baber/WOPTO huggingface dataset:
Patent CA-2085309-C (CA)
Title: Pneumatic elevator using suction and atmospheric pressure as force generators
Inventor: SORS CARLOS ALBERTO
IPC: B66B11/04
Filed: 1992-12-14
Granted: 1999-01-19
Abstract: A novel pneumatic vacuum lift elevator is provided herein. Such pneumatic vacuum lift elevator includes a vertical tube of straight axis and having a smooth interior. A movable transport cab is mounted coaxially in the tube for the transporting of passengers, etc. A plurality of access doors is provided, each door having an hermetic closure at different levels of concordance with the respective floors. An air suction device is arranged in the upper end of the vertical tube, the air suction device being capable of causing a depression zone above the roof of the cab, and an atmospheric air intake is arranged at the lower area of the tube. A sliding and sealing trimming is arranged at the upper part of the external wall of the cab between the external wall and the tube so that the cab, in effect, is a piston which is in sliding contact with the tube. A command console for the suction device is arranged inside the cab. Valves are provided for regulating the air inflow and air outflow in the depression zone. Locks are arranged at the cab which cooperate with supports provided in the internal wall of the vertical tube above the access doors. Braking devices in the form of brake shoes are operable by a diaphragm which is located in the roof of the cab by means of a pressure differential.
Patent CA-2086575-C (CA)
Title: Method for reducing emissions when burning nitrogen containing fuels
Inventor: LEE YAM Y
IPC: F23C99/00
Filed: 1992-12-31
Granted: 1999-07-13
Abstract: The amount of N2O in flue gases discharged from a first fluidized bed combustion system is minimized by adding an N2O decomposing catalyst in a reactor stage downstream of the combustor.  The catalyst preferably is a calcium based sorbent, such as CaO or limestone, although NiO and other catalysts also may be utilized.  Typically, the N2O decomposition takes place without increasing the temperature of the flue gases above the 700-1000°C level that exists in the combustor.  However, under some circumstances, if a second fluidized bed is provided as the reactor stage, additional fuel and oxygen can be added to increase the temperature of the flue gases to insure that it is over 800°C   After N2O decomposition, the flue gases may be passed through pressurized filter tubes, or through a superheater, economizer, air preheater, optional cyclone separator, and baghouse filter   A cyclone separator is preferably provided between the combustor and reactor stage, and the removed particles are recirculated to the combustor. Removal of particles, including unused sorbent, after the reactor stage also preferably takes place, with recycle to the reactor stage (if a fluidized bed stage) and/or to the combustor.
Patent CA-2087425-C (CA)
Title: 2'-fluorofuranosyl derivatives and novel method of preparing 2'-fluoropyrimidine and 2'-fluoropurine nucleosides
IPC: C07H1/00
Filed: 1991-07-19
Granted: 1998-08-04
Abstract: The instant invention is drawn to 2'-fluoroarabinofuranosyl compounds and a process for preparing same.
Patent CA-2090312-C (CA)
Inventor: SANTHANAM ANAKKAVUR T
IPC: C23C16/30
Filed: 1991-05-15
Granted: 1995-08-29
Abstract: Provided is a coated cutting tool (10) having a binder enriched substrate (18). The coating includes at least one chemical vapor deposited (CVP) layer (30) and at least one physical vapor deposited (PVD) layer (34). The PVD layer contains residual compressive stresses.
Patent CA-2092998-C (CA)
Title: Variable gain servo assist
Inventor: SCHWITALLA J DAVID
IPC: B62D6/02
Filed: 1992-07-29
Granted: 1995-12-05
Abstract: A variable gain control apparatus (100) for a servo assist system (10) includes a position sensor (56), a valve (26), a con-troller (34) and an actuator (30). The valve (26) has an actuated member (72) and a variable flow orifice (80) to communicate hy-draulic fluid between the high pressure supply line (18) and a reservoir (16) of hydraulic fluid. The position of the actuated mem-ber (72) determines the cross-sectional area of the variable flow orifice (80). The position sensor (56) determines the present position of the actuated member (72). The controller (34) determines a position error between the present position of the actuated member (72) and a varying prededtermined position of the actuated member (72). The actuator (30) in response to the position error actuates the actuated member (72) to eliminate the position error so that assist pressure to the servo assist system (10) is vari-ed as a function of the varying predetermined position.
Patent CA-2094914-C (CA)
Title: Anthracycline analogues bearing latent alkylating substituents
Inventor: FARQUHAR DAVID
IPC: A61P31/04
Filed: 1991-10-16
Granted: 1998-02-10
Abstract: The present invention is a compound having structure (I) where: anthracycline is doxorubicin, daunorubicin or a derivative thereof; N is the 3' nitrogen of daunosamine; Ra is H or alkyl; X is O, S, CRc2 or NRc where Rc is H or alkyl; Rb is alkyl or aryl; n is 1 to 6; and m is 0 to 6. Ra and Rc are preferably H, methyl, ethyl, propyl or butyl, although other alkyl substituents are usable. Rb is alkyl or aryl. The compound of the present invention as described above is activatable in vivo by esterases and spontaneous dehydration to form an aldehyde. The aldehyde may couple to nucleophiles of intracellular macromolecules. The compounds of the present invention are cytotoxically effective in the inhibition of human mycloma cells.
Patent CA-2096679-C (CA)
Inventor: WHITE THEODORE BAXTER
IPC: A01K63/04
Filed: 1993-05-20
Granted: 2000-08-08
Abstract: The water filtration apparatus is based on the principles of swirl-separation, flow-straightening and biological filtration. The waste stream is introduced into a swirl chamber. Overflow from the swirl chamber is introduced into a biological chamber in the form of a vertically-oriented tube bundle, where it is straightened, its velocity is reduced and it is allowed to contact a biologically active media. The overflow from the tube bundle is then removed. Underflow is removed from the bottom of the swirl chamber.
Patent CA-2104191-C (CA)
Title: Reduction of stimulated brillouin scattering in a fiber optic transmission system
Inventor: FISHMAN DANIEL A
IPC: H04B10/572
Filed: 1993-08-16
Granted: 1998-08-25
Abstract: A technique for reducing the power threshold at which stimulated brillouin scattering ("SBS") occurs within an optical fiber by directly modulating a conventional laser generating an optical signal propagated along that fiber. The modulation is accomplished by employing an alternating waveform to induce a dither upon the laser output. The specific frequency of the alternating waveform is chosen to be very much lower than the low frequency cut-off of any receiver coupled to the optical fiber, but sufficiently high enough to efficiently suppress the Brillouin gain. This dithering causes the laser to be frequency modulated, thereby broadening the effective linewidth of the laser output and increasing the SBS power threshold.
Patent CA-2104231-C (CA)
Title: Oblong acetabular cup
Inventor: CHRISTIE MICHAEL J
IPC: A61F2/34
Filed: 1992-03-06
Granted: 2004-12-21
Abstract: An oblong acetabular cup (40) which includes a cavity (13) for receiving a bearing element (44) is provided. The plane (56) of the opening into the cavity (13) is skewed relative to the prosthesis' longitudinal plane (54) so as to achieve adduction correction, anteversion correction, or both adduction and anteversion correction. In certain preferred embodiments, the prosthesis (40) is constructed from two components (62, 64 or 102, 104) which can be oriented with respect to one another to achieve different directions and amounts of anteversion correction. In some embodiments, the two components (62, 64) form a cusp (70) in the outside surface of the prosthesis (40). Surgical instruments (94) and surgical methods for implanting the prostheses (40) are disclosed.
Patent CA-2107038-C (CA)
Title: Method of making electrical cable having a corrugated shield
Inventor: WANNAMAKER CHRISTOPHER JOHN
IPC: B05D1/26
Filed: 1993-09-27
Granted: 1998-06-30
Abstract: A method is provided for making an electrical cable in which a core is enclosed in a corrugated metallic tape over which a coating of polymeric material is extruded at high temperature  and  under  vacuum.  In  order  to  prevent penetration of water between the corrugated tape and the cable core, when after extrusion of the plastic coating it is cooled in a water trough, a strip of silicone is placed in at least one and preferably several corrugations across the width of the tape at the front end thereof, just prior to it being wrapped about the cable core.
Patent CA-2110163-C (CA)
Title: Pump control system for a downhole motor-pump assembly and method of using same
Inventor: ESCUE NELSON B
IPC: F04B17/04
Filed: 1991-05-29
Granted: 1998-09-29
Abstract: A new and improved control system for monitoring and controlling the operation of a downhole linear d.c. motor-pump assembly (10) and a method of using it for producing a sufficient reciprocating pumping action to lift well fluid through the producing tubing of a well to the ground surface. The system includes a surface monitoring station (11) that is in radio communication with a plurality of remote downhole motor-pump assemblies. Each motor-pump assembly (10) has a surface motor controller, a downhole motor-pump cartridge unit (13) that is adapted to be received in a downhole cartridge sleeve assembly that maintains the cartridge unit in a stationary position for pumping purposes. The motor-pump cartridge unit may be raised or lowered by a control cable (19) within the production tubing (16) for helping to facilitate the repair or replacement of the motor-pump cartridge unit. The motor-pump assembly also includes a plurality of sensors for monitoring the conditions of the well downhole as well as the efficiency of the motor-pump cartridge unit.
Patent CA-2114214-C (CA)
Inventor: GOLDSTEIN YURI
IPC: H04L1/20
Filed: 1992-07-17
Granted: 2004-10-12
Abstract: The preferred method comprises measuring the signal/noise ratio and intermodulation distortion (IMD) relating to signals being transmitted over a channel (25) and adjusting the transmitting power of the,transmitting modem (209) below a maximum permissable power in response to the measurements in order to reduce the error rate of the data transmission, the error rate being a function of both the signal/noise ratio and he IMD. Theoretically, the power can be adjusted to an optimal level, as the decrease in power increases he error rate due to signal/noise ratio according to a first function, but decreases the error rate due to IMD according to a second function. A first preferred manner of determining the final power level to be utilized is to calibrate a modem according to the techniques (e.g., Treillis precoding, etc.) it utilizes, and to utilize a look-up table for that modem to identify the desired power level based on the measured signal/noise ratio and the measured IMD. A second preferred manner is to decrease the signal power according to a formula which is a function of the third harmonic IMD.
Patent CA-2116144-C (CA)
Inventor: PARAYIL THOMAS R
IPC: C21D8/02
Filed: 1994-02-22
Granted: 2001-05-01
Abstract: A pressure-bonded composite material includes at least one layer of a stabilized low carbon steel core material and one layer of a stainless steel joined at an interface, wherein the stabilized carbon steel includes columbium and at least one other carbide-forming element in amounts effective to prevent carbon migration from the carbon steel to the stainless steel and the composite material has a physical grain size no larger than ASTM #6.
Patent CA-2116839-C (CA)
Title: Dispositif de freinage electro-hydraulique d'un train de roues d'aeronef
Inventor: BOURGUET VINCENT
IPC: B60T8/92
Filed: 1994-03-02
Granted: 1997-08-19
Abstract: L'invention concerne un dispositif de freinage électro-hydraulique d'un train de roues d'aéronef. Le dispositif comporte deux sources de pression hydraulique alimentant chacune un circuit hydraulique menant, par l'intermédiaire de platines de commande de freinage, aux freins des deux groupes de roues. Un circuit relie, par deux clapets navettes, soit une électrovanne commandée électriquement par l'unité de pilotage, soit un double distributeur progressif commandé mécaniquement par les pédales de frein, à une entrée des platines. Un deuxième circuit relie directement une électrovanne à une deuxième entrée de chacune desdites platines. Chaque platine inclut deux circuits internes symétriques ayant une servo-valve par frein concerné, qui sont interconnectés au niveau d'un clapet commandé respectif. En cas de panne sur un circuit, les servo-valves associées à l'autre circuit permettent alors un contrôle du freinage et de l'anti-patinage selon un mode tandem appairé, avec une reconfiguration automatique.
Patent CA-2117330-C (CA)
Title: The use of psoralen compounds to inhibit restenosis following angioplasty
Inventor: BISACCIA EMIL
IPC: A61M1/36
Filed: 1992-12-17
Granted: 2007-07-24
Abstract: The occurence of restenosis following percutaneous transluminal coronary angioplasty is prevented or inhibited using a photopheresis treatment method.  In accordance with the photopheresis treatment method, a photoactive compound such as 8-methoxypsoralen is administered to the patient's blood or affected tissue, or some fraction thereof, in vitro or in vivo using conventional administration routes. A portion of the patient's blood or affected tissue is then treated (preferably, extracorporeally) using photopheresis, which comprises subjecting the blood or affected tissue to electromagnetic radiation in a wavelength suitable for activating the photoactive compound, such as ultraviolet light, preferably long wavelength ultraviolet light in the wavelength range of 320 to nm, commonly called UVA light. The treated blood or affected tissue, or a fraction thereof, is returned to the patient (in the case of extracorporeal photopheresis) or remains in the patient (following in vivo photopheresis).
Patent CA-2118878-C (CA)
Title: Speaker verification system and process
Inventor: SCHOEFFLER MAX S
IPC: G10L15/10
Filed: 1994-03-11
Granted: 1998-04-28
Abstract: An individual's speech sample, obtained for the purpose of speaker verification, is used to create a "protected" model of the speech. The protected model, which is stored in a database in association with a personal identifier for that individual, is arranged so that the characteristics of the individual's speech cannot be ascertained from the protected model, without access to an encryption key or other secured information stored in the system. (Fig. 1)
Patent CA-2127555-C (CA)
Inventor: TAMMINMAKI MARKKU
IPC: A61B17/56
Filed: 1993-01-18
Granted: 2003-12-09
Abstract: The invention relates to a surgical instrument for installation of a surgical implant in a living tissue, particularly in connec-tion with a surgical operation. The installation instrument comprising a frame (1) with an installation channel (6), in which the im-plant (1) is designed to be placed in the beginning of installation, as well as an installation part (2) arranged to be placed in the said installation channel (6) and to convey an external force needed for the installation of the implant (I) to the implant, the frame (1) being placed in connection with the tissue in a manner that the implant is placed in the said tissue when it exits the said installation channel (6) at the installation end (9) of the frame (1). The frame (1) comprises further at least one arresting means (7a, 7b) which in the operational position of the frame (1) has contact with the said tissue in order to arrest the installation end (9) of the frame (1) in position in relation to the tissue during the installation of the implant. The installation part (2) is equipped with means (21) for attaching the installation part (2) into a power transmission part (14) arranged to perform a reciprocating movement, whereby the said reciprocating movement is arranged to be transmitted as a periodical movement of the implant (1) through the installation end (9) of the frame (1) into the tissue.
Patent CA-2129461-C (CA)
Inventor: MUELLER BEAT
IPC: C08F2/48
Filed: 1994-08-04
Granted: 1999-12-07
Abstract: The invention relates to a novel process for the manufacture of mouldings, especially contact lenses, in which a soluble prepolymer comprising crosslinkable groups is cross-linked in solution, and also to mouldings, especially contact lenses, obtainable in accordance with that process. The present invention relates also to novel prepolymers that can be used in the process according to the invention, especially derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 that, based on the number of hydroxy groups of the polyvinyl alcohol, comprise from approximately 0.5 to approximately 80 % of units of formula I    wherein R is lower alkylene having up to 8 carbon atoms, R1 is hydrogen or lower alkyl and R2 is an olefinically unsaturated, electron-attracting, copolymerisable radical preferably having up to 25 carbon atoms, to crosslinked polymers, either homo- or co-polymers of those novel prepolymers, to processes for the preparation of the novel prepolymers and the homo- and co-polymers obtainable therefrom, to mouldings made from the said homo- or co-polymers, especially contact lenses made from those homo- or co-polymers, and to processes for the manufacture of contact lenses using the said homo- or co-polymers.
Patent CA-2129581-C (CA)
Inventor: GOEDKEN JAMES F
IPC: G05B9/02
Filed: 1994-08-05
Granted: 2000-09-19
Abstract: A method for recovering from a reset in a microprocessor includes steps of evaluating a predetermined pattern in a volatile memory (102), determining the type of reset which occurred depending upon whether the predetermined pattern is intact (103); and initializing the memory depending upon the type of reset. In particular, all locations in the memory will be initialized if a "power on" reset occurs (107) and initializing only selected portions of the memory if a "static" or "cradled" reset has occurred (104). If a static or cradled reset has occurred, all locations of the memory are initialized except those locations including state information to allow normal operation of the microprocessor. That is, the operation of the microprocessor based device can be restored without interruption after the reset.
Patent CA-2130877-C (CA)
Title: Speech pitch coding system
Inventor: SERIZAWA MASAHIRO
IPC: G10L25/90
Filed: 1994-08-25
Granted: 1999-01-19
Abstract: A plurality of pitch period transition paths are extracted by pitch tracking over a frame, and a path of minimum average prediction gain over the frame is selected from the extracted paths.  A subsequent preliminary pitch selection may be executed in a sub-frame processing to select a plurality of candidates from the neighbourhood of the pitch of the transition path selected for each sub-frame.   The selection uses the inner product of the input speech signal and codebook codevectors.          Finally, a pitch period having a minimum waveform distortion is selected for each sub-frame.
Patent CA-2136354-C (CA)
Title: Composite de revetement de surface selectivement amovible, portant des inscriptions, et methode associee
Inventor: HELF THOMAS A
IPC: B44C1/10
Filed: 1994-06-13
Granted: 1999-08-24
Abstract: On décrit un nouveau composite stratifié de revêtement de surface, portant des inscriptions, et destiné à être appliqué sur un substrat (F) tel qu'un plancher. Le nouveau composite comprend une couche d'adhésif sensible à la pression (16) et une couche d'inscriptions (14), (15) portant l'adhésif sensible à la pression (16) sur un de ses côtés. La couche d'adhésif sensible à la pression (16) fixe la couche portant les inscriptions (14), (15) au plancher (F). La force d'adhérence de l'adhésif sensible à la pression (16) peut aller de 50 à 2000 grammes par centimètre carré. Le nouveau composite comprend en outre une couche (18) d'un polymère transparent et soluble dans les solutions alcalines sur le côté opposé à la couche portant les inscriptions (14), (15). On décrit également une méthode d'application et ensuite de détachement sélectif d'un tel composite portant des inscriptions sur un plancher (F) et de ce dernier.
Patent CA-2138742-C (CA)
Inventor: CARLIN MARK
IPC: B60R21/16
Filed: 1994-12-21
Granted: 1997-02-04
Abstract: An apparatus (30) for controlling an actuatable restraining device includes an accelerometer (60) for providing an electrical deceleration signal having a characteristic indicative of vehicle deceleration.  An electronic controller (64) is connected to the accelerometer (60) and determines an average crash acceleration (AWIN) value in response to deceleration during a vehicle crash condition.  The controller (64) determines a crash velocity value and a variably weighted velocity value (JMM2) equal to crash velocity times a variable weighting factor.  The controller (64) provides an actuation signal to actuate the actuatable restraining device (i) when the average velocity value (AWIN) is greater than a first threshold value (WTHRESH) or (ii) when the variably weighted velocity value (JNM2) is greater than a second threshold value (JTHRESH) and the crash velocity is greater than a third threshold value (VTHRESH).
Patent CA-2140845-C (CA)
Title: Well drilling and servicing fluids which deposit an easily removable filter cake
Inventor: DOBSON JAMES W JR
IPC: C09K8/52
Filed: 1995-01-23
Granted: 2005-10-25
Abstract: The invention provides alkaline water base well drilling and servicing fluids which deposit an easily degradable and removable filter cake on the sides of a borehole during well drilling and servicing operations. The fluids contain one or more polysaccharide polymers, sized bridging particles, and a peroxide selected from the group consisting of alkaline earth metal peroxides, zinc peroxide, and mixtures thereof. The fluids deposit a filter cake containing the peroxide. The invention also provides processes for enhancing the removal of the filter cake which comprises depositing a peroxide-containing filter cake on the sides of the borehole, or on the filter cake already present on the sides of the borehole, and thereafter contacting the peroxide-containing filter cake with an acidic solution to activate the peroxide which thereafter degrades the polysaccharide polymers in the filter cake. Preferably the filter cake containing the degraded polymer is washed with a fluid in which the bridging particles are soluble to remove the entire filter cake(s) from the sides of the borehole.
Patent CA-2143124-C (CA)
Title: Syndiotactic hot melt adhesive
Inventor: ROBERTSON MARTHA HETZEL
IPC: C09J123/10
Filed: 1993-08-20
Granted: 2002-02-19
Abstract: A hot melt adhesive including syndiotactic polypropylene having a polymer chain of at least 80 % racemic dyads and hav-ing a melting point of about 100°C to 180°C.