baber/WOPTO huggingface dataset:
Patent CA-2000006-A1 (CA)
IPC: G06F12/00
Filed: 1989-10-02
Abstract: This invention encodes information (such as the field values of a database record, or the words of a text document) so that the original information may beefficiently searched by a computer. An information object is encoded into a small "signature" or codeword using a method. A base or "leaf" signature S1 34 is computed by a known technique such as hashing. The logical intersection (AND) ofeach possible combination of pairs of bits of the base signature is computed, and the result is stored as one bit of a longer combinatorial signature CS1 42. The bit-wise logical union (bit-OR) of the combinatorial signatures of a group of records produces a second-level combinatorial signature CS2 52 representing particular field values present among those records. Higher-level combinatorial signatures CS3 60, CS4, etc. are computed similarly. These combinatorial signatures avoid a "saturation"problem which occurs when signatures are grouped together, and a "combinatorial error" problem which falsely indicates the existence of nonexistent records, thereby significantly improving the ability to reject data not relevant to a given query. When the combinatorial signatures are stored in a hierarchical data structure, such as a B-tree index of a database management system, they provide means for more efficiently searching database records or document text by eliminating large amounts of nonmatching data from further consideration.
Patent CA-2002451-A1 (CA)
Title: Monitoring drilling mud composition using flowing liquid junction electrodes
Inventor: JASINSKI RAYMOND
IPC: E21B47/10
Filed: 1989-11-08
Abstract: ABSTRACT                     MONITORING DRILLING MUD COMPOSITION USING FLOWING LIQUID JUNCTION ELECTRODES   In  the  rotary drilling  of  oil wells a drilling mud is used both to transport  the  cuttings  up  to  the  surface and to impose an hydrostatic pressure  on  the walls of the borehole.  For these functions the mud must for  example  have  an  acceptable  density and viscosity.  It is therefore important  to monitor  the  characteristics  of  the mud, and to keep them within certain limits. The  technique proposed involves the use of an ion selective/reference electrode  pair to measure in the mud the potential of the selected ion's (as a  potential  difference),  and  thus  allow  a determination of that ion's concentration.   Thus, it is a method in which, using a selective/reference electrode pair where  the  reference  electrode  is  of the type having a liquid  junction via an aperture within the reference electrode containment vessel,  there  is  determined  the potential difference generated by, and thus  the  concentration  of,  the  ion in the mud.  However, the nature of drilling mud  is  such  that  some undesirable interaction between the mud components   and  the  reference electrode  occurs,  possibly  leading to erroneous  results.   The invention suggests that this problem can be dealt with  if,  during the  determination,  the  electrolyte  constituting the reference  electrode's  liquid  junction  is  caused  to  flow through the electrode  containment  vessel's  aperture  and  out of the vessel into the mud.
Patent CA-2004366-A1 (CA)
Inventor: SOLOMON DONALD D
IPC: A61L27/00
Filed: 1989-12-01
Abstract: An    anti-infective    medical    article    has chlorhexidine   bulk    distributed    throughout    a polyurethane base layer and may have a coating layer on the base layer.  The coating layer may be chlorhexidine permeated into the surface or it may be an antibiotic, antithrombogenic  agent  or  a polymeric  surface  layer laminated onto the base layer.  The invention includes a  method   for  preparing  the   article  wherein  a homogeneous  melt  of  polymer  and  chlorhexidine  is prepared by  twin  screw  compounding and the melt  is extruded  to  give  a  medical  article  having  bulk distributed chlorhexidine.
Patent CA-2005826-A1 (CA)
Inventor: DIVIGALPITYA RANJITH W M
IPC: B05D1/20
Filed: 1989-12-18
Abstract: Compositions of the formula MX2:Y, wherein MX2 is a layer type transition metal dichalcogenide, M is a metal selected from the group consisting of niobium, tantalum, molybdenum and tungsten, X is a chalcogen selected from the group consisting of sulfur and selenium and Y is a material located between layers of MX2. The compositions may be prepared by the steps of first forming a suspension of the MX2 in a body of water. A liquid which is immiscible with water is added to the suspension. The suspension and immiscible liquid are agitated together to form a temporary emulsion. The emulsion is allowed to rest until the water and the liquid separate with an interface therebetween. A sheet-like composition of MX2:Y forms at the interface. Preferably, the MX2 is in exfoliated, singular molecular thickness layers suspended in the water. The MX2:Y compositions may be used to coat objects or provide films for applications requiring the special properties of MX2:Y, including selective optical filters and energy selective x-ray focusing devices.
Patent CA-2009880-A1 (CA)
Title: Mechanism for inverting carrier
Inventor: OSHIDA MAMORU
IPC: B65G47/38
Filed: 1990-02-13
Abstract: A reversal mechanism according to the present invention comprises a reversal body (1) for reversing which includes a plate member (3) fixed to each of a plurality of carriers (8) connected to an endless chain (7) and four reversing elements (4) rotatably supported on each plate member (3) at positions spaced from each other in the circumferential direction by equidistance, and a reversing cam (2) provided on a track rail (9) on which the reversing elements roll. The reversing element (4) on the body (1) traveling on the rail (9) drops in a groove (6) formed in the reversing cam (2) to reverse the body (1) along a projection (5) on the reversing cam (2) about the dropped reversing element (4) to thereby downwardly direct the top opening of the carrier and thereby an article to be transferred can be taken out of the carrier.
Patent CA-2011555-A1 (CA)
Title: Aqueous disperse systems of photoinitiators and their use
Inventor: GIUSEPPE LI BASSI
IPC: C08F2/50
Filed: 1990-03-06
Abstract: AQUEOUS DISPERSE SYSTEMS OF PHOTOINITIATORS AND THEIR USE                   ABSTRACT      The invention relates to aqueous disperse systems of photoinitiators which  are particularly useful in the photopolymerisation of aqueous disperse  systems and emulsions of oligomers or polymers     carrying photopolymerisable  functionalities  which are widely  used  in  the field of dyes and packaging.
Patent CA-2012607-A1 (CA)
Inventor: POOLE DONALD R
IPC: C06D5/00
Filed: 1990-03-20
Abstract: Gas  generating  compositions  containing  an inorganic metal azide, a primary metal oxide oxidizing compound  and  a  secondary  oxidizing compound  in combination with clay as a means of controlling the burn rate.   Metal nitrates are preferred as the secondary oxidizing compound.
Patent CA-2012658-A1 (CA)
Title: A portable box
Inventor: SKILLIUS HANS
IPC: F25D3/08
Filed: 1990-03-21
Abstract: A portable box comprises a box body including a bottom and a circumferential, upright wall defining at its upper rim an opening, a cover closing the opening as well as a handle means in form of a preferably hoop-shaped handle.      The handle is pivotally hinged relative to the box body and the cover, a locking device being provided in the hinged area of said handle, where said locking device allows an opening or closing of the cover of the box body in a first portion of the turning movement of the handle and in other portions of said turning movement prevents an opening of the cover. The handle is pivotally hinged to the cover, and the locking device comprises two aligned locking protrusions projecting from their respective opposing wall portion and two aligned locking means associated with the handle and situated at their respective end of the cover, said two locking means comprising a hollow interior receiving the corresponding locking protrusion and further comprising a radial slot allowing an insertion of the locking protrusion into said locking means when the handle is situated in said first portion of its turning movement.
Patent CA-2014259-A1 (CA)
IPC: H04L7/00
Filed: 1990-04-10
Abstract: The frequency of a clock for a receiving terminal is controlled based on a predetermined clock frequency of a terminal that produces a continuous stream of data at a predetermined frequency for transmission to the receiving terminal over a communications network of the kind in which data is transmitted between the terminals in discrete packets that are delayed on the network by possibly different amounts. Arrivals of packets that are sent to the receiving terminal are detected, time intervals between the arrivals of successive packets are determined, and the time intervals are processed to generate an estimate that is related to the predetermined frequency. The frequency of the receiving terminal clock is controlled in response to the estimate.
Patent CA-2015604-A1 (CA)
Inventor: FLEMING SHANE D
IPC: B03D1/02
Filed: 1990-04-27
Abstract: Collector compositions for use in froth flotation processes for the beneficiation of gold, silver and platinum group values from base metal ores are disclosed. The collector compositions comprise at least one monothiophosphate compound selected from compounds of the formula:   (see formula I) wherein each R is a C2-C8 alkyl or a (see formula II) radical, R1 and R2 are, individually, hydrogen or C1-C4 alkyl radicals, n is 0 or 1 and X is a cation. The use of the monothiophosphate collectors provides excellent selective recovery of gold, silver and platinum group metal values in froth flotation processes conducted under alkaline conditions.
Patent CA-2020477-A1 (CA)
Inventor: BODMER DAVID
IPC: A61K47/36
Filed: 1990-07-05
Abstract: A sustained release formulation of a peptide drug compound, preferably a somatostatin like octreotide, e.g. as a pamoate salt.      The drug compound is present in a polymeric carrier, preferably a polylactide-co-glycolide, especially a poly(lactide-co-glycolide)glucose. The formulation is preferably a depot formulation in the form of a monolithic microparticle.
Patent CA-2020637-A1 (CA)
Title: Film cassette having film-exposure status indicator
Inventor: SMART DAVID C
IPC: G03B17/24
Filed: 1990-07-06
Abstract: FILM CASSETTE HAVING FILM-EXPOSED STATUS INDICATOR               ABSTRACT OF THE DISCLOSURE        A film cassette is disclosed wherein a filmstrip is advanced to the outside of a light-tight cassette shell in order to expose successive imaging areas of the filmstrip and can be returned to the inside of the cassette shell before all of the imaging areas have been exposed or after the filmstrip has been substantially completely exposed. According to the invention, a film-exposure status indicator is supported on the cassette shell for movement relative to the shell from a normal first position to successive second and third positions for providing respective visible indications that the filmstrip is generally unexposed, the filmstrip has been returned to the inside of the shell before all of its imaging areas have been exposed, and the filmstrip is substantially completely exposed.
Patent CA-2022676-A1 (CA)
Title: Magnetic disk cartridge
Inventor: SAEKI TETSUO
IPC: G11B23/28
Filed: 1990-08-03
Abstract: ABSTRACT OF THE DISCLOSURE A magnetic disk cartridge includes a write/protect tab adapted to prevent erasure of information recorded in a magnetic disk inserted in a case, and a peripheral wall defined in inner surfaces of corner portions of a pair of case members consisting of a case bottom member and a case cover member,  for slidably receiving  the write/protect tab therein; the write/protect tab being provided with a pair of arm portions extending along both sides of a body portion thereof, each of  the  arm portions being pro-vided with an outwardly projecting portion formed on a tip thereof; the peripheral wall  formed on  the  case bottom member being provided with two pairs of  receiving projecting portions formed on opposite side wall por-tions in a sliding direction of  the write/protect tab and adapted to receive end portions of the  one pair of projecting portions,  each of  the  side wall portions being provided with a wall surface formed between the two receiving projecting portions and curved  in the reversal direction relative to the projecting direction of the two receiving projecting portions; and when the write/protect tab is slid,  the one pair of projecting portions of the  write/protect tab being brought  into engagement with corresponding  the  two pairs of receiving projecting portions to  thereby receive the write/protect tab;, and each of  the  projecting portions of  the pair of arms of  the  write/protect tab is provided with an impact avoiding portion adapted to avoid impact caused by abutment between  the  projecting portion and an abutment surface of the side wall portion of  the case cover member which is to be abutted against the side wall portion forming the curved wall surface of  the case bottom member.
Patent CA-2023850-A1 (CA)
Title: Stabilizing reagent for membrane immunoassay
Inventor: HOKE RANDAL A
IPC: G01N33/569
Filed: 1990-08-23
Abstract: STABILIZING REAGENT FOR MEMBRANE IMMUNOASSAY                  ABSTRACT OF THE DISCLOSURE      A  method  for  immunoassay  for  a  ligand  is performed  on  a  porous  membrane  wherein  the  signal detected is development  of  a color  on the membrane. The color of the signal and background is substantially stopped and stabilized for reading of the assay -at a later time by passing a color stabilizing reagent which includes an acid through the membrane.
Patent CA-2026905-A1 (CA)
Title: Pipe repair or jointing collar
Inventor: JARDINE ROBERT W
IPC: F16L21/06
Filed: 1990-10-04
Abstract: A pipe repair or jointing collar comprising a pair of rigid arcuate casing members (10) which may be drawn together around a damaged pipe or a pair of pipe ends with the interposition of one or more elastomeric arcuate seals (13) and wedges (17) located between the casing members and the seals and adapted to slide inwardly and generally tangentially to force the seals radially inwards to ensure sealing engagement with the pipe or pipe ends, mutually abutting longitudinal resilient sealing strips (16) projecting, at least in part, from opposed faces of the wedges (17) in a manner such that in at least one region of each pair one of the sealing strips is substantially flush with its associated face whilst the other projects from it so that during assembly the projecting strip may ride laterally onto the flush strip to ensure lateral alignment of the casing members.
Patent CA-2027324-A1 (CA)
Title: Suction device with a squeegee for eliminating dirty water while cleaning certain surfaces
Inventor: ALAZET JEAN
IPC: A47L13/11
Filed: 1990-10-11
Abstract: ABSTRACT  The cleaning device comprises a squeegee (1) formed of a blade of elastic material, inside which are formed suction ducts (5) which open in at least one face of the blade through orifices (7) aligned in parallel with the lowermost edge (8) of the squeegee, close to said edge.  The suction ducts (5) are connected with flexible tubes (10) passing through a roller-type pump (11) to wards a collector tank (15) in which the dirtied cleaning liquid to be eliminated is collected.   This device may be used for removing a cleaning liquid having previously been spread over a surface which is to be cleaned.     (FIG. 4),
Patent CA-2027961-A1 (CA)
Title: Support for an external rearview mirror for motor vehicles
Inventor: FERREIRA DO ESPIRITO SANTO ANT
IPC: B60R1/06
Filed: 1990-10-18
Abstract: A support for an external rear view mirror for motor vehicles which comprises a support rod having an intermediate vertical portion for supporting the mirror and lower and upper transverse portions extending substantially horizontally from opposite ends of the intermediate vertical portion. Two supports are connected with free ends of the lower and upper transverse portions, respectively, for supporting said support rod on a vehicle body. A first support means includes a structure for rigidly connecting the free end of the lower transverse portion of the support rod with the one support, and an element for fixedly connecting the one support with the vehicle body. The second support includes a bracket for pivotally attaching the free end of the upper transverse portion with the second support and an arrangement for pivotally attaching the second support means to the vehicle body.
Patent CA-2031302-A1 (CA)
Inventor: HARDY JEAN-MARIE
IPC: A61B17/58
Filed: 1990-04-10
Abstract: Abrégé Ce fixateur comprend des mâchoires (5, 9, 46, 47) aptes à coopérer avec des moyens de fixation (10) coopérant avec les éléments à fixer, au moins un corps principal (1) et des éléments intermédiaires (38, 52, 53, 60, 66, 78, 79, 82, 83, 85) conformés pour remplir une fonction spécifique, lesdites mâchoires (5, 9, 46, 47), le ou lesdits corps (1) et lesdits éléments (38, 52, 53, 60, 66, 78, 79, 82, 85) présentant des agencements pour permettre directement ou par l'intermédiaire d'organes d'articulation rapportés (3, 4, 7, 8, 26, 27, 29), leur accouple-ment à volonté pour constituer un ensemble modulaire au niveau de sa structure avec capacité d'orientation angulaire dans différents plans et/ou de réglage li-néaire.
Patent CA-2032242-A1 (CA)
Inventor: MCDONALD DANIEL P
IPC: B29C65/00
Filed: 1990-12-13
Abstract: ABSTRACT OF THE DISCLOSURE         Dual flexible plastic pouches and a method of making the pouches where the pouches are reuseable and reclosable and have a double fastener strip arranged along the center between the pouches, the double strip is formed with a lower layer and upper pull flanges folded in from the edge of the lower layer with the pull flanges having reclosable rib and groove elements between the flanges and lower layer, an upper film web is juxtaposed over the lower web and bonded thereto over the peripheral edge to form pouches, the flanges are heat sealed to the upper web with a heat blocking thermal barrier between the flanges and lower layer of the fastener to prevent unintentional bonding.
Patent CA-2033098-A1 (CA)
Title: Zeroing method using a disturbance estimation observer
Inventor: TORII NOBUTOSHI
IPC: G05B13/04
Filed: 1990-06-04
Abstract: A B S T R A C T     A zeroing method capable of preventing degradation of transient characteristics of a control system, attributable to provision of an observer, while enjoying the ability of the observer to eliminate a disturbance.  An estimated disturbance (x) is determined in accordance with an actual current command (I-y') and an actual motor speed (v) by a disturbance estimation observer (5) which comprises four transfer elements (51 - 54) whose transfer functions (Kt/Jm, K1, K2/S, 1/S) are each determined by a corresponding one of a motor torque constant (Kt), and inertia (Jm) and parameters (K1, K2) of the system.  When a position deviation amount is small, a gain-adjusted estimated disturbance (y') obtained in a gain adjusting means (4) by multiplying the estimated disturbance by a feedback gain of value "1" is subtracted from a current command (I), to thereby eliminate a static frictional disturbance.  When the position deviation amount is large, the estimated disturbance is multiplied by the feedback gain of value "0" to render the observer to be inoperative, whereby degraded transient characteristics of the control system, due to the function of the observer, are prevented.
Patent CA-2037716-A1 (CA)
Title: Automatic area code dialing apparatus
Inventor: WALDMAN HERBERT H
IPC: H04M1/27485
Filed: 1991-03-07
Abstract: Abstract of the Disclosure Apparatus is shown which eliminates the need to repeat dial the same area code on a given long distance call.  The apparatus detects when a subscriber wishes to implement a long distance call.  Upon detection of the start of a call, the system automatically displays the last area code dialed.  The subscriber if desiring the last area code merely dials 7 digits.  The system recognizes that the subscriber has selected the last area code to cause the last area code dialed to be transmitted prior to the transmission of the 7 digits thereby completing a telephone number.  If the subscriber does not wish to utilize the last area code dialed he first dials a 1 and then dials in 10 digits and the proper digits are transmitted with the area code digits being replaced in the area code storage memory.  The system is particularly adaptable for use by cellular subscribers due to the fact that it reduces the number of digits dialed, saves dialing time and is therefore inherently safer to utilize while operating a vehicle.       It is further particularly useful in respect to a cellular equipped vehicle operating in a Roaming Area in that it eliminates the need for the Subscriber to repeat dial the local area code for every local call he places.
Patent CA-2040417-A1 (CA)
Title: Insertion of supplements into newspapers
Inventor: BACKMAN RALF
IPC: B65H39/06
Filed: 1990-10-05
Abstract: A method of inserting supplements into newspapers or magazines (20) and a general method of opening newspapers or magazines prior to the insertion process entail sepa-rate newspapers being transported in open state through an insertion station. The spines of the newspapers are held in firm contact with pocketlike holders (14, 45) on a conveyor (10) and the holders (14, 45) are caused to temporarily open when they pass the insertion station (60, 61), the firm contact between newspaper (20) and holders being still maintained. Apparatus for performing the method comprises a conveyor (10) and an insertion arrangement (60, 61) with means (14, 21, 22, 23, 25, 26) to open each newspaper (20) and means (60, 61) to insert a supplement into the opened newspaper. The apparatus may also include a second conveyor (40) with separate grip-pers (45) for each newspaper. The conveyor (40) extends through the conveyor (10).      The apparatus also includes means (P11, P12, P13) to temporarily open each gripper during its passage through the insertion station (60, 61; P12) of the insertion equipment. The apparatus furthermore includes means (46) to maintain orientation and position of the newspaper in relation to the gripper (45) while the latter is open in the insertion station (P12).
Patent CA-2041910-A1 (CA)
Inventor: WEBER JOSEPH R
IPC: G03G9/097
Filed: 1991-05-07
Abstract: The present invention provides toner compositions comprised of resin particles, pigment particles, and certain quaternary ammonium sulfate charge enhancing additives.  More specifically, the present invention is directed to toner compositions comprised of resin, pigment, or dye, and bis-(distearyldimethylammonium) sulfate.  The aforementioned charge additives can be incorporated into the toner or may be present on the toner surface.  Advantages of rapid admix, appropriate triboelectric characteristics, and the like are achieved with many of the toners of the present invention.