baber/WOPTO huggingface dataset:
Patent CA-2030475-A1 (CA)
Title: Ac to dc converter
Inventor: JAIN PRAVEEN K
IPC: H02M7/12
Filed: 1990-11-21
Abstract: TITLE                AN AC TO DC CONVERTER     INVENTOR                    PRAVEEN K. JAIN     ABSTRACT OF THE DISCLOSURE     An AC to DC converter is provided, suitable for use in an advanced single phase, sine wave voltage, high frequency power distribution system, such as that used in a 20 kHz Space Station Primary Electrical Power Distribution System.          The convertor comprises a transformer, a double tuned resonant network, a controlled rectifier and an output filter.  The series branch of the resonant network provides low and high impedances while the parallel branch offers high and low impedances, for the fundamental and harmonic currents of the controlled rectifier.  This results in an input current with a low content of Total Harmonic Distortion (THD).  Two types of control schemes are provided to control the output voltage of the converter. In one scheme a control of about 40% in the output voltage is obtained while maintaining the input power factor equal to or greater than 0.9.  However, in the other scheme it is possible to control the output voltage from zero to the rated value while keeping the input power factor close to unity.
Patent CA-2030551-A1 (CA)
Inventor: GOMBOTZ WAYNE
IPC: A61K9/16
Filed: 1990-05-01
Abstract: On produit de petites particules de molécules biologiquement actives en pulvérisant des solutions des molécules au moyen d'une buse dans des gaz liquéfiés très froids qui font geler immédiatement les gouttelettes pulvérisées. Les particules gelées résultantes ayant un diamètre d'environ 10 à 90 micromètres sont lyophilisées en vue de produire des particules poreuses, mises en suspension dans un non-solvant pour les molécules, et exposées à une énergie ultrasonique ou à l'homogénéisation en vue de produire des particules ayant un diamètre de 0,1 à 10 micromètres avec plus de 70 à 95 % de l'activité biologique initiale des molécules en solution.
Patent CA-2043732-A1 (CA)
Title: Epoxy resin compositions
Inventor: RENNER ALFRED
IPC: C08L63/00
Filed: 1991-06-03
Abstract: Free-flowing powdery compositions comprising A) liquid or semi-solid epoxy resins and B) solid colloidal condensation polymers of urea or melamine and formaldehyde having a pore volume greater than 1 cm3/g and a specific surface area greater than 5 m2/g. The novel compositions can be typically used as powder coating compositions, adhesives, casting resins and moulding compounds.
Patent CA-2046198-A1 (CA)
Title: Magnetic tape drive with integral multiple-cassette removable magazine
Inventor: PIERRAT MICHEL A
IPC: G11B15/68
Filed: 1991-07-04
Abstract: ABSTRACT OF THE DISCLOSURE A number of data storage cassettes are held in a removeable magazine that forms part of a tape drive by which the magnetic tapes are recorded or played. The magazine holds two parallel vertically-displaced decks of cassettes that are moved under positive driving force along a rectangular pathway formed by the two decks. From a pick-up position in the magazine, a cassette is automatically extracted by a robotic arm and placed in the tape platform for reading or writing by a conventional tape drive mechanism. When the use of the cassette is finished and it is ejected by the tape drive, a sensor activates the robotic arm to return the cassette to the pick-up position. Each deck has one unoccupied cassette space. If during the sequence of operations, the cassettes on the lower deck are moved by the width of one cassette in one direction, the cassettes on the upper deck are moved the same distance in the opposite direction. This movement results in a vacant position at the end of the upper deck farthest away from the pick-up position. The cassette in the pick-up position is either removed and loaded into the tape deck or the cycle is continued. Movement of the cassettes is produced by reciprocating drivers along the sides of the magazines. The cassettes are moved in only one direction by the reciprocating drivers and are locked to prevent movement in the opposite direction. Motions of the cassette handling mechanisms are limited by mechanical stops that trigger an electronic circuit to interrupt the driving power eliminating the need for sensitive position switches. Slip clutches prevent mechanical damage from the mechanical stops. The removable magazine does not include any electric motor drives and is automatically disengaged from the cassette driving mechanism by its removal, thus permitting economical use of multiple magazines. e-905-3               -37-
Patent CA-2049025-A1 (CA)
Title: Beverage container opening and resealing device
Inventor: DEMARS ROBERT A
IPC: B65D17/32
Filed: 1991-01-14
Abstract: A frangible seal (34) breaking and aperture resealing device for a beverage container (20) which utilizes a handle (46) being pivotally mounted on the top (24) of the beverage container (20). The handle (46) is movable from a stowage position to a frangible seal (34) breaking position and then to an aperture resealing position. There is incorporated on the top (24) a camming protuberance (48) which has the function of locating the handle (46) in an inclined or canted position so as to facilitate its movement to frangibly separate a break-away tab (32) incorporated within the top (24) of the beverage container (20). The camming protuberance (48) also exerts a biasing force tending to maintain the handle (46) in the resealing position.
Patent CA-2051524-A1 (CA)
Inventor: GEHRY FRANK O
IPC: B27M3/18
Filed: 1991-09-17
Abstract: Furniture constituted by a chair comprising a woven lattice of interlocking slats, made of wood laminate having indentations allowing fitting of the slats across one another. Manufactured from bent wood laminate slats, so that no supporting structural material is needed. The invention also provides methods of manufacturing such chairs. <IMAGE>   <IMAGE>
Patent CA-2051907-A1 (CA)
Title: Direct mount system for a fluid sampling pump and method
Inventor: NIMBERGER SPENCER M
IPC: G01H1/10
Filed: 1991-09-19
Abstract: Abstract of the Disclosure An interface is provided for mounting a sampling pump to a flow line.  The sampling pump includes a pump manifold having a hot loop flow path through the manifold, and the pump  has  an  inlet  along  the  hot  loop.    The  interface includes an interface body having tapered threads at a lower end  thereof for sealing engagement with the threads of a flow  line  nipple,  first  and  second  fittings,  first  and second nipples for sealing engagement with ports in the pump manifold body, a spacer nipple, and an interface plate for mounting between the interface body and the pump manifold. The interface of the present invention may be used to mount or remount a pump and related components within an enclosure to a flow line, and the rotational position of the enclosure may be selected after the pump body has been threaded to the flow line nipple. A method is disclosed for efficiently mounting the pump to the flow line,  thereby substantially reducing installation costs.
Patent CA-2053061-A1 (CA)
Title: Electrode assembly for-high frequency heating and coagulating apparatus
Inventor: YAMADA SHIRO
IPC: A61B18/14
Filed: 1991-10-09
Abstract: ABSTRACT           There is disclosed an electrode assembly for a high-frequency heating and coagulating apparatus which includes a planar electrode having a terminal which is connected to a high-frequency power supply, and a working face  in the form of a  flat or convex surface.   The apparatus also has a hollow cooling chamber for cooling the working face from the back side thereof.   The planar electrode  and  hollow  cooling  chamber  being  formed integrally with each other.
Patent CA-2054236-A1 (CA)
Title: Method for dissolving radioactively contaminated surfaces from metal articles
Inventor: HANULIK JOZEF
IPC: G21F9/30
Filed: 1991-10-25
Abstract: ABSTRACT OF THE DISCLOSURE         A method for dissolving radioactively contaminated surfaces of metal articles using a reagent of HBF4 acid with the addition of at least one oxidation agent, preferably hydrogen peroxide H2O2, for the efficient decontamination of radioactively contaminated metal articles.  An optimum mixture of this reagent was about 5% HBF4 acid with the addition of about 0.5% by volume of H2O2.  Radioactively contaminated lead plates, for example, were treated by this reagent, and the contaminated solution was used as an electrolyte without any further additive.  The contaminated lead or lead oxide is deposited at the anode or cathode decontaminating the solution which may be returned to the process.  If, instead of lead, the metal is copper, nickel, steel, silver or mercury or their alloys, the method for dissolving radioactively contaminated surfaces can be executed in the same way with the same reagent.
Patent CA-2057640-A1 (CA)
Title: Process for the preparation of saturated primary fatty amines by hydrogenation of the corresponding unsaturated primary fatty amines
Inventor: FRUTH ANTON
IPC: C07B61/00
Filed: 1991-12-13
Abstract: Abstract Process for the preparation of saturated primary fatty amines by hydrogenation of the corresponding unsaturated primary fatty  mines In the novel process, the hydrogenation of the double bonds in an unsaturated primary fatty amine is achieved by reaction of the unsaturated primary fatty amine with hydrogen at a temperature of 80 to 160°C and a pressure of 1 to 40 bar in the liquid phase and in the presence of 0.1 to 10% by weight of a nickel catalyst or cobalt catalyst. If the fatty amine to be hydrogenated contains ammonia, the latter is substantially removed before the hydrogenation process.
Patent CA-2060356-A1 (CA)
Inventor: BOWKER DUANE O
IPC: H04Q3/42
Filed: 1992-01-30
Abstract: A facility for establishing a signaling link over a telecommunications network connection formed by a number of network switches is provided so that one switch may communicate with another  switch in the connection.  The facility is particularly useful in controlling the number of times that signals traveling over the connection are subjected to a particular function.
Patent CA-2063070-A1 (CA)
Inventor: TAKENAKA SHINYA
IPC: G06V30/162
Filed: 1992-03-13
Abstract: In the white level detection circuit for an optical image reader, for a low value portion in an image, the white level signal corresponding to an image signal of a high value background portion which precedes to the low value portion is held steady.  Accordingly, even if the low value image portion has a long duration, the white level signal may be kept at a proper value for the image signal corresponding to the low value image signal.  For the high value background portion, the white level signal that immediately follows a variation of the image signal can be obtained. Therefore, a proper white level signal can be generated for the background portion.  Various processing applied to the image signal on the basis of the white level signal may be performed in a satisfactory manner.  As a consequence, the read performance of the optical image reader may be remarkably improved.
Patent CA-2063142-A1 (CA)
Title: Laminated film
Inventor: OKAJIMA NARIAKI
IPC: B29C55/02
Filed: 1992-03-16
Abstract: ABSTRACT OF THE DISCLOSURE    A laminated film which comprises a polyester film and at least one coating layer on one or both surfaces of said polyester film; said coating layer comprising (a) a polymer having cationic nitrogens in the main chain thereof,  (b) a binder polymer selected from the group consisting of polyesters, polyacrylates, polyurethanes, chlorine-containing polymers and mixtures thereof, (c) a material selected from the group consisting of particles, rubricants and mixtures thereof, said particles having an average particle size of not more than 10 µm and (d) a cross-linking agent selected from the group consisting of melamine cross-linking agents, epoxy cross-linking agents and mixtures thereof; and said laminated film being formed by an in-line coating method.  The laminated film is excellent in an antistatic property, adhesion and slipperiness.
Patent CA-2067557-A1 (CA)
Title: Optically triggered high voltage switch network and method for switching a high voltage
Inventor: ANDEXLER GEORGE
IPC: G05F1/70
Filed: 1992-04-29
Abstract: Abstract of the Disclosure An optically triggered solid state switch and method for switching a high voltage electrical current. A plurality of solid state switches (350) are connected in series for controlling electrical current flow between a compensation capacitor (112) and ground in a reactive power compensator (50,50') that monitors the voltage and current flowing through each of three distribution lines (52a, 52b, and 52c), which are supplying three-phase power to one or more inductive loads. An optical transmitter (100) controlled by the reactive power compensation system produces light pulses that are conveyed over optical fibers (102) to a switch driver (110') that includes a plurality of series connected optical trigger circuits (288). Each of the optical trigger circuits controls a pair of the solid state switches and includes a plurality of series connected resistors (294, 326, 330, and 334) that equalize or balance the potential across the plurality of trigger circuits. The trigger circuits are connected to one of the distribution lines through a trigger capacitor (340). Each trigger circuit also includes an energy storage capacitor (324) connected in series with these resistors. The solid state switches are selectively energized only when the potential on the distribution line is about at a peak negative value, i.e., when the voltage across the solid state switches is at a minimum, so that substantially a zero charge current flows through the solid state switches when initially gated on. In each switch driver, the light signals activate a phototransistor (300) so that an electrical current flows from one of the energy reservoir capacitors through a pulse transformer (306) in the trigger circuit, producing gating signals that turn on the pair of serially connected solid state switches (350). Once energized, the solid state switches conduct electrical current between the compensation capacitor and ground until the solid state switches are reversed biased by the potential on the distribution line. The number of optically triggered solid state switches required to control the charge current for the compensation capacitor depends upon the rating of the solid state switches used and the voltage of the distribution line.
Patent CA-2068757-A1 (CA)
Title: Track switch
Inventor: SWILLEY WILSON H
IPC: E01B25/26
Filed: 1992-05-15
Abstract: An improved switch for an overhead trolley track system, which is adaptable to be inserted between intersecting tracks and adjustable for handling trolley movement from one track to another. The improved switch includes a unique pivot and shaft assembly whereby the hub member attached to the track lift piece rotates or pivots freely about an outer shaft without applying force to an inner shaft mounted to the track, thereby avoiding constant maintenance, malfunctions, and system interruption.
Patent CA-2069297-A1 (CA)
Title: Air interceptive structure in a refractory structure
Inventor: TOYA KIYOTAKA
IPC: B22D11/10
Filed: 1991-08-08
Abstract: ABSTRACT     A refractory structure, such as a sliding nozzle device having a molten steel outlet, which ensures the isolation of molten  steel  from air.   The  refractory  structure  includes refractory materials defining a nozzle bore (7) for downward flow of molten steel, and has grooves  (9) which are formed about  the  nozzle bore  for  venting  air,  and  which  are communicated with a passage or passages (10)  leading to an outside  air  venting  device.    This  arrangement  effectively creates  a  negative  pressure  in  any  refractory  joint,  and thereby  prevents  any  air  from  entering  the  nozzle  bore through any joint.
Patent CA-2069411-A1 (CA)
Title: Method and apparatus for obtaining in-vivo nmr data from a moving subject
Inventor: SHAH AJIT S
IPC: A61B5/055
Filed: 1991-09-30
Abstract: Apparatus for obtaining in-vivo nuclear magnetic resonance data from a moving joint of a patient for imaging or spectroscopic purposes is shown which includes a support (10) for support of the patient's hand and lower arm (12). Support (10) includes a stationary section (20) and a pivotally movable section (22) which is oscillated by motor (32). A pivot shaft (26) supports member (22) for pivotal movement in the direction of arrow (30) about the shaft axis (28). Straps (14) and (16) attach the patient's hand and forearm to the respective moving and stationary sections of the support whereby the patient's wrist joint is oscillated along a predetermined path during operation of motor (32). A timing cylinder (40) with timing marks thereon is attached to shaft (26) for generation of master timing pulses by photocell (44) responsive to the timing marks through fiber optic member (42). Nuclear magnetic resonance apparatus of conventional design generates magnetic fields within region (52) at the patient's wrist, and detects nuclear magnetic signals produced by the magnetic fields. Master timing pulses control operation of the magnetic resonance apparatus during oscillation of the wrist joint for production of imaging or spectroscopic signals at different points along the path of wrist movement. For operation in the imaging mode, a motion picture display of the moving wrist joint is provided at display (78). In the spectroscopy operation mode, spectrum data is displayed at display (78).
Patent CA-2070092-A1 (CA)
Inventor: VASICHEK RICHARD A
IPC: B25B13/06
Filed: 1992-05-29
Abstract: An accessory (10) for a wrench socket (12) is disclosed including a generally cylindrical magnet (32) secured to a generally cylindrical, nonmagnetic, compressible disk (26) . The disk (26) has a shape having at least portions extending over the inner periphery of the well (14) of the socket (12) and is deformable under force to pass into and snuggly fit within the well (14) and magnetically insulate the magnet (32) from the socket (12). The magnet (32) has a size smaller than the well (14) and is secured to the disk (26) generally concentrically within the well (14), with an air space being created between the magnet (32) and the well (14) for magnetically insulating the magnet (32) from the socket (12) in the most preferred form.  The accessory (10) is removably insertable into the socket (12) of any design and model and without need for modification of the socket (12) and captures a fastener (16) slideably received in the well (14) of the socket (12) to magnetically hold the fastener (16) captive in the well (14) as the socket (12) is moved to the fastening location while not magnetizing the socket (12) or the fastener (16) sufficiently to be detrimentally magnetically attracted to metal adjacent to the fastening location.  The first face (34) of the magnet (32) is secured to the second face (30) of the disk (26) in a first form.  In alternate forms, the magnet (32) is received in a recess (46) formed in the disk (26).  The recess (46) is also shown as being frusto-conical in shape and as including an undercut (50) to hold a complementary shaped and sized magnet (32) in the recess (46) without requiring the use of glue or adhesive.
Patent CA-2070459-A1 (CA)
Title: Apparatus and method for early identification of abnormal conditions from shaft vibration data
Inventor: CHOW MICHAEL P
IPC: G01M15/14
Filed: 1992-06-04
Abstract: 56,206 ABSTRACT OF THE DISCLOSURE An   apparatus   and   method   for processing information from a plurality of data lines having amplitude and  frequency  components  representative  of  operating conditions  within  a  turbine  generator  unit  includes circuitry for determining the frequency of each data line in the frequency spectrum,  for squaring the determined frequency  of  each  data  line,  and  for  calculating  an acceleration index as  a function of the amplitude and square of the frequency.  The calculated acceleration index is transmitted to a host computer where it is analyzed to determine if the data lines contain information indicative of abnormal conditions in the turbine generator unit.
Patent CA-2074374-A1 (CA)
Inventor: NEWMAN NEIL F
IPC: C08L23/28
Filed: 1991-02-26
Abstract: A halogenation process is provided for halogenating a polymer, in which process the halogenation reaction product is neu-tralized by reaction of an aqueous alkaline material in the presence of a critical limited amount of alcohol to increase the neutrali-zation rate.
Patent CA-2075307-A1 (CA)
Title: Method for recovery of .alpha.-l-aspartyl-l-phenylalanine methyl ester, l-phenylalanine and l-aspartic acid
Inventor: ABE SOU
IPC: C07K5/072
Filed: 1992-08-05
Abstract: The recovery of .alpha.-L-aspartyl-L-phenylalanine methyl ester, L-phenylalanine and L-aspartic acid from a mother liquor obtained by solid-liquid separation of a suspension of .alpha.-L-aspartyl-L-phenylalanine methyl ester crystals, is carried out by concentrating part or all of the mother liquor without desalting to provide a non-desalted concentrate; either adding a mineral acid and methanol to a part of the non-desalted concentrate or mixing a part of the non-desalted concentrate with a solvent comprising a mineral acid, methanol, water and, optionally, .alpha.-L-aspartyl-L-phenylalanine methyl ester, to precipitate an acid addition salt of .alpha.-L-aspartyl-L-phenylalanine methyl ester; recovering .alpha.-L-aspartyl-L-phenylalanine methyl ester as its acid salt; neutralizing the acid salt and recovering .alpha.-L-aspartyl-L-phenylalanine methyl ester; hydrolyzing the remaining concentrate with a mineral acid: and recovering L-phenylalanine or L-phenylalanine and L-aspartic acid.
Patent CA-2076178-A1 (CA)
Inventor: DAGAN BARUCH
IPC: A61L12/08
Filed: 1992-08-14
Abstract: A dispenser is provided  for contact lens  solutions, comprising a support, at least two flexible and collapsible containers suspended from the support and a valve extending from the bottom of each container.  The valves each comprise a downwardly-pointing tube that may be selectively closed by a pinch valve, in order to limit backflow or entry of air into the container.   The dispenser may also comprise a single container divided into two or more internal compartments, with each compartment having valve means for the dispensing of a separate solution.  The invention further comprises a method for  storing and dispensing contact lens  fluid using the apparatus.
Patent CA-2077127-A1 (CA)
Title: Method for maintaining connections given an at least partial outage of connecting paths
Inventor: MUELLER BERND-MICHAEL
IPC: H04L69/40
Filed: 1992-08-28
Abstract: ABSTRACT OF THE DISCLOSURE    Method for maintaining virtual connections given an at least partial outage of connecting paths.   Given the occurrence of a connection disturbance,  a virtual  connection initially set up within a first packet switching network (PVN1)  is cleared down proceeding from the disturbed location up to the originating and destination switching equipment (Verm1, Verm2).  Upon employment of a specifically generated call request, a new virtual connection proceeding from the originating switching center (Verm1) is then set up between the originating and destination switching equipment of the first packet switching network (PVN1) via an alternate route upon involvement of a second packet switching network (PVN2).
Patent CA-2077709-A1 (CA)
Title: Oligonucleotides and determination system of hcv genotypes
Inventor: OKAMOTO HIROAKI
IPC: C07H21/04
Filed: 1992-09-08
Abstract: Abstract Hepatitis C virus oligonucleotides and a system to determine hepatitis C virus genotypes with polymerase chain reaction utilizing those oligonucleotides as primers.