baber/WOPTO huggingface dataset:
Patent CA-1308105-C (CA)
Title: 2h-1-benzapyran compounds
Inventor: BURRELL GORDON
IPC: C07D405/04
Filed: 1987-05-01
Granted: 1992-09-29
Abstract: Abstract Compounds of formula (I) and pharmaceutically acceptable salts thereof:                  (I) wherein:            Y is N or (when R3 is hydroxy, C1-6 alkoxy or C1-7 acyloxy) CH;   one of R1 and R2 is hydrogen or C1-4 alkyl and the other is C1-4 alkyl or R1 and R2 together are C2-5-polymethylene;            R3 is hydrogen, hydroxy, C1-6 alkoxy or C1-7 acyloxy;            R4 is a C3-8 cycloalkyl group or a C1-6 alkyl group optionally substituted by a group R7 which is hydroxy, C1-6 alkoxy, amino optionally substituted by one or two C1-6 alkyl groups; C1-7 alkanoylamino, C3-8 cycloalkyloxy, C3-8 cycloalkylamino, or 1,3-dioxo-2-isoindoline;   when Y is N, R5 is hydrogen, C1-6 alkyl optionally substituted by halogen, hydroxy, C1-6 alkoxy, C1-6 alkoxycarbonyl, carboxy or amino optionally substituted by one or two independent C1-6 alkyl groups, or C2-6 alkenyl, amino optionally substituted by a C1-6 alkyl, C3-8 cycloalkyl or C1-6 alkenyl group or by a C1-6 alkanoyl group optionally substituted by up to three halo atoms, by a phenyl group optionally substituted by C1-6 alkyl, C1-6 alkoxy or halogen, or aryl or heteroaryl, either being optionally substituted by one or more groups or atoms selected from the class of C1-6 alkyl, C1-6 alkoxy, hydroxy, halogen, trifluoromethyl, nitro, cyano, C1-12 carboxylic acyl, or amino or aminocarbonyl optionally substituted by one or two C1-6 alkyl groups and R6 is hydrogen or C1-6 alkyl, or R5 and R6 together are -CH2-(CH2)n-Z-(CH2)m- wherein m and n are 0 to 2 such that m + n is 1 or 2 and Z is CH2, O, S or NR wherein R is hydrogen, C1-9 alkyl, C2-7 alkanoyl, phenyl C1-4-alkyl, napthylcarbonyl, phenylcarbonyl or benzyl-carbonyl optionally substituted in the phenyl or naphthyl ring by one or two of C1-6 alkyl, C1-6 alkoxy or halogen; mono- or bi-cyclic- heteroarylcarbonyl;            When Y is CH, R5 is NR8R9 wherein R8 and R9 are independently C1-6 alkyl, R8 is hydrogen and R9 is C1-6 alkyl or R8 and R9 together are C4-5 polymethylene; or R6 and R8 together are -(CH2)p- wherein p is 2 or 3, and R9 is hydrogen or C1-6 alkyl; or R5 is CH2R10 wherein R10 is hydrogen or C1-5 alkyl; or R6 and R10 are -(CH2)q- wherein q is 2 or 3;            X is oxygen or sulphur; or R5, R6, X and Y (when N) together are tetrahydro-isoquinolinone or tetrahydroisoquinolinthione, optionally substituted in the phenyl ring as defined for R above;     the nitrogen-containing group in the 4-position being trans to the R3 group when R3 is hydroxy, C1-6 alkoxy or C1-7 acyloxy; having K+ channel activator activity, processes for their preparation and their use as pharmaceuticals.
Patent CA-1281083-C (CA)
Title: Pulsed arc welding
Inventor: OGILVIE GRAEME J
IPC: B23K9/09
Filed: 1987-06-04
Granted: 1991-03-05
Abstract: Abstract A pulsed arc welding system comprises a current pulse generating  circuit  and  a  background  current  generating curcuit  including  a  DC  power  supply  circuit  adapted  for connection to a load via an electrode wire.  A switch causes current  pulses  generated  by  the current pulse  generating circuit to be applied to the load.  The voltage applied by the circuits  across  the  load  is detected  and  the  switch controls   the   pulse repetition   rate   to   maintain   a substantially constant predetermined arc voltage across the load.   The  invention  is  characterized  by  determining  the lowest  arc  voltage  that  occurs  in  a  predetermined  time period  immediately  preceding  the  onset  of  each  current pulse.   This  arrangement  minimises  problems  that  have occured  in  the  past  and  avoids  errors  due  to  short circuiting.
Patent CA-1286348-C (CA)
Title: Low power electric speed reducer, particularly for a home trainer
Inventor: CHARBONNIER MARC
IPC: A63B21/00
Filed: 1987-07-03
Granted: 1991-07-16
Abstract: LOW POWER ELECTRIC SPEED REDUCER,  PARTICULARLY                 FOR A HOME TRAINER            ABSTRACT    An  electric  speed reducer of low power  designed essentially  for equipping home trainers  comprises  an armature rotor composed  of two parallel  discs  of mag-netic material fast to the same shaft.  The  shaft 1 itself  mounted on  a  suitable  frame through  bearings. The inductor stator is  arranged  so as to  be mountable radially removably between the  two discs  and comprises for this purpose a single pair of cores of cylindrical  or prismatic material  whose generators are  parallel with the  axis  of the speed  reducer and of which only the first is surrounded by a coil of electric wire.
Patent CA-1295592-C (CA)
Inventor: SAITO YOSHIYUKI
IPC: F04B27/10
Filed: 1987-07-16
Granted: 1992-02-11
Abstract: WOBBLE PLATE TYPE COMPRESSOR WITH IMPROVED ROTATION-PREVENTING MECHANISM          ABSTRACT       An improved wobble plate type refrigerant compressor in which the tendency of the wobble plate to rotate is reduced. The wobble plate is prevented from rotating and is allowed to nutate by a rotation-preventing mechanism which includes a pair of bevel gears which are coupled together. One bevel gear is located within the wobble plate and the other bevel gear is supported on the cylinder block. A steel ball is located between the bevel gears. The improvement is achieved by locating the bevel gear within the wobble plate so that the connecting rods are inclined to the axis of the cylinders. This arrangement is achieved by locating the bevel gear so that a line connecting the center of the bevel gear and including a point on the edge of the bevel gear located exactly between two teeth of the bevel gear includes a third point near the edge of the wobble plate which is located between receiving portions of the wobble plate but which is not located at the center between the two receiving portions. Rather, this point is shifted within a range of 5° in the rotational direction along the edge of the wobble plate from the centrally located point. The resulting construction reduces the rotational force created at the point of connection of the two bevel gears and thus increases the durability of the rotation-preventing mechanism and reduces vibration and noise.
Patent CA-1336692-C (CA)
Inventor: NORGARD MICHAEL V
IPC: C12N1/21
Filed: 1987-09-23
Granted: 1995-08-15
Abstract: Monoclonal antibodies directed against the 47 kDa major outer membrane surface immunogen of virulent Tre-ponema pallidum were used to select E. coli recombinant clones expressing the 47 kDa immunogen.  The phenotype of the clones was dependent on the presence of recombinant plasmid in the host cell.  Southern hybridization revealed that the cloned T. pallidum DNA sequence was an accurate representation of the T. pallidum genomic DNA arrangement. Purified IgG from rabbits experimentally infected with T. pallidum and human secondary syphilitic sera specifically reacted with the clones while normal human serum or IgG from normal rabbit serum did not.  Results of Southern hybridization indicated that a homologous 47 kDa immunogen gene was absent in at least 4 species of nonpathogenic treponemes tested, as well as from total rabbit genomic DNA.  Rabbit anti-T. phagedenis biotype Reiter (treponemal nonpathogen) antiserum and a monoclonal antibody directed against a "common" treponemal determinant were unreactive with the clones.  Western blotting and radioimmunoprecipi-tation experiments with specific monoclonal antibodies revealed that the recombinant (E. coli) and native (T. pallidum) forms of the antigen had identical electro-phoretic mobilities.  The availability of recombinant 47 kDa immunogen provides a new opportunity for biochemical analysis of the protein, structure-function studies, examination of its role in microbial pathogenesis, and assessment of its diagnostic and vaccinogenic potentials.
Patent CA-1282478-C (CA)
Title: Arrangement for testing packet switching networks
Inventor: STEWART GILBERT M
IPC: H04L12/56
Filed: 1987-09-30
Granted: 1991-04-02
Abstract: ARRANGEMENT FOR TESTING PACKET         SWITCHING NETWORKS            Abstract A packet network test arrangement where a test packet is transmitted from a test source to a test destination via successive nodes of the packet network. Any node that fails to receive acknowledgment within a predetermined time of transmitting the test packet to a subsequent node responds by transmitting information to the test source concerning the failure and particularly defining the involved nodes. Accordingly, a single test can be used advantageously both to detect faults and to localize such faults between two network nodes. The test arrangement also provides for the loop-around of test packets received at the test destination thus enabling the test source to verify successful packet communications.
Patent CA-1279883-C (CA)
Title: Pipe handling apparatus
Inventor: SLETTEDAL PER
IPC: E21B19/15
Filed: 1987-10-21
Granted: 1991-02-05
Abstract: Abstract of the Disclosure A pipe handling apparatus is disclosed, which is adapted for automated drilling operations.  Drill pipes are manipulated between substantially horizontal and vertical positions, and the apparatus is used with a top mounted drilling device which is rotatable about a substantially horizontal axis.  The apparatus comprises a strongback provided with clamps to hold and manipulate pipes.  The strongback is at one end portion rotatably connected to the same axis as the drilling device.  The strongback moves up or down with the drilling device.  A brace unit is attached to the strongback to be rotatable about a second axis spaced apart from said first axis.  The brace unit has one end portion rotatable about a third axis.
Patent CA-1318063-C (CA)
Inventor: SAKAI TOSHIYUKI
IPC: C08G61/12
Filed: 1987-11-24
Granted: 1993-05-18
Abstract: ABSTRACT OF THE DISCLOSURE         A highly conductive polymer composition can be obtained by doping a neutralized conductive polymer having a .pi.-electron conjugated structure with an anionic   polymer     electrolyte.  The conductive polymer composition is stable for a long period of time, and the content of the dopant in the polymer composition can be freely controlled.  A process for producing the polymer composition is also disclosed.
Patent CA-1278809-C (CA)
Inventor: WALLGREN LINUS E
IPC: H05K3/34
Filed: 1988-01-15
Granted: 1991-01-08
Abstract: ABSTRACT OF THE DISCLOSURE        A heater unit and control circuitry therefor, the heater unit typically being employed as a preheater or primary heater for the installation and removal of electronic components from a PCB or the like and having various means for accommodating (a) an uneven surface or the presence of other components on the underside of the board or (b) an unlevel board.  Moreover, a heater unit for sequentially providing preheat and primary heat from different zones of the heater is disclosed.  A probe for use with the heater for sensing the temperature at various points on the board is also disclosed.  The circuitry is characterized by ease of calibration of the heater temperature, the temperature transducing circuits, and the temperature setting circuits thereof.  Moreover, circuitry is provided to insure the same voltage out of each input source in response to the input source measuring or setting a common temperature.
Patent CA-1291591-C (CA)
Title: Vinylidene fluoride-acrylic acid ester copolymer, process for producing the same and composition containing the same
Inventor: MIYABAYASHI TOSHIO
IPC: C08F214/22
Filed: 1988-01-19
Granted: 1991-10-29
Abstract: ABSTRACT OF THE DISCLOSURE         A substantially random, linear vinylidene fluoride-acrylic acid ester copolymer comprising:         (A) 5-85% by weight of a vinylidene fluoride unit, (B)  15-95% by weight of at least one unit selected from the group consisting of an alkyl acrylate unit and an alkoxy-substituted alkyl acrylate unit, and (C)  optionally 10% by weight or less, based on the total weight of (A), (B) and (C), of a crosslinking monomer unit, and having an intrinsic viscosity of 0.01-10 dl/g as measured at 30°C in N,N-dimethylformamide.          Said copolymer has not only excellent heat resistance, ozone resistance and sour gasoline resistance but also excellent resistance to gasoline permeation.
Patent CA-1310158-C (CA)
Title: Spring closing device for doors or other similar structures
Inventor: FARGNIER JEAN A
IPC: E05F1/12
Filed: 1988-02-04
Granted: 1992-11-17
Abstract: Spring closing device for door or the like, comprising at least two hinges, each one comprising two components articulated on an axis and one of which, known as the mobile component, is fixed on the door and the other of which, known as the fixed component, is fixed on the post of this door, whereby a flexible spring torsion bar is also provided between this door and its post so as to bring it back automatically into the closed position, a device characterized in that the elastic component comprises a steel spring torsion bar (6) connecting the fixed component of a hinge to the mobile component of another hinge.
Patent CA-1287930-C (CA)
Title: Method and apparatus for transmitting information via  a bus system
Inventor: LUNDH PETER C B
IPC: H04L12/54
Filed: 1988-02-26
Granted: 1991-08-20
Abstract: ABSTRACT OF THE DISCLOSURE      A method and apparatus for transmitting message information between a plurality of transmission units includes a plurality of data transmission channels on a bus system which are each permanently assigned to a respective transmission unit and adapted to transmit message information only to the transmission unit to which it is assigned from any one of the other transmission units.  In addition, a plurality of status transmission channels on the bus system are each assigned to one of the transmission units and adapted to transmit status information from any one of the transmission units.  The status information indicates whether the data transmission channel assigned to the same transmission unit as the respective status transmission channel is engaged or unoccupied for transmitting message information.  The method and apparatus are particularly suited for switching nodes in packet-switched communications.
Patent CA-1308908-C (CA)
Inventor: FLOOD RONALD
IPC: G09F15/00
Filed: 1988-03-11
Granted: 1992-10-20
Abstract: ABSTRACT OF THE DISCLOSURE A temporary display booth is constructed from a kit of parts. The kit includes a number of elongate V-shaped components of substantially identical shape and size. Each component has a steel base rod, a pair of perforated metal panels of generally trapezoidal shape extending away from the base rod, and a pair of peripheral edge rods attached to the panels at peripheral edges distant from the base rod. Opposing ends of the three rods are formed with T-shaped connectors which co-operate with disk-shaped connectors formed with radially-directed slots to releasably join the panels at predetermined angles. Temporary ceilings, walls and the like of varying shape and size can be conveniently assembled. Additional components of generally planar, trapezoidal shape also carrying T-shaped connectors, are used to complete end surfaces of such structures or produce more complex structures.
Patent CA-1338387-C (CA)
Title: Vector excitation speech or audio coder for transmission or storage
Inventor: DAVIDSON GRANT
IPC: G10L19/12
Filed: 1988-04-05
Granted: 1996-06-11
Abstract: A  vector  excitation  coder  efficiently  com-presses vectors by using an optimum codebook designed off line, using an initial arbitrary codebook and a set of speech training vectors exploiting codevector sparsity  (i.e.,  by making  zero  all but a selected number of samples of lowest amplitude in each of N codebook vectors).   A fast-search method selects  a number Nc of good excitation vectors from the code-book, where Nc is much smaller than N, and uses only the Nc vectors in an exhaustive search for the best match between a  perceptually weighted  input  vector Zn~ and an estimate Zn derived from a codebook vector processed through long-term and short-terms filters, and a perceptual weighting filter.   The zero input response of these cascaded filters is calculated and subtracted from an input speech vector sn after per-ceptual weighting to produce a vector rn.  The code-book search operation is performed using      , by calculating the numerator of a fast inner product and calculating the denominator by a fast inner prod-uct for each codebook vector cj, computing the right hand side of the equation once per frame,  and then cross multiplying the numerators and denominators to determine if N2/D2 is less than N1/D1 by determining if N1D2>N2D1.  If not N2 and D2 replace N1 and D1 in registers En and Ed.
Patent CA-1301092-C (CA)
Title: Fan clutch
Inventor: HALL JOHN L
IPC: F16D25/0632
Filed: 1988-04-12
Granted: 1992-05-19
Abstract: ABSTRACT OF THE DISCLOSURE        A clutch drive for a vehicle engine cooling fan includes a pulley portion which is driven by the vehicle engine, a fan plate which rotatably mounts the engine cooling fan, and a pressure plate which engages the fan plate to drive the latter when the clutch is engaged. Torque transmission from the pulley to the pressure plate is through a series of circumferentially spaced coiled springs which also yieldable urge the pressure plate into driving engagement with the fan plate. A spring stabilizer defines a circumferentially extending cavity which receives several coils of the spring to stabilize the latter and to prevent displacement of the coils circumferentially with respect to each other during engagement and disengagement of the clutch.  The stabilizer also slidably engages both the pressure plate and the pulley, thereby taking up clearances between the various members to prevent rattling and also to assist in the transmission of torque to the pressure plate.
Patent CA-1313381-C (CA)
Title: Use of a fatty oil ex helianthus annuus for the production of a product containing fatty acid monoglycerides
Inventor: EIERDANZ HORST
IPC: C11C3/06
Filed: 1988-05-09
Granted: 1993-02-02
Abstract: ABSTRACT OF THE DISCLOSURE       Fatty oil ex Helianthus annuus containing 78 to 92% by weight oleic acid and 2 to 10 by weight linoleic acid, based on total fatty acids present, is used for the production of a product containing fatty acid monoglycerides, with elimination of enrichment steps in respect of the oleic acid content, by transesterification in the presence of glycerol or by fat splitting and reaction of the split fatty acid obtained with glycerol.  The fatty acid monoglycerides product thus obtained show surprising oxidation stability and excellent emulsifier properties.
Patent CA-1329111-C (CA)
Inventor: SLOCUM GERALD F
IPC: B23D61/02
Filed: 1988-05-10
Granted: 1994-05-03
Abstract: ABSTRACT OF THE DISCLOSURE      A curcular saw blade is divided into a plurality of circumferential sections each including a number of cutting teeth provided along the circumferential edge of the saw blade. Between each pair of teeth, a gullet is formed having a depth in the radial direction of the blade.  The distance between each pair of cutting teeth defines a pitch.  The depth of the gullets and the pitch of successive teeth of the saw blade is different from one another.
Patent CA-1312779-C (CA)
Title: Sabot projectile containing a projectile core and a sabot jacket
Inventor: KATZMANN HARALD
IPC: F42B14/06
Filed: 1988-05-17
Granted: 1993-01-19
Abstract: INVENTOR:   HARALD KATZMANN     INVENTION: SABOT PROJECTILE CONTAINING A PROJECTILE CORE AND A            SABOT JACKET     ABSTRACT OF THE DISCLOSURE             For the projectile core of a sabot projectile, it is desired to use very brittle material in consideration of the strived for effect in the target.  It has been found that a projectile core formed of a brittle material already tends to break while being delivered to the firing weapon.  To avoid this danger,  the brittle part of the projectile core is prestressed or pre-biased by a tie rod.  The projectile core preferably  consists  of  three  components,  wherein  the intermediate component is prestressed and the contact surfaces between these three components are substantially conically structured.
Patent CA-1331211-C (CA)
Inventor: HANDA YASUNOBU
IPC: A61B5/296
Filed: 1988-06-01
Granted: 1994-08-02
Abstract: ABSTRACT OF THE DISCLOSURE            The present invention relates to an electrode which is implanted in a living body, and which is used as an electrical stimulation system for the functional training or restoration of paralyzed muscles, and for the measurement of electrical signals of the living body, and the like.  The electrode comprises:  a core comprising a plurality of infinitesimal stainless steel wires of over 180 kg/mm2 in tensile strength and under 25 microns in diameter; and a resin coat provided on the surface of the core, made of a resin compatible with the living body.  According to one aspect of the invention, the diameter of the electrode is under 0.3 mm; the electrode is provided with a spirally coiled part along its longitudinal direction; the core is stranded in one direction; and above mentioned coiled part is coiled in the direction opposite to the stranding direction of the core.
Patent CA-1332789-C (CA)
Inventor: CAMERON ANDREW M
IPC: C22B4/00
Filed: 1988-07-11
Granted: 1994-11-01
Abstract: Magnesium is produced by the metallothermic reduction of MgO in a molten slag bath comprised of MgO, Al2O3 and CaO together with oxide formed from the reducing metal. The composition of the slag is controlled during at least a first stage of the reduction so that it is wholly within the periclased region of its phase diagram and, at least in the surface region, has a substantially constant liquidus temperature. The surface region of the slag is maintained by direct heating (e.g. by a plasma) at or close to the liquidus temperature.
Patent CA-1286561-C (CA)
Title: Solid fuel burning stove apparatus
Inventor: STONER JAMES L
IPC: F24B1/26
Filed: 1988-07-13
Granted: 1991-07-23
Abstract: ABSTRACT This apparatus relates to stoves, to devices for heating that use sawdust, ground corn cobs and other suitable materials gravity fed through a conical truncated feeder-hopper into a firebox. The heat generated raises the temperature of a tubular cylindrical structure that contains or encloses the firebox and directs gaseous by-products along its longitudinal axis to an upturned, upwardly disposed second terminal end that effects a ninety degree elbow turn, becoming a flue extension. A variety of secondary devices may be affixed to the basic heat generator or stove to provide for a variety of applications.
Patent CA-1283702-C (CA)
Title: Seal for single wire o _sensor
Inventor: BARBIERI MICHAEL G
IPC: G01N27/407
Filed: 1988-08-11
Granted: 1991-04-30
Abstract: ABSTRACT OF THE INVENTION An oxygen sensor (10) having a electrolyte sensor (40) located in a metal shell (14) and a insulating terminal (102) located in a metal sleeve (72).  The metal sleeve (72) is secured to the metal shell (14) to define a reference chamber (68) adjacent the interior of the electrolyte sensor (46).  A closed end (74) on the sleeve (72) has a plurality of openings (76, 76'...76n) surrounding a central opening (78).  A porous filter (90) has a base (92) that is continually urged against end (74) by the action of spring (118) on terminal (102).  A grommet (124) located in the central opening (78) has a cylindrical body with a flange (136) that radially engages filter (90) and a series of lands (132, 132' or 132n) that form a plurality of sealing surfaces on lead (12) that connects the electrolyte sensor (46) with a controller.  Changes in temperature which cause the components of sensor (10) to expand and contract at different rates are compensated by the grommet (124) and filter (90) to assure that water does not enter the reference chamber (68) through the openings in the closed end (74).