL J
IPC: A23L27/00
Filed: 1991-02-20
Granted: 1997-05-13
Abstract: The present invention pertains to a method for preparing a stable sweetening agent delivery system which comprises  the  steps  of  (A)  providing  the  following ingredients in percentages by weight of the sweetening agent delivery system (a) at least one solid natural or artificial high intensity sweetening agent present in an amount from about 0.01% to about 50%,  (b) an emulsifying agent present in an amount from about 0.5% to about 20%, and (c) polyvinyl acetate present in an amount from about 40% to about 93% and having a molecular weight range from about  2,000  to  about  14,000,  and  (B)  coating  the sweetening agent with a polyvinyl acetate matrix coating and granulating the coated sweetening agent by a method which comprises the steps  (a) melting and blending the polyvinyl acetate with the emulsifying agent and mixing the  sweetening  agent  therein  to  form  a  homogeneous mixture in a heated mixing bowl containing a discharge valve in a Double Planetary Mixer,  (b) transferring the mixing bowl  containing  the  homogeneous  mixture  to  a Direct Discharge System containing a hydraulic discharge platen,  adapted  to  fit  inside  the  mixing  bowl,  and hydraulically discharging  the mixture  from the  mixing bowl through the discharge valve into an air and water cooled Hot Melt Granulator,  (c) granulating the mixture into particles in the Hot Melt Granulator,  (d)  cooling and  transferring  the  particles  from  the  Hot  Melt Granulator to an Oscillating Granulator by passing the particles  through  a  Cyclone,  and  (e)  granulating the particles  in  the  Oscillating  Granulator  to  a  final desired particle size.
Patent CA-2039859-C (CA)
Title: Hand supported berry receptacle
Inventor: MESZAROS WILLIAM A
IPC: A01D46/22
Filed: 1991-04-05
Granted: 1994-04-19
Abstract: HAND SUPPORTED BERRY RECEPTACLE            ABSTRACT OF THE DISCLOSURE         Normally berries are picked by one hand and transferred to a container held in the other hand or suspended from the belt or hanging around the neck and often berries slip from the fingers while transferring the berries to the container.   The present device is a small container attached to the hand used for picking the berries, in a such way that the berries all fall into the container whether picked by the thumb and forefinger or stripped by the thumb and forefinger and middle finger of the hand.   It is provided with a cutout portion on one side into which is engaged the edge of the hand adjacent to the fourth finger and adjustable straps support the container or cup from the forth finger and around the thumb and wrist of the hand so that the container hangs substantially below the third or ring finger so that all the berries drop into the container.
Patent CA-2045035-C (CA)
Title: Method and apparatus for heat-strengthening glass sheets
Inventor: VEHMAS JUKKA HEIKKI
IPC: C03B27/044
Filed: 1991-06-20
Granted: 2002-02-26
Abstract: The invention relates to a method and apparatus for heat-strengthening glass sheets. A glass sheet heated close to a softening temperature is heat strength-ened by cooling it at a certain controlled cooling rate. The cooling is effected in a space between cooling panels (9) and the cooling panels are cooled by a gas jet which is applied to the surfaces of cooling panels (9) facing away from the glass sheet. A cooling space temperature measurement can be used for controlling the power of a cooling jet.
Patent CA-2046136-C (CA)
Title: Film cassette with exposure status indicator
Inventor: PAGANO DANIEL M
IPC: G03C3/00
Filed: 1991-07-03
Granted: 1995-06-20
Abstract: A film cassette comprises a film spool supported inside a lighttight cassette shell for rotation to thrust a filmstrip coiled about the spool to the exterior of the shell whether the filmstrip is unexposed or is only partly exposed, and a film exposure status indicator supported for movement relative to the shell from an unexposed position to respective partly exposed and fully exposed positions for providing visible indications that the filmstrip is only partly exposed or is substantially exposed.  According to the invention, the shell includes respective indicia indicating that the filmstrip is only partly exposed and is substantially exposed and respective windows located proximate the indicia, and the status indicator is configured in relation to the windows to be visible at the window proximate the indicia indicating that the filmstrip is only partly exposed when the indicator is in its partly exposed position and to be visible at the window proximate the indicia indicating that the filmstrip is substantially exposed when the indicator is in its fully exposed position.
Patent CA-2047108-C (CA)
Title: Guiding guard for crawler tracks
Inventor: FENTON DAVID STANLEY
IPC: B62D55/084
Filed: 1991-07-16
Granted: 1996-09-24
Abstract: A  guiding  guard  assembly  for  a  crawler  track vehicle is  relatively  easy  to  install  initially  as  a "retrofit  kit",  and  can also  be  easily  removed  and replaced as needed.  Furthermore,  the  guiding guard does not obstruct idler bearings of the lower run of the track, thus permitting easy servicing.  A plurality of transverse supports   are   secured   to the  vehicle  and  disposed transversely   of   each   crawler   track   and   spaced longitudinally  apart.  Structure  for  locating  a  guiding guard member on each side of each crawler track relative to  the  transverse  supports  is provided so that a lower face of each guiding guard member is spaced closely to a lower  run  of  each  crawler  track  to  resist  excessive twisting of the  track.  Support  portions  secured  to  the transverse  supports  and  guard  portions  secured  to  the guiding  guard  members  have  inclined  locating  surfaces which  cooperate  with  each  other  to  prevent  relative movement between the guiding guard member and the supports when secured together.
Patent CA-2048732-C (CA)
Inventor: COTTON JAMES D
IPC: D04H1/70
Filed: 1991-08-08
Granted: 2001-05-08
Abstract: The present disclosure is directed to a nonwoven web useful for a wiper having an oil capacity greater than about 500 percent by weight of oil to the weight of the web. The wiper includes a nonwoven web of fibers having at least one raised surface area which area has an aperture through the web. The fibers generally adjacent the aperture are substantially unconsolidated, i.e., not compacted together or fused.      The disclosure also deals with a method of forming such a nonwoven wiper. The method includes the steps of: a) providing a nonwoven web; b) providing a nip roller arrangement including a first roller having a plurality of unheated pins and a second roller having a plurality of corresponding orifices; and c) passing the web through the nip roller arrangement to form a plurality of raised surface areas on the web with each of the surface areas defining an aperture where the fibers generally adjacent the aperture are substantially unconsolidated.
Patent CA-2052002-C (CA)
Title: Valve
Inventor: MURPHY ROGER W
IPC: F16K5/04
Filed: 1991-09-23
Granted: 1994-09-20
Abstract: A three-piece angle stop valve comprises a valve body, resilient control  sleeve  and  handle,  with  no  separate fastening or sealing elements required.  Inlet line pressure resiliently biases the side walls of the control sleeve and a circumferential sealing flap formed thereon into sealing engagement with the valve bore to prevent leakage.   The handle is secured to the valve body by resilient formations which snap into a circumferential groove on the valve body. The  handle  rotates  the  control  sleeve  by  means  of telescoping  splines.   Several  circumferential  and  axial reinforcing ribs are formed in the interior of the control sleeve.  A collar having a tapered rim in the valve body piercingly engages a corresponding tapered section on the resilient control sleeve to additionally secure the control sleeve against axial downstream movement in the valve body.
Patent CA-2052083-C (CA)
Inventor: KOSCHITZKY HENRY
IPC: E04D1/20
Filed: 1991-09-23
Granted: 1996-05-21
Abstract: A method of making roofing shingles in several lanes in which, after the asphalt saturated base sheet is covered with a first granule layer, a pattern of asphalt patches is printed on each lane and contrasting colour granules are adhered to the patches.  Each patch pattern repeats each shingle length but is non-symmetric about the centre line of the length of each shingle. When the sheet is cut into shingles, the shingles from each lane have a different patch pattern from the other lanes. The shingles are assembled in bundles containing shingles from at least two lanes and approximately equal numbers of the patch patterns are located on opposite sides of the bundle to make sure the bundle is not tilted. The patch pattern is such that when each shingle is cut into tabs (thirds), at least one and preferably two tabs from each shingle has its centre free of patches, enabling the tab to bend over a ridge with less risk of cracking. Preferably no patches are located at the lines where the shingles are cut into tabs.
Patent CA-2057061-C (CA)
Title: Use of selected oleophilic ethers in water-based drilling fluids of the o/w emulsion type and corresponding drilling fluids with improved ecological acceptability
Inventor: MUELLER HEINZ
IPC: C09K8/26
Filed: 1990-05-07
Granted: 2003-12-16
Abstract: The use is disclosed of at least substantially water-insoluble ethers which are fluid and/or at least plastically deformable at working temperature and have flash points of at least 80°C, of mono- and/or polyfunctional alcohols of natural and/or synthetic origin or corresponding solutions of such ethers in ecologically acceptable water-insoluble oils as the dispersed oil phase of water-based O/W-emulsion drilling fluids which are suitable for the environmentally acceptable development of geological formations and which contain, if desired, insoluble, finely particulate weighting agents for the formation of water-based O/W-emulsion drilling muds and/or further additives, such as emulsifiers, fluid-loss additives, wetting agents, alkali reserves and/or auxiliary substances for the inhibition of drilled rock of high water-sensitivity.
Patent CA-2063640-C (CA)
Inventor: ROUFFET DENIS
IPC: H04H40/90
Filed: 1992-03-20
Granted: 1995-11-28
Abstract: L'installation de télévision directe par satellites est apte à intéresser au moins deux zones de couverture. En début de vie, en standard actuel, seuls deux satellites bi-faisceaux sont utilisés avec, pour cinq canaux, chacun douze amplificateurs, de canal et de redondance. Lors de l'intro-duction ultérieure progressive de la télévision haute-définition, ces amplificateurs seront couplés en parallèle deux à deux et au moins un troisième satellite, identique aux deux premiers, sera lancé quand les besoins l'exigeront.
Patent CA-2071028-C (CA)
Title: Helicopter rotor blades
Inventor: PERRY FREDERICK JOHN
IPC: B64C27/467
Filed: 1992-06-12
Granted: 2002-10-29
Abstract: Tn a helicopter rotor blade having a root end for attachment to a rotor head, a central portion of constant chord dimension and a tip portion having a chord dimension greater than that of the central portion, an outboard region of the central portion has a negative basic pitching moment coefficient, an inboard region of the central portion has a basic pitching moment coefficient more positive than that of the outboard region and the tip portion has a positive basic pitching moment coefficient.
Patent CA-2072121-C (CA)
Inventor: CLAWSON CARL WILLIAM
IPC: G08G5/02
Filed: 1991-01-25
Granted: 1999-09-28
Abstract: Système d'atterrissage de précision pour avions comprenant au moins quatre récepteurs placés séparément les uns par rapport aux autres (Rx1, Rx2, etc.). Chaque récepteur comporte un chronomètre destiné à mesurer précisément le laps de temps qui s'écoule entre la détection par le récepteur d'un signal émis par un interrogateur (Tx) et un signal de réponse émis par un répondeur (B) situé à bord de l'avion (16). Une unité centrale (CPU) située à une station de base utilise les mesures de temps fournies par les récepteurs pour calculer la position de l'avion. La station de base peut également calculer le temps de réponse du répondeur. On utilise de préférence des calculs à filtrage d'estimations pour améliorer l'exactitude. La position de l'avion est comparée à la description mathématique d'une voie d'approche désirée; l'erreur de position est alors déterminée et immédiatement communiquée à l'avion.
Patent CA-2074624-C (CA)
Title: Solid elastomeric block copolymers
Inventor: COOLBAUGH THOMAS SMITH
IPC: C08F8/00
Filed: 1992-07-24
Granted: 2003-09-23
Abstract: There are disclosed novel, solid, elastomeric block copolymers with improved resistance to cold flow wherein either 1) the terminal blocks are polymers of at least one conjugated diene I, e.g., isoprene, which contains at least five carbon atoms with at least one of each pair of double-bonded carbon atoms in the polymerized diene I units being additionally single-bonded to two carbon atoms, at least one middle or interior block is a polymer of butadiene, and at least one middle or interior block is a polymer of at least one aryl-substituted olefin, e.g., styrene; or 2) the terminal blocks are random copolymers of at least one diene I as previously defined and butadiene, and at least one middle or interior block is a polymer of at least one aryl-substituted olefin.       The invention also encompasses the selective hydrogenation of the foregoing polymers such that substantially all of the residual double bonds of the polymerized butadiene units are hydrogenated while a sufficient number of polymerized I units remain unsaturated to provide a basis for subsequent vulcanization or cross-linking.
Patent CA-2076741-C (CA)
Title: Pulse cathodic protection system
Inventor: DONIGUIAN THADDEUS M
IPC: C23F13/04
Filed: 1992-08-24
Granted: 1998-05-19
Abstract: A circuit and method of cathodically protecting ferrous metal  structures such as pipelines or well casings is described disposed in a conductive medium such as the ground.  A pair of terminals are connected to an  anode  spaced from the  structure and to the structure.   A source of d.c. voltage is periodically connected across the terminal to cause current to flow to the anode and provide electrons at the surface of the structure to inhibit ferrous molecules from going into solution and damaging the integrity of the structure. The current flow due to the induced emf caused by the reactive  inductions  of the anode/cathode  system is limited  to  inhibit  damage  to  neighboring  ferrous structures by providing a high impedance, e.g. an open circuit,  between the input terminals during all or part of the time that the d.c.  source is not  supplying current to the anode/cathode load.
Patent CA-2079245-C (CA)
Inventor: GROLL PETER
IPC: C08J5/18
Filed: 1992-09-28
Granted: 1997-06-03
Abstract: The invention relates to thermoplastic polyurethane elastomers obtainable by inaction of a) unmodified and/or modified   organic   polyisocyanates,   preferably   4,4'-diisocyanatodiphenylmethane, with b) polyoxybutylene glycols and/or  polyoxybutylene/polyoxyalkylene  glycols  with  a molecular weight of from 150 to 1800 and a content of crown ethers, preferably those of the formula (-CH2CH2CH2CH2O-)m, where m is from 3 to 6, not exceeding 0.06% of the total weight and c) chain extenders with a molecular weight of from 60 to 400, preferably 1,4-butanediol, to a process for the preparation thereof and to the use thereof for producing molded articles and sheets for use in the medical or hygiene sector and in the foodstuffs sector.
Patent CA-2084558-C (CA)
Title: Weld overlay device and method for curved article
Inventor: CAPITANESCU DAN
IPC: B23K9/04
Filed: 1992-12-04
Granted: 1995-08-22
Abstract: A method of applying a welded overlay to the interior surface of curved hollow articles such as 90 degree elbows utilizing a submerged arc welding gun curved to follow the radius of the hollow article and comprised of an elongated cylindrical body and a curved weld head, welding tip holder and welding tip, and incorporating a flux conveying system and a plurality of air release slots by which the flow of flux to the weld area is controlled. A first series of overlapping welds is applied longitudinally to the interior surface of the hollow article to cover 90 degrees of the surface therein. The article is rotated and a second series of overlapping welds are applied 180 degrees from the first series and again covering 90 degrees of the interior surface. A third series of overlapping welds are applied beginning at either of the end welds of the first series and covering 90 degrees of the interior surface. A fourth and final series of overlapping welds are applied, 180 degrees from the third series, covering the remaining 90 degrees of the interior surface.
Patent CA-2085635-C (CA)
Title: Thin wall pipe for abrasive materials flowing under high pressure and method of fabricating the pipe
Inventor: KLEMM ROBERT E
IPC: F16L9/02
Filed: 1992-12-17
Granted: 1995-09-12
Abstract: A thin wall mild carbon steel pipe for pump-ing concrete has a wall which has an internal diameter of five inches and a wall thickness in the range of 0.170 to 0.200.  The composition of the pipe wall by weight is in percentages ranges of 0.27 to 0.34 carbon, 0.60 to 0.90 manganese, less than 0.30 silicon with only traces of phosphorus and sulfur.  The pipe has an inner hardened wall portion of RC reading of about 60 and of a thickness in the range of 0.04 to 0.06 inches and a gradual transi-tion in hardness therefrom to an outer ductile wall reading of about 30 RC.  The unhardened mild carbon steel pipe is processed by progressively and successively heating axially annular portions of the pipe to a hard-ening temperature of 1650°F.  A quenching brine solution at a temperature below 50°F. is immediately sprayed at a high velocity onto the progressively heated surface to reduce the temperature of the inner wall essentially instantaneously to the temperature of the brine solution. This hardens the inner wall to a depth of about 0.04 to 0.06.  The brine solution in a five inch pipe is pumped at 150 gallons per minute and 100 feet per second.
Patent CA-2086298-C (CA)
Inventor: LEVALLOIS EMILE
IPC: F04D31/00
Filed: 1992-12-24
Granted: 2004-06-08
Abstract: On optimise le transfert par pompage d'effluents constitués d'au moins une phase gazeuse et d'au moins une phase liquide dans une conduite de transfert reliant une source d'effluents en interposant sur la conduite entre la source et le lieu de destination une pompe polyphasique, et on régule la vitesse de rotation de la pompe de façon à adapter le débit de celle-ci à au moins un des paramètres suivants ; la variation de débit du puits, la variation du rapport volumétrique GLR ou les variations de perte de charges surgissant dans la conduite lors du transfert. On contrôle les valeurs des paramètres et on ramène, si nécessaire, ces valeurs à des valeurs compatibles avec le fonctionnement de la pompe.</SDOAB >
Patent CA-2088874-C (CA)
Inventor: THURIES EDMOND
IPC: F03B13/06
Filed: 1993-02-05
Granted: 1997-01-28
Abstract: Station de pompage fournissant de l'énergie hydraulique à un réseau (R) ou élevant de l'eau d'un niveau bas à un niveau haut, et comprenant notamment un transformateur (THT/MT) entre un alternateur et le réseau, avec interposition d'un disjoncteur (DTHT), caractérisé en ce qu'il comprend des moyens pour limiter le courant d'appel dans le transformateur. Ces moyens comprennent une résistance (RS) de 500 à 100.000 ohms insérée à la fermeture du disjoncteur pendant une durée comprise entre 15 et 19 millisecondes et/ou des moyens (MY) pour que le disjoncteur ne se ferme sur le transformateur à vide qu'à un instant séparé au maximum de 1,2 millisecondes d'un extrémum de la tension du réseau (R).