baber/WOPTO huggingface dataset:
Patent CA-2275748-A1 (CA)
Title: Systeme de recuperation de particules relatif a un outil d'abrasion a l'air
Inventor: DULONG MICHEL B
IPC: A61C17/02
Filed: 1999-06-14
Abstract: L'abrasion à l'air en dentisterie est un procédé qui utilise un jet d'abrasif pour enlever les caries. Les appareils actuels ne récupèrent pas celui-ci. Il est alors dispersé dans l'environnement de travail du dentiste. La présente invention vise à récupérer cet abrasif par l'outil d'abrasion lui-même, en combinant une source de succion avec ce dernier. Pour ce faire, la pièce à main possède à son extrémité un embout flexible qui empêche le jet de s'échapper. Une ouverture dans la paroi permet au dentiste de voir ce qu'il fait sur la dent. Les méthodes pour acheminer l'abrasif et la succion jusqu'à l'intérieur de l'embout peuvent varier ainsi que la méthode de fixation de l'embout flexible, sa forme et la forme de son ouverture.
Patent CA-2282871-A1 (CA)
Inventor: DRUTEL DAMIEN
IPC: C07D201/04
Filed: 1999-09-20
Abstract: The use of methanesulfonic acid as a replacement for sulfuric acid in both stages overcomes oxime deposition problems and side reactions. The preparation of lauryl lactam comprises: (a) A photochemical reaction of cyclododecane, dissolved in an organic solvent, with a nitrosating agent and hydrogen chloride in the presence of methanesulfonic acid to form the oxime of cyclododecanone; and (b) Submission of the oxime to a Beckmann rearrangement in the presence of methanesulfonic acid.
Patent CA-2285074-A1 (CA)
Inventor: DEHNER LEO G
IPC: H04B15/00
Filed: 1998-02-16
Abstract: L'invention concerne un système de radiocommunication (100) mettant en oeuvre un plan de réutilisation des fréquences en envoyant un message (308) simultanément avec d'autres messages dans une pluralité de regroupements de cellules (202-208) utilisant le plan de réutilisation des fréquences, qui fournit un rapport C/I (porteuse-brouillage) de message suffisant pour permettre la réception du message lorsqu'un récepteur (104) est réglé d'après un symbole pilote transmis périodiquement (402-408). Le rapport C/I est inférieur au rapport préféré pour la réception du symbole pilote. Le symbole pilote est émis périodiquement avec d'autres symboles pilotes en diversité temporelle de manière que les émissions de symboles pilotes pour les regroupements de cellules de la pluralité de regroupements de cellules qui sont adjacents se produisent dans des intervalles de temps ne se recouvrant pas, ce qui engendre le rapport C/I supérieur souhaité pour la réception du symbole pilote. Le symbole pilote et le message sont reçus par le récepteur, qui est réglé d'après le symbole pilote de façon à démoduler le message.
Patent CA-2286270-A1 (CA)
Inventor: SCHOENMAN LEONARD
IPC: C01B3/44
Filed: 1998-04-20
Abstract: A novel fluidized bed syngas (FBSG) injector/reactor apparatus and an efficient process for the partial oxidation and steam reforming of light hydrocarbon gases such as methane, to convert such gases to useful synthesis gas containing CO and H2 for recovery and/or subsequent hydrocarbon synthesis. Sources of a light hydrocarbon gas, such as methane, and oxygen or an oxygencontaining gas are preheated and pressurized and injected through gas orifices of an injector at high velocity and comparable momentums into admixture with each other in the desired proportions, at a plurality of mixing chambers or recessed cups which are open to the fluidized bed reaction zone of a reaction chamber and are spaced over the face of the injector, to form a reactant gas premix having a pressure drop of at least 1 % through the injector. The gaseous premix is injected in a time period which is less than its autoignition time, preferably less than 9 milliseconds, at a velocity between about 25 to 1000 feet/second, into a partial oxidation reaction zone comprising a fluid bed catalyst so that the gas mixture reacts in the catalyst bed, to reduce the amounts of CO2, H2O and heat produced by the partial oxidation reaction to favor the desired stoichiometry. The formed syngas is cooled and recovered, such as use in further synthesis processing.
Patent CA-2287279-A1 (CA)
Inventor: KOMULAINEN ANTTI
IPC: D21F5/04
Filed: 1998-04-21
Abstract: The invention concerns a drying unit in the dryer section of a paper or board machine, in which drying unit there is a loop of a drying wire (32; 32a, 32b, 32c, 32d). The drying unit comprises a large-diameter D1 impingement-drying and/or through-drying cylinder (31), which is fitted inside the drying-wire loop (32, 32a, 32b, 32c, 32d). On top of said cylinder (31) and/or in the vicinity of said cylinder, at both sides, smooth-faced heated contact-drying cylinders (30) are placed, whose diameter D2 < D1. The impingement-drying and/or through-drying cylinder (31) is placed in the spaces (KT) underneath the floor level (K1-K1) of the paper machine hall and provided with an openable and closable blow hood (35) so that the removal of broke out of connection with the hood (35) takes place substantially by the force of gravity. The central axes of the contact-drying cylinders (30) placed in the vicinity of said cylinder (31) are placed in the vicinity of, or above, the floor level (K1-K1) of the paper machine hall. The curve sector b of the paper web (W) on the outer face of the drying wire (32; 32a, 32b, 32c, 32d) over said cylinder (31) is b > 180°.
Patent CA-2287620-A1 (CA)
Inventor: KIRKMAN THOMAS R
IPC: C03B9/325
Filed: 1999-10-27
Abstract: A neck ring arm assembly for a glass container forming machine of the individual section type comprising a horizontally extending invert shaft and a vertically extending cylinder with a rack that engages a spur gear attached to the invert shaft to oscillate the invert shaft. In a first embodiment, the invert shaft has an inner annular sleeve keyed to it, and the inner annular sleeve has a polygonal exterior, preferably a hexagonal exterior. First and second outer annular sleeves surround the inner annular sleeve to be oscillatable therewith, but reciprocable with respect thereto.  Each of the first and second outer annular sleeves has a polygonal interior which is complementary to the: polygonal exterior of the inner annular sleeve, and each is provided with a plurality of replaceable wear pads each of which is adjustable toward a surface of the polygonal exterior of the inner annular sleeve to provide for close, low backlash engagement of the inner annular sleeve by the outer annular sleeves over a prolonged duration. A  neck ring carrying arm, made up of a pair of neck ring arm elements each of which is secured to one of the outer annular sleeves, is provided to carry the neck rings and container parisons as the neck ring arm assembly is moved from the blank mold of an I.S.  machine to the blow mold side by the motion of the invert shaft in a first arcuate direction, and to carry the neck rings back to the blank mold side after releasing the parisons to blow molds at the blow mold side by arcuate motion in an opposed arcuate direction.  In an alternative embodiment, which otherwise generally corresponds to the first embodiment, the invert shaft is constructed in a single piece with a polygonal exterior, to perform the functions of the separate invert shaft and inner annular sleeve of the first embodiment.
Patent CA-2287681-A1 (CA)
Inventor: YAO JAMES JING
IPC: E21B17/042
Filed: 1999-10-28
Abstract: A threaded end of a drill rod is formed from a sleeve secured to one end of the body. The sleeve has a threaded bore to receive a threaded end of an adjacent component and is secured to the body of the rod by an interference fit between a bore and spigot on the two components.
Patent CA-2287760-A1 (CA)
Inventor: BLANCHETTE LUC
IPC: G02C1/06
Filed: 1999-10-29
Abstract: The present invention describes sport eyeglasses having removable lenses formed of a one piece plastic molded frame that includes a pair of lens receiving sections, a pair of opposite strap receiving temple sections and a central bridge section integral with the lens receiving sections. The bridge section is split to define an upper bridge part and a lower bridge part which are capable of being manually distanced from one another so as to define a gap and allowing lenses to be mounted in the lens receiving sections. A fastening element extends through both bridge parts to secure them together once the lenses are installed in the lens receiving sections.
Patent CA-2289954-A1 (CA)
Inventor: VENTURA PAUL A
IPC: H04M11/00
Filed: 1999-11-16
Abstract: The present invention relates to a method and apparatus of automatically switching functionality of telephone lines in an office telephony system from a first function to a second function based on predetermined criteria. In order to avoid wasting telephone line resources in an office system, a switch is provided to switch the functionality of a telephone line from voice communication to data communication and vice versa.  The predetermined criteria may include time of day or the day of the week. The switch is a self-contained unit which also monitors the telephone lines.
Patent CA-2290759-A1 (CA)
Title: Intelligent switch control circuit
Inventor: BAER MARK E
IPC: H02P25/14
Filed: 1999-11-25
Abstract: A sensing circuit is useful with a power outlet and a power tool having power supplied thereto via the power outlet. The sensing circuit includes a generator, a transmitter, and a detector. A first signal having a high frequency is developed by the generator and supplied to a first terminal of the power outlet by the transmitter. The detector is coupled to the second terminal of the power outlet and tuned in accordance with the high frequency to develop a second signal indicative of whether the power tool is coupled to the power outlet. The sensing circuit may be used in conjunction with a regulating circuit and a two- position switch useful for controlling the electrical energy supplied to the power tool and a vacuum cleaner having the power outlet disposed thereon.
Patent CA-2294384-A1 (CA)
Title: Olefin polymerization process
Inventor: FOLLESTAD ARILD
IPC: C08F4/659
Filed: 1998-06-16
Abstract: The present invention relates to a process for olefin polymerization, in particular for the preparation of ethylene or propylene homo or copolymers, which process comprises at least two polymerization stages, a relatively earlier of said stages comprising polymerizing an a-olefin in the presence of hydrogen and an .eta.-liganded olefin polymerization catalyst whereby to produce a first polymerization product, and a relatively later of said stages comprising polymerizing said .alpha.-olefin in the presence of an olefin polymerization catalyst whereby to yield a polymerization product having a lower MFR2 than said first polymerization product. The present invention further relates to the olefin polymer products of such a process.
Patent CA-2295985-A1 (CA)
Inventor: THORNTON RICHARD T
IPC: A61N5/10
Filed: 1998-07-06
Abstract: A compact cartridge (20) for an afterloader (10) includes a housing (21) containing a radioactive source wire, and a dummy test wire each accommodated in a helical groove on the periphery of a wire storage drum (124). The wires are contained in the grooves (125) by low friction bearings such as rollers (140) so that advancement of the wire from the drum is under very low friction conditions. The cartridge is removably inserted in the head (16) of an afterloader apparatus that engages a primary drive system (38), and an emergency retract mechanism (40) mounted in the head. The cartridge also contains an electronics board (123) with software for updating the software in the control electronics for the afterloader.
Patent CA-2296784-A1 (CA)
Title: Exit guard system
Inventor: ROSS DONALD K
IPC: G08B13/196
Filed: 2000-01-21
Abstract: An exit guard system automatically detects movement of a subject along an exit path in an unauthorized direction. A first video camera is positioned for video imaging movement of a subject along the path, while a second video camera images the subject for identification. Multiple video motion detectors operate in conjunction with the first video camera to determine direction of movement of a subject along the path. A CPU  operates with the video motion detectors under an exit guard program to provide a watching mode, during which frames of the second video camera are continuously grabbed and saved. Audible and/or visual alarm signaling devices are operated by the CPU in an alarm mode in response to traffic of a subject in the unauthorized direction. A video monitor displays modes of operation of the system and control devices allow operator selection and control of modes of operation of the system. Remote access to the system for control, monitoring or other purposes is provided by data modem feature. Method of using such system for guarding movement of a subject along the path is disclosed.
Patent CA-2297586-A1 (CA)
Inventor: HO KA KEE
IPC: D21C9/02
Filed: 2000-02-01
Abstract: The process of the present invention purposefully precipitates a portion of the dissolved lignin onto pulp fibers to improve pulp yield of unbleached pulp.      The resulting retention of lignin on the pulp creates an increase in pulp yield. Washing the pulp in a series of washer stages sequentially removes entrained lignin. Between each of the washer stages, adding dilution water repulps a pulp mat that exits from a prior washer stage and creates a pulp stream for a next washer stage. After at least one of the washer stages, adding an acidifying agent to the pulp stream forms a pulp product by precipitating the entrained lignin onto cellulosic fibers contained in the pulp stream.    Finally, the process removes the pulp product from the series of washer stages with the pulp product having at least about a 1 unit increase in Kappa number.
Patent CA-2299751-A1 (CA)
Inventor: BRIGGS THOMAS V
IPC: B62B3/02
Filed: 2000-02-29
Abstract: A snowmobile support dolly has a frame with forward swivel casters and rear swivel casters. The frame includes a pair of channels for supporting the snowmobile skis, and a rear post for supporting the snowmobile track above the frame.
Patent CA-2299809-A1 (CA)
Title: Traction device for a wheeled vehicle
Inventor: ROBESON PALMER
IPC: B60B15/00
Filed: 2000-03-01
Abstract: The present disclosure concerns an emergency traction device which may be easily and securely fitted on vehicles having tires of different diameters and widths. A single winch sizes and secures the traction device for the proper tire diameter and then for the proper tire width.
Patent CA-2301091-A1 (CA)
Inventor: TROKHAN PAUL DENNIS
IPC: D21F11/00
Filed: 1998-07-31
Abstract: It is desirable to produce a strong, and at the same time soft, fibrous webs comprising at least two micro-regions disposed in a non-random and repeating pattern. There is provided a method for a novel process wherein the fibers of a first micro-region are interconnected with a fiber-bonding substance, while the second micro-region fibers are not interconnected. The fibers of the micro-regions are bonded together by a process of softening, flowing, and immobilization of the fiber-binding substance between the cellulosic fibers as well as heating the web containing the fiber-binding substance; pressurizing the web to cause the fiber-binding substance to flow; and immobilizing the fiber-binding substance.  There is also provided an apparatus for making a single lamina fibrous web comprising press members with surfaces mutually parallel and opposed, capable of receiving the web and a means for applying heat to the web and for pressurizing the web.
Patent CA-2302681-A1 (CA)
Inventor: LEE FU-MING
IPC: C10G7/08
Filed: 1998-09-02
Abstract: An improved process for the recovery of aromatic compounds from a mixture containing aromatic and non-aromatic compounds and method for retrofitting existing equipment for the same is provided. The improved process comprises the steps of recovering aromatic compounds via parallel operation of a hybrid extractive distillation/liquid-liquid extractor operation and variations thereof. Methods of quickly and economically retrofitting existing recovery process equipment for use with the improved aromatics recovery process are also disclosed.
Patent CA-2304009-A1 (CA)
Inventor: LEE ERIC R
IPC: B41J2/025
Filed: 1998-10-26
Abstract: A droplet generator (22) comprises a fluid reservoir (58) having a side wall (60) made of glass or quartz, and an end cap (96) made from a silicon plate. The end cap (96) contains a micromachined aperture (24) through which the fluid is ejected. The side wall (60) is thermally fused to the end cap, and no adhesive is necessary. This means that the fluid only comes into contact with the side wall (60) and the end cap (96), both of which are chemically inert. Amplitudes of drive pulses received by the fluid reservoir (58) determine the horizontal displacements of droplets relative to the ejection aperture (24). The drive pulses are varied such that the dropper (22) generates a twodimentional array (50) of vertically-falling droplets. Vertical and horizontal inter-droplet spacings may be varied in real time. Applications include droplet analysis experiments such as Millikan fractional charge searches and aerosol characterization, as well as material deposition applications.
Patent CA-2306278-A1 (CA)
Inventor: SMEDAL ARNE
IPC: B63B27/24
Filed: 1998-10-07
Abstract: A swivel device for a ship (10) equipped so as to serve as i.a. a production and/or a drilling ship by exploitation of submarine wells or reservoirs, respectively, containing oil and/or gas, where the ship (10) is formed with a vertically through-going shaft (12). Within the shaft (12), a turret (16) having a substantially vertical axis is rotatably mounted in relation to the hull and is included in said swivel device. Thus, when the turret (16) is moored to the seabed, the ship (10) may turn about said vertical axis, dependent on wind and/or sea currents. The swivel device comprises a first pipe (32) substantially concentrical with the turret (16) and with a smaller external diameter than the internal diameter of the turret (16), so that, between the outside of said first pipe (32) and the inner side of the turret (16), a vertically through-going annulus is formed for accommodating of several production risers (34). Said first pipe's (32) bore constitutes a vertically through-going passage for separate passage and accommodation of a drill pipe string. Said first pipe (32) is connected to the turret (16).
Patent CA-2307704-A1 (CA)
Title: Bar hanger and mounting clip assembly
Inventor: PFALLER MARK J
IPC: F16B5/12
Filed: 2000-05-05
Abstract: A bar hanger and mounting clip assembly for securing an electrical box between two opposed Tee bar elements in a ceiling structure is provided which comprises a spanning bar which spans between the two opposed Tee bar elements; first and second clips at opposed ends of the spanning bar for attaching the spanning bar to the two opposed Tee bar elements; an electrical box; and a mounting clip for securing the electrical box to the spanning bar, the mounting clip including a tension leg for initially holding the electrical box in position on the spanning bar before the clip is securely fastened to the electrical box.
Patent CA-2308248-A1 (CA)
Inventor: KATERKAMP ANDREAS
IPC: G01N21/64
Filed: 1998-10-27
Abstract: A process and device are disclosed for carrying out fluorescence immunoassays.  Light is directed from at least one light source onto a surface at one end of an optical fibre and the light coupled into the optical fibre is used to cause at least one labelling substance bound to a chemical or biochemical partner of a general receptor-ligand system to become fluorescent by evanescent field excitation at the surface of the optical fibre. The disclosed solution should allow high precision fluorescence immunoassays to be carried out at low cost and in a short time. For solving this problem, the fluorescent light is decoupled from the optical fibre and directed by optics onto an optical detector for measuring the intensity of the fluorescent light. The optical fibre is contained in a measurement chamber formed in the piston of a piston-cylinder unit and connected to the inside of the cylinder through an inlet formed in the piston.
Patent CA-2308520-A1 (CA)
Title: Strictly alternating poly(alkylene oxide ether) copolymers
Inventor: D ACUNZO FRANCESCA
IPC: A61K38/00
Filed: 1998-11-06
Abstract: Polyether copolymers characterized by strictly alternating poly(alkylene oxide) and aromatic diol monomeric repeating units, wherein the combination of repeating units is effective to provide the polyether with a hydrophilic/hydrophobic ratio at which aqueous micelle self-assembly occurs. Stable aqueous dispersions of hydrophobic drugs are also disclosed, as well as medical implants and drug delivery devices for implantation.
Patent CA-2310622-A1 (CA)
Title: Techniques and systems for analyte detection
Inventor: GRUBBS ROBERT H
IPC: G01N27/12
Filed: 1998-08-07
Abstract: Techniques are used to detect and identify analytes. Techniques are used to fabricate and manufacture sensors to detect analytes. An analyte (810) is sensed by sensors (820) that output electrical signals in response to the analyte. The electrical signals may be preprocessed (830) by filtering and amplification. In one embodiment, a plurality of sensors are formed on a single integrated circuit. The sensors may have diverse compositions.
Patent CA-2311607-A1 (CA)
Inventor: AZZATO ROBERT N
IPC: B42D17/00
Filed: 2000-06-14
Abstract: A security hardware device for securing multi-leafed materials within a binder or to a spine. The device includes an inner box positioned within an outer sleeve. A top grip is mounted on one end of the box, and a bottom grip is mounted on the opposing end of the outer sleeve. A screw  passes through the bottom grip on the outer sleeve and enters a passage for receiving the screw in the box. By turning the screw into engagement with the box, the box is drawn into the sleeve, and the top grip is pulled toward the bottom grip. Mufti-leafed materials are mounted onto the device by placing the materials between the top grip and the bottom grip and then turning the screw into engagement.
Patent CA-2312553-A1 (CA)
Inventor: HARMAN TODD D
IPC: A63B57/00
Filed: 2000-06-27
Abstract: A sand penetrability gauge for golf course bunker sand, having a probe shaft for penetrating into bulk sand, a weight or spring for reproducibly applying force to advance the probe shaft into bulk sand, the probe shaft being movably connected to the weight or spring, and measuring indicia associated with the probe shaft for measuring displacement of the probe shaft, With a cross-sectional area of the probe shaft sad the force of the weight or spring selected so that the measuring indicia will provide a displacement measurement when the probe is driven into golf course sand bunker sand.
Patent CA-2317381-A1 (CA)
Title: Use of mode-coupled optical fiber in communications systems
Inventor: WHITE WHITNEY
IPC: H04B10/2581
Filed: 2000-09-07
Abstract: Mode-coupled plastic or glass optical fibers are used in communications systems to carry optical signals between transmitters and receivers. In order to overcome the high attenuation characteristics of mode-coupled optical fibers, the launch power used to transmit signals over the optical links is higher than those typically used in comparable conventional communications systems that rely on standard single-mode or multimode glass optical fibers. In order to accommodate the larger launch power levels, the communications systems are designed with receivers having a larger dynamic range than those used in conventional communications systems. In addition, the mode-coupled optical fibers can have diameters on the order of 50-62.5 microns, or even larger, thereby enabling the use of relatively simple and inexpensive butt coupling between the fibers and other system components (e.g., transmitters and receivers).