baber/WOPTO huggingface dataset:
Patent CA-2025305-C (CA)
Title: Screw anchor
Inventor: KOLSETH DONALD HILMER
IPC: F16B37/04
Filed: 1990-09-13
Granted: 1998-02-10
Abstract: A screw anchoring device for aperture sealing attachment with an apertured panel to confine insulating material foamed in place between the panel and an attached spaced wall or other structure. The device includes a plate member having corners and a generally flat portion lying in a plane with a central aperture forming a helical screw receiving impression.  The device also has a pair of upstanding tabs projecting from one face of the generally flat portion of the plate member at opposite sides of and adjacent to the screw impression. The plate member has a raised portion formed from the plate member at the corners and along each of two opposite edges of the flat portion of the plate member. These raised portions are convexly curved upwardly from the plane of the flat portion and from the face opposite from the face with the upstanding tabs and the corners of the plate member are semi-spherical shaped. There is a continuous pad of material capable of being penetrated by a screw and having an exposable adhesive surface substantially covering and carried by the plate member with the tabs projecting for entry into the panel aperture and through the pad ant having the adhesive surface of the pad extending across the panel aperture for mounting and sealing adherence to the adjacent paneled surface to prevent egress of trapped insulating material through the paneled aperture.  The screw impression is in position for threaded engagement with a screw passed through the panel aperture and the pad for attachment of a utility component to the opposite panel surface.
Patent CA-2027467-C (CA)
Title: Dispersion of fine particles of a polymer
Inventor: YABUTA MOTOSHI
IPC: C08F299/00
Filed: 1990-10-12
Granted: 2002-01-01
Abstract: A dispersion of fine particles of a gelled polymer obtainable by copolymerizing and crosslinking a vinyl monomer mixture containing at least 0.5% by weight each of at least two vinyl monomers in the presence of a macromonomer A, which has a molecular chain of poly(12-hydroxystearic acid) and has at least about one poly-merizable unsaturated double bond per molecule in average, and a macromonomer B, which is a copolymer of an ethylenic unsaturated monomer and has a solubility para-meter value of from 7.5 to 9.2 and about 1.0 to about 1.5 in average of polymerizable unsaturated double bonds, in an organic solvent which is capable of dissolving the macromonomers A and B but is substantially incapable of dissolving a polymer formed from said vinyl monomer mixture; and a curable resin composition comprising a dispersion of fine particles of the above-described gelled polymer, a base resin which is non-compatible with the macromonomer A but is compatible with the macromono-mer B and which forms a continuous phase, and at least one crosslinking agent selected from the group consisting of an amino resin and a polyisocyanate compound.
Patent CA-2029719-C (CA)
Title: Optical disc reproducing apparatus
Inventor: ITO MOTOSHI
IPC: G11B7/005
Filed: 1990-11-09
Granted: 1995-08-15
Abstract: A detected signal of an optical pickup is applied to an automatic gain control circuit (AGC circuit) for equalizing the level of the detected signal, the output of the AGC circuit is detected by an envelope detector and is compared with a reference level by a comparator, and the output of the comparator is applied to the AGC circuit as a gate signal for holding the gain of the AGC circuit to a predetermined value during tracing of a nonrecorded part of a track, and additionally, a jump signal which is output in track jump operation of the optical pickup is applied to the AGC circuit to hold the gain to the predetermined value during the track jump operation.
Patent CA-2034697-C (CA)
Title: Coherent demodulator for /4 shifted qpsk signal
Inventor: ISHIZU FUMIO
IPC: H04L27/227
Filed: 1991-01-22
Granted: 1995-04-25
Abstract: A demodulator for coherent demodulation of a .pi./4 shifted QPSK signal includes -.pi./4 phase-shift circuit in a conventional QPSK signal decision/feedback type Costas loop to alternately rotate the phase of an inputted .pi./4 shifted QPSk signal by 0 and -.pi./4 for each symbol period interval from a timing controller, thus eliminating the .pi./4 shift component of the .pi./4 shifted QPSK signal.  Thus, coherent detection demodulation for the .pi./4 shifted QPSK signal having stable points at intervals of .pi./2 phase angles is enabled.
Patent CA-2039983-C (CA)
Inventor: BRUSSON MICHEL
IPC: B32B15/08
Filed: 1991-04-08
Granted: 1997-05-13
Abstract: L'invention porte sur un procédé de polymérisation de l'éthylène ou de copolymérisation de l'éthylène et d'au moins un ester de l'acide acrylique ou méthacrylique, en présence d'au moins un initiateur de radicaux libres, sous une pression comprise entre 800 et 2500 bars et à une température comprise entre 140.degree. et 280.degree.C, caractérisé en ce que la (co)polymérisation est effectuée en présence d'une quantité efficace d'au moins un diène non-conjugué. L'invention porte également sur un matériau complexe comprenant au moins une couche de métal enduite d'au moins une couche de film de polymère ou copolymère d'éthylène d'épaisseur comprise entre 5 et 500 .mu.m, caractérisé en ce que ledit polymère ou copolymère d'éthylène est obtenu par le procédé ci-dessus. La présente invention permet d'améliorer l'étirabilité et/ou le "neck-in" du polymère ou copolymère obtenu et par conséquent d'étendre la gamme des applications de ce polymère ou copolymère dans les techniques d'enduction.
Patent CA-2040177-C (CA)
Title: Power take-off engagement mechanism
Inventor: PITCHFORD TREVOR
IPC: F16D25/00
Filed: 1991-04-10
Granted: 1994-10-25
Abstract: A pneumatic PTO engagement mechanism (100) is provided having a feed shaft which (18) passes through a central bore in the input PTO gear (2) in known manner and which is rotationally and axially fixed in the PTO housing (1).  The PTO input gear is slidable and rotatable over the shaft, an intermediate seal (28) enables this; and a coil spring (23) to resist engagement of the PTO acts directly on the piston (26) and is received in a blind bore (12A) in the input shaft.
Patent CA-2042238-C (CA)
Title: Floating seal arrangement
Inventor: PERINI RICHARD J
IPC: F16J15/26
Filed: 1991-05-09
Granted: 1995-01-03
Abstract: Abstract of the Disclosure:      A rod seal for a linear hydraulic or pneumatic actuator cylinder includes a seal ring that has a bore that closely matches  the  diameter  of  the  rods,  proximal  and  distal cylindrical portions and a central annular flange.  A seat in the actuator cylinder distal end assembly has proximal and distal cylindrical portions and a central void to receive the rod seal ring proximal and distal portions and central flange respectively.  A radial clearance is provided so that the rod seal ring can travel radially, at least for a limited distance, while the rod passes axially through it. Static elastomeric ring seals are provided in the proximal, distal and central portions, and define pressure balancing regions.  The rod seal assembly can be constructed at low cost, yet achieve a high degree of sealing with low axial friction characteristics.
Patent CA-2042509-C (CA)
Title: Coating compositions for game balls
Inventor: KENNEDY THOMAS J
IPC: A63B43/00
Filed: 1991-05-14
Granted: 2000-09-19
Abstract: A coating composition for game balls, such as baseballs and softballs, is provided. The coating composition is comprised of a specific film-forming binder system, a fluorescent pigment, at least one compatible solvent and additional components including texturizing and leveling agents. The various constituents of the coating composition are combined together in predetermined, relative proportions to produce a composition which, when applied to a game ball such as a softball, provides a coating having qualities including a bright fluorescent color, excellent durability and weather resistance, as well as a soft leathery texture.
Patent CA-2045187-C (CA)
Title: Process for and oxychlorination catalyst, and their application to 1-2 dichloroethane production
Inventor: PETIT ALAIN
IPC: B01J27/122
Filed: 1991-06-21
Granted: 1999-04-27
Abstract: Process for the oxychlorination of a hydrocarbon to form a chlorinated hydrocarbon, in which the hydrocarbon, a gas containing oxygen and gaseous hydrochloric acid pass over a fluidisable charge comprising a mixture of an oxychlorination catalyst and of particles of at least one catalytically and chemically inert solid substance, characterised in that a solution or a suspension of a copper compound is added to the fluidised charge.
Patent CA-2047109-C (CA)
Title: Load measuring device
Inventor: PRATT HUGH MICHAEL
IPC: G01L5/10
Filed: 1991-07-16
Granted: 1997-10-07
Abstract: A load measuring device has a plurality of links 2 arranged in a chain to which a load to be measured is applied, respective sensing means G disposed on two or more links for detecting the strain on the links 2 and giving output signals dependent on the strains, and electronic processing means including a microcomputer system 12 to process the signals and to compute a value for the applied load.
Patent CA-2049830-C (CA)
Title: Foundry mould positioning and clamping installation
Inventor: BOUDOT DANIEL
IPC: B22D33/00
Filed: 1991-08-26
Granted: 1996-02-06
Abstract: Installation is for the positioning and securing of foundry moulds (2) for the upward casting of alloy metal on a casting station close to a casting ladle. Installation is made up of a support structure (1) carrying the mould (2) incorporating a casting hole open towards the bottom, some means (4) of translational transfer, at least one suspended jack (18) essentially vertical and at least one securing jack (12) essentially vertical. Casting station is sited on the nose of the melting appts. Support structure (1) incorporates flanges (8) and at least one mould carrying plate (9), the flanges (8) and the lower part of the mould carrying plate (9) being in the same horizontal plane.
Patent CA-2049895-C (CA)
Title: Fast cure in-mold coating
Inventor: COBBLEDICK DAVID S
IPC: H01B1/24
Filed: 1991-08-26
Granted: 2000-07-18
Abstract: The cure rate or time of an in-mold coating composition is greatly enhanced by the use of a minor component by weight of a catalyst or initiator in the in-mold composition comprising essentially t-butyl peroxyisobutyrate.
Patent CA-2051576-C (CA)
Title: Method and apparatus for protecting multiple copies of computer software from unauthorized use
Inventor: CHOU WAYNE W
IPC: G06F1/00
Filed: 1991-09-17
Granted: 1996-07-02
Abstract: A hardware device containing a first permanent key and a second key is plugged in a specified port of a computer to establish a communication path between the hardware device and computer.  The first and second keys are presented with an access sequence from the computer in the software which is desired to be controlled generating outputs which are applied to an algorithm decoder which provides a control key which is used to protect the software from unauthorized use.  The control key is the resultant of the algorithm decoder and the first and second keys.  One of the keys is supplied with the hardware under the control of the developer whereas the second key may be supplied with the hardware device but is not restricted to the hardware device and may be entered through a separate port of the computer.  The algorithm decoder can be included in any part of the software, the computer hardware or any combination thereof.  Many combinations of the first and second keys may be designed to produce the same control key when decoded.  One of the keys may be altered without regard to security, but there are certain values of the second key for each given value of the first key which will operate the software.  Providing a plurality of first and matching second keys which produce the plurality of different valid control keys allows the use of additional software that works in conjunction with the original distributed software acquired at a later date without the addition of additional hardware devices.
Patent CA-2051789-C (CA)
Title: Pen cap for a writing instrument barrel
Inventor: GARRY PATRICK J
IPC: B43K23/12
Filed: 1991-09-18
Granted: 2000-08-01
Abstract: A pen cap for a writing instrument barrel including a chamber defining inner housing adapted to snuggly receive a reduced nib carrying portion of the barrel and a spaced flow-through outer housing coextensive at the proximal end thereof with the inner housing to define a narrow passage therebetween with spaced radially extending rib members extending thereacross between the spaced inner and outer housing to strengthen the pen cap at the proximal end thereof.
Patent CA-2054274-C (CA)
Title: Transparent emergency eye wash fountain
Inventor: BARNUM THOMAS G
IPC: A61H35/02
Filed: 1991-10-25
Granted: 1994-07-05
Abstract: ABSTRACT           A transparent emergency eye wash fountain is provided having a portable unitary housing including a fold down tray carrying spray nozzle means for discharge of an eye wash fluid onto the eyes.  The fluid is discharged by folding down the tray to open a valve.  A liquid reservoir is positioned above the nozzle means and opening of the valve causes discharge eye wash fluid through the nozzle in a sustained gravitationally fed stream from said reservoir.  The housing is formed of a tough, impact resistant transparent injection molded polymer.  The injection molded polymer preferably has an optical transmission of at least 45% in accordance with ASTM Method #D-1003, which enables viewing through the wall of the fluid level within the housing as well as the presence of harmful contamination.
Patent CA-2057234-C (CA)
Title: Thermotropic liquid crystalline polyester compositions
Inventor: WAGGONER MARION G
IPC: C08G63/60
Filed: 1991-12-06
Granted: 2002-09-10
Abstract: This invention relates to thermotropic liquid crystalline polyester compositions containing recurring units derived from hydroquinone, 4-4'-dihydroxybiphenyl, terephthalic acid, 2,6-naphthalenedicarboxylic acid, and 4-hydroxybenzoic acid which are characterized as having melting points less than 365°C, breaking elongations greater than or equal to 1.5%, and heat distortion temperatures greater than 200°C.      This invention further relates to the same compositions containing 20 to 40 weight percent of at least one glass reinforcing/filling agent and which are characterized as having melting points less than 365°C, breaking elongations greater than or equal to 2.0%, and heat distortion temperatures greater than 230°C.      The compositions are useful as films, fibers, and shaped or molded articles.
Patent CA-2066709-C (CA)
Inventor: LINDQUIST BENGT
IPC: A61F13/53
Filed: 1990-09-19
Granted: 2001-01-23
Abstract: Article absorbant, tel qu'une serviette sanitaire ou une protection contre l'incontinence, comprenant une couche de surface (1) imperméable aux liquides, située à l'opposé de l'utilisateur lorsque l'article est porté, une couche de surface (2) perméable aux liquides tournée vers l'utilisateur lors de l'utilisation, ainsi qu'un coussinet absorbant contenu entre les deux couches de surface. L'article de l'invention est caractérisé en ce que le coussinet absorbant (3) est arqué dans son sens transversal, au moins au niveau de sa partie centrale, et de ce fait présente une surface convexe (5) du côté du coussinet tourné vers l'utilisateur lors de l'utilisation. On a prévu des moyens empêchant que la distance la plus courte entre les bords latéraux (8, 9) dudit coussinet (3) au niveau de sa région arquée, ne dépasse une valeur donnée inférieure à la largeur de la couche extérieure (2) perméable aux liquides lorsqu'elle est à plat.
Patent CA-2068115-C (CA)
Title: Improved gas conversion process
Inventor: HARDMAN STEPHEN
IPC: C07C9/02
Filed: 1992-05-07
Granted: 2002-08-20
Abstract: A process for the conversion of natural gas into higher hydrocarbons, which comprises the following steps: (i) reacting natural gas with steam in at least one reforming zone containing a reforming catalyst to produce a first product stream containing carbon monoxide, carbon dioxide and hydrogen; (ii) passing said first product stream, without separating said carbon dioxide, to a Fischer-Tropsch reactor to produce a second product stream including hydrocarbons and carbon dioxide; (iii) passing said second product stream to a recovery zone where the desired higher hydrocarbon products are recovered, the remaining components of said second product stream forming a third product stream; (iv) passing at least a portion of said third product stream into the reforming zone of process step (i).
Patent CA-2074005-C (CA)
Title: Flange ring
Inventor: WEINHOLD KARL
IPC: F16L23/028
Filed: 1992-07-16
Granted: 1995-03-21
Abstract: The invention relates to a flange ring which is divided in two along a plane extending in the axial direction and wherein, in the zone of the two abutment places each flange half has a bolt at one abutment place and a pocket at the other, so that the bolt on one flange half engages positively in the pocket of the other flange half, the flange ring being formed with holes in both flange halves for the passage of the fastening screws.  The characterizing feature of the invention is that the flange ring is divided in the centre into two identical halves (1a, 1b) and the bolt (8) so engages positively behind the pocket (9) that the flange halves (1a, 1b) are joined together in the bent state, and after being joined together the flange halves (1a, 1b) cannot be separated in the radial direction with the flange ring (1) flat.
Patent CA-2076394-C (CA)
Title: Transportation container for laboratory animals
Inventor: DE MARCO PETER F
IPC: A01K1/03
Filed: 1991-02-22
Granted: 2004-05-11
Abstract: A container made up of a smooth, seamless, synthetic resin tube with air permeable end caps which removably fasten to each end, used for transporting animals. A holder made of corrugated paper with aligned holes on opposite panels through which the containers are inserted and held.
Patent CA-2077301-C (CA)
Title: Trash compactor
Inventor: LACKNER RAYMOND F
IPC: B65F1/14
Filed: 1992-09-01
Granted: 1999-05-25
Abstract: A trash compactor is provided that has a single ram that simultaneously precompacts trash in an auxiliary precompacting chamber and compacts trash that has already been precompacted in a main compacting and storage chamber.  The ram has a single actuating device and efficiently provides for both precompacting in the auxiliary precompacting chamber and for compacting in the compacting and storage chamber with each stroke of the ram.
Patent CA-2079847-C (CA)
Inventor: REICHERT WILLIAM W
IPC: C09D7/45
Filed: 1992-10-05
Granted: 1998-01-06
Abstract: A pourable, liquid antisettling composition comprises at least one low molecular weight copolymer of ethylene and an alpha, beta-ethylenically unsaturated carboxylic acid that has been neutralized with a neutralizing agent and water.   The composition can be an additive in aqueous coating  compositions  and provides  excellent  pigment suspension and rheological properties to aqueous based coating and ink compositions.
Patent CA-2083634-C (CA)
Title: Method and apparatus for mapping page table trees into virtual address space for address translation
Inventor: WONG HUNG PING
IPC: G06F12/10
Filed: 1992-11-24
Granted: 1999-01-19
Abstract: Techniques used in a virtual memory system for mapping the page table for a process onto the process's virtual address space. The mappings make it possible for the virtual memory manager to compute addresses for the page table in the same fashion, regardless of the page table configuration required by the hardware. The techniques include linear mapping of a process's page table entries onto a portion of its virtual address space and self-recursive mapping of page trees onto the virtual address space. The techniques make porting an operating system to various kinds of hardware easier, reduce the size of the portion of virtual memory which must be reserved for the page table, and speed up references to the page table by the virtual memory manager. Further refinements permit creation of nodes of the mapped page table on demand and access of a second process's page table from a first process's page table.
Patent CA-2091815-C (CA)
Title: Variable length code word decoder for use in digital communication systems
Inventor: POLLMANN STEPHEN C
IPC: H03M7/40
Filed: 1993-03-17
Granted: 2000-05-23
Abstract: Apparatus (10) is provided for decoding variable length code words to recover transform coefficients, such as DCT transform coefficients provided by a high definition television encoder. A first category of the code words has a length of no more than n bits. A second category has a length of greater than n bits. A feedback ROM (22) is used to decode the code words. Code words from the first category are processed by directly addressing a lookup table (80) in the ROM (22). Code wards from the second category are processed using multiple passes through the ROM (22), wherein a portion of the data output during a prior pass is fed back (90) to address the memory during a subsequent pass.
Patent CA-2095257-C (CA)
Inventor: DE GAUDENZI RICCARDO
IPC: H04J13/00
Filed: 1992-08-28
Granted: 2003-10-28
Abstract: Avant de moduler la porteuse de transmission, chaque signal de données binaire se trouve codé individuellement en un symbole distinct appartenant à une constellation PSK de N symboles associés à N points distincts de manière à produire deux trains de signaux binaires (I, Q), le première train de signaux binaires (I) étant en phase avec le signal entrant et le second train de signaux binaires (Q) étant en quadrature de phase avec le signal entrant, et en ce que chacun des deux trains de signaux bi-naires (I, Q) précités est affecté d'une signature propre par combinaison avec un code d'étalement distinct (C I, C Q), de manière à produite deux trains de signaux composites étalés destinés à être appliqués chacun à un modulateur, les deux codes d'étale-ment (C I; C Q) précités étant en corrélation croisée quasi-orthogonale. Le procédé est utilisable dans un système de commu-nications par satellite en particulier pour la transmission numérique du son et tes communications par micro-terminaux ter-restres.
Patent CA-2096539-C (CA)
Title: Software structure for telecommunication switching systems
Inventor: LARSSON G HAKAN
IPC: H04Q3/545
Filed: 1992-11-19
Granted: 2002-03-26
Abstract: The disclosed system includes a declarative language construct for use in programming telecommunications switching systems, comprised of certain natural language elements such as subjects, predicates and objects. The disclosed system also includes an efficient method for constructing prototype telecommunications system software that provides the capability to handle the real-time and parallel nature of operations in telecommunications systems. In yet another aspect, the disclosed system provides a layered software architecture for use in connection with telecommunications switching systems that enhances overall system functionality.