baber/WOPTO huggingface dataset:
Patent CA-1294913-C (CA)
Title: Process for the removal of organic acids from freshly produced bitumen
Inventor: VAN LAAR HERMANUS G
IPC: C10G33/00
Filed: 1987-09-18
Granted: 1992-01-28
Abstract: A B S T R A C T        PROCESS FOR THE REMOVAL OF ORGANIC ACIDS     FROM FRESHLY PRODUCED BITUMEN       Process for removal of organic acids from bitumen comprising a)   Bitumen is diluted with low-density hydrocarbons. b)   A dilute solution of caustic soda in water is intimately mixed with the diluted bitumen. c)   A demulsifying chemical is added to weaken the interfacial layers between the bitumen phase and the aqueous phase. d)   Coalescence between the droplets of the dispersed aqueous phase is achieved in an electrostatic dehydration vessel. Separation between the bitumen and aqueous phase is effected in the vessel. e)   The acid-reduced bitumen is removed from the top of the coalescer and the aqueous organic salt solution from its bottom.
Patent CA-1288648-C (CA)
Title: Water supply apparatus
Inventor: JENNINGS NORMAN T
IPC: A01K31/17
Filed: 1987-09-30
Granted: 1991-09-10
Abstract: ABSTRACT    A water supply for caged birds includes a water outlet actuated by the birds for drinking purposes.  A V-shaped channel below the outlet serves to catch spillage adjacent the outlet and the upper marginal edges of the channel form a barrier to one side of the water outlet for the birds to approach the outlet with its neck substantially horizontal or inclined downwardly.
Patent CA-1283174-C (CA)
Title: Quad processor
Inventor: MAHER JOSEPH A
IPC: H01L21/677
Filed: 1987-10-05
Granted: 1991-04-16
Abstract: ABSTRACT        Plural plasma etching vessels and a wafer queuing station are arrayed with a wafer transfer arm in a controlled environment.          Wafer processing in each vessel is regulated by a state controller for processing a plurality of wafers from a single cassette, contained within the vacuum environment of the plural plasma etching vessels and wafer queuing station, to provide an orderly and efficient throughput of wafers for diverse or similar processing in the plural vessels.  In this manner a wafer can be processed as soon as a vessel becomes available.
Patent CA-1314698-C (CA)
Inventor: KOBAYASHI TAKATOSHI
IPC: A61L15/60
Filed: 1988-01-26
Granted: 1993-03-23
Abstract: Abstract of the Disclosure A liquid-absorbent composite comprises (a) a water-absorbent polymer, (b) a water-insoluble inorganic material and (c) a water-insoluble hydrophilic fibrous material at a weight ratio between (a), (b) and (c) in the range of 100 : 5-1200 : 5-1200.  It is very useful as the absorbent component for a sanitary napkin and a medical pad.
Patent CA-1280177-C (CA)
Title: Phase comparator insensitive to clock asymmetry
Inventor: MINUHIN VADIM B
IPC: G01R25/00
Filed: 1988-03-02
Granted: 1991-02-12
Abstract: PHASE COMPARATOR INSENSITIVE      TO CLOCK ASYMMETRY              ABSTRACT OF THE DISCLOSURE     A phase comparator generates a reference pulse equal in duration to one bit cell, and a variable pulse having a duration representative of the duration and time displacement of the leading edge of a data pulse from the center of the bit cell.  The phase comparator includes two D-type flip-flops arranged so that the variable pulse is initiated by the leading edge of the data pulse in the one bit cell, the reference pulse is initiated by the edge of the clock pulse at the end of the one bit cell, and both pulses are terminated by the edge of the clock pulse at the end of the next bit cell. Hence, only clock edges at the bounds of the bit cell affect the pulse durations and the apparatus is insensitive to clock asymmetry.  The charge pump associated with the comparator provides a pump down signal amplitude equal to 3/2 the pump up signal amplitude to correct the relationship that the variable pulse (which generates the pump up signal) is 3/2 the duration of the reference pulse (which generates the pump down signal) where the data pulse edge is nominally in the center of the bit cell.
Patent CA-1299935-C (CA)
Title: Process for adhesive metallization of plastics
Inventor: MAHLKOW HARTMUT
IPC: H05K3/38
Filed: 1988-03-11
Granted: 1992-05-05
Abstract: ABSTRACT OF THE DISCLOSURE         This invention relates to a process for adhesive metal-lization of plastics by pretreating the plastics and subsequent activating as well as chemical and, if necessary, galvanic metal deposition.  In the process the plastics are initially pretreated with an alkaline solution of oxidating agents and then with a metallic salt solution.
Patent CA-1317400-C (CA)
Title: Aqueous suspension of delaminated vermiculite
Inventor: LUKACS ALEXANDER III
IPC: C01B33/26
Filed: 1988-03-11
Granted: 1993-05-04
Abstract: AQUEOUS SUSPENSION OF DELAMINATED VERMICULITE                 Abstract of Disclosure Compositions comprising chemically delaminated vermiculite platelets ioniclly bonded to organo-substituted onium ions that can be polymerized by radical or ionic polymerization.          The platelets are prepared by swelling with water a vermiculite ore intercalated with sodium, lithium or onium cations, delaminating the ore by subjecting it to a shearing step and contacting the platelets so produced in aqueous suspension with organo-substituted onium ions.  The compositions can be shaped and cured into various water stable articles, such as films and sheets, without any post-treatment or incorporation of large quantities of organic materials that degrade the high-temperature properties of the articles.
Patent CA-1284341-C (CA)
Inventor: BOWEN JOHN G
IPC: A61L9/03
Filed: 1988-03-28
Granted: 1991-05-21
Abstract: ABSTRACT OF THE DISCLOSURE         An electrically energized vaporizing unit for medications, room deodorizers, room scenting compounds, room insecticides, and the like, is provided which is simple and inexpensive in its construction and which is compact in size.  The vaporizing unit has one or more compartments which are adapted to be filled with a liquid to be vaporized, or to hold a solid tablet saturated with a substance to be vaporized, the compartments being heated by positive thermal coefficient (PTC) electrical heating elements in conjunction with paraffin wax, the melting point of the wax being selected to correspond to the vaporizing temperature of the particular substance in the compartments.  The vaporizing unit is equipped with an electric plug which may be directly plugged into an electric receptacle to energize the PTC heating elements, and it does not require a switch or protective thermostats.
Patent CA-1318345-C (CA)
Title: Ignition device for a gas discharge lamp
Inventor: COCKRAM DAVID J
IPC: H05B41/04
Filed: 1988-04-19
Granted: 1993-05-25
Abstract: ABSTRACT            The invention provides an ignition device for a gas discharge  lamp.  The  device  comprises  a  voltage multiplier which is connected to an AC mains source . A  pulse  generator  is connected  to  the  voltage multiplier and produces periodic trigger pulses when the source voltage exceeds a predetermined threshold. The output of the pulse generator is applied to a resonant  network  including  a  step-up  transformer, which applies  high voltage ignition pulses to the lamp.  The  ignition  pulses  have  a  high  frequency relative to the mains frequency.
Patent CA-1296648-C (CA)
Title: Stamp formed exhaust muffler with conformal outer shell
Inventor: HARWOOD JON W
IPC: F01N1/02
Filed: 1988-04-27
Granted: 1992-03-03
Abstract: ABSTRACT OF THE DISCLOSURE         A stamp formed exhaust muffler for mounting on a vehi-cle is provided.  The muffler comprises a plurality of plates secured in juxtaposed relationship and stamp formed to define an array of tubes therebetween.  At least one external shell is secured to the internal plates to define at least one chamber which communicates with the array of tubes.  The external shell includes a conformal area which permits the muffler to conform to the shape of a structure on the vehicle.  The conformal area may be an area of generally arcuate concavity when viewed from the exterior of the muffler or may define an internal corner on the muffler.  Thus, a plane or line connecting two locations on the conformal area of the external shell will pass through the interference zone of a structure on the vehicle.
Patent CA-1299201-C (CA)
Inventor: DRIVON GILLES
IPC: C07C19/08
Filed: 1988-06-16
Granted: 1992-04-21
Abstract: The preparation of perfluoroalkyl bromides or bromo- perfluoroalkanes CnF2n+1 or insert-Br (n = 1 to 20). 
<??>Gaseous hydrogen bromide is reacted with a perfluoroalkanesulphonyl chloride CnF2n+1SO2Cl in the presence of a catalyst consisting of a tertiary amine or phosphine or of a quaternary ammonium or phosphonium salt at a temperature ranging from 80 to 200 DEG C.
Patent CA-1305614-C (CA)
Inventor: PEDERSEN HARRY
IPC: F16H48/29
Filed: 1988-10-18
Granted: 1992-07-28
Abstract: IMPROVED SIDE GEAR MOUNTING  FOR DIFFERENTIAL ASSEMBLY                     ABSTRACT      A differential gear assembly of the type including worm or helical-type gears mounted on crossed non-intersecting axes is provided wherein a pair of drive axles (12, 14) are received in bores (10) formed in the sides of a differential housing (4), and wherein axially aligned worm or side gears (18, 30) are coupled to each axle end for meshing engagement with torque transfer gears within said housing.  One of the side gears (30) is provided with an outwardly directed flange (36) which overlaps an inwardly directed flange (42) associated with the housing to maintain the end faces of the side gears (18, 30) out of contact with each other to preclude axial thrust forces developed in one side gear (30) from passing to the other (18) and to eliminate frictional forces at the interface of the side gears, thereby reducing differences in bias ratios associated with opposite directions of differentiation without significantly reducing the overall bias ratio of the assembly.
Patent CA-1311790-C (CA)
Inventor: ROBERTS JOHN J
IPC: F25D25/02
Filed: 1988-10-20
Granted: 1992-12-22
Abstract: PATENT - 9D-HR-17317-Roberts et al SHELF ASSEMBLY                            ABSTRACT A shelf assembly including a panel forming s shelf with a back wall, bottom wall ant side walls and having an elongated front shelf member and an end cap holding the shelf front member to each side wall of the shelf.  The end cap has a base wall with perpendicular integrally formed rear, side and front flanges and the base wall has at the front thereof projections for securing thereto one end of the shelf front member.  The end cap has a latching assembly secured to the rear flange and projecting rearwardly and receivable in an aperture in the panel side wall and includes two support legs each having a width slightly less than the distance between opposite edges of the side wall aperture.  A spring member is located between the legs and attached to both support legs at one end away from the rear flange and the distal end of the spring member is free.  The spring member has an inclined ramp portion extending from the attached end toward the rear flange and extends outside the diameter of the  aperture in the panel.  The spring member also has a panel engaging portion depending from the ramp portion in a direction of the leg at an included angle with the rear surface of the panel side wall of between 95 and 160 degrees.  With the spring member being depressed and inserted into the aperture the rear flange abuts one side of the panel and the panel engaging portion of the spring member is biased against only the rear surface of the panel side wall to secure the end cap to the panel and the end cap is removable therefrom by depressing the spring member ant withdrawing the end cap from the aperture.
Patent CA-1325556-C (CA)
Inventor: VETTER HEINZ
IPC: B05D1/30
Filed: 1988-11-25
Granted: 1993-12-28
Abstract: ABSTRACT OF THE DISCLOSURE         To coat a firm, closed surface having a peelable adhesive masking sheet or film thereon, the latter is lifted off the surface at one end and a low viscosity coating composition is poured into the wedge so formed.  As the masking sheet is pulled off further, the wedge moves along the surface, which is thus coated.   The coating composition in the wedge is replenished at the rate at which it is consumed.
Patent CA-1309146-C (CA)
Title: Magnetron with frequency control for power regulation
Inventor: SMITH PETER H
IPC: H02M5/458
Filed: 1988-12-15
Granted: 1992-10-20
Abstract: MAGNETRON WITH FREQUENCY CONTROL FOR POWER REGULATION              ABSTRACT OF THE DISCLOSURE       A microwave heating system uses a magnetron powered by a full wave full bridge inverter.  The magnetron has its power output stabilized against variations which might be caused by fluctuations in the AC input line. The inverter powers the magnetron by way of a power transformer having a primary and a secondary. The current is sensed in the primary in order to change the switching frequency of the inverter.  As the current in the primary will depend upon fluctuations in the AC input line voltage, sensing of the current in the primary may be used to sense variations in the voltage of the AC input line.  Alternately, current in the secondary of the power transformer may be sensed and used to detect variations in the AC input line voltage. In either case, the sensed variations in AC input line voltage are used to change the inverter frequency. Because the secondary includes a series resonant tuned circuit, changes in the difference between the inverter switching frequency and the resonant frequency of the tuned circuit may be used to counteract AC input line variations and stabilize the magnetron output power.
Patent CA-1320267-C (CA)
Title: Stored data error correction system
Inventor: HERTRICH FRIEDRICH R
IPC: G11B20/18
Filed: 1989-01-04
Granted: 1993-07-13
Abstract: Abstract of the Disclosure In a multi-track digital recording medium, data blocks on different tracks are algebraically combined to generate an error correction code (ECC) stored in an ECC block on one of the tracks.  Unrecoverable errors due to horizontal and vertical clustering of dropouts on magnetic tape, for example, are reduced by XOR-ing data blocks along a diagonal path traversing several tracks to form the ECC.
Patent CA-1325572-C (CA)
Title: Pneumatically actuated surgical stapler head
Inventor: PEDLICK JACK
IPC: A61B17/072
Filed: 1989-01-13
Granted: 1993-12-28
Abstract: PNEUMATICALLY ACTUATED SURGICAL STAPLER HEAD     Abstract of the Disclosure:     A driving mechanism is provided as a means to clamp and implant surgical staples pneumatically.  First, one pneumatic line propels a clamping piston to clamp the tissue and to propel a driving piston into position to be fired.  Then a second pneumatic line causes the driving piston to propel a driver which implants staples into the tissue.
Patent CA-1313748-C (CA)
Title: Method and apparatus for calcination
Inventor: WATKINS DAVID W
IPC: F27B15/00
Filed: 1989-02-07
Granted: 1993-02-23
Abstract: IMPROVEMENTS IN METHOD AND APPARATUS FOR CALCINATION                      ABSTRACT OF THE DISCLOSURE      In a method and apparatus for the heat treatment of gypsum or like heat material, in which the material is heated in a vessel by indirect heat exchange with hot gas produced by the fluidised combustion of a fuel, material is fed into a first fluidised bed of the material.    Partially treated material is removed from the lower region of the first bed and introduced with the assistance of compressed air into the upper region of a second fluidised bed. Treated material is removed from the second bed.   The beds of material are both fluidised by means of the introduction of the hot gas product of the fluidised combustion bed, further heating the beds.    The first bed may be operated at a lower temperature than the second bed, although both beds may receive substantially the same heat input.
Patent CA-1301535-C (CA)
Title: Compactor for recycling
Inventor: DISCEPOLO GEORGE W A
IPC: B30B15/30
Filed: 1989-03-29
Granted: 1992-05-26
Abstract: ABSTRACT OF THE DISCLOSURE          A compactor for use in compacting at  least  two separate classes of material comprises a charging box, a storage container and a packer ram. The charging box is internally, longitudinally divided into at least first and second charging chambers, each charging chamber having a charging opening and a discharging opening.  The storage container is internally divided into at least  first and second storage chambers and each chamber has a material receiving  opening  in  communication  with  a  respective discharging  opening  of  the  charging  box.  The  storage container  is releasably fixed relative  to  the  charging box.  The  packer  ram  has  at  least  first  and  second compacting  faces,  in  a  first  configuration  each  face forming  a portion  of  a  wall  of  a  respective  charging chamber opposite the discharging opening, the faces being mounted to a common actuator and movable from the first configuration   across   the charging   chambers    to simultaneously push material from the charging chambers through the discharging openings and into the respective storage chambers. Different classes or grades of material, such as recyclable and non-recyclable garbage, may thus be compacted and stored separately using a single compactor apparatus.
Patent CA-1307475-C (CA)
Title: Fluid strainer and flow corrector for fluid measurement device
Inventor: MCLAIN THOMAS N II
IPC: B01D29/11
Filed: 1989-04-10
Granted: 1992-09-15
Abstract: ABSTRACT      A  fluid  strainer and flow corrector for use with a fluid flow measurement  device,  such as a turbine-type flow meter, consists of a generally  conical  grid  of  ribs attached to an annular base flange. The  base  flange  of  the  strainer/flow corrector fits into a groove formed  on the inlet side of the housing of the flow meter and is held in  place  by  means  of  a  flexible  snap-ring.    The strainer/flow corrector  is  arranged  with  its apex upstream of the flange portion with  respect  to the direction of fluid flow through the inlet of the flow  meter.    The spacing between the ribs is chosen as to block the flow  of  debris  which  might be present in the fluid flowing through the  flow  meter.    The  spacing  between  the ribs is also chosen to provide  a  desired  velocity profile to the fluid.  The strainer/flow corrector  may be easily removed or replaced without disconnecting the flow meter from its associated pipework.
Patent CA-1310726-C (CA)
Title: Adaptive routing of network traffic
Inventor: KRISHNAN KOMANDUR R
IPC: H04M3/00
Filed: 1989-04-12
Granted: 1992-11-24
Abstract: Abstract of the Disclosure A process is disclosed for adaptively routing service requests through a network comprising nodes interconnected with links. The network is also arranged so that each node may communicate with each of the other nodes. At preselected time intervals, sets of routes through the network are generated in response to the network configuration and traffic information. Over predetermined periods, traffic data is measured to determine carried load and blocking for each link. Also, at predetermined time intervals, occupancy factors are computed as determined by the network configuration and in response to traffic information including measured traffic data. Each of the occupancy factors is derived from a nominal routing scheme in which a call blocked on a single route is treated as a lost call as in separable routing. Upon a request for service, the occupancy factors corresponding to the busy-idle status of the links are used to compute an occupancy value associated with each of the routes. Each route is converted to a candidate route based on traffic load at the initiation of the service request. The minimum occupancy value for each set of routes is selected as the candidate route for bridging a given node pair. If this minimum value is less than a preselected threshold, the traffic is routed over this candidate route, thereby satisfying the service request. Otherwise, the request is denied.
Patent CA-1304789-C (CA)
Inventor: PINEAU DIDIER M J M
IPC: C10B53/00
Filed: 1989-04-21
Granted: 1992-07-07
Abstract: - The torch (1) is of the nontransferred arc plasma type;
 - the nozzle (3) of the said torch (1) is pointed towards an orifice (8) so that the axis (4) of the said nozzle and the axis (6) of the said orifice are at least approximately coinciding; and
 - a flow (20) of the said waste is passed through the said orifice (8) so that it moves forward towards the said torch (1). 
<IMAGE>
Patent CA-1338362-C (CA)
Inventor: GOSSELIN CLAUDE
IPC: C04B41/63
Filed: 1989-04-27
Granted: 1996-05-28
Abstract: An aqueous soluton of acrylamide is mixed with an aqueous solution containing a polymerization trigger.  Firstly at least one of the solutions contains a color indicator having a given color in the solution based on acrylamide and a different color in the solution contained in the trigger, and whose color changeover zone corresponds to the optimum proportions of the reagents in solution.  Secondly, during mixing, the respective quantities of the two solutions are adjusted to occupy the changeover zone of the color indicator such that the mixture takes up the color corresponding to the color of the indicator in the solution based on acrylamide.  The mixture preferably contains acrylamide, methylenebisacrylamide, and triethanol-amide glycol, using ammonium persulfate as the trigger and using bromophenol blue as the color indicator, with the color thereof disapearring after polymerization.
Patent CA-1331937-C (CA)
Inventor: DAY JOHN P
IPC: C23C30/00
Filed: 1989-06-19
Granted: 1994-09-13
Abstract: Abstract of the Invention Thermite coatings are applied to molten metal filters and the environs, to produce longer lived filters that can be utilized in harsher environments.  The coatings employ exotheric, redox, and combination reactions to produce the beneficial effects.
Patent CA-1337605-C (CA)
Title: Low pressure noncryogenic processing for ethylene recovery
Inventor: MEHRA YUV R
IPC: B01D53/14
Filed: 1989-06-23
Granted: 1995-11-21
Abstract: A continuous process is disclosed for separating components of a hydrocarbon gas stream selected from the group consisting of hydrogen, nitrogen, methane, ethylene, ethane, higher saturated and unsaturated hydrocarbons, and mixtures thereof by countercurrently contacting the hydrocarbon gas stream with a physical solvent to produce an overhead stream which is rich in at least one of the components and a rich solvent bottoms stream which is rich in another of the components, and thereafter recovering the solvent bottoms stream and recycling it to the contacting step.
Patent CA-1294671-C (CA)
Title: Double-switched flyback power-converter
Inventor: BROWN ALEN E
IPC: H02M3/335
Filed: 1989-07-28
Granted: 1992-01-21
Abstract: DOUBLE-SWITCHED FLYBACK POWER-CONVERTER      ABSTRACT      A double-switched flyback power-converter has a primary winding of a power transformer connected between the output terminals of a high voltage DC power supply.  A first switch is connected between the positive terminal of the power supply and a first end of the primary winding. A second switch is connected between the negative terminal of the power supply and a second end of the primary winding.  During a primary conduction cycle, a current monitor senses the primary winding current and signals a control logic circuit at a predetermined current level. The control logic circuit turns off the second switch, forcing the power transformer in o a flyback cycle. During the flyback cycle, energy stored in the primary winding of the power transformer is coupled over to the secondary windings.  A major portion of the energy goes to a power output circuit, where it is rectified and filtered for output power use.  The remainder of the energy is transferred to a charge pumping cicuit at each switch. When the stored energy formed by the primary winding is depleted,  the charge pumping circuits pump charge into the switches.  The switches turn on, returning the double-switched flyback power converter to the primary conduction cycle.