baber/WOPTO huggingface dataset:
Patent CA-2036297-C (CA)
Title: Heat-sensitive cut-off for gas conduits and the like, and method of manufacture
Inventor: STURGIS MALCOLM B
IPC: F16K17/40
Filed: 1991-02-13
Granted: 1999-02-23
Abstract: An improved heat sensitive cut-off for blocking the flow through a gas conduit or the like of the type comprising first and second cut-off members disposed in the conduit which co-operate to block flow through the conduit when they are brought together.  The first cut-off member has a socket therein.  A spring biases the cut-off members together,  and a spacer between the cut-off members for separates them to permit flow through the conduit.  The spacer has a portion penetrating partway into the socket in the first cut-off member.  A plug of a relatively low melting point material is located in the bottom of the socket  for  temporarily  preventing  the  spacer  from penetrating further into the socket.  The socket and the spacer are configured so that when the plug melts the spacer can penetrate further into the socket sufficiently that the spring can move the cut-off members together to block the flow through the conduit.  The first cut-off member and the spacer are secured together mechanically or with an adhesive to prevent them from separating and interfering with the proper operation of the cut-off.
Patent CA-2039524-C (CA)
Title: Electromagnetic clutch
Inventor: MATSUSHITA TAKASHI
IPC: F16D27/14
Filed: 1991-04-02
Granted: 1997-01-21
Abstract: An electromagnetic clutch assembly for use with a refrigerant compressor for an automotive air-conditioning system includes a first rotatable member, such as a rotor, having an axial end plate of mag-netic material and a second rotatable member connected to an outer end of a drive shaft of the compressor. An armature plate of mag-netic material is elastically connected to the second rotatable mem-ber. The armature plate faces the axial end plate of the rotor with an axial air gap therebetween. An electromagnetic device is disposed within the rotor and is operable to attract the armature plate into contact with the axial end surface of the rotor such that the rotation of the rotor can be transmitted to the drive shaft when the electro-magnetic device is activated. The electromagnetic device includes at least first and second electromagnetic coils which are axially aligned so as to generate a thermal difference therebetween when heat is conducted to the electromagnetic device from a contact surface between the axial end plate of the rotor and the armature plate. The first and second coils are connected in series between the battery and ground. A control device controls the connection and disconnection of the electromagnetic device to the battery. The control device disconnects the electromagnetic device to the battery when the ther-mal difference exceeds a predetermined value while the electromag-netic device is activated.
Patent CA-2041520-C (CA)
Title: Vertically downwards propagating pillar working
Inventor: SEPPANEN PENTTI SAKARI
IPC: E21C41/22
Filed: 1991-04-30
Granted: 1997-03-04
Abstract: The invention relates to a cut-and fill method of a mine, where the working is done by pillar working, which propagates verti-cally downwards. The working is done by placing the stope and the pillars interlaced with each other when propagating downwards. The pillars are made by the hardening fill-method and likewise, at the bottom of the excavated stope, in the lower corners, a bed of hardening fill is made.
Patent CA-2042202-C (CA)
Title: Galvanically active transdermal therapeutic system
Inventor: HORSTMANN MICHAEL
IPC: A61L15/00
Filed: 1991-05-09
Granted: 1998-06-23
Abstract: A transdermal therapeutic system which is composed of layers exhibits an electrically insulating backing layer (1) being impermeable to active substances, and two galvanic elements which are positioned in separation from each other. The skin-facing electrodes of the galvanic elements have layers thereon consisting of a liquid absorbing material becoming ionically conductive after liquid admission. The layer of at least one of the dermad electrodes comprises a pharmaceutical active substance.
Patent CA-2044469-C (CA)
Inventor: MARKS BRUCE GEORGE
IPC: H01J29/07
Filed: 1991-06-13
Granted: 2001-11-20
Abstract: An improved color picture tube has a shadow mask having an aperture array including slit-shaped apertures aligned in columns that essentially parallel the minor axis and end at a border of the array. Adjacent apertures in each column are separated by tie bars in the mask. The tie bars in one column are offset in the longitudinal direction, paralleling the minor axis, from the tie bars in each adjacent column. The spacing between tie bars in a column is the tie bar pitch at a location on the mask. A first set of columns, comprising every other column, has increased tie bar pitch at the ultimate end apertures, as compared to the tie bar pitch at the penultimate apertures in each of the columns. In a second set of columns, every other column not in the first set has decreased tie bar pitch at the ultimate end apertures, as compared to the tie bar pitch at the penultimate apertures in each of the columns. The last tie bars before the ends of the aperture columns in the second set are shorter than the next to the last tie bars, measured in the longitudinal direction of the columns, and the ultimate apertures at the ends of all of the aperture columns end on a smooth border line.
Patent CA-2045526-C (CA)
Title: Process for preparing silicon carbide
Inventor: WEIMER ALAN W
IPC: C01B31/36
Filed: 1990-01-11
Granted: 2001-03-27
Abstract: A process for preparing silicon carbide by carbothermal reduction involves rapidly heating a particulate reactive mixture of a silica source and a carbon source to form a product which shows improved uniformity of crystal size. The product of this process can be used to form a densified part. The process comprises:  passing a particulate reactive mixture (24) of a silica source and a carbon source into a reactor having (a) a reactant transport member (6), the reactant transport member having a wall defining a hollow conduit, the wall having a cooling means and being further characterized as having a concentric inner wall defining an inner annular space (20), the inner annular space having an inlet and being open at the bottom such that a gas can be flowed therethrough; (b) a reactor chamber (16), the reactor chamber having a wall (26), defining a reaction zone (28), the chamber being in fluid connection with the reactant transport member; (c) a heating means (40), the heating means being suitable for heating the particulate reactive mixture in the reaction zone;  and (d) a cooling chamber (42), the cooling chamber having a wall (48) defining a cooling zone (44), the wall having a cooling means, the cooling chamber being in fluid connection with the reactor chamber; the temperatures of the reactant transport member, reactor chamber, and cooling chamber being independently controllable;  such that the particulate reactive mixture can be fed continuously through the reactant transport member into the reactor zone and than into the cooling zone.
Patent CA-2050164-C (CA)
Title: Particle detector and particle detecting apparatus having the detector
Inventor: KOUZUKI CHIHIRO
IPC: G01N15/12
Filed: 1991-08-28
Granted: 2001-06-05
Abstract: A particle detector is designed to detect particles such as cells and blood corpuscles. The particle detector includes means for passing and recovering, through an orifice, a multilayer flow consisting of an inner layer of a conductive liquid specimen, a middle layer of conductive first sheath liquid, and an outer layer of nonconductive second sheath liquid surrounding them.      A pair of electrodes disposed on opposite sides of the orifice contact the conductive liquid.      A particle detecting apparatus incorporates this particle detector, and a detector circuit connected to the pair of electrodes detects a particle signal on the basis of differences in the electric impedance between the electrodes.      An electric current flows from one electrode to the other electrode through the conductive liquid portions, that is, the inner layer A and middle layer B. Since the outer layer C is nonconductive, the current does not flow in it. Accordingly, the diameter of the orifice effectively is substantially the same as the diameter of the middle layer.      The diameter of the middle layer. may be freely changed by varying the flow rate balance of the conductive liquids and nonconductive liquid. Accordingly, the apparent diameter of the orifice may be changed as desired.
Patent CA-2050997-C (CA)
Title: Superconducting motor with multiple winding rotor
Inventor: LLOYD JERRY D
IPC: H02K55/00
Filed: 1991-09-09
Granted: 1996-04-23
Abstract: A superconducting motor (1) comprises a stator (3) and a rotor (5), both of which employ superconductive windings.  The rotor includes two sets of windings, a large rotor winding (13 and a small rotor winding (15).  The windings are connected to form a current loop (16) which is exposed to a magnetic field.          Switches (S1, S2) or diodes (D1, D2) are employed to trap a maximum number of magnetic flux lines in the loop when the magnetic field is impressed on the loop.  Thereafter, the trapped flux is transferred from the small to the large winding to run the motor.  When the switches are closed, the loop acts as a perfect conductor whereby no flux change occurs within the loop.
Patent CA-2054192-C (CA)
Title: Pen
Inventor: NICOLL ROY
IPC: B43K5/02
Filed: 1990-05-10
Granted: 1995-05-09
Abstract: A reservoir pen includes a valve operated by the pen nib (4) to allow ink to pass to the nib, the ink flow rate being con-trolled by a flow restricting device (8) located between a primary ink reservoir chamber (2) enclosed within the pen barrel (1) and a secondary ink reservoir chamber (6) of much smaller capacity from which an ink channel (10) leads to the valve. The device (8) is a length of an extruded rod of microporous plastics. The nib is pressed towards the feed bar (3) by one spring element (21) and the valve member (12) which cooperates with a seat defined by the feed bar is urged to its closed position by another spring ele-ment (28). The rear end of the primary ink chamber (2) is closed by a grease plug comprising a mass of grease and a skeletal rein-forcing frame.
Patent CA-2054358-C (CA)
Title: High acid nutritional formulations
Inventor: KVAMME CANDIS D
IPC: A23L1/305
Filed: 1991-10-30
Granted: 2004-12-28
Abstract: Improved liquid oral nutritional formulations comprising based on the total formulation calories, from 40 to 90 % of the calories as carbohydrates, from 2 to 30 % of the calories as protein, from 0 to 35 % of the calories as fat, and from 0 to 17 % of the calories as fiber, whereby the protein source is for at least 60 % by weight whey protein concentrate and the pH of the formulation is from 3.5 to 3.9.
Patent CA-2056463-C (CA)
Inventor: HAN YONG HEE
IPC: G11B15/50
Filed: 1991-11-28
Granted: 1997-04-15
Abstract: A differential power transmission device for a tape recorder includes a pulley gear, a connecting gear, and a driven gear mounted on a main base for rotation about respective axes. The connecting gear engages the driven gear, and is axially movable for selectively engaging and disengaging the pulley gear. A pivot member axially moves the connecting gear so as to selectively engage the connecting gear with the pulley gear, so that the driven gear is driven by the rotation force of the pulley gear transmitted via the connecting gear. The pivot member is arranged to pivotally move by movement of asupport plate, and includes at least one extension member that reciprocates substantially perpendicular to the main base in response to pivoting of the pivot member, so as to impart axial movement to the connecting gear to cause the same to selectively engage or separate from the pulley gear.
Patent CA-2058972-C (CA)
Title: Process and installation for treating liquids charged with pollutants
Inventor: LEITZKE ORTWIN
IPC: A61L2/20
Filed: 1990-06-13
Granted: 1998-04-28
Abstract: A process and an installation for treating liquids, which are charged with pollutants that are difficult to break down, by means of wet oxidation with ozone-containing gas and UV radiation.  The installation comprises injectors (6,8), by means of which ozone-containing gas produced in an ozone generator (10) can be passed into the liquid.  The liquid is then introduced into a reaction and degasification vessel (20), before it passes through the UV irradiation units (40,50).
Patent CA-2063934-C (CA)
Title: Exhaust system for v-configured internal combustion engine with close-mounted catalytic converter
Inventor: MAUND EHREN R
IPC: F01N3/28
Filed: 1992-03-26
Granted: 1993-10-26
Abstract: EXHAUST SYSTEM FOR V-CONFIGURED INTERNAL COMBUSTION    ENGINE WITH CLOSE-MOUNTED CATALYTIC CONVERTER                 ABSTRACT OF THE DISCLOSURE  An exhaust system for a v-configured, internal combustion engine having a close-coupled, catalytic converter having a converter assembly located adjacent the engine comprising a pre-chamber upstream of the catalyst support which has inlet assemblies oriented, and a cross-section configured to induce a centrifugal swirling action in the exhaust gas as it passes therethrough.  The swirling action of the exhaust gas inhibits reversion of particles, trapped upstream of the converter, into the engine.
Patent CA-2064124-C (CA)
Title: Process for the detoxification of cyanide-containing aqueous solutions
Inventor: STEINER NORBERT
IPC: C02F1/72
Filed: 1992-03-26
Granted: 2002-05-28
Abstract: The invention relates to a process for the detoxification of aqueous solutions containing cyanides and/or cyano complexes in the presence of heavy metals from the group consisting of Mn, Co, Ni, Cu, Cd and Zn, more particularly Cu, by oxidative treatment of the solutions with peroxide compounds at pH values of 8 to 12.      Peroxide compounds from the group consisting of alkali metal and alkaline earth metal perborates, alkali metal percarbonates and alkaline earth metal peroxides being used as the peroxide compounds. The peroxide compounds are added as such to the solutions to be detoxified or are formed in situ therein from hydrogen peroxide and the other components. Sodium perborate, sodium percarbonate and calcium peroxide are preferred. The process is more effective in regard to the quantity of peroxide compounds used than the known process using hydrogen peroxide and also enables manganese-containing solutions to be detoxified.
Patent CA-2064168-C (CA)
Title: Detergent compositions and process for preparing them
Inventor: APPEL PETER WILLEM
IPC: C11D17/06
Filed: 1992-03-26
Granted: 1996-12-10
Abstract: A single-step process for the continuous preparation of a granular detergent composition or component, whereby 20 to 45% of a liquid acid precursor of an anionic surfactant, and at least an equivalent amount of a solid water-soluble alkaline inorganic material are continuously fed into a high-speed mixer/densifier, the mean residence time being from about 5 to 30 seconds, whereby the moisture content of the powder in the mixer is from 5 to 15%, and a degree of neutralization of at least 80% is attained.
Patent CA-2069001-C (CA)
Title: Method for the preparation of a catalyst component for the polymerization of olefins, a polymerization catalyst component produced by the method and use of the same
Inventor: KOSTIAINEN ARJA
IPC: C08F10/00
Filed: 1990-11-20
Granted: 2001-09-11
Abstract: The invention relates to a method for the preparation of a solid procatalyst composition for a catalyst system intended for the polymerization of olefins, wherein a magnesium halide, such as magnesium chloride, is dissolved and/or slurried in a mono-carboxylic acid alkyl ester, such as ethyl acetate, is impregnated into a support material, dried, treated with an organometallic compound or a silicon compound and thereafter with a transition metal compound. The invention also relates to such a procatal-yst composition and its use together with a cocatalyst for the polymerization of olefins. According to the invention it has been possible to increase the activity of the catalyst composition by using a silanated support material, such as silanated silica, which is then treated with an organometallic or silicon compound before treatment with a transition metal compound. The silanated silica is preferably a silicon dioxide which has been heat-treated at 100-200 °C and thereafter treated with hexamethyldisilazane and contains carbon 3-6 %. The organometallic compound is preferably an aluminum alkyl compound, such as triethylaluminum, and the transition metal compound is preferably titanium tetrachloride.
Patent CA-2069246-C (CA)
Title: Vehicular radiator and module construction for use in the same
Inventor: HAASCH JAMES THOMAS
IPC: F28F9/26
Filed: 1992-05-22
Granted: 2003-12-02
Abstract: Difficulty in heat exchanger module replacement and the cost of plural manifolds in a modular heat exchanger useful in heavy duty vehicles or the like is avoided in a construction that includes an elongated manifold (20) having spaced interior inlet and outlet channels (84, 86) along with a plurality of spaced inlet and outlet ports (58, 70) in fluid communication with respective ones of the inlet and outlet channels (84, 86).      An elongated frame member (14) is spaced from and parallel to the manifold (22) and has a plurality of spaced retaining formations (42). A plurality of heat exchanger modules (12) are mounted between the frame member (14) and the manifold (20) in side by side relation and each module has spaced tanks (34, 36; 50, 52) with a plurality of finned tubes (30, 32) extending between and in fluid communication therewith. One tank (34, 36) has a mating retaining formation (40) for receipt within the retaining formation (42) in the frame member (14) while the other tank (50, 52) has inlet and outlet ports (62, 64) aligned with and in fluid communication with corresponding inlet and outlet ports (68 and 70) in the manifold (20). A baffle (60) is disposed in the tank (50, 52) between the inlet and outlet ports (62, 64) thereof.
Patent CA-2077965-C (CA)
Title: Process for the preparation of 4-hydroxy-3-[2h] furanones
Inventor: COHEN AMNON M
IPC: C07D307/60
Filed: 1992-09-10
Granted: 1997-04-08
Abstract: The invention is directed to a process for the preparation of 5-alkyl-4-hydroxy-3[2H]furanones and/or 2,5-dialkyl-4-hydroxy-3[2H]furanones, wherein each alkyl group independently has one to six carbon atoms, comprising; (a)  saponification of an ester selected from the group of 3,4-dihydroxyfurans substituted at the 2- and/or 5-position with one or two carbalkoxy groups, wherein each alkoxy group independently contains one to six carbon atoms, and optionally substituted at the 2- or 5-position with an alkyl group with one to six carbon atoms, or tautomeric forms or keto-enol isomers thereof,. (b)  subsequent treatment with one or two alkylation reagents which independently may have one to six carbon atoms (c)  subsequent recovery of the 5-alkyl-4-hydroxy-3[2H]furanones and/or 2,5-dialkyl-4-hydroxy-3[2H]furanones.
Patent CA-2083587-C (CA)
Title: Apparatus for measuring the flowrate of a fluid
Inventor: NISSEN PETER
IPC: G01F1/00
Filed: 1992-11-23
Granted: 1999-11-09
Abstract: Circuit for a device to measure the flowrate of electrically charged fluids consisting of a pipe section through which the fluid flows which contains at least two current sources connected to electromagnets, which generate a magnetic field which extends through the pipe section, and which contains for the measurement of the electrical potential due to the charge differential at least two electrodes, whose axes are connected by an imaginary line which extends through the fluid flow, and which electrodes are connected to a correction circuit which produces an output signal proportional to the flowrate which is only minimally influenced by the flow profile and/or the level of the fluid in the pipe section characterized by electromagnets which are excited from the current sources by different frequencies and that between the electrodes and the correction circuit are connected parallel to each other band pass filters corresponding to the different frequencies, and connected after these band pass filters are do rectifiers controlled by the different frequencies.
Patent CA-2089226-C (CA)
Title: Package, especially soft-cup pack for cigarettes
Inventor: FOCKE HEINZ
IPC: B65D85/10
Filed: 1993-02-10
Granted: 2005-05-03
Abstract: A package, especially a soft-cup pack for cigarettes is disclosed. An inner wrapping (12) of the soft-cup pack is provided with an opening and withdrawal aid. In the region of an end wall (15), a longitudinal tab (16) is folded out of the region of the end wall (15). The other longitudinal tab (17) serves as a closure tab for a withdrawal opening (24) which is formed in the central region of the end wall (15). The withdrawal opening (24) is enlarged because parts of side tabs (20, 21) can be moved into the open position together with the longitudinal tab (17). Additionally, the inner wrapping (12) is provided with a withdrawal aid which is effective in the region of the withdrawal opening (24), in particular with a lift-out strip (44) which is formed from the inner wrapping (12).
Patent CA-2096676-C (CA)
Inventor: RUF GUNTHER
IPC: B65H43/08
Filed: 1993-05-20
Granted: 2005-10-04
Abstract: A cutting-off device and at least one tear detector are provided for cutting a web of paper in a press end of a paper machine, in response to a tear in the web of paper in a single-tier dryer and, the tear of the web of paper being recognized via a tear signal and transmitted to the cutting-off device. The tear detector has a transmission/reception base unit, which, on the one hand, at the start of a production cycle, or whenever a tear in the paper web is detected, records and stores the spectrum of the existing shade of color of the corresponding dryer felt, and possibly updates the stored shade of color at the time of subsequent tears. On the other hand, upon a later tear in the paper web, the base unit compares the shade of color of the dryer felt at the existing tear and the previously stored shade of color.      If they match, the base unit activates the cutting-off device When (and only when) the stored shade of color of the dryer felt is recognized.
Patent CA-2099152-C (CA)
Inventor: CLEMENT JACK M
IPC: F04B39/10
Filed: 1993-06-25
Granted: 1996-12-03
Abstract: A hermetic compressor including a crankcase defining a cylinder. The crankcase has an annular recess formed in the discharge end thereof which defines a shoulder.  A cylinder head is disposed over the annular recess.  A discharge valve assembly is disposed in the annular recess and includes a valve plate disposed in the annular recess immediately adjacent the shoulder.  A valve plate wave ring is disposed at the outlet side of the valve plate and biases the valve plate against the shoulder.  A valve leaf disposed radially inward of the first wave ring overlies the discharge ports in the valve plate and has an outlet side facing the cylinder head.  A valve leaf wave ring is disposed radially inward of the valve plate wave ring at the outlet side of the valve leaf and biases the valve leaf against the valve plate.