baber/WOPTO huggingface dataset:
Patent CA-1065671-A (CA)
Inventor: MCCABE FRANCIS J
IPC: F24F13/15
Filed: 1977-02-18
Granted: 1979-11-06
Abstract: Abstract of the Disclosure A novel fire, smoke and air control damper is disclosed wherein one or more hook-shaped hinge portions formed intermediate between the longitudinal edges of each damper blade engage complementally configured hook-shaped hinge elements formed on opposite sides of the damper frame. Formed on each of the ends of each damper blade are additional hook-shaped sealing portions which are adapted to mate with the hook-shaped sealing portions of adjacent blades in the closed position in order to form a double seal.  A "dead" air chamber is formed between contiguous portions of adjacent blades when those blades are in the closed position.  As the blades are slightly displaced towards the open position, a seal is none-theless maintained between the blades due to the configuration of the sealing portions thereof.  As the blades are further displaced, a serpentine air path is formed having a maximum fluid frictional resistance. which resistance is further amplified by the provision of a spoiler disposed adjacent to the tip of each hook-shaped sealing portion of each blade. Finally, the blades are movable to any of a variety of open positions so that volume control is easily   effectuated.          In the closed position, various blade portions also engage opposite sides of an inwardly depending flange in said frame to form a seal therebetween, thereby providing a positive pressure resistant seal.
Patent CA-1116532-A (CA)
Inventor: PELLAR RONALD J
IPC: H04N1/00
Filed: 1977-04-21
Granted: 1982-01-19
Abstract: ELECTRONIC HALFTONE GENERATOR     ABSTRACT OF THE DISCLOSURE Method and apparatus for scanning a document original, either black and white or color, and reproducing a corres-ponding halftone reproduction thereof either locally or at a remote location.  A halftone signal is generated by pulse width modulating or comparing the scanned, or video, signal with a periodic signal having two frequencies and phases to create a dot pattern output which is a function of the frequency and phase of the two combined modulating signals.          The halftone reproduction generated has variable dot con-figurations that are controllable to enable both rotation of the dot pattern (screen angle) and geometric modifications of the dot pattern.  If the document original is in color, light of three different colors is caused to scan the document, each resultant video signal being processed in a manner as set forth hereinabove.  In a preferred embodiment, different screen angles are utilized for each color that comprises the reproduction.
Patent CA-1071848-A (CA)
Inventor: BROWN DWIGHT C
IPC: A44B99/00
Filed: 1977-05-06
Granted: 1980-02-19
Abstract: COMBINATION PLASTIC AND METAL PAPER CLIP                ABSTRACT OF THE DISCLOSURE         A paper clip is disclosed for clampingly engaging at least two sheets of paper.  The paper clip includes a semi-rigid plastic body member, substantially U-shaped in longitudinal cross-section, having a pair of legs presenting two substantially planar interior surfaces relatively posi-tioned such that at least two paper sheets may be clamped therebetween, one leg being longer than the other.  A longitudinally extending substantially rigid but slightly flexible metal member, of substantially narrower transverse cross-section than that of the body member, is fixedly secured to the body away from the interior surfaces thereof so as to present only those planar surfaces to paper sheets clamped therebetween.  The metal member may be a rod or strip and may be embedded in the body member or secured to the exterior surfaces of the body member.  The metal member is not coextensive with the part of the longer leg which extends the other leg, so that part of the longer leg is more flexible than any part secured to the metal member.          Also, the interior surfaces of the body member may be coated with an abrasive material or roughened to increase the effective clamping hold of the clip.
Patent CA-1092439-A (CA)
Inventor: HAREN DOYLE V
IPC: B41N7/06
Filed: 1977-05-19
Granted: 1980-12-30
Abstract: ABSTRACT OF THE DISCLOSURE   A substantially non-misting inking roll and a method of making the same are provided.  The roll comprises a cylindrical support means and a microporous cylindrical member supported by the support means.  The micro-porous cylindrical member has an outer ink-applying surface and a special ink formulation disposed therein.  The ink formulation comprises a printing ink having a thickening substance in the form of a plastisol formed by mix-ing vinyl resin, dioctyl azelate and dioctyl phthalate dispersed therethrough. A solidified thermally responsive coating of some of the thickening substance appears on the microporous cylindrical member.  Because the coating serving as an antomatic flow restrictor controlling the flow of the ink formulation from the ink-applying surface by reducing flow area of the passage in direct proportion to an increase in temperature, this substantially eliminating misting of the roll due to temperature.  The roll is thus particularly adapted to be used at comparatively high rotational speeds and/or tempera-tures.
Patent CA-1085046-A (CA)
Inventor: MAGOS GABOR
IPC: H03K17/735
Filed: 1977-05-27
Granted: 1980-09-02
Abstract: ABSTRACT OF THE DISCLOSURE     Circuit arrangement for the shaded(gray-scale) displaying of images on display boards having individual luminous elements arranged in a matrix, wherein switching circuits of the luminous elements are connected to row and column bars, and each bar is coupled to a selecting circuit either directly or through a store element.  Each switching circuit includes an analog memory, a comparator with a con-stant threshold level, and a power switch.  The memory is preferably a capacitor which is connected - over a switching element - between the respective row bar and column bar. A function generator supplying a monotonously varying periodic signal is connected to the bars that are directly connected to the capacitors whereas a video-signal transmitter is con-nected to the bars that are linked to the switching elements.
Patent CA-1073893-A (CA)
Inventor: MARGUERATT OATWAY
IPC: B66F13/00
Filed: 1977-06-20
Granted: 1980-03-18
Abstract: RESILIENTLY FOUR-WAY TILTABLE VEHICLE JACK BASE            Abstract of the Disclosure A resiliently tiltable load supporting base for vehicle jacks is described.  The base has a ground engaging base plate having a substantially flat bottom with a convex dome formed at the center thereof.  This base has a peripheral stiffening rim with a vertical edge merging into a flared skirt.  A load receiving plate with a flat top and down-turned peripheral edge is mounted within the base.  This load receiving plate has a socket for holding a screw jack post, the bottom wall of the socket having a concave depression pressed into the lower face thereof which rests on the base plate dome.  The base plate and load receiving plate are retained together by means of a pin extending through the dome.  Hard rubber blocks are mounted between the plates, and are uniformly spaced around the socket to maintain the plates in parallel relationship, while permitting some resilient tilting of a vehicle jack with respect to the base plate.
Patent CA-1086313-A (CA)
Inventor: LODIGE WILHELM
IPC: C08B11/02
Filed: 1977-08-05
Granted: 1980-09-23
Abstract: PROCESS FOR THE PREPARATION OF CELLULOSE ALKYL ETHERS                 ABSTRACT OF THE DISCLOSURE          The present invention is related to a new process for producing cellulose C1-C4-alkyl ethers by subjecting cellulose to reaction with an alkali metal hydroxide and subjecting the resulting alkali metal salt of cellulose to reaction with an alkyl halide wherein the alkyl group contains 1 to 4 carbon atoms. The new process is characterized by subjecting 1 part by weight of cellulose to reaction with 0.5 to4parts by weight of the alkyl halide in a positive mixer having a fast-running mixing appliance and a container with adjustable internal pressure and cooling of the internal container wall, adding the alkali metal hydroxide in a concentrated aqueous solution or in a substantially water-free and finely divided state, and adjusting the pressure in the reaction vessel with cooling in such a way that the temperature of the reaction mixture remains in the range of from 15 to 40°C., and raising the temperature of the reaction mixture after termi-nation of the alkalization to from 50 to 100°C.                             - 1a -
Patent CA-1085871-A (CA)
Inventor: SCHULZ J GUSTAV
IPC: C07C63/00
Filed: 1977-09-28
Granted: 1980-09-16
Abstract: ABSTRACT OF THE DISCLOSURE     This invention provides novel mixtures of polycyclic aromatic polycarboxylic acids carrying nuclear nitro groups, that are substantially soluble in acetone but substantially insoluble in water, and are useful in esterification reactions, and effective as blowing agents in well-known resins.  The mixture is prepared by subjecting a slurry containing coal to reaction with aqueous nitric acid under specified reaction conditions, mechanically separating the solids in the resulting slurry, extracting the solids with a polar solvent, and separating the polar solvent from the extract to recover the desired carboxylic mixture.
Patent CA-1082492-A (CA)
Inventor: YOUDELIS WILLIAM V
IPC: C22C9/00
Filed: 1977-12-15
Granted: 1980-07-29
Abstract: ABSTRACT OF THE DISCLOSURE      A silver-copper-germanium base alloy is disclosed consisting by weight of 40 to 85 % silver, 15 to 60 % copper and 0.1 to 10 % germanium.  Optionally, up to 15% by weight of the base alloy may be replaced with tin and up to 10% by weight of at least one of gold, palladium and platinum. The presence of germanium in the alloy virtually eliminates oxidation of the melt during the melting and casting of the alloy and thereby also improves resistance to tarnishing when the alloy is used in an oral environment.
Patent CA-1092210-A (CA)
Inventor: VOSER OTHMAR
IPC: B01J20/22
Filed: 1978-01-11
Granted: 1980-12-23
Abstract: ABSTRACT OF THE DISCLOSURE:      A high frequency coaxial cable for aerial and ultra-high-frequency lines, comprising a metal internal conductor, a plastic dielectric concentrically surrounding the internal conduc-tor, an external conductor surrounding the dielectric and compris-ing a metal wire mesh and plastic foil strip metallised on at least one side, and a plastic sheath enveloping the external conductor as an external protective cover, the wires of the wire mesh being arranged in netlike configuration to define an open wire mesh deposited on the dielectric and the plastic foil strip being applied on the wire mesh in helical edgewise overlapping windings with the metallised side facing the wire mesh and being pressed into each single mesh of the wire mesh in the form of a generally trough-like dent thereby short-circuiting each single mesh of the wire mesh. And, a method of producing a high fre-quency coaxial cable for aerial and ultra-high frequency lines.
Patent CA-1054330-A (CA)
Inventor: NAZ PAUL
IPC: E04F13/08
Filed: 1978-01-24
Granted: 1979-05-15
Abstract: SELF-COMPENSATING SIDING OR ROOFING STRIP                     ABSTRACT OF DISCLOSURE     An integrally formed, interlocking siding or roofing strip for covering a surface of a building. The strip includes a central panel, a lower spacing element, an upper assembly for operatively engaging the lower spacing element of another strip to be installed so as to interlock the stripes in a partially overlapping manner, one above the other. The top end portion of the strip is provided with a plurality of generally vertically aligned corrugations having alternate ridge and valley portions. Fastening elements penetrate some of the valley and/or ridge portions to securely anchor the strips to the building surface. The corrugations serve (1) to compensate for expansions and contractions caused by aging and/or weather variations and (2) to continually bias the fastening elements to tightly anchor the strip to the surface in a spring-like manner thereby preventing the strips from becoming loose and eliminating noise and rattling. The corrugations may be provided with a plurality of apertures for operatively receiving the fastening elements and the thickness of the top end portion which is corrugated may be less than the thickness of the central panel to facilitate the compensation function of the corrugations.
Patent CA-1086808-A (CA)
Inventor: GLASS KENNETH H B
IPC: F16C33/10
Filed: 1978-03-09
Granted: 1980-09-30
Abstract: ABSTRACT OF THE DISCLOSURE     SPHERICAL BEARING ASSEMBLY WITH SNAP-IN SWIVEL CONTACT                          CAPABILITY          There is provided a self-aligning bearing assembly for a motor.  The bearing assembly includes a housing member for securing to the motor, the housing member defin-ing a bearing seat within a recess cavity larger than the bearing seat.  A spherical bearing is seated in the seat, and a porous oil-retaining pad surrounds the bearing.  A spring element with a central opening is in contact with the spherical bearing remote from the seat, and a closure member for the recess in the housing member is provided to enclose the pad, the spherical bearing, and the spring.          The closure member and the housing member have a snap-fit together, the snap-fit being provided by outwardly project-ing elongate ribs on one of the members, and elongate recesses on the other.  The recesses are wider than the ribs, so that a certain degree of play between them is possible.
Patent CA-1090829-A (CA)
Inventor: HORT EUGENE V
IPC: C07C29/17
Filed: 1978-03-21
Granted: 1980-12-02
Abstract: ABSTRACT In the prior art it has been attempted to hydrogenate butynediol to butenediol.  However such processes were not as efficient as possible in that there were low yields of product, substantial amounts of volatile side products, and did not provide a high yield of the preferred cis isomer The present invention seeks to overcome these drawbacks by providing a process for the production of butenediol in high yield by partial catalytic hydrogenation of butynediol which comprises: reacting an aqueous solution of butynediol, at a concentration of about 10-50% by weight of said solution with hydrogen, in the presence of a catalyst, in the amount of about 0.1-10% by weight of said butynediol, said cataiyst consisting essentially of palladium, in the amount of-about 0.5-15% by weight of said catalyst, and lead in an atomic ratio of lead to palladium of at least 0.03, on a transistional alumina powder support, at a temperature of about 30-70°C. and a pressure ranging from atmospheric to about 300 psig.
Patent CA-1088415-A (CA)
Inventor: WIDMYER RICHARD H
IPC: E21B43/16
Filed: 1978-04-03
Granted: 1980-10-28
Abstract: THERMAL OIL RECOVERY METHOD         (D#73,334-F) ABSTRACT OF THE DISCLOSURE         Heavy  or  viscous  oils  may  be  recovered  from subterranean deposits by one or more wells each of which is provided with at least two separate communication means from the surface of the earth, one in fluid communication with the upper part of the formation and the other well being in fluid communication with the lower part of the formation, each of said communication means being completed so as to permit injection of steam or mixtures of steam and other materials into the formation and production of heated viscous petroleum therefrom.   The  oil  recovery  process  comprises  several separate  phases  of  operation.   In  the  first,  steam  is injected into the formation using both communication means simultaneously for a period of time followed by a soak period if desired, followed by production of heated oil from both parts  of  the  formation  using  both  communication  means simultaneously.  In the second phase, steam is injected into only one of the communication means, which may be the one in communication with either the top or bottom part of the formation,  and  oil  production  is  taken  from the  other communication means.   This  is  followed by a reversal of injection-production  sequences,   the  process  effectively pressure pulsing the formation to improve the distance into the formation that the push-pull steam injection process is effective.     -I-
Patent CA-1087828-A (CA)
Inventor: MENNUTO ANTHONY R
IPC: E06B3/76
Filed: 1978-04-18
Granted: 1980-10-21
Abstract: ABSTRACT OF THE DISCLOSURE         A panel assembly of the type having a pair of panels arranged in spaced relation to each other includes longitudinally extending side caps and means associated therewith for retaining the panels in the side caps.  The panels are fabricated to a standard size and trimmed to a required utilization size, with the side caps and retaining means imparting a finishing and strengthening effect to the panel assembly.
Patent CA-1080210-A (CA)
Inventor: SJOBERG AKE L
IPC: B62B3/10
Filed: 1978-04-19
Granted: 1980-06-24
Abstract: ABSTRACT OF THE DISCLOSURE           A trolley for carrying a breaker or similar percussion or drilling tool.  The trolley has a stand for carrying the tool with a handle at the top and front wheels at the bottom.  Rear wheels are provided, linked to the stand with a wheel support shaft and at least one spring-biased, telescopic brace.  The brace can be locked in different positions to position the rear wheels in different positions, and thus balance the trolley in different operating positions.
Patent CA-1103305-A (CA)
Title: Stepping motor excitation
Inventor: KASTILAHN WILLIAM C
IPC: H02P25/08
Filed: 1978-05-08
Granted: 1981-06-16
Abstract: STEPPING MOTOR EXCITATION                   ABSTRACT OF THE DISCLOSURE           A variable reluctance motor wound for two-phase excitation is excited with single phase pulses, whereby the de-energiztion of one phase coil aids in the energiza-tion of the succeeding (and preceding) phase coil, in which a phase coil that is about to be de-energized is energized for a short period with maximum excitation energy power in order that the decay from that maximum power level, upon advance of the stepping motor, induces, by transformer action, an aiding voltage in the next succeeding phase coil so as to increase the speed of excitation of that next succeeding phase coil.
Patent CA-1071585-A (CA)
Inventor: CLARKE JOHN W
IPC: B65D81/32
Filed: 1978-05-24
Granted: 1980-02-12
Abstract: Abstract of the Disclosure A dual compartment mixing vial having a center seal isolating one compartment from the other is provided with a stopper at its open end which embodies a rod that is slidably positioned therethrough.  The rod, upon being pushed downwardly, abuts the center seal of the vial and causes it to be displaced, thereby permitting the contents of the two compartments to intermix within the closed vial.          An activating cap is provided for preventing accidental movement of the rod and to facilitate intentional movement of it.
Patent CA-1114484-A (CA)
Inventor: GILBERT LAURENCE R
IPC: F28F3/02
Filed: 1978-06-07
Granted: 1981-12-15
Abstract: ABSTRACT OF THE DISCLOSURE      The invention contemplates a highly solar-energy absorbing device wherein the surface exposed to incident solar energy is a particularly characterized roughness of an amorphous semiconductor material, the particular characterization being that of an array of outwardly projecting structural elements of relatively high aspect ratio and at effective lateral spacings which are or include those in the order of magnitude of wavelengths within the solar-energy spectrum.
Patent CA-1090968-A (CA)
Inventor: STRAWSON KENNETH H
IPC: B30B11/00
Filed: 1978-06-14
Granted: 1980-12-09
Abstract: "AN IMPROVEMENT IN OR RELATING TO MOULDING APPARATUS".     ABSTRACT OF THE DISCLOSURE Moulding apparatus including a die, a first hydraulic ram member for opening and closing the die and a second ram member, contained within the first ram member, for injecting mouldable material into the die.  The apparatus may be for moulding permanent magnet compacts in which case means may be provided for maintaining a magnetic field around the material in the die.
Patent CA-1103778-A (CA)
Inventor: HOVORKA JIRI J
IPC: G07D5/08
Filed: 1978-06-26
Granted: 1981-06-23
Abstract: MAGNETIC COIN ELEMENT SENSOR  Abstract of the Disclosure A magnetic coin element sensor for sensing, detecting and identifying coin elements and the like interposed in a magnetic field wherein the metallurgical structure of each interposed coin element causes an identifiable change in the magnetic field responsive to the metallurgical structure of the interposed coin element and uniquely indicative of the interposed coin element, the change in the magnetic field being sensed, detected and utilized to uniquely identify each of the interposed coin elements.          The magnetic coin sensor is particularly useful for identifying coins deposited in a coin handling apparatus such as a vending machine, a coin telephone or the like.
Patent CA-1116312-A (CA)
Inventor: WEYRICH CLAUS
IPC: C30B19/00
Filed: 1978-07-04
Granted: 1982-01-12
Abstract: ABSTRACT OF THE DISCLOSURE A method of depositing a plurality of epitaxial monocrystalline layers of semiconductive materials onto an individual substrate of a plural-ity of substrates via the sliding liquid phase epitaxy technique whereby the spacing between respective melt-containing chambers and respective substrate-receiving recesses are substantially equal to one another and, during the deposition stage, the temperature of all melts located on respective sub-strates is lowered a substantially identical amount so that a corresponding epitaxial layer grows on each such substrate.
Patent CA-1102299-A (CA)
Inventor: HEGEDUS LOUIS
IPC: B01D53/94
Filed: 1978-07-13
Granted: 1981-06-02
Abstract: PLATINUM-RHODIUM CATALYST FOR AUTOMOTIVE EMISSION CONTROL  Abstract of the Disclosure A 3-way layered catalyst adapted for use in a system operating at about the stoichiometric air/fuel ratio having significantly improved resistance to poisoning in automotive exhaust comprising an alumina support having a first layer of the catalyst material platinum positioned at the support surface and penetrating the body thereof to a desired depth with an inner second layer of the catalyst material rhodium, the second layer being adjacent to the first layer and penetrating the body of the support, the maximum concentration of platinum being at or near the surface of the support with the minimum concentration of rhodium in the first layer being at or close to the surface and increasing in concentration to a maximum to define the boundary between the first and second layers, the concentrations of platinum and rhodium decreasing inwardly from the boundary with the greater portion of rhodium being in the second layer.
Patent CA-1118503-A (CA)
Inventor: SAHASRABUDHE ARUN P
IPC: H03K17/795
Filed: 1978-07-24
Granted: 1982-02-16
Abstract: ABSTRACT OF THE DISCLOSURE          An improved failsafe logic function apparatus is disclosed which includes an input signal section and an output signal section, with a middle gating network section isolated from each of the input signal section and the output signal section.  An external control signal deter-mines the logic function operation of the apparatus.    CROSS REFERENCE TO RELATED APPLICATION The present application is related to a previously filed Canadian application Serial No. 269,634, filed January 13, 1977 by A. P. Sahasrabudhe and T. C. Matty, and which is assigned to the same assignee as the present application.
Patent CA-1097696-A (CA)
Inventor: KNAPP RANDY O
IPC: C03C8/04
Filed: 1978-08-02
Granted: 1981-03-17
Abstract: ABSTRACT OF THE DISCLOSURE          A high-silica ceramic glaze, having a low co-efficient of thermal expansion, suitable for application to alumina bodies, is disclosed;  The glaze consists essentially, by weight percent, of 48 to 54 percent SiO2, from 7 to 11 percent A1203, from 16-1/2 to 20 percent B2O3, from 11 to 14 percent BaO, from 2 to 3 percent CaO, from 2 to 2-1/2 percent ZnO, from 4-1/4 to 5-1/4 percent Na2O, and from 0.4 to 1 percent K2O.          Li2O and MgO to the extent of up to about 1/4 percent and 1 percent, respectively, can also be tolerated, as can minor amounts of other impurities.