baber/WOPTO huggingface dataset:
Patent CA-2198618-A1 (CA)
Title: Compositions containing pentaerythritol tetraesters and process for production thereof
Inventor: CHISHOLM DANIEL
IPC: B01J31/12
Filed: 1996-07-09
Abstract: Disclosed is a process for producing tetra(3-alkylthiopropionate) esters of pentaerythritol, wherein each alkyl portion contains 4 to 20 carbon atoms, wherein pentaerythritol and one or more lower alkyl, e.g. methyl, 3-alkylthiopropionate esters are reacted in the presence of organotin catalyst at elevated temperature. Also disclosed is a composition of matter comprising said tetraester as the major component and also comprising the corresponding triester and lower alkyl 3-alkylthiopropionate.
Patent CA-2202910-A1 (CA)
Title: Echo cancellation using cross-correlation of buffered receive and transmit sample segments to determine cancelling filter coefficients
Inventor: SHEPPARD PHILIP JULIAN
IPC: H04B3/23
Filed: 1995-11-07
Abstract: An echo detection system comprises data stores (8, 18) for storing signals from up and down channels (5, 15) respectively. The signals undergo pre-processing (9, 19) to identify signals forms characteristic of speech and instruct the measurement unit (10) to carry out comparison using cross-correlation techniques between the signals stored in stores (8, 18) only when such characteristics are detected. This reduces the processing power required and raises the accuracy of the correlations. Parallel processing techniques allow echoes with longer delay periods to be detected. The results of the measurement may be used to generate an echo-cancellation signal (units 7, 17).
Patent CA-2204472-A1 (CA)
Inventor: BUGANE PRIMO
IPC: A45D2/12
Filed: 1997-05-05
Abstract: There is disclosed a hair curler constituted by a full body (10) of cylindrical shape and a net member (11) removably applicable to said body (10). At least the cylindrical body is made of a material capable of being heated by immersing same in a hot liquid and of slowly releasing the heat to a lock of hair (14) to which the hair curler is applied. on the cylindrical body (10) there is formed a protuberance (13) helically extending throughout the whole length of the cylindrical body (10).
Patent CA-2207953-A1 (CA)
Title: Process for the manufacture of acetonylbenzamides
Inventor: RAYLE HEATHER LYNNETTE
IPC: C07C237/30
Filed: 1997-06-16
Abstract: Novel routes for the preparation of acetonylbenzamides are provided by the reaction of an amine and acyl chloride. Novel routes to various intermediates used in the manufacture of acetonylbenzamides are also disclosed.
Patent CA-2209274-A1 (CA)
Title: Method and apparatus for applying a liquid coating with an improved spray nozzle
Inventor: SELESTAK DAVID M
IPC: H05K3/00
Filed: 1997-06-30
Abstract: Apparatus and methods for spray coating selected areas of a circuit board with a liquid coating material without coating regions of the circuit board to be left uncoated.  In one mode of operation, a bead of liquid coating material dispensed from an elongated nozzle tip is atomized by directing jets of air pressurized against the bead to form a conical, swirling spray pattern which is sprayed on selected areas of a circuit board.  In a second mode of operation, the non-atomized bead of liquid coating material dispensed through the elongated nozzle tip is applied on selected areas of the circuit board. In a third mode of operation, jets of pressurized air are directed against the bead of liquid coating material to create a soft swirl pattern, without atomizing the bead of coating materia.  In a second embodiment of the invention, the bead of liquid coating material is dispensed from a nozzle without the elongated nozzle tip.     In another embodiment of the invention, the nozzle is located closely adjacent a valve seat at the end of a liquid delivery passageway to minimize a residual volume of coating material in a volume between the valve seat and the nozzle so as to minimize drip and dribble upon startup.  In another embodiment of the invention, pressurized air is diverted to an exhaust port when operating in a non-pressure-assisted mode so as to minimize pressure spikes and consequent splatter when initiating a pressure-assisted mode of operation.  In another embodiment of the invention, pressurized air is supplied through a fluid damping system so as to minimize pressure spikes and consequent splatter when initiating a pressure-assisted mode of operation.
Patent CA-2212816-A1 (CA)
Inventor: KIEWIT DAVID A
IPC: H04N7/025
Filed: 1996-02-12
Abstract: Dans la présente invention, des données additionnelles sont modulées dans une fréquence porteuse qui est dans une portion de densité d'énergie basse d'une bande de fréquences d'un signal vidéo et la fréquence porteuse modulée (44) est combinée avec le signal vidéo (46) pour que la porteuse modulée soit dans une région vidéo active, ou encore dans une région de surbalayage du signal vidéo. Les données auxiliaires peuvent être étalées sur plusieurs fréquences et additionnées à la sortie d'un décodeur pour augmenter la lisibilité des données auxiliaires à la sortie du décodeur. On peut utiliser des paliers de fréquences pour ajouter les données auxiliaires à des fréquences choisies parmi une pluralité de fréquences dans la bande de fréquences du signal vidéo. Les données auxiliaires peuvent être réparties d'une manière hiérarchisée entre des segments séquentiels spécifiés de manière univoque et correspondant à de nombreux points de distribution du signal vidéo.
Patent CA-2214986-A1 (CA)
Title: Conveyor apparatus
Inventor: LANGENBECK KEITH A
IPC: B65G21/02
Filed: 1996-03-06
Abstract: An article transport conveyor (10), particularly for the food and beverage processing industry, includes interconnected conveyor frame sections (32, 34, 36) having two longitudinal beams (40) spaced apart from each other and connected by plural transverse angle or channel-shaped beams (42). The transverse beams (42) are mounted above the longitudinal beams (40) and support longitudinal parallel guide and support rails (74) for one or more endless conveyor flights. The transverse beams also support upstanding brackets (88) for parallel longitudinal guide rails for guiding articles being conveyed by the conveyor flights (20, 22) and spaced apart depending brackets for supporting return runs of the conveyor flights on return run support rollers. The frame sections are supported by spaced apart tubular column members (46) which are connected to the frame sections at respective adjacent ends thereof by connectors (44) having opposed arms interconnected by a web or opposed flanges which may be secured by threaded fasteners to the beam and column members of each section. The frame is mechanically uncomplicated and permits easy assembly and disassembly and access for cleaning and replacement or repair of conveyor chain links, the guide and support rails, and the return run rollers.
Patent CA-2217595-A1 (CA)
Title: An integrated rf switching cell built in cmos technology and utilizing a high voltage integrated circuit diode with a charge injecting node
Inventor: BUHLER STEVEN A
IPC: H01L29/861
Filed: 1997-10-07
Abstract: An integrated CMOS diode with an injection ring that enables construction of an integrated CMOS RF switch.  Construction techniques of using a diffused n-well resistor, parasitic capacitance and construction of the diode underneath a bonding input pad contribute to performance of the switch as well as saving space needed to construct the switch.
Patent CA-2219218-A1 (CA)
Title: Sump-vented controller mechanism for vacuum sewerage transport system
Inventor: GROOMS JOHN M
IPC: E03F3/02
Filed: 1996-04-26
Abstract: An apparatus for preventing waterlogging of the sensor and controller valves used to regulate operation of the vacuum interface valve (162) in a sump-vented vacuum sewerage system. A float valve (250) operates in accordance with the sewage level in a sump pit (154) and communicates atmospheric pressure to the sensor and controller valves while the sewage level is below a predetermined limit, but closes passage of sewage therethrough once the sewage level exceeds the predetermined limit. A pressure-relief valve may also be operatively connected to the float valve (250) that vents excessive hydrostatic pressure buildups in the sump pit (154) to the atmosphere.
Patent CA-2221652-A1 (CA)
Inventor: DURST FRANZ
IPC: B60R21/26
Filed: 1996-06-19
Abstract: A gas generator, in particular for inflating a passenger-protecting airbag, has a load container (3) in which is arranged a gas-building material (4), an electric igniting element (1) to ignite the gas-building material (4), a whirl chamber (25) designed as a centrifugal dust separator and a plunging pipe (18) that is arranged on the axis of symmetry (26) of the whirl chamber (25) and projects into the whirl chamber (25). The cleaned gas stream reaches an outflow chamber (27) in the airbag through said pipe (18). In order to improve the cleaning effect with a compact and simple device, load container (3), igniting element (1), whirl chamber (25), plunging pipe (18) and outflow chamber (27) are arranged on a common axis of symmetry (26) and the whirl chamber (25), plunging pipe (18) and outflow chamber (27) form a module that is coupled to the load container (3) and igniting element (1) by a connecting element (7).
Patent CA-2222115-A1 (CA)
Title: Helical turbine for power and propulsion systems
Inventor: GORLOV ALEXANDER M
IPC: F03D3/04
Filed: 1996-03-29
Abstract: A helical turbine assembly capable of providing high speed unidirectional rotation under a multidirectional ultra low-head fluid flow is disclosed. The assembly comprises an array of helical turbine units (304) arranged vertically or horizontally. Each turbine unit comprises a plurality of helical blades (302) having an airfoil profile. The modules may be mounted to rotatable shafts (322) supported by lightweight structures (316, 324) anchored by gui wires (318, 326) to the ground. The helical turbine (400) can also provide ship (406) propulsion by utilizing the power of ocean waves. In a further embodiment, a cylindrical distributor (206) is provided in the helical turbine to channel the fluid flow to the blades of the turbine. The helical turbine with distributor may be used to lift or lower a body (504) either being submerged into a fast stream or dragged in the fluid. The turbine may also include two or more rings of helical blades (220, 222).
Patent CA-2222969-A1 (CA)
Title: Radially expansible and articulated vessel scaffold
Inventor: KLEIN ENRIQUE J
IPC: A61F2/82
Filed: 1996-05-29
Abstract: A radially expansible lumenal prosthesis (10) comprises a plurality of body segments (12, 14) which are joined by universal articulation structures (16).  Each universal articulation structure (16) consists of a serpentine ring (20) and two pairs of beam members (22, 24). By joining adjacent body members (12, 14) to the serpentine ring (20) using beam members (22, 24), an articulated connection is provided while permitting radial expansion of all components.  Optionally, linear elements (46) within the body segment or segments (42) may be protected and/or anchored by loop structures (60) joined to or between longitudinal elements (46) of the terminal body segments.
Patent CA-2225396-A1 (CA)
Inventor: LERK COENRAAD
IPC: A61K9/72
Filed: 1996-06-03
Abstract: Pharmaceutical powder cartridge for powder inhalers for receiving a medicament depot for a large number of pharmaceutical powder doses, having an integrated metering device which comprises at least one metering cavity for receiving a predetermined quantity of a pharmaceutical powder, the integrated metering device being capable of being moved at least out of a filling position into an emptying position approximately transversely with respect to the flow direction of the pharmaceutical powder, and an inhaler for powdered medicaments, in which inhaler the medicament can be received by a patient by means of an air stream and which has a receptacle for such a pharmaceutical powder cartridge.
Patent CA-2225463-A1 (CA)
Title: Noise attenuating wall element
Inventor: BOOCK KLAUS
IPC: E04C2/24
Filed: 1997-12-19
Abstract: A wall element has a noise attenuating characteristic and is suitable for use as an aircraft cabin interior panel element that is mounted directly on the aircraft fuselage structure. The wall element includes a rigid lightweight composite panel having a core arranged between two cover layers, and an outer layer arranged adjacent and spaced away from one of the cover layers. The core and the cover layers of the composite panel are air permeable in a direction through the thickness of the panel, while the outer layer is non-air-permeable and is relatively soft and flexible. The outer layer is connected to the composite panel preferably only along the perimeter edge thereof. The non-permeable outer layer faces the aircraft cabin space, while the permeable composite panel is mounted on the fuselage structure. With this structure, acoustic vibrations of the fuselage, to which the wall element is attached, are attenuated and do not result in substantial noise radiation from the outer layer into the cabin.
Patent CA-2225558-A1 (CA)
Inventor: BOESCH MATHEW
IPC: B60C23/02
Filed: 1997-12-22
Abstract: A system and method that monitors four wheel sensors of an automotive vehicle to determined changes in the effective rolling radii of any wheel and a low pressure tire condition.  Certain vehicle operating conditions, such as excessive or very low speeds, braking, and turns, are determined from the sensor outputs and are used to prevent erroneous detection of changes in effective rolling radii.  Data from the sensors that is determined to be acceptable is accumulated over time as displacement values for each wheel.  When the displacement values exceed a predetermined value, a metric function is used to compare differences detected in accumulated displacement values for the front pair of wheels and for the rear pair of wheels.  If the difference between compared pairs of wheels is excessive, as compared with a predetermined baseline metric value, a low tire condition is detected. Further accumulation of instances where the metric indicates a detected condition, provides confidence that the condition actually exists and a warning is provided to the vehicle operator.  Resetting of the system and the baseline metric is performed when the low tire condition is corrected or when the tires are checked and properly inflated.
Patent CA-2225836-A1 (CA)
Title: Dispenser assembly for refrigerator and control method thereof
Inventor: KIM YONG SIK
IPC: F25D25/00
Filed: 1997-12-24
Abstract: A refrigerator dispenser assembly and a control method thereof by which a user can selectively drink drinks such as juice, barley-boiled water and the like including water through the dispenser. The assembly includes a water supply valve connected with a water supply apparatus installed outside a refrigerator for receiving a water filtered by a filter, a water container connected with one end of the water supply valve by a connection tube for storing a predetermined amount of water therein, a cooled drink container connected with the other end of the water supply valve for storing a predetermined amount of water therein, a first temperature detection sensor installed in an outer portion of the cooled drink container forsensing a temperature of the water filled in the cooled drink container, a second temperature detection sensor installed in an outer portion of the water container for sensing a temperature of the water filled in the water container, and a dispenser for receiving water from the water container or the cooled drink container.
Patent CA-2226319-A1 (CA)
Title: Weighted round-robin multiplexing of atm cells by updating weights with counter outputs
Inventor: SHIMONISHI HIDEYUKI
IPC: H04L47/6275
Filed: 1998-01-06
Abstract: In an ATM network node, cells of different service classes are stored in respective buffers and counters respectively associated with the buffers are initially loaded with full-count values respectively corresponding to the weight valeus of the service classes. The initial full-count values are updated respectively with the output values of the associated counters. Control circuitry sequentially interrogates the buffers and the counters in a round-robin fashion. If the output value of each interrogated counter is not decremented to a predetermined value, a cell is forwarded from the associated buffer and the counter is decremented by one. At the end of a round robin cycle, all of the counters are reloaded with the initial full-count values or the updated full-count values depending on the number of cells forwarded from each of the buffers.
Patent CA-2226701-A1 (CA)
Inventor: JESS JAMES L
IPC: A01C5/06
Filed: 1998-01-13
Abstract: A seed drill particularly adapted for contouring uneven ground and accommodating rocks, especially where depth of furrow and placement of seed against wet soil is critical, as in dry land farming. Each drill in a set of drills is a separate unit which is mounted on a vehicle. Each unit includes a split press wheel with an opener mounted within the wheel. The units can easily be individually mounted or adjusted on the vehicle for spacing and height. The opener has an articulating adjusting arm which allows easy adjustment to all preferred positions.
Patent CA-2231383-A1 (CA)
Title: Combined handle, needle head assembly and protective cover for use in a hair removal electrolysis apparatus
Inventor: GHEDIN ALPHONSE
IPC: A61B18/14
Filed: 1998-04-16
Abstract: The combination of a handle, a needle head assembly and a needle protective cover for use in a hair removal electrolysis apparatus. The handle has an electrically conductive plug connectable to an electric supply forming part of the electrolysis apparatus.  The needle head assembly has a head cap and a needle assembly. The head cap can externally fit onto the plug. The needle assembly has a connecting pin that can be electrically connected to the plug and thus to the electric supply, and a needle sized to be inserted into the hair follicle of a patient along side a hair shaft in the dermis. The protective cover is sized and shaped to snugly fit onto the head cap in order to cover the needle and thus to avoid inadvertent breaking of the needle during stockage or accidental stinging during handling. The head cap and the handle are detachably connectable to each other by screwing, clipping or a bayonet type mount. As a result, one may connect the head cap onto the handle without having to remove the protective cover which then acts as a handling device, and subsequently remove the needle head assembly from the handle with the same protective cover which then acts as a safety device.
Patent CA-2232701-A1 (CA)
Title: Method and apparatus for network transmission capacity enhancement for the telephone circuit switched network
Inventor: LIN WEI
IPC: H04J3/16
Filed: 1998-03-19
Abstract: Adjunct apparatus for increasing network transmission capacity provides a low-cost, efficient solution for increasing the network transmission capacity of the existing telephone circuit switched network, while keeping the current network equipment unchanged. A Local Switch Network (LSN) Adjunct (LSNA) and a Tandem/Toll Switch Network (TSN) Adjunct (TSNA) interface with standard network elements, such as switches and cross connect equipment. These network adjuncts, comprising a set of low-bit rate speech coders, a dynamic timeslot manager and other supporting functions, advantageously transmit to and receive from a T1/T3/OC3/E1 trunk. More than one channel of voice is carried on one 64 Kbps DS0 timeslot, while still maintaining the voice at toll quality. A sub-timeslot and sub-timeslot bundling are introduced in the standard T1 or E1 frame where each sub-timeslot is analogous to a single bit of the typical eight bit word to provide more than 24 or 30 voice channels respectively. Inband control information is generated for carrying over a T1 or E1 trunk, for example, for mapping sub-timeslot bundles to channels. Conventional out-of-band signaling is provided via SS-7 or other out-of-band signaling system.
Patent CA-2232932-A1 (CA)
Title: Automatically loaded swing bucket centrifuge
Inventor: AUCHINLECK GEOFFREY FLETCHER
IPC: G01N35/04
Filed: 1998-03-24
Abstract: An apparatus and method for loading and unloading of sample tubes contained in sample tube carriers from the buckets of a swing bucket centrifuge wherein the method includes the steps of lifting the buckets off the rotor of the centrifuge, pushing sample tubes contained in sample tube carriers out of the buckets, pushing new sample tubes contained in sample tube carriers into the buckets, and lowering the buckets back on to the rotor of the centrifuge. The buckets are suspended from axially aligned pins which fit into slots on opposite sides of the buckets and include openings in the sides of the buckets to admit sample tubes contained in sample tube carriers. Once the centrifuge rotor has moved a bucket into a defined position, a lifting mechanism raises the bucket from the centrifuge rotor to a position adjacent to a pushing mechanism which can push sample tubes contained in sample tube carriers out of the bucket and can push new sample tubes contained in sample tube carriers into the bucket.
Patent CA-2233676-A1 (CA)
Inventor: HARJU BERT
IPC: F15B15/22
Filed: 1995-10-02
Abstract: Cette invention concerne un procédé et un appareil permettant de commander le fonctionnement de toute sorte d'engins à moteur de type va-et-vient qui sont entraînés par un système pneumatique, hydraulique ou faisant appel à tout autre fluide sous pression, et ceci que l'engin ait un mode de fonctionnement rotatif ou axial. Le temps moteur actif est obtenu en utilisant la pleine puissance du fluide sous pression contre un piston (2) effectuant un mouvement de va-et-vient dans la chambre à air comprimé active (10, 12). Le renversement du sens de fonctionnement se fait en envoyant par alternance un fluide sous pression dans la chambre à air comprimé opposée (12, 10) de l'engin. La soupape comprend un champignon (6), lequel comporte plusieurs systèmes d'alimentation par canaux (7) permettant de mettre par alternance une des chambres de pression (10, 12) de l'engin de type va-et-vient entraîné par fluide (1, 2) sous une pression maximale, ainsi qu'un système (8) permettant d'établir une certaine contre-pression dans une chambre de pression étant inactive à ce moment, et, enfin, un système (9) d'évacuation de la pression d'une chambre de pression inactive de l'engin entraîné par fluide.
Patent CA-2235335-A1 (CA)
Title: New process for the preparation of phenylimidazolidine derivatives
Inventor: DELTHIL MICHEL
IPC: C07D233/72
Filed: 1996-11-14
Abstract: The invention relates to a process for the preparation of products having formula (I) wherein R¿1? and R¿2? represent particularly hydrogen, cyano, halogen or amino, R¿3? is particularly hydrogen or hydroxyl alkyl, R¿4? and R¿5? are particularly optionally substituted alkyl, X and Y are oxygen or sulfur, characterized in that a product having formula (A) is prepared; in formula (A), W is a halogen atom or a derivative of hydantoin which is subjected to various reactions in order to obtain the products of formula (I), all isomers and salts thereof.