baber/WOPTO huggingface dataset:
Patent CA-1047611-A (CA)
Inventor: ZEBO TIMOTHY J
IPC: H04W84/02
Filed: 1975-11-25
Granted: 1979-01-30
Abstract: Abstract of the Disclosure Known tone detectors are adversely affected by various signaling tone distorting sources, including noise as well as talk-off due to tone-like speech, e.g., due to averaging of speech frequencies over a detection interval. As a result, improper tone detection often occurs. This problem is mitigated by dividing a detection interval into a plurality of detection sub-intervals which are then concatenated for tone detection.  Detection of the desired tone in at least a predetermined number of concatenated sub-intervals is interpreted as the presence of a valid tone.  Conversely, absence of detection of the desired tone in at least a second predetermined number of concatenated sub-intervals is interpreted as the absence of a valid tone.
Patent CA-1051246-A (CA)
Inventor: AHREL BO
IPC: D21B1/16
Filed: 1976-02-23
Granted: 1979-03-27
Abstract: ABSTRACT OF THE DISCLOSURE     Method of producing mechanical pulp of improved brightness and light-scattering properties in a defibration apparatus in which wood chips or other cellulose-containing fibrous material are ground between a pair of discs which rotate relative to one another in a pressurized grinding zone.  Prior to the defibrating process, the chips are impregnated with a solution of alkali selected from the group consisting of alkaline hydroxides, alkali silicate, al-kali carbonate and alkali bicarbonate admixed with a peroxide sol-ution at a temperature below 80°C.  After removal of surplus im-pregnating solution by compression of the chips, the latter are in-troduced into a pressure vessel which is in communication with the grinding zone.  Normally, the temperature in the grinding zone ex-ceeds 100°C, which has a degrading effect on the chemical compounds, particularly on the peroxide, in the impregnated chips, resulting in a pulp of impaired brightness and light-scattering properties. In order to conteract the effect of this high temperature, compress-ed air or other inert gas, such as steam, is introduced into the pressure vessel in an amount sufficient to maintain the chips in the pressure vessel at a temperature below 90°C and to maintain a predetermined pressure within the defibrating zone.
Patent CA-1059230-A (CA)
Inventor: NAHORY ROBERT E
IPC: H01L31/109
Filed: 1976-02-26
Granted: 1979-07-24
Abstract: GROWTH AND OPERATION OF A STEP-GRADED TERNARY III-V        HETEROJUNCTION P-N DIODE PHOTODETECTOR          Abstract of the Disclosure In an infrared photodetection apparatus a photo-detector diode is used which comprises a heterojunction of two epitaxial layers of differing compositions of a ternary III-V semiconductive alloy, such that the outer layer will serve as a radiation-admitting window as well as physical protection for the underlying absorbing layer in the so-called direct photodetector diode configuration. The ternary alloy illustratively includes two metallic group III elements such as indium and gallium; but the principle can be extended to ternary alloys including two group V elements, such as arsenic and antimony.  Further, quaternary alloys of III-V elements can be employed.  The absorbing layer is selected to be substantially intrinsic.  The latter is the case for an n-type layer of InxGa(1-x)As.          Matching of this absorbing layer to a gallium arsenide substrate is achieved by a plurality of step-graded composi-tion layers of indium gallium arsenide.
Patent CA-1097477-A (CA)
Title: Process for separating so.sub.2 from a current of gas, with production of sulphuric acid by the nitric oxide process
Inventor: FATTINGER VOLKER
IPC: B01D53/77
Filed: 1976-03-08
Granted: 1981-03-17
Abstract: Case 72-9818+ Canada Process for separating SO2 from a current of gas, with production of sulphuric acid by the nitric oxide process Abstract of the Disclosure A process for separating SO2 from a current of gas, with pro-duction of sulphuric acid by the nitric oxide process in a tower system is described, in which the SO2-containing gas is introduc-ed into a denitration zone and, after passing through the latter at a nitric oxide concentration of at least 1 % by volume in the gas phase,onward into an SO2-processing zone comprising at least one packed tower, in which it is brought into intimate contact with sulphuric acid containing less than 70 % by weight of H2SO4 (dilute acid, the acid being used to absorb the nitrogen oxides in the towers downstream from the SO2-processing zone having a concentration of between 70 and 85 % by weight of H2SO4 (absorption acid): this process is improved by a)   heating the nitrose-containing acid intended for the denit-ration zone  which, relative to the direction of gas flow, is located upstream from the first tower, trickle-fed with dilute acid, of the SO2-processing zone, by indirect heat exchange to above 60°C before it comes into contact with the gas stream which leaves the denitration zone, and b)    holding the sojourn time of the gas between leaving the denitration zone and entering the first tower of the nitric oxide absorption zone, at concentrations of at least S % by volume o  SO2 and at least 10 V/o by volume of °2 in the gas entering the denitration zone, at less than 30 seconds, and, at lower SO2 contents or lower O2 contents in the said entry gas, limiting the residence time to a maximum length calculated from the  equation   in which formula Zmax is the sojourn   time in seconds, [SO2] denotes the SO2 content in the gas entering the denit-ration zone, in % by volume, and [O2] denotes the oxygen con-tent in the same entry gas, in % by volume.
Patent CA-1154779-A (CA)
Title: Process for the production of 2-aryl-2h-  benzotriazoles
Inventor: WHITE HOWARD L
IPC: C07D249/20
Filed: 1976-04-28
Granted: 1983-10-04
Abstract: Abstract of the Disclosure A process for the production of 2-aryl-2H-benzotriazoles having the formula I                         (I) comprises reducing and cyclizing the corresponding o-nitro-azobenzenes having the formula II                                         (II) with hydrogen at a temperature in the range of about 20°C to about 100°C and at a pressure in the range of about 1 atmosphere to about 66 atmospheres in an alkaline medium at a pH over 10 in the presence of a nickel catalyst, preferably molybdenum-promoted Raney nickel.  High yields of pure product are obtained directly with a concomitant reduction of undesired by-product and a reduction in effluent pollution problems.
Patent CA-1100980-A (CA)
Inventor: THURMAN DUANE E
IPC: C07C67/00
Filed: 1976-06-18
Granted: 1981-05-12
Abstract: ABSTRACT OF THE DISCLOSURE              A novel class of N-aminosulfenyl carbamate compositions have outstanding insecticidal and miti-cidal properties coupled with very low toxicity to mammals and important economic crops.
Patent CA-1078843-A (CA)
Inventor: AMSELEM ARMAND
IPC: A61K31/435
Filed: 1976-07-07
Granted: 1980-06-03
Abstract: "PROCESS FOR THE PREPARATION OF NEW THIENOPYRIDINE DERIVATIVES"     ABSTRACT OF THE DISCLOSURE    The present invention  relates to a process for the preparation of pyridine derivatives having the formula:                     ( I) in which:    R  is a phenyl radical substituted with at least an aryl, carboxy, alkoxycarbonyl, cyano, hydroxymethyl or ethylenedioxy group, a styryl, thienyl or benzhydryl radical optionally substi-tuted with at least a halogen atom or a lower alkyl, lower alkoxy, aryl, nitxo, amino, sulfonylamino, carboxy, alkoxycarbonyl, cyano, hydroxymethyl     or methylenedioxy group;          R1 and R2 repxesent each at least an atom or group selected from hydrogen, halogen anda hydroxy, lower alkyl, lower alkoxy, nitro and amino group;          R3 represents hydrogenl halogen, or a hydroxy, lower alkyl, lower alkoxy, nitro or amino group, and n is an integer from 1 to 15, and the symbols R3 may have different meanings in each radical CHR3 when n is greater than 1, and their inorganic or organic acid addition salts and quaternary ammonium derivativos,  comprising    condensing a tetrahydrothienopyridine of the formula:                                           (II) in which R1 and R2 have the above-defined meanings, with a halogen derivative of the formula:                             X - (CHR3)n-R      (III) in which X is a halogen atom, R, R3 and n have the above-defined meanings, and, if desired, hydxolysing or reducing an ester function of the resulting material, to give the compound or the formula (I).   Said derivatives are therapeutically valuable in view of their anti-inflammatory, vasodilator and blood-platelet aggregating inhibitor properties.                             - I -
Patent CA-1085346-A (CA)
Title: Procede de jonction de barres metalliques avec des blocs de carbone
Inventor: DUMAS DANIEL
IPC: C25B9/04
Filed: 1976-07-13
Granted: 1980-09-09
Abstract: Procédé de jonction de barres d'amenée de courant en acier avec des blocs de carbone comportant des rainures ou des trous destinés à les recevoir afin de constituer des éléments de cathodes de cellule d'électrolyse de l'aluminium, dans lequel on solidarise barres et blocs par de la fonte apportée à l'état liquide.  Chacune des rainures ou chacun des trous dans lesquels seront placées les barres, comporte un ou plusieurs points d'ancrage situés uniquement au voisinage de l'extrémité des blocs, ce ou ces points étant constitués par des dépressions ou des reliefs qui seront épousés par la fonte, au moment de la coulée de celle-ci dans l'intervalle entre les barres et les parois des rainures ou des trous.  La longueur de chaque barre est ajustée de façon à ce qu'elle comporte une extrémité située au voisinage du milieu du bloc et le plus souvent en decà, cette extrémité pouvant se dilater librement dans le sens longitudinal à l'intérieur de la rainure ou du trou, sous l'influence de la chaleur, grâce à un espace réservé de dimensions suffisantes.
Patent CA-1070807-A (CA)
Inventor: LEBAILLY JACQUES
IPC: H04B10/43
Filed: 1976-07-21
Granted: 1980-01-29
Abstract: ABSTRACT:      Electroluminescent or photodetector optoelectronic semiconductor device having a P-N junction and a transparent surface region, for a narrow wavelength range and very low voltage.  The surface region is localised in a layer of the same material which is less doped, the depth of the junction is determined as a function of the diffusion length of the minority carriers and these latter are determined as a func-tion of the absorption length.  In photodetection the deple-tion zone is limited.  Application to transmission by photo-coupling in the two directions.  Symmetrical reversible photocouplers.
Patent CA-1085507-A (CA)
Inventor: HUFFINE COY L
IPC: B30B11/20
Filed: 1976-09-21
Granted: 1980-09-09
Abstract: ANTI-STATIC MAGNETIC RECORD DISK ASSEMBLY         Abstract of the Disclosure A rotary magnetic record disk assembly comprising a magnetic disk which is rotatably disposed within a containing jacket of material of high electrically insulating characteristics.  An electrically conductive layer is disposed on the inside surface of the jacket for draining away electrostatic charge on the jacket.
Patent CA-1066418-A (CA)
Title: Alphabetic character work upper/lower case print convention apparatus and method
Inventor: HILLIARD JOHN J
IPC: G06F17/21
Filed: 1976-12-23
Granted: 1979-11-13
Abstract: ALPHABETIC CHARACTER WORD UPPER/LOWER CASE PRINT CONVENTION APPARATUS AND METHOD                  ABSTRACT The apparatus and method disclosed herein determines whether an alphabetic character field output from an optical character reader (OCR) is related to the OCR scan of an upper case or a lower case inscription on the document scanned.  Each word output by the OCR corresponds to a field (i.e., word) of characters on the scanned docu-ment.  The signals representative of the upper and lower case alpha-betic characters and rejects including conflicts outputted from the OCR are applied to a character occurrence probability storage apparatus having precomputed empirical probabilities therein that: a given character recognition is the result of the scan of an upper or lower case character as the case may be.  The storage apparatus includes probability values for character conflicts and rejects.  As the series of signals from the OCR output are applied to the character occurrence probability storage apparatus, a running sum of the respective pro-babilities for the upper case and lower case print conventions is developed so that, following the input of the final character, reject or conflict within a word to the aforesaid apparatus, an appropriate upper or lower case determination can be made for all of the char-acters within the word.  This determination corresponds with the print convention of the word inscribed on the scanned document.  A correspond-ing upper or lower case flag is correspondingly generated with the print convention determination for further text processing.
Patent CA-1078011-A (CA)
Inventor: HAKARINE DUANE D
IPC: H01M2/12
Filed: 1977-01-07
Granted: 1980-05-20
Abstract: ABSTRACT OF THE DISCLOSURE                An explosion-proof vent barrel having a tubular body, an electrolyte splash baffle and an electrolyte drain funnel molded integrally with one another, there being a porous flame-arresting disc telescoped into the body.  Three barrels are ganged on a common frame which protects the flame-arresting discs against dirt and grease.   In one embodiment, the underside surface of the frame is formed with a shallow channel to permit positive venting of the gases which diffuse through the arrestor discs.  In another embodiment, both the discs and barrels are maintained in closely spaced relation to the underside of the frame for defining a positive escape area about substantially the entire periphery of the disc.  In each instance, the depth of the positive vent escape area does not exceed .015 inches as to permit positive venting while retarding the entrance of a flame into the space between the disc and frame.
Patent CA-1062319-A (CA)
Inventor: MARSH RONALD W
IPC: A47B5/04
Filed: 1977-02-23
Granted: 1979-09-11
Abstract: Abstract of the Disclosure A wall mounted folding table movable from a collapsed and recessed position includes a folding bracket arrangement having first and second arms pivotally interconnected and pivotally connected to the table top and to the wall structure.  The foldable bracket includes a reciprocating latch which releasably connects the folding bracket members in a linear support position and also maintains the folding leg in a collapsed and recessed position.
Patent CA-1114385-A (CA)
Inventor: FUJITA TADASHI
IPC: C07D233/54
Filed: 1977-03-15
Granted: 1981-12-15
Abstract: ABSTRACT OF THE DISCLOSURE This invention relates to novel N-(mercaptoacyl)-histidines repre-sented by the formula                           (I) wherein n is 1 or 2, which have antiarteriosclerosis activity, and to a pro-cess for the manufacture thereof.
Patent CA-1082442-A (CA)
Title: Stabilized vinyl halide resin compositions
Inventor: SZABO EMERY
IPC: C08L1/00
Filed: 1977-03-21
Granted: 1980-07-29
Abstract: Abstract of the Disclosure Vinyl halide resin compositions that are characterized by excellent early color, clarity, color retention, and processability contain a stabilizer system that comprises a mono-organotin tris(alkyl mercaptide), a mercaptoalcohol, and an organotin sulfide.
Patent CA-1078355-A (CA)
Inventor: MASCLET JEAN
IPC: B64C25/00
Filed: 1977-03-24
Granted: 1980-05-27
Abstract: ABSTRACT OF THE DISCLOSURE          An undercarriage for an aircraft has a safety device which fails under a predetermined breaking load to separate a leg member of the under-carriage from a rigid element of the undercarriage, the rigid element remaining on the aircraft.  The aircraft has on the frame thereof a front mounting and a rear mounting for mounting the undercarriage and said undercarriage comprises said leg member and said rigid element which is mounted in and extends between said front and rear mountings and forms an axle about the axis of which the leg member of the undercarriage can be pivoted for raising and lowering the undercarriage. Said axle is normally held rigid with said leg member by a front frangible element which fractures under determined stress and a rear frangible element which fractures, under substantially wholly flexion stress, following fracture of the front frangible element, whereby said leg member can separate from the aircraft without coming into contact with elements of the frame of the aircraft when said determined stress is exceeded.
Patent CA-1081743-A (CA)
Inventor: MEYER JEFFRY R
IPC: H01H33/12
Filed: 1977-04-20
Granted: 1980-07-15
Abstract: MODULAR PUFFER-TYPE CIRCUIT-INTERRUPTER UNIT ADAPTABLE FOR DIFFERENT VOLTAGE AND              CURRENT RATINGS            ABSTRACT OF THE DISCLOSURE         An improved modular, puffer-type circuit-inter-rupting unit is provided capable of its own independent support, and adaptable for use, either as a singular modular unit, or when used with a plurality of similar units, con-stituting a conjointly-acting group of serially-related puffer-units suitable for the higher-voltage applications.         The modular puffer-unit of the instant invention is capable of independent-support, and is adaptable for very simple straight-line actuating movement, for not only caus-ing contact separation, but also a simultaneous compression of the utilized gas to a pressurized state for gas ejection into the established arc for rapid arc extinction thereof.          A novel feature of the instant invention is the utilization of a side insulating support baffle plate, which not only provides the desirable independent support for the sta-tionary contact structure of the modular puffer-unit, but, additionally, serves as a baffle plate to prevent the later-al dispersion of the emanated hot arc gases from reaching the side tank wall, and thereby causing voltage flash-over.
Patent CA-1081931-A (CA)
Inventor: PLATE DIETER E A
IPC: D01H13/16
Filed: 1977-05-05
Granted: 1980-07-22
Abstract: A B S T R A C T     Apparatus and processes for breaking out a residual strand where one strand breaks in a strand combining operation.          The invention makes use of the change in the line of travel of the residual strand to effect break out in the new line of travel.
Patent CA-1112424-A (CA)
Inventor: FULLER WILLARD A
IPC: C01B7/03
Filed: 1977-05-13
Granted: 1981-11-17
Abstract: PRODUCTION OF CHLORINE DIOXIDE                          Abstract In a process for continuously generating a mixture containing chlorine dioxide, chlorine and sulfate wherein (a) an alkali metal chlorate, a chloride and a mineral acid selected from sulfuric acid and mixtures of sulfuric acid with phosphoric and hydrochloric acid are continuously reacted in proportion to generate chlorine dioxide and chlorine;     (b) the temperature is maintained within a range of from about 50 to about 100 degrees centigrade;     (c) the acidity of the reaction solution is maintained within the range of about 2 to about 12 normal;     (d) chlorine dioxide and chlorine produced by said reaction is withdrawn from the reactor;     (e) water is removed and alkali metal salt of said mineral acid is crystallized in the form of an aqueous slurry containing minor amounts of chlorate, chloride and acid values;     The improvement which comprises: continuously passing the slurry containing crystals of the alkali metal salt of the mineral acid and chlorate values into the top of a metathesis column, in a downward flow;     countercurrently passing a stream of aqueous metathesis solution upward through said column at a rate and in amounts sufficient to effect reaction of said solution with said alkali metal salt converting said alkali metal salt to the salts of the metathesis solution whereby chlorate, chloride and acid values recovered therefrom are continuously and substantially returned to the reaction of (a) aforesaid.
Patent CA-1095491-A (CA)
Inventor: KRABETZ RICHARD
IPC: B01J23/28
Filed: 1977-05-25
Granted: 1981-02-10
Abstract: O.Z. 32,051 ABSTRACT OF THE DISCLOSURE          Catalysts which consist of a molded carrier, the surface of which is coated with an active catalyst composition of the general formula Mo12AaBbCcDdOx, where A is V and/or W, B is Cu and/or Fe and/or Mn and/or Ni and/or Cr, C is Nb and/or Ta and/or Bi and/or Sb and/or Sn and/or Th and/or Ce and/or U, D is Li and/or Na and/ or K and/or Rb and/or Cs and/or T1 and a is from 0.1 to 18, b is from O to 8, c is from O to 10, d is from O to 2 and x is from 36 to 135, which are particularly active and selective for the oxi-dation of acrolein and methacrolein with oxygen-containing gases to give acrylic acid and methacrylic acid, respectively, are obtained by first manufacturing the catalyst composition, before applying it to the carrier, from thermally easily decomposed salts of the components by mixing aqueous solutions, slurries or moist solid masses of the salts of the components, drying the mixture and calcining the dried composition at from 140 to 600°C, then milling it to a particle size of less than 150/um and thereafter applying it, as a mixture with water, as a layer from 10 to 1,500 um thick, to the premolded carrier, which has a rough surface.
Patent CA-1090057-A (CA)
Inventor: GOFFINET PIERRE C E
IPC: D06M13/463
Filed: 1977-06-03
Granted: 1980-11-25
Abstract: TEXTILE TREATMENT COMPOSITIONS               Pierre Charles Emile GOFFINET           Jean-Pierre Charles Ignace Marie LECLERCQ      ABSTRACT OF THE DISCLOSURE     A textile treatment composition comprises certain polyamine salts and nonionic fabric conditioning substances which arc fatty acid esters of alcohols or anhydrides having up to 8 carbon atoms.  Particularly useful polyamine salts have a higher alkyl substituent and have ethoxylate or polyethoxylate substituents on the nitrogen atoms.  Glycerol stearates and sorbitan stearates are preferred nonionic agents.  The highly charged cationic species provide an excellent carrier system to encourage deposition of the nonionic fabric conditioner on fabrics which are rinsed in dilute aqueous solutions of the composition.
Patent CA-1090706-A (CA)
Inventor: BARTH JORDAN B
IPC: A61K8/19
Filed: 1977-06-09
Granted: 1980-12-02
Abstract: ABSTRACT OF THE DISCLOSURE          There is disclosed a stable mouthwash product having a pH of about 8.0 to about 9.3 and comprising approximately by weight 3 to 9% of sodium bicarbonate, 0.005 to 0.002% of a dye selected from the group consisting of F.D. & C. Blue #1, Red #4, Green #3, Red #40, Yellow #5, D. & C. Red #3, Red #19 and Red #33, 5 to 15% of ethanol or isopropanol, 0.05 to 0.4% of a herbal, medicinal or mint flavor oil, 0.01 to 4.0% of at least one member of the group consisting of nonionic and anionic emulsifiers for the flavor oil, and the balance deionized water, said product being prepared by solubilizing the sodium bicarbon-ate in deionized water, mixing the resulting solution with a solution of the remaining components in the ethanol or iso-propanol, and filtering the sodium bicarbonate solution through a 0.1-1.0 micron filter at least about 12 hours after the forma-tion thereof whereby said product has a bacterial concentration of less than 10 counts/mol.  The product is especially suitable as a mouthwash and rinse.