baber/WOPTO huggingface dataset:
Patent FI-961795-A (FI)
Inventor: MILLER LARRY EUGENE
IPC: C11D1/75
Filed: 1996-04-26
Abstract: Amine oxide surfactants contaminated with nitrite are treated under acidic conditions with materials such as maleic acid and diethylenetriaminepentaacetate (DTPA) to reduce nitrite levels below 1 ppm. Thus, C12-13 dimethyl amine is oxidized with hydrogen peroxide in the presence of maleic acid and DTPA to reduce nitrite levels. The resulting nitrite-free amine oxide is employed in various detergent compositions.
Patent FI-973654-A (FI)
Inventor: GILMORE ROBERT P
IPC: H03L7/16
Filed: 1997-09-10
Abstract: A frequency synthesizer which uses a direct digital synthesizer (DDS) to generate a highly accurate periodic signal of a frequency selected from a plurality of reference frequencies. The DDS output signal is bandpass filtered utilizing a clean-up phase lock loop (PLL) to produce a spectrally pure reference signal and promote overall fast settling time. A second or primary phase lock loop, having a much faster settling time than the first PLL, adjusts the frequency of the reference signal generated by the clean-up PLL. In one embodiment, the DDS frequency synthesizer has a digital to analog (DAC) converter coupled to the clean-up PLL. Another embodiment uses a modified DDS (without a DAC or lookup table) and feeds the most significant bit (MSB) or overflow bit from the DAC accumulator into the "clean-up" PLL. In both embodiments, the resulting synthesizer has high spectral purity, fine frequency resolution and a fast settling time. Yet another embodiment uses a switching apparatus to bypass the "clean-up" PLL while it is settling on a new frequency. Once the "clean-up" PLL settles on the new frequency the switches are set to couple the "clean-up" PLL back into the synthesizer apparatus.
Patent FR-1605500-A (FR)
Title: Electrical resistant heating element for e.g. water heater - comprises wire coil on glass former inside evacuated glass cylinder
IPC: H05B3/44
Filed: 1968-09-10
Granted: 1977-06-24
Abstract: The heating element comprises an electrical resistance wound on to a glass cylinder. This resistance is connected to an electrode at each end, the electrodes forming caps over the ends of the glass cylinder. The assembly is placed inside a sealed outer glass tube which is evacuated. The connection ferrules are connected to the electrodes by silver solder. Mains supply is used to drive the heater element causing the bombardment of electrons into the space between the electrodes. The space has the effect of truncating the sine waves, and producing light rays, radioelectric waves, or electric radiation. The heating element may be used for heating panels, radiators, water heaters and demisters. It has a low power consumption, does not emit IR, and is not affected by salts in the water when used as a water heater.
Patent FR-1396581-A (FR)
Inventor: HENRY-BAUDOT JACQUES
IPC: H02K27/04
Filed: 1964-03-14
Granted: 1965-04-23
Abstract: 1,036,382. A.C. commutator motors. SOC. D'ELECTRONIQUE ET D'AUTOMATISME. March 12, 1965 [March 14, 1964], No. 10584/65. Heading H2A. In a stator-fed single-phase commutator motor the brushes 4 are connected by a rectifier so that armature current induced by the alternating stator flux #a interacts with a constant flux #c on the quadrature axis to produce the torque. Permanent or electromagnets may be used to give the constant flux. The armature is of printed circuit type and may be of cylindrical or discoidal form. In multipolar machines, the armature is wavewound and the A.C. and constant-flux poles may be grouped on opposite sectors of the machine. In the case of planor machines the two sets of poles may form concentric rings.
Patent GB-571655-A (GB)
Title: Improvements in or relating to safety valves for pressure vessels
IPC: F16K17/19
Filed: 1942-01-26
Abstract: 571,655. Safety valves. BRITISH THERMOSTAT CO., Ltd., and BUSH, E. J. Jan. 26, 1942, No. 1070. [Class 135] A safety - valve adapted to relieve both pressure and vacuum and comprising a movable' valve member co-operating with a movable valve seating has a passage extending through both of the valve components to enable the pressure to maintain both components in the closed position until excess pressure acting on a third member lifts the valve member off its seat. In the form shown in the Figure, a resilient seat 7 is supported by the rigid end 8 of a metallic bellows 9. An annular valve member 5 co-operating with the seat is slidably mounted in an inverted cup 11 adjustably loaded by a spring 10, a oup-washer 4 being arranged between these two components. A spindle 20 screwed into a boss 14 on the cup 11 carries an adjustable collar 15 and has a flanged tubular extension 19 slidable in a central guide 18. In the normal position, the flange 17 engages the guide 18 to prevent the spring 10 pressing the valve member into its seat. In this position, the valve member 5 is held to its seat by a light spring 21 and the pressure differential acting on the valve member. When pressure becomes excessive, the cup is lifted against the action of the spring 10, bringing the adjustable abutment 15 into contact with a bridge 16 on the valve member so lifting it from its seat. Sub-atmospheric pressure withdraws the seat away from the valve member which is prevented from following the seat by engagement of the parts 15, 16 and 17, 18.
Patent GB-119785-A (GB)
Title: Improvements in or relating to Clocks.
IPC: G04B1/22
Filed: 1918-01-18
Abstract: 119,785. Wade, H., (Differential Clock Co.). Jan. 18, 1918. Driving-mechanism, main spring.-The pinion 12 driven by the centre wheel is not integral with its wheel 19, but is connected by a helical spring 25, the pinion and wheel having pipes 12<a>, 19<a> which are gripped thereby. The portion of the spring 27 which is not wound about the pipes is short compared with the whole length, and the interval between the pipes is occupied by a split stationary core 16, the diameter of which can be adjusted by a cone 15. The unwinding of the primary motor spring turns the pinion 12 to wind the coils of the spring 25 into contact with the enlargement 16, and this action momentarily arrests further unwinding of the motor-spring.
Patent GB-752459-A (GB)
Title: Improved means for the elimination of backlash in screw-thread assemblies
Inventor: CROWLEY-MILLING MICHAEL
IPC: F16H25/20
Filed: 1954-01-14
Abstract: 752,459. Screw-and-nut gearing. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Dec. 6 1954 [Jan. 14, 1954], No. 1142/54. Class 80(3) In order to eliminate backlash between a lead screw 2 and a fixed part 1, the screw 2 is engaged by threaded portions 4, 5 at opposite ends of a cylindrical nut member 3 which is clamped by nuts .11, 12 in the part 1, the member 3 having a thin-walled central portion 13 which is weakened by three staggered pairs of partcircumferential slots so that by tightening the nuts 11, 12 the member 3 may be stretched and the distance between the portions 4, 5 thus increased to take up any backlash. In a modification only one clamping nut is provided, the other end of the member 3 having a flange abutting the part 1. The Acme thread shown may be replaced by a square thread.
Patent GB-552790-A (GB)
Title: Improvements in the welt turning mechanism of straight-bar knitting machines
IPC: D04B11/32
Filed: 1942-01-30
Abstract: 552,790. Knitting-machines. BLACKBURN & SONS, Ltd., G., START, H. W., and START, E. Jan. 30, 1942, No. 1281. [Class 74 (ii)] Mechanism is provided for automatically moving the welt hook bar A of a straight-bar machine longitudinally a short distance immediately after the loops have been received on the welt hooks C and when the loops have been returned to the needles so as to move the welt hooks laterally from under the sinkers. The lateral movement of the welt hooks prevents damage of the sinkers or welt hooks while permitting the knocking-over bits to work in their normal position. The lateral movement of the welt hooks is effected by a slide H engaging the end of the welt hook bar A under control of a spring J. Normally the spring is held inoperative by a lever K engaging an abutment D on the slide E which serves to move the welt hook bar A into position for the welt hooks to receive or return the knitted loops. When the slide E is withdrawn and the welt bar is under control of the usual supplementary take-up mechanism, the lever K is freed from the abutment D and the spring J actuates the slide H. An adjusting screw O on the slide H engages the framing of the machine to determine the adjusted position of the welt hook bar. Levers S actuated by abutments on the needle bar are provided for restoring the welt hooks to their normal position if they are raised by the upward movement of the needles. Specification 525,976 is referred to.
Patent GB-665120-A (GB)
Title: Improvements in or relating to instruments for use in plant operating through the combustion of fuel
IPC: G01K17/16
Filed: 1949-01-18
Abstract: 665,120. Measuring electrically. BAILEY METERS & CONTROLS, Ltd. Jan. 18, 1949. [Jan. 19, 1948] No. 1333/49. Class 40 (i). [Also in Group XXXVI] The rate at which heat is supplied to a furnace using solid fuel is deduced by (1) measuring the rate of flow of the products of combustion &c. in a meter AF; the movements of which are assumed to be proportional to changes in the rate of total air supply and which controls the position of the core of a differential transformer to provide a voltage proportional to such rate of flow, (2) causing an instrument R responsive to the composition of the product of combustion to produce by similar means a voltage in accordance with such composition across a resistor 55 and (3) causing a slider 58 on the latter resistor to maintain a position in which the voltage it picks up is equal to a pre-determined fraction of the voltage controlled by meter AF. In these conditions the position of the slider, which may be shown on an indicator 413 gives the rate of heat supply to the furnace. In the application shown, the position of the slider 58 also controls the core of a differential transformer 64 to provide a voltage across resistor 69 representing rate of supply of heat to the furnace. This is compared in systems which are otherwise identical with those described in Specification 656,538 with voltages representing rate of gain of heat by the feed water so as to give a continuous record of the efficiency of a steam-generating plant. Specification 660,105 is also referred to.
Patent GB-1414777-A (GB)
Title: Sheets including self-adhesive stamps or labels
IPC: G09F3/02
Filed: 1972-01-12
Abstract: 1414777 Laminated label sheet WALSALL SECURITY PRINTERS Ltd 9 Jan 1973 [12 Jan 1972] 1353/72 Heading B5N [Also in Division B8] A laminated sheet comprises a base sheet 2 treated with a silicone release agent and a printed facing sheet 1 provided with a selfadhesive layer on its inner face adjacent the base sheet, mutually-perpendicular rows 3 and 4 of perforations or rouletting extending through both the base and facing sheets to enable severing of the sheet into discrete parts, and lines of severance 7 extending through the facing sheet only and dividing the facing sheet of each discrete part into a separable stamp or label 5 and a remaining waste portion, the lines or severance permitting the peeling-off of the respective stamp or label whilst leaving the waste portion still adhered to the sheet. In modifications Figs. 3 and 4, the separable portions are in the form of rectangular or irregular die-cut portions 13 or 16. The sheet may be provided with printed marginal portions 6. The base and facing sheets may be of paper, plastics, or celluloid.
Patent GB-1419652-A (GB)
Title: Vehicle levelling system
IPC: F16F9/00
Filed: 1973-01-10
Abstract: 1419652 Adjusting suspension height MONROE BELGIUM NV 10 Jan 1973 [11 Jan 1972] 1401/73 Heading B7D The attitude between the sprung and unsprung parts of a vehicle is controlled by a system having one or more gas pressure operated struts 12, 14 directly connected to a gas source and a combination valve and switch assembly responsive to change of attitude of the sprung part to either energize a compressor unit 28 or open a valve 62 thereby restoring the attitude to normal. When the sprung part of the vehicle drops below a predetermined level relative to the unsprung part, switch 61 closes, energizing a motor 35 driving the compressor and increasing the air pressure until the level is restored. Similarly if a predetermined level is exceeded lever 56 opens valve 62 to the atmosphere reducing the pressure to restore the level to normal. In a modification the excess air is released into a reservoir (72) from which it can be drawn by the compressor for re-use.
Patent GB-407500-A (GB)
Title: Improvements in or relating to the cooling of water in cooling towers
IPC: F28C1/00
Filed: 1933-01-16
Abstract: 407,500. Spraying-apparatus. MOUCHEL & PARTNERS, Ltd., L. G., and GUERITTE, A. T. J., 36, Victoria Street, London. Jan. 16, 1933, No. 1443. [Class 69 (iii).] Water delivered from supply troughs in cooling-towers is electrified to produce very fine drops, whereby cooling by evaporation and by contact with the ascending air stream is facilitated. The distribution troughs b, Fig. 1, may be provided with electrodes a positively charged with upwards of 10,000 volts direct current, the splash cups d being earthed. Alternatively spaced metal network sheets g, Fig. 2 may be charged and earthed alternately, and the water sprayed from the usual nozzles f is electrified as it falls between the sheets, which are inclined to catch the drops. If lathwork is employed it may be reduced in quantity. With alternating current an appreciable effect is produced from 2000 volts upwards.
Patent GB-1018401-A (GB)
Title: Improvements in or relating to inorganic polymers
Inventor: GEBBETT DONALD ALBERT
IPC: C01B35/14
Filed: 1961-01-13
Abstract: Inorganic polymers are produced by heating metal oxides with an alkali metal phosphate which is defined as "an alkali metal dihydrogen phosphate, a partially condensed dihydrogen phosphate, a metaphosphate glass, a cyclic metaphosphate or a polyphosphate" (the term polyphosphate excludes polymetaphosphates as used in Specification 922,384) partially hydrated or hydrolysed materials as above or mixtures thereof, and which materials may contain mixed alkali metals.  The oxides used are oxides of elements which are lower than phosphones and higher than lithium in the electronegativity scale.  The heating is preferably effected at 100-800 DEG  C. and may be under pressure in a mould, a second heating at 500-700 DEG  C. may also be employed.  The oxides used may be MgO, Al2O3, ZnO, Fe2O3 or B2O3 or oxide containing materials, e.g. china clay, asbestos, and fuller's earth.  The preferred amount of phosphate is 5-65% by weight. Friction bodies may be made by incorporation of abrasive grains e.g. corundum, emery, bauxite, alundum, agate, carborundum, diamond, garnet, beryl and topaz.
Patent GB-669220-A (GB)
Title: Manufacture of 4-nitro-1-aminonaphthalene-5-sulphonic acid
Filed: 1950-01-19
Abstract: 4 - Nitro - 1 - aminonaphthalene - 5 - sulphonic acid is prepared by nitrating 1-aminonaphthalene-5-sulphonic acid at a temperature below 0 DEG  C. with concentrated nitric acid.  The nitraton may be effected with mixed acid, i.e. a mixture of concentrated sulphuric and concentrated nitric acid.  Preferably the mixed acid is practically anhydrous apart from the water produced in the reaction. In the example, the above compound is prepared using mixed acid. Specification 9498/99, [Class 2], is referred to.
Patent GB-746095-A (GB)
Title: Manufacture of condensation products
IPC: C08G8/30
Filed: 1954-01-19
Abstract: Vinyl aromatic compounds, e.g. styrene, a -methyl styrene, vinyl naphthalene and vinyl carbazole are reacted with a bis-phenol, e.g. bis - (4.41 - hydrophenyl -) methane in the presence of a natural or synthetic bleaching earth catalyst to give viscous or solid resinous products.  A suspension or solution of bisphenol, e.g. bis-(4,4-hydroxyphenyl-) propane in benzene, toluene, xylene or carbon tetrachloride is heated with the catalyst to about 80 DEG  C. and styrene or a mixture of styrene and a -methyl styrene added slowly.  In a modification both components are mixed in solution with the catalyst, and the temperature slowly raised to 70-80 DEG  C.  The catalyst is separated by filtration and the solvent distilled off, preferably under reduced pressure.
Patent GB-802353-A (GB)
Title: Cleaning apparatus
IPC: A47L9/06
Filed: 1955-01-19
Abstract: 802,353. Suction cleaners. WESSEL, H. Jan. 19, 1955 [Jan. 23, 1954 ; Feb. 26, 1954], No. 1605/55. Addition to 763,340. Class 8(1). A suction cleaner nozzle comprises a main set of bristle tufts 91 and in front of these in the direction of movement, a plurality of suction slots 89, at least one transverse side of each slot being bounded by a group of bristle tufts 90 which prevent tilting of the nozzle. The bristle tufts may be embedded in the nozzle or formed on units separately inserted into the nozzle. An elastic protective rib may be provided in the main set and transverse groups of bristle tufts.
Patent GB-103995-A (GB)
Title: Improvements in or relating to Bedsteads.
Inventor: HANSEN ANDERS PETER MOLLER
IPC: A47C20/08
Filed: 1917-02-01
Abstract: 103,995. Hansen, A. P. M., and Nielsen, A. Feb. 8, 1916, [Convention date]. Bed-rests; bedstead adjustments. - In a bedstead provided with a head-rest adapted to be raised or lowered by the occupant, the head-rest 4 is hinged at 21 to the mattress frame 1, adjustment of the rest being effected by means of a cord 6 attached to an arm 10 and to a link 5 pivoted to the rest. The rest carries a pulley 8 which is constrained to run on a cord 9 fastened to the part 1 and wrapped round the shaft 17 on which the arm 10 is mounted. The arm 10 is also connected to a spring 18. A toothed wheel 12 is fast on the shaft 17 and is locked by a tooth 13 on a spring 11. A lever 2 is rotatably mounted on the shaft 17 and is fitted with a slide 14 having a tooth 15 thereon to engage the wheel 12, and a cam 16 to engage the spring 11. The slide 14 is operated by means of a handle 20 and rod 3 to disengage the tooth 13 and engage the tooth 15, whereby the lever 2 is locked to the shaft 17, the adjustment of the bed-rest being effected by the operation of the lever.
Patent GB-1450481-A (GB)
Title: Developer composition and developing method
IPC: G03G9/087
Filed: 1974-01-15
Abstract: 1450481 Electrostatographic toner particles FUJI XEROX CO Ltd 15 Jan 1974 [16 Jan 1973] 01780/74 Heading C3P [Also in Division G2] A pulverized coloured xerographic toner is prepared by polymerizing at least one ethylenically unsaturated monomer in the presence of a cross-linking agent having at least two polymerizable double bonds per molecule in an amount of 0À005-20% based on the weight of monomer, and of a chain transfer agent in an amount of 0-20 wt. per cent based on the weight of monomer, pulverizing the polymer, and mixing the polymer with a colouring agent before or after said pulverization. The toner particle size is preferably 4-20 microns, or less than 1 micron for powder cloud development processes. In the examples, toner particles comprising copolymers of ethylene glycol dimethacrylate (as cross linker) with styrene, styrene and n-butyl methacrylate and methyl methacrylate and butyl acrylate are prepared. Carbon black is used as the colourant.
Patent GB-1260316-A (GB)
Title: Tubular heating elements and magnesia insulation therefor and method of production
IPC: H05B3/48
Filed: 1969-01-13
Abstract: 1,260,316. Metal-sheathed heating elements. GENERAL ELECTRIC CO. 13 Jan., 1969 [1 Feb., 1968], No. 1854/69. Heading H5H. [Also in Division C1] A tubular heating element including a metal sheath enclosing a coaxial coiled resistor contains a compacted polycrystalline. electrical insulating mass filling the space between the resistor and the sheath,. which mass is formed from a composition comprising a uniform mixture of granular fused magnesia and from 0À1 to 5À0 per cent by weight of an electrically non-conducting additive in a particulate form, said additive having a structure of the layer type and being boron nitride or a mixture thereof with a silicate, said composition at 85 per cent of its theoretical density having a specific impedance of at least 50 megohm/ins at 1526 F. The preferred additives are a mixture of boron nitride with talc or boron nitride with pyrophillite. The additive may be present in an amount of 2% by wt.
Patent GB-1035524-A (GB)
Title: Alternate action electric switch mechanism
IPC: H01H13/58
Filed: 1963-01-15
Abstract: 1,035,524. Ratchet gearing. BURGESS PRODUCTS CO. Ltd. Jan. 15, 1963 [Jan. 15, 1962], No. 1887/63. Heading F2Q. [Also in Division H2] In a push-button electric switch, which is switched on and off by successive depression of a plunger 29, a pawl member 20, pivoted in slots 23 in parallel side plates, is pressed down to engage a ratchet wheel 10 and rotate it through 45 degrees so that a square cam 12 depresses a lever 13 to actuate the switch 2. The cam and pawl are retained in this position by engagement of the corner of the cam in a depression 17 in lever 13 but release of plunger 29 allows pawl 20 to return, at the same time riding over the ratchet tooth and making the necessary lateral movement by moving slightly outwards in slots 23. The subsequent depression of plunger 29 causes a further 45 degrees rotation of the cam so that the lever 13 is allowed to rise.
Patent GB-526874-A (GB)
Title: Improvements in or relating to relaxation oscillatory circuits
IPC: H03K3/08
Filed: 1939-01-19
Abstract: 526,874. Valve generating circuits. FIDES GES. FUR DIE VERWALTUNG UND VERWERTUNG VON GEWERBLICHEN SCHUTZRECHTEN. Jan. 19, 1939, No. 1907. Convention date, Jan. 19, 1938. [Class 40 (v)] A frequency divider comprises a relaxation oscillator of the kind in which transitions occur between two states, at least one of which is " quasi-stable ", that is a state which in the absence of control pulses persists for a finite time after which the oscillator automatically returns itself to the other state, as in the well known multivibrator. The impulses to be divided initiate transition from one state to the other, but means are provided for preventing the impulses from initiating transitions in the reverse direction, the oscillator itself effecting such transiton without interference by the impulses. Such means may comprise voltages generated during one state which are fed back to render the control impulses ineffective during this state. In the hexode oscillator shown in Fig. 5, the control pulses are applied via terminals 1, 2 to grid G1, the relaxation condenser C is connected to grids G2, G3, and G4 is a screen grid at a fixed potential. Voltages fed back from the anode through resistance RS are applied to a network comprising resistances R6, R7, R8 and dry rectifiers Gl1, Gl2, the arrangement being such that in one state the rectifiers Gl1, Gl2 have a low resistance and permit the control pulses to pass to the grid G1 whereas in the other state the rectifiers have a high resistance and block the control pulses. In a modified circuit, Fig. 10 (not shown) direct potentials are applied to the first grid to reduce variations of the relaxation frequency due to ageing of the cathode, and fluctuations of the anode voltage and heating current. Three known relaxation oscillators in which the relaxation condenser is connected to two grids of a tetrode, pentode and hexode respectively are described in connection with Figs. 1, 3, 4 (not shown). The Specification as open to inspection under Sect. 91 also describes a simple relaxation oscillator in which a condenser discharges through a glow lamp in which synchronizing pulses are fed to the lamp through a dry rectifier which is biased by the voltages produced in such a way that alternate pulses are suppressed. This subject-matter does nof appear in the Specification as accepted.