baber/WOPTO huggingface dataset:
Patent GB-897012-A (GB)
Title: Improvements in or relating to the conversion of dolomite
IPC: C01F5/14
Filed: 1959-05-29
Abstract: In a process for converting slaked, calcined dolomite into magnesium hydroxide, an initial magnesium brine (saturated in sodium chloride and containing magnesium sulphate in addition to chlorides) is mixed with a recycled brine richer <PICT:0897012/III/1> in calcium chloride than the initial brine, gypsum is crystallized from the mixed brine in a desulphating step, mother liquor from the desulphating step is mixed with the slaked calcined dolomite in a first converting step partially to convert the dolomite into magnesium hydroxide and to produce a concentrated brine richer in calcium chloride which is recycled for mixing with the initial brine, the partially converted dolomite is removed from the first converting step to a second converting step and the conversion continued by mixing it with magnesium-containing brine which is more dilute than the mother liquor and is obtained by diluting mother liquor from the desulphating step with water.  A brine containing magnesium chloride and sulphate obtained by concentrating sea water is supplied to a vessel S1, where it is desulphated by mixing with recycled brine containing calcium chloride from a vessel S2.  Mother liquor from vessel S1 is passed to a vessel T containing slaked calcined dolomite, where some of the magnesium chloride in the brine reacts with some of the calcium hydroxide from the dolomite to form magnesium hydroxide and calcium chloride.  After decanting, the liquid containing sufficient calcium chloride for calcium sulphate to be formed, passes to vessel S2 where calcium sulphate is precipitated and removed.  Owing to delay in the formation of calcium sulphate crystals, they are not precipitated in vessel T. Liquid containing calcium chloride is also passed from vessel S2 to vessel S1 where calcium sulphate is also precipitated and removed.  The partially converted dolomite is passed from vessel T to a vessel C and contacted with desulphated brine from vessel S2, the brine after reaction with the dolomite in vessel C being returned to vessel S2, and the partially converted dolomite is passed to a vessel D1.  The conversion is completed in a series of vessels D1, D2 and D3 and the produc washed in a series of vessels L1, L2 and L3, desulphated brine entering vessel D3 from vessel S1 and diluted with wash water from L1, the diluted brine flowing in countercurrent to the slaked calcined dolomite being converted.  Water for washing enters L3 and flows in countercurrent to the product. French Specification 1,207,075 is referred to.
Patent GB-530479-A (GB)
Title: Improvements relating to billiard cues
IPC: A63D15/08
Filed: 1939-06-26
Abstract: 530,479. Billiard cues. COIA, C. June 26, 1939, No. 18500. [Class 132 (ii)] A billiard cue has its butt end protected by a metal ferrule C and a rubber &c. cushion E with the object of avoiding splitting of the cue or noise produced by knocking the cue on the floor.
Patent GB-1210985-A (GB)
Title: Modified polylactam and blends thereof with polyester
Inventor: REINSCHUESSEL HERBERT KURT
IPC: C08L77/00
Filed: 1969-04-10
Abstract: 1,210,985. Polylactam-polyester films and fibres. ALLIED CHEMICAL CORP. 10 April, 1969 [11 April, 1968], No. 18577/69. Heading B5B. [Also in Division C3] A film or fibre is prepared from a composition containing 50-90% modified polylactam and 50-10% polyester by compression moulding at 240-265 C. followed by quick quenching. The 0À38 mm. film is then oriented by drawing at 150 C. with draw-ratio 4:1. The composition may be heated to 280 C. for up to 4 hours before moulding, which causes the polyester particles to agglomerate and settle out of the blend, forming a non-uniform dispersion. The films have the high tear-resistance.
Patent GB-894992-A (GB)
Title: Improvements in textile combing machines
Inventor: GREENHALGH FRED
IPC: D01G31/00
Filed: 1957-06-13
Abstract: 894,992. Machinery guards. PHILIPSON & CO. (BOLTON) Ltd. June 12, 1958 [June 13, 1957], No. 18634/57. Class 80 (4). The pivotal guard E of a combing machine is mechanically interlocked with the longitudinally-movable starting rod A of the machine by means of a flange F on a disc carried by the guard pivot-pin, said flange having an aperture co-operating with a cranked extension a<SP>1</SP> of the starting rod. When the guard E is closed the rod A may be pulled forward, by means of a knob a thereon, to start the machine, the extension a<SP>1</SP> then entering the aperture in the flange F to lock the guard closed. When the rod A is moved rearwardly to stop the machine the guard may be opened, the periphery of the flange F then lying in the path of the extension a<SP>1</SP> to prevent starting of the machine while the guard is open. The guard is counterbalanced by an eccentric disc G on the pivot-pin. At the rear of the machine the rod A is coupled by a rod C to a rotatable rod B extending the length of the machine and carrying a cam actuating a switch controlling the machine motor. The rod B also carries an arm H provided with a stop h coacting with the lid j of the machine waste bin J to prevent its removal while the machine is running.
Patent GB-685682-A (GB)
Title: Improvements in time-delay circuits, time bases and similar electric circuits
IPC: H03H11/26
Filed: 1948-07-12
Abstract: 685,682. Valve relay circuits. MULLARD RADIO VALVE CO., Ltd., and GRIMSDELL, G. D. July 22, 1949 [July 12, 1948], No. 18648/48. Class 40 (vi). In a time delay circuit in which a capacitor is charged or discharged through a resistor, thereby influencing the current flow in a valve so that after a predetermined time interval the valve current reaches a value so that an associated relay is actuated, the valve current flows through a non-linear impedance thus modifying the variation of the valve current with time and thus altering the time interval. Fig. 2 shows a delay circuit in which when switch 4 is made capacitor 12 is charged by the voltage produced across the non-linear resistor 7 which has a resistance value which decreases with increase of voltage across it, or of current flow through it, e.g. a resistor composed of material having the Registered Trade Mark of " Metrosil." The grid voltage of valve 1 increases, but is offset by the voltage drop across resistor 7 so that the anode current slowly increases until relay 3 operates and the time period is terminated. The non-linear resistor 7 provides a longer time period than would be obtained with a corresponding linear resistor, Fig. 3 (not shown). The non-linear resistor may be temperature dependent, e.g. a resistor composed of material having the Trade Name of " Varite." The current growth in valve 1 and thus the time period will then depend upon the length of time for which the circuit has been switched off, Fig. 4 (not shown), and may be used to ensure that the anode voltage is applied to a hotcathode discharge tube when the heater has been switched on after a time period dependent upon the time interval for which the tube has been switched off. A screen-grid valve may be used and the non-linear resistor may be connected between the screen grid and H.T. source, thus modifying the screen grid voltage as the cathode current of the valve changes. The change of valve current with time may be also modified by controlling the state of current of the valve by an additional valve circuit, e.g. the additional valve circuit may be arranged to maintain the voltage between cathode and anode or screen grid substantially constant, Fig. 6 (not shown). Fig. 5 shows a modification in which when the voltage across resistor 7, which may be linear, has risen sufficiently, neon tube 13 fires the current through it, being limited by resistor 14. When the neon 13 has fired the voltage across it falls, thus causing the cathode current of valve 1 to suddenly rise and operate relay 3.
Patent GB-921323-A (GB)
Title: Substituted hydrazide compounds
Inventor: YATES CLAIRE HILLIARD
IPC: C07C243/32
Filed: 1960-05-23
Abstract: The invention comprises benzilhydrazides of the general formula: <FORM:0921323/IV(a)/1> and their acid addition salts in which R is ethyl, isopropyl, sec-butyl, cyclohexyl, and a ,a 1-dimethylisopropyl.  The hydrazides are prepared by reducing the corresponding hydrazones of the formula <FORM:0921323/IV(a)/2> wherein R1 is a hydrogen atom or a methyl or ethyl group and R2 is a methyl or ethyl group or =CR1R2 is cyclohexyl, preferably with hydrogen and a metallic hydrogenation catalyst or with a metal hydride, the hydrazones being prepared by condensing benzilhydrazide with an appropriate aldehyde or ketone.
Patent GB-427153-A (GB)
Title: Suction actuated governors for internal combustion engines
IPC: F02D9/00
Filed: 1934-06-25
Abstract: 427,153. Speed governors. SOC. GENERALE DES CARBURATEURS ZENITH, 10, Rue Petitot, Geneva, Switzerland. June 25, 1934, No. 18749. Convention date, June 26, 1933. [Class 57] A piston 25 is loaded by a spring 27 and is connected to the throttle valve 5 of an internalcombustion engine. The cylinder 24 is connected through a valve 22 to a chamber 12 connected by port 14 to the induction pipe. The valve 22 is connected to a spring-loaded piston 20 so that when the engine speed exceeds a predetermined limit the force caused by the vacuum upon the piston 20 opens the valve 22 and permits the vacuum to act upon the piston 25 to close the valve 5. A disc 16 attached to the spindle 6 has a shaped port controlling the opening of the port 17 leading to the chamber 12 to adjust the leakage of air in relation to the position of valve 5. The spindle 6 has a recess 8 in which is located a pin 11 fixed to a lever 7 actuated by the driver. In an alternative construction the piston 20 is replaced by two pistons, one exposed to suction before the throttle valve 5 and the other to suction after the valve 5.
Patent GB-708108-A (GB)
Title: Stabilization of acrylonitrile
IPC: C05C7/00
Filed: 1952-07-24
Abstract: In a modification of the invention of the parent Specification hydroquinone mono-methyl ether is used in place of hydroquinone monobenzyl ether.ALSO:In a modification of the invention of the parent Specification hydroquinone monomethyl ether is used in place of hydroquinone monobenzyl ether.
Patent GB-596149-A (GB)
Title: Foldable push-chair, such as a child's perambulator and the like
IPC: B62B7/10
Filed: 1945-07-23
Abstract: 596,149. Folding vehicles. STRUBI, M. July 23, 1945, No. 18788. [Classes 108 (i) and 108 (ii)] In a folding push chair, cycle trailer, &c. having retractable wheels, the wheels are mounted on inclined arms which are moved outwardly in opposite directions whereby the wheels move upwardly into the hollow sides of the pram. As shown, the body 1 has hollow walls to receive the retractable wheels 4, a fixed base 2, hinged back rest 14, the body having a hinged part 22 to allow the back rest to be adjusted to a reclining position, a foldable hood 24 slidable longitudinally of the body, a hinged foot-rest 16 and cover 20 and a hinged telescopic handle 26, 27. The wheels are supported on arms 5 fixed to axles 6, 7 having levers 8, 9 fixed at their mid lengths to the axles such that when the wheels are pulled down against spring pressure (not shown) they are retained in this position by hooks 12, 13 hinged to the body at 10, 11. The axles may be of small cross-section to act as torsion springs and the locking arms 12, 13 may be telescopic and act against spring pressure. The footrest 16 is foldable against the body and is retained in adjusted position by links 19 and hooks 18, the cover 20 being secured to the body and footrest by press-studs. This cover is removed and stowed away in the rear of the push chair when the chair is to be folded, another cover 20 attached to the hinged part 22 of the body being brought forward and attached to the footrest by the press studs. The telescopic handle 26. 27 is hinged by a disc 25 to the body and is locked to the body by spring catches in front or rear inclined positions or parallel to the floor 2, the part 27 being reversed in the part 26 when the part 26 acts as a supporting leg and the part 27 as a carrying handle for a collapsed chair. The pram can be converted into a cycle trailer by using one pair of wheels only.
Patent GB-855909-A (GB)
Title: Improvements relating to gas burners
Inventor: BARRATT ERIC
IPC: F23D14/58
Filed: 1956-06-18
Abstract: 855,909. Gas burners. BRITISH THOMSON-HOUSTON CO. Ltd. June 18, 1957 [June 18, 1956], No. 18828/56. Class 75(1). A gas burner comprises two sets of coplanar slots 8 superposed in pairs, each slot having a rectangular outlet and being separated from the adjacent slot by a thin plate 5 whereby the gases emerging from the outlets immediately' mix. The burner shown has two rows of superposed pairs of slots 8 which are staggered. The burner is made up from recessed plates 1, 2 separated by a spacing member comprising a thin metal sheet 5 disposed between two plates 7 having rectangular notches forming the slots 8. The separate gases to be burned are supplied by pipes 6 to the chambers formed by the recesses in the plates 1, 2. The length of the metal sheet 5 may be reduced to allow some mixing of the gases within the burner outlets. In a modified construction the burner is annular with the gas outlets directed inwardly. A plurality of rings of gas outlets may be provided. Specifications 2919/09, 233,278, 407,425 and 725,673 are referred to.
Patent GB-214891-A (GB)
Title: Improvements in epicyclic variable speed gearing for aero engines
IPC: B64D27/00
Filed: 1923-07-23
Abstract: 214,891. Rowledge, A. J., and Rolls- Royce, Ltd. July 23, 1923. Variable, - speed epicyclic gearing .-Gearing for aero engines yielding two different reduced speeds is operated by applying brakes alternatively to two loose sun gears f, g. Stepped planet gears i<8>, i<9> carried by the driven shaft e mesh with these sun gears and with an internallytoothed gear d<5> fast upon the engine shaft d. The brakes k<7>, k<6> are of the multipleplate type and are housed in a fixed drum k. They are applied by lateral movement of a ring k<3> between them effect-ed by means of inclined slots k<4>, Fig. 2.
Patent GB-1513751-A (GB)
Title: Electrical cable stripping apparatus
IPC: H02G1/12
Filed: 1975-05-06
Abstract: 1513751 Stripping cables LEE GREEN PRECISION INDUSTRIES LTD 6 May 1975 18920/75 Heading H2C Cable cutting and stripping apparatus comprises a plurality of cutter heads, Fig. 2, wherein blades 14 cut through a layer of a coaxial cable inserted into a cable receiving channel, the depth of cut being adjusted by an annular thrust bearing member 17 which is movable parallel with the cable axis to exert a radial force on bevelled surfaces 15 on the blade supports, and the position of the cut being determined, for example, by a stop in the cable receiving channel. Outer and inner coverings are cut at respective stop positions. A plurality of cutter heads are either mounted side by side or in one embodiment (Figs 3, 4, not shown) are mounted in a rotating turret. The cable being held in a clamp which is slidable along the cable axis and inserted into the cutter heads as they are sequentially brought opposite the cable.
Patent GB-718260-A (GB)
Title: Ceramic transducer for underwater sound transmission and reception
IPC: B06B1/06
Filed: 1952-02-21
Abstract: 718,260. Piezo-electric instruments. BENDIX AVIATION CORPORATION. Feb. 21, 1952, [March 6, 1951], No. 18976/53. Divided out of 718,203. Class 40 (4). In an electro-mechanical transducer for translating compressional waves in a fluid into electrical waves comprising an annular, radially-vibratile piezo-electric element 60 of polycrystalline ceramic having thin electrodes 60A, 60B on its inner and outer surfaces, the element 60 is closed at one end by a solid, sound or supersonic vibrationreflecting backing member 63 whilst the other end is open to the fluid medium. The transducer is enclosed in a fluid-tight casing 20 having a cap 21 of rubber with the same sound-transmitting properties as the liquid for which the transducer is designed, and the element together with the solid backing member 63 is surrounded in a mass of sound-insulating material 64. The space between the element and the front cap 21 is filled with a suitable, sound-transmitting fluid. In a modification, Fig. 2, four elements 60 are embedded in recesses 67 in a backing plate 63A so that the front face of the element is flush with the front face of the backing member. Specifications 583,639 and 601,477, [both in Group V], are referred to.
Patent GB-577165-A (GB)
Title: Improvements in and relating to galvanic batteries for mine firing systems and like submarine apparatus
IPC: H01M6/34
Filed: 1930-06-21
Abstract: 577,165. Galvanic batteries. MOORE, H. R. G., and GOLLOP, H. June 21, 1930, No. 19001. [Class 53] [Also in Group XXI] A battery for firing mines &c. in the sea and activated by the sea water is arranged so that the sea can enter the battery only when current is required. Fig. 1 shows a part of a battery comprising an outer casing divided by partitions p into a number of compartments each containing positive and negative electrodes of plate form. The positive electrodes consist of silver gauze or silver-plated copper or other metal gauze which is impregnated with silver chloride applied in the molten state. The negative electrodes are of zinc or magnesium or a magnesium alloy. The electrodes are separated by sheets of corrugated and perforated celluloid and holes are provided in the casing for the entry of sea water. In cases where the battery is to yield a single instantaneous firing current the partitions p may be dispensed with. Fig. 3 shows a portion of a mine in which the battery is housed in a compartment f sealed by a lead or other metal diaphragm d which may be backed by a rigid perforated plate e. Attached to the diaphragm d is a rigid rod c which when forcibly deflected tears away the diaphragm and allows sea water to enter the compartment f and activate the battery. Fig. 6 shows a safety circuit for cutting out a battery when the mine horn has been damaged in laying or in the case of a horn being defective. The battery is at first short-circuited through a line i. and fuse k until the mooring switch h operates to close the detonator circuit l and open the line i. Alternatively a separate detonator with blowing charge may be employed to sink a damaged mine. In another arrangement a mooring rope safety switch may be employed which will maintain the mine safe for a sufficient time to allow any accidentally flooded battery to become exhausted by discharge through a low resistance safety circuit.
Patent GB-969593-A (GB)
Title: Improvements in and relating to accelerometers
Inventor: FALKNER ERIC ARTHUR
IPC: G01P15/03
Filed: 1962-05-17
Abstract: 969,593. Accelerometers. HAIRLOK CO. Ltd. May 13, 1963 [May 17, 1962], No. 19056/62. Heading G1K. A shock indicator comprises a base 1 supporting two pairs of pillars 2, 3, the inner face of each pillar having near the top a cup socket 4 in which seats a ball 5 held by one of two helical compression springs 6, 7. The compression can be adjusted through screw slots 8. A screw through a hole 9 in the base 1 may secure the indicator to the container of any cargo it is desired to monitor for shock in transit. A transparent cover 10 e.g. of polystyrene prevents disturbance of the balls by direct impact and also retains the balls and springs should they be dislodged.
Patent GB-354486-A (GB)
Title: Improvements in and relating to the mounting of rail vehicle axles
IPC: B61F15/00
Filed: 1930-06-23
Abstract: 354,486. Vehicle-axle bearings. MALEY, A. W., 4, Grosvenor Road, and TAUNTON, E. M., 11, Wilton Road, both in Handsworth, Birmingham. June 23, 1930, No. 19098. [Class 12 (i).] End thrust of a vehicle axle 2 having a plain bearing 3 is taken up by a thrust ball bearing. The inner race 4 of the ball bearing is fixed to the axle 2 and the outer race 7 is housed in a two-part steel cage 8 capable of sliding vertically in grooves in the axle-box 1. The inner end of the box 1 is closed by a dust-collar consisting of a collar 10 fitted on the shaft and containing a felt ring 11 and washer 13 pressed against the axle-box by a spring 12.
Patent GB-1188267-A (GB)
Title: Frequency Transducer
IPC: G01R23/02
Filed: 1968-04-23
Abstract: 1,188,267. Frequency discriminators. GENERAL ELECTRIC CO. 23 April, 1968 [23 June, 1967], No. 19107/68. Heading H3A. A frequency discriminator comprises: a circuit 35, 36 for sensing zero crossing of the input signal; a pulse generator 33 which initiates a pulse a fixed time after one of the zero crossings and which terminates the pulse at the next zero crossing; and a circuit 34 which indicates the duration of the pulses. At the instant when terminal 10 goes negative with respect to terminal 11, transistor 37 cuts off and capacitor 40 commences to charge from the constant voltage developed across network 23. After a fixed time period depending on the voltage set by Zener diode 24 transistor 42 switches on to switch on transistor 45 and initiate an output pulse. At the next zero crossing, when terminal 10 goes positive, transistor 37 switches on to turn off transistors 42, 45 and terminate the output pulse. During the next half cycle when terminal 10 is positive, circuits 36, 30, 32 act in a similar manner to that of circuits 35, 27, 31 in the previous half cycle and produce a further output pulse. The output pulses have a duration proportional to the period of the input signal, and the average current is indicated on meter 47.
Patent GB-823821-A (GB)
Title: Improvements relating to the chucking of workpieces in lathes and the like
IPC: B23B31/10
Filed: 1957-06-18
Abstract: 823,821. Chuck-jaw-setting templates. MOORES, C. C. June 18, 1958 [June 18, 1957], No. 19109/57. Class 83 (3). A templet for use in pre-shaping soft chuck jaws so as to be concentric with the work to be gripped, comprises a number of sets of concentric arcuate steps A<SP>1</SP>-A<SP>3</SP>, E<SP>1</SP>-E<SP>3</SP> &c. for engagement by the jaws whilst their gripping surfaces are being machined. The templet is placed against the chuck face and is set concentrically with a lathe &c. axis, by its central boss G engaging a pilot on a tool-turret &c., or with the aid of graduations on the chuck face, and the jaws are then clamped on to the appropriate steps A<SP>1</SP>-A<SP>3</SP> &c. whilst their axiallyprojecting surfaces are machined. The templet may be cut from sheet plate &c. or may be cast, and it may contain more than three sets of steps, particularly for two jaw chucks. The steps are preferably undercut at F, H to clear the chuck jaws, and the arcuate length of each step is more than half the width of a jaw. The steps may be provided on the inside of a ring- shaped templet for an internally gripping chuck.
Patent GB-214523-A (GB)
Title: Improvements in or relating to portable gas producer plant
IPC: C10J3/44
Filed: 1923-07-26
Abstract: 214,523. Ward, J. E., and Wells Vegetable Fuel Power Co., Ltd. July 26, 1923. Fire-bars and grates. - The ash-pit of a gas producer is provided with finger-shaped fire-bars t, hinged grates u, and a hinged ash-pan s.
Patent GB-381572-A (GB)
Title: Improvements relating to curtain rails
IPC: A47H1/06
Filed: 1931-07-03
Abstract: 381,572. Curtain rails. HARRISON (BIRMINGHAM), Ltd. and ILES, H., Brad ford Street Works, Birmingham. July 3, 1931, No. 19194. [Class 104 (ii).] A curtain rail of I-section is formed by folding a thin metal strip, the portion at the fold being shaped to provide one of the flanges b, and the free edges of the strip being turned outwards in opposite directions to provide the other flange c. Specifications 244,618, [Class 104 (ii), Railway and tramway permanent way &c.], and 321,045, [Class 52 (v), Window, stair, and like furniture &c.], are referred to.