baber/WOPTO huggingface dataset:
Patent CA-2047371-A1 (CA)
Title: Black level compensation circuit
Inventor: SADAMATSU HIDEAKI
IPC: H04N9/73
Filed: 1991-07-18
Abstract: A black compensation circuit for compensating a luminance signal which is subjected to edge enhancement, comprises: a black-level expanding circuit responsive to a control signal and the luminance signal for performing expansion of a tone of a black portion of the luminance signal and for performing conversion of the luminance signal into a black-level expanded signal in the absence of the control signal; a low-pass filter circuit for low-pass filtering the luminance signal to remove high frequency components; a detection circuit responsive to an output of the low-pass filter circuit for detecting the blackest level for a given interval; and a comparing circuit for comparing the blackest level with a given level to produce the control signal, thereby the black-level expanding circuit stopping the expansion and the conversion in the presence of the control signal.  The blackest level does not change with sharpness because after the luminance signal subjected to edge enhancement is passed through the low-pass filter, it is sent to the detection circuit.  An input signal of the low-pass filter may be supplied from the black-level expanding circuit.
Patent CA-2052083-A1 (CA)
Title: Roofing Shingles and Method of Making Same
Inventor: KOSCHITZKY HENRY
IPC: E04D1/20
Filed: 1991-09-23
Abstract: A method of making roofing shingles in several lanes in which, after the asphalt saturated base sheet is covered with a first granule layer, a pattern of asphalt patches is printed on each lane and contrasting colour granules are adhered to the patches.  Each patch pattern repeats each shingle length but is non-symmetric about the centre line of the length of each shingle. When the sheet is cut into shingles, the shingles from each lane have a different patch pattern from the other lanes. The shingles are assembled in bundles containing shingles from at least two lanes and approximately equal numbers of the patch patterns are located on opposite sides of the bundle to make sure the bundle is not tilted. The patch pattern is such that when each shingle is cut into tabs (thirds), at least one and preferably two tabs from each shingle has its centre free of patches, enabling the tab to bend over a ridge with less risk of cracking. Preferably no patches are located at the lines where the shingles are cut into tabs.
Patent CA-2052607-A1 (CA)
Title: Bar soap holder
Inventor: LAFONTAINE ROY A
IPC: A47K5/05
Filed: 1991-10-01
Abstract: 13685.0003 ABSTRACT           A holder for a bar of soap.  The holder comprises a single piece of elongate flexible material including two members integrally connected at one end and which may be spread apart at the other end for insertion of a bar of soap, the members being biased to hold the soap therebetween whereby the soap may be suspended free from constant water/dampness contact so that the soap life may be extended.  One of the members extends outwardly from the other member a distance greater than the thickness of a bar of soap to be held therebetween before extending inwardly toward the other member at the other end so as to evenly and effectively distribute the stress and/or tension of bending along a long portion of the single piece to enhance the ability of the holder to spring back to a closed position upon removal of a bar of soap therefrom.  One of the members is provided with a projecting point for piercingly engaging a slippery bar of soap inserted between the members.
Patent CA-2052737-A1 (CA)
Inventor: YAMAGUCHI KOJI
IPC: C21C7/10
Filed: 1991-10-03
Abstract: A method of producing an ultra-low-carbon steel by using a vacuum degasser on a molten steel has the steps of conducting vacuum decarburization to attain a predetermined level of carbon content,  e.g.,  25 ppm or below,  in the molten steel while progressively reducing the pressure in said vacuum degasser, conducting addition of hydrogen in which hydrogen is dissolved in  said molten steel while said pressure is temporarily elevated to 20 Torr or above, and conducting  final  decarburization  after  reducing  said pressure to 2 Torr or below.  The addition of hydrogen may be conducted to meet the following conditions:     [H]  ? ([C] - [C]final)/5 ?  + 4 wherein [H] represents the hydrogen content (ppm) in said molten  steel  in  the  state  after  the  addition  of hydrogen,  [C] represents the carbon content (ppm) in the molten steel in the state after the addition of hydrogen, and [C]final represents the final carbon content (ppm) to be obtained.
Patent CA-2057185-A1 (CA)
Title: Treatment of metal bearing mineral material
Inventor: ANDERSON CORBY G
IPC: C22B3/08
Filed: 1991-12-06
Abstract: ABSTRACT OF THE DISCLOSURE      A process for extracting silver, copper, zinc, arsenic and iron from sulfide materials by leaching under relatively mild oxygen pressure and temperature conditions with sulfuric acid and sodium nitrite.     ld-3474I
Patent CA-2060098-A1 (CA)
Title: Frequency multiplex optical fibre communication process and network
Inventor: AUDOUIN OLIVIER
IPC: H04B10/572
Filed: 1992-01-23
Abstract: Transmission frequencies (F(1)...F(2P)) used for simultaneous communications form a stack stretching from a fixed base frequency (F(0)) to a stack top (F(2P-1), F(2P)). At the start of each communication, a transmission frequency (F(2P-1)) used for this communication is at the top of the stack. During the communication, this frequency is maintained by slaving to a predetermined spectral interval (DF) beyond a lower support frequency (F(2P-2)) if such a frequency can be detected. Otherwise, the transmission frequency is shifted gradually towards the base frequency. 
<??>The invention applies in particular to communications between peripherals of computer systems. 
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Patent CA-2063830-A1 (CA)
Title: Apparatus and microbase for surface-enhanced raman spectroscopy system and method for producing same
Inventor: MILNE CHRISTOPHER GEORGE
IPC: G01J3/44
Filed: 1990-07-27
Abstract: A surface-enhanced Raman spectroscopy (SERS) assembly comprises a radiant energy source for directing a beam of radiant energy toward a target microbase. The target microbase includes a substrate, a roughened surface layer contiguously disposed on the substrate, and a sample-adsorption surface layer contiguously disposed on the first roughened layer. The sample-adsorption surface layer is effective to enhance a scattered Raman signal intensity for adsorbates adjacent the sample-adsorption surface layer by a factor of greater than 106 times. The sample-adsorption surface includes a plurality of submicron needles having a length of at least 3500 angstroms and a width of at least 500 angstroms. A method for manufacturing the target microbase comprises the steps of contiguously depositing on a substrate the first roughened layer having a deposited thickness of at least 1700 angstroms. A further metallic layer is then contiguously grown on the first roughened layer to form needles modeled as prolate spheroids having a length of at least 3500 angstroms and a width of at least 500 angstroms.  In a specific embodiment, the needles are silver microneedles deposited from a vapor with a closed chamber and a vacuum pressure of at least 10-4 torr and at an evaporation rate from 2 to 20 angstroms per second. The silver microneedles are formed at a deposited thickness of at least 4000 angstroms as determined by a standard quartz thickness monitor.
Patent CA-2064294-A1 (CA)
Title: Padded straps for garments and method of making same
Inventor: HYAMS AL
IPC: A41F15/00
Filed: 1992-03-27
Abstract: PADDED STRAPS FOR GARMENTS AND METHOD OF MAKING SAME     Abstract of the Invention A padded strap for brassieres and similar garments that includes an integral molded pad portion. The strap, including the pad, is suitable for forming the load-bearing straps of the garment while presenting an attractive, smooth and seam-free outer appearance and also being free of seams along the wearer's skin.  The padded strap of the invention also may be used as a separate pad for a conventional strap by attaching appropriate hooks or other hardware to the ends of the strap.  A method for forming a strap according to the invention is also disclosed.  The method includes laminating selected fabrics to a resilient core to form a laminated sandwich, molding the sandwich under pressure and temperature to compress a portion and leave an uncompressed portion to form a pad portion, cooling the molded sandwich in a curved position to induce a curved set, cutting the molded sandwich to size to form a strap, and securing the strap to a garment.
Patent CA-2065087-A1 (CA)
Title: Process for the preparation of sterically hindered hydroxybenzylphosphonates
Inventor: KAINMUELLER THOMAS
IPC: C07B61/00
Filed: 1992-04-03
Abstract: A process for the preparation of hydroxybenzylphosphonates of formula   by reacting a Mannich base of formula   with a trialkyl phosphite of formula   wherein R1 and R2 are each independently of the other C1-C12alkyl or C5-C7cycloalkyl, R3 and R4 are each independently of the other C1-C12alkyl or, when taken together, form a piperidinyl or morpholinyl radical, and R5, R6 and R7 are each independently of one another C1-C4alkyl, which reaction is carried out in the presence of a carboxylic anhydride (IV). The compounds of formula I may suitably be used as processing stabilisers for plastics.
Patent CA-2068776-A1 (CA)
Title: Scroll type fluid displacement apparatus having a capacity control mechanism
Inventor: IIZUKA JIRO
IPC: F04C18/02
Filed: 1992-05-15
Abstract: A scroll type fluid displacement apparatus, in particular, a scroll type compressor, is disclosed.  The apparatus includes a pair of scroll members at an angular and radial offset for forming fluid pockets, each scroll member having a spiral element.  A bypass hole is provided on a wall of at least one of the spiral elements of the scroll members for communicating between the fluid pockets and a suction chamber.  A valve mechanism, which operates in a radial direction, controls the opening and closing of the bypass hole.  The valve mechanism is responsive to the rotational motion of the scroll members and/or the pressure in at least one of the fluid pockets.  When the apparatus is driven at excessive speed, the valve mechanism operates in response to centrifugal force to open the bypass hole.  The compressed fluid in the fluid pockets then is released into the suction chamber through the opened bypass hole, and the compression capacity is reduced to a proper value.          Additionally, when the pressure in the fluid pockets becomes excessive, the valve mechanism operates to open the bypass hole to thereby decrease the pressure a proper value.
Patent CA-2070417-A1 (CA)
Title: Method for the mounting of underground pipelines
Inventor: ILOMAEKI VALTO
IPC: E21D9/12
Filed: 1990-10-25
Abstract: A method for mounting pipelines (8) or outer walls of a tunnel in the ground where one after another joined polygon or round cylinders are forced to penetrate into the ground when the soil cut by the front edge of the first cylinder (2) moves into the said cylinders during tunnelling. The cylinders (2, 3, 4, 15) containing soil are replaced by the final pipe/piping (8) meant for the ground, by forcing and/or pulling said pipe/piping in the place of said cylinders and the soil excavated from the tunnel is removed from the tunnel inside the said cylinders when said cylinders are forced out of the tunnel.
Patent CA-2071047-A1 (CA)
Title: Beverage package and a method of forming such a package
Inventor: PURDHAM ROBERT
IPC: B65D23/00
Filed: 1992-06-11
Abstract: A sealed beverage package has a bottle 1, a neck 4 of which provides a narrow mouth 5. A hollow insert 7 is submerged in beverage 13 in the bottle. A headspace 14 in the bottle is at a pressure greater than atmospheric and when the package is opened to de-pressurise the headspace 14, gas and/or liquid under pressure in the insert 7 is ejected through an aperture 8 into the beverage to cause a head of froth to develop on the beverage 13. The insert 7 is retained in position by an open framework 9 of struts which extend between the insert and a retaining ring 11 that frictionally engages in a bore 6 adjacent to the mouth 5 of the bottle. The insert 7 can be attached to the framework 9 or formed integral therewith.
Patent CA-2073446-A1 (CA)
Inventor: KEHNE HEINZ
IPC: A01N47/36
Filed: 1990-12-24
Abstract: Compounds of formula (I), where R1, R2, n, W, R3 and A are as defined in claim 1, are suitable for use as herbicides and plant growth regulators. They can be produced by a process similar to known processes. To produce them, new com-pounds of formula (II) are reacted with a carbamate of formula R*-O-CO-NR3A, where R3 stands for phenyl or alkyl. The compounds of formula (II) can be obtained from the corresponding sulphochlorides.
Patent CA-2076326-A1 (CA)
Inventor: FOLEY DANIEL M
IPC: A01C7/20
Filed: 1992-08-18
Abstract: A plurality or parallel arm type openers are mounted on a frame tube, and a rockshaft is supported directly below the tube.  Adjacent each of the openers, a lever arm is fixed for rotation with the rockshaft and, upon rotation of the rockshaft in a first direction, the lever arm engages the parallel arms to lift the opener while the frame tube remains stationary in the vertical direction.  A tension spring assembly connected between the parallel arms and the lever arm applies varying down force when the opener is lowered by rotating the rockshaft in the opposite direction.  The amount of down pressure can be adjusted for varying conditions by rotation of the rockshaft, and adjustment can be made on-the-go from the tractor cab to compensate for changing ground conditions in a given field.  Locking structure on the row units permits selective lock-up of row units with a single cycle of the hydraulic lift system.
Patent CA-2077696-A1 (CA)
Inventor: HACHEZ REJEAN
IPC: F25B45/00
Filed: 1992-09-08
Abstract: Précis Le fréon a été formellement identifié comme le principal agent de destruction de la couche d'ozone de l'atmosphère. La manipulation de ce gaz est maintenant bien réglementée. Dans le domaine de la réfrigération en particulier, on retrouve encore une utilisation abondante et permise de ce gaz. Lors de la réparation, de l'entretien ou de la vérification de ces systèmes on doit toutefois retirer ce gaz afin d'éviter toute fuite dans l'atmosphère. Quand les travaux sont terminés, on réintroduit le fréon dans le système. La présente invention concerne justement ce procédé de pompage et de réinsertion.     On effectue ce travail en utilisant le principe des vases communicants sans pièce mécanique en contact avec le fréon. Plus précisément, on effectue un abaissement de la pression d'un réservoir ouvert au gaz à pomper en l'occurrence dans ce cas, le fréon. Cette dépressurisation s'effectue à l'aide d'une thermopompe. La réinsertion du gaz dans le système s'effectue simplement en inversant le thermopompage et en réélevant la pression à l'intérieur du réservoir.
Patent CA-2078742-A1 (CA)
Title: Hydraulic power system having first and second power converters
Inventor: STONE STEPHEN R
IPC: B25H1/00
Filed: 1992-09-21
Abstract: A hydraulic power system having first and second hydraulic power converters in which the speed of the second power converter is proportional to the speed of the first power converter. The first hydraulic power converter includes a plurality of hydraulic power producing elements. At least one of the power producing elements provides power for power driving, and at least one of the power producing elements pumps hydraulic fluid. The hydraulic fluid is connected to and drives the second hydraulic power converter at a speed proportional to the speed of the first power converter.
Patent CA-2080530-A1 (CA)
Title: Dynamic networking
Inventor: CHIU HO K
IPC: H04L12/18
Filed: 1992-10-14
Abstract: ABSTRACT          A computer conferencing system permits individual workstations, capable of communication with other stations by means of telecommunication or network links of diverse types, to participate in a conference through a dynamic network which they may enter or leave at will.   Each participating station must be able to establish at least one  and preferably  at  least  two  independent  physical communication links with other stations, and maintains a network routing table storing data as to other stations to which it is logically connected directly or indirectly through stations to which it is physically connected.  on establishing a physical connection to another station it transmits data to that station based on the content of its routing table and receives data based on the content of the other station's routing table.  It also transmits, to other stations to which it is logically connected, data relative to changes in its logical status, and receives data as to changes in the logical status of other stations within the network, and updates its routing table accordingly.
Patent CA-2081277-A1 (CA)
Title: Process for the use of igneous magma from vulcanoes to melt and regenerate worn out and recycled metals
Inventor: DE SOUSA PORTUGAL MANUEL
IPC: B09B1/00
Filed: 1992-10-23
Abstract: ABSTRACT             "PROCESS FOR THE USE OF IGNEOUS MAGMA FROM VULCANOES TO MELT      AND REGENERATE WORN OUT AND RECYCLED METALS"            The present invention relates to a process for the utilization of the very high temperatures of magma from vulcanoes for melting metals and regrouping their molecules in its original arrangement as they were before being utilized in industry.     After all the scrap metal is dumped into the crater, the rupture of the solid layer of magma will be done by triggering explosive bombs previously deposited over the scrap metal.     Once freed by the explosion the magma will ascend, melting the scrap metal and dragging it together to outside the crater. The magma with the melt scrap metal, can be conducted through tunnels to the interior of chambers dug inside the mountain for a slower cooling.     Before the surface of the magma hardens in contact with air, very polluting atomic ashes and chemical industry residuals can be thrown into the crater.     The periodical opening of the vulcanoes shall eliminate the possibility of violent and destructive eruptions.
Patent CA-2083843-A1 (CA)
Title: Method for tilling a field
Inventor: MUELLER MANFRED
IPC: A01G13/02
Filed: 1992-03-26
Abstract: In order to make it possible to cultivate a field using mechanized or automated means with due regard for the environment, the invention proposes that the seed is spread on the untilled ground and covered with a layer of compostable material. The layer may, for instance, consist of mats (7) made of straw, litter, mulch or mixtures of these.
Patent CA-2085073-A1 (CA)
Inventor: SHIRAYANAGI RYUTARO
IPC: D04H1/56
Filed: 1992-12-10
Abstract: ABSTRACT OF THE DISCLOSURE       The invention provides a melt-blown non-woven fabric obtained by melt-blown an ethylene-? -olefin copolymer having a density of smaller than 0.900 g/cm3 and a crystallinity of from 5 to 40% or by melt-blowing a resin composition which chiefly comprises said copolymer, a laminated non-woven fabric obtained by laminating as a unitary structure a dry-type non-woven fabric on the melt-blown fabric that is obtained by melt-blowing said copolymer or the resin composition which chiefly comprises said copolymer, and a cataplasm which comprises the non-woven fabric obtained by melt blowing said copolymer or said resin composition which chiefly comprises said copolymer, a dry-type non-woven fabric laminated on said melt-blown non-woven fabric, and a medicine layer applied onto said dry-type non-woven fabric.  The non-woven fabric or the laminated non-woven fabric has excellent elastic property, i.e., excellent elasticity under the two-dimensional condition, and exhibit excellent fitness to the curved portions and to the stretched or contracted portions. The invention further provides a non-woven fabric obtained by melt-blowing a resin composition which contains 98 to 40% by weight of a polypropylene and 2 to 60% by weight of an ethylene-?-olefin copolymer having a density of smaller than 0.900 g/cm3 and a crystallinity of from 5 to 40%, and a laminated non-woven fabric material using the above non-woven fabric, featuring excellent softness and heat-adhesiveness at low temperatures as well as easy heat-working such as heat-embossing.
Patent CA-2085359-A1 (CA)
Title: Rechauffeurs reutilisables du genre employant une solution surfondue et un activateur
Inventor: MANKER CHARLES F
IPC: F24V30/00
Filed: 1991-06-14
Abstract: Vessies chauffantes réutilisables du type contenant une solution sursaturée, pratiquement exempte de déplacement du liquide vers le bas. Lesdites vessies chauffantes conservent également plus longtemps une température située dans un éventail de températures thérapeutiquement utiles. Elles gardent en outre un degré de souplesse considérable pendant leur cycle de chaleur utile. Lesdites vessies chauffantes réutilisables comportent une enveloppe souple contenant une eau de sel surfondue, un activateur destiné à faire démarer la cristallisation de ladite eau de sel surfondue et un agent gélifiant, ledit agent gélifiant étant présent en quantité suffisante pour transformer l'eau de sel en gel.
Patent CA-2088079-A1 (CA)
Inventor: CONRAD HANS-ROLF
IPC: D21G1/00
Filed: 1993-01-26
Abstract: A cylinder machine, in particular calender, has a cooling device for the edge region (9, 10) of a flexible cylinder (1). It is fitted on a support (12, 12a) which can be moved parallel to the cylinder axis by means of an actuating motor (13, 13a). A sensor (14, 14a) offset towards the cylinder centre detects the web edge (7). The actuating motor (13, 13a) displaces the support (12, 12a) in dependence on the sensor signals, such that the sensor (14, 14a) remains in the region of the web edge (7). In this way, it is ensured that the edge region (9, 10) is cooled to a sufficient degree, even when the web width (B) is changed or when changing the web. 
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Patent CA-2088333-A1 (CA)
Title: Method for controlling advanced-function universal personal telecommunication services
Inventor: YUNOKI HIDEO
IPC: H04Q3/54
Filed: 1993-01-28
Abstract: An exchange control portion and a service control portion are provided on the exchange network' side.      The service control portion is provided with a PTN management table. When a subscriber dials a special number, the service control portion is activated.      Thus, the service control portion sends to the subscriber a command for requesting him to input his PTN. When the subscriber inputs information identifying his PTN, the service control portion controls data relevant to the subscriber. When the service control portion receives the PTN of a receiving subscriber according to the input command thereof, it detects the telephone number of the receiving subscriber using the PTN management table.      Thereby, the exchange control portion connects the subscriber to the receiving subscriber using the telephone number received or detected.