baber/WOPTO huggingface dataset:
Patent CA-2009732-A1 (CA)
Title: Process for stimulating oil and gas wells in oil and gas production from subterranean formations, and stimulant for this purpose
Inventor: BATHELT HEINRICH
IPC: C09K23/16
Filed: 1990-02-09
Abstract: Abstract of the disclosure A process for stimulating oil and gas wells in oil and gas  production  from  subterranean  formations,   and stimulant for this purpose In the process described, the oil/gas-containing sub-terranean  formations  are  contacted  with  a  selected fluorosurfactant as a stimulant.   A particularly pre-ferred stimulant is composed essentially of the said fluorosurfactants and of non-fluorinated nonionic sur-factants from the group comprising the alkoxypolyethylene glycol ethers and from the group comprising the alkyl-phenoxypolyethylene glycol ethers, the three components being present in a weight ratio of preferably about 1 : 1 : 1.
Patent CA-2010105-A1 (CA)
Inventor: BEYERSDORF HARTWIG
IPC: G01N27/64
Filed: 1990-02-15
Abstract: This detector exhibits a measuring chamber which can be ionised by a radioactive source, is accessible to the environmental air and has a first electrode connected to a d.c. feed voltage and a measuring electrode, the potential of which changes as a function of the density of the smoke when smoke enters the measuring chamber, and is measured for the purpose of generating a smoke alarm signal when it reaches a predetermined value, the potential of the measuring electrode being measured for at least one further electrical field strength and being compared with at least one second potential value which occurs at the second field strength in accordance with the law of small ion deposition when there are smoke aerosols in the measuring chamber. <IMAGE>
Patent CA-2011306-A1 (CA)
Title: Composites having reduced microcracking and methods of making the same
Inventor: WRIGHT ROY F
IPC: C08L81/00
Filed: 1990-03-01
Abstract: Abstract of the Disclosure Reinforced plastic composites having reduced microcrack-ing formed of continuous fibrous reinforcing material and matrices of poly(arylene sulfide)-poly(aromatic sulfide/sul-fone)  resin mixtures and pultrusion methods of producing such composites are provided.
Patent CA-2011309-A1 (CA)
Title: Transient surge suppressor and alarm signal circuit
Inventor: COREY LAWRENCE G
IPC: H02H9/04
Filed: 1990-03-01
Abstract: ABSTRACT OF THE DISCLOSURE        An alarm circuit for a transient voltage suppression circuit for protection of  equipment using alternating current power is shown and described.  This device utilizes a pair of diodes having the same terminals  (polarity)  connected to a node to which a resistor provides an AC voltage.  The diodes conduct during one half cycle in normal operation,  and the node is at a virtual ground when both diodes conduct.  When a fuse from one diode to ground opens, current no longer flows and the voltage at the node rises as the other diode conducts and applies a voltage to resistors and an alarm input.         There is also disclosed a suppression circuit which provides  for isolation of the ground  from neutral  in the event of failure of the varistor.
Patent CA-2014638-A1 (CA)
Inventor: OZAWA SHOUGO
IPC: B62D65/02
Filed: 1990-04-17
Abstract: ABSTRACT           This  invention  relates  to  an  equipment  for automatically attaching and detaching such exterior parts as doors, a trunk, and a bonnet, etc. which are openably mounted  to a vehicle body by means of such tightening means as pins,  bolts,  etc.  on the assembling line of a vehicle.           Firstly,  in a door attaching and detaching equipment, the position of pins for openably attaching a door on a vehicle body is detected by the pin position detection mechanism,  and the position of the pin drawing out and inserting  mechanism  is  compensated  according  to  the position thereof. Then, the pins can be drawn out from and inserted  in  the  vehicle  body  and  the  door  by  the corresponding  pin  drawing  out  and  inserting mechanism. Furthermore, the position of the door holding mechanism is compensated according to the position of the pins detected by the pin position detection mechanism, thereby causing the door  to  be held by  the  corresponding door holding mechanism. In this case, the pin drawing out and inserting mechanism and the door holding mechanism are separately installed independently  and  are  individually  driven  to actuate.           Next, in a fender attaching and detaching equipment, as the holding member which constitutes the holding mechanism makes a closing action by the driving means on the base plate, the holding member moves, following the position of the fender, thereby causing the fender to be held. Also, the position of the screw member screwed in the vehicle body is detected by the detection mechanism, and the position of the nut runner mechanism is compensated on the basis of the position of the screw member detected by the detection mechanism. Thereafter, the screw member can be tightened and loosened by the nut runner mechanism.  Also,  the above procedure is reversed when attaching the fender to the vehicle body.  Furthermore,    in  a  trunk  or  bonnet  attaching  and detaching equipment, as the trunk or bonnet is opened for the  vehicle  body  by  the  trunk or  bonnet  opening  and closing mechanism,  the holding member which constitutes the holding mechanism is closed by the driving means on the base plate.  So,  the holding member moves,  following the position of the trunk or bonnet, thereby causing the trunk or bonnet to be held.  Also,  the position of the screw member screwed in the vehicle body is detected by the detection mechanism, and simultaneously the position of the nut runner mechanism is compensated on  the  basis of  the  position of  the screw member detected  by  the detection mechanism.  Thereafter, the screw member can be tightened and loosened by the nut runner mechanism.  Also,  the above  procedure  is  reversed when attaching the trunk or bonnet to the vehicle body.
Patent CA-2014817-A1 (CA)
Title: Still image sensing apparatus
Inventor: TAKAYAMA TSUTOMU
IPC: H04N9/73
Filed: 1990-04-18
Abstract: A still image sensing apparatus comprising an image sensor, a memory circuit for writing therein the video signal for one field or one frame from the image sensor, a detecting circuit for detecting the color temperature information of a light source related to an object being photographed on the basis of the aforesaid video signal, and a control circuit receptive of an output of the detecting circuit for controlling the white balance of a video signal read from the memory circuit.
Patent CA-2015561-A1 (CA)
IPC: C07C51/12
Filed: 1990-04-26
Abstract: Process for the preparation of 1,6-hexenedioic acids by reaction of carbon monoxide and water with at least one butene disubstituted by acyloxy groups in the presence of a catalyst based on palladium and on at least one quaternary onium chloride of a group VB element chosen from nitrogen and phosphorus, the said element being tetracoordinated to carbon atoms, it being possible for the nitrogen to be coordinated to two pentavalent phosphorus atoms.
Patent CA-2015886-A1 (CA)
Inventor: HEHL KARL
IPC: B29C48/09
Filed: 1990-05-03
Abstract: The heating apparatus comprises metal heating shells (shells 14) each with a single cast-in heating element, which is shaped from a linear pipe to form at least one loop (13). The heating element has supporting faces (13e) which are not covered by the cast metal and on which clearances (14e, 14f) starting from the inner and outer circumferential surface of the shell (14) open out. Such a design achieves the effect that the metal shells can be produced with considerably smaller wall thickness by the pressure diecasting process using relatively high injection pressures. The small wall thickness allows the contact faces (14g) to bear fully against the plasticising cylinder and thus allows more rapid heating (Figs. 7, 7a, 7b).
Patent CA-2018153-A1 (CA)
Title: On-line iron clean-up
Inventor: DUBIN LEONARD
IPC: F28G9/00
Filed: 1990-06-04
Abstract: ABSTRACT OF THE INVENTION    An iron oxide cleaning composition and method for using these compositions as disclosed.  This cleaning process uses formaldehyde sulfoxylate reducing agents in combination with hydrolyzable tanning extracts and chelating agents to remove deposited iron oxide from metal surfaces, particularly those surfaces exposed to recirculating cooling waters.
Patent CA-2019370-A1 (CA)
Title: N-substituted carbamoyllactam functional compounds and polylactam block copolymers derived therefrom
Inventor: VRIESEMA BINDERT K
IPC: C08G18/60
Filed: 1990-06-20
Abstract: (19) A B S T R A C T     Disclosed are conversion products of N-substituted carbamoyllactam functional compounds characterized by the general formula:                          where: A     represents an oxygen atom or an NH group; R     represents an alkyl, aralkyl, alkaryl or aryl group, where alkyl and alkyl bound in aralkyl or alkaryl may also be cycloalkyl; P     represents a residue of a compound P(AH)X with a number average molecular weight of at least 150, with one or more OH or NH2 groups, P(AH)X being a liquid crystalline compound or a compound with liquid crystalline segments in the main chain and/or the side chain, or a compound which forms with lactam-blocked polyisocyanate a compound with liquid crystalline properties; (-L-)  represents an opened lactam ring; (-L)   represents a non-opened lactam ring;  x     is a whole number higher than or equal to 1; y     is equal to 0 or 1; and a     is a whole number higher than or equal to 1.          Further, the present invention relates to polylactam block copolymers obtained by lactam polymerization at a lactam group.
Patent CA-2023679-A1 (CA)
Inventor: TOKUMOTO YUUICHI
IPC: C07C5/333
Filed: 1990-08-21
Abstract: A method for preparing .alpha.-(4-isobutylphenyl)propionic acid or its precursor is here disclosed which comprises the following steps (I), (II) and (III): step (I):  subjecting isobutylbenzene and a polyalkylbenzene to disproportionation reaction in order to form p-isobutylethylbenzene step (II):  dehydrogenating p-isobutylethylbenzene obtained in the step (I) to form p-isobutylstyrene, and step (III):  the following step (IIIa) or (IIIb): step (IIIa):  reacting p-isobutylstyrene obtained in the step (II) with carbon monoxide and hydrogen to prepare .alpha.-(4-isobutylphenyl)propionaldehyde, or step (IIIb):  reacting p-isobutylstyrene obtained in the preceding step (II) with carbon monoxide and water or a lower alcohol to prepare .alpha.-(4-isobutylphenyl)propionic acid or its alkyl ester.
Patent CA-2027997-A1 (CA)
Title: Stacking pipe protector
Inventor: MCFARLAND GLENN E
IPC: B65D85/20
Filed: 1990-10-18
Abstract: ABSTRACT         A  two-part,   ring-like,   hook-on  protector  device provides  a  secure  but  easily  removable  mounting at  spaced locations along heavy pipe or casing members that are normally stacked in a horizontal lengthwise extending relation for storage and  shipment  to  oil  and  gas  well  drilling  and  operating locations.     The   device,   of  two-part,   pivoted   together construction and circular shape,  is formed of tough elastomer material   whose   parts   are   of   complementary   interfitting construction devised to assure a substantially equally spaced, stacked relation between adjacent pipe members to both protect the members along their lengths as well as any threaded ends and collars.    It  has  a  maximum  unitized  strength  and  a  space-retaining resistance  to deformation  with  respect to  radially applied forces thereon when several devices are mounted in a lengthwise spaced relation along a pipe member that is in a stacked relation with adjacent members.  It employs two solid, stress-absorbing pivoted-together, semicircular pairs, halves or arms.  At least one pair of adjacent ends of its arm parts are pivotally connected together and the other pair of adjacent ends have a separable connection to permit the parts to be opened as well  as  closed  for  easy  latching-on  mounting  and  unlatched removal from pipe members that are being stacked for storage and those that are being removed for usage.  It is shown as having a full body or thickness throughout along its extent, including its joints, and is resilient throughout and fully reusable. Its two arm parts are shown as of a balanced substantially equal extent and through-extending latch pins serve at one joint to pivotally swingable connect its two arm parts and,  at the other joint, serve as connecting latching means for opening and closing the arm parts about a pipe member.
Patent CA-2029326-A1 (CA)
Title: Machine for realizing mechanical radiators
Inventor: FREGNAN ANDREA
IPC: B21D39/08
Filed: 1990-11-05
Abstract: A B S T R A C T           A   machine   for   realizing   mechanical    radiators, particularly those for motor vehicles, including  positioning and  support  means  for the radiators to be  treated  and  a plurality  of rods provided with an expansion element at  one end  and associated with means for their movement  along  the tubes of said radiators, characterized by comprising:        - a  loading table (1) removably housing a radiator (2) in  a blocked condition during the expansion treatment and having the  walls  in  contact with the ends  of  said  tubes  (4) provided with openings facing them, for the passage of said rods (10), - vertically  mobile  means (17), for holding  the  expansion elements (11) in the correct reciprocal operative position, - stationary means (16) placed between the loading table  (1) and said holding means (17) for centering and guiding  said rods (10) in the correct reciprocal operative position, and - a device (12) for the disengageable hooking of the ends  of the rods (10) not provided with the expansion element  (11) and making traction on it, said device,(12) being placed on the part of the loading table (1) opposite to that in which said  stationary  centering  means  (16)  and  said  mobile holding means (17) are.
Patent CA-2030139-A1 (CA)
Title: 3-d amusement and display device
Inventor: DURLACH DAVID M
IPC: A63F3/00
Filed: 1990-11-16
Abstract: A device provides temporal and spatial 3-D patterns with a plurality of elements 21. The shape, position and orientation of the elements 21 are controlled by a computer 31. The medium in which the elements 21 lie provide movement of the elements 21 without effects of vibration or turbulence. In a particular medium, elements 21 movements are dampened such that a quick change in position and/or orientation of an element 21 is without apparent vibration. The medium and elements 21 are of respective materials such that noise is eliminated. In one embodiment, iron powder elements 21 on a surface 17 are repositionable and reorientable in a desired temporal and spatial pattern through computer 31 controlled changes to a generated magnetic field. In another embodiment, different sized bubbles are generated in a desired temporal and spatial pattern in a tank of glycerin through computer controlled air valves. The computer control is preprogrammed or in response to user operation of an input device 33.
Patent CA-2033624-A1 (CA)
Title: Automatic self-aligning trailer hitch
Inventor: FRANCISCO THOMAS E
IPC: B60D1/36
Filed: 1991-01-04
Abstract: Abstract of the invention An automatic trailer hitch for use with a draft vehicle is disclosed.  This hitch contains devices for attaching its two ends to a trailer and to a vehicle for towing the trailer.  When the hitch is being connected to the vehicles, it may be extended in length; the presence of at least two telescoping members in the hitch allows such extension.  Once the hitch has been connected to the vehicles, the towing vehicle may be backed towards the draft vehicle, thereby contracting the length of the hitch.  A locking mechanism, comprised of a spring-loaded pawl, locks the hitch into its contracted position once it has reached a certain specified minimum length.
Patent CA-2035016-A1 (CA)
Title: Polymer compositions
Inventor: SMUTNY EDGAR J
IPC: C08L23/26
Filed: 1991-01-25
Abstract: A B S T R A C T                         POLYMER COMPOSITIONS      Provided are melt-stabilized polymer compositions comprising a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated compound, and a stabilizing quantity of at least a zinc compound, selected from the group of zinc compounds, consisting of: a)   a zinc aluminate, and optionally an acidic polymer containing moieties of an .alpha.-olefin and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, b)   the reaction product of an oxy-bridged zinc-aluminium or zinc-titanium compound and an acidic polymer containing moieties of an .alpha.-olefln and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, and c)   a partially zinc-neutralized acidic polymer containing moieties of an .alpha.-olefin and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid and salt of aluminium, magnesium or scandium.
Patent CA-2036591-A1 (CA)
Inventor: BILLINGSLEY HENRY C
IPC: F02B61/04
Filed: 1991-02-19
Abstract: ABSTRACT OF THE DISCLOSURE An internal combustion engine comprising an engine block including first and second cylinders and first and second combustion air passages for supplying combustion air to the first and second cylinders, respectively, a first carburetor communicating with the first combustion air passage, having therein a first opening, and including a first fuel supply passageway communicating with the first opening, a second carburetor communicating with the second combustion air passage, having therein a second opening, and including a second fuel supply passageway communicating with the second opening, and a fuel manifold including an integrally molded first manifold portion comprising an elongated portion defining a first main passageway having a closed end and an opposite open end, and a first nipple portion defining a first nipple passageway communicating between the first opening and the first main passageway and extending transversely to the first main passageway, and an integrally molded second manifold portion comprising an elongated portion defining a second main passageway having a closed end and an opposite open end communicating with the open end of the first main passageway, and a second nipple portion defining a second nipple passageway communicating between the second opening and the second main passageway and extending transversely to the second main passageway.
Patent CA-2038126-A1 (CA)
Title: Method of improving the quality of crude diaminodiphenylmethanes
Inventor: BRUCHMANN BERND
IPC: C07C209/84
Filed: 1991-03-11
Abstract: ABSTRACT OF THE DISCLOSURE         A method of improving the quality of crude diaminodiphenylmethanes comprising the treatment thereof with hydrogen in the presence of a hydrogenation catalyst.
Patent CA-2042163-A1 (CA)
Title: Noise immunity in hdtv signals
IPC: H04N7/16
Filed: 1991-05-09
Abstract: An arrangement for a television receiver to attenuate correlated noise injected by the transmission medium. Recognizing that there is substantial line to line correlation of the transmission noise injected by interfering television stations, this arrangement enhances noise immunity by inserting in the receiver a de-emphasis stage that includes a circuit for removing the correlated noise. To account for the modifications to the desired signal that are introduced by the de-emphasis circuit, a pre-emphasis circuit is included in the transmitter. In accordance with one embodiment, the receiver's circuit comprises a feed-forward arrangement where the received signal of a scan line is subtracted from a fraction of the received signal of the previous scan line. At the transmitter, a feedback loop develops a scan line to be transmitted that corresponds to a video scan line subtracted from a fraction of the previous scan line to be transmitted. This arrangement also removes some of the correlation in the signal of the video scan lines, which results in the developed scan lines having lower amplitudes. The latter permits insertion of a gain stage, which increases the signal power relative to the noise and thereby improves the signal to noise ratio at the receiver.
Patent CA-2042666-A1 (CA)
Inventor: JALBERT TIMOTHY J
IPC: A63C3/00
Filed: 1991-05-15
Abstract: ABSTRACT OF THE DISCLOSURE           A mobile skating aid for providing support for a beginning skater includes a surrounding main frame supported at approximately waist-height on telescoping posts which extend upwardly from a pair of elongated runners intended to continuously contact a skating surface.   The posts are arranged to enable the height of the main frame,  which includes a hand rail, to be adjusted,  and further to be easily collapsed and folded flat against the underside of the frame for convenient storage and transportation.  A seat element  flexibly  suspended  from  the  main  frame  at  an adjustable distance below the frame at  a height to be straddled by the user provides a safety catch which prevents falling even if the skater completely loses footing or traction.
Patent CA-2043286-A1 (CA)
Title: Quick connect/release/adjust buckle
Inventor: BEDFORD MURRAY R
IPC: A44B18/00
Filed: 1991-06-07
Abstract: ABSTRACT     A buckle device which is easy to adjust and can be connected quickly is disclosed.  The buckle device has a male strap member which has a longitudinal axis, distal end portion and in intermediate  portion.   The  female member  has  an aperture  formed therein dimensioned to receive the  strap member, a strap engaging portion adjacent to the aperture for restraining movement of the strap member, a slot extending through  an outer  edge  of  the  female  member  and  in communication with apertures for guiding the strap member into engagement with the strap engaging portion and a protrusion extending inwardly from the outer edge of the female member for preventing the strap in the aperture from moving into the slot.   The strap distal end portion releasably engages the strap intermediate portion.
Patent CA-2043985-A1 (CA)
Title: Gravel scarifying and levelling device
Inventor: SCOTT NORMAN L
IPC: E01C23/06
Filed: 1991-06-06
Abstract: TITLE       GRAVEL SCARIFYING AND LEVELLING DEVICE                         ABSTRACT            A scarifier/grader apparatus comprises, in combination, a tractor connected through a 3-point hitch to a scarifier/grader attachment wherein: the tractor is adapted to be operably connected through a three point hitch to a scarifier/grader attachment comprising a scarifier including hydraulics for raising and lowering a plurality of scarifying teeth borne thereon; a grading blade having a mold board and a cutting edge a second frame interconnecting the scarifier frame and the blade in mutually spaced apart relation with the scarifier in operably leading relation and the blade in operably trailing relation, wherein the scarifier includes height-adjusting hydraulics for selectively raising and lowering the plurality of scarifying teeth borne thereon relative to the cutting edge.
Patent CA-2044220-A1 (CA)
Inventor: KAHKIPURO MATTI
IPC: H02P21/12
Filed: 1991-06-07
Abstract: Procedure for regulating the stator flux and torque of an asynchronous motor by vector control in an imaginary space vector coordinate system, in which procedure the absolute value (¦?s¦) of the stator flux and the torque (M) are determined in said coordinate system, and in which procedure the calculation coordinates are in such a position that the rotor flux (?r) is at least close to the real axis. In the procedure of the invention, the absolute value of the stator flux (¦?s¦) is regulated by means of the real part (usr) of the stator voltage and the torque (M) by means of the stator frequency (fs) The calculation coordinates are held in said position by adjusting the imaginary part (Usi) of the stator voltage.