baber/WOPTO huggingface dataset:
Patent CA-2045259-C (CA)
Inventor: CRAMPTON DAVID L
IPC: H03G3/30
Filed: 1991-06-21
Granted: 1997-05-20
Abstract: RF power is sampled and measured at the input and output of a solid state pow-er amplifier using directional couplers and matched square law detectors. Outputs from the detectors are applied to differential inputs of a DC operational amplifier. Outputs from the detectors are compared and filtered in the operational amplifier and the result-ing difference signal is applied to a control input on a switching type power supply. The power supply converts a DC input voltage to the various positive and negative vol-tages required to operate the RF devices in the solid state power amplifier. When the control loop is closed, the supply voltage varies to maintain a constant operating point resulting in constant gain, efficiency, and linearity for the overall solid state power am-plifier despite variations in signal levels and signal composition. In another embodi-ment, the solid state power amplifier has a series of single-ended low power amplifiers terminating in an output high power module. In the output module, one medium power device acts as a driver stage for four high power devices connected in parallel. The out-put stages are hybrid coupled, and isolators before and after these hybrid coupled out-put stages isolate the driver from the final amplifiers and protect the output devices from reflected signals. A dynamically controlled PIN diode variable attenuator at the amplifi-er input allows the operating point of the amplifier to be selected and adjusted while the closed loop function is in operation. A hybrid matrix power amplifier system is also disclosed.
Patent CA-2045553-C (CA)
Inventor: SCHAAP ARTHUR P
IPC: C07H15/203
Filed: 1990-12-12
Granted: 1999-04-13
Abstract: An improved process for the preparation of vinyl ethers by the coupling reaction of an ester of formula (I), with a carbonyl containing compound of formula (II), wherein A and R are passive organic groups and OY is a hydroxyl group or OP where P is a protecting group is described. The ester and the carbonyl containing compound are reacted in an organic solvent with a titanium salt, a metallic reducing agent and an amine base to provide the vinyl ether. The reaction is safe and produces high yields. The vinyl ethers are useful for producing dioxetanes which produce light upon triggering.
Patent CA-2048147-C (CA)
Title: Method and apparatus for scanning a signature document
Inventor: GRAVES JAMES R
IPC: G03G15/04
Filed: 1991-07-30
Granted: 1994-10-25
Abstract: ABSTRACT OF THE DISCLOSURE           An electronic reprographic apparatus, including a method for increasing the speed of manual or semi-automatic imaging of signature-type original documents, having the ability to selectively control the areas of the documents to be imaged. In particular, the system enables the user to identify the type of input document, including size and image cropping dimensions, thereby eliminating the potential for imaging beyond document edges or in bound document gutter regions. In addition, the system is suitable for scanning both page sides of a first signature-type document on the first pass of the scan array and is capable of scanning a second signature-type document on the reverse or return pass. Furthermore, the system implements the scanning operation with a center registration technique, facilitating the registration of bound documents.
Patent CA-2049394-C (CA)
Inventor: STEEBY JON A
IPC: F16H61/30
Filed: 1991-08-16
Granted: 1995-02-21
Abstract: An improved electrically controlled, fluid pressure actuated transmission control system (100) is provided.  The improved control system includes an anti-default valve (102), preferably a normally closed solenoid controlled valve, fluidly interposed between the system source of pressurized fluid and the various pressurized and/or exhausted chambers of the system piston/cylinder actuator assembly (16).
Patent CA-2053111-C (CA)
Inventor: ZINK DONALD G
IPC: F16K51/00
Filed: 1991-10-09
Granted: 2002-03-12
Abstract: An internal valve for pressurized fluid containment vessels having vessel ports. The valve includes a valve seat associated with the vessel port and a valve member movable between a closed posi-tion against the valve seat and an open position wherein fluid can flow through the vessel port. A control chamber positioned in the vessel is connected to the valve member. A motive mechanism acting on or in the control chamber, by a control system outside of the ves-sel, controllably moves the valve member to at least one of the open or closed positions. The control chamber is sealed from fluid in the vessel by a sealing system, which includes a flexing surface against which fluid pressure in the vessel acts to thereby bias the valve mem-ber towards one of the open or closed positions.
Patent CA-2054715-C (CA)
Title: Process for the preparation of n-protected dialkyl(2s,3s)-3-ethylaspartates
Inventor: HEYWANG ULRICH
IPC: C07K5/06
Filed: 1991-02-22
Granted: 2002-05-28
Abstract: The invention relates to a process for the preparation of N-protected dialkyl (2S,3S)-3-ethyl-aspartates or their salts from unpurified (2S,3S)-3-ethylaspartic acid obtainable by enzymatic amination of ethylfumaric acid.
Patent CA-2059663-C (CA)
Title: Emulsion polymerisation
Inventor: FARMER DAVID BRETLAND
IPC: C03C25/26
Filed: 1991-06-14
Granted: 1996-11-12
Abstract: A copolymer emulsion suitable for use as a sizing agent for glass fibre is formed by microfluidising an emulsion containing at least 90 % by weight of C1 to C10 alkyl(meth)acrylate monomer and stabilised by a protective colloid, e.g. polyvinyl alcohol, prior to initiation of the polymerisation reaction.
Patent CA-2060164-C (CA)
Title: Bone nail for upper arm fractures
Inventor: SPEITLING ANDREAS W
IPC: A61L27/00
Filed: 1992-01-28
Granted: 1998-04-07
Abstract: A bone nail for upper arm fractures has a hollow shank for insertion in the proximal end portion of the medulary canal.  The shank has a distal end provided with a plurality of slots and an internal thread beyond the slotted portion.  A threaded element having a shank with a threaded portion cooperates with the internal thread and further has an expansion body at its head portion.  The expansion body is drawn into the shank and expands the slotted portion radially upon a rotation of the threaded element.  The expansion body is supported by the head of the threaded element for rotation relative to the element.
Patent CA-2062305-C (CA)
Title: Neck seal
Inventor: FARNWORTH BRIAN
IPC: B63C11/02
Filed: 1992-03-04
Granted: 2003-05-20
Abstract: An immersion suit having a neck band to fit around a neck and a seal at the neck. There is a thick band of closed cell foam on the interior of the neck band. The neck band and the closed cell foam can be compressed rapidly by a strap to ensure a seal when required. When a seal is not required, the foam is a relatively loose, comfortable fit around the neck of the wearer. In the preferred embodiment, the suit has an opening in the front extending to the top of the neck band to allow ingress and egress from the suit.
Patent CA-2066803-C (CA)
Title: Rotary forming apparatus and method
Inventor: BODNAR ERNEST R
IPC: B23D25/00
Filed: 1992-04-22
Granted: 1999-07-20
Abstract: A rotary apparatus for forming materials such as sheet metal has upper and lower rotary members rotating in unison on opposite sides of a moving strip of material, at least one die support movably supported on each rotary member for carrying forming die means, each said die support being movable in a semi-rotary manner relative to its rotary member, a first pair of guide pins located at opposite ends of die support and offset from one another towards the leading and trailing edges respectively, first guides for the first pairs of guide pins located at respective ends of each rotary member, second pairs of guide pins on each die support, located at opposite ends, and offset from one another towards the trailing edge and leading edge respectively, second guides located at each end of each rotary member, the second guides engaging the second pair of pins at a point just before the die supports close, and during closure of the die supports, and being disengaged from the second guides just after opening of the die supports.  Also disclosed is an improved form of die having an ejection opening for ejecting scrap pieces of material.          Also disclosed is a method of forming materials using the apparatus described.
Patent CA-2074190-C (CA)
Inventor: DURAND MURIEL
IPC: A61K8/00
Filed: 1991-01-29
Granted: 1997-02-11
Abstract: L'invention concerne un procédé pour la protection et la stabilisation de la dihydroxyacétone (DHA), comprenant l'encapsulation de particules de dihydroxyacétone dans une composition étanche à l'eau et comprenant au moins un polymère insoluble à l'eau, au moins une portion de la dihydroxyacétone encapsulée étant sous la forme dimère. Application aux produits cosmétiques.
Patent CA-2077409-C (CA)
Title: Portable radio communication apparatus
Inventor: IWASAKI KIROYUKI
IPC: H01Q13/08
Filed: 1992-09-02
Granted: 1996-07-09
Abstract: In a portable radio communication apparatus comprising an insulating case having an inner surface and a printed board housed in the insulating case, an antenna conductive film is coated on a predetermined region of the inner surface of the insulating case.  A conductive ground film is coated on the remaining region of the inner surface of the insulating case with a constant gap from the outer periphery of the antenna.  A first conductive member connects the antenna film with the conductive ground film.  A plurality of second conductive members connects the conductive ground film with a ground pattern of a radio communication circuit on the printed board.  A feeding member connects the antenna with an antenna terminal pad of the radio communication circuit.          The second conductive members and feeding member are conductive rods.
Patent CA-2082142-C (CA)
Title: Method and apparatus for waste incineration
Inventor: TERASAWA YOSHINORI
IPC: F23G5/20
Filed: 1992-11-04
Granted: 1998-04-21
Abstract: A method of incinerating wastes while controlling the production of dioxins wherein water vapor or water is sprayed in the main combustion zone of an incinerator.  An apparatus for practicing the method of waste incineration, including a line for supplying main combustion air, either alone or together with a line for supplying recycled combustion gas, to the incinerator from below its hearth, is provided with a line for supplying water vapor or water in communication with the line or lines.
Patent CA-2087348-C (CA)
Title: Dispositif de support et de positionnement d'un microscope
Inventor: DRUAIS HERVE
IPC: A61B19/00
Filed: 1991-07-15
Granted: 2002-02-26
Abstract: Dispositif de support (2) et de positionnement d'un micro- scope, comportant un support apte à être lié à un référentiel fixe, et une platine apte à supporter un microscope (17), un élément mobile intermédiaire (7) étant relié d'une part audit support (2) par une pre- mière série d'organes (6) articulés motorisés à structure de type pa- rallèle assurant trois degrés de liberté cartésiens XYZ et à ladite pla- tine par une deuxième série d'organes motorisés (9) à structure ro- toïde de type poignet assurant trois degrés de liberté en rotation, le dispositif comportant des moyens de commande générant des signaux de command e exploités par un calculateur pour asservir le déplacement du microscope (17).
Patent CA-2089978-C (CA)
Inventor: BORYS TADEUSZ
IPC: B29C45/14
Filed: 1993-02-19
Granted: 2005-04-12
Abstract: A molding for installation on a vehicle which includes a decorative injection-molded polymeric skin secured to an outwardly facing portion of an elongate core and method of manufacture thereof. The skin extends along the length of the molding and includes a cap unitarily formed therewith at each end of the molding. Each cap is shaped to conceal the core when the molding is installed on the vehicle. The skin of the molding may be secured to the core by a heat activable adhesive. Alternatively, the molding includes an extruded first polymeric layer compatible with the polymeric skin between a first area of the outwardly facing portion of the core and the skin, the skin being directly bonded to the extruded polymeric layer and the extruded polymeric layer being adhesively bonded to the core. In illustrated embodiments, the extruded polymeric layer and the polymeric skin are each of polyvinyl chloride, but the extruded polymeric layer and the polymeric skin may together be selected from the group of: thermoplastics including polypropylene; modified polypropylene; and thermoplastic elastomeric materials.      The injection-molded skin and end caps of the molding are generally seamless, but the skin may present areas of varying gloss and/or texture. The molding may include a second polymeric layer secured directly to a second area of the core, which second polymeric layer may be selected from the group of: ethylene propylene diene monomer and thermoplastic elastomeric materials. The molding may be tapered from one of its ends to the other or it may be of constant cross-section along its length.
Patent CA-2093160-C (CA)
Title: Electronic gimbal system
Inventor: COLEMAN GUY B
IPC: G01C19/00
Filed: 1993-04-01
Granted: 1999-05-11
Abstract: This  invention  is  directed  to  an  electronic gimbal system (10) which stabilizes a digital video image of a particular scene taken by a sensor which is under disturbance forces.  The video image is stored as a two-dimensional array of pixel locations (12) and is applied to an address look-up calculator (14) along with a signal from an inertial sensor (16).  The inertial sensor (16) determines the offset of the array of pixel locations from an inertial reference frame and adjusts the input array accordingly.    In  one  particular implementation,  the address  look-up  calculator  (14)  applies  a  bilinear interpolation to the pixel location in order to provide a weighted sum of pixel intensities for each offset pixel location.
Patent CA-2095382-C (CA)
Title: Control device for an air conditioner
Inventor: KATSUKI HIKARU
IPC: F24F11/86
Filed: 1993-05-03
Granted: 2002-12-31
Abstract: An object of the present invention is to provide an air conditioner in which the feedback of liquid refrigerant to a compressor is prevented and whose refrigerating cycle is constituted With an indoor side heat exchanger, a compressor, an outdoor side heat exchanger, and a pressure reducer. The controller of the air conditioner comprises a temperature control means which performs the cooling operation for a room in controlling the start or stop of the operation of the compressor based on the change of the room temperature, a protective means which stops the operation of the compressor compulsorily independent of the operation of the temperature control means when the open air temperature becomes lower than a specified temperature, and a display means for displaying the operation of the protective means.
Patent CA-2096340-C (CA)
Inventor: WALSH JOSEPH P
IPC: B23Q9/00
Filed: 1991-09-30
Granted: 2004-01-27
Abstract: An improved chuck which retains the shank (100) of a cutting element (101) securely therein and may be manufactured from a single piece of metal provided with a throughbore (114) which is threaded at one end (120) to mate with a driving unit. The other end of the throughbore (114) may be sized to receive a cutting tool shank (100) or a collet (115) with a longitudinal slot (107) extending completely through the collet (115) making it resiliently insertable within the throughbore (114), A clamping means is positioned offset from the centerline of the tool shank (100) or collet (115).  The clamping means may comprise two sleeves (108, 109) machined to mate with the peripheral surface (140) of the collet (115) or with tool shank (100). The sleeves (108, 109) are retained in a bore (116) extending transversely through and displaced from the center of the chuck. A threaded element (110) draws the sleeves (108, 109) into contact with the collet (115) or tool shank ( 100), maintaining a precisely centered cutting tool (101) orientation.
Patent CA-2099446-C (CA)
Title: Internal combustion engine
Inventor: MERRITT DAN
IPC: F02B19/04
Filed: 1993-06-30
Granted: 2000-05-30
Abstract: An internal combustion engine has first and second cylinders (12, 14), the first cylinder (12) having a larger swept volume than the second cylinder (14) and the second cylinder being formed in the crown of the first cylinder. First and second pistons (16, 18) are reciprocable respectively in the first and second cylinders (12, 14), the second piston (18) being formed as a protrusion on the crown of the first piston (16). The first cylinder has an air inlet (25) and an exhaust outlet (27) whilst a first fuel source (34) provides fuel to the second cylinder (14). The second piston has a crown (35) which is spaced from and connected to the crown (36) of the first piston and which has an edge (37) which is relatively thin in the axial direction compared to the spacing of the first piston crown from the second piston crown. This defines a combustion space (20) between the piston crowns and a side wall (14a) of the second cylinder (14) when the pistons are substantially at the inner dead centre position. The combustion space (20) communicates with both cylinders (12,14) during part of the expansion stroke. A spark plug (52) is provided communicating with the combustion space.      Inhibiting means is also provided for inhibiting ingression prior to the pistons (16,18) arriving at or adjacent the inner dead centre position. This can take the form of a gap (128) between the second piston crown (35) and the second cylinder side wall (14a) with a peripheral groove (39) in the second cylinder wall at its upper end to enable the fuel/air mixture in the second cylinder (14) above the crown (35) to bypass the piston crown when the latter is at its inner dead centre position and enter the combustion space (20). The geometrical compression ratio of the engine, being the ratio of the volumes within the cylinders available for occupation by gas at the piston outer and inner dead centre positions, is chosen to ensure that the pressure and temperature reached in said combustion space near the end of the compression stroke are insufficient to cause spontaneous compression ignition of the fuel used. The ignition process is started with a spark and allowed to continue by compression ignition. After the spark ignition process begins, the flame raises the pressure and temperature of the gas in the combustion space sufficiently to cause compression-ignition of the remainder of the vaporised fuel as it ingresses into the combustion space under the action of the smaller piston and mixes with more air.
Patent CA-2099719-C (CA)
Inventor: GOOSSEN JAMES ANDREW
IPC: G06F17/17
Filed: 1993-06-29
Granted: 1999-08-31
Abstract: A high speed and memory efficient system and method for rendering Bézier curves. The system utilizes a hybrid forward differencing function representing the Bézier curve defined by the Bézier control points and renders the curve with a small number of straight line segments. The system renders the curve in a manner that results in the same Bézier control points that are calculated using the prior art recursive subdivision techniques and rejects line segment approximations that would not be derived from recursive subdivision. The system can start at either end of a Bézier curve and will render the same approximation. The method is readily implemented on a computer and is applicable to Bézier curves of any order.
Patent CA-2105354-C (CA)
Title: Multimedia data storage device
Inventor: OTTESEN HAL HJALMAR
IPC: G11B20/14
Filed: 1993-09-01
Granted: 1996-10-01
Abstract: In a storage device,  such as a magnetic rigid disk drive, data is stored at varying linear densities in the user data storage portions to increase the effective storage capacity of the device as a function of the differences in soft error rate tolerance associated with the various types of data being stored and the ability of non-alphanumeric data to be enhanced by reconstruction or smoothing rather than by  an  error  correction  code.   A data  type  signal included with incoming data dictates the recording frequency and a control signal associated with the recorded data block is read when data is addressed to appropriately adjust the clock frequency for reading such addressed stored data.
Patent CA-2119465-C (CA)
Title: Method and apparatus for preventing yellowing of benzoyl peroxide solution in acrylic adhesives
Inventor: PATEL NARESH D
IPC: C09J4/02
Filed: 1992-09-01
Granted: 1997-06-17
Abstract: A method and apparatus for storing and preparing a two component reactive acrylic adhesive in which a liquid acrylic res-in (12) mixed with an organic peroxide (16) in solution without causing yellowing. A sealed container (14) is used to house the peroxide (16) solution and an inert gas, preferably nitrogen (18). The container (14) is made from a translucent or transparent ma-terial to permit viewing during the mixing operation and is covered with an opague material (20) during storage of the peroxide solution (16) and gas (18).
Patent CA-2119903-C (CA)
Inventor: WRIGHT WALTER P
IPC: D21F1/00
Filed: 1994-03-21
Granted: 1998-07-21
Abstract: An improved papermakers forming fabric having two layers of CMD yarns interwoven with a system of MD yarns to form a multi-layer fabric.  The paper support surface CMD yarn layer has at least three times as many CMD yarns as the machine contact surface CMD yarn layer.   The higher count of upper layer CMD yarns provides an improved paper forming/carrying surface with improved drainage characteristics.
Patent CA-2122052-C (CA)
Title: Device for enriching water with co- gas in order to generate carbonated water
Inventor: NOTAR ROBERT
IPC: B67D1/08
Filed: 1993-08-25
Granted: 1997-01-07
Abstract: A carbonator having a cooling system which is controlled by a controller responsive to input signals generated by an ambient temperature sensor, an ice thickness sensor and a water level sensor. After an initial ice build up following first turn-on of the system and depending on the ambient temperature sensed by the temperature sensor, the cooling system will turn on for a predetermined on period followed by a predetermined OFF period. These ON and OFF periods are variable as a function of ambient temperature as sensed by the temperature sensor and will recycle in absence of any carbonated water removed. If, however, water removal takes place, the OFF period is interrupted and system turn-on will occur the next time a signal from the ice sensor is received and the ON and OFF cycle as determined by the system controller will resume unless it is again interrupted by another water removal signal from the water level sensor.
Patent CA-2129322-C (CA)
Inventor: GRITTER DAVID JAMES
IPC: H02P21/12
Filed: 1994-08-02
Granted: 1999-02-09
Abstract: In an AC drive,  a method for stator flux oriented control of a waveform generator providing switching signals to an inverter supplying pulse width modulated current to a three-phase,  variable frequency induction motor is provided.   The method includes generating a quadrature axis stator voltage signal, a direct axis stator voltage signal, and a stator frequency signal to which switching  signals  from the waveform generator  to the inverter are responsive.