baber/WOPTO huggingface dataset:
Patent CA-2001813-C (CA)
Inventor: SCHNELL KENNETH R
IPC: H02G3/16
Filed: 1989-10-30
Granted: 1999-07-20
Abstract: An electrical wiring box assembly includes a non-metallic electrical box, a metallic grounding plate and a conducting clip.   The  electrical box  includes  a pair of mounting lugs for releasably fastening a wiring device.  The grounding plate includes a central portion having a down-wardly extending coupling flange frictionally retained in a slot formed in one of the box mounting lugs.  The grounding plate further includes a pair of connecting portions ex-tending downwardly from the central portion, each having an extending outwardly leg.   The conducting clip includes a flat body portion and a raised portion.  The flat body por-tion has a slot for receiving the coupling flange of the grounding plate and a self tapping hole for receiving a mounting screw.  The raised portion includes a hole and a plurality of tabs formed by radially extending slits.  The hole is slightly smaller than the diameter of the mounting screw.  Upon passage of the mounting screw through the hole with the slits, the tabs are deflected downwardly, making firm electrical contact with the mounting screw.
Patent CA-2004873-C (CA)
Title: Method and apparatus for winding belt-shaped member
Inventor: TOYA HIROKI
IPC: B29D30/30
Filed: 1989-12-07
Granted: 1994-07-26
Abstract: A method of winding a belt-shaped member is used in winding a tire member around a forming drum.          A position of a leading end of a tire member is detected to obtain a shifted distance of the leading end relative to the forming drum.  The leading end is then transferred to the forming drum, while the leading end is being moved in a width direction to make zero the shifted distance.  The leading end is pressed against the forming drum, while the leading end is brought into coincidence with a reference position of the forming drum. The forming drum is then rotated during which the tire member is suppled onto the forming drum.          A position of a trailing end of the tire member is detected to obtain a shifted distance of the trailing end relative to the reference position of the forming drum.  The trailing end is the supplied onto the rotating forming drum, while the trailing end is moved in a width direction to make zero the shifted distance of the trailing end.  In this manner the tire member is completely wound about the forming drum with the leading end being snugly coincident with the trailing end.
Patent CA-2020345-C (CA)
Title: Encapsulated liquid crystal apparatus having low off-axis haze and operable by a sine - wave power source
Inventor: DRZAIC PAUL
IPC: G02F1/1334
Filed: 1990-07-03
Granted: 2000-10-10
Abstract: A liquid crystal apparatus including a low birefringence encapsulated liquid crystal material in a containment medium. The difference between the ordinary index of refraction and extraordinary index of refraction of the liquid crystal material is between about .050 and .115. The index of refraction of the containment is greater than the ordinary index of refraction of the liquid crystal material. The liquid crystal apparatus provides low haze at off-axis viewing angles and permits efficient sine-wave power operation.
Patent CA-2024168-C (CA)
Title: Interlocking building blocks and walls constructed thereby
Inventor: PARDO JORGE
IPC: E04C1/39
Filed: 1990-08-28
Granted: 1995-08-15
Abstract: Interfitting modular construction units include alternat-ing plateaus and recesses which interfit with one another to form walls without mortar.  Drainage grooves are defined in the units, bevels are provided on the perimeter of the front and back to give a brickface appearance to the wall, and shear notches are defined just behind the front and back,  and the units are devoid of surfaces  facing  toward  one  side.    Special  corner units  are provided, along with cap units having transverse bores.  Retaining walls and fence walls employing the units at integral footings defined by the units and drainage passages defined by cooperating drainage grooves.  Piers can be provided to permit the construction of higher walls.
Patent CA-2024863-C (CA)
Title: The manufacture of pellets of xanthine derivatives
Inventor: PICH CLAUS HINRICH
IPC: A61K9/32
Filed: 1990-09-07
Granted: 2001-11-27
Abstract: a process for the manufacture of pellets which are composed of xanthine derivatives and are predominantly spherical, have a particle sire in the range from 0.3 to 4 mm and have a bulk density above 0.5 g/cm3 by reacting the appropriate xanthine derivative with water or a water/alcohol mixture, entails anhydrous powdered xanthine derivative with an average particle sire of from 20 to 200 µm being suspended by stirring at from 40 to 70°C in a nonsolvent which is immiscible with water and has a boiling point in the range from 60 to 160°C, then adding from 10 to 40 % by weight, based on the anhydrous xanthine derivative, of water or a water/ alcohol mixture and subsequently allowing to cool to room temperature at from 5 to 20°C per hour, it being possible to reduce the stirring speed after agglomeration to about 1/3 to 2/3 of the original, and the pellets being separa-ted from the liquid and dried, the pellets being used, possibly with a delayed release coating, as active compound in a drug.
Patent CA-2025073-C (CA)
Title: Process for producing sodium silicates
Inventor: SCHIMMEL GUENTHER DR
IPC: B02C17/00
Filed: 1990-09-11
Granted: 1995-07-18
Abstract: For producing amorphous sodium silicates having a water content of 0.3 to 6% by weight and an SiO2/Na2O molar ratio of (1.9 to 2.8) : 1 from a waterglass solution containing at least 20% by weight of solids, the water-glass solution is obtained by reacting quartz sand with sodium hydroxide solution at an SiO2/Na2O molar ratio of (2.0 to 2.8) : 1 at temperatures of 180 to 240°C and pressures of 10 to 30 bar. This waterglass solution is treated in a spray-drying zone with hot air at 200 to 300°C for a residence time of 10 to 20 seconds and at a temperature of the exit gas leaving the spray-drying zone of 90 to 130°C, to form a pulverulent amorphous sodium silicate having a water content (determined as the loss on ignition at 700°C) of 15 to 23% by weight and a bulk density of more than 300 g/l. The pulverulent sodium silicate is introduced into an obliquely arranged rotary kiln fitted with devices for moving solids and treated therein with flue gas in countercurrent at temperatures from 250 up to 500°C for 1 to 60 minutes. The rotary kiln is here insulated in such a way that its outside wall temperature is less than 60°C. Finally, the amorphous sodium silicate emerging from the rotary kiln is com-minuted by means of a mechanical crusher to grain sizes of 0.1 to 12 mm.
Patent CA-2032924-C (CA)
Title: Polymer compositions and absorbent fibers produced therefrom
Inventor: LE-KHAC BI
IPC: D01F6/36
Filed: 1990-12-21
Granted: 2002-05-14
Abstract: Aqueous, uncured but curable, polymer compositions which are stable at room temperature and possess excellent shelf life in uncured form are disclosed. The uncured polymer compositions can be made into fibers using conventional fiber forming processes and cured to produce absorbent fibers capable of absorbing at least 60 times their weight of brine.
Patent CA-2033199-C (CA)
Title: Central suction-cleaning installation with water flushing and double rinsing
Inventor: BARSACQ GABRIEL
IPC: A47L9/20
Filed: 1990-06-12
Granted: 1995-07-25
Abstract: The invention relates to a central suction-cleaning installation with water flushing and double rinsing. This installation is characterized in that it contains water flush generating means consisting of a water intake at the bottom end (5) of the chamber (7) via a duct (25) linked to a source of pressurized water (20) and in which there are interposed an electrovalve (26) and a needle valve tap (27) controlled by a float (28) which is arranged inside the chamber, above a reserve of water (13), in that the chamber is further provided with a double rinsing system containing, on the one hand, a diffuser ring (31) directed at said reserve of water and, on the other, a spray diffuser (32) of a dust filter (35) placed between the suction plant (34) and said diffuser ring (31), whereby the ring and spray diffusers are linked to said source of pressurized water via a duct (219) which is provided with an electrovalve (30). Applications in central suction-cleaning.
Patent CA-2037527-C (CA)
Title: Error correction system capable of correcting an error in a packet header by the use of a reed-solomon code
Inventor: OKUYAMA HIDEKI
IPC: H04L1/00
Filed: 1991-03-04
Granted: 1999-05-25
Abstract: In an error correcting system for use in transmitting a packet from a transmitter to a receiver a packet header is preceded by an input signal and is formed by a Reed-Solomon code in the transmitter by adding an error correcting code to a header information signal.  In the receiver, a plurality of syndromes are calculated by a syndrome calculator in response to the packet header to detect whether or not at least one error is included in the packet header.  On detection of at least one error, an error correction circuit is energized in accordance with a program to locate and to correct the at least one error on the basis of procedure determined for correction of the Reed-Solomon code and may be structured by a plurality of hardware circuits.
Patent CA-2039837-C (CA)
Title: Clamping device for crane or the like
Inventor: PAQUES JOSEPH-JEAN
IPC: B66C23/94
Filed: 1991-04-04
Granted: 1997-04-01
Abstract: The disclosure herein describes a clamping device to be mounted to an element of a crane and which provides  contact  surfaces  for  limit  switches  that maintain the movement of a movable crane structure within predetermined limits.  The clamping device defines a body having a top wall which  is contacted by the  limit switches and a side wall which cooperates with a plunger to clamp the device to the crane element.  The plunger is spring-biased so that its head applies constant pressure against the crane element.   The housing, in which the plunger is contained, includes a handle which acts as a lever to compress the spring to allow retraction of the head from the crane element and quick removal of the clamping device from the crane element.
Patent CA-2043480-C (CA)
Title: Artificial dental root
Inventor: SAITO SHIGERU
IPC: A61C8/00
Filed: 1991-05-29
Granted: 1995-05-23
Abstract: There is provided an artificial dental root to be implanted into a jawbone comprising a sensor capable of contacting body fluids and a radio transmitter for transmitting electric signals representing the physical and/or chemical values of the body fluids obtained by the sensor to an external receiver.  With such an artificial dental root, the blood, the lymph and the muscles of the carrier of the artificial dental root can be examined without pain on the side of the subject to continuously watch the health conditions of the subject regardless of the psychological well-being of the subject and the doctor watching the subject on a receiving set for the radio transmitter can intervene for the health of the subject, take measures to cure, if any, the disease of the subject and give directions for emergency treatment whenever necessary.
Patent CA-2045853-C (CA)
Title: Circuit breaker with tamper indicating calibration means
Inventor: MRENNA STEPHEN ALBERT
IPC: H01H71/06
Filed: 1991-06-27
Granted: 2000-10-17
Abstract: A circuit breaker with a thermal trip has a calibration opening in the electrically insulating housing through which a tool may be inserted and rotated to distort a support plate on which a bimetal is mounted to calibrate the thermal trip after the circuit breaker has been fully assembled and enclosed within the insulating housing. A tamper indicating seal in the form of a destructible film secured over the calibration opening by an adhesive having an adhesive strength exceeding the tensile strength of the destructible film provides a visual indication of any subsequent attempts to tamper with the calibration setting.
Patent CA-2045861-C (CA)
Title: Apparatus for turning over fish fillets
Inventor: PONTOW HUGO
IPC: A22C25/08
Filed: 1991-06-27
Granted: 1995-05-02
Abstract: An automatically functioning turn-over apparatus for fish fillets, which may be arranged subsequent to a fish filleting machine, comprises a guiding channel for the fillets arranged at an inclination to slope in the con-veying direction of the fillets.  In its end portion the guiding channel has a run-off edge arranged obliquely to the longitudinal axis of the channel, while below the latter a correspondingly inclined collecting chute hav-ing a semi-circular or oval-arch-shaped cross-section is arranged such that the run-off edge faces a side-wall of the collecting surface forming a guiding face, which is arranged at a distance to the run-off edge so as to allow the passage of the fillets.
Patent CA-2055203-C (CA)
Title: Expandable thermoplastic microspheres and process for the production thereof
Inventor: LUNDQVIST JOERGEN
IPC: C09D7/65
Filed: 1991-11-08
Granted: 2000-10-03
Abstract: A method for producing expandable thermoplastic microsheres by polymerisation in a reaction vessel of an ethylenically unsaturated monomer or a mixture of monomers in an aqueous suspension in the presence of a condensed propellant. In the method, the monomer or monomer mixture is suspended in the aqueous medium in the presence of a powder stabiliser which consists of a salt or hydroxide of any of the metals Ca, Mg, Ba, Fe, Zn, Ni or Mn. The powder stabiliser is insoluble in the aqueous medium at the pH the aqueous medium has at the polymerisation. The aqueous medium may also contain a co-stabiliser. The method further comprises the step of washing off the powder stabiliser from the microspheres after the polymerisation by lowering the pH of the aqueous medium by the addition of acid.      Alternatively, amphoteric hydroxides can also be dissolved by a pH increase. The invention also relates to microspheres produced according to the method of the invention, and to the use thereof.
Patent CA-2056684-C (CA)
Title: Data display radio pager
Inventor: MATAI MASAHIRO
IPC: G08B5/22
Filed: 1991-11-29
Granted: 1995-04-18
Abstract: A data display display pager capable of automatically protecting a particular message over a limited period of time.  The receiver stores a message signal in a message signal storage area included in control means thereof.       When the pager detects out of the stored message signal protection information which is made up of a protection time signal indicative of a period of time for protecting the signal and a set of particular marks occurring before and after the protection time signal, it protects the message signal over the protection time.  The message signal is protected in either of two modes which are discriminated from each other on the basis of the number or the kind of particular marks.  During the protection time, the stored message (signal) is displayed in a first mode wherein a message without the protection information appears or in a second mode wherein the entire message appears, depending on the above-mentioned protection mode.          On the elapse of the protection time, the stored message signal has, in a first protection mode, the protection information thereof deleted or has, in a second protection mode, only the particular marks thereof deleted.
Patent CA-2059166-C (CA)
Title: Polymeric viscosity index improvers
Inventor: RHODES ROBERT BARNETT
IPC: C10M143/10
Filed: 1992-01-10
Granted: 2003-06-03
Abstract: The invention provides cyclone-finishable polymeric viscosity index improvers, produced by the process comprising the steps of: (a) preparing by anionic polymerisation a copolymer having a number average molecular weight in the range from 125,000 to 275,000, an isoprene content from 90 to 98 per cent by weight, wherein at least 85% of the isoprene units have a 1,4-configuration, and a monoalkenyl aromatic hydrocarbon content from 10 to 2 per cent by weight; and comprising a block structue A-A/B wherein A is a homopolymer block of the isoprene and A/B is a copolymer block of the isoprene and the monoalkenyl aromatic hydrocarbon, the homopolymer block A comprising at least 60% of the copolymer by weight; and (b) hydrogenating at least 95% of the isoprene and at least 5% of the monoalkenyl aromatic hydrocarbon; a process for their preparation; and oil compositions containing them,
Patent CA-2059938-C (CA)
Title: Nozzle assembly design for a continuous alloy production process and method for making said nozzle
Inventor: WANG HSIN-PANG
IPC: C22B34/12
Filed: 1992-01-23
Granted: 2002-05-28
Abstract: A nozzle assembly design and a method for making the nozzle assembly, as well as a method for controlling a continuous skull nozzle process employing the nozzle assembly are provided wherein the cooling heat transfer coefficient at the nozzle is increased to maintain a steady-state solidified layer of a noncontaminating liner material, the cooling heat transfer coefficient being increased by reducing the contact resistance between a nozzle outer wall member and an inner liner made of the noncontaminating material, the reduction in contact resistance being achieved by shrink-fitting the nozzle outer wall member around the inner liner to increase the contact pressure between those members.
Patent CA-2061345-C (CA)
Inventor: EVENS LANCE J
IPC: F24H9/14
Filed: 1992-02-17
Granted: 2003-11-04
Abstract: The edge seal mechanism of the present invention may be used in connection with clamshell or other formed sheet metal heat exchanger apparatus of the kind utilized for directing hot flue gases into a defined combustion chamber and into various forms of flue passes for radiation from such heat exchanger such combustion chamber. The improved edge seal structure for a clamshell heat exchanger of the present invention includes a first plate flange portion, around which a second flange plate portion is wrapped to define a channel for disposition of the first plate flange portion there between. The seal between the first and second flange portion is further formed and stabilized by means of a lateral bend in the first and second flange portions, with such lateral bend being in the direction of and toward the terminal portion of the second plate flange in order to secure maintenance of the seal between the first and second plate flange portions.
Patent CA-2069518-C (CA)
Title: Heated air delivery system for vehicles
Inventor: HAUSTEIN NORMAN
IPC: B60H1/00
Filed: 1992-05-26
Granted: 2002-06-25
Abstract: A heated air delivery system for vans, trucks and buses which has a single heated air distribution compartment located beneath the dashboard and designed to deliver heated air to defrost the entire windshield through a single elongated tapered defroster discharge nozzle located along the center of the dashboard. The heated air distribution compartment is also designed to deliver heated air to other areas within the vehicle's interior such as the driver's area, the stepwell entry area and the driver's side mirror.      The heated air is delivered into a plenum chamber within the air distribution compartment preferably from an opening in the bottom of the compartment. The compartment also includes a defroster pattern stabilizing baffle plate which forms within to compartment an elongated passageway for heated air flowing to the elongated tapered defroster discharge nozzle so as to provide a constant defroster air discharge pattern despite varying volumes of heated air being diverted from the plenum chamber to other areas within the vehicle's interior.
Patent CA-2070630-C (CA)
Title: Methode et appareil de contact gaz-liquide
Inventor: SMITH JAMES W
IPC: B01D53/18
Filed: 1990-12-04
Granted: 1999-04-06
Abstract: Des composants, généralement mais pas exclusivement gazeux, sont ôtés de flux de gaz dans un milieu liquide et convertis chimiquement en une phase insoluble ou physiquement supprimés. Spécifiquement, on peut supprimer du sulfure d'hydrogène de courants gazeux par oxydation dans une solution aqueuse de chélate de métal transitoire se trouvant dans une cellule de flottation agitée modifiée. On décrit également un appareil de contact liquide-gaz, associant généralement un réacteur chimique et un dispositif de séparation de produits solides, et comprenant une cellule de flottation agitée modifiée de ce type. Afin d'effectuer un transfert de matière efficace et une réaction rapide, des bulles de gaz contenant du sulfure d'hydrogène et de l'oxygène sont formées par rotation d'un agitateur à une vitesse à l'extrémité des palettes d'environ 350 pouces/sec afin d'obtenir le cisaillement requis. Pour aider cette réaction, une enveloppe circulaire comporte une pluralité d'ouvertures, ayant généralement un allongement de 1 environ, de diamètre égal et disposées suivant une configuration uniforme de manière à fournir à travers lesdites ouvertures un flux de gaz inférieur à environ 0,02 livre/min/ouverture dans l'enveloppe. En général, l'indice de vitesse du gaz est au moins environ 18 par seconde et par ouverture, mais il est préférable qu'il soit au moins d'environ 24 par seconde et par ouverture. Chacune des ouvertures a une sperficie correspondant à un diamètre inférieur à un pouce environ.
Patent CA-2071118-C (CA)
Title: Process for the preparation of alkyl 3-chloroanthranilates
Inventor: PEARSON NORMAN R
IPC: C07C213/08
Filed: 1992-06-12
Granted: 1996-06-18
Abstract: Alkyl 3-chloroanthranilates are the major product from the chlorination of alkyl esters of anthranilic acid with 1,3-dichloro-5,5-dimethyl-hydantoin.  The 3-chloro isomer can be readily separated from the accompanying 5-chloro isomer by selective acetylation of the latter.
Patent CA-2071170-C (CA)
Title: Packaging for protecting printed circuit board and other products
Inventor: COMTOIS CLAUDE
IPC: B65D5/50
Filed: 1992-06-12
Granted: 1996-11-19
Abstract: A printed circuit board support frame for protecting and transporting a printed circuit board. The support frame is molded from moldable materials and comprises a base wall section having elevated support ribs on a top face thereof for supporting the printed circuit board elevated from the base wall section. The base wall section has a hinged retention side wall member formed along a pair of opposed parallel edges thereof.          The retention side wall members, when hinged outwardly of the base wall, permit the circuit board to be positioned on the support ribs over the base wall section. The retention side wall members have one or more clamping shoulders projecting forwardly over opposed top side edge portions of the circuit board when the side wall members are maintained in a vertical position to clamp the circuit board over the support ribs. Abutment wall members are formed at predetermined locations on the base wall section to prevent the circuit board from displace-ment .
Patent CA-2072526-C (CA)
Title: Digital sigma-delta modulator and arithmetic overflow protected adder
Inventor: HASPESLAGH DIDIER RENE
IPC: G06F7/505
Filed: 1992-06-26
Granted: 1998-02-24
Abstract: A second-order digital sigma-delta modulator uses a single multibit parallel adder (AD) in time division multiplex fashion with an integration delay circuit (DL3) between the output of the adder and the output quantizer (TD). the output of the integration delay circuit being also coupled to one adder input through a 2-way multiplexer switch (SW1) and to the other adder input via an additional delay circuit (DL4).  In one position of the switch, an input sample is added to the output of the additional delay circuit and in the other, outputs from both delay circuits are added.  To account for the absence of subtractors fed from the quantizer, some of the bits outputted by the integration delay circuit are passed in inverted form, both to the additional delay circuit (INV3) and, from the inverted (INV1) output of the quantizer eventually through a third delay circuit (DL5), to the switch.