baber/WOPTO huggingface dataset:
Patent CA-1284837-C (CA)
Title: Audio transducer
Inventor: BURTON PAUL
IPC: H04R7/24
Filed: 1987-06-18
Granted: 1991-06-11
Abstract: ABSTRACT     An audio transducer device capable of acting as a full range speaker which achieves the propogation of a peaked wavefront from the  diaphragm instead of generating a substantially planar wavefront as in  the case of the common speaker construction utilizing a diaphragm  driven as a piston.  The speaker has a frame with a central open area  in which is supported a substan-tially planar, thin, flexible film  forming the diaphragm. The diaphragm is driven by a driver which  imparts motion to the diaphragm at a small source area preferrably  centrally disposed of the diaphragm, the motion being imparted in a  direction normal to the plane of the diaphragm so that ripples radiate from the drive area and travel at the same time across the flexible  diaphragm, one behind the other, towards the frame. The drive area is  small relative to the overall diaphragm and may be a point source or a  line source.  The rest of the diaphragm is driven by the central  moving portion, endowing it with a built in time delay, much in the  same manner ripples move out in a still pond when a pebble is  thrown into it.  Because of the time delay involved in spreading the  energy across the diaphragm, the wavefront radiated by the speaker gets a head start at the centre and lags towards  the edges.  The result is that of a spreading spherical wave front for a  point source and a cylindrical wave front from a line source, and allowing a large diaphragm to behave as a small virtual audio source.  This ensures excellent treble dispersion from a diaphragm capable of substantial bass response.  In each case, the full range transducer requires no crossover, equalization or time delay circuits.  The linear coil in the line source arrangement presents an amplifier with the ideal purely resistive load, with no substantial inductance or reactance.  Similarly, the point source can be readily designed to present a simple load with only a mild inductive characteristic.
Patent CA-1301064-C (CA)
Title: Immunomodulating compositions and their use
Inventor: GEFTER MALCOLM L
IPC: A61K39/00
Filed: 1987-06-30
Granted: 1992-05-19
Abstract: IMMUNOMODULATING COMPOSITIONS         AND THEIR USE                 ABSTRACT OF THE DISCLOSURE        Novel methods or compositions are provided for modulating the immune system, so as to be able to se-lectively stimulate or inactivate lymphocytes in rela-tion to a particular transplantation antigen context. Particularly, mixtures may be employed associated with the more common transplantation antigens of a host pop-ulation.  In this manner, a large number of people can be treated, for example, by immunization, stimulation of particular T-cells or B-cells in relation to a path-ogenic invasion or other aberrant state, e.g. neopla-sia, treatment of autoimmine diseases, and the like. Particularly, the compositions may involve an oligopep-tide involving as a first region a consensus sequence and an epitope or the first region may be joined to a second region comprising an antibody target sequence which is capable of competing with an epitopic site of an antigen of interest.
Patent CA-1328796-C (CA)
Inventor: MEYERSON BERNARD S
IPC: C30B29/06
Filed: 1987-08-07
Granted: 1994-04-26
Abstract: ABSTRACT OF THE DISCLOSURE          A method and apparatus for depositing single crystal, epitaxial films of silicon on a plurality of substrates in a hot wall, isothermal deposition system is described.  The deposition temperatures are less than about 800°C, and the operating pressures during deposition are such that non-equilibrium growth kinetics determine the deposition of the silicon films.  An isothermal bath gas of silicon is produced allowing uniform deposition of epitaxial silicon films simultaneously on multiple substrates.  This is a flow system in which means are provided for establishing an ultrahigh vacuum in the range of aobut 10-9 Torr prior to epitaxial deposition.  The epitaxial silicon layers can be doped in-situ to provide very abruptly defined regions of either n- or p-type conductivity.
Patent CA-1292449-C (CA)
Title: Foot-operated press
Inventor: TOISHI YOSHIYUKI
IPC: B30B1/12
Filed: 1987-08-13
Granted: 1991-11-26
Abstract: ABSTRACT OF THE DISCLOSURE     A foot-operated press includes a ratchet mechanism operatively connecting a foot pedal and a punch of the press for preventing backward movement of the foot pedal until after the punch has fully been lowered to ensure that a pair of fastener elements can be assembled together in properly clinched condition, with a garment fabric disposed between the two fastener elements.
Patent CA-1304720-C (CA)
Title: Combine head carrier for transport vehicle
Inventor: BRUNS WESLEY W
IPC: B60P3/06
Filed: 1987-08-18
Granted: 1992-07-07
Abstract: ABSTRACT OF DISCLOSURE       A carrier mounted on a wagon running gear supports a combine head for transport to a desired location.  The carrier has a pair of support assemblies attached to the wagon bolsters and a longitudinal support member.  Each support assembly has a back stop and arm adjustably mounted on a beam.  The support member is attached to each arm.  The combine head rests on the support member and back stops.
Patent CA-1298060-C (CA)
Title: Method and apparatus for coating soot on a melt contact surface
Inventor: WAKU YOSHIHARU
IPC: B29C33/58
Filed: 1987-11-25
Granted: 1992-03-31
Abstract: METHOD AND APPARATUS FOR COATING SOOT ON          A MELT CONTACT SURFACE     ABSTRACT OF THE DISCLOSURE      A method of coating on a melt contact surface such as that of an injection sleeve for casting, a plunger end face or a mold cavity comprises a step of charging the soot and the melt contact surface with opposite electrical polarities to thereby cause an electro-deposition of the charged soot on the melt contact surface.  A preferred apparatus for the soot coating comprises means for producing an air stream surrounding a combustion gas stream including the soot and forming an air curtain for preventing the sprayed soot from scattering.
Patent CA-1276044-C (CA)
Title: Personal dosimeter having a volume of gas atop an integrated circuit
Inventor: UBER ARTHUR E III
IPC: G01T1/185
Filed: 1987-12-07
Granted: 1990-11-06
Abstract: Abstract A dosimeter that includes tissue equivalent bubbles of plastic defining volumes of gas to be ionized by radiation.  One or more integrated circuits (ICs) are disposed below the volumes of gas and a collecting electrode on the IC is in direct contact with the gas.  Circuitry for generating an electric field within the volume of gas moves the ions therein to the collecting electrode.  The collecting electrode is part of an amplifying circuit disposed within the IC.  The output from the amplifier is representative of the collected ions and therefore representative of the radiation.  The signal from the amplifier is sent to an interface which conditions, buffers and stores the signal.  The radiation dose and dose rate are computed in the interface.  A communications section transfers that data from the dosimeter upon receipt of an externally generated data transfer command.  A separate calibration and display unit calibrates the dosimeter by controlling the conditioning of the signal.
Patent CA-1324788-C (CA)
Title: Pyrimidine derivatives
Inventor: BOZSING DANIEL
IPC: C07D235/02
Filed: 1987-12-30
Granted: 1993-11-30
Abstract: PYRIMIDINE DERIVATIVES                 Abstract The compounds of the general Formula I                                           (I) and pharmaceutically acceptable acid addition salts and hydrates thereof possess useful immunostimulant properties and can be used in therapy.      In the general Formula I          A     stands for -CH2-CH2-, -CH2-CH2-CH2-, -CH2-CH2-CH2CH2-or -CH=CH-:          R4    is hydrogen, C1-4 alkyl or optionally substituted phenyl; r     is 0, 1, 2, 3 or 4;          R1    stands for hydrogen or C1-5 alkanoyl;          R2    represents hydrogen, C1-5 alkanoyl or a group of the general Formula (a)       (a) wherein R   stands for hydrogen, C1-4 alkyl, C2-4 alkenyl, phenyl or phenyl-C1-3 alkyl and R3 stands for hydrogen.        The compounds of the general Formula I can be prepared by reacting a 2-mercapto-4,6-diamino-pyrimidine of the general Formula II                                       (II) with a dihalo compound of the general Formula III                                             (III) (wherein Y and Z are halogen).
Patent CA-1313498-C (CA)
Title: 3'-azido-2', 3'-dideoxyuridine anti-retroviral composition
Inventor: CHU CHUNG K
IPC: C07H19/10
Filed: 1988-01-27
Granted: 1993-02-09
Abstract: 3'-AZIDO-2',3'-DIDEOXYURIDINE ANTI-RETROVIRAL COMPOSITION           Abstract Compositions for the treatment  of AIDS  and ARC having the following compound as an active ingredient:                                where  R1   is  OH,   monophosphate,  diphosphate,  or triphosphate; or a  pharmacologically  acceptable salt thereof.      The  primary  advantage  of this compound is its highly selective  anti-retroviral  activity,  i.e., it significantly decreases  viral replication as measured as reverse transcriptase activity  while demonstrating orders of magnitude less cytotoxicity than other anti-viral compounds such as AZT.      In  a  preferred  embodiment,  the  compound  is present  in  an  amount  sufficient to inhibit the HIV reverse transcriptase activity  but  not significantly inhibit human  DNA polymerase activity.  Also included within the scope of this invention are 3'-azido-2',3'-dideoxyuridine  5'-mono-,  di-,  and  triphosphate and compositions containing these compounds  as the active agent.
Patent CA-1315457-C (CA)
Title: Catalyst compositions and olefin/co copolymerization process
Inventor: DRENT EIT
IPC: C08G67/02
Filed: 1988-02-02
Granted: 1993-03-30
Abstract: A S T R A C T      CATALYST COMPOSITIONS AND OLEFIN/CO       COPOLYMERIZATION PROCESS       Novel catalyst compositions, comprising a) a palladium compound, b) an anion of an acid with a pKa of less than 4, with the proviso that the acid is not a hydrohalogenic acid, and c) a triphenylphosphine wherein at least one of the phenyl groups bears at least one substituent in a position ortho in respect to phosphorus.             ML.T128
Patent CA-1315861-C (CA)
Title: Modular observation instrument with range finder
Inventor: BRUN ROBERT
IPC: G02B23/04
Filed: 1988-01-18
Granted: 1993-04-06
Abstract: On the basis of observation field glasses with incorporated infrared range finder, a modular observation instrument is described, in which the infrared optical path of the range finder is guided over the same optical elements , which determine the optical path of the field glasses. Into the instrument casing is additionally integrated at least one direction meter and at least one computer module for the functional control of the measuring processes. There are also means for simultaneously triggering the range finder and the direction meter, the optical path of the visible light remaining undisturbed for the field glasses function during said measuring process, so that the visual representation of the measured object is also unimpaired during the measuring phase. The IR-light is separated from the common optical path directly upstream of the field glasses eyepieces with tile aid of beam splitters. This leads to an effective protection of the eyes, whilst permitting an optimum use of the optical components. The result is a handy measuring instrument for precise three-dimensional tracking of objects, which can be simultaneously visually observed in an undisturbed manner.
Patent CA-1300844-C (CA)
Title: Building panel and method of fabrication
Inventor: SLOCUM DONALD H
IPC: E04B2/02
Filed: 1988-03-30
Granted: 1992-05-19
Abstract: Abstract of the Disclosure A building panel of laminated construction having a flat, four-sided polygonal shaped hardboard sheet, to one surface of which is bonded a thin, flat, plastic sheet having weather resistant properties, and a rigid foam plastic layer having heat insulating properties bonded to the other surface of the hardboard sheet.  The foam plastic layer has a tapered shape in cross section with the taper extending from a lower edge portion to a narrow upper edge portion.  The hardboard and plastic sheets have an integral flanged lower edge portion in partial abutment with the lower edge portion of the foam plastic layer.  A notch is formed in the lower edge portion of the foam plastic layer, adjacent the flanged lower edge portion, which notch is constructed and arranged to receive the upper edge portion of an adjacent lower building panel and thereby anchor the lower edge portion of the building panel and provide a seal at the joint.  The method of fabrication includes the steps of forming the integral flanged lower edge portion by providing a V-shaped groove spaced from and parallel to the lower edge of the hardboard to a depth substantially at the surface of the plastic sheet without penetration of the latter and folding along the apex of the groove so as to bring the surfaces of the groove into abutment, the plastic sheet at the apex serving as a hinge.
Patent CA-1294597-C (CA)
Inventor: LINN THOMAS D
IPC: F16M1/08
Filed: 1988-04-06
Granted: 1992-01-21
Abstract: ABSTRACT      A structural element for a precision linear motion system is provided which is extremely light in weight when compared to cast iron structural components yet provides the necessary rigidity and stability.  The structural element is constructed  from at  least  one  sheet  of  sheet material sheared and bent to form the side walls of the structural element which run parallel to a longitudinal axis of the structural element.  End surfaces of the structural elements are formed by a flat piece of sheet metal having a shape matching  the  shape  of  the  side walls  and having  side sections each of which is spot welded to the inside side surfaces of the side walls.  Baffles, identical in shape to the end surfaces, are positioned at spaced locations in the longitudinal direction of the structural element.    The components of a way system are accurately mounted in a precise alignment by placing the components on layers of an epoxy material which has a high compressive modulus when cured and low shrinkage while curing.  The layer of epoxy material, in turn, is placed on an exterior surface of one of the walls of the structural element.   The use of the epoxy material avoids uneven mating of the components.
Patent CA-1297433-C (CA)
Title: Spiramycin resistance-conferring cloning vectors
Inventor: RICHARDSON MARK A
IPC: C12N15/90
Filed: 1988-04-11
Granted: 1992-03-17
Abstract: Abstract novel gene conferring resistance to spiramycin in Streptomyces and related organisms was cloned from a genomic library of Streptomyces ambofaciens DNA.  A thirty-one Kb fragment of S. ambofaciens DNA surrounding the spiramycin-resistance gene was isolated from this library on a cosmid designated pKC592.  The novel spiramycin-resistance gene can be isolated on an ?2.9 Kb BamHI fragment by subcloning restriction fragments obtained from the pKC592 insert DNA.  This BamHI fragment contains all of the information required for the expression of the spiramycin resistant phenotype in Streptomyces.   Vectors and transformants containing the novel spiramycin resistance gene are provided.
Patent CA-1303970-C (CA)
Title: Method and apparatus for perforating well bores using differential pressure
Inventor: GEORGE FLINT R
IPC: E21B43/1185
Filed: 1988-04-20
Granted: 1992-06-23
Abstract: ABSTRACT        A method and apparatus for perforating oil well casing in a well bore, with particular advantage in highly deviated well bores.  The perforating guns are run into the well bore using the production tubing.  A sliding sleeve is connected in the tubing above the guns and a packer is run in for setting above the sliding sleeve and guns.  The assembly is run into the well bore until the guns extend into the highly deviated portion of the bore where the well casing is to be perforated.  The packer is set into place, isolating that portion of the well bore below the packer from that portion above the packer, and the sliding sleeve is opened using a wireline or other means.  The well bore below the packer is pressurized through the tubing to ensure that the packer is properly set,  The pressure is then allowed to bleed off and the sliding sleeve is closed.  The guns use a differential pressure-actuated firing head which is actuated upon a predetermined differential pressure between the production tubing bore and the annulus between the tubing and the casing.  The invention provides the capability of perforating well casing using relatively low values of actuating pressure, providing greater control over perforating conditions such as underbalance.
Patent CA-1310954-C (CA)
Inventor: DRENT EIT
IPC: C07C53/122
Filed: 1988-04-25
Granted: 1992-12-01
Abstract: A B S T R A C T            PROCESS FOR THE PREPARATION OF CARBOXYLIC ACIDS                     OR OF ESTERS THEREOF    Process for the preparation of carboxylic acids or of esters thereof by contacting an olefinically unsaturated compound with CO in the presence of water or an alcohol, respectively, and of a catalytic system prepared by combining a ruthenium compound and a compound having a non-coordinating anion of an acid with a PKa below 0.5; and catalytic systems comprising a ruthenium compound and a salt having a non-coordinating anion of an acid of a PKa below 0.5.
Patent CA-1297175-C (CA)
Title: Individual identification system
Inventor: HUGELMANN DENIS
IPC: G07F7/10
Filed: 1988-05-25
Granted: 1992-03-10
Abstract: Automatic person identification system. The person wears a bracelet (2) with a microprocessor (5). A random signal is sent to the microprocessor (5), which codes is according to two coding keys, one personal and one renewable, and returns the coded signal. The person is identified by decoding. The bracelet (2) is provided with a fibre optic (16). Opening of the fiber optic prevents light from reaching a cell (14) and deprograms the microprocessor (5). Application to automatic access systems and to servicing on computer terminals.
Patent CA-1296237-C (CA)
Title: Slow opening and fast closure gas valve
Inventor: DIETIKER PAUL
IPC: F16K31/02
Filed: 1988-07-07
Granted: 1992-02-25
Abstract: APPLICATION OF PAUL DIETIKER AND FREDERICK W. JOHNSON SLOW OPENING AND FAST CLOSURE GAS VALVE                ABSTRACT   A slow opening and fast closing gas valve includes a valve seat and a valve closure member arranged to respond to a gas pressure to seal against the valve seat to close the valve to an input gas f low therethrough. In order to open the valve, the gas exerting the gas pressure for sealing the valve closure member against the valve seat is allowed to bleed-off through a restriction while the input gas is allowed to urge the valve closure member away from the valve seat to provide a slow opening of the input gas flow path through the valve.  In order to close the input gas path through the valve, the input gas pressure is applied to the valve closure member to assist a closure spring in urging the valve closure member against the valve seat to produce a fast closure of the valve.  A second valve is arranged to selectively control the flow path of the gas being bled off from the valve closure member to provide an unrestricted flow path or a restricted flow path.  The restricted flow path is used during the opening of the valve while the unrestricted flow path is used during a closing of the valve.
Patent CA-1329260-C (CA)
Inventor: MOTOTAKE TATSUYA
IPC: G11B15/10
Filed: 1988-07-20
Granted: 1994-05-03
Abstract: ABSTRACT OF THE DISCLOSURE          A recording and/or reproducing apparatus for a magnetic tape cassette has a back-tension arm pivotably mounted on a mechanical chassis of the apparatus and an actuator mechanism for releasing braking force applied on a pair of tape reel bases by a pair of braking arms while a magnetic tape is run at a high-speed speed.  The actuator mechanism includes an axially sliding connector rod engaging with a slider through which said back-tension arm is actuated according to movement of the connector rod, whereby the back-tension arm may apply light friction to the take-up reel base in a reverse running mode in which the magnetic tape is fed from the take-up reel to the supply reel by rotation of a capstan and pinch roller at a relatively slow speed. This prevents the occurrence of slack in the magnetic tape when the tape is started in the reverse running mode.
Patent CA-1324229-C (CA)
Title: Mica-filled carbon monoxide unsaturated monomer copolymer
Inventor: KASTELIC JOHN R
IPC: C08K3/34
Filed: 1988-08-23
Granted: 1993-11-09
Abstract: A B S T R A C T                    POLYMER COMPOSITIONS     Polymer compositions having attractive mechanical properties comprise linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, and mica.
Patent CA-1310347-C (CA)
Title: Exercise device with underwater treadmill
Inventor: KELLER JEFF
IPC: A63B22/02
Filed: 1988-10-05
Granted: 1992-11-17
Abstract: Applicant:  Edmonds Medical Systems, Inc.          Title:      Exercise Device With Underwater Treadmill ABSTRACT     A treadmill is mounted in the central cavity of a unitary base unit which has a peripheral trough.          Sidewall panels and end panels bolt to the base unit.          Strips of resilient gasket material are interposed between the panels to assure a watertight seal.  One end panel has an inward opening door with a gasket strip engageable against a narrow inward-projecting of the doorframe, hinges and locking mechanism.  Water for the exercise tank can be stored in interconnected modular storage tanks or receptacles with one-way pumps for filling and draining the exercise tank.  An emergency switch connected to the user can be provided for emergency automatic draining of the tank.
Patent CA-1326339-C (CA)
Inventor: VANDENBROUCKE JACK-ERIC
IPC: E04B2/74
Filed: 1988-10-27
Granted: 1994-01-25
Abstract: ABSTRACT OF THE DISCLOSURE:        One-piece stud attachments support non-rigid insula-tion filling the cavities within a wall structure.  Each attachment comprises two tongue portions perpendicular to each other.  The first tongue portion is screwed or nailed on a wood stud, with the second tongue portion projecting into one of the cavities and penetrating the insulation to support it and prevent slippage thereof downwardly by gravity.  The second tongue portion may have spikes, its free end twisted, or a forked free end to hook the insulation. The first tongue portion can also be formed with spikes penetrating the wood of the stud in order to increase the rigidity of fixation.  Advantageously, the first tongue portion is made of a strip of metal sheet having its free end half folded over its other half to thereby form a U-shaped, first tongue portion which can be hooked into a hole of a metal stud.