baber/WOPTO huggingface dataset:
Patent CA-2131362-C (CA)
Inventor: OGITA SHOUICHI
IPC: H01S5/12
Filed: 1990-07-13
Granted: 1998-11-24
Abstract: A distribution feedback laser diode, comprises a substrate, a waveguide layer provided on the substrate, an active layer provided on the waveguide layer, a diffraction grating provided at an interface between the substrate and the waveguide layer for reflecting an optical radiation formed in the active layer back and forth, a clad layer provided on the active layer for confining the optical radiation within the active layer, a plurality of segmented electrodes provided on the top surface of the clad layer along an elongated direction of the laser diode for injecting the carriers into the active layer, wherein at least one of the segmented electrodes is provided in correspondence to a part of the active layer in which the optical radiation formed in the active layer has a maximum intensity level, and a backside electrode provided at the bottom surface of the substrate for injecting the carriers into the active layer through the substrate.
Patent CA-2135638-C (CA)
Title: Salts of polyaspartic acid by high temperature reaction
Inventor: WOOD LOUIS L
IPC: C08G69/00
Filed: 1993-05-07
Granted: 2003-08-05
Abstract: Polyaspartate, useful for inhibition of incrustations due to materials causing hardness in water and of value in detergent formulations, can be prepared by reacting maleic acid or fumaric acid with ammonia in a molar ratio of 1:1-2.1 at temperatures greater than 170 ° C., followed by conversion of the polymer formed in this reaction to a salt of polyaspartic acid by basic hydro-lysis.
Patent CA-2136514-C (CA)
Title: An ink jet recording head, an ink jet unit and an ink jet apparatus using said recording head
Inventor: KITANI MASASHI
IPC: B41J2/14
Filed: 1994-11-23
Granted: 2000-01-11
Abstract: An ink jet head for performing the recording by discharging the inks comprises an element substrate provided with a plurality of discharge energy generating elements for discharging the inks and a grooved member integrally having a discharge port, a plurality of grooves constituting ink flow passages provided corresponding to the discharge energy generating elements, a plurality of recess portions constituting a plurality of liquid chambers for supplying the inks to a plurality of ink flow passages, and separation grooves provided between the plurality of recess portions to separate between the recess portions constituting the liquid chambers, the element substrate and the groove member being jointed together.      The liquid chambers are separated by the separation grooves for preventing the inks from flowing between the liquid chambers.
Patent CA-2137235-C (CA)
Inventor: COOK MALCOLM R
IPC: B01J23/72
Filed: 1993-06-02
Granted: 2004-10-26
Abstract: A process for the production of a hydro(halo)fluorocarbon which comprises contacting an .alpha.-fluoroether in the vapour phase at an elevated temperature with a catalyst and wherein the catalyst is treated whereby to maintain and/or restore its activity.      The catalyst treatment comprises either: (i) heating the catalyst to an elevated temperature above about 250°C in the absence of an .alpha.-fluoro ether, or (ii) contacting the catalyst at an elevated temperature with an oxidising agent whilst or between the times when the .alpha.-fluoro ether is contacted with the catalyst. The catalyst may be an oxidation promoting metal, for example zinc, iron or copper, carried on a metal oxide, fluoride or oxyfluoride support.
Patent CA-2138160-C (CA)
Inventor: VAN DER WAL HANNO RUDOLF
IPC: C08G18/48
Filed: 1993-06-14
Granted: 2005-03-15
Abstract: A process for the recovery of scrap polyurethane polymer in the form of a polyol, and the use of said polyol to prepare a fresh polyurethane polymer is disclosed. Said process involves thermally treating scrap polyurethane at an elevated temperature with a liquid mixture which consists of an alkanolamine and a metal hydroxide and subsequently reacting the resulting intermediate product with an alkylene oxide to obtain polyol. The recovery process is characterized in that the weight ratio of scrap polyurethane to liquid mixture is from at least 12:1, and the liquid mixture contains the alkanolamine in from 70 to 95 weight percent.
Patent CA-2139152-C (CA)
Title: Water cooled welding torch
Inventor: ZAMUNER FRANK
IPC: B23K9/28
Filed: 1994-12-28
Granted: 2005-09-20
Abstract: The supply of water to the water jackets in the torch is fed through feed and return hoses, clamped to pipe spigots. The spigots are a self-locking-taper fit in a block, and are drawn into the block with a drawring, using bolts. This spigot-to-block connection is highly robust, has good electrical conductivity, and is well-sealed against water leakage. The electrical supply to the arc is fed through two cables, which lie inside the feed and return water hoses.
Patent CA-2139562-C (CA)
Title: Producing spectral patterns of heart sounds
Inventor: REEVES WILLIAM
IPC: A61B5/352
Filed: 1993-05-17
Granted: 2001-05-01
Abstract: The present invention relates to a system (10) and a process for detecting, assessing, grading and diagnosing heart conditions in human beings. The system includes device(s) (22, 26, 34) for providing or generating an acoustic blood flow signal and a signal representative of the electrical activity of a subject's heart, a conditioning circuit (16) for processing the electrical activity (ECG) signal to provide a timing or calibration signal having QRS spikes at the onset of each systolic portion of a heart cycle, and a conditioning circuit (14) for the acoustic blood flow (MCG) signal to filter out unwanted noise and to amplify low frequency sounds. The calibration signal and the MCG signal thus conditioned are fed into a microprocessor (18) wherein the MCG signal is convened in a spectral pattern of heart sounds and matched with the timing signal. The output from the microprocessor is a combined, real time MCG pattern/ECG wave signal.
Patent CA-2152180-C (CA)
Inventor: KOSIEC JEANNIE HAN
IPC: H03L3/00
Filed: 1994-10-14
Granted: 1999-08-10
Abstract: An improved phase synchronization circuit (301) and method therefor for a phase locked loop (300). Each of a divided reference frequency signal (206) and a feedback signal (209) is held in a predetermined state. The divided reference frequency signal (206) is enabled responsive to the phase of a reference frequency signal (115). A phase relationship between the reference frequency signal (115) and an output frequency signal (116 or 117) is determined. The feedback signal (209) is enabled responsive to enabling the divided reference frequency signal (206) and the determined phase relationship. The present invention advantageously provides a rapid and accurate phase synchronization for the PLL (300) with minimum additional hardware and without introducing phase error into the PLL (300).
Patent CA-2159259-C (CA)
Inventor: BAZINET ROBERT
IPC: G01V3/30
Filed: 1995-09-27
Granted: 2001-04-10
Abstract: The    multifrequency    electromagnetic surveying method and system generate a cyclic waveform consisting of a repeating sequence of sinusoidal half-cycles and/or cycles of various frequencies.   The cyclic  waveform  is  applied  to  the  coil  of  a transmitter  to  produce  an  electromagnetic  field propagated through an area under investigation.   A receiver   comprises   a   coil   to   receive   the electromagnetic field having propagated through the area under investigation, and an analysing circuit to extract, for each frequency of the waveform cycles, parameters   of   interest   from   the   received electromagnetic field.   The parameters of interest include in-phase and in-quadrature components of the amplitude of the electromagnetic field at each cycle frequency.
Patent CA-2160340-C (CA)
Title: Four quadrant current mode switching amplifier
Inventor: CAINE STEVEN LANCE
IPC: H03F3/217
Filed: 1993-06-02
Granted: 1998-12-15
Abstract: A four quadrant current mode switching amplifier is provided. The switching amplifier includes a pulse width modulator (PWM) (16) programmed by an error voltage derived from an analog input voltage and the amplified output voltage. The PWM is also provided with negative current mode feedback in all four quadrants of operation. A logic device (18) controls the switching topology (20) to source, or sink power for the load and to provide negative or positive output in dependence upon sign and slope bits, derived from the input and output voltages, and the PWM output.
Patent CA-2163049-C (CA)
Inventor: AHTILA PEKKA
IPC: D21C11/12
Filed: 1995-11-16
Granted: 2006-01-03
Abstract: The invention relates to a method for controlling combustion air in a boiler plant, wherein combustion air is supplied into a boiler located in a boiler building. Combustion air is taken both from the inside and the outside of the building in a suitable ratio, wherein the air flow (q1) taken from outside is used to supply part of the combustion air required by the boiler. The ratio (q1/q2) is determined at least on the basis of the temperature of the outside air and the load of the boiler. The invention relates also to an apparatus for controlling combustion air in a boiler plant. The apparatus comprises a combustion air duct (C) for conveying combustion air into a boiler located in a boiler building. Combustion air duct (C) is provided with a mixing section (1) connected to both the inside of the building for supplying inside air into the boiler and the outside of the building for supplying outside air into the boiler. The mixing part (1) is further provided with control devices (2, 3) for mixing the air flow taken from the inside (q2) and the air flow taken from the outside (q1) to a total air flow (q1+2) entering the combustion air duct in a desired ratio. The apparatus comprises means for measuring the temperature (t mix) of the air flow (q1+2) which are connected to a comparator unit arranged to control the control devices (2, 3) of the mixing section (1) for adjusting the ratio of said flows (q2, q1).
Patent CA-2165815-C (CA)
Title: Digital radio communication device
Inventor: TATSUMI KAORU
IPC: H04L1/06
Filed: 1994-06-21
Granted: 1999-06-01
Abstract: Digital radio communication equipment which can prevent the worsening of the error rate of demodulated signals due to the equalization of the output from a digital demodulator (6) and can always receive radio waves in the optimum state regardless of the existence of delayed waves. A bit error rate estimation circuit (8) estimates a bit error based on demodulated serial data (S3) outputted from the circuit (6) and outputs the estimated results to a control circuit (20) as an estimated bit error signal (S5). The circuit (20) selects either the demodulated serial data (S3) outputted from the circuit (6) or the demodulated serial data (S4) from an equalizer (7) by switching a selector (9) in accordance with a selector control signal (S6) based on the signal (S6) from the circuit (8) and an electric field intensity indicating signal (S2) from a reception circuit (3), and then outputs the selected data as demodulated data (S7).
Patent CA-2174709-C (CA)
Inventor: TAKAHASHI SHINJI
IPC: G01R31/06
Filed: 1996-04-22
Granted: 1999-07-13
Abstract: An  electric  rotating  machine  comprises  a  rotor body of cylindrical structure and a stator body covering an outer peripheral portion of the rotor body in a non-contact fashion.  The stator body includes  a stator winding formed with an insulation layer and arranged radially outward of the rotor body with a clearance from the rotor body and a stator   core  which  supports the   stator  winding.   The electrostatic capacity of the stator winding is measured by an   electrostatic   capacity   measuring   instrument   which comprises a housing having a size allowing the housing to be accommodated in the clearance between the rotor body and the  stator winding,  a  support  body detachably  secured  to the  rotor body and adapted to  support  the housing within the  clearance  to  be  movable,  and  a  measuring  element mounted to the housing on the side of the housing facing the  stator  winding  and  adapted  to  measure electrostatic capacity of the stator winding,  wherein a degree of water penetration  into  the  insulation of  the  stator winding  is determined based on a measurement data  from the measuring element.
Patent CA-2174764-C (CA)
Inventor: GURNEY DAVID PAUL
IPC: H04B7/08
Filed: 1995-06-30
Granted: 2000-08-01
Abstract: The present invention provides for economical predictive symbol timing estimation in a digital receiver by reducing gate count and current drain. The invention also reduces the processing delay. The predictive symbol timing estimation method (300) and device (200) are applicable to any digital radio system which transmits on a continuous or semi-continuous basis.
Patent CA-2177163-C (CA)
Inventor: WARWICK ALASTAIR ANTHONY
IPC: H04N7/16
Filed: 1994-12-07
Granted: 1999-07-27
Abstract: A cable television distribution arrangement is supplied via optical fibers with additional digital signals which are delivered to customers via coaxial drop cables (20) modulated at frequencies above those of the conventional analog television channels. A reduction in the required number of modulators is achieved, while delivering individually selected signals to individual customers, by supplying digital signals for a group of customers to a first modulator (72) and a pseudo data signal to a second modulator (84), and selecting (78) between the outputs of the two modulators individually for each customer in the group. Switching between the outputs of the modulators is carried out during overhead information (O/H) which is additionally supplied commonly to both modulators.
Patent CA-2178174-C (CA)
Title: Process and intermediates for the manufacture of herbicidal 1-{[2-(cyclopropylcarbonyl)phenyl]sulfamoyl}-3-(4,6-dialkoxy-2-pyrimidinyl)urea compounds
Inventor: DRABB THOMAS WALTER JR
IPC: C07D521/00
Filed: 1996-06-04
Granted: 2008-07-29
Abstract: There is provided an effective and efficient, three step process for the manufacture of crop-selective, herbicidal 1-{[2-(cyclopropylcarbonyl)- phenyl]sulfamoyl}-3-(4,6-dialkoxy-2-pyrimidinyl)urea compounds, and an intermediate for use therein.
Patent CA-2178221-C (CA)
Inventor: NIKAI ISAO
IPC: F28D9/00
Filed: 1995-10-04
Granted: 2002-05-28
Abstract: A mobile cold air supply unit which comprises, as housed in a single casing, an air compressor-expander constituted of an integral combination of a motor, an air compressor and an air expander, an air-to-water heat exchanger and an air-to-air heat exchanger, is furnished in the casing with air tubing for interconnecting the aforesaid components at an air pressure not higher than 5 kg/cm2, and is provided with a cold air discharge connection, a return air intake connection, a cooling water outlet connection and a cooling water intake connection.
Patent CA-2186050-C (CA)
Inventor: OOHASHI TSUTOMU
IPC: A61M21/00
Filed: 1996-09-20
Granted: 2001-04-03
Abstract: The present invention relates to a sound generating apparatus, a sound generating space, a sound, and a method for generating a sound.  A sound is generated which has a frequency within a first frequency range beyond a predetermined audible frequency range and up to a predetermined maximum frequency.  The sound is non-stationary so as to change in a micro-temporal area in a second frequency range beyond 10 kHz.  The generated sound is then applied to a person, thereby increasing cerebral blood flow of the person, which causes an improvement and an enhancement of the person's state of mind and body, so as to relieve stresses, thereby relaxing the person.
Patent CA-2193211-C (CA)
Title: Apparatus for coupling multiple data sources onto a printed document
Inventor: BRADLEY WILLIAM C
IPC: B42D15/10
Filed: 1995-06-19
Granted: 1999-01-05
Abstract: A system (10) for providing a printed output image including information from a data collection system onto a single print medium is disclosed. Data collection systems and methods are disclosed for collecting data from a plurality of spatially separated sources and for providing that data as a sequence of output signals. The data collection system includes a housing (42), a selection element (50), one or more image paths (48, 49) and an image plane (46). The selection element (50) selectively and alternatively couples visual images from separate object sources along the image paths and onto the image plane (46). The selection element (50) may include optical shutters for selectively occluding or transmitting the visual images and may include illumination elements for providing a controlled sequence of illumination at selected ones of the object sources. The system (10) can assemble the printed data in a format suitable for printing as an identification card.
Patent CA-2194131-C (CA)
Inventor: BROILLET MICHEL
IPC: B02C19/00
Filed: 1996-12-30
Granted: 2003-06-10
Abstract: The  height positioning of the rotor (4) and thus the  play  between  the wings (3) of the rotor and the sieve (5) of the machine are adjustable by means of an adjusting  system  (20 - 26), even during operation of the  machine.    The  drive of the rotor (4) by a belt (19)  allows  to omit gears as well as an oil bath for the  drive.  The risk of a contamination of the granu-lated  material  by  residues  is  thus obviated.  The sieve  (5)  is supported on a retaining ring (6) which allows  to  adjust  the  height of the sieve in such a manner  that  the internal surface of the sieve is al-ways  at the same position independently of the thick-ness  of the sieve.  It is thus possible to adjust the play between the sieve and the rotor with precision.
Patent CA-2194749-C (CA)
Title: Building emergency simulator
Inventor: GUERTIN THOMAS GEORGE
IPC: G09B9/00
Filed: 1997-01-09
Granted: 2002-01-08
Abstract: There is provided a building emergency simulator which can graphically and operationally reproduce various building fire alarm/voice communication/smoke control and other systems and provide means for training personnel to successfully operate  systems  and  manage  emergency  situations.    The emergency simulator includes a computer, screen and projection unit for viewing images received from the computer, software for creating an image of various building emergency systems and programmable for creating a simulation of a response of the  building  emergency  systems  to  a  desired  emergency situation, microphone and handset and a trackball pointing device for interacting with the software program.
Patent CA-2197376-C (CA)
Title: Switching device for controlling thyristors
Inventor: KOYAMA KENICHI
IPC: H03K17/00
Filed: 1997-02-12
Granted: 2000-11-14
Abstract: A switching device has a control section to transfer a gate control signal indicating thyristors from ON state to OFF state after a parallel switch is open and an opening degree of the parallel switch is satisfied where no arc discharge is generated at a contact point in the parallel switch.
Patent CA-2201243-C (CA)
Title: Electron-beam generating apparatus, image display apparatus having the same, and method of driving thereof
Inventor: SAKURAGI TAKAMASA
IPC: G09G3/20
Filed: 1997-03-27
Granted: 2002-09-10
Abstract: A driving circuit and a driving method capable of uniformly outputting electron beam at high speed from a multi-electron-beam source (50) having a plurality of cold cathode devices wired in a matrix, to provide a display apparatus having a characteristic of less unevenness in display luminance, a superior linearity in grayscale, and fast response.  The electron-beam generating apparatus includes a multi-electron-beam source (50) where a plurality of cold cathode devices are wired with row wiring and column wiring arranged in a matrix form, a scanning circuit (2) connected to the row wiring, and modulation circuits (10, 20, 30) connected to the column wiring.  The modulation circuits (10, 20, 30) includes: a controlled current source (10) for supplying a driving current pulse to the cold cathode devices, a voltage source (20) for quickly charging parasitic capacity of the multi-electron-beam source (50), and a charging-voltage apply circuit (30) for electrically connecting the voltage source and the column wiring in synchronization with a rise of the driving current pulse.
Patent CA-2203360-C (CA)
Inventor: BOUNDS WILLIAM E
IPC: A47J42/04
Filed: 1997-04-22
Granted: 2007-10-30
Abstract: A condiment mill has a catcher device installed on the bottom thereof opposite the grinder to catch and prevent the dropping of condiment grindings left over after the mill has been used. The catcher device is in the form of a receptacle and cover which is pivotally mounted on the mill. This cover is resiliently urged towards a closed position by a leaf spring and can be manually placed in retention in the closed position. The cover is manually brought to and retained in an open position for normal dispensing of the condiment,
Patent CA-2206104-C (CA)
Title: Adamantyl substituted oxindoles as pharmaceuticals agents
Inventor: LYSSIKATOS JOSEPH PETER
IPC: A61P43/00
Filed: 1997-05-26
Granted: 2000-05-30
Abstract: This invention relates to a novel compound of the formula                        IA     or                     IB     or pharmaceutically acceptable salts thereof, wherein preferred values are as follows:  R1 is hydrogen, R2 is pyridin-4-ylmethyl, R3 is 4-pyridyl, R4 is 1- or 2-adamantyl, E1  and E2  are selected, independently, from hydrogen, halo, (C1-C3)alkyl, hydroxy, (C1-C3)alkoxy, nitro, trifluoromethyl, cyano, amino, (C1-C3)alkylamino and di[(C1-C3)alkyl]amino, and Het' and Het" are selected, independently, from 6 membered heterocyclic rings containing from one to four nitrogen atoms as part of the ring.          The invention also relates to a pharmaceutical composition for treating cancer, which composition comprises a compound as described above, or a pharmaceutically acceptable salt thereof, together with a pharmaceutically acceptable carrier.
Patent CA-2209381-C (CA)
Title: Process and plant for processing mixed plastics
Inventor: FAHRBACH GERHARD
IPC: B29B17/04
Filed: 1995-12-21
Granted: 2001-05-01
Abstract: The invention relates to a process and apparatus for reprocessing mixed plastics, more particularly mixed plastics from household refuse. With the process according to the invention the material being reprocessed is shredded in a shredding stage, agglomerated in an agglomerator wherein volatile substances are sucked off by suction devices, and the agglomerated material is dried over a drying path. In order to reduce obstructive substances, such as paper and ash, the fine grain portion in particular of the plastics agglomerated is screened off. With the drying process according to the invention it is possible to produce without wet processing steps which are high in energy consumption a plastics agglomerate of high quality which is suitable for industrial re-use.
Patent CA-2213834-C (CA)
Title: Laundry composition containing dye fixatives and cellulase
Inventor: HUBESCH BRUNO ALBERT JEAN
IPC: C11D3/00
Filed: 1996-03-04
Granted: 2000-12-26
Abstract: Laundry compositions, specifically fabric-conditioning compositions, for use in the rinse cycle of laundry washing processes, and which improve colour-depth maintenance over single or multiple washing cycles. In order to achieve this improvement, the laundry compositions contain a cellulase enzyme at a level ranging from 0.05 CEVU/gram to 125 CEVU/gram of finished product and a cationic dye-fixing agent within the range of 0.01 to 50 % by weight of finished product.