baber/WOPTO huggingface dataset:
Patent CA-2003954-C (CA)
Inventor: CHUANQ JUSTIN C
IPC: H04L27/233
Filed: 1989-11-27
Granted: 1993-12-07
Abstract: ABSTRACT OF THE DISCLOSURE In order to correctly demodulate a received sequential burst of symbols in a time division multiplexed/time division multiple access (TDM/TDMA) portable radio digital telephony communications system, proper timing of the sampling time in each received symbol of the burst is necessary. In addition, in order to compensate for component drift, an estimate of the frequency offset between transmitting and receiving units is also required. A method and circuitry for estimating symbol timing and frequency offset is disclosed in which the IF radio signal is sampled and digitized at a sampling rate which is sixteen times the symbol rate. The digitized samples are processed to obtain phase values. A one symbol delay is introduced and differential phase values derived, a differential phase valve being derived for each of the sixteen sampling times per symbol. The differential values are collapsed into one quadrant in the phase plane and then expanded back to the full plane. For each of the sixteen sampling times, a separate vector sum is formed of the expanded and collapsed differential phase values over substantially the entire burst. Symbol timing is selected to be the particular one-of-the-sixteen sampling times at which the vector sum has the largest magnitude. Frequency offset is directly determined from the angle in the phase plane of that vector having the largest magnitude.
Patent CA-2005402-C (CA)
Title: Liquid compositions containing carboxylic esters
Inventor: JOLLEY SCOTT T
IPC: C10M171/00
Filed: 1989-12-13
Granted: 2004-02-03
Abstract: A liquid composition is described which comprises (A) a major amount of a fluorine containing hydrocarbon containing one or two carbon atoms, and (B) a minor amount of a soluble organic lubricant comprising at least one carboxylic ester compound characterized by the formulae RO(R1O)n C(O)R2      (I) and R3OC(O)R2            (II) wherein R is a hydrocarbyl group of at least 2 carbon atoms, R1 is a hydrocarbylene group, R2 is H, hydrocarbyl, -CF3, -R4CN, -R4-NO2 or R5OCH(R6)-, R3 is a -R4CF3, -R4CN or -R4NO2 group, provided that R3 may be a hydrocarbyl group when R2 is -R4CN, n is an integer from 1 to about 50, R4 is a hydrocarbylene group, R5 is H, a lower hydrocarbyl group or R7C(O)- where R7 is a hydrocarbyl group, and R6 is H or a lower hydrocarbyl group.      Liquid compositions also are described containing fluorine-containing hydrocarbons also containing other halogen such as chlorine. the liquid compositions are useful particularly as refrigeration liquids in refrigerators and air-conditioners including auto, home and industrial air-conditioners.
Patent CA-2013610-C (CA)
Title: Scheme for power conservation in fire alarm system
Inventor: SIROIS BRIAN D
IPC: G08B17/00
Filed: 1990-04-02
Granted: 1994-01-18
Abstract: ABSTRACT   Apparatus for conserving the alarm-state power supplied to a plurality of light emitting devices associated with respective terminal units in a fire alarm system or the like comprises a transmission line having a plurality of terminal units connected thereto.  Each of the terminal units has comparison means for determining whether a received address signal coincides with an identification address stored in the terminal unit, the comparison means producing an output signal responsive to coincidence.  A loop controller is connected to the transmission line for transmitting a plurality of address signals cyclically to the terminal units.  Means are provided for selecting a blinking mode of operation for the command signals such that respective groups of the light emitting devices are thereby intermittently illuminated at different discrete intervals, the means for selecting being operative such that the ON times for all of the devices, except the first, are the same, but the OFF times are varied in dependence on the number of light emitting devices to be supplied with power.
Patent CA-2015481-C (CA)
Title: Devices featuring silicone elastomers
Inventor: FILAS ROBERT WILLIAM
IPC: C03C25/10
Filed: 1990-04-26
Granted: 1996-05-14
Abstract: Devices are described in which certain crosslinked silicone polymers are incorporated. These polymers have various functions such as encapsulating agents, surface protective agents or agents to index match optical components (e.g. optical fiber, optical waveguide, etc.) to other optical devices or articles. The polymer is a vinyl-terminated dimethyldiphenylsiloxane copolymer crosslinked with tri-or tetrafunctional silanes in the presence of a platinum catalyst. The phenyl groupcontent of the crosslinked silicone copolymer is adjusted to change the index ofrefraction of the polymer to the optimum for the particular application contemplated. Polymer preparation procedures are described which yield good optical quality for the polymer as well as optimum physical and chemical properties.
Patent CA-2019682-C (CA)
Title: Electromagnetic clutch
Inventor: SHIMURA KEIICHI
IPC: F16D27/07
Filed: 1990-06-22
Granted: 1995-05-16
Abstract: An electromagnetic clutch includes a first rotatable member rotatably supported on a first bearing. The first rotatable member is provided with at least one annular groove along an outer surface thereof for receiving a belt rotatably connecting the first rotatable member to an external driving source. The first rotatable member further has an inner and outer cylindrical annular portions and a mag-netic axial end plate connecting the cylindrical annular portions at an axial one end. The magnetic axial end plate has a plurality of arcuate slits disposed on at least one circle. A plurality of remaining regions are located between each pair of adjacent slits. A second rotatable member is rotatably supported on a second bearing. An annular mag-netic member is supported on the second rotatable member so as to be capable of limited axial movement. The annular magnetic member faces the axial end plate of the first rotatable member with an axial gap therebetween. An electromagnet is associated with the first rotatable members and the annular magnetic member for attracting the other of the rotatable members and the annular magnetic mem-ber. The remaining regions are mechanically reinforced by increasing the thickness thereof.
Patent CA-2020049-C (CA)
Title: Epoxy prepreg
Inventor: WILKINSON PAUL
IPC: C08F299/04
Filed: 1990-06-28
Granted: 2001-07-10
Abstract: Resin composition, that can be used for manufacturing a prepreg, comprising a liquid epoxy resin, a monomer reactive with the epoxy resin and a hardening catalyst for the epoxy resin, an unsaturated polyester, a monomer reactive with the unsaturated polyester and a hardening catalyst for the unsaturated polyester, whereby the catalyst for the unsaturated polyester is a first catalyst that has a working range below 40°C and the catalyst for the epoxy resin is a second catalyst that has a working range above 40°C.
Patent CA-2020957-C (CA)
Title: Stent placement instrument
Inventor: BURTON JOHN H
IPC: A61F2/00
Filed: 1990-07-11
Granted: 1996-05-21
Abstract: An instrument for the deployment or retraction of a self-expanding stent in a body canal, which comprises an elongated tubular outer sleeve having disposed therein an elongated core which is movable relative to said sleeve and has a grip member formed at or near its distal end, which grip member is adapted to releasably hold a self-expanding stent within said outer sleeve.
Patent CA-2029688-C (CA)
Title: Method and apparatus for manufacturing sheets
Inventor: TOTSUKA AKIO
IPC: B26D1/08
Filed: 1990-11-09
Granted: 1995-05-23
Abstract: A method of manufacturing sheets which comprises the steps of feeding a sheet material in a predetermined polygonal shape, cutting collectively or substantially at one time a plurality of corner portions of the thus fed sheet material to obtain a sheet and then discharging the thus obtained sheet.  The apparatus comprises belt conveyors for sequentially feeding sheet materials in a predetermined polygonal shape, cutting dies for cutting collectively or substantially at one time the rear corner portions of the sheet material fed previously and the front corner portions of the sheet material fed subsequently, to obtain sheets, and belt conveyors for sequentially discharging the thus obtained sheets.  When a ruled line, that is, an elongate recess or the like for bending is needed, cutting of the corner portions and formation of the ruled line are effected collectively or substantially at one time.
Patent CA-2031175-C (CA)
Title: Fiber optic gyro system using sample and hold units for wide angle accomodation
Inventor: ISHIGAMI MOTOHIRO
IPC: G01P3/44
Filed: 1990-11-29
Granted: 1996-08-27
Abstract: In a digital phase ramp type fiber optic gyro in which a digital biasing signal produced by a biasing signal generator is added to a digital ramp signal and the added output is converted by a D/A converter to an analog signal and is applied to an optical phase modulator to thereby cancel a Sagnac phase difference of right-handed light and left-handed light propagating through a looped optical transmission line and provide +.pi./2 rad. and -.pi./2 rad. bias phase differences alternately with each other, a first error signal corresponding to the difference between the outputs of an opto-electric converter when the +.pi./2 rad. and -.pi./2 rad. phase differences are provided, respectively, is detected from the output of the opto-electric converter for converting interference light of the right-handed and the left-handed light into an electric signal, and the step value of the digital ramp signal is determined, based on the first error signal.  An accumulator accumulates the step value and, when the accumulated output exceeds 2m.pi. (where m is a positive integer), causes an overflow and a sign signal indicating the sign of the overflow.  The digital ramp signal, which is the accumulated output, is converted by a D/A converter to an analog signal, which is provided to the optical phase modulator.  A second error signal detector detects, as a second error signal, the difference between the outputs of the opto-electric converter at an operating point when the overflow occurs and at the immediately preceding operating point.  Based on the overflow sign signal and a sign signal indicating the sign of the biasing signal at the time of occurrence of the overflow, a negative feedback control circuit determines which of +(4m-1)x.pi./2, -(4m-1)x.pi./2, -(4m+1)x.pi./2 and +(4m+1)x.pi./2 the operating at the time of occurrence of the overflow corresponds to, and multiplies the second error signal by a positive or negative sign dependent on the result of determination to create a negative feedback error signal, thereby controlling the conversion gain of the D/A converter.
Patent CA-2036331-C (CA)
Inventor: SORIA RAYMOND
IPC: C04B41/88
Filed: 1991-02-14
Granted: 1997-05-13
Abstract: Dispositif à membrane comportant un bloc monoporeux en matériau fritté dont les extrémités ont leur porosité remplie d'un matériau fritté poreux, caractérisé par le fait que ce matériau fritté poreux comprend au moins deux types de grains, les grains au premier type dits "grains d'ossature" ayant un diamètre compris entre environ 1% et 20% du diamètre des pores dudit bloc, les grains du deuxième type dits "grains de finition" ayant un diamètre compris entre environ 0,2% et 20% de celui desdits grains d'ossature, et étant logés dans la porosité définie par lesdits grains d'ossature.
Patent CA-2045078-C (CA)
Title: Hydrodynamically modulated hull cell
Inventor: ABYS JOSEPH ANTHONY
IPC: C25D5/04
Filed: 1991-06-20
Granted: 1995-10-24
Abstract: Electrodeposition in surface finishing as well as in electroforming can be performed in a broad range of hydrodynamic conditions. In some instances, such as barrel plating, the liquid is barely moving relative to the work piece, while in jet plating the solution moves up to several meters per second relative to the piece to be plated. In such a wide range of hydrodynamic conditions, the selection of appropriate quality control (QC) methods for each particular operation is very critical. The QC method has to resemble the manufacturing operation in terms of the hydrodynamic conditions otherwise the quality control and the functional test for the bath performance have no meaning. Available Hull Cell systems have a limited capability in varying the liquid velocity. At best a relative velocity of up to 20 or perhaps 30 cm/sec can be achieved with uneven distribution.          The invention provides, in electroplating QC methods for manufacturing, better similarity and relevance between a Hull Cell QC test and aparticular plating operation. The invention is a simple and yet functional instrument which can be used to identify the performance of the plating bath prior to manufacturing operation under similar hydrodynamic conditions. The instrument isa rotating cylinder with a flexible Cu test panel attached to its surface. Like a Hull Cell, a range of current density can be simultaneously applied. Unlike a Hull Cell, the rotating speed of the cylinder and hence the solution agitation is practically unlimited The operator can identify the operating window for the particular process and apply them to the production line. The instrument has also demonstrated usefulness in developing proprietary electroplating chemistries.
Patent CA-2046592-C (CA)
Title: Calcification mitigation of bioprosthetic implants
Inventor: NASHEF AWS
IPC: A61L27/36
Filed: 1990-02-01
Granted: 2000-05-02
Abstract: Calcification resistant bioprosthetic implants are made from tanned biological materials, such as porcine heart valves, bovine pericardium, human dura mater or the like, which has been impregnated with a calcification-mitigating effective amount of a ferric and/or stannic salt, and having been treated with one or more diamines in combination with one or more activating factors. The impregnated biological materials and processes are particularly advantageous for the preparation of bioprosthetic heart valves. These implants have been found to be highly resistant to calcification in vivo.
Patent CA-2053243-C (CA)
Inventor: GAMMELGAARD KRESTEN
IPC: E03F7/00
Filed: 1990-04-26
Granted: 2000-06-27
Abstract: In an apparatus (2) for use in renovating tube systems, in particular sewer tubes of circular cross-section, and comprising a frame (4) on wheels (6), which frame is arranged to be moved inside a tube in such a way that the position of the apparatus in the tube is known, and a motor-driven tool (30) which is arranged for cutting away items protruding into the tube and/or for forming side openings in the tube wall or in a tube lining, the motor driven tool (30) is mounted on a carrier arm (28) protruding beyond an end part of a portion (14) of the apparatus which portion is journaled so as to be rotatable in relation to said frame (4) around a longitudinal axis, the carrier arm being pivotably connected, opposite of the tool, to the said portion (14) at a distance from the said end part thereof, and between the said end part of the rotatable portion (14) and the pivot axis (26) of the carrier arm an inflatable lifting member (32) is arranged inside the said rotatable portion (14), interposed between the rotatable portion (14) and the carrier arm (28) in such a way that the tool (30) on the latter can be moved diametrically within the tube, and a turning motor (20) is interposed between the frame (4) and the rotatable portion (14).
Patent CA-2053285-C (CA)
Title: Gearing system
Inventor: YOUNG NIELS O
IPC: F16D3/04
Filed: 1991-02-19
Granted: 1997-05-13
Abstract: A gearing system includes a pair of gear support plates (5, 10) arranged to rotate about parallel but offset axes (9, 14) with the plates extending parallel to each other in parallel radially extending planes. Each plate includes axially extending teeth (40, 45) having concave (43, 54) and convex (42, 52) opposed surfaces. The teeth are interdigitated axially such that various pairs of interdigitated teeth will be in cooperating surface contact. Rotation of each support plate about its own axis causes the teeth to orbit relative to each other and engage in a driving relationship in a smooth manner, with the convex portion of certain teeth en-gaging smoothly with the concave portion of adjacent teeth. In one embodiment, the gear teeth take the form of sections of lune shaped elements (49). In another embodiment, the gear teeth take the form of truncated involutes (40). In still a further embodi-ment the teeth are constituted by multi-faceted polygons (Fig. 7). The gearing system provides a 1:1 speed ratio and has applica-tion as an Oldham coupling or synchronizer for a scroll fluid device (1).
Patent CA-2053435-C (CA)
Title: In-line folder/gluer
Inventor: HAENEL MAX K
IPC: B65H35/10
Filed: 1991-10-15
Granted: 1995-06-27
Abstract: A system and method for automatically producing folded and sealed printed products from form sheets includes a high-speed printer interconnected with a conveyor which directs form sheets from the outfeed of the printer to the infeed of a folder gluer.  In an alternative embodiment for producing such products from a form web, the system and method includes a burster interconnected with a conveyor to separate the printed form web into form sheets.  Means for controlling the system include jam detection means for sensing and stopping all system components in the event of a form jam.  Means for communicating between the printer and conveyor align those elements without need for conventional hard wiring or mechanical fasteners.  Means for communicating between the burster and conveyor includes a simple cable and cable connections.
Patent CA-2055227-C (CA)
Title: Crusher for fine crushing of material
Inventor: DURINCK RENE
IPC: B02C15/16
Filed: 1991-11-08
Granted: 2000-02-01
Abstract: The crushing procedure consists of forming a layer of the material to be crushed on a circular track inside a crusher (10) and crushing it with a roller (30). The pressure exercised by the roller is between 10 and 40 MPa, and the material being crushed is moved transversely across the track as it is rolled. The transverse movement covers only a fraction of the width of the track, which is made in a ring located inside a coaxial cylinder (12) and rotating in the opposite direction to the roller. The outside of the cylinder is constantlylubricated as it rotates on a fixed support (16).
Patent CA-2057976-C (CA)
Title: Self aligning fluid connector
Inventor: POLDERVAART LEENDERT
IPC: F16L37/20
Filed: 1991-12-18
Granted: 2001-02-13
Abstract: A quick-acting coupling for the fluid-tight connection of two parts, each with sealing elements with sealing faces, is provided with at least one sealing face having flexible sealing means, as well as coupling means for connecting said party in such a way that they do not move relative to each other. In order to simplify the coupling and to reduce its costs, the sealing element of one part has a bevelled end and the sealing element of the other part has a correspondingly bevelled socket.      A quick-acting coupling assembly comprises various quick-acting couplings according to any of the preceding claims.
Patent CA-2059818-C (CA)
Title: Apparatus for storing articles
Inventor: HATOUCHI GOKICHI
IPC: B65G1/133
Filed: 1992-01-22
Granted: 1995-01-03
Abstract: ABSTRACT OF THE DISCLOSURE An article storing apparatus including rotary storing units having an elongate endless transport path formed on a long frame-shaped base.  Elongate, endless inner and outer support devices are provided on the base, with an endless clearance defined between the inner and outer support devices.  Below the inner support device are provided a travel element disposed in corresponding relation to the clearance and drive mechanism for driving the travel element.  A plurality of article support elements of disc shape are supported over the inner and outer support devices.  Individual article support elements are connected to the travel element by coupling members passing through the clearance.  A plurality of storing units are arranged in parallel, and corner portions of each storing unit at one end thereof are formed as an article receiving / discharging station.
Patent CA-2060720-C (CA)
Inventor: CAZAUX JEAN-LOUIS
IPC: H03H11/28
Filed: 1992-02-05
Granted: 1996-09-24
Abstract: Le déphaseur variable analogique est pour signaux hyperfréquence. Ce déphaseur comporte un circuit déphaseur proprement dit, comportant lui-même un transistor contreréactionné au moyen d'une réactance variable, et des circuits actifs d'adaptation d'entrée et de sortie.
Patent CA-2068664-C (CA)
Title: Drying process for increasing the filling power of tobacco material and apparatus for carrying out said process
Inventor: HIRSCH WERNER
IPC: A24B3/18
Filed: 1992-05-14
Granted: 1996-05-28
Abstract: In a drying process for increasing the filling power of tobacco material, the cut and moistened tobacco material is conveyed in a drying gas flow, dried within a tubular drying section and subsequently separated from the drying gas.  The drying gas has at a feed point into the drying section a temperature of at least 200°C and a flow velocity of at least 30 m/sec.  The flow velocity of the drying gas is reduced in the drying section.  The flow velocity of the drying gas at the charge point into the drying section is at the most 100 m/sec.  Within the drying section, to reduce the local heat transfer coefficient and the local mass transfer coefficient between the surface of the tobacco material and the surrounding drying gas, along with the reduction of the flow velocity of the drying gas, the flow velocity of the tobacco material is also reduced.  At the end of the drying section the drying gas has a flow velocity of at the most 15 m/sec and a temperature of at the most 130°C.
Patent CA-2069308-C (CA)
Title: A process for the production of paper
Inventor: CARLSON ULF RUNE
IPC: D21H21/10
Filed: 1990-10-24
Granted: 1996-01-30
Abstract: A process for the production of paper by forming and dewatering a suspension of cellulose containing fibers and optional fillers on a wire. Three components are added to the suspension, a cationic starch, a cationic polyacrylamide and a polymeric sili-cic acid, in order to improve retention and dewatering at paper production.
Patent CA-2076424-C (CA)
Title: Phosphoinositol-glycan-peptide with insulin-like action
Inventor: MUELLER GUENTER
IPC: C07K14/475
Filed: 1992-08-19
Granted: 2003-06-03
Abstract: Phosphoinositol-glycan-peptides obtainable by cleavage of adenosine 3',5'-cyclic monophosphate-binding protein, which contain glucosamine, galactose, mannose, inositol, phosphoric acid, ethanolamine and a peptide with the sequence Asn-Cys-Tyr, the preparation and use thereof for the treatment of diabetes mellitus and non-insulin-dependent diabetes are described.
Patent CA-2077490-C (CA)
Title: Integrity-testable wet-dry-reversible ultra-filtration membranes and method for testing same
Inventor: BILICH MOIRA H
IPC: B01D71/68
Filed: 1992-09-03
Granted: 1997-12-16
Abstract: The present invention provides an ultrafiltration/diafiltration polymeric membrane that is capable of excluding O. 1 µm diameter, monodisperse, latex particles with a rejection coefficient greater than 0. 998 and is capable of being fully dried without loss of such ultrafiltration properties and which after being wet/dry cycled at least once will have a KUF f low rate at 10 psi, using 1-butanol saturated with water as the wetting liquid and water saturated with 1-butanol as the displacing liquid at ambient temperature, below 50 cc/min per square foot of membrane area. The present invention also provides a method of filtering a fluid through the present inventive ultrafiltration membrane, as well as a process of preparing the present inventive ultrafiltration membrane .