baber/WOPTO huggingface dataset:
Patent CA-2018969-C (CA)
Title: Toothbrush
Inventor: REICHERT GOTTFRIED
IPC: A46B9/04
Filed: 1990-06-13
Granted: 1994-11-08
Abstract: TOOTHBRUSH     ABSTRACT OF THE DISCLOSURE: A manually operable tool for cleaning the teeth on both sides the tongue and the cheek side at the same time. The toothbrush comprises twin-brushes which face each other and are on twin flexible brush-holders. On the brush-holders are also the twin-brushes vertical positioners. The twin flexible brush-holders are in the twin hollow toothbrush handle partly mounted. That toothbrush handle has also cleaning slots which also may prevent the operator's hand or fingers from slipping.
Patent CA-2020535-C (CA)
Inventor: LONGWORTH FREDERIC A
IPC: B65H35/00
Filed: 1990-07-05
Granted: 2000-09-19
Abstract: A device supporting first and second tape supply rolls, the first of a first length of tape wound with its coating of pressure sensitive adhesive adjacent a core of the roll and the second of a second length of tape wound with its coating of pressure sensitive adhesive opposite a core of the roll. The two lengths of pressure sensitive adhesive coated tape are pulled from the tape supply rolls along paths comprising a common path portion having a beginning position at which portions of the coatings of adhesive along first edges of both lengths of tape are adhered together to form a composite tape structure with portions of those coatings of adhesive adjacent second edges of the lengths of tape exposed on its major surfaces.
Patent CA-2025135-C (CA)
Title: Frequency tracking circuit using samples equalized at different sampling instants of same clock period
Inventor: YOSHIDA SHOUSEI
IPC: H04L27/00
Filed: 1990-09-12
Granted: 1993-06-29
Abstract: ABSTRACT OF THE DISCLOSURE     In a frequency discriminator, a real part of complex-valued symbols which occurs at a first instant of the period of the symbols is equalized so that its intersymbol interference is minimized and an imaginary part of the symbols which occurs at the same first instant is likewise equalized to minimize its intersymbol interference. A real part of the symbols which occurs at a second instant of the period is equalized to minimize its intersymbol interference and an imaginary part of the symbols which occurs at the same second instant is equalized to minimize its intersymbol interference. The equalized first-instant real part is delayed by a first delay circuit by a time interval equal to the interval between the first and second instants, and the equalized first-instant imaginary part is likewise delayed by a second delay circuit. A first multiplier multiplies the output of the first delay circuit with the equalized second-instant imaginary part and a second multiplier multiplies the output of the second delay circuit with the equalized second-instant real part. The output of the second multiplier is subtracted from the output of the first multiplier to generate a signal representative of a frequency variation.
Patent CA-2029406-C (CA)
Title: Methods of and apparatus for digital video signal processing
Inventor: WILKINSON JAMES HEDLEY
IPC: H04N9/64
Filed: 1990-11-06
Granted: 2001-02-20
Abstract: Apparatus for demultiplexing an input 4:4:4:4-standard digital video signal into first and second output 4:2:2-standard digital video signals comprises a demultiplexer for separating the input video signal into a luminance input signal, two chrominance input signals, and a key input signal; for each said chrominance input signal, a first low-pass filter for low-pass filtering said chrominance input signal with a cut-off frequency preferably equal to 7/16 the Nyquist frequency of the input chrominance signal, a sub-sampler for sub-sampling the signal from the first filter at a ratio of 2:1 to provide a first chrominance output signal, a subtracter for subtracting the signal from the first filter from the input chrominance signal, a demodulator for demodulating the signal resulting from the subtraction with a signal preferably of 3/8 the Nyquist frequency, and a second low-pass filter for low-pass filtering the resulting demodulated signal with a cut-off frequency equal to half the Nyquist frequency, the sub-sampler sub-sampling the signal from the second filter at a ratio of 2:1 to provide a second chrominance output signal; and multiplexers for supplying the luminance input signal and two of the chrominance output signals as the first output video signal, and the key input signal and the other two of the chrominance output signals as the second output video signal.
Patent CA-2034536-C (CA)
Inventor: STAINTON JOHN ERNEST
IPC: F16H59/70
Filed: 1991-01-18
Granted: 1995-10-31
Abstract: A method and control for controlling an AMT system (10) having input shaft (IS) and output shaft (OS) speed sensors is provided including sensing faulty determinations of transmission engagement in a known gear ratio (GR).
Patent CA-2037048-C (CA)
Title: Extension tube and internal jacketing conduit assembly
Inventor: BARGE LOUIS
IPC: E21B21/12
Filed: 1990-08-02
Granted: 1998-01-27
Abstract: This invention concerns an assembly comprising a riser pipe (39) and a jacket pipe (38) inside the riser pipe comprising numerous components (56, 57, 58,...) which have been assembled together.  This assembly is characterized by the fact that the said jacket pipe (38) comprises many components (40, 41, 42,...) and that the said assembly comprises means for assembling (43, 33, 45,...) each of the said components of the jacket pipe on a corresponding component of the riser pipe.  Application to offshore oil exploration, drilling and/or extraction.
Patent CA-2037420-C (CA)
Title: Production process of solidified amorphous alloy material
Inventor: KITA KAZUHIKO
IPC: B22D27/04
Filed: 1991-03-01
Granted: 1998-01-20
Abstract: A solidified amorphous alloy material is produced from a melt of its desired metal material. A melt feeding route is provided with a first-stage quenching zone. The melt is quenched to a predetermined temperature in the first-stage quenching zone. The thus-quenched melt is then introduced into a second-stage quenching and solidification zone, whereby the melt is cooled further and solidified into a solidified material having an amorphous phase.
Patent CA-2041405-C (CA)
Title: Powder coatings of vinylidene fluoride/hexafluoropropylene copolymers
Inventor: POLEK MICHAEL DAVID
IPC: C08L27/20
Filed: 1991-04-29
Granted: 1996-10-22
Abstract: A pigmented powder coating composition comprises a resin component comprising (1) from about 50 wt.% to about 90 wt.% VDF/HFP copolymer resin having a melting point in the range of from 160°C to 170°C and a melt viscosity of from about 1 to about 4 kilopoise measured at 100 sec-1 and 232°C, and (2) from about 10 wt.% to about 50 wt.% of at least one thermoplastic acrylic resin; and a pigment component comprising from about 5 to about 30 parts of at least one pigment, per 100 parts by weight of the resin component.  The powder coating composition is prepared by pelletizing the mixture components, cryogenically grinding the pellets, and classifying the particles.  The composition is applied to a substrate, and subjected to heat treatment to form a coating.  The coatings prepared in this manner are characterized by improved flexibility, crack resistance and surface smoothness.
Patent CA-2047377-C (CA)
Inventor: SHIMIZU TOYOJI
IPC: C09K19/30
Filed: 1991-07-18
Granted: 2000-02-29
Abstract: The liquid crystal racemic mixture of the invention is represented by the formula (I):   (see formula I) wherein R1 is a specific group of alkyl, alkoxy or halogenated alkyl, X and Y are either one of the following group:-COO-, -OCO-, -CH2CH2-, -CH2O-, -OCH2-, -COCH2-, -CH2CO- and -S-S -, or a single bond, A and B are each a specific bivalent group such as 1,4-phenylene group, Z is a group selected from the group consisting of (see formula II)     and     (see formula III) (wherein R2 is an alkyl group, an alkoxy group or a halogenated alkyl group), and m and n are an integer of 0 to 2 (m and n not being simultaneously 0). The liquid crystal composition of the invention comprises the racemic mixture as described above. Moreover, the liquid crystal element of the invention comprises a liquid crystal material containing the liquid crystal racemic mixture as described above.
Patent CA-2048723-C (CA)
Inventor: MAUWS LAURENCE J
IPC: B62D61/08
Filed: 1991-08-08
Granted: 2002-05-14
Abstract: A small, three wheeled utility vehicle has a front steering wheel and two rear drive wheels driven by an automotive engine and transaxle unit. The vehicle has a frame composed of tubular steel parts welded together to provide a complete cage around the passenger compartment and an engine and cargo area behind the passenger compartment. The body of the vehicle is composed of body panels mounted within the tubular frame.
Patent CA-2051305-C (CA)
Title: Optical fiber soot synthesis apparatus
Inventor: MIKAMI TOSHIHIRO
IPC: C03B37/014
Filed: 1991-09-13
Granted: 1999-03-30
Abstract: An optical fiber soot synthesis apparatus which synthesizes around a fiber starting member forming a core of an optical fiber an optical fiber soot forming a cladding and which accurately calculates in real time the mass of the optical fiber soot when deposited so as to control the synthesis of the optical fiber soot. The optical fiber soot synthesis apparatus measures the weight of the rotating fiber starting member and optical fiber soot by a pair of soot weight detection sensors arranged at a fiber starting member support and rotational drive mechanisms divided so as to prevent the weight of the rotational drive mechanisms from having much of an effect. The computation and control apparatus performs operational processing from the measured weights and calculates the mass of only the optical fiber soot synthesized on the fiber starting member in real time. The computation and calculation apparatus refers to the calculated mass to control the synthesis of the optical fiber soot.
Patent CA-2057679-C (CA)
Title: Postage meter security system
Inventor: BREWSTER WILLIAM H JR
IPC: G07B17/00
Filed: 1991-12-16
Granted: 1994-11-01
Abstract: A postage meter having a plurality of value wheels extending through a window in a housing, and die protector bars between the value wheels, the die protector bars having a first position at which they extend a further distance from the housing than the value wheels, and a second, retracted, position. The die protector bars extend in the housing between a pivot block and a cam block. A die shield is slidably movable between a first position aligned with the window, and a second, retracted, position. The cam block and dead bolt are positively moved in common via cam surfaces, by a rotatable yoke. A latch lever may engage the dead bolt to latch the postage meter to a mailing machine.
Patent CA-2059418-C (CA)
Title: Two stage automatic shutoff valve
Inventor: LEBLANC LEO J
IPC: B65D90/26
Filed: 1992-01-15
Granted: 1995-04-04
Abstract: A two stage float actuated shutoff valve for preventing overfilling of an underground storage tank has a first float actuated valve flapper movable to a closed position block a major portion of the fuel inlet passage of the underground tank when the level of fuel in the tank rises to a first predetermined level.  Closure of the first valve generates an observable water hammer effect signalling that the filling operation should be terminated and at the same time the rate of flow of fuel into the tank is substantially reduced.  If the incoming flow is not terminated, the continued rise of the level of fuel in the tank will in time actuate a second float controlled valve to completely close the fuel inlet passage.  The incoming fuel is supplied from a delivery truck tank, fuel flowing gravitationally from the truck tank through a manually operable shutoff valve on the tank, a delivery hose and a drop tube which conducts fuel from the delivery hose into the underground tank.  Once closed, the second float controlled valve will remain closed as long as the truck tank shutoff valve is open, upon closure of the truck tank shutoff valve the resulting reduction of the hydraulic head on the second valve is reduced to a head which can be overcome by a spring biasing the second valve to its open position so that fuel can be drained from the delivery hose and drop tube into the underground tank.  In a second embodiment, tubular floats slidably mounted on the drop tube within the tank independently operate pivoted flapper valves to a closed position within the valve housing, a lower float closing one valve flapper to block a major portion of the incoming fuel flow passage when the level of fuel in the storage tank reaches a predetermined first level and a second upper float closing a second flapper to completely close the flow passage when the level of fuel rises to a predetermined level about the first level.  A float actuated locking arrangement for preventing inadvertent premature closing of either valve flapper is disclosed.
Patent CA-2061830-C (CA)
Inventor: FUNAKI KEIICHI
IPC: G10L25/90
Filed: 1992-02-25
Granted: 1996-10-29
Abstract: A speech signal coding system for coding a speech signal at a bit rate of 8 to 4 kb/s wherein the mount of calculation in fractional search of delays of an adaptive codebook is reduced significantly.  Before a fractional delay of the adaptive codebook is found, candidates of integer delay are found by an open-loop using correlation values.  A search of a fractional delay by a closed loop is performed for a search range for fractional delays which is provided by several samples of each integer delay candidate thus found using the correlation values.  The fractional delay search is realized by polyphase filtering of excitation signal in the past.  In the search, a plurality of candidates of fractional delay may be found for each integer delay candidate from the adaptive codebook.  In this instance, a fractional delay is determined decisively from the decimal delay candidates after a search of a excitation codebook.
Patent CA-2063377-C (CA)
Title: Procedure and apparatus for controlling a barking process
Inventor: SILENIUS SEPPO
IPC: B27L1/02
Filed: 1991-04-29
Granted: 1996-05-07
Abstract: A procedure and apparatus for controlling the barking process in a barking drum, which procedure uses measuring devices placed in conjunction with the barking drum to measure the weight of the drum. The measurement signals obtained from the weight-measuring devices are used to calculate the degree of fullness of the drum, and this data is used to control the position of the delivery gate of the drum so as to achieve the desired degree of fullness. Moreover, the degree of barking of the logs is monitored, and the barking degree data is used as a basis for the control of the speed of rotation of the drum.
Patent CA-2068944-C (CA)
Inventor: HOFFMAN CHARLES J
IPC: E05F1/06
Filed: 1992-05-19
Granted: 1995-09-26
Abstract: A refrigerator cabinet has a door closing device integral with a door top hinge member to fit within the door. The mechanism includes a bearing member secured to the door and a cam member nonrotatably secured to the hinge pin below the bearing member and having a cam follower engaging a cam surface on the lower face of the bearing member.  A spring is secured around the lower end of the hinge pin to force the cam member upward against the bearing member and its cam surface, with the cam surface and a cam follower on the cam member being configured to provide a closing bias when the door is near the closed position and detent positions when the door is opened a predetermined amount.
Patent CA-2072262-C (CA)
Title: Semiconductor device and method for manufacturing the same
Inventor: HARADA KEIZO
IPC: H01L23/12
Filed: 1992-06-25
Granted: 1999-08-10
Abstract: A plastic package type semiconductor device is composed of a rolled metal substrate made of copper or copper alloy and an insulating film formed on the surface of the substrate. The film may be a single-layer film made of silicon oxynitride or a composite film formed by laminating a silicon oxide layer and a silicon oxynitride layer (or a silicon nitride layer). A semiconductor element is mounted on the film or on the exposed surface of the substrate. Other passive elements are provided on the film. After connecting these elements with bonding wires, the entire device is sealed in a resin molding. This device is thus free of cracks due to difference in thermal expansion between the film and the substrate, or peeling due to moisture absorption.
Patent CA-2072451-C (CA)
Inventor: KONDO TETSUSAI
IPC: G10H1/00
Filed: 1992-06-26
Granted: 1997-05-06
Abstract: A  device and method prevents the imbalance of  emission timing between strong key strokes and weak key strokes in  an automatic  performing piano by preventing the  occurrence  of reverse  phenomenon  and  overlap  phenomenon  by  correcting cessation  timing  according  the order or  sequence  of  key strokes.   A reverse phenomenon,  where cessation timing  for one  key stroke precedes its counterpart emission timing,  is prevented  by  changing  cessation  timing  to  occur   after emission  timing.   An  overlap  phenomenon,  where  emission timing  for  the latter of two  successive  strokes  precedes cessation timing  for  the former stroke,  is  prevented  by changing the cessation timing to occur prior to the  emission timing.  The method and device thus achieves reproduction  of performance  with  balanced and  controlled  sound   emission timing  and high fidelity in performance reproduction.
Patent CA-2074177-C (CA)
Title: Method for producing a carrier for cation exchange liquid chromatography and a method for determining glycosylated hemoglobins using the carrier
Inventor: TAKECHI MASAHIRO
IPC: G01N33/72
Filed: 1990-11-21
Granted: 1997-10-21
Abstract: According to the present  invention,  a production method of a carrier appropriate for cation exchange liquid chromatography  and  a  method  for  determining  glycosylated hemoglobins using the carrier obtained by the production method are provided.  The production method of the carrier comprises the steps  of  providing hydrophobic particles  to which  a polymerization initiator is adhered; and adding a polymerizable monomer having a carboxyl group to an aqueous dispersion in which  the  hydrophobic  crosslinked  polymer  particles  are dispersed and polymerizing the monomer on surfaces of the hydrophobic crosslinked polymer particles, thereby obtaining polymer particles the surfaces of which are coated with polymer layers having carboxyl groups.
Patent CA-2076107-C (CA)
Title: Frame/slot synchronization for u.s. digital cellular tdma radio telephone system
Inventor: TOY RAYMOND LEO
IPC: H04L7/08
Filed: 1992-08-13
Granted: 2000-11-28
Abstract: Frame/slot synchronization is applied to a received Time Division Multiple Access (TDMA) signal and a temporal position of a reference feature is acquired, such as a synchronizing bit stream or preamble, associated with a desired time slot. The desired time slot is but one of a plurality of time slots that comprise a frame. Verification that the acquired temporal position corresponds to the desired time slot is performed by repetitively estimating a temporal position of the reference feature in a subsequent frame and sampling the subsequent frame at the estimated temporal position to determine if the reference feature is present. The temporal position of the reference feature of the desired time slot relative to the frame is maintained over a plurality of received frames.
Patent CA-2080417-C (CA)
Inventor: MAGNOTTA VINCENT LOUIS
IPC: D21C11/04
Filed: 1992-10-13
Granted: 1996-09-17
Abstract: A method for white liquor oxidation in a kraft mill utilizes a two-stage selective oxidation system in which the first stage is operated to remove sulfide while the second stage is operated to oxidize a significant fraction of the remaining oxidizable  sulfur compounds to sulfate.  The resulting selectively oxidized white liquor products are used as alkali sources for various process steps in the mill. Optionally, white liquor can be oxidized in a single stage to convert a significant fraction of the oxidizable sulfur compounds to sulfate.  Methods for controlling the selective oxidation process are disclosed.
Patent CA-2084122-C (CA)
Title: Fireproof shaft door for lift installations
Inventor: PELVILAIN JEAN-CLAUDE
IPC: B66B13/30
Filed: 1992-11-30
Granted: 2003-01-07
Abstract: With this fireproof shaft door, an improved heat insulation towards the shaft side is achieved in the case of a fire at the lobby side, whereby the lift shaft in the case of fire remains maintained as escape path for the fire service. A door box (24), which is filled with heat-insulating fields and heat-insulating mats, is arranged at the lobby side at a frame (23), which is carried by a door suspension (14), consists of metal profile plate and is guided by a guide blade (22). Horizontal spars (28), which are provided with ventilation holes and at the shaft side carry heat-insulating plates (29) covering the door front, are arranged at the frame (23) at the shaft side. The first hollow space (30), which is formed by the heat-insulating plates (29) spaced from the frame (23), acts as natural chimney, in which fresh air denoted by A circulates.
Patent CA-2087212-C (CA)
Title: Transfer belt
Inventor: FAGERHOLM LARS ERIK CHRISTIAN
IPC: D21F3/04
Filed: 1993-01-13
Granted: 1997-11-04
Abstract: A transfer belt for eliminating an open draw between a press in a papermachine and a transfer point has a supporting base with a particle-filled polymer coating.   The coating, which constitutes the paper side of the transfer belt, carries the paper sheet from a press nip in a closed draw to a transfer point without sheet flutter or drop-off.   At the transfer point, the paper sheet is readily released to another sheet-conveying papermachine-clothing product. The transfer belt may carry the sheet through more than one press nip.  The transfer belt surface has a pressure-responsive recoverable degree of roughness, which is made relatively smooth by compression in the press nip, allowing the thin, almost continuous water film to form between the transfer belt and the paper sheet.  When leaving the press nip, the paper sheet is held to the transfer belt by the thin, almost continuous water film.  Following exit from the press nip, the transfer belt surface recovers its uncompressed roughness, breaking up the water film, so that, by the time the paper sheet reaches the transfer point, it is readily released by the transfer belt to the next sheet-conveying papermachine-clothing product, which might be a felt, a belt, or a fabric.
Patent CA-2095929-C (CA)
Title: Self-adhesive wallcoverings
Inventor: BROWN KENNETH D
IPC: B65D85/671
Filed: 1992-09-14
Granted: 2002-11-19
Abstract: A package comprising a sealed container containing a roll of wallcovering material which comprises a hydrophilic sub-strate layer, a pressure sensitive adhesive layer on one surface and, on the other surface, a decorative layer, usually including a layer of PVC or other plastics material. The wallcovering material is preferably self-wound on a roll. The moisture content of the wallcovering material is controlled in the package so as to provide a desired area of the product which falls between the area of the product where it is soaked in water under predetermined conditions and the area of the product when it is preconditioned un-der relatively dry, predetermined conditions. The moisture content is generally above the equilibrium content under normal am-bient conditions so that any problems caused by expansion of the product in use under humid conditions, such as bubbling and raising of the edges of the material at seams, are minimised. In a process for producing the product the moisture content is moni-tored during the process, usually downstream from a drying stage, for instance the drying stage following application of an aque-ous adhesive.