baber/WOPTO huggingface dataset:
Patent CA-2048072-C (CA)
Title: Electric initiator for blasting caps
Inventor: WALKER RICHARD E
IPC: F42B3/13
Filed: 1991-07-29
Granted: 1995-04-04
Abstract: In an electric detonator or blasting cap of the type including  a  base  charge  of  high  explosive  material,  an initiator means or initiator for creating an abrupt eruption in response to application of a selected voltage across the igniter  and  means  for  detonating  the  base  charge  upon creation of the abrupt eruption of the initiator, there is provided an improvement comprising forming the initiator as a junction of energetic material, such as a PN junction of an LED chip, encapsulated in a plastic or glass confinement housing. The housing has a directional controlling partition means facing in a selected direction.  This partition has an effective spacing from the junction substantially less than the remainder of the confinement housing whereby application of  a voltage  pulse of  over about  500  volts  causes  the junction to form an electric arc to create a plasma by a confined,   high  temperature,   high  pressure   exothermic reaction.   The  effective  spacing  of  the  aforementioned partition at the junction is thick enough to confine the exothermic reaction until creation of the plastic and thin enough  to  allow  the  plasma  to  rupture  the controlled partition  and  penetrate  through  the  partition  a  given distance in the selected direction.   The base charge  is located  in  the  selected  direction  and  spaced  from  the partition a distance less than the given distance of plasma penetration whereby the plasma  impacts  against  the  base charge, thus, detonating the base charge.
Patent CA-2050138-C (CA)
Title: Tape cassette
Inventor: SUZUKI KAZUYOSHI
IPC: G11B15/07
Filed: 1991-08-28
Granted: 2001-10-30
Abstract: A tape cassette for use in a tape player includes a cassette case having a main portion with an external size which is substantially the same as that of the case of a different type of tape cassette and an additional portion which extends from one side of the main portion and has a thickness slightly smaller than that of the main portion. An information indicating portion is provided at a lower surface of the additional portion for indicating respective information by whether or not a hole is present at a predetermined position. An information reading member provided in the tape player for determining whether or not a hole is present at each respective predetermined position in the information indicating portion can be located at a position so as not to interfere with the cassette case of the different type of tape cassette. As a result, the information reading member will not hinder the loading operation of the different type of tape cassette into the tape player and the information reading member will not malfunction due to the loading of the different type of tape cassette.
Patent CA-2059603-C (CA)
Title: Stable and homogeneous aqueous formulations of surfactants
Inventor: MARTINI THOMAS
IPC: C09K23/24
Filed: 1992-01-17
Granted: 2002-10-29
Abstract: Stable and homogeneous aqueous formulations of surfactants stable and homogeneous aqueous formulations of surfact-ants having an HLB value of less than or equal to 13, which additionally contain a compound of the formula I    in which R1 is C1-C8-alkyl, C1-C8-alkenyl, phenyl, alkyl-phenyl or phenalkyl having in each case 1 to 4 carbon atoms in the alkyl chain or cyclohexyl, R2 is hydrogen or one of the radicals mentioned for R1, or R1 and R2, together with the nitrogen atom, are a heterocyclic radical, M is an alkali metal cation, an ammonium cation or one equivalent of an alkaline earth metal or aluminium cation and m and n in each case independently of one another are numbers from 6 to 8.    By the presence of the compounds of the formula I, it is possible to prepare stable and homogeneous aqueous formulations even from those surfactants which are otherwise only sparingly soluble or not soluble at all in water.
Patent CA-2061384-C (CA)
Title: Electro-optical device
Inventor: HAYASHI MASATAKE
IPC: G09G3/28
Filed: 1992-02-18
Granted: 2003-12-23
Abstract: Plasma Addressed Liquid Crystal display devices in which liquid crystal cells serve as a display element and plasma discharge regions far driving them are adjacently arranged, a space ranging over all the scanning units is provided.  Such a space has no partitions in the discharge regions.        These discharge regions are formed as a continuous space over the entire screen, or every plural scanning units. On the base plate, discharge electrode pairs for generating discharge plasma are provided. Thus, discharge plasma generated in the vicinity of each discharge electrode pair serves as a scanning unit. The liquid crystal cell functions as a sampling capacitor, and the discharge plasma functions as a sampling capacitor. By scanning discharge plasma, an image display is carried out.
Patent CA-2065947-C (CA)
Title: Detergent composition containing a polyimide biopolymer hydrolyzable in a washing medium
Inventor: PONCE ARNAUD
IPC: C08G73/10
Filed: 1992-04-14
Granted: 2000-02-01
Abstract: Detergent composition containing a polyimide biopolymer which has a COO<-> charge density which can range from 0 to 5 x 10<-4> mol/g of polymer and is capable of acquiring, in the washing bath, a COO<-> charge density at least equal to 10<-3> mol/g of polymer.
Patent CA-2069384-C (CA)
Title: A process for the preparation of liquid storable organic isocyanates containing carbodimide and/or uretone imine groups and their use for the preparation of polyurethane plastics
Inventor: SCHOLL HANS JOACHIM
IPC: C07C267/00
Filed: 1992-05-25
Granted: 2003-07-22
Abstract: The present invention relates to liquid storable organic isocyanates containing carbodiimide and/or uretone imine groups prepared by (a) partially carbodiimidizing isocyanate groups of an organic isocyanate with catalysts of the phospholine type, and (b) terminating the carbodiimidization reaction by the addition of a silylated acid corresponding to the formula X-[Si(CH3)3]n in which X represents the neutral acid residue obtained by removal of the acidic hydrogen atoms from an n-basic acid having a pK a value of at most 3, other than a hydrohalic acid, and n is an integer of 1 to 3.      The invention further relates to the use of the liquid polyisocyanate mixtures according to the invention for the preparation of polyurethane plastics, preferably polyurethane foams, having improved burning behavior.
Patent CA-2074720-C (CA)
Title: Immune reactivity to expressed activated oncogenes for diagnosis and treatment of malignancy
Inventor: CHEEVER MARTIN A
IPC: A61K35/17
Filed: 1991-01-24
Granted: 2002-07-23
Abstract: Methods for the detection, monitoring and treatment of malignancies are disclosed. Detection of the proliferation of T cells in response to in vitro exposure to a protein expression product of an acivated oncogene or cancer-related gene associated with a malignancy, or detection of immunocomplexes formed between the protein expression product and antibodies in body fluid, allows the diagnosis of the presence of a malignancy. The present invention also discloses methods and compositions for treating a malignancy.
Patent CA-2075800-C (CA)
Inventor: KUEHL HANS
IPC: B21C47/32
Filed: 1991-02-05
Granted: 2000-11-28
Abstract: Apparatus for producing coils of spring steel material, characterised by a material unwinding station, an intermittently operating cutting station, a winding spindle driven by a motor, which spindle on its peripheral surface comprises a material gripping device and by a conveyor arm reciprocating in a linear manner between the cutting station and the winding spindle, which conveyor arm is provided with a material gripping device.
Patent CA-2075914-C (CA)
Title: Addressable relay module for circuit breakers
Inventor: HAUN ANDY ALLEN
IPC: H02J13/00
Filed: 1991-12-17
Granted: 2001-01-09
Abstract: An addressable relay module (10) is provided for controlling a plurality of relay outputs (14) associated with an electronic circuit breaker system using a trip unit for monitoring system functions or network parameters. The relay module (10) is linked to a multi-drop serial communications network (18) through which data pertaining to system functions is relayed to and from a communications microcontroller (12) which controls the operational status of relay contacts (14) linked thereto. The microcontroller (12) addresses specific ones of associated relay outputs (14) in accordance with address information contained within the network data. The addressable relay module (10) effectively maps the plurality of relay contact outputs (14) linked thereto to a corresponding plurality of network device parameters ( 18) received through the multi drop network (20).
Patent CA-2078971-C (CA)
Title: Apparatus for adjustably mounting a camera on aircraft
Inventor: MAEDA IWAO
IPC: B64D47/08
Filed: 1992-09-23
Granted: 2001-12-04
Abstract: A mechanism for mounting a camera on an aircraft, such as a helicopter, comprising a camera housing for holding a camera and a camera support section including a linkage system for mounting the camera housing to the underside of the aircraft in a manner permitting movement between a retracted position proximate the aircraft fuselage and an extended position below the plane of the landing skids to facilitate 360° photography. The mechanism includes a motor driven actuator for positioning the support section between limit positions and a manual back-up system in the event that the motor driven system becomes inoperable.
Patent CA-2080696-C (CA)
Inventor: WESCH JOHANN G
IPC: B05B1/16
Filed: 1991-04-15
Granted: 1998-08-18
Abstract: Dans le but de réduire la rotation non souhaitée du corps d'un pulvérisateur autour de son propre axe longitudinal dans un pulvérisateur à rotor pour un dispositif de nettoyage à haute pression comprenant une enveloppe qui a dans une paroi frontale un évidement en forme de pot avec une ouverture centrale, un corps de pulvérisateur percé d'un trou, le corps du pulvérisateur étant appuyé à un bout sphérique dans l'évidement en forme de pot, s'étendant dans le sens longitudinal sur une partie de l'enveloppe et ayant un diamètre extérieur plus petit que le diamètre intérieur de l'enveloppe, et une entrée pour un liquide débouchant tangentiellement dans l'enveloppe et faisant tourner le liquide autour de l'axe longitudinal dans l'enveloppe, de sorte que le corps du pulvérisateur tourne avec le liquide et, ce faisant, s'appuie par une surface d'appui à sa circonférence sur la paroi intérieure de l'enveloppe, l'axe longitudinal du corps du pulvérisateur se trouvant incliné par rapport à l'axe longitudinal de l'enveloppe, il est proposé que la surface d'appui du corps du pulvérisateur soit faite d'un matériau ayant un coefficient de frottement en relation avec le matériau de la paroi intérieure de l'enveloppe qui soit > 0,25.
Patent CA-2081703-C (CA)
Title: Thrombin and method of producing the same
Inventor: EIBL JOHANN
IPC: A61K35/00
Filed: 1992-10-29
Granted: 1999-01-19
Abstract: A thrombin of human or animal origin is free of infectious agents and can be produced by activation of prothrombin subjected to a heat treatment for the inactivation of infectious agents.
Patent CA-2082248-C (CA)
Title: Journal bearing with bearing-shaft clearance zone
Inventor: KALLENBERGER HARVEY
IPC: F16C17/02
Filed: 1992-11-05
Granted: 1995-02-07
Abstract: Abstract of the Disclosure The invention is an improvement in a mechanical drive train having a bushing-type plain journal bearing, a housing radially supporting the bearing to a reference plane, and a shaft extending through the bearing beyond the reference plane.  That portion of the bearing between the reference plane and a bearing end is unsupported by the housing and therefore subject to fatigue breakage as the shaft repeatedly deflects or tips. The improvement comprises a contoured surface formed on an end of the bearing to define a clearance zone.  When the shaft deflects or tips under load or for other reasons, the shaft is prevented from contacting the bearing along the zone. Fatigue breaking of the bearing is thereby substantially reduced.  The invention also helps reduce localized heating and wear and formation of wear particles which may result in secondary damage.  All of the foregoing would contribute to reduced bearing life.
Patent CA-2085117-C (CA)
Title: Power amplifier
Inventor: BLACK GREGORY R
IPC: H03G3/20
Filed: 1992-04-08
Granted: 1997-05-13
Abstract: An amplifier which contains two amplifier stages. Each amplifier stage (433,435) utilizes a diode (407) to attenuate the RF input signal (401) and to stabilize the bias current over temperature.  The two amplifier stages (433, 435) are cascaded together.  The control voltage inputs are serially coupled through a transistor (423). The transistor (423) shifts the voltage of the control signal (425) down, thereby, shifting the control characteristics and AM characteristics of the first amplifier stage (435) relative to the second amplifier stage (433).
Patent CA-2087223-C (CA)
Inventor: HOGUCHI TETSUYA
IPC: F16D23/02
Filed: 1993-01-13
Granted: 1996-01-02
Abstract: The present invention provides a novel gear product including plural gear members of different tooth profiles and configurations, which are manufactured integrally through forging process.  The forged gear product of the invention is compact and light in weight while having a sufficient strength.  The gear product includes a clutch spline member with clutch spline teeth and a helical gear member with spiral teeth, which are integrally forged and continuously arranged in the axial direction to be adjacent to each other without any clearance therebetween.
Patent CA-2091033-C (CA)
Title: Method of sulfur purification
Inventor: NAGATA HIDEKI
IPC: C01B17/02
Filed: 1993-03-04
Granted: 2003-01-28
Abstract: Metal impurities such as mercury, copper, lead, zinc, iron and cadmium that are contained in trace amounts in sulfur that has been recovered from zinc concentrates by direct pressure leaching or other hydrometallurgical processes can be removed effectively by bringing the molten sulfur, as it is held at a temperature not lower than the melting point of sulfur, into contact with activated alumina by passage through a packed layer of activated alumina or a filter coated with activated alumina, or by mixing with activated alumina under stirring or by passage through a fluidized layer of activated alumina. The method is capable of reducing the sum of metal impurities in the sulfur to 50 ppm or below, with the mercury content being 1 ppm or less, whereby sulfur having a purity of at least 99.99% that is advantageous for use as a raw material in the production of sulfuric acid and in other industries is manufactured at low cost on simple equipment.
Patent CA-2094339-C (CA)
Title: Level measurement using autocorrelation
Inventor: COURNANE THOMAS C
IPC: G01S13/32
Filed: 1993-04-19
Granted: 1996-10-29
Abstract: First and second identical pseudo-random binary sequences are generated.  The second sequence is delayed in a variable delay arrangement, and a reflected first sequence is compared with a delayed second sequence.   The second sequence is delayed until the reflected sequence and the delayed  sequence  are  coincident.     The  delay  of  the adjustable delay is equal to the travel time of the first sequence.
Patent CA-2095018-C (CA)
Title: Resolution transforming raster-based imaging system
Inventor: FRAZIER ALLEN L
IPC: B41J2/52
Filed: 1991-11-06
Granted: 1999-04-20
Abstract: A conventional display device, such as a marking engine for a laser printer or digital copier, having a nominal resolution (where the energy source for the display device can be selectively activated) and a predetermined threshold level for producing output image dots,  (see Fig. 5), is modified to a different (higher or lower) resolution or modified to produce output dots along axes (7, 9 and 11 in Fig. 10) different from the axes (3,5) of the display device (such as for producing halftone screens on angles), by using different resolution input data, and by selectively activating the energy source to produce overlap areas (see Fig. 10) that exceed the device threshold and thereby produce dots (17) at positions that are not on the normal resolution positions of the device (lines 3 and 5).  Such threshold exceeding overlap areas may be achieved by activating the marking engine's energy source at a plurality of positions, with the energy at some positions being selectively below the threshold level for producing an output dot, but with the combined energy at the desired dot positions being above the threshold level to produce the desired dot (see Figs 6, 7 and 8).
Patent CA-2098318-C (CA)
Inventor: TEERI NIILO HEIKKI
IPC: B60C11/16
Filed: 1991-12-12
Granted: 2003-02-18
Abstract: The invention relates to an anti-skid stud the operation of which is based on a larger than conventional diameter of the tip part (1) of the anti-skid stud and on its primarily annular contact with the road surface during normal driving, with a slight pro-jection of the tip and with a small surface pressure, the projection increasing in situations in which it is needed, for example dur-ing braking, the external force P caused by the braking tilting the anti-skid stud in its position, whereupon the projected edge (5) of the tip part will penetrate over its entire width into the road surface.
Patent CA-2110930-C (CA)
Inventor: ROBA GIACOMO STEFANO
IPC: H01S3/08
Filed: 1993-12-08
Granted: 1999-07-20
Abstract: In accordance with the present invention, an optical amplifier is provided having an erbium doped fibre, without erbium confinement, having a NA higher than 0.2 in which the background loss of the fibre at the pump wavelength is at a level which does not significantly reduce the optimum gain efficiency of the amplifier from its theoretical value.  Briefly, this is achieved by having the difference in the coefficients of thermal expansion of the core and cladding adjacent the core/cladding interface at a value which is less than a predetermined value which corresponds to a ratio of erbium loss to background greater than a predetermined ratio.
Patent CA-2117896-C (CA)
Inventor: JOHNSON DUANE RICHARD
IPC: B60T15/18
Filed: 1992-07-31
Granted: 2003-06-03
Abstract: A relay valve (10) for a fluid pressure braking system includes a relay piston (16) and a load piston (34) which is responsive to the pres-sure at the inlet port (38) of the relay valve to ex-ert a biasing force on the relay piston loading the latter against the inlet/exhaust valve (56). The bi-asing force is opposed by fluid pressure at the in-let port acting across the effective area of the in-let/exhaust valve. The biasing force is greater than the spring force holding the inlet/exhaust valve closed, so that the valve responds immedi-ately to pressure signals transmitted through the control port of the relay valve.
Patent CA-2121546-C (CA)
Inventor: DOPPSTADT WERNER
IPC: B02C13/09
Filed: 1994-04-18
Granted: 1999-11-09
Abstract: The comminuting machine includes a housing provided with a rotary impact mechanism. A conveyor conveys infed material to the rotary impact mechanism which cooperates with an impact plate in disintegrating the infed material. A comminuting cover plate covering a discharge opening of the comminuting machine follows the impact plate in the rotational direction and is arranged laterally of the rotary impact mechanism. The comminuting cover plate has an arcuate shape and is provided with parallel teeth rows protruding opposite to the rotational direction and transversely offset from each other. A comminuting grate is arranged below the rotary impact mechanism and forms an arcuate plate with throughpass openings. The comminuting grate cooperates with the rotary impact mechanism in forcing the infed material through the throughpass openings with further comminution. Adjusting devices are associated with the comminuting cover plate and the comminuting grate for adjusting the same relative to the rotary impact mechanism.
Patent CA-2124123-C (CA)
Title: User-level backup file system
Inventor: FOWLER GLENN STEPHEN
IPC: G06F9/46
Filed: 1994-05-24
Granted: 1999-05-18
Abstract: A backup file system which can be used without modification of application programs, the operating system, or the hardware. The backup file system is implemented by means of a dynamically-linkable replacement library and user-level processes on a primary computer system and a backup computer system. The dynamically-linkable replacement library has the same interfaces as a standard dynamically-linkable library of file operations. The functions in the replacement library perform the same file operations as their counterparts in the standard library; in addition they send messages specifying the just-performed operation to a user-level process on the backup computer system. The user-level process executes the operation specified in the message on a backup file in the backup computer system. The files to be backed up are specified by identifying subtrees in the namespace of the primary file system; the subtrees make up a user-defined namespace. The backup file system is made fault tolerant by the use of monitor processes which monitor the backup computer system and the processes of the backup file system and deal withfailures as required to keep the backup file system operating.
Patent CA-2124240-C (CA)
Inventor: HOLLENBERG DAVID HENRY
IPC: D21H27/30
Filed: 1994-05-25
Granted: 2004-08-31
Abstract: A multi-ply tissue contains an internal indicia, such as a printed pattern applied to the center ply, which is visible through the outer plies of the tissue and which indicates the presence of some unique ingredients within the tissue product.
Patent CA-2124700-C (CA)
Inventor: WANG YIMING
IPC: B31C3/00
Filed: 1994-05-31
Granted: 1998-11-03
Abstract: The invention provides multi-grade spirally wound paperboard tubes of enhanced flat crush strength construction.  The multi-grade spirally wound paperboard tubes of the invention include a plurality of structural paperboard plies having at least two predetermined densities including a lower density and a higher density wherein the higher density is at least about 3% greater than the lower density.  The cylindrical bodywall is defined in radial cross section by at least one centrally located paperboard layer disposed between at least one radially inwardly located structural paperboard layer and at least one radially outwardly located structural paperboard layer.  The centrally located paperboard layer is formed from the higher density paperboard and the inwardly and outwardly located structural paperboard layers are formed from lower density paperboard.
Patent CA-2130269-C (CA)
Title: Psk demodulator
Inventor: GOLDENBERG YOAV
IPC: H04L7/00
Filed: 1993-12-29
Granted: 1999-11-16
Abstract: A demodulator responsive to a symbol containing analog signal includes a pair of relatively inexpensive analog-to-digital converters for sampling I and Q channels of the signal only once per symbol. A derotator responsive to outputs of the converters and a digital signal representing frequency and phase corrections for an input to the demodulator operates in accordance with a CCRDIC function to derive I and Q channel digital signals that are compensated by the corrections. A  digital phase shifter responsive to at least one of the digital I and Q signals controls when the input is sampled by the converter.