baber/WOPTO huggingface dataset:
Patent EP-0421299-A2 (EP)
Inventor: NIELSEN PAUL LIVINGSTONE EASTM
IPC: G03G15/16
Filed: 1990-09-28
Abstract: Electrically biasable transfer members for use in electrostatographic transfer processes for transferring toner images from one support surface to another and to methods for their preparation are described. The electrically conductive biasable transfer members comprise a conductive substrate capable of supporting a uniform bias potential thereon and at least one coating comprising a resilient crosslinked elastomeric polyurethane formed by reacting (a) a polyisocyanate prepolymer comprising the reaction product of an aliphatic polyisocyanate and a polyether polyol selected from the group consisting of a polyalkylene glycol having 2 to 3 carbon atoms in the alkylene group, and (b) a hardening mixture comprising a polyether polyol of (a) and, as a conductivity control agent, from .01 to 3.0 weight percent based on the total weight of (b) of a complex of an oligoethylene glycol selected from the group consisting of di-, tri- and tetraethylene glycol with an ionizable alkali metal salt selected from the group consisting of sodium iodide, lithium iodide and sodium thiocyanate. 
     The resistivity of the elastomeric resilient polyurethane coating on the biasable member is controlled or adjusted to within a desired level of resistivity due to the inclusion of the conductivity control agent in the crosslinked polyurethane elastomer. Additionally, the inclusion of the conductivity control agent in the crosslinked polyurethane elastomer reduces the sensitivity of the resistivity of the polyurethane coating on the biasable member to changes in relative humidity.   Further, since the conductivity control agent is copolymerized with the polyisocyanate prepolymers and polyols used to make the elastomeric polyurethane coatings of the biasable members of the invention, the conductivity control agent is bonded covalently to the backbone and/or the crosslinking portion of the polyurethane elastomer where it forms a permanently fixed part of the crosslinked polymer and will not migrate therefrom resulting in a continuous change in the resistivity of the polyurethane coating over time and possible adverse affects on materials that may come into contact with the migrating agent. The utility of such biasable members is in the transfer of toner images from a photoconductor to a final support sheet where the member, for example, a bias transfer roll, electrically cooperates with a photoconductor to establish a directional force field therebetween.
Patent EP-0427965-A2 (EP)
Inventor: WEINSTEIN ROBERT M
IPC: C07B61/00
Filed: 1990-10-15
Abstract: 4-tert-Butylcyclohexanol is obtained by a process which consists of the hydrogenation of 4-tert-butylphenol or of 4-tert-butylcyclo- hexanone in the presence of a catalyst system consisting of rhodium on a support of Al2O3, SiO2, TiO2, SiO2.Al2O3 or charcoal, in combination with HBF4 or BF3.[Y]n, Y denoting the group R2O, R being a C1-C6 lower alkyl group, or the group CH3CO2H, H3PO4 or H2O and the exponent n having the value of zero, 1 or 2. 
<??>The abovementioned catalyst system has the advantage of being easily recyclable and of having a long lifetime while allowing a high degree of selectivity to be obtained.
Patent EP-0436802-A2 (EP)
Title: Capped polyphenylenether
Inventor: KOWALCZIK UDO DR
IPC: C08L25/04
Filed: 1990-11-14
Abstract: 2.1 The object was to increase the oxidative and thermal stability of polyphenylene ethers by capping with easily handled substances which are neither aggressive nor corrosive. 2.2 The object has been achieved by reacting 100 parts by weight of polyphenylene ether with from 0.5 to 10 parts by weight of certain saturated imides which are fully substituted on the nitrogen, at temperatures of from 230 to 330 DEG C. 2.3 The moulding compositions based on these capped polyphenylene ethers are used for the production of mouldings.
Patent EP-0437872-A2 (EP)
Inventor: ZANKER KLAUS
IPC: G01F1/00
Filed: 1990-11-20
Abstract: Improved methods and systems are provided for determining a volumetric flow rate of mud in a return line without the aid of a velocity probe. A mud level sensor is located in a return line chimney preferably in close proximity to the bell nipple. The sensor senses the height of the mud flowing in the return line. Where an ultraonsic transceiver is used as the sensor, temperature sensors in the chimney and return line determine a temperature gradient in the return line which provides a speed of sound correction as does a target at a known distance from the transceiver. A computer receives the uncorrected mud height and the speed of sound information, and determines the flow-out volume of the mud. Flow-out volume is related to the mud height, the geometry of the return line, and mud parameters. In a more complete system, the computer calibrates the determined flow-out volume with the flow-in volume, and provides a correction factor which is used to provide a corrected flow-out determination. The computer also monitors delta flow (flow-out minus flow-in), and based on the rate of change of delta flow determines when an undesirable condition such as a kick or fluid loss occurs. Where the system is to be used on rig which is subject to movement (e.g. a floating rig), an angle sensor is employed to help determine instantaneous flow-out, and the flow-out determinations are averaged over the movement cycle of the rig as determined by heave position sensors available on the rig.
Patent EP-0381309-A2 (EP)
Inventor: COOK ALAN JAMES
IPC: G01D5/26
Filed: 1990-01-04
Abstract: A resonant beam sensor (1, 10, 34) is excited into resonance by directing onto it a drive signal comprising light which has been amplitude modulated at the resonant frequency. A portion of the drive signal reflected by the sensor (1, 10, 34) is demodulated by a photodetector (15, 32) to provide a measurement signal.
Patent EP-0382342-A2 (EP)
Inventor: ARIMILLI RAVI KUMAR
IPC: G06F13/28
Filed: 1990-01-11
Abstract: A DMA controller is described, which is coupled to two separate buses and controls the transfer of data between them. To effect a block data transfer, data is simultaneously read on one bus and written on the other. This allows data to be transferred between buses at the maximum transfer rate supported by the slower of the two buses.
Patent EP-0380242-A2 (EP)
Inventor: CHRAPLYVY ANDREW R
IPC: H01S5/12
Filed: 1990-01-18
Abstract: To overcome the deleterious effects of the nonuniform frequency modulation response in semiconductor lasers due to current injection in direct frequency modulation applications, it has been determined that the linewidth enhancement factor α be made as large as possible. In one embodiment, distributed feedback lasers well suited for frequency modulation lightwave communication systems are designed to have an integrated feedback element such as a corrugation grating whose effective pitch is selected to cause the Bragg wavelength and, therefore, the laser operating wavelength to be longer than the wavelength at substantially the maximum gain or gain peak in the semiconductor structure without the grating. That is, the wavelength of the grating is effectively detuned toward the longer wavelength and lower energy side of the peak of the gain profile. Such detuning increases the linewidth enhancement factor in such a way that the nonuniform frequency modulation response and its effects are minimized and, in some cases, substantially eliminated.
Patent EP-0387090-A2 (EP)
Inventor: MOLNAR CSABA
IPC: C07J71/00
Filed: 1990-03-09
Abstract: The invention relates to novel Δ¹⁴-16α,17-dihydroxy-pregnane-16,17-cyclic aldehyde acetal and -cyclic ketone ketal derivatives of general formula (I),
       
 wherein 
A stands for hydrogen or hydroxyl group; 
X stands for hydrogen or halogen with the proviso that if A is hydrogen, then X also means hydrogen; 
R stands for hydrogen,benzoyl or C₁ ⁻ ₈alkanoyl group; 
R¹ and R², which are the same or different, stand for hydrogen or a C₁ ⁻ ₄alkyl group; or one of R¹ and R² is hydrogen and the other is phenyl group; or R¹ and R² together form a C₄ ⁻ ₅alkylene group; 
 ---  means a single or double bond between two adjacent carbon atoms, 
as well as pharmaceutical compositions containing these compounds and a process for their preparation. 
     The compounds of general formula (I) possess a very strong antiinflammatory effect and only week harmful side effect. Thus, they can be used as active ingredients of antiinflammatory pharmaceutical compositions being useful in the therapy.
Patent EP-0390479-A2 (EP)
Inventor: MCEWAN VINCENT J
IPC: G09F13/04
Filed: 1990-03-27
Abstract: A light emitting diode cluster unit (10) suitable for use in outdoor display signs. A cluster (14) of LEDs on a circuit board (22) is housed in a first socket (26) open to its front and nested in an outer connector socket (16). Electrical connections (29, 30) are made from the rear of the first socket (26) via the connector socket (16) to a source of electricity. The connector socket (16) provides weather proofing and protects the circuit board (22) from torque. Moreover, the driver circuits of a display board into which the unit is connected may be shielded from ultraviolet rays. A tubular visor (12) may be provided to the front.
Patent EP-0408182-A2 (EP)
Inventor: GARNER HAROLD R
IPC: B01L7/00
Filed: 1990-05-25
Abstract: A temperature-controlled micropipette adaptor (100) includes a metal base (110) sandwiched between two plastic layers (112,114). The metal base has an orifice (120) to hold a micropipette (20). The plastic layers hold lenses (118,116) in alignment for spectrophotmetric measurements of a sample contained in a micropipette inserted into the orifice. A resistive heater wire (138) is held between the metal base and the plastic layer to transfer heat from the heater wire to the metal base and thus to the micropipette sample. A thermocouple (130) is attached to the metal layer to monitor temperature changes. A feedback control system is coupled to the device for monitoring and programmably controlling changes in temperature of the heated sample over time.
Patent EP-0408270-A2 (EP)
Inventor: MIYAKE RYO
IPC: B01F5/06
Filed: 1990-07-09
Abstract: A pipetter capable of mixing liquids and dispensing the mixed liquid has a pipetting tube (1,2,3), actuating means (10) connected to said tube for sucking liquid into and discharging liquid from said tube, and flow disturbance means (1) in said tube spaced from the discharge and suction end thereof and adapted to cause longitudinal mixing of liquid in said tube when liquid is moved along said tube in at least one direction. Mixing is effected in the tube by causing a liquid body to move repeatedly to and fro along said tube so that during each such movement at least a portion of the liquid body passes said flow disturbance means and said liquid body is not discharged from said first end of said tube. The pipetter is useful for example in mixing a suspension of blood cells with a reagent prior to analysis.
Patent EP-0409496-A2 (EP)
Inventor: COLQUHOUN HOWARD MATTHEW
IPC: B01D71/66
Filed: 1990-07-09
Abstract: A liquid phase-inversion process for the preparation of a microporous membrane from a solution in a latent solvent and a flexible microporous membrane comprising a highly crystalline aromatic polymer bearing in-chain ether or thioether and ketone linkage's described.
Patent EP-0412717-A2 (EP)
Inventor: NISHIMURA EIICHI OKI ELECTRIC
IPC: H04B10/2507
Filed: 1990-08-01
Abstract: There is described a system of optical repeated transmission comprising a signal transmission path comprising optical fibres (2, 4, 6 and 8) for transmitting signal light, and an optical amplifier comprising repeaters (3, 5, 7) disposed in the signal transmission path, and directly amplifying the signal light. In the described system, the amplification factor of the optical amplifier is not dependent on the direction of polarisation of the signal light that is input to it.
Patent EP-0419063-A2 (EP)
Inventor: HUGHES STEPHEN PAUL
IPC: B65D83/08
Filed: 1990-08-29
Abstract: A dispenser for dispensing disposable wipes or the like having an aperture (30) in one face of the dispenser through which wipes may be dispensed. The aperture comprises a central opening (32) and two relatively thin elongated openings (34) which extend out from either side of the central opening. Protuberances (38) protrude into the elongated openings (34) from each side thereof. The protuberance from one side of each opening is preferably located adjacent to the corresponding protuberance from the other side, in a staggered arrangement. 
     A dispenser is also provided which comprises a hopper (4) to hold at least one stack of wipes, the hopper being receivable in and pivotally attached to an outer casing (6), in such a way that with the outer casing resting on the ground, or secured to a wall, the hopper may be opened in order to insert a stack of wipes.
Patent EP-0447713-A2 (EP)
Inventor: SATO KATSUHARU C O PIONEER ELE
IPC: G01D5/30
Filed: 1990-11-07
Abstract: A position detector includes a light emitting component (5a,5a') for irradiating the surface (4a) of an object (4) whose position is to be measured. Two light receiving components (5b,5b') receive light reflected by the surface, a distance from one of the light receiving components to the measured surface as viewed in a direction substantially perpendicular to the surface being different from a distance from the other of the light receiving components to the surface. A calculating circuit (6) calculates a correction quantity for correcting the distances between the light receiving components and the surface, with the correction quantity being calculated on the basis of a difference between the output signals of the light receiving components. A moving component (12) corrects the distances between the measured surface and the light receiving components in accordance with the correction quantity. A first embodiment has two light receiving components (5b,5b') spaced at different distances from the surface. A second embodiment (Figs 8 and 9) has two light receiving components (5b,5b') disposed between two light emitting components (5a,5a') or two light emitting components disposed between two light receiving components. A third embodiment (Figs. 12 and 13) has two light receiving components (9b,9c) spaced the same distance from the surface, but at different distances from light emitting components (9a).
Patent EP-0429216-A2 (EP)
Inventor: BLONDER GREG E
IPC: G02F1/095
Filed: 1990-11-07
Abstract: An optical circulator/isolator (10) is implemented in a semiconductor package formed by a semiconductor substrate (22), which supports integral thin film waveguide polarization splitters and combiners (12, 14), and a semiconductor lid, which supports four spherical lenses (18) and a polarization rotator (16). The latter is a composite of at least two adjacent slabs of optically active material, one slab serving as a nonreciprocal 45° rotator (e.g., a Faraday rotator 16.1) and the other as a reciprocal 45° rotator (e.g., half-wave device 16.2). The lenses, serving both as beam expanders/condensers and as collimators, are positioned between the waveguide ends and major surfaces of the composite slab. When used with means for reversing the of the magnetic field in the nonreciprocal rotator, the device functions also as a switch. Also described are system architectures made possible by these devices; e.g., a single-fiber LAN having a ring architecture for non-interfering counter flow of information and a single fiber, bidirectional FTTH system for handling CATV and POTS. FIG. 1
Patent EP-0433129-A2 (EP)
Inventor: TUNG HSUEH SUNG
IPC: C07C19/08
Filed: 1990-12-04
Abstract: Purificn. of CCl2FCH3 comprises: (a) reacting anhydrous HF with CCl3CH3 or vinylidene chloride contg. dichloroacetylene to form CCl2FCH3; and (b) passing the CCl2FCH3 through activated C to remove unsatd. impurities. The unsatd. impurities are pred. dichloroacetylene and/or vinylidene chloride. The activated C pref. has particle size range of 0.005-10 mm, most pref. 0.1-2 mm.
Patent EP-0434586-A2 (EP)
Inventor: MAKI REINO A
IPC: G06Q10/08
Filed: 1990-11-13
Abstract: An attribute-based automated classification and retrieval system for group technology applications using a codeless classification system in which hierarchical classification structures are stored in a classification attribute file (20) and in which searches can be performed at any level in the classification structure. The relationship between entities and classification attributes are kept in an item classification parameters file (60) along with the parameter values associated with each entity-attribute pair. Queries on the data stored in the classification attribute file and item classification parameters file are stored alternately in a plurality of query results files (80) as successive queries are used to narrow the scope of a search.
Patent EP-0441265-A2 (EP)
Inventor: ASANO HIROYOSHI
IPC: D06M101/40
Filed: 1991-02-01
Abstract: The sizing agent for carbon fiber according to the invention is characterized by containing a high molecular compound having a weight average molecular weight of not less than 10,000 as obtainable by reacting (A) a polyalkylene oxide compound having a weight average molecular weight of not less than 100 as obtainable by addition-polymerizing an ethylene oxide-containing alkylene oxide with an organic compound containing two active hydrogen groups with (B) a polycarboxylic acid or the corresponding anhydride or lower alkyl ester or a diisocyanate. The sizing agent not only inhibits napping and binds fiber but, because of its good thermal decomposition behavior, does not cause glueing of fiber so that a substantial upgrading of carbon fiber is achieved without detracting from its strength. Furthermore, as the sizing agent does not become a tar, deposits within the carbonizing furnace are minimized and the trouble of furnace obstruction prevented.
Patent EP-0444650-A2 (EP)
Inventor: WATANABE NOZOMU C O NEC CORPOR
IPC: H03B28/00
Filed: 1991-02-27
Abstract: A frequency synthesizer using a phase-locked loop is disclosed. The frequency synthesis is accomplished by a closed loop arrangement which includes a digital phase detector, a fixed frequency divider with a divide value Nvd, a direct digital synthesizer, a loop filter (low-pass filter) and a voltage controlled oscillator. The direct digital synthesizer (DDS) produces a signal whose frequency is defined by a first preset frequency (Fd0) and a second preset frequency (δFd) multiplied by a suitable variable coefficient (m). The output frequency of the frequency synthesizer is determined by (Nvd·Fd0 + Nvd·δFd·m).
Patent EP-0445719-A2 (EP)
Inventor: YOSHIHARA TOHRU C O PIONEER EL
IPC: G01C21/28
Filed: 1991-03-05
Abstract: A navigation apparatus for a vehicle in which a self-supporting sensing system on the basis of a gyro, a geomagnetic sensor, a vehicle speed pulse generatore and the like, and a two-dimensional sensing system or a three-dimensional sensing system on the basis of a GPS (Global Positioning System) are suitably switched to effect sensing, and inforamtion such as a present position, a running locus and the like on the basis of the sensed results are displayed in a predetermined form of display on a display section, characterized in that the form of display is differentiated in response to the sensed states at the running points whether the sensed states are the self-supporting sensed state on the basis of said self-supporting sensing system, the two-dimensional sensed state on the basis of said two-dimensional sensing system or the three-dimensional sensed state on the basis of said three-dimensional sensing system.
Patent EP-0453811-A2 (EP)
Inventor: PECK DAVID E
IPC: B60T8/66
Filed: 1991-03-28
Abstract: An air brake system for a truck includes a treadle valve (10), a pilot control isolation valve (26), an exhaust valve (16), a relay valve (12), an air pressure transducer (18), a wheel speed sensor (22), an electronic control unit (ECU) (20) and an air brake chamber (13) associated with a brake actuator (14). In heavy braking operations, the pilot system pressure rise rate is monitored and restricted by modulation of the pilot control isolation valve (26). During heavy braking operations, if braking of the vehicle wheel results in a wheel velocity change which exceeds a predetermined deceleration threshold, the pressure rise rate is further restricted in attempt to "creep" up on the brake system pressure at which the lock condition is expected to occur. At another predetermined deceleration threshold, the brake system pressure is vented. The brake system pressure decreases resulting in a reduction in the applied brake force thereby permitting the vehicle wheel to roll back up to speed. The roll up rate is a function of the coefficient of friction of the road surface, the loading of the respective vehicle wheel and residual brake force remaining in the system. Empirical testing has revealed that a close approximation of the friction force available for stopping the vehicle may be made by use of the pilot system pressure when the vehicle wheel reaches minimum velocity and the time required to reach a certain wheel velocity greater than the minimum velocity. The friction force may be used to control parameters of operation of the antilock brake system during subsequent antilock cycles. For example, subsequent cycle brake system pressure rise rate is restricted by values determined from the friction force noted from previous cycles. Also, the deceleration condition at which the brake system pressure is exhausted and the pressure to which the system is exhausted are determined from the calculation of the friction force available during previous cycles.
Patent EP-0458311-A2 (EP)
Title: Multiple Reproduction System
Inventor: SIMON KARL-HEINZ DR
IPC: H04N5/335
Filed: 1991-05-23
Abstract: In a multiple electrooptical imaging system, the individual imaging units are coupled via an imaged dissector element which reproduces the image information (video signals) by forced synchronisation on a display. <IMAGE>
Patent EP-0476375-A2 (EP)
Inventor: BARTMANN GUENTHER
IPC: F15B15/16
Filed: 1991-08-28
Abstract: Two telescopic actuators (11, 21) which are mechanically (32) combined in each case via one of their members and which extend and retract under the pressure of a pressure medium, the extension pressure medium which acts on the second actuator (21) being fed by the first actuator (11) short-circuited (45) on the retraction side with the retraction side of the second actuator (21). Proposed as a space-saving conception is a first actuator (11) with only one lead-through (114, 115) which merges into a branching arrangement (441, 442), one branch (442) of which loads the extension pressure space (119) of the first actuator (11) and the other branch (441) of which loads the extension pressure space (216) of the second actuator (21), the lines (441, 442, 45) having individual safety means which can be influenced partly via control pressure and partly via 3/2-way solenoid valves to be operated together with the control spool (41), and at least the 2/2-way valve which protects the branch line (442) being equipped in a special manner for avoiding pressure shocks when the extension operation is initiated. <IMAGE>
Patent EP-0476455-A2 (EP)
Inventor: KOECHER JUERGEN DR
IPC: C07D417/04
Filed: 1991-09-06
Abstract: Phenyl-substituted 2-thiazolyl tetrazolium salt compounds characterized by a reflectance spectrum exhibiting an extended plateau above about 600-650 nm. Such compounds are useful as chromogenic indicators for reducing substances such as NADH. The reflectance plateau confers improved accuracy to analytical assays, particularly for the determination of analytes of medical diagnostic significance, in which a colorimetric response on a reagent carrier matrix is measured by reflectance.