baber/WOPTO huggingface dataset:
Patent GB-268130-A (GB)
Title: Improvements in or relating to alternating current measuring instruments
IPC: G01R27/02
Filed: 1926-03-26
Abstract: 268,130. Dunglinson, B., (Republic Flow Meters Co.). March 26, 1926. Current meters; resistances, measuring.-An alternating current measuring instrument for indicating the value of the current that would obtain in a circuit having an impressed voltage of a certain arbitrary fixed value has a conducting disc 7 acted upon inductively by a magnetic system 3, 4 energized by the current to be measured and also by a second magnetic system 5, 6 producing a restoring force which varies with the applied potential, and also, due to the shape of the disc 7, to the position of the disc. The disc 7 has a spiral edge so that the amount of the disc protruding into the airgap of the pressure magnet 5, 6 varies with the position of the disc. The current magnet 3, 4 is situated within the spiral edge and its action on the disc is consequently independent of the position of the latter. The magnet 3, 4 is excited by current coils 11, 12 wound so as to produce alternate poles and connected in the measuring circuit in series with a variable resistance 16 to effect adjustment of the control. The pressure magnet 5, 6 is excited by coils 13, 14 connected so as to produce alternate poles and to produce a torque on the disc in the opposite direction to that produced by the current magnet. The coils 13, 14 may be wound with resistance wire. A highly inductive exciting coil 15 surrounds the tour poles 3 - 6 and is connected to the source of voltage supplying the measuring circuit. The entire magnetic system is movable angularly about the axis of the moving system to permit adjustment of the zero. A light spring or weight control may be provided to ensure return of the moving system to zero when the instrument is disconnected. In place of bipolar magnets, shaded-pole magnets may be employed. A separate exciting coil may be used for each magnet core. Lack of rotational symmetry in the rotating member may be produced by means other than a spiral-edged disc. The pressure and current magnets may be interchanged, or the effect of both may be arranged to be dependent on the position of the disc. The instrument may be calibrated to give direct measurements of rate of fluid flow or other measurements which are caused to influence the relationship of current to impressed voltage in the measuring circuit, and may record as well as indicate. According to the Provisional Specification, the disc may be brought back to zero position by means of a conducting ring or copper shroud surrounding one or both pole-pieces of the pressure magnet so as to produce an additional field which coacts with the main fields to apply a slightly eccentric'force to the disc; this produces a moment which is balanced by the controlling force when the disc is in zero position. The pressure and current coils may be wound on one polepiece only, arranged so that the field due to the current coil is not symmetrical with the main field. The magnetic circuits of the pressure and current magnets may have a common portion. Specification 267 583 is referred to.
Patent GB-791180-A (GB)
Title: Improvements in or relating to methods of producing dry stable vitamin a and/or d preparations
IPC: A23K20/00
Filed: 1956-03-16
Abstract: Products containing vitamin A and/or vitamin D which are stable in admixture with mineral preparations and mixtures of mineral preparations and protein concentrates are made by adding to a vitamin A and/or vitamin D material at least 2g. of 4-methyl-2,6-ditertiary-butylphenol per 100 Standard Units of vitamin A and/or vitamin D, dispersing this mixture in liquid or molten state in an aqueous liquid containing a jellifiable, film-forming colloid, and converting the dispersion to small, dry particles, e.g., by dispersing the dispersion in warm castor oil or paraffin oil, cooling to produce particles, and dissolving off the oil by hexane, acetone, ethanol, isopropanol, methyl ethyl ketone or n-propanol, or by spraying the dispersion into a hot chamber.  The colloids are exemplified by gelatine, blood albumen, lactalbumin, carboxymethylcellulose, methyl cellulose, starch and hydrolyzed starch.  The dispersion preferably contains a carbohydrate such as lactose, glucose or maltose.  A mineral mixture of calcium carbonate, steamed bone meal, dicalcium phosphate, iodized sodium chloride, magnesium, ferrous, copper, manganese and cobalt sulphates and a protein concentrate of soybean, fish, blood and sunflower seed meals are referred to.ALSO:A method of producing a dry, free-flowing mineral stable Vitamin A and/or D preparation comprises adding to a Vitamin A and/or D phase at least 2 gm. of 4-methyl-2,6-ditertiary-butyl phenol per 100 Standard Units (i.e. 108 International Units) of Vitamin A and/or D, dispersing this mixture in a liquid or molten state in an aqueous liquid containing a jellifiable film-forming colloid and working up this aqueous emulsion to obtain small dry particles.  These particles may be produced by dispersing the aqueous emulsion in an oil such as castor or paraffin oil while warm and cooling to produce discrete particles after which the oil is removed by a suitable solvent, e.g. hexane, acetone, ethanol, isopropanol, methylethyl ketone or n-propanol. Alternatively the particles may be produced by spraying the emulsion into a hot air chamber.  The film-forming colloids used may be proteins, e.g. gelatine, blood albumen, or lactalbumin, carboxymethylcellulose, methylcellulose or starch.  Preferably the aqueous emulsion contains also one or more carbohydrates, e.g. lactose, glucose or maltose.  A "mineral stable preparation" is defined as being one which, having been mixed with mineral mixtures or protein concentrates in dilutions of 1 to 1000 or more, and being kept at room temperature in an atmosphere of at least 55 per cent relative humidity will have a vitamin content of at least 70 per cent of the initial vitamin content after a six months' storage period.  The dry preparations may be made up into pills or tablets or mixed with food preparations.
Patent GB-681674-A (GB)
Title: Improvements relating to the output stages of high frequency oscillators or transmitters
IPC: H03F3/22
Filed: 1951-04-10
Abstract: 681,674. Valve amplifying circuits. TESLA, NARODNI PODNIK, and KLIKA, V. April 10, 1961 [April 11, 1950], No. 8339/51. Class 40 (vi). In a power amplifier, an even number of valves, at least four, each with grid and anode tuned circuits are arranged in a closed array and adjacent valves operate in phase opposition. The grids of the valves 1 are energized over coupling coil 7 and tuned circuits 2, R.F. power being withdrawn over coupling coil 8 from an anode tuned circuit 6. The capacitors in the grid circuits may be ganged, also those in the anode.circuits and the coils 7, 8 may be coupled to more than one tuned circuit. Capacitors 4 are provided for neutralizing purposes, and the anodes are energized over a common choke 10. An alternative arrangement employed four valves, Fig. 2 (not shown), is described in which tuning is accomplished by an earthed piston moving axially between the anodes of the valves.
Patent GB-661053-A (GB)
Title: Improvements in and relating to saturable reactor magnetic amplifiers
IPC: H03F9/04
Filed: 1949-03-28
Abstract: 661,053. Magnetic amplifiers. BRITISH THOMSON-HOUSTON CO., Ltd. March 28, 1949 [April 2, 1948], No. 8371/49. Class 40 (iv). [Also in Group XXXV] A voltage doubler magnetic amplifier, Fig. 1, comprises (1) a saturable three-limbed core split longitudinally along the centre limb 2 which carries a short-circuited winding 10 and one or more control or signal windings 8, 9; (2) two reactor windings 6, 7 wound respectively on the outer core limbs; (3) two parallel connected circuits (see equivalent circuit, Fig. 2) fed with A.C. at 1 and each comprising reactor windings 6, 7, rectifiers 11, 12 and capacitors 13, 14, respectively, with the capacitors 13, 14 connected together across the load 15. With two control or signal windings 8, 9 as shown, a bias signal may be applied to one winding and a varying signal to the other or two signals may be applied to the two windings respectively to obtain an output proportional to the sum or difference between the two. The L and C of the two parallel circuits may be so chosen that each circuit is series resonant at a frequency below the frequency of the applied A.C.; for example, if the latter is 60 c/s. the reactor windings and capacitors may be tuned to 7 to 10 c/s. In operation the two parallel connected circuits are respectively conducting during opposite half-cycles of the applied A.C. and reactor windings 6, 7 correspondingly produce additive unidirectional fluxes and subtractive or phase opposition alternating fluxes in centre limb 2. Short-circuited winding 10 tends to prevent any net alternating flux (due to flux in one section of limb 2 not being exactly balanced by 180 degrees apart flux in the other section of limb 2) from introducing induced voltages or circulating currents in the signal windings. The unidirectional fluxes tend to partially saturate the magnetic core and the amplifier is regenerative because any increase in saturation of the core produced by a direct current in signal winding 8 or 9 reduces the effective inductance of the reactor windings 6, 7 and causes larger direct currents to flow therethrough; this in turn further increases the saturation of the core. The split core construction producing air-gap at 5 preferably of the order <SP>1</SP>/ 32  to <SP>1</SP>/ 16  inch is stated to reduce hysteresis effects and thus prevent masking of feeble applied signals, for example, with D.C. applied signals as small as 1.0 micro-rnicrowatt, there is an amplifier power gain of over one million.
Patent GB-558669-A (GB)
Title: Improvements in or relating to types for typographical printing
IPC: B41B1/02
Filed: 1942-06-18
Abstract: 558,669. Types ; type matrices. BLANCHARD, J. T. June 18, 1942, No. 8388. Convention date, July 2, 1941. Drawings to Specification. [Classes 100 (ii) and 100 (iii)] Types and moulds therefor for typographic printing comprise units representing the main body parts of the letters and auxiliary units representing parts complementary to the main body parts, so that by combining the type or mould units together in different ways, different forms of the same letters may be obtained, and additional units representing strokes or flourishes, applicable to the main body parts or the auxiliary units, to provide for the prin- 'ing of fancy characters, such as initials.
Patent GB-579115-A (GB)
Title: Improvements in or relating to apparatus for timing impulses
IPC: G04D7/12
Filed: 1942-06-19
Abstract: 579,115. Testing clocks. KOHLHAGEN, W. June 19, 1942, No. 8472. [Class 139] [Also in Group XL] Apparatus for timing impulses comprises an electrical pick-up device responsive to each beat of a time piece, in circuit with a pair of interacting, gas-filled, electronic-discharge tubes and means causing the said tubes to assume an out-of-phase relationship and to cause one thereof to act as a snuffer for the other, whereby only alternate beats of the time-piece are passed on to an indicator. As shown in the Figure, a microphone 11 or photo-electric cell converts the ticking of a watch 10 into electrical impulses which pass through an amplifier 13 to the grids of two out-of-phase, gasfilled, electronic-discharge tubes A and B, so arranged and of such a frequency that tube A ionises and snuffs out tube B at each tick, while tube B. ionises and snuffs out tube A at each tock. A switch 36 is manually operated to connect one or other tube to a third tube C which therefore ionises at alternate beats of the watch to divert part of the normally horizontal beam 17, appearing on the screen of an oscillograph 14 controlled by a standard time-piece, into a vertical flash 44. Variation from synchronism with the standard frequency will cause the flash 44 to move to the left or to the right according to whether the beat is fast or slow.
Patent GB-1222243-A (GB)
Title: Generating plasma
IPC: H05H1/30
Filed: 1968-02-22
Abstract: 1,222,243. Plasma generators. KEARNSTRIBUNE CORP., J. E. HOGLE, and G. H. HOGLE. 22 Feb., 1968 [5 July, 1967; 12 Jan., 1968], No. 8613/68. Heading H5H. A self-initiating plasma generator 10 utilizes a radio frequency induction coil 30 directly electrically connected at 84 to a conductive hollow electrode tube 82 through which gas is passed, the tube being capacitatively coupled to earth potential, and the gas being excited to ionized plasma as it issues from the tube 82, initiation of a plasma discharge 108 occurring spontaneously. The generator shield or casing 12 is of aluminium and is at earth potential due to a resilient wipe 66 connected to a metal sleeve 58 connected in turn via a coaxial cable earth lead 52 to a radio frequency generator. Shield 12 acts as one condenser plate and tube 82 as the other condenser plate of the capacitative coupling. Lead 54 from the R.F. generator is connected to a metal sleeve 72 and via a short lead 74, with suitable impedance matching, to an intermediate turn 70 of coil 30, which is arranged on an insulating gas inlet tube 32. Metal sleeve 58 is connected via a short lead 64 to earthed end 56 of coil 30. Coolant flows through the plasma generator 10 via inlet and outlet sleeves 72 and 58, impinging from tube 102 on the boron nitride tip 90 of generator 10, which tip is replaceable, and has a restricted orifice 92. Casing 12 is filled with air, liquid coolant or ceramic material, Fig. 4 (not shown). Radio-frequency coil 30, electrode tube 82 and the metal shield or casing 12 form a tank circuit with a high inductance to capacitance ratio giving a minimum reactance value of about 1000 ohms at a chosen plasma operating frequency. Thegenerator 10 operates on monatomic or diatomic gases, or combinations thereof. The discharge may be coupled to conductive or non- conductive substances, including air. The generator has application to mineral separation and recovery, high temperature chemistry, high speed cutting, and cauterizing or cutting lining tissue.
Patent GB-1019804-A (GB)
Title: High-speed dynamo-electric machine rotor
IPC: H02K9/19
Filed: 1963-03-04
Abstract: 1,019,804. Cooling dynamo-electric machine rotors. MEZ BRNO, NARODNI PODNIK. March 4, 1963 [March 9, 1962], No. 8614/63. Heading H2A. A high-speed dynamoelectric machine rotor 1 is cooled by a liquid which is injected from a stationary tube 5 into the inlet opening of an aligned and closely spaced tube 2 located in and rotating with a mainly smooth coaxial bore 14 in the rotor, the tube extending axially beyond the rotor bearings 13, located in a plurality of places by short equispaced longitudinal ribs 3 projecting radially from the tube, and having a bore diameter larger than that of the inlet opening. The latter is formed by a jet 4, and the liquid after flowing through the tube is reversed by a number 7 to pass through the rotor bore 14 and leave at an outlet 12 where it is prevented from entering the bearing 13 by compressed air. The member 7 acts as a pump, and a speed of 100,000 r.p.m. is mentioned.
Patent GB-943210-A (GB)
Title: Improvements in or relating to foot-treadle-operated machines
IPC: B25C5/16
Filed: 1960-03-11
Abstract: 943,210. Stapling machines. E. H. COLE. March 9, 1961 [March 11, 1960], No. 8621/60. Drawings to Specification. Heading B4C. [Also in Division B7] A heavy-duty stapling machine has a pillartype stand and is operated by a foot-pedal (see Division B7) which can be mounted on either side of the pedestal base of the pillar and can be adjusted at will to give two or more leverage conditions. A vertical bar attached to the pedal-end operates a pivoted arm to move a stapling head in and out of contact with staple clencher. The clencher is at the top of a column carried on the outer end of an arm which is clamped on the pillar below the stapling head.
Patent GB-214237-A (GB)
IPC: C07F9/70
Filed: 1924-04-05
Abstract: Complex metal compounds of amino-arsenobenzenes are prepared by treating an aminoarsenobenzene having as substituent in an amino group a residue containing oxygen, such as .CH2.COOH, .CH2.SO3H. .CH2.SO2H, COONa, SO3H, .CH2.CHOH.CH2OH (see Specification 226,686), with an oxide or hydroxide of a metal such as copper, silver or gold, in neutral or alkaline solution.  The compounds are soluble in water to solutions stable to carbon dioxide and having trypanocidal properties.  In examples are described silver, gold, and copper compounds from the formaldehyde sulphoxylate of 4 : 41-dioxy-3 : 31-diaminoarsenobenzene (see Specifications 7865/12 and 8219/12), and silver compounds from sodium arsenophenylglycine, the carbamate of bismethylamino-3 : 31-5 : 51-tetraminoarsenobenzene, and the formaldehyde-bisulphite compound of 4 : 41-dioxy-3 : 31-diaminoarsenobenzene.  Specifications 24420/12 and 2314/14 also are referred to.
Patent GB-811904-A (GB)
Title: Arrangement for regulating fuel injection in mixture-compressing injection internal combustion engines
IPC: F02D9/00
Filed: 1957-03-15
Abstract: 811,904. Regulating; starting fuel-ignition engines. DAIMLER-BENZ A.G. March 15, 1957 [March 15, 1956], No. 8666/57. Classes 7(3) and 7(6). The control rod 49 of a fuel injection pump is connected to a lever 47 pivotally mounted on the end of a bell crank lever 46 and connected by a pin-and-slot connection 51 to a second lever 30 which is pivoted at 29 and moved by a cam 28 in accordance with engine speed and throttle opening, the position of the rod as set by the cam 28 being adjusted in accordance with air pressure or temperature by the lever 46. The cam 28 is adjusted angularly by a governor 16 actuating a lever 18 carrying a rack 22 engaging a pinion 23 on the shaft 24 of the cam 28, which shaft is slidable axially by a lever 26 connected to the throttle valve operating mechanism. The lever 47 is mounted in a forked portion of the lever 30 and the lever 46 on which it is pivoted is adjusted in accordance with atmospheric pressure and the temperature of the intake air by a bellows 40 and thermostat 38 respectively, the levers 47, 30, being arranged parallel to one another at minimum fuel supply so that the effect produced by adjustment of the lever 46 is zero at minimum fuel supply and increases as the fuel supply increases. The lever 30 is pivoted at 29 on a slidable bar 32 controlled by a thermostat 34 responsive to cooling water temperature, the bar being moved to the left when the engine is cold to provide an increased fuel supply and to open a passage 61 connected to the intake pipe downstream of the throttle valve to provide an increased supply of air for idling. An excessive fuel supply for starting is obtained by energization of an electromagnet 56 which which rotates lever 53 to move lever 30 in the increased fuel direction.
Patent GB-807451-A (GB)
Title: Improvements in and relating to the shutter mechanism of photographic cameras
IPC: G03B9/58
Filed: 1956-03-20
Abstract: 807,451. Photo-electric control of camera shutters. GENERAL ELECTRIC CO. March 20, 1956 [March 31, 1955], No. 8673/56. Class 40 (3). A camera shutter has a power drive controlled by a photo-cell such that shutter operation is automatically initiated by a predetermined radiation change. In the embodiment described (see Fig. 4) shutter X is operated by armature 41 of relay 40 whose coil 42 is energized (i) via relay switch 46 controlled by conduction in thyratron 49 by A.C. from source S via the resistance between photo-cell conductors 31, 31<SP>1</SP> when reduced by incident light, or (ii) via relay switch 281 operated by bridge network R when incident light reduces sufficiently the resistance between the photo-cell conductors. In case (i) the shutter is adjusted for operation at a desired exposure interval setting, opening automatically in response to light on the photocell from for example an aerial flare and closing automatically at the conclusion of the desired interval by timing means not described; in case (ii) the shutter is opened prior to the incidence of illumination, e.g. at the instant of release of a photo-flash bomb from an aircraft, by the momentary closure of normally open switch 53 and the shutter is subsequently closed at a predetermined time after the incidence of illumination causes operation of relay switch 28, this predetermined time being a function of the resistance of resistor 54 connected via normally-closed switch 28<SP>1</SP> across relay coil 26. Switch 45 is as shown for case (i) and is changed over for case (ii). In an alternative to the bridge rectifier circuit, coil 26 may be in series with a rectifier and photo-cell conductors 31, 31<SP>1</SP>. Specifications 796,974 and 807,450 are referred to.
Patent GB-895478-A (GB)
Title: Improvements in or relating to cellulosic material
IPC: D06M10/08
Filed: 1960-03-11
Abstract: An activated but physically substantially undergraded cellulosic textile material capable of taking part in a graft reaction with a graftable chemical substance is produced by subjecting the material to suitable ionizing electromagnetic radiation such as X-rays or gamma rays at a dosage of from 103 to 107 Roentgen.  Substances which may be grafted on to the activated material include compounds incapable of polymerization such as quaternary ammonium compounds, phenols, silicones, dyes, or organo-metallic compounds such as tributyl tin oxide, phenyl mercury metaborate or tributyl tin acetate, polymers such as polyethylene, a polymethacrylate or polyvinyl chloride, softeners such as the triethanolamine salt of oleylsarcoside, cetyldimethylbenzyl ammonium chloride, stearyl triethanolamine and stearyl-ethylenediamine formate, or polymerizable monomers such as an acrylate or methacrylate, acrylamide, styrene, vinyl acetate, vinyl chloride, vinylidene chloride, ethylene, butadiene or isoprene or mixtures thereof.  Polymerization of the monomer may be affected with the aid of a redox system which may be applied simultaneously with the monomer or previously, polymerization being assisted by heating.  Prior to irradiation the textile material may be treated with a chemical substance such as an acrylic, methacrylic, crotonic or cinnamic ester, an allyl ether, acrylonitrile, an ethylene imine compound, or an o-, m- or p-substituted benzene carboxylic acid or alcohol or a derivative thereof such as p-isopropyl benzoyl chloride.  The cellulosic material may be protected against excessive decomposition by irradiation by treatment with cysteine, cystine, pyrogeallol or methane sulphonyl chloride prior to irradiation.
Patent GB-871841-A (GB)
Title: Improvements in or relating to cabinets, particularly refrigerator cabinets
Inventor: LONGMAN CECIL WALTER
IPC: B60B33/04
Filed: 1959-03-13
Abstract: 871,841. Castors. PRESSED STEEL CO. Ltd. March 8, 1960 [March 13, 1959], No. 8730/59. Class 52(1). A castor comprises a wheel 15 journalled in a U-shaped bracket 11 which is welded to a cabinet at one end 13 and carries a wedge 17 which locks the wheel on pushing the plate 18 and releases it on pushing the plate 19. The head of the screw 21 bears on the bottom of the cabinet and allows the height of the cabinet above the wheel to be adjusted.