baber/WOPTO huggingface dataset:
Patent CA-2023096-C (CA)
Title: Polyolefin polymerization catalyst and method of production and use
Inventor: MITCHELL KENT E
IPC: C08F4/642
Filed: 1990-08-10
Granted: 1996-08-20
Abstract: A catalyst useful in the polymerization of olefinic compounds and particularly 4-methyl-1-pentene is disclosed along with its method of preparation and use.  The catalyst is prepared by (a) forming a first component by reacting reactants comprising a magnesium dihalide, a phenol, and alkylbenzoate, and a titanium tetrahydrocarbyloxide; (b) reacting the first component with an organoaluminum halide compound to produce a solid product; and (c) then contacting the resulting solid product with an activating liquid comprising titanium tetrachloride and trichlorosilane in a confined zone under pressure of at least 70 psi.
Patent CA-2023397-C (CA)
Title: Voice guard digital voter for multi-site pst rf trunking system
Inventor: DERENGE CHARLES L
IPC: H04L1/24
Filed: 1990-08-16
Granted: 2001-06-12
Abstract: A voice Guard digital voter system for a mulit-site public service trunking (PST) digitally trunked RF communications system operates on the principle that it is highly likely that messages received during a system redundancy removal period are redundant messages. For a given RF channel, digital receiver is associated with each of multiple sites and receives digital messages reported to it by its associated sites. The multiple digital receivers axe connected to a digital selector via a service request line (FSL) and a serial data line (BSL).      Digital receivers calculate a bit error rate code (BERC) for each message they receive. All digital receivers receiving a version of a message are synchronized by the digital selector in response to a request to transmit by one of the digital receivers.      The digital receivers wait a delay time corresponding to the BERC they calculates and also responsive to a fixed slot assignment associated with each digital receiver. The digital receiver having the lowest calculated BERC begins first to transmit its message to the selector -- and all other receivers abort transmitting. Bus contentions between digital receivers calculating the same BERC by introducing the additional delay time corresponding to digital receiver fixed slot assignment.
Patent CA-2027091-C (CA)
Inventor: DESJOYAUX CATHERINE
IPC: E04H4/00
Filed: 1990-10-05
Granted: 2001-09-25
Abstract: Le dispositif est exécuté à partir d'un article textile (1), composé d'au moins une couche de matériau non tissé ayant des capacités de filtration, ledit article est conformé pour constituer une poche ou manchon ouvert à l'une de ses extrémités et fermé à son extrémité opposé, cet article étant monté à l'intérieur d'un support (2) ouvert en communication avec le liquide et relié à un système d'aspiration et de refoulement du liquidé pour soumettre ce dernier au pouvoir filtrant de l'article (1),
Patent CA-2028127-C (CA)
Title: Apparatus and method for continuously removing oxygen from fluid streams
Inventor: COPELAND JAMES C
IPC: C02F1/28
Filed: 1990-03-06
Granted: 2000-01-04
Abstract: The present invention is directed to a continuous flow method for removing oxygen from a fluid stream. The method comprises the steps of providing a fluid stream containing oxygen, causing the fluid stream to come in contact directly or indirectly, with a sufficient amount of oxygen scavenging cell membrane fragments having an electron transport system which reduces oxygen to water to catalyze the transformation of the oxygen contained in the fluid stream to water. The present invention is also directed to an apparatus for removing oxygen from a fluid stream, The apparatus is comprised of a flow through. reactor column (10) containing a sufficient amount of oxygen scavenging cell membrane fragments having an electron transport system which reduces oxygen to waer to catalyze the transformation of oxygen present in a fluid stream to water, wherein said fragments are contained therein by plugs (14, 18) which allow free contact between said fragments and the fluid stream flowing therethrough.
Patent CA-2030778-C (CA)
Title: Lubricant additives
Inventor: ASHJIAN HENRY
IPC: C10N60/00
Filed: 1990-04-24
Granted: 2000-11-28
Abstract: A lubricant additive composition and method for production is disclosed comprising the adduct of an olefinic oligomer and an enophile, the olefinic oligomer comprising the product of the oligomerization of C2 to C24 alpha-olefin feedstock, or mixtures.thereof, under oligomerization conditions in contact with a reduced valence state Group VIB metal catalyst on porous support. Maleic anhydride is a preferred enophile. The maleic anhydride adduct is reacted with polyamines such as tetraethylene pentamine to form the corresponding alkenyl bis-succinimide.
Patent CA-2033909-C (CA)
Title: Pressure cooker
Inventor: ISOGAI MAMORU
IPC: A47J27/088
Filed: 1991-01-10
Granted: 1995-07-18
Abstract: A pressure cooker and a process for making the same, wherein the pressure cooker includes a pres-sure container for accommodating food to be cooked, a lid for covering the container in an airtight manner, a pressure control device for adjusting the internal pressure in the container, wherein the container or the lid or both are partly or wholly made of a composite resin consisting essentially of polyphenylene sulfide resin and 30 wt% to 50 wt% glass fiber.
Patent CA-2037686-C (CA)
Title: High strength, heat resistant aluminum-based alloys
Inventor: KAWANISHI MAKOTO
IPC: C22C45/08
Filed: 1991-03-06
Granted: 1997-08-19
Abstract: High strength, heat resistant aluminum-based alloys have a composition consisting of the following general formula AlaMbXd or Ala'MbQcXd, wherein M is at least one metal element selected from the group consisting of Co, Ni, Cu, Zn and Ag; Q is at least one metal element selected from the group consisting of V, Cr, Mn and Fe; X is at least one metal element selected from the group consisting of Li, Mg, Si, Ca, Ti and Zr; and a, a', b, c and d are, in atomic percentages;80~a~94.5,80~a'~94,5~b~15,0.5~c~3and 0.5~d~10. In the above specified alloys, aluminum intermetallic compounds are finely dispersed throughout an aluminum matrix and, thereby, the mechanical properties, especially strength and heat resistance, are considerably improved. The aluminum-based alloys of the present invention are very useful as light-weight, high-strength materials, namely, high specific strength materials,both at room temperature and elevated temperatures.
Patent CA-2044229-C (CA)
Title: String vibration dampener for a tennis racquet
Inventor: DAVIS STEPHEN J
IPC: A63B59/00
Filed: 1991-06-10
Granted: 1994-09-06
Abstract: A vibration absorber for tennis racquet strings includes a thin, flexible strip with a relatively massive donut shape member at either end.  The device is weaved over and under the racquet main strings, so that the flexible strip contacts preferably between 4 and 6 of the center main strings, and the donut members engage, through a clamping groove, a pair of outlying strings.  The device provides a good vibration dampening on the outer part of the string area, for dampening off center hits, whereas the center main strings remain lively and resilient.
Patent CA-2045023-C (CA)
Title: Overvoltage protector assembly
Inventor: COSLEY MICHAEL R
IPC: H01R13/66
Filed: 1991-06-19
Granted: 1999-08-24
Abstract: An overvoltage protector assembly and a method of attaching a terminal member through a dielectric body. The assembly has a dielectric body, and line terminal members extending through the body into a chamber within. The terminal members each have a shaft passing through the body and first and second radially extending, opposing abutment-surfaces which engage inner and outer surfaces of the body.      The body is compressed between the opposing abutment surfaces in an axial direction of the shaft to deform the body inwards to sealingly engage the terminal member between the opposing abutment surfaces. The body is formed with axial projections around apertures receiving the line terminals. so that compressing the body results in displacement of. material of the body to form annular projections sealingly engaging around the shaft between the abutment surfaces.      Peripheral surfaces of the terminal member are cooperable with the body to prevent relative rotation of the body and the terminal member. The line terminal members are connected to a grounding terminal within the chamber via an overvoltage protection device.
Patent CA-2047635-C (CA)
Title: Two-component aqueous polyurethane dispersions
Inventor: POTTER TERRY A
IPC: C09D175/12
Filed: 1991-07-23
Granted: 2003-09-30
Abstract: The present invention relates to a two-component, aqueous polyurethane coating composition which may be cured at ambient temperature and which contains I) a first component based on an aqueously dispersed poly-urethane wherein the polyurethane has a) an average hydroxy functionality of at least 1.8 b) a total content of urethane and urea groups, calculated as -NH-C-O-, of 9 to 20% by weight, based on the weight of the polyurethane, and c) sufficient chemically incorporated anionic groups and d) ethylene oxide units incorporated within terminal and/or lateral polyether chains to maintain the polyurethane stably dispersed in water, and II) a second component based on a water dispersible polyisocyanate wherein the polyisocyanate has a) an isocyanate content of 2 to 30% by weight, based on the weight of the polyisocyanate, b) an average functionality of at least 1.8 and c) sufficient chemically incorporated anionic groups and d) ethylene oxide units incorporated within terminal and/or lateral polyether chains to maintain the polyisocyanate stably dispersed in water, and components I and II are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to hydroxyl groups of 0.8:1 to 6:1.      The present invention is also directed to the coatings prepared from these coating compositions.
Patent CA-2048098-C (CA)
Title: Lift-off mechanism for an upright vacuum cleaner
Inventor: MENDES DA COSTA PHILIP
IPC: A47L5/34
Filed: 1991-07-29
Granted: 1994-10-18
Abstract: A vacuum cleaner comprises a base which has a surface cleaning nozzle and a wheel housing which is moveable between a raised position and a lowered position. Wheel means are rotatably mounted on the wheel housing. First abutment means is attached to said wheel housing at a fixed position relative to said wheel means. A handle structure is pivotally mounted on the base and moveable between an upper storage position and a lower operating position. Second abutment means, which is attached to the handle structure, is positioned and adapted to engage the first handle means. Spring means is provided which bias the wheel housing to its raised position. As the handle structure is pivoted from the lower operating position to the upper storage position,  the  first abutment means engages  the  second  abutment  means  moving  said wheel housing to its lower position and consequently raising said nozzle.
Patent CA-2058794-C (CA)
Title: Automated optical mdf system
Inventor: KANAI TSUNEO
IPC: G02B26/02
Filed: 1992-01-06
Granted: 1996-06-18
Abstract: In  an  optical  MDF  (main  distributing  frame)  for interconnecting external  subscriber optical lines  (122) with  office  optical  lines   (131)   through  jumpering operation, a matrix waveguide  (128,  129,  130) having a plurality of crosspoints coupled with external lines and office lines is used. The matrix waveguide has a groove (235 in Fig.4A) at each crosspoint so that said crosspoint is switched ON or OFF depending upon whether said groove is filled with matching oil or not, so that one of the external lines is connected to the selected office line. Said matching oil has the same refractive index as that of waveguides.  Each  crosspoint  groove  is  coupled  with  a respective oil  pool  (236), which supplies matching oil which has essentially the same refractive index as that of a waveguide to said groove. Switching at a crosspoint is carried out in a manner that a light signal in a waveguide goes  straight through the crosspoint when a groove is filled with matching oil, and the light signal changes its direction at the crosspoint through total internal reflection when the groove is empty. A jumpering operation to connect or disconnect a crosspoint is  carried out by a  robot (133), which fills or pulls out matching oil in the oil pool at the designated coordinates. Each external line is branched by using an optical directional coupler (237) for test purposes, and one of the branch lines subject to test is selected by using a similar lxN type matrix waveguide.
Patent CA-2065301-C (CA)
Title: Crystalline mixture solid containing maltitol and a process for preparing it
Inventor: KAWASHIMA SHIGERU
IPC: C07H15/04
Filed: 1991-05-23
Granted: 2001-10-16
Abstract: The crystalline mixture solid containing maltitol of the present invention has a crushed and relatively tight crystal structure which can be observed at 1,000 magnifications by a scanning electron microscope, an apparent specific gravity in the range of 0.650 - 0.750, an oil absorptivity of the powdered crystalline mixture solid containing maltitol having a particle size from 50 mesh to 20 mesh in the range of 7.0% -17%, in other words, is relatively heavy in apparent specific gravity and low in oil absorptivity, and the crystalline mixture solid containing maltitol is prepared by continuously supplying an aqueous solution of maltitol to an extruder provided with elongated cooling and kneading zones, cooling and kneading it in the presence of seed crystals to form a maltitol magma, and continuously extruded from a nozzle.
Patent CA-2066484-C (CA)
Title: Wireless input system for computer
Inventor: SUZUKI TORU
IPC: G06F3/042
Filed: 1992-04-21
Granted: 1996-07-23
Abstract: A cylindrical frame is provided with an incident angle detecting section for detecting an incident angle of the light from a source of light capable of transmitting pulses and a focus detecting section having a movable lens constructed so that it detects an incident light from the source of light to control the focus position of the incident light.   On the basis of the incident angle detected by the incident angle detecting section, the movable lens is caused to be directed to the source of light.  Furthermore, by the focus detecting section, the focus position of light is controlled to detect the position of the movable lens.   A distance from the position to the source of light is calculated.
Patent CA-2068634-C (CA)
Inventor: ONODERA AKIRA
IPC: G01R19/04
Filed: 1992-05-13
Granted: 1995-10-17
Abstract: The provision of a peak detection circuit which can accurately detect peaks  even  if  a  noise  component  is included in the input signal.  A peak detection circuit, comprising:  a differentiating circuit which produces a differentiated signal of an input signal,  a peak hold circuit which produces a peak value envelope of an output of  said  differentiating  circuit,  a  first  comparator which compares an output of said differentiating circuit and a reference signal formed on the basis of an output of said peak hold circuit, and detects when said input signal  falls  below  said  reference  signal,  a  second comparator  which  detects  a  portion  which  detects  a portion which exceeds an output of said differentiating circuit,  and a flip-flop for producing a signal which rises  in  accordance  with  an  output  of  said  second comparator and falls in accordance with an output of said first comparator thereby to form a signal representing a peak by the rise of an output of said flip-flop.
Patent CA-2076264-C (CA)
Inventor: SCHEIDER ALFRED F
IPC: B24D13/10
Filed: 1992-08-17
Granted: 2003-09-02
Abstract: A honing tool characterized by an elongated rectangular cup element or holder having a bottom interior surface, a bundle of closely packed relatively short discrete generally parallel filaments secured in the holder, and a thin layer of instant adhesive securing substantially all of the filaments at one end face of the bundle to the bottom interior surface of the holder. To make such a honing tool, a measured bundle of uniformly closely packed nonwoven, generally parallel discrete filaments is formed. A holder is supported and a measured amount of liquid adhesive is placed in the bottom interior of the holder so that a thin layer of such adhesive completely covers the bottom of the interior of the holder. The bundle is then promptly driven into the holder so that all of the filaments at one end of the bundle are in contact with the adhesive prior to the curing of the adhesive. The adhesive is then cured whereby the one end face of the bundle is secured to the bottom interior of the holder.
Patent CA-2078316-C (CA)
Title: Optical equalizer
Inventor: OZEKI TAKESHI
IPC: H04B10/18
Filed: 1992-09-15
Granted: 1998-06-16
Abstract: When a light wave passes through an optical fiber used as an optical communication line, different time delays are introduced in its frequency components according to the delay characteristic of the optical fiber, limiting the usable bandwidth.  An optical equalizer according to the present invention comprises a multi-stage connection of one or more unit optical circuit elements for introducing time delays opposite to the delay characteristic of the optical fiber in frequency components in the neighborhood of the transmission band used.  The optical equalizer is placed at the input end of a transmission line and equalizes time delays of the frequency components passing through the transmission line, thereby expanding the usable bandwidth.
Patent CA-2078609-C (CA)
Title: Upgrade method and system
Inventor: FUJISE HIROSHI
IPC: G06F13/00
Filed: 1992-09-18
Granted: 1997-10-07
Abstract: The present invention relates to an upgrade method and system.  The upgrade technique is used in a multiprocessor system.  The processor to be upgraded investigates resources under control by itself before deciding any of the resources to be moved and/or duplicated.  The processor decides any of the processors to which the movement and/or the duplication of any of the resources is destined.  The resource is moved or duplicated and the upgrade of the processor to upgraded is executed.  As a result of this system the computer system can be upgraded while a user continues to work on the computer.
Patent CA-2078896-C (CA)
Title: Adjustable angle foil for paper making machine with rigid foil body and cam actuation means
Inventor: MEJDELL DANIEL E
IPC: D21F1/52
Filed: 1992-09-23
Granted: 1996-01-30
Abstract: An adjustable angle foil apparatus for a paper making machine is described in which a rigid foil member is pivoted by a cam actuated adjustment mechanism to change the foil angle.  The cam actuator includes at least a rear set of cam slots and cam follower pins connecting a foil support member to a foil mounting base member to pivot support member in response to longitudinal movement thereof for adjustment of the foil angle.  A rigid foil body made of foil segments of ceramic or other hard, wear resistant material, are attached by tongue and groove connections and bonding adhesive to the foil support member.  The cam actuated adjustment mechanism pivots such support member to adjust the foil angle without bending the foil.  In one embodiment a front set of cam slots and cam follower pins is provided to maintain the height of the leading edge of the foil substantially constant at different foil angles.  In a second embodiment the ends of the pins are connected to cam slide rods which extend across the pins and fit into the cam slots.  In a third embodiment, the front set of cam slots and pins is replaced by a pivot rod attached to the front of the mounting base member about which the foil and foil support member pivot in response to the rear cam actuator adjustment of the foil angle.
Patent CA-2081071-C (CA)
Title: Continuous antimony pentoxide production
Inventor: FENTRESS DENTON C
IPC: C01G30/00
Filed: 1992-10-21
Granted: 1998-09-29
Abstract: This invention concerns an improved means of oxidizing aqueous dispersions of antimony trioxide to colloidal hydrous antimony pentoxide in a continuous flow system.  The oxidant is hydrogen peroxide and the continuous flow system nominally consists of a static mixer and a tubular reactor.
Patent CA-2082717-C (CA)
Title: Register control device used within a rotary printing machine
Inventor: MONNEY PATRICK
IPC: B41J21/16
Filed: 1992-11-12
Granted: 1997-02-18
Abstract: Disclosed is a register control device for use in a rotary printing machine.  The device has a head which scans register marks printed on a web, and which comprises a row of discrete photosensitive elements arranged crosswise to the travel-ling direction of the web and in a plane situated above and parallel to the web, the head having in the same plane a linear video bar situated parallelly to the row of photosensitive elements.          Moreover, this device includes a micro-processor which selects the photosensitive element to be used according to the temporary side-wise displacement of the web and controls the scanning operations of the linear video bar.  The scanning head may also comprise a second row of discrete photosensitive elements arranged parallelly between the first row of discrete photosensitive elements and the linear video bar.
Patent CA-2083685-C (CA)
Title: Roller, especially for application in a printing machine
Inventor: VONK LEO
IPC: B41F13/02
Filed: 1992-11-24
Granted: 2000-01-25
Abstract: The invention relates to a roller such as for application in the inking machinery of a printing machine, comprising a central shaft to be journalled in the printing machine and a shell extending concentrically around said shaft. Essentially the shell and shaft are made of plastic material, whereas at both ends of the shaft respective metal jackets are provided extending up to the respective frontal ends of the shaft. Preferably the frontal ends of the shell too are provided with metal jacket-shaped parts.
Patent CA-2089254-C (CA)
Title: Low voltage central vacuum control handle with air flow sensor
Inventor: RADABAUGH KURTIS R
IPC: A47L5/38
Filed: 1993-02-10
Granted: 2000-09-26
Abstract: A remote control system for actuating a central vacuum system from a remote location such as a vacuum cleaning hose handle that includes an air flow sensor. In the preferred embodiment, a small, lightweight vacuum sensor and a sensor amplifier that is connected to an LED bar graph meter and a comparitor circuit are installed in the remote control hose handle. A low voltage power signal is transmitted through the vacuum cleaner hose and to the remote control handle for the purpose of providing electrical current to power the central vacuum system. The vacuum sensor will enable the consumer to instantly know if the vacuum is producing enough air flow to get proper cleanability. The sensor will also notify the consumer if the vacuum cleaner has a full bag or a problem at the vacuum unit, such as a clogged screen. The low voltage control signal travels from the remote control handle through the power supply wires running the length of the vacuum hose, which are preferably covered by a sleeve, such as of cloth or plastic, then into the vacuum cleaning motor. An electrical relay located near or inside the central vacuum cleaning system receives the control signal from the hose wiring and processes it to start or stop a central vacuum system main motor.
Patent CA-2089791-C (CA)
Inventor: BRADY MICHAEL J
IPC: H01L23/495
Filed: 1993-02-18
Granted: 1998-11-24
Abstract: Silicon and germanium containing materials are used as a surface of conductors in electronic devices. Solder can be fluxlessly bonded and wires can be wire bonded to these surfaces. These materials are used as a surface coating for lead frames for packaging integrated circuit chips. These materials can be decal transferred onto conductor surfaces or electrolessly or electrolytically disposed thereon.