baber/WOPTO huggingface dataset:
Patent CA-1275447-C (CA)
Title: Fm communication system with improved response to rayleigh-faded received signals
Inventor: EASTMOND BRUCE C
IPC: H04B1/10
Filed: 1987-11-02
Granted: 1990-10-23
Abstract: ABSTRACT OF THE DISCLOSURE         An improved FM communication system is disclosed in which noise bursts and pops in the audio output of the receiver, due to weak and Rayleigh-faded signals, are minimized by selectively attenuating the audio signal in the receiver.  The amount and rate of attenuation for the receiver noise reduction circuits is determined by a control signal derived from either the average discriminator noise at frequencies above 3 kHz, or from a received RF signal strength indicator, or a combination of both. The audio output is attenuated during weak signals or Rayleigh fades only when the attenuation control signal increases above a predetermined signal-to-noise ratio threshold.  Also described are further improvements to noise attenuation devices used in combination with the receiver noise reduction circuits to enhance audio quality in particular applications, e.g., FM repeater systems which may incorporate multiple transmitters in a simulcast configuration, and FM communications systems using companding.
Patent CA-1278524-C (CA)
Title: Stamp formed muffler with multiple low frequency resonating chambers
Inventor: HARWOOD JON W
IPC: F01N1/08
Filed: 1987-12-15
Granted: 1991-01-02
Abstract: ABSTRACT OF THE DISCLOSURE           A muffler is provided with a pair of internal plates stamp  formed  to define  an  array  of  tubes  therebetween.   An external  shell,  which  may  be  stamp  formed,  surrounds  and encloses  at  least  selected  portions  of the  internal plates.  The array of tubes stamp formed in the internal plates includes at  least  two  tuning  tubes.   One  tuning  tube  terminates  at a  tuning  aperture  in one  of the two  internal plates,  while the other tuning tube terminates at an aperture stamp formed in  the  other of the  two  internal plates.   Thus,  one tuning tube will communicate with a low frequency resonating chamber on one side of the pair of internal plates, while the other tuning tube will communicate with a low frequency resonating chamber on the opposite side of the assembled internal plates.
Patent CA-1300695-C (CA)
Title: Method for welding ribbed pipe
Inventor: DAVIS PAUL K
IPC: B23K31/02
Filed: 1987-12-21
Granted: 1992-05-12
Abstract: METHOD FOR WELDING RIBBED PIPE            Abstract of the Disclosure A method is described for manufacturing helically formed pipe from strip material.  One side of the strip material is formed to provide a first side flange that projects substantially 90° relative to the plane of the strip.  The opposite side of the strip is formed with a channel that includes a second side flange that also projects substantially 90° relative to the plane of the strip but in the opposite direction from the first side flange.  The strip material is then helically coiled while the first and second side flanges are moved into abutting contact.  Pressure is then applied radially of the pipe axis, forcing the contacting edges of the flanges together while the flanges are welded, thus forming a rib with a helical weld seam located at or near the line of neutral forces in the rib.
Patent CA-1281951-C (CA)
Title: Combined carpet yarns by open end rotor spinning
Inventor: YNGVE PAUL W
IPC: D01H4/08
Filed: 1988-01-19
Granted: 1991-03-26
Abstract: ABSTRACT A method for manufacturing a combined yarn, by open end rotor spinning, suitable for use in carpets is disclosed.
Patent CA-1320966-C (CA)
Title: Process for the preparation of reaction products of 2, 2-bis,-(4-hydroxphenyl)-hexafluoropropane and new derivatives of this type
Inventor: SCHNEIDER KLAUS-ALBERT
IPC: C07C309/63
Filed: 1988-02-09
Granted: 1993-08-03
Abstract: Abstract A novel process is provided for synthesizing tetrasubstituted 2,2-bis(phenyl)hexafluoropropanes.  Starting from hexafluorobisphenol A the first step can be either nitration to the 3,3'-dinitro compound, followed by introducing the 4,4'-hydroxyl groups substituted with suitable leaving groups, or vice versa.  The intermediates thus obtained are suitable substrates for displacement of the derivatized hydroxyl groups by a variety of nucleophiles, leading to novel tetra substituted 2,2-bis-(phenyl)hexafluoropropanes, having nitro or amino groups in the 3-and 3'-position, and primary or secondary amine or mercaptan radicals in the 4-and 4'-position.  These partly fluorinated aromatic compounds are valuable monomers for preparing polymers like polybenzimidazoles or polybenzothiazoles.
Patent CA-1315165-C (CA)
Title: Medical device
Inventor: SITAR DENNIS L
IPC: A61M5/00
Filed: 1988-03-31
Granted: 1993-03-30
Abstract: ABSTRACT OF THE DISCLOSURE         Disclosed is an improved medical device of the type where a needle is protected by a guard member moved axially along the needle shaft to a permanently locked position. The improvement is the use of an elongated stem member extending from the locking element covering a substantial portion of the exterior surface of the needle shaft to provide an essentially fail-safe bond between the locking element and the needle and to facilitate manufacture of the device.
Patent CA-1310119-C (CA)
Title: Apparatus for recording a color television signal on a disk recording medium
Inventor: OWA HIDEO
IPC: G11B7/00
Filed: 1988-04-08
Granted: 1992-11-10
Abstract: ABSTRACT OF THE DISCLOSURE         In an apparatus and method for optically recording on an optical disk a TV signal comprised of a color image signal and an audio signal; one horizontal period portion of an original luminance signal and one horizontal period portion of two original color difference signals from a standard TV signal are time-base-compressed to generate a time-base-compressed video signal for one horizontal period, the audio signal is digitized and time-base-compressed, and then the time-base-compressed digital audio signal and the time-base-compressed video signal are time-division-multiplexed with each other and recorded on the optical disk.                   BACKGROUND OF THE INVENTION          Field of the Invention The present invention relates generally to an apparatus and a method for optically recording color image and audio signals, and more particularly is directed to an apparatus and method of this kind which are applicable to a so-called optical Write-Once system.         Description of the Prior Art It has been proposed to record a color image signal and an audio signal on an optical disk with the frequency spectra shown in Figs. 1A and 1B, respectively.
Patent CA-1304545-C (CA)
Title: Pavement-cleaning vehicle
Inventor: BOSCHUNG MARCEL
IPC: E01H1/08
Filed: 1988-04-18
Granted: 1992-07-07
Abstract: ABSTRACT     A chassis frame is supported on a front steering axle and a rear steering axle.  Between the two axles and beneath the chassis frame, a hollow support serving as a main blow duct is pivotingly disposed.  Rais-ably and lowerably connected to the support via levers is a sweeping-brush roller.  Connected to the support are blowing nozzles which lead air supplied by a fan mounted on the chassis frame into a blow duct formed by a cover plate disposed in front of the sweeping-brush roller. Disposed within the blow duct are two suction ports which are connected via dirt-suction pipes to a vacuum-sweepings container disposed on the chassis frame.  The outlet of the vacuum-sweepings container is connected at a dismantling point to an air-suction duct which is in turn connected to the intake of the fan.  This cleaning vehicle can be used for snow clearance by opening a flap and closing another flap in an air-outlet pipe piece and by moving an operating lever from a middle position into either of two end positions.
Patent CA-1304775-C (CA)
Title: Method and apparatus for the digital determination of the field angle of a rotating-field machine
Inventor: RENG LEONHARD
IPC: H02P21/10
Filed: 1988-05-10
Granted: 1992-07-07
Abstract: ABSTRACT OF THE DISCLOSURE         An angle is calculated with high time resolution for the field angle of a rotating-field machine in order to control the rotating-field machine.  Due to the inertia of the system, the speed of rotation of the field vector changes slowly.  A microprocessor reads the measured values of current and voltage only at a slow rate (tµ).  The values are processed into the components of an EMF vector which is converted as to magnitude (?) and a discontinuously changing value (.omega.) for the frequency of a flux vector or the EMF vector.  A hardware integrator (INT1) is coupled to the microcomputer and furnishes a quasi-continuously changing signal (?) for the field angle at a high computing rate under the control of the discontinuously changing value (.omega.) of the flux vector.
Patent CA-1331688-C (CA)
Inventor: KIMURA ETSUJI
IPC: C01F17/212
Filed: 1988-05-26
Granted: 1994-08-30
Abstract: Abstract of the Disclosure Hexagonal-bipyramid crystalline scandium oxide powder and a process for preparing the same are disclosed.  The process comprises forming scandium oxalate from an acid aqueous solution containing scandium in the presence of chloride ions and ammonium ions, collecting the precipitate and heating the collected precipitate. Hexagonal-bipyramid crystalline scandium oxide is useful for making electron gun for cathode ray tubes.
Patent CA-1331101-C (CA)
Inventor: KUNZE DIETER
IPC: H02G1/06
Filed: 1988-06-30
Granted: 1994-08-02
Abstract: ABSTRACT                        CABLE PLOUGH      The invention concerns a cable plough (1) in which the plough element (3) is mounted to pivot around a pivot point (7) situated at the free end of a pivot arm (6) mounted to the plough chassis (2).  Restoring means (19, 20) acting between the pivot arm (6) and the plough element (3) tend to rotate the plough element (3) back to its ploughing position when it is displaced therefrom.   Figure 1.
Patent CA-1313650-C (CA)
Title: High functional regenerated cellulose composition
Inventor: HIRAOKA KEIJUN
IPC: C08K3/04
Filed: 1988-07-07
Granted: 1993-02-16
Abstract: Abstract A regenerated cellulose composition having excellent adsorptivity and flame resistance prepared by a process in which a solvent-adsorbing active carbon in the form of an aqueous dispersion and a specific phosphorus flame retarder, extruded into a coagulation bath to regenerate cellulose and dried at a temperature of not lower than the boiling point of the solvent, whereby the adsorptivity of active carbon is maintained at a high level while a flame resistance is imparted to cellulose.
Patent CA-1317552-C (CA)
Inventor: RICHTER JOHAN C F C
IPC: B01D33/00
Filed: 1988-08-10
Granted: 1993-05-11
Abstract: ABSTRACT     The screens of a pulp treating vessel, such as a paper pulp thickener, or diffuser, are back flushed in a simple yet effective manner.  The screens are mounted to a supporting conduit within a vertical vessel, and a cylinder is connected at one open end to the conduit, and the other open end is disposed within the pulp inside the vessel.  A piston is mounted within the cylinder and relative movement between the piston and cylinder is effected periodically in order to force liquid from within the cylinder into the conduit and out the screens, backflushing the screens and preventing clogging.          Since no additional volume of liquid is added to the vessel during backflushing, no surge occurs in the vessel.  Conventional accumulators, on/off valves, and the like can be eliminated while -- in the case of diffusion washing -- efficiency can be increased as much as 20-30%, and capacity increased as much as about 15%.
Patent CA-1317424-C (CA)
Inventor: KINZER KEVIN E
IPC: C08J9/00
Filed: 1988-09-01
Granted: 1993-05-11
Abstract: Abstract ORIENTED MICROPOROUS FILM A microporous article is provided.  The article comprises a thermoplastic polymeric structure having a plurality of cells with adjacent cells being inter-connected by passageways to provide a network of communicating pores.  The structure is oriented in at least one direction.
Patent CA-1310350-C (CA)
Inventor: CARN PATRICK
IPC: B62B15/00
Filed: 1988-12-05
Granted: 1992-11-17
Abstract: Bicycle constitué d'un plateau (1) recevant un passager, monté au moins sur deux roues (7). Selon l'invention, les roues (7) sont reliées au plateau (1) par des bras (3) pivotant horizontalement autour des axes de pivots (2) du plateau et (4) des roues, l'écartement des axes (4) étant inférieur à celui des axes (2).
Patent CA-1323313-C (CA)
Title: Backwash system for filter thickeners
Inventor: ROBINSKY ELI I
IPC: B01D29/37
Filed: 1988-12-19
Granted: 1993-10-19
Abstract: ABSTRACT          A method and apparatus for backwashing filter elements in a filter vessel.  At least one collapsible bladder in the form of a tube is suspended together with a plurality of filter elements in a mixture compartment of a vessel for filtering solids from a liquid-solids mixture, the tube having a volumetric displacement at least as great as the volume of filtrate required to flow from a filtrate compartment into the filter elements to slightly expand filter fabric enveloping the filter elements to disengage filtrate deposited thereon.          Means are provided to fill the tube with fluid for expansion thereof and to rapidly empty fluid from the  tube for sudden collapse of the tube and attendant rapid reverse flow of filtrate from the filtrate compartment.
Patent CA-1309197-C (CA)
Title: Filter switching arrangement for a tuner
Inventor: ANDERSON WILLIAM D
IPC: H03J5/24
Filed: 1989-02-02
Granted: 1992-10-20
Abstract: Abstract In a tunable filter including first and second inductors, a varactor diode, and a bandswitching diode connected intermediate the inductors to select the inductor configuration for first and second tuning bands, a capacitor is connected in parallel wilth the bandswitching diode.  When the bandswitching diode is in the high impedance "non-conducting" state, the capacitor is functionally connected with other elements of the tunable filter for purposes such as trapping or tracking.  When the bandswitching diode is in the low impedance "non-conducting" state, the capacitor is functionally disconnected from the tunable circuit.
Patent CA-1313647-C (CA)
Title: Product dispenser with shiftable closure blade
Inventor: FOSTER DONALD D
IPC: B65D47/34
Filed: 1989-02-24
Granted: 1993-02-16
Abstract: PRODUCT DISPENSER WITH SHIFTABLE CLOSURE BLADE          Abstract of the Invention A relatively small product dispenser for cosmetics such as creams and lotions and adapted to be carried in a handbag or purse has a locking ring which is  rotatable  to  a  first  orientation  that prevents depression of an actuator and which is also rotatable a second orientation enabling actuator movement.  The locking ring is coupled to a closure element in such a fashion that the element covers a discharge opening of the dispenser when the actuator is locked in position in order to retard the drying and consequent hardening of any products remaining within a passageway adjacent the discharge opening. As the locking ring is turned to its second orienta-tion enabling the actuator to be depressed,  the closure element moves away from the discharge open-ing to permit full flow of products therethrough.          (Docket No. 19803)
Patent CA-1310825-C (CA)
Title: Portable concrete hammer
Inventor: ELLINGTON DAVID A
IPC: F02B1/04
Filed: 1989-03-13
Granted: 1992-12-01
Abstract: Abstract of the Disclosure A portable concrete hammer including a wheeled car-riage, a mast movable between a vertical operating position and a horizontal transport position, and an automatic ratchet drive that advances the concrete hammer over a concrete surface during the portion of the operating cycle when the weight is being raised.
Patent CA-1332100-C (CA)
Title: Surface treatment agent for polymer fibers
Inventor: SELTMANN HANS-GUNTER
IPC: D06M15/233
Filed: 1989-05-05
Granted: 1994-09-27
Abstract: TITLE Surface Treatment Agent for Polymer Fibers ABSTRACT The present invention involves an aqueous surface treatment agent for polymer fibers on the basis of a resin preparation, characterized in that it contains 1 - 30 percent by weight of a polar phenoplast of the resol type 2 - 40 percent by weight of a copolymer, crosslinkable with resols, of a radical polymerizable, aromatic hydroxymethyl and/or methyl halogen compound and water to make 100 percent by weight, wherein, if desired, up to 5 percent by weight in further adhesion improvers can be present.       The invention also involves the use of the surface treatment agent for the modification of organic or inorganic polymer fibers, preferably polyamide or polyimide fibers, particularly aromatic polyimide fibers, and a process  or the modification of polymer fibers.
Patent CA-1319124-C (CA)
Title: Liquid inventory control in an ebullated bed process
Inventor: STRICKLAND JOHN C
IPC: C10G49/12
Filed: 1989-05-18
Granted: 1993-06-15
Abstract: LIQUID INVENTORY CONTROL IN AN EBULLATED BED PROCESS       (D#78,872-F) ABSTRACT OF THE DISCLOSURE         The invention is an improvement in an ebullated bed process.  Gas is removed the ebullated bed reactor preferentially to liquid.  Gas is removed by material balance control until the reactor, including the recycle conduit is liquid full.  Foam, generated around the recycle cup and riser conduits is floated upward by liquid and does not enter the recycle conduit.  When steady state is achieved, liquid and gas are both removed from the reactor under material balance control.            RAM ec:EX7K/09
Patent CA-1314736-C (CA)
Inventor: LAFFORGUE JEAN-JACQUES
IPC: B25D17/08
Filed: 1989-07-27
Granted: 1993-03-23
Abstract: ABSTRACT          Drill bit having a shank with grooves The object of the invention is to provide a drill bit which firstly comprises two locking grooves (1,1') diametrically opposed,  and  secondly,  also  diametrically  opposed,  a driving groove (3) and a driving groove (4) associated with a  locking  groove   (2).   The  driving  groove   (4)   is advantageously  angularly  offset  with  respect  to  the associated locking groove (2) so as to have, in the drill bit driving zone, the lateral faces of the two associated grooves be almost merged.          (Fig. 2)
Patent CA-1306672-C (CA)
Title: Microbicidal compositions
Inventor: NEVILL DAVID J
IPC: A01N43/653
Filed: 1989-08-02
Granted: 1992-08-25
Abstract: 5-17161/=            Microbicidal compositions Abstract The combination of the plant microbicide 3-cyano-4-(2,3-dichlorophenyl)-pyrrole ("fenpiclonil") with the plant microbicide 1-[2-[2-chloro-4-(4-chlorophenoxy)-phenyl]-4-methyl-1,3-dioxolan-2-ylmethyl]-1H-1,2,4-triazole results in a synergistically enhanced activity in the control of plant diseases. Plant microbicidal compositions based on such combi-nations are especially suitable for treating seed.
Patent CA-1336350-C (CA)
Title: Internal mold release agent for use in reaction  injection molding
Inventor: DEWHURST JOHN E
IPC: B29C33/60
Filed: 1989-08-18
Granted: 1995-07-25
Abstract: The present invention is directed to a mold release, a composition containing the mold release, and a process of using the mold release.  The mold release comprises an internal mold release composition comprising (a)  a zinc carboxylate containing from 8 to 24 carbon atoms per carboxylate group, and (b)  a compatibilizer comprising an amidine group-containing compound of the formula   wherein R1, R2 and R3 are straight or branched, saturated or unsaturated hydrocarbon chains having up to 30 carbon atoms which may be substituted by ether groups, ester groups, amide groups or amidine groups and may also be terminated by isocyanate-reactive groups such as hydroxyl or amino groups, R4 corresponds to the definition of R1, R2 and R3, but may additionally represent an aromatic substituent having 6 to 15 carbon atoms or may represent the group -NR2R3, with the proviso that when R4 represents the group -NR2R3, R1 can be hydrogen, and wherein R1, R2, R3 and R4 may, with one or both of the amidine nitrogens, form a heterocyclic ring, in an amount sufficient to solubilize the zinc carboxylate.
Patent CA-1327265-C (CA)
Title: Superconducting metal oxide compositions
Inventor: SLEIGHT ARTHUR W
IPC: C04B35/45
Filed: 1989-08-23
Granted: 1994-03-01
Abstract: TITLE          SUPERCONDUCTING METAL OXIDE COMPOSITIONS              ABSTRACT       Compositions having the nominal formula Bi2Sr3-xYxCu2O?+y wherein x is from about 0.05 to about 0.45 and y is from about 0 to about 1 are superconducting.
Patent CA-1328510-C (CA)
Inventor: MCGLYNN PAUL E
IPC: H04M11/00
Filed: 1989-08-23
Granted: 1994-04-12
Abstract: FEATURE NEGOTIATION PROTOCOL AND                 DYNAMICALLY ADJUSTABLE RETRAINING               SEQUENCE FOR A HIGH SPEED HALF DUPLEX                               MODEM                               Abstract A feature negotiation protocol for synchronous operation and a dynamically adjustable retraining sequence.          An originating modem, after completing conventional or standard handshaking sequences, sends a list of desired features to an answering modem. The answering modem either concurs with the desired features, if they are all supported, or sends, back to the originating modem, a list of those features which are supported by the answering modem.          After the end of a negotiation time-out period, both modems begin operation using the features which are common to both modems or by using default (standard) features for operation. If the adjustable duration retraining sequence is selected then each modem will measure the elapsed time since the end of its last transmission and, at the beginning of its next transmission, send a retraining sequence which is dependent upon this elapsed time. Likewise, each modem will measure the amount of elapsed time since the end of its last reception and expect to receive a retraining sequence which is dependent upon this elapsed time. The adjustable duration retraining sequence generally operates to reduce the total retraining sequence and thereby increases the data throughput rate. The result is a modem which has enhanced feature negotiation capabilities and also a higher data throughput rate.
Patent CA-1331764-C (CA)
Title: Window operator
Inventor: BERNER JOHN M
IPC: E05F15/00
Filed: 1989-09-19
Granted: 1994-08-30
Abstract: ABSTRACT OF THE DISCLOSURE    WINDOW OPERATOR         A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output  member through an  intermediate gear structure.   A clutch device  in  the  drive  structure  senses  the  torque applied  to  the  drive  output member  in  a  window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque  applied to  the  output  member  reaches  a predetermined value.  The switch can be adjustably located   relative   to  the   clutch  whereby  the predetermined  value  at  which  the  motor  will  be deenergized  may  be  varied  in  order  to  obtain  a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.