baber/WOPTO huggingface dataset:
Patent CA-2019114-C (CA)
Title: Filter apparatus with improved filtration and saturation level detection
Inventor: HAUVILLE FRANCOIS P
IPC: B01D46/10
Filed: 1990-06-15
Granted: 2000-09-12
Abstract: An apparatus for removing contaminants generated in a volume of air contained within a work structure includes a housing, an inlet aperture disposed in the housing for receiving the contaminated air generated in the structure, an outlet aperture for passing of filtered air disposed in another portion of the housing removed from the inlet aperture and a plurality of removable interchangeable filter units disposed in the housing in spaced relationship between the inlet and outlet apertures thereby forming a plurality of chambers each defined by adjacent filter units and the housing. A detector device is engaged with at least the first chamber adjacent the inlet aperture for detecting the level of concentration of contaminants in the air passing through the chamber. The apparatus also includes a fan device to direct the contaminated air from within the work structure through the inlet aperture of the housing whereby the contaminated air passes through each filter unit and intermediate detection chambers for removal of at least a portion of the contaminants, and then to direct the filtered air through the outlet aperture. In a preferred embodiment the fan device is positioned adjacent the inlet aperture for the purpose of increasing the pressure of air passing through the filter units to thereby optimize the filter capacity of the filter units.
Patent CA-2025666-C (CA)
Title: Coding security threads for bank notes and security papers
Inventor: JONES PHILIP BRIAN BRANT
IPC: B42D15/10
Filed: 1990-01-15
Granted: 1998-04-21
Abstract: A security thread (1) for a bank note comprises a discontinuous magnetic thread (3) which has binary coding, the binary values being denoted by the presence or absence of bit lengths of thread. The co ding employed is repetitive, comprising alternating termination segments (4) and word segments (5). The length of a termination segm ent in terms of bit lengths is less than the length of a word but is greater than the maximum length permitted within a word of bits which have the same binary value as the bits in a termination segment. The invention provides resistance to false readin gs and, by varying the parameters of bit length, word length, length of the termination segment and otherwise, a multiplicity of different codings having the same general format.
Patent CA-2026736-C (CA)
Inventor: KEYAKI KEIICHI
IPC: A44B18/00
Filed: 1990-10-02
Granted: 1995-03-28
Abstract: A surface-type fastener is disclosed which includes a pair of base strips (11, 11') each having longitudinal ridges (13) and transverse ribs (14) defining therebetween elongate apertures (15). The fastener has a number of rows of interengaging elements (12), each having a stem portion (16) extending substantially at right angles from the longitudinal ridges (13), and an arm portion comprised of a pair of hook shaped engaging arms (17). The arm portion is which is substantially as large as the associated aperture (15). The interengaging elements (12) in one row are offset in position with respect to those (12) in the next adjoining row. In each row, the interengaging elements are spaced-apart longitudinally to provide an engaging space in which the arms (17) of the base strips (11, 11') can be resiliently engaged with one another when said base strips (11, 11') are pressed together. The advantage of the fastener of the invention is in that it is suitable for use not only in flexiblearticles such as clothing, sleeping bags etc. but also in relatively rigid articles such as decorative panels, furniture etc.
Patent CA-2032553-C (CA)
Inventor: TEDER REIN S
IPC: B60S1/08
Filed: 1990-12-18
Granted: 2000-02-15
Abstract: A control circuit for a windshield wiper motor is disclosed in which the wiper motor is made automatically responsive to the presence of moisture droplets on the windshield causing the wiper blades to sweep back and forth at a rate dependent upon the level of precipitation encountered. By using a set of sample-and-hold circuits, bandpass filtering and a differential amplifier under microprocessor control, disturbances to the system due to changes in ambient light are linearly rejected and the system becomes immune to such disturbances. The system utilizes an intentional-retrigger algorithm enabling the system to detect water droplets that miss the sensor yet fall within the area of the windshield which is swept by the wiper blades. The system automatically adapts to windshields of differing transmittance and is not falsely set into action by electromagnetic disturbances.
Patent CA-2034095-C (CA)
Title: Process for preparing crosslinked resin particles
Inventor: MURAMOTO HISAICHI
IPC: C08F283/02
Filed: 1991-01-14
Granted: 2002-07-02
Abstract: Disclosed is an improved process of the post-emulsion method capable of forming crosslinked resin particles which do not have fusion bonds between particles and which have good storage stability and good redispersibility in an aqueous medium. The process comprises (a) dispersing in an aqueous medium a resinous component comprising: (I) a base resin having a glass transition temperature (Tg) of 0°C or less and a polymerizable double bond, (II) a monomer which, when polymerized, provides a resin of which Tg is 20°C higher than that of said base resin, or a resin of which Tg is 20°C higher than that of said base resin, and (III) a polyvinyl compound; (b) bringing about crosslinking inside the dispersed resin particles; and (c) removing the aqueous medium therefrom.
Patent CA-2038225-C (CA)
Title: Color picture tube having improved corner support for a shadow mask-frame assembly
Inventor: RAGLAND FRANK R JR
IPC: H01J29/07
Filed: 1991-03-14
Granted: 1994-01-25
Abstract: ABSTRACT              An improved color picture tube includes an evacuated glass envelope having a rectangular faceplate panel with two long sides and two short sides. The panel includes a major axis paralleling the two long sides, a minor axis paralleling the two short sides and two diagonals that extend between opposing corners of the panel. The panel includes a shadow mask assembly mounted therein by support means that are located at the corners of the panel. The support means at each of the spaced positions includes a stud attached to the glass envelope and a spring having an aperture therein engaging the stud. The improvement comprises the studs being located slightly off of the diagonals of the panel between the diagonals and the major axis.
Patent CA-2039897-C (CA)
Title: Automatic focal-point adjustment method in flow imaging cytometer
Inventor: KOSAKA TOKIHIRO
IPC: H04N7/18
Filed: 1991-04-05
Granted: 2001-10-16
Abstract: A flow imaging cytometer for imaging the dimensions and shapes of particle components in a flow of a specimen solution employs a separate control solution, which is for managing precision, containing standard particles. A method of adjusting focal point with respect to the specimen flow includes steps of imaging the standard particles in the control solution, calculating an evaluation parameter which represents the definition of the image, and moving the flow cell or associated optical system so as to maximize the value of this parameter.
Patent CA-2041890-C (CA)
Title: Autonomous electro-optical lightning identification and ranging apparatus for, and method of, alerting humans and protecting equipment
Inventor: BYERLEY LEON G III
IPC: G01R29/08
Filed: 1991-05-06
Granted: 1995-10-17
Abstract: An  omnidirectional  lightning  ranging,  identification  and protection system having circuits that produce no false alarms or failures  to  alarm,  responsive  to  cloud  to  ground  and  cloud discharges, capable of differentiating between cloud to ground and cloud discharges, insensitive to background noise, autonomous with respect  to  power and communications  conductors  for  operating reliably in the presense of nearby lightning discharges, requiring no field calibration, that provides local and remote lightning rate and range data, and that provides mechanisms for automatically signalling and disconnecting electrical equipment for the purpose of  lightning  protection.    The  system  has circuits  that  are responsive to the electric field changes produced by lightning discharges in the frequency range between 2 khz and about 200 khz and to time coincident optical radiation in the 6000 to 9000 angstroms wavelength range.  The sensor has circuits for receiving and manipulating the optical radiation component,  circuits for receiving  and manipulating the  radiation  field  component  and electrostatic field component, and other control circuits for generating the active and inactive states and for controlling a photovoltaic  solar power source,  and  circuits  for generating digital  signals  that  produce  encoded data  representing  the occurrence, type and range to signal sources of natural lightning origin and circuits for communicating the composite data signal to a remote controller for further processing and manipulation.
Patent CA-2044899-C (CA)
Title: Apparatus for delivering laying paper for closet seat
Inventor: JUUSHI HIROYUKI
IPC: A47K13/20
Filed: 1991-06-18
Granted: 1995-02-14
Abstract: An apparatus for delivering laying paper for a closet seat comprising;  a lid whose rear end is rotatably supported by a box secured to the upper rear side of a closet pot;  the closet seat being laid under the lid with the rear end thereof being rotatably, vertically  movably  supported  by  the  box  and  urged  upwardly;  a ratchet driving portion including a ratchet rotatably supported by the box and a pawl on said lid, wherein, by the opening of the lid, the  pawl  engages  the  ratchet  to  rotate  the  ratchet  through  a predetermined angle;  a paper delivery roller portion  including a driving  roller  rotatable  by the  rotation of the  ratchet  driving portion  and  a pressure  roller  pressure-contacted to  the  driving roller and rotatable by the rotation of the driving roller, wherein the  laying paper  is  clamped between the driving  roller  and the pressure roller, and the laying paper is pulled out by the rotation of the aforesaid two rollers and the paper having a predetermined length  is delivered between the  lid and the closet  seat;  and a cutter  portion  disposed  on  the  paper  delivery  roller  portion, including a stationary lower blade disposed below the laying paper and  a movable  upper  blade  vertically  movably disposed over  the laying  paper,  wherein  the  movable  upper  blade  is  associated  in operation with the vertical movement of the rear end portion of the closet  seat and descends when pushed down by the closet  seat to thereby cut off the laying paper.
Patent CA-2045093-C (CA)
Title: A process for making low optical density polymers and copolymers for photoresists and optical applications
Inventor: SHEEHAN MICHAEL T
IPC: C08L25/18
Filed: 1991-06-20
Granted: 2004-02-03
Abstract: The present invention pertains to a process for the preparation of polymers comprising poly(4-hydroxystyrene) or substituted poly(4-hydroxystyrene) or both. The polymers have low optical density (absorbance) over a wavelength range from about 240 to about 260 nm, as well as low optical density over the near UV and visible spectrum (310 to 800 nm). Such polymers arc produced by polymerizing 4-acetoxystyrene and/or substituted 4-aeetoxystyrene monomers, with or without other comonomers, and subsequently performing transesterification. In the most preferred embodiment of the present invention, the polymers are produced using at least one alcohol as a reaction medium, a chain transfer agent and a transesterification reactant, providing an unusually economic process. These polymers are particularly useful as photoresist components for use in combination with deep UV, X-ray, and E-Beam imaging systems.        To obtain polymers having low optical density over the 240 to 260 nm radiation wavelength range, it is necessary to use an initiator which does not comprise a substantially absorbant structure over the 240 to 260 nm range or to use an initiator concentration of less than about 3 mole % of the monomer(s), to obtain a polymerization conversion of the initial polymerization monomers of at least about 90% by weight, or to remove residual monomer(s) from the reaction medium prior to transesterification, and to obtain a transesterification conversion of the polymerized monomers of at least 85% by weight. It is also necessary to avoid the use of transesterification catalysts which can cause the formation of chemical structures which can absorb over the 240 to 260 nm radiation wavelength range.
Patent CA-2049116-C (CA)
Title: Toughened epoxy matrix with improved damage tolerance and temperature performance
Inventor: BABAYAN EDUARD P
IPC: C08L63/00
Filed: 1991-08-13
Granted: 2002-09-17
Abstract: The subject invention relates to a toughened epoxy matrix formulation comprising at least two epoxy components, an amine hardener and about 10%-25% of a micropulverized polyimide thermoplastic having a molecular weight of from about 20,000 to about 100,000 and Tg of at least about 220°C.     The invention further relates to a process for preparing a toughened epoxy matrix formulation comprising: a. preheating a blend of at least two epoxy compounds to a temperature of about 130°F to about 140°F; b, blending into the epoxy blend from step (a) a micropulverized polyimide thermoplastic; c. mixing the blend of epoxy and thermoplastic at a temperature of about 110°F to about 130°F; and d. adding to the blend of epoxy and thermoplastic an amine hardener and mixing at about 110°F to about 130°F until a low mix viscosity is obtained.     The invention also relates to a prepreg prepared from the above-specified novel epoxy matrix formulation and appropriate reinforcements and a process for producing such prepregs.
Patent CA-2051845-C (CA)
Title: Determination of well pumping system downtime
Inventor: MCKEE FOUNT E
IPC: E21B47/00
Filed: 1991-09-19
Granted: 1994-08-09
Abstract: In a liquid well pumping system which is provided with a downtime between pumpoff cycles, the method of determining the maximum downtime includes running a plurality of tests to determine the relationship between runtime and downtime and determining when the relationship becomes non-linear for at least two consecutive tests. The downtime is selected adjacent the last linear relationship between runtime and downtime for providing a downtime which allows adequate fluid buildup in the well, but not so long a period as to loose well production.
Patent CA-2053057-C (CA)
Title: Device for use in positioning an article precisely in a desired location
Inventor: SZYMCZYK KRZYSZTOF F
IPC: B25J17/02
Filed: 1991-10-09
Granted: 1996-04-02
Abstract: A device for use in placing surface mount components upon PCBs having article gripping elements carried by a support.  The article gripping elements are movable between an upper position and a lower position for engaging and gripping the surface mount component.  In the lower position, the article gripping elements are freely orientable relative to a vertical axis and the elements and support coact as the elements are being raised to correct the orientation of the elements to that desired.
Patent CA-2056580-C (CA)
Title: Stabilised chlorine-containing polymers
Inventor: WIRTH HERMANN O
IPC: C08L33/14
Filed: 1991-11-28
Granted: 2002-03-05
Abstract: Chlorine-containing polymers can be stabilised against thermal and actinic degradation by addition of a sterically hindered amine and a zinc compound in the absence of other organometallic compounds. It is preferred additionally to add a 1,3-dicarbonyl compound.
Patent CA-2057368-C (CA)
Title: Method of producing non-oriented electromagnetic steel strip having superior magnetic properties and appearance
Inventor: MANABE MASAHIKO
IPC: C21D8/12
Filed: 1991-12-10
Granted: 1997-06-24
Abstract: A method of producing a non-oriented electromagnetic steel strip by subjecting a low-carbon steel slab to hot-rolling, cold rolling at a small reduction and first annealing. In order to improve magnetic flux density and surface appearance of the product, specific conditions are employed so as to coarsen the crystalline structure to obtain a controlled and moderate crystal grain size after the annealing.  The slab is cold-rolled at a rolling reduction of about 5 to 15 % and is subjected to first annealing by heating at a rate of about 3°C/sec or higher and holding the strip for about 5 to 30 seconds at 850°C to the A3 transformation temperature of the steel, while controlling the crystal grain size to about 100 to 200 µm after first annealing.
Patent CA-2059026-C (CA)
Inventor: FRANCE STEPHEN L
IPC: B65D5/20
Filed: 1992-01-08
Granted: 2003-03-11
Abstract: A tray for transporting a single slice of pizza while facilitating use of the tray as a support so that the piece of pizza can be removed from and repositioned on the tray during eating thereof. The tray includes a generally triangular bottom wall and a pair of low-height side walls which extend along opposite identical side edges of the bottom wall. The other or base edge of the tray is open to facilitate movement of a piece of pizza either onto or off of the tray. The tray is formed from a flat blank constructed preferably of corrugated paperboard; with fold lines separating the low side walls from the bottom wall so that the side walls can be folded upwardly to be generally perpen-dicular to the bottom wall. One of the side walls has a latching tab integrally associated therewith and foldable sa as to wrap around one end of the other side wall for insertion into an elongate slot which extends along the fold between the other side wall and the bottom wall to latch the tray in its assembled position.
Patent CA-2060462-C (CA)
Title: Apparatus and method for timing distribution over an asynchronous ring
Inventor: FARLEIGH SCOTT EUGENE
IPC: H04L7/00
Filed: 1992-01-31
Granted: 1996-08-27
Abstract: An asynchronous, fiber optic, ring network includes a number of nodes where data enters and exits the network. Each of these nodes has its own clock to provide timing needed by equipment at that node. So that synchronous data can betransmitted between predetermined nodes, a master node provides timing information which may be used at any node to synchronize its clock. Timing information comprises the propagation delay around the ring (ring latency) as measured by the master node. This measure of propagation delay is transmitted bythe master node as an information packet available at all nodes. Synchronization of any other node with the master requires that the other node perform its own measurement of propagation delay, compare its measurement with that of the master node, and make adjustments to its own clock that tend to decrease the differencebetween these measurements.
Patent CA-2060625-C (CA)
Title: Switched reluctance motor position by resonant signal injection
Inventor: GOETZ JAY R
IPC: H02P6/16
Filed: 1992-02-04
Granted: 2001-03-13
Abstract: An apparatus is provided far estimating the position of a rotor of a commutated brushless motor operating without a shaft position sensor. The apparatus includes a tank circuit that incorporates a phase winding of the motor. A low-power signal of a frequency F1 is injected into the tank circuit. The frequency F1 is much greater than the switching frequency F s of the phase winding.     Because the effective inductance (L) of the phase winding incorporated into the tank circuit changes in a cyclic manner in response to changes in the mechanical angle .THETA. of the rotor, the characteristic resonant frequency F0 of the tank circuit varies between maximum and minimum values.      The effect of the variation of the resonant frequency F0 on the output characteristics of the tank circuit are used by a detection circuit to resolve the mechanical angle .THETA. of the rotor and, thereby, control the timing of the phase firing sequence. The two illustrated embodiments detect changes to the amplitude and phase, respectively, of the signal from the tank circuit in response to the changing inductance of the phase winding incorporated into the tank circuit.
Patent CA-2065916-C (CA)
Title: Brick alignment clips
Inventor: PREBECK ALFREDA
IPC: E04G21/18
Filed: 1992-04-13
Granted: 2002-11-26
Abstract: A unique brick alignment clip is disclosed comprising a top face, and front and rear faces positioned on faces of a brick. A line extends between adjacent clips to align a plurality of bricks. In one aspect of the present invention the front face of the clip has irregular toothed surfaces which are drawn into the laterally outward face of the brick to secure the clip on the brick. Further, a thumb screw in the rear face also helps secure the clip on the brick. In another feature of the present invention the line extends through a central slot in the front face and around front and rear ears to secure the line to the clip. The ears are spaced laterally from a central axis of the clip, while the center slot is aligned with the central axis. The line extends rearwardly from the center slot and around the ears, such that the direction of the application of force from the line to the clip is predictable.
Patent CA-2067006-C (CA)
Title: Equipment unit latch and associated switch
Inventor: BROCKWAY ROBERT C
IPC: H05K7/14
Filed: 1992-04-24
Granted: 1996-09-03
Abstract: An equipment unit latch and an associated switch arrangement are advantageously employed to generate an action initiation signal upon initial movement of the latch toward physically removing the equipment from an equipment frame but prior to any movement of the equipment unit in an equipment frame in which it isinserted.  The physical shape and dimensions of the latch and the spatial relationship of the associated switch arrangement to the latch are such that the latch is allowed to move a sufficient distance toward removing the equipment unit from the equipmentframe in order to activate the switch to generate the action initiation signal prior to any movement of the equipment unit in the equipment frame.  In a specific embodiment of the invention, the switch includes a light emitter and a light detector.  Light from the emitter is inhibited from reaching the detector by the latch when the equipment unit is fully inserted in the equipment frame and the latch is in a closed position.  Upon movement of the latch, the light is no longer inhibited from being detected by the detector and the action initiation signal is generated after movement of the latch, but prior to any movement of the equipment unit toward being removed from the equipment frame.
Patent CA-2069741-C (CA)
Title: Cloning cartridges and expression vectors in gram-negative bacteria
Inventor: YEN KWANG-MU
IPC: C12N15/78
Filed: 1991-08-22
Granted: 1996-06-18
Abstract: Cloning cartridges comprising a positive regulatory gene nahR from plasmid NAH7, a promoter Pg that is regulated by nahR, a multiple cloning site, a transcription terminator, and a gene conferring tetracycline resistance. Such cartridges can be in-serted into plasmids of choice to form novel expression vectors in which high level gene expression is inducible with an inexpen-sive non-toxic inducer at low concentrations.
Patent CA-2070704-C (CA)
Inventor: BOBO JEAN-CLAUDE
IPC: D01F9/08
Filed: 1992-06-08
Granted: 1996-08-27
Abstract: Procédé de réalisation par fibrage d'une fibre supraconductrice à haute température critique en un matériau de la famille Bix Pby Sr2 Ca2 Cu3 Oz avec 1,9 ? x+y ? 2,3, procédé selon lequel on réalise une préforme, un fibrage et un recuit sous air de la fibre obtenue, et caractérisé par le fait que ladite préforme est constituée d'un bloc (1) en matériau vitreux de formule Bix Pby Sr2 Ca2 Cu3 Oz avec 1,9 ? x+y ? 2,3 et d'un tube (2) entourant ledit bloc en un matériau vitreux de formule Bix, Sr2 Ca1 Cu2 Oz, avec 1,5 ? x' ? 2,2.