baber/WOPTO huggingface dataset:
Patent CA-2008720-C (CA)
Inventor: BEACH JOHN R
IPC: B25B23/06
Filed: 1990-01-26
Granted: 1994-07-26
Abstract: WASHER-DISPENSING AND FASTENER-DRIVING MACHINE AND STACKABLE ROOFING WASHER THEREFOR             Abstract of the Disclosure A machine for fastening one or more layers of roofing material to an underlayment, and a stackable washer therefor.  A chute receives a stack of such washers.  A shuttle displaces a single washer to a separated position when moved in one direction, to which the shuttle is biased, releases the single washer when moved oppositely.  A gate, which cooperates with camming surfaces on the respective washers, restrains the overlying washer in th stack against being displaced with the single washer and restrains the single washer from being displaced from the separated position.  Various components are provided by linking a stand-up screw gun of a known type to the shuttle.  The stackable washer is embossed so that each such washer and like overlying and underlying washers in a stack contact each other at three or more places, which define tangent planes intersecting planes defined by planar areas on such washers at angles more thant 45° but less than 90° whereby such washers are spaced from each other around their entire peripheries.  Notches in the washers cooperate with ribs in the chute to ensure that a stack of the washers is oriented properly when fitted into the chute.
Patent CA-2008831-C (CA)
Title: Method of detecting the presence of anomalies in biological  tissues and cells in natural and cultured form by infrared spectroscopy
Inventor: WONG PATRICK T T
IPC: G01N21/35
Filed: 1990-01-29
Granted: 1996-03-26
Abstract: The presence of anomalies in biological tissues and cells in natural and cultured form (e.g. cancerous tissues or cells) is detected by infrared spectroscopy. A beam of infrared light is directed at a sample of tissues or cells in natural or cultured form containing the cells to be tested, and the anomaly is detected at at least one range of frequencies by determining whether changes in infrared absorption have occurred due to the vibration of at least one functional group of molecules present in the sample which is characteristic of the anomaly.
Patent CA-2009906-C (CA)
Title: Method and device for automatic circulation in waste water pump stations
Inventor: LANDQUIST FOLKE
IPC: B01F15/02
Filed: 1990-02-13
Granted: 1999-12-28
Abstract: The pressure side of the pump unit is provided with a valve (6) which during certain periods opens a connection between the pump and the pump station to obtain circulation in the station. The valve (6) is opened and closed by a valve ball (9) which is controlled by the pump pressure.
Patent CA-2010910-C (CA)
Title: Pitch equalized chain with frequency modulated engagement
Inventor: AVRAMIDIS STELLIOS ANTHONY
IPC: B21L9/02
Filed: 1990-02-26
Granted: 1999-08-10
Abstract: A power transmission chain having a plurality of pin connected articulating arid guide ranks wherein each rank may include plain links having a thickness that may vary from rank to rank. A group of plain links having a pre-selected thickness is disposed in articulating ranks through-out the chain. Other groups of plain links having a different preselected thickness axe disposed in nonarticulating ranks of the chain. The combination of different thickness plain links disposed in a preselected manner coupled with elastic guide links throughout the chain is effective to minimize wear.      The groups of plain links having preselected but different thicknesses cooperate with different thickness guide links therein so as to improve load distribution thereacross, achieve equal deformation between the plain links and the guide links and maintain the transverse connecting pins substantially parallel to each other.      The plain links in this chain which are of the two tae variety are characterized by having nonidentical toes. As a result of this difference, the dimensions from the center of the pins to the working surfaces of each toe vary with the result being that the timing between successive link and sprocket tooth engagements can be varied.
Patent CA-2013009-C (CA)
Title: Assemblable modular elements, in particular in thin sheet, for the formation of a metal shelving
Inventor: BRIOSI ANTONELLO
IPC: A47B47/02
Filed: 1990-03-26
Granted: 2002-02-26
Abstract: Assemblable modular elements are described, particularly in thin sheet, suitable for the formation of a metal shelving.      The modular elements in question essentially comprise substan-tially tubular box-shaped bodies of generally rectilinear shape, which, on their upper face, are equipped with a longi-tudinal groove suitable to receive the folded or squashed end side of further elements forming supporting shelves. Said box-shaped bodies are also equipped, on their projecting portions, with openings suitable to receive corresponding projecting portions of further substantially rectilinear tubular elements forming the uprights of the shelving.      A substantially elongated, rectilinear element equipped at the ends with at least one opening suitable to receive the project-ing portions of the uprights, forming in this way a spacer of the shelving, also forms the object of the invention. Another assemblable element according to the invention is a containing body of substantially tray shape, equipped at the end with a folded edge suitable to be inserted and housed in the longitu-dinal groove of the crosspiece. The above elements are equipped with ribs and/or folded and/or superposed stiffening parts to increase their flexural strength.
Patent CA-2015480-C (CA)
Title: Optical interconnect arrangement
Inventor: ALFERNESS RODNEY C
IPC: G06E3/00
Filed: 1990-04-26
Granted: 1994-07-26
Abstract: AN OPTICAL INTERCONNECT ARRANGEMENT Abstract An arrangement for butt coupling of waveguide electrooptic plates to form a crossbar switch. The arrangement includes a stack of M splitter plates, each of which routes an injected optical signal to one of N outputs, and a stack of Ncombiner plates, each of which routes the signal of a selected one of M inputs to a common output. The stack of splitter plates is rotated with respect to the stack of combiner plates and the output signal ports of the splitter plates are coupled to the input signal ports of the combiner plates, so that each output of an splitter plate is connected to a different combiner plate. Within each splitter plate there is a fan-out network of waveguide electrooptic couplers and each coupler, under electric control, routes signals from one input to either one of two outputs. With j levels of such interconnected couplers 2j output are developed. The combiner plates have an identical architecture but with a signal flow in the reverse direction. Butt coupling of the splitter and combiner plates is achieved by employing splitter and combiner plates of a different crystal cut, by interposing polarization rotation means between the two stacks, or by including polarization rotation means within the splitter plates, the combiner plates, or both.
Patent CA-2015837-C (CA)
Title: Watch comprising means for lateral positioning of the movement in the watch case
Inventor: KAELIN LAURENT
IPC: G04B37/22
Filed: 1990-05-01
Granted: 1995-07-18
Abstract: The watch (1) in accordance with the invention compris-es positioning means for the movement in the case. These latter comprise positioning means including two blind holes (30)  arranged in the case (6)  and two centering elements (32),  these  latter having a  first  part driven  into  the blind holes and a  second part  (36)  projecting  from  the case and cooperating with openings  (38)   provided in the movement.
Patent CA-2017635-C (CA)
Title: Coal gasification reactor
Inventor: DAVERVELDT PETRUS HENRICUS WIL
IPC: C10J3/48
Filed: 1990-05-28
Granted: 2000-05-09
Abstract: The slugging efficiency of a coal gasification process is increased to 90% by tangential firing at small angles and the installation of a stack of specific length over diameter ratio between the reactor outlet and the quench inlet. In this manner slag lifting and slag entrainment at the quench inlet - stack outlet are prevented.
Patent CA-2018978-C (CA)
Inventor: ORI AIICHIRO
IPC: C07D405/06
Filed: 1990-06-14
Granted: 1997-02-25
Abstract: Process for preparing imidazole derivatives of the general formula (I)     ............. (I) wherein R1 and R2 independently are C1-C4 alkyl, by desulfurizing a mercaptoimidazole derivative of the general formula (I):        ................. (I) wherein R1 and R2 are as defined above, uith nitric acid in the presence of a nitrite.  The compounds of the formula(I) are useful for the treatment of glaucoma.
Patent CA-2021001-C (CA)
Title: Home heating system draft controller
Inventor: HABEGGER MILLARD A
IPC: F24D19/10
Filed: 1990-07-12
Granted: 1993-10-05
Abstract: HOME HEATING SYSTEM DRAFT CONTROLLER                       ABSTRACT        A forced air heating system having a dedicated supply duct for delivering heated air to the heated portions of the building and having an open air return system which uses the rooms, hallways, door openings, etc. of the building for returning air back to the furnace  for  reheating  and  recirculating.    The elimination  of  a  dedicated  return  air  duct significantly improves the distribution airflow volume and thereby the efficiency and comfort of the central heating and air conditioning.  The system includes a flue draft controller which monitors the flue draft at all heating appliances, such as furnaces, hot water heaters, etc., and servos a damper in a single main flue serving all appliances to optimize the flue draft for all  appliances.    If the  flue draft becomes inadequate in any appliance, the controller shuts down heating appliances, as well as all heating system circulation fans, power fans and building exhaust fans which can affect the flue draft.  The controller also enables building safety devices, such as smoke and combustible  gas  detectors  to  shut  down  heating appliances when a building safety problem is detected.
Patent CA-2021652-C (CA)
Title: Structure for supporting trackway of a track following transportation system, in particular, a magnetic suspension railroad
Inventor: RASCHBICHLER HANS-GEORG
IPC: E01B25/10
Filed: 1990-07-20
Granted: 1998-06-02
Abstract: A structure for supporting a trackway of a track following transportation system, particularly, a magnetic suspension railroad and including a support and at least one equipment element having an operational surface and attached to the support.  The supporting structure further includes bolts for securing the equipment element to the support.  There is further provided a form-locking means which becomes effective only if the fixing bolts fail and which then limits displacement of the equipment element relative to the support to a predetermined amount.
Patent CA-2023070-C (CA)
Title: Electronic circuit package and production thereof
Inventor: ARAI YASUNARI
IPC: G02B6/42
Filed: 1990-08-10
Granted: 1993-09-07
Abstract: Abstract of the Disclosure An electronic circuit package which includes first and second conductive metal members and a circuit board held between the first and second metal members and having a cutout in which an electronic circuit part is accommodated and a process of producing such electronic circuit package are disclosed.  With the electronic circuit package, deterioration of a high speed characteristic of an electronic circuit part accommodated in the package is minimized, and accordingly, when the electronic circuit package is applied to an IC for very high speed optical communications for use with an optical repeater or the like, a very high speed system can be realized.  By assembling the components in accordance with a predetermined order, facility in process of production and improvement in reliability of products are attained.
Patent CA-2025879-C (CA)
Title: High x (2) optical article
Inventor: RIDER CHRISTOPHER B
IPC: G02F1/19
Filed: 1990-09-20
Granted: 1993-10-12
Abstract: HIGH x(2) OPTICAL ARTICLE Abstract of the Disclosure A nonlinear optical article for the controlled propagation of electromagnetic radiation is disclosed.  The article includes a reflective metal layer having a thickness in the range of from 100 to 1000.ANG. and work function in the range of from 2.5 to 4.5 eV, an optical coupler, a dielectric medium comprised of a poled polymeric layer exhibiting a glass transition temperature of at least 50°C and a second order polarization susceptibility greater than 10-9 electrostatic units, and means for variably applying an electrical potential to a surface of the dielectric medium remote from the reflective metal layer.  A protective metal fluoride or oxide layer having a thickness of less than 0.1 µm is interposed between the reflective metal layer and the poled polymeric layer.
Patent CA-2028300-C (CA)
Title: Membrane process for acid recovery
Inventor: BOATENG DANIEL A D
IPC: B01D61/58
Filed: 1990-10-23
Granted: 1996-07-16
Abstract: A method for the recovery of acids from dilute aqueous acid solutions containing at least one metal cation such as Zn, Ca, Mg, Na, K, Mn, Al, Fe, Ni and Co comprises feeding solution to the dialyzate compartments of a dialysis unit.          The dialyzate, substantially containing any metal cations, is removed from the process.  The diffusate, containing the acid from the feed solution and being substantially free of metal cations, is fed into the diluate stream circulating through the diluate  compartments of an electrodialysis unit.  A portion of the circulating diluate is returned to the diffusate compartments of the dialysis unit.   The concentration gradient of acid anions across the dialysis membranes  is  increased  by adding  a  quantity  of  acid-receiving solution to the returned diluate portion.  The feed rates of solutions to the compartments of the dialysis unit are at least double those in processes using only dialysis.  A concentrate stream is recirculated through the concentrate compartments of the electrodialysis unit.  The applied  current   causes   an   increase   in   the   acid concentration  in  the  concentrate.    A  portion  of the concentrate is withdrawn as a concentrated acid product substantially free of metal cations.  If desired, the acid concentration in the product is controlled by feeding a quantity  of  the  diffusate  from the  dialysis  into  the circulating concentrate stream, as necessary.  The dialysis is carried out at ambient temperatures up to 45C,  and electrodialysis at from 0 to 60C and at 100 to 1000 A/m2.
Patent CA-2028833-C (CA)
Inventor: BALDACCI BRUNO H
IPC: B65D81/09
Filed: 1990-01-26
Granted: 1997-03-04
Abstract: A flexible, cushioning dunnage product is producible from stock sheet material.  The edges of the stock material are rolled inwardly to form pillow-like portions (12) which are urged laterally inwardly with respect to one another into confronting abut-ting relation, with the pillow-like portions being then connected together along their engaged abutting sides by, in the preferred embodiment, transversely extending coined sections extending transversely of the product and defining a generally central con-necting portion (14) running in a direction lengthwise of the product.  Perforations (22) are provided in the connecting portion to aid the overlapped coined sections in preventing opening up or separation of the connecting portion, and thus such perforations aid in maintaining the pad-like form of the product for packaging or packing.
Patent CA-2033531-C (CA)
Title: Azaoxindole derivatives
Inventor: ROBINSON RALPH P
IPC: A61P11/00
Filed: 1991-01-03
Granted: 1998-06-23
Abstract: This invention relates to novel 4-, 5-, 6-, and 7-azaoxindole derivatives of the formula:                                 (see fig. I) (wherein one of A, B, D and E is N and the others are CH; Y is H, OR3, OH, lower alkyl, CF3, COR3, halogen, COOR3, CONR3R3, CN, NO2, SR3, SOR3, SO2R3 or SO2NR3R3; R1 is lower alkyl or CONHR4; R2 is lower alkyl, (CH2)nR5 [where n is 0 or 1] or NHR6; R3 is H, lower alkyl, allyl, optionally substituted phenyl or optionally substituted benzyl; R4 is H, lower alkyl, hydroxyalkyl, cycloalkyl, COR3, optionally substituted phenyl or optionally substituted heteroaryl; R5 is H, cycloalkyl, optionally substituted phenyl or optionally substituted heteroaryl; R6 is phenyl, thiophene or furan, each optionally substituted; W is H, alkanoyl, cycloalkylcarbonyl, phenoxycarbonyl, acyloxyalkyl, alkoxycarbonyloxyalkyll alkylsulfonyl, lower alkyl, methylphenylsulfonyl or dialkylphosphonate, with the proviso that (a) when E is N, then at least one of X and Y is other than H; and (b) when either R2  is NHR  or R1  is lower alkyl, then W is H).  The compounds are anti-inflammatory and analgesic agents and inhibitors of one or more of prostaglandin H2 synthase, 5-lipoxygenase and interleukin-1 biosynthesis.  They are useful in the treatment of chronic inflammatory diseases, allergy, psoriasis, various bone diseases, and immune dysfunctions such as systemic lupus erythematosis.
Patent CA-2036624-C (CA)
Inventor: O'SULLIVAN DERMOT
IPC: H02M3/28
Filed: 1991-02-19
Granted: 1994-08-23
Abstract: Ce convertisseur comprend un transformateur avec deux enroulements primaires montés en opposition et au moins un enroulement secondaire; une source de tension constante dont une première borne est reliée au point milieu du transformateur; deux commutateurs montés chacun en série entre la seconde borne de la source de tension et un enroulement primaire respectif; et des dispositifs de commande de ces commutateurs pour relier alternativement et périodiquement la seconde borne de la source de tension à l'un ou à l'autre des enroulements primaires. Les dispositifs de commande imposent, entre l'ouverture de l'un des commutateurs et la fermeture ultérieure de l'autre commutateur, un temps de commutation pendant lequel ces commutateurs sont tous deux à l'état ouvert. Selon l'invention, il est prévu des dispositifs d'ajustement automatique du temps de commutation, comportant: des détecteurs pour comparer la tension de chacun des enroulements primaires à un potentiel de référence; et des dispositifs inhibiteurs pour empêcher, après l'ouverture de l'un des commutateurs, la fermeture de l'autre commutateur tant que la tension de l'enroulement primaire correspondant à ce dernier n'est pas devenue inférieure à un potentiel prédéterminé.
Patent CA-2050812-C (CA)
Title: Pregna-1,4-diene-3,20-dione-16-17-acetal-21 esters, process for their preparation, compositions, and methods for the treatment of inflammatory conditions
Inventor: CALATAYUD JOSE
IPC: C07J71/00
Filed: 1991-09-06
Granted: 2003-07-29
Abstract: The present invention relates to compounds of the formula   in the form of an R epimer, an S epimer, or a stereoisomeric mixture of the R and S epimers in terms of the orientation of the substituents on the carbon atom at positron 22, novel intermediates and a method of their preparation by hydrolysis-ketalization, and use of such compounds as drugs and/or therapeutic agents.
Patent CA-2053820-C (CA)
Title: Method of inhibiting metabolism of cholesterol
Inventor: AKIMOTO KENGO
IPC: A61P3/00
Filed: 1991-10-21
Granted: 1997-02-04
Abstract: A method of inhibiting the metabolism of cholesterol, comprising administering to a subject a pharmaceutical composition comprising a dioxabicyclo-[3.3.0]octane derivative represented by the following general formula (I):       (I) wherein R1, R2, R3, R4, R5 and R6 independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, or R1 and R2 and/or R4 and R5 together form a methylene group or an ethylene group, and n, m and ? are 0 or 1.
Patent CA-2055037-C (CA)
Title: Arbitration circuit for a multimedia system
Inventor: SUAREZ GUSTAVO ARMANDO
IPC: G06F13/374
Filed: 1991-11-06
Granted: 1996-06-25
Abstract: The invention is an N-bit arbitration circuit which includes N bit subcircuits, each of which provides a single bit output signal of an N-bit arbitration signal.  The bit subcircuits include a more significant bit subcircuit and a least significant bit subcircuit.  The more significant bit subcircuit  includes  a  gate,   which  receives  a  more significant bit priority signal and an arbitration enable signal and provides a more significant bit of the N-bit arbitration signal, and a pipeline circuit, which receives the more significant bit priority signal, the arbitration enable signal and the more significant bit and provides a pipelined  arbitration enable  signal  based upon the  more significant  bit  priority  signal,  the  arbitration  enable signal and the more significant bit.  The least significant bit  subcircuit  includes  a  gate,  which receives  a  least significant   bit   priority   signal   and   the   pipelined arbitration enable signal and provides a least significant bit output signal of the N-bit arbitration circuit output signal,  and a source enable circuit,  which receives the least significant bit arbitration indication signal and the pipelined arbitration enable signal and provides a source enable  signal  based  upon the  least  significant  bit arbitration indication signal and the pipelined arbitration signal.
Patent CA-2058632-C (CA)
Title: Exonuclease-resistant oligonucleotides and methods for preparing the same
Inventor: FROEHLER BRIAN C
IPC: C12Q1/68
Filed: 1990-06-05
Granted: 2004-08-24
Abstract: A method is provided for making 3' and/or 5' end-capped oligonucleotides so as to render the oligonucleotide resistant to degradation by exonucleases. The exonuclease degradation resistance is provided by incorporating two or more phosphoramidate and phosphoromonothioate and/or phosphorodithioate linkages at the 5' and/or 3' ends of the oligonucleotide, wherein the number of phosphoramidate linkages is less than a number which would interfere with hybridization to a complementary oligon-ucleotide strand and/or which would interfere with RNAseH activity when the oligonucleotide is hybridized to RNA.
Patent CA-2064965-C (CA)
Title: Lithium secondary battery
Inventor: FUJIMOTO MASAHISA
IPC: H01M6/16
Filed: 1992-04-02
Granted: 1997-06-03
Abstract: Provided is a novel lithium secondary battery comprising a positive electrode comprising a compound capable of occluding and discharging lithium, a negative electrode principally comprising a carbon material which comprises a graphite as an only or principal component, a separator placed between the positive electrode and the negative electrode; and an electrolyte solution of an electrolyte solute dissolved in a solvent comprising at least one specific cyclic compound.  The lithium secondary battery has a large capacity, small self-discharge rate and excellent cycle characteristics and high charge-discharge efficiency.
Patent CA-2087381-C (CA)
Title: Magazine rack and positional adjustment system therefor
Inventor: TANI OKIE
IPC: H05K13/00
Filed: 1993-01-15
Granted: 1997-03-25
Abstract: A magazine rack and adjustment/transport system therefore  includes  a conveyer  line for  introducing magazine racks into a production process.   As a new magazine rack is introduced to the line, a positional adjustment means is active to position the magazine rack on the conveyer.   In addition,  the alignment of the magazine rack on the conveyer may be adjusted and a present accommodating width or the magazine rack may be detected and compared with an accommodating width required by a process being carried out on the conveyer. If the detected accommodating width of the magazine rack is other than the required accommodating width, the rack may automatically be adjusted by an adjustment mechanism prior  to  being  added  to  the  conveyer  or  at  a predetermined position on the conveyer.