baber/WOPTO huggingface dataset:
Patent CA-2005865-C (CA)
Title: Two-stage method for operating autodeposition bath
Inventor: BROADBENT RONALD W
IPC: B05D7/14
Filed: 1989-12-18
Granted: 2000-09-26
Abstract: An autodeposition bath for coating steel and similar metals is operated initially with a low content of dissolved iron and at a high oxidizing potential. After the iron content has increased beyond a specific level, such as 1.5 g/l, the oxidizing potential is reduced. This permits continued satisfactory operation of the bath with lower rates of iron accumulation in the bath, so that the need for bath stabilization by removing dissolved iron is deferred.
Patent CA-2005903-C (CA)
Title: Black-white liquid crystal display
Inventor: WALDMANN JUERGEN
IPC: G02F1/137
Filed: 1989-12-18
Granted: 1995-12-19
Abstract: A black-white liquid crystal display (10) contains a nematic liquid crystal with a twist of 270° between cell plates.          The product of the liquid crystal layer thickness and anisotropy of the refractive index is about 0.38.  A pretilt of about 15° is present.  The polarization directions (P1, P2) have an angle .beta. of 45° to the orientation directions (Mo, Mu). This display features a very wide viewing angle range with relatively little dependence of the contrast on the viewing angle and there is an almost complete absence of colour shift depending on the viewing angle.  Due to the significant enhancement in veiwing angle range in relation to contrast and colour neutrality compared with all known cells, the display is called "Extended Viewing Angle" display (EVA display).  It has a very high multiplexability.
Patent CA-2007903-C (CA)
Title: Device for detecting keraconjunctivitis sicca
Inventor: DAVIS JEFFREY
IPC: A61B5/05
Filed: 1990-01-17
Granted: 1999-08-17
Abstract: A device for detecting keratoconjunctivitis sicca (KCS) utilizing a probe including a body having an end portion. A plurality of electrical contacts are mounted in spaced configuration at the end portion of the probe body for simultaneous contact with the tear fluid of the ocular conjunctiva, or components thereof. An electrical potential is applied to at least one of the plurality of the electrical contacts and electrical activity, such as conductance, between the one electrical contact and another electrical contact is measured relative to the interposed tear fluid.
Patent CA-2012138-C (CA)
Title: Method and apparatus for continuously producing resin films and installation therefor
Inventor: KAWARATANI HARUO
IPC: B29C41/46
Filed: 1990-03-14
Granted: 1995-08-08
Abstract: For continuous production of a resin film having a plain surface, a resin solution cast in film form over an endless belt is pre-hardened by a gas stream supplied for flow in a direction generally parallel to the surface of the endless belt, and then a jet of gas is blown in the direc-tion of movement of the endless belt whereby the resin is hardened.  In the process for resin film production wherein the resin film is cast over the endless belt and then pre-hardened by a parallel gas stream, the cast film being then hardened by a jet of gas, the installation for production is divided by partitions so as to enable various stages to be operated independently.
Patent CA-2023593-C (CA)
Title: Heat-sensitive recording sheet
Inventor: MINAMI TOSHIAKI
IPC: B41M5/327
Filed: 1990-08-20
Granted: 2001-04-10
Abstract: A heat-sensitive recording sheet of this invention comprises in a heat-sensitive color-developing layer both 4-hydroxy-4'-n-propoxydiphenylsulfone as an organic color-developing agent and a particular fluorane-leuco dye. This sheet provides an intense, clear image, less discoloration, and stable brightness.
Patent CA-2025514-C (CA)
Title: Rapid change die assembly
Inventor: MILLER WILLIAM H
IPC: B29C48/49
Filed: 1990-09-17
Granted: 1994-05-03
Abstract: Abstract An assembly for configuring extrudate flow having a die  assembly  and  an  extruder  switching  assembly  for conveniently changing the profile and extrudate material of the extrusion being manufactured.  The die assembly includes a die head having a feed member passage for movably supporting a feed member in the die head, and first and second die head passages, and corresponding first and second die surfaces which are located intermediate the die surfaces and feed passage.  The feed member includes a feed passage and a feed opening for supplying extrudate to the die head.  Addition-ally, the feed opening has a first central axis, and the first and second die head passages have second and third central axes, respectively.  The first central axis and second central axis are movable with respect to one another upon movement of the feed opening or first die head passage with respect to the other of the feed opening or first die head passage, respec-tively.  The first central axis and third central axis are also movable with respect to one another upon movement of the feed opening or second die head passage with respect to the other of the feed opening or second die head passage, respec-tively.  Movement of the axes correspondingly configures extrudate exiting a die head passage when the feed opening is in communication with the respective die head passage.  The extruder switching assembly includes a housing and an extruder switch member having extrudate supply passages.  The housing supports the extruder switch member for movement between positions in which the die assembly is supplied with extrudate material from either a first or second extruder.
Patent CA-2028578-C (CA)
Title: Fiber optic gyroscope
Inventor: HUANG YUNG-YIEN
IPC: G01C19/72
Filed: 1990-10-25
Granted: 1994-07-26
Abstract: IMPROVED FIBER OPTIC GYROSCOPE               Abstract of the Disclosure An improved fiber optic rotation sensing technique and an improved optical fiber gyro are provided which exhibit increased sensitivity to and linearity of rotation measurement by using a special dual-section, counter-wound fiber coil for measuring the Sagnac phase shift resulting from rotation of the coil.  The optical fiber coil has a plurality of turn and is formed of at least two separate interconnected coil sections each having a predefined number of turns of fiber.  In the gyro arrangement, the separate sections are axially disposed adjacent to each other in such a way that the direction of winding of the turns in one of the coil sections is counter to the direction of winding of the turns in the other of the coil sections.     The plurality of turns in each coil section is selected to be such that the sum of the effective lengths defined thereby is sufficient to realize the desired gyro modulation frequency.  At the same time, the Sagnac phase shift for a given rotation rate is made proportional to the difference between the effective lengths of the coil sections and remains within a desired threshold level even if the overall effective length of the fiber coil is increased.
Patent CA-2029209-C (CA)
Title: Zero-current switching forward power conversion with controllable energy transfer
Inventor: VINCIARELLI PATRIZIO
IPC: H02M1/08
Filed: 1990-11-02
Granted: 1999-07-27
Abstract: An improved forward converter switching at zero-current incorporates a mechanism for selectively regulating the amount of forward energy which is delivered to a load during each converter operating cycle.  Energy is transferred from a voltage source toward a load in discrete packets via a small effective inductance (specifically the small effective leakage inductance of a transformer) and a capacitor, the combination of which define a characteristic time scale for the rise and fall of current such that a switching device connected in series with the voltage source can be cycled on and off at zero-current.  The capacitor is connected to the load via a second inductor.  By incorporating a second bidirectional switch across the capacitor, and cycling the second switch on and off at appropriate times during a converter operating cycle, the amount of forward energy transferred toward the load may be regulated without incurring switching losses in the second bidirectional switching device, and control may also be asserted over reverse current flow from the load toward the second switch subsequent to forward energy transfer.  The new topology allows a single converter to generate a multitude of voltage outputs, all of which may be maintained in regulation as the loads on the various outputs are varied, with no minimum load being required on any output.
Patent CA-2034376-C (CA)
Inventor: HOKANSON PAUL ROBERT
IPC: B60L50/12
Filed: 1991-01-17
Granted: 2000-10-24
Abstract: Method and apparatus for optimizing power delivered by a prime mover-driven electric power alternator to an adjustable speed electric traction motor during high speed operation. The alternator is suitably controlled to deliver constant power if its output voltage does not exceed a first predetermined magnitude corresponding to a "corner point" speed of the motor and to limit the voltage magnitude when motor speed exceeds this corner point, thereby preventing excitation current from exceeding the maximum continuous field current rating of the alternator. As motor speed increases above corner point speed, less power is delivered to the motor, but the power reduction is minimized by increasing the voltage limit above the first predetermined magnitude.      The amount of voltage limit increase, up to a predetermined maximum amount, is proportional to the amount load current in the motor decreases below its magnitude when motor speed equals corner point speed.      Concurrently with this voltage limit increase, the ratio of motor field current magnitude to load current is reduced, thereby weakening the motor field which enables the motor to run at its maximum allowable speed without exceeding the motor commutation limit whenever the predetermined maximum amount of voltage limit increase is obtained.
Patent CA-2037512-C (CA)
Inventor: AGRAWAL RAKESH
IPC: F25J3/04
Filed: 1991-03-04
Granted: 1994-04-19
Abstract: ABSTRACT The present invention is a cryogenic process for the production of nitrogen by distilling air in a double column distillation system comprising a high pressure column and a low pressure column.  The critical step of the invention is the condensation of two nitrogen streams at different pressures in two reboiler/condensers located in the stripping section of the low pressure column to provide column reboil.  The lower pressure of the two nitrogen streams is condensed in the upper of the two reboiler/condensers; the higher pressure nitrogen stream in the lower of the two reboiler/condensers.
Patent CA-2055046-C (CA)
Inventor: JOHNSTON JAMES DAVID
IPC: H04N19/94
Filed: 1991-11-06
Granted: 1997-01-14
Abstract: A quantizer, with quantization control that is sensitive to input signal characteristics and to output buffer fullness responds to an input signal that is divided into blocks and DCT transformed. The transformed signal is analyzed to develop a brightness correction and to evaluate the texture of the image and thechange in texture in the image. Based on these, and in concert with the human visual perception model, perception threshold signals are created for each subband of the transformed signal. Concurrently, scale factors for each subband of the transformed signal are computed, and a measure of variability in the transformed input signal is calculated. A measure of the fullness of the buffer to which the quantizer sends its encoded results is obtained, and that measure is combined with the calculated signal variability to develop a correction signal. The correction signal modifies the perception threshold signals to develop threshold control signals that are applied to the quantizer. The scale factors are also applied to the quantizer, as well as a global target distortion measure.
Patent CA-2060652-C (CA)
Title: N-substituted cycloalkyl and polycycloalkyl alpha-substituted trp-phe- and phenethylamine derivatives
Inventor: HORWELL DAVID C
IPC: C07D403/00
Filed: 1990-06-28
Granted: 2001-08-21
Abstract: Novel unnatural dipeptoids of .alpha.-substituted Trp-Phe derivatives useful as agents in the treatment of obesity, hypersecre-tion of gastric acid in the gut, gastrin-dependent tumors, or as-antipsychotics are disclosed. Further the compounds are antianxie-ty agents and antiulcer agents and are agents useful for preventing the withdrawal response produced by chronic treatment or use followed by chronic treatment followed by withdrawal from nicotine, diazepam, alcohol or cocaine. Also disclosed are pharma-ceutical compositions and methods of treatment using the dipeptoids as well as processes for preparing them and novel interme-diates useful in their preparation. An additional feature of the invention is the use of the subject compounds to prepare pharma-ceutical and diagnostic compositions.
Patent CA-2062621-C (CA)
Title: Protocol adaptation
Inventor: HOYLER RUDOLF
IPC: H04M11/06
Filed: 1992-03-10
Granted: 1998-05-19
Abstract: If a new protocol is introduced in all exchanges (VST), e.g., the ETSI protocol T/S 46-30 in Europe, the old protocol (e.g., 1TR6 in Germany) is to be replaced by the ETSI protocol in all terminals without the need for an on-site hardware/software adaptation.            To accomplish this, the terminal is provided in advance with two protocols (1TR6, ETSI-T/S 46-30) (stored in EEPROMs,  for example), and by means of an unambiguous status inquiry at the time of conversion in the exchange, the latter is interrogated for the current protocol. The terminal is then operated in accordance with a status message indicating the protocol being used by the exchange.
Patent CA-2064303-C (CA)
Title: Process for converting natural gas to synthesis gas
Inventor: KOBYLINSKI THADDEUS PRUS
IPC: B01J8/06
Filed: 1992-03-27
Granted: 2002-02-05
Abstract: A process for converting natural gas to synthesis gas includes the steps of subjecting a homgeneous mixture of natural gas and air to partial oxidation in the presence of a bifunctional partial oxidation/steam reforming catalyst and a sufficient amount of water to control reaction temperature, and subjecting the resulting product to steam reforming in order to substantially completely convert unconverted alkanes to carbon monoxide and hydrogen.
Patent CA-2070561-C (CA)
Title: Portable medical questionnaire presentation device
Inventor: TURCOTTE WILLIAM E II
IPC: G09B7/02
Filed: 1992-06-05
Granted: 2003-08-12
Abstract: A hand-held, battery-powered medical questionnaire presentation device is provided for use by a patient. The device has means for displaying questions to the patient, a limited number of keys by which the patient can enter answers, and a memory device for storing the patient's answers. The device is controlled by a pre-programmed microcomputer which stores in a memory the text of user instructions, medical or health-related questions, and words to be used in printed reports. The microcomputer is programmed to tally the patient's answers and, on the basis of that information and objective data supplied by a medical staffer, to present an evaluation of aspects of the patient's medical condition or health status. The evaluation may consist of recommendations for tests, an analysis of the patient's general medical condition, an analysis of the patient's surgical risk, an analysis of the patient's functional health status, recommendations for counseling the patient, recommendations for health-related lifestyle improvements, or any other conclusions which may be inferred from the patient's responses. The questions and the answer-evaluation software are stored in a readily removable and replaceable integrated circuit module. A variety of specialized questionnaires targeting particular health risks and medical conditions may be provided on interchangeable modules.
Patent CA-2074053-C (CA)
Title: X-ray absorbing glass compositions
Inventor: JONES JAMES V
IPC: H01J29/86
Filed: 1992-07-16
Granted: 1996-10-08
Abstract: A glass, which is particularly adapted to be melted in conventional glass melting furnaces and formed on a molten tin bath, and which demonstrates exceptional absorption of X-rays with a minimum linear absorption coefficient, measured at 0.6 Angstroms, of 24/cm. and having excellent resistance to electron browning and/or X-ray browning and contains the following components, by weight percent:  SiO2 and Al2O3 constituting about 57.0 to 68.0% with SiO2 constituting about 57.0 to 66.0% and Al2O3 constituting about 0 to 5.0%;  K2O and Na2O constituting about  10.0 to  18.0% with K2O constituting about 7.0 to 11.0% and Na2O constituting about 4.0 to 8.0%;  BaO and  SrO constituting about  16.0 to 24.0% with  BaO constituting about 0 to 13.0% and SrO constituting about 11.0 to 21.0%; and CeO2 constituting about 0.1 to 1.0%.
Patent CA-2078144-C (CA)
Title: Coating composition
Inventor: BROOKS RODNEY R
IPC: C08L83/08
Filed: 1991-03-26
Granted: 2002-07-30
Abstract: A primer composition for application to a substrate to promote adhesion of a room-temperature-vulcanisable silicone rub-ber coating comprises (A) an aminosilane material, (B) a chlorinated polyolefin and (C) a room-temperature-curable polydiorga-nosiloxane. The aminosilane material (A) is a primary amine-functional silane or the reaction product of a primary amine-func-tional silane with an epoxy-functional silane or an alpha, omega-dihydroxypolydimethylsiloxane oil.
Patent CA-2083044-C (CA)
Title: Metaldehyde-containing pesticides
Inventor: MISSELBROOK JOHN
IPC: A01N35/02
Filed: 1991-05-17
Granted: 2001-03-20
Abstract: The pesticidal effectiveness of metaldehyde, which is difficult to dissolve or disperse, can be improved by mixing it with one or more surface active agents and milling to a fine particle size, preferably less than 30 microns, and subsequent application, optionally with the addition of a suitable film-forming polymer, such as a styrene acrylic latex, to a carrier material such as bran. meal, grain, flour or finely divided silica. Finely milled metaldehyde formulations made this way are highly effective molluscicides.
Patent CA-2085645-C (CA)
Title: Improvements relating to smoking products
Inventor: HEMSLEY STEPHEN ROSS
IPC: A24B3/14
Filed: 1992-12-17
Granted: 1998-11-17
Abstract: In a method of making a smoking product a mixture comprising  a  particulate  bulk  material,  tobacco  for example, a binder, sugar, ammonia and an ammonium salt, preferably with the addition of water,  is extruded to provide a coherent extrudate.
Patent CA-2094645-C (CA)
Title: Optical matrix switch
Inventor: SAITO KAZUHITO
IPC: H04B10/25
Filed: 1993-04-22
Granted: 1999-07-06
Abstract: An optical matrix switch includes a first guide mechanism having plural guide portions arranged in parallel, a first slider for holding an optical fiber, the first slider being freely slidably mounted along a guide portion of the first guide mechanism, a first partition member for isolating a surplus-length portion of the optical fiber along the guide portion of the first guide mechanism the optical fiber being connected to the first slider, and first drive means for moving the first slider along the guide portion of the first guide mechanism.
Patent CA-2111980-C (CA)
Title: A position indicating system
Inventor: LANS HAKAN
IPC: G01S1/00
Filed: 1992-06-29
Granted: 2002-08-20
Abstract: A plurality of movable objects as aircraft are provided with GPS receivers, enabling the individual determination of longi-tude and latitude. Further, the receiver will also give a very precise time.  According to the invention, this precise time is used to enable all objects of the plurality to transmit in a predetermined radio frequency their identities and positions in precisely deter-mined time blocks. By allocating the frequencies in VHF or UHF, the range of receivability is limited, such that the system may be worldwide. Transmissions may be received by all the participants as well as by air traffic monitoring centers at ground.
Patent CA-2114817-C (CA)
Inventor: HOCH JOHN JOSEPH
IPC: B60K20/00
Filed: 1994-02-02
Granted: 1997-12-16
Abstract: A hydrostatic transmission control mechanism includes a hand lever engagable by an operator, and a member to which the hand lever is directly mounted.  The member is pivotally mounted to the vehicle and is operatively coupled with the transmission for adjusting the speed of the vehicle as the operator shifts the hand lever.  The member includes a generally curved and concave cam surface which interacts with a neutral return cam follower to provide a relatively large effective lever arm extending between the member's pivot axis and the direction of force applied to the cam surface by the cam follower when the member is in positions corresponding to high vehicle velocity, thereby allowing the member to be pivoted back to its neutral position with only a relatively small force.
Patent CA-2115497-C (CA)
Title: Rewinding machine for coreless winding of a log of web material with a surface for supporting the log in the process of winding
IPC: B65H35/10
Filed: 1994-02-11
Granted: 1999-03-09
Abstract: A rewinding machine for the production of logs (R) of web material  (N)  without  a  core  comprises:  a  first winding roller (1) onto which the web material is fed; a second winding roller (3) rotating in the same direction as the first roller and forming a nip  (4)  therewith through which the web material passes; means (15,  17) to move the surface of said second winding roller (3) toward said first winding roller (1); and means to sever said web material at the end of the winding thereof to for a log (R). Provision is also made for a surface (21, 21A) supporting the log (R2) in the process of formation and located upstream of the nip (4) between said rollers (1, 3).
Patent CA-2124583-C (CA)
Title: Synthetic compounds and compositions with enhanced cell binding
Inventor: BHATNAGAR RAJENDRA S
IPC: A61P43/00
Filed: 1992-12-03
Granted: 2010-08-10
Abstract: Compositions of the invention include composites comprising a biomaterial carrying compounds with enhanced cell binding with respect to collagen. These composites are useful for soft and hard tissue repair or reconstruction. Suitable compounds with enhanced cell binding include synthetic peptides that mimic the conformation necessary for recognition and docketing of collagen binding species (such as cell surface receptors for collagen and fibronectin). Hydrogel matrices as the biomaterial promote cell attachment to the matrix and cell migration into the matrix.
Patent CA-2126925-C (CA)
Title: Setback control for hvac system
Inventor: WERBOWSKY LAURIE L
IPC: F24F11/00
Filed: 1994-06-28
Granted: 1998-01-27
Abstract: A setback control for an HVAC system is selectable by depressing a switch on a control panel associated with a programmed microprocessor.  The programmed microprocessor is operative to thereafter change the setpoint temperature by a predefined amount each hour until a predetermined number of hours have passed.  The set point temperature is thereafter held for a further hourly count before being returned to the starting setpoint temperature.  The directional change in setpoint temperature is a function of whether the HVAC system is in a heating or cooling mode of operation.