baber/WOPTO huggingface dataset:
Patent GB-608533-A (GB)
Title: Improvements in or relating to control systems for electric motors and the like
IPC: H02J13/00
Filed: 1946-02-26
Abstract: 608,533. Signalling over power circuits. BROOKE, W., and BALDWIN, H. T. Feb. 26, 1946, No. 5944. [Class 40 (iv)] In a polyphase A.C. distribution system a contactor D is operated through a thyratron J from a remote point B by providing neutral points N 1 , N 2  and completing the circuit through earth. Normally the grid J 2  goes negative as the anode J 1  -goes positive, but when switch B is closed, the inductance M displaces the phase of the grid voltage with respect to the anode voltage, as described in Specification 568,336, [Group XXXVII], and allows the thyratron to fire, so operating contactor D. If the distribution line has an earthed neutral a rectifier H is inserted in the earth connection to prevent the control circuit being short-circuited thereby.
Patent GB-457158-A (GB)
Title: Improvements relating to the production of low molecular weight olefine polymers
IPC: C07C2/14
Filed: 1936-02-28
Abstract: An acid extract of olefines is heated rapidly, i.e. for less than 5 mins., whereby the yield of low-boiling polymers such as di-isobutene and isobutene-butene copolymers is increased. Olefine-containing material, particularly a butene cut, is absorbed in a suitable acid such as 60--70 per cent sulphuric or 80--90 per cent phosphoric acid. The solution is heated very rapidly as by steam to 90--120 DEG  C., when a polymer layer separates and may be distilled to separate the dimers.  In examples, a 70 per cent sulphuric acid is contacted with a C4 cut until it contains 60 volumes per cent of isobutene.  On heating to 80--90 DEG  C. by the usual method in about 15 mins., the polymer layer contains about 10 per cent by volume of dimer; on rapidly heating p  to 90 DEG  C., in about 45 secs. by passing through a steam-heated tube containing Raschig rings, it contains 45 per cent di-isobutene and, at 120 DEG  C., about 60--70 per cent.  A 65 per cent sulphuric acid containing much isobutene when similarly heated rapidly to 120 DEG  C., gives a polymer which is 80 per cent dimer.  The ratio of di-isobutene to copolymers of butene and isobutene can be increased by shortening the time of contact of the acid with the olefinic material.  The polymers are added in amounts of 5--50 per cent or more by volume to motor fuels or are used alone as such.ALSO:Olefine polymers having a high content of di-isobutylene and other low-boiling polymers, e.g. copolymers of isobutylene and butylene, prepared by heating an acid extract of olefines rapidly, i.e. for less than 5 mins., are added in amounts of 5--50 per cent or more by volume to motor fuels or are used alone as such.
Patent GB-1112074-A (GB)
Title: Improvements in or relating to epoxide resins
Inventor: DOBINSON BRYAN
IPC: C08G59/14
Filed: 1966-02-11
Abstract: The hydroxyl group content of an OH-containing epoxy resin is reduced by reaction with a compound <FORM:1112074/C3/1> in which one of X and Y is H and the other is Me or H.  Z is either a -CN group or an alkoxy-carbonyl group containing up to 6 carbon atoms.  Examples of (I) are acrylonitrile and ethyl acrylate.  Reaction may take place in the presence of a catalytic amount of a base, e.g. an alkali metal alkoxide, a tertiary amine or a quaternar ammonium hydroxide.  (I) may be more volatile than the epoxy resin being treated, it may be used in excess and the residue distilled after reaction.  Reaction may take place in an inert solvent, e.g. toluene. The resultant resin may be cured by conventional hardeners.
Patent GB-576373-A (GB)
Title: Device for use in the removal of roof supporting bars or beams in mines and for similar purposes
IPC: E21D15/60
Filed: 1944-04-01
Abstract: 576,373. Clamps ; friction-grip fastenings. BOOTH, J. W. April 1, 1944, No. 6072. [Class 44] [Also in Group XXX] A device for use in the removal of roof supporting bars or beams, in mines comprises a collar 1 to which is pivoted a lever 3 having one end formed as a cam face 6 and the other provided with a hook 8 for attachment to a pulling device. The collar is slid over the end of the bar to be removed.
Patent GB-766971-A (GB)
Title: Improvements relating to corrosion resistant steel springs and spring material
IPC: C21D9/02
Filed: 1955-03-01
Abstract: Springs are produced from nickel chromium alloy steel, which, after annealing, is austenitic and has such stability that the temperature at which 50 per cent of the austenite is transformed to martensite after deformation in tension equivalent to a true strain of 30 per cent is between 20 DEG C. -20 DEG C., which is quench annealed, subjected to cold working with a reduction in area of at least 50 per cent and not more than 70 per cent at a temperature such that it contains 40-75 per cent martensite, and then tempered at 350-550 DEG C.  The alloy composition may be 0.07-0.2 per cent C, 0.-01 per cent N, 14-20 per cent Cr, 7-12 percent Ni, 0.2-2.0 per cent Si, 0.4-2.0 per cent Mn, 0-4 per cent Mo, 0-10 per cent Co, the balance being iron and impurities.  The alloy may also contain up to 1 per cent of each of W, Ti, Nb, Ta, Cu, V and Al.  The cold working, e.g. rolling, may be performed at temperatures below room temperature. Specification 722,427 is referred to.
Patent GB-928959-A (GB)
Title: Improvements in or connected with weighing apparatus incorporating ticket printing mechanism
Inventor: WOLVERSON OLIVER ARTHUR GERALD
IPC: G01G23/18
Filed: 1961-02-20
Abstract: 928,959. Weighing apparatus. W. & T. AVERY Ltd. Feb. 20, 1962 [Feb. 20, 1961], No. 6096/61. Class 143. Ticket - printing mechanism, in weighing apparatus, comprising essentially a toothed wheel B and a reciprocable rod A, has an anti-fraud device which includes a rotatable member mounted for engagement with the wheel during movement of the rod towards the wheel so that the member is turned from a given rear position by rotation of the wheel if the weighing mechanism is not properly conditioned for the weight to be printed. The rotatable member is a vane 15 carrying a rubber buffer 16 positioned for frictional engagement with the periphery of the toothed wheel B in the forward position of the rod A. The vane 15 is rotatably mounted at the lower end of an arm 11 which can swing from a bracket 10. A pin 14 on an arm 13 which projects obliquely upwards from the rod A restrains the arm 11 from swinging towards the wheel B when the rod A is retracted. On manual operation of the shaft C of the ticket pointer the rod A is thrust towards the toothed wheel B by a spring and the arm 11 swings forward, advancing the buffer 16 towards the wheel B. The vane 15 has a slot 17 into which a finger 18, carried by the rod A, enters, provided the wheel B is stationary, and full forward movement of the rod A is therefore permitted, removing a thrust block 24 from the path of a cam 25 and allowing rotation of the manually-operated shaft 25 to be completed to complete the printing operation. Should the weighing apparatus not have arrived at equilibrium the wheel B is still moving and if it is then attempted to operate the printer the wheel B, through the rubber buffer 16, will rotate the vane 15 from its rest position and move the slot 17 out of line with the finger 18. To prevent the anti-fraud device from failing to function due to sudden movement of the shaft C a dash-pot 23 controls the rod A through linkage 21, 22. To prevent operation if the change-weight device is improperly set, the unit weight differential rod D is connected to an arm 30 on a pivoted quadrant 31 in which are recesses 33, into which recesses a peg 34 carried by the rod A can only enter if the change-weight device is properly positioned. The lower end of the rod D is guided by a slot 37 and the flexibility of a spring 39 allows movement of the rod if the unit weights are operated with the peg 34 in a recess 33.
Patent GB-326644-A (GB)
Title: Aircraft supporting surfaces
IPC: B64C23/00
Filed: 1929-02-25
Abstract: 326,644. Armstrong Whitworth Aircraft, Ltd., Sir W. G., Green, F. M., and Reynolds, R. Feb. 25, 1929. Planes, construction of; balancing.-The upper surface of an aeroplane wing is provided with vents 4, 9 parallel to and respectively near the leading edge and near the junction of the wing and its aileron, these vents communicating with a region of higher pressure at the wing tip. The air intakes may be controlled by valves or louvres which may be interconnected with the ailerons. The lateral edge of the wing is bevelled to present a slope towards the underside, or it may be given a forward rake to provide an air intake. Fig. 6 shows a plate 8 interconnected with an aileron 6 for controlling the inlet through the end of the wing, the inlet being closed when the aileron is in its normal position. Fig.. 12 shows an alternative control comprising louvres 10 which may ba set to deflect air into or out of the wing. During a. spin these. louvres may be set in opposite directions to increase and diminish the lifts on the two wings.
Patent GB-1294721-A (GB)
Title: Apparatus for plugging cased petroleum production wells
Inventor: LAJARTE GUY DE
IPC: E21B33/136
Filed: 1970-02-09
Abstract: 1294721 Wells ENTREPRISE DE RECHERCHES ET D'ACTIVITIES PETROLIERES 9 Feb 1970 [26 Feb 1969] 6104/70 Heading E1F Apparatus for plugging tube-lined petroleum production wells comprises upper and lower sets 4 and 3 of knives with springs 7 to urge them outwardly to grip the well casing, and basket blades 9 each provided with a flexible strip 10 which urges the blade outwardly. In use the apparatus is lowered down the production string until spring blades 23 on the actuating tool T pass beyond the end of the string. The blades are then enabled to bow outwardly, raising a sleeve 26 and thus releasing balls 28. A spring 22 urges a rod 1 downwardly causing the knives 3 to pass beyond the end of a sleeve 6 and to open out to grip the casing. The knives 4 are released to grip the casing by the actuating tool and the sleeve 6 being pulled upwardly. A jarring action shears a pin 20 allowing the tool and sleeve 6 to be removed and basket blades 9 to open out. Gravel or glass beads are poured onto the basket blades, with cement being lowered in a tool (Fig. 4) having a glass disc which is broken by the tool engaging the gravel. Alternatively the gravel can be lowered in a containerin the bottom of the tool.
Patent GB-244618-A (GB)
Title: Improvements relating to rails for curtain runners
IPC: A47H1/06
Filed: 1925-03-06
Abstract: 244,618. Harrison, S. C., and Iles, H. March 6, 1925. Curtain rods. - A ourtain rail of T-section is formed by folding a sheet metal strip so that a continuous double thickness of metal occurs at the flanges a and the web b, the seam being formed by one edge c of the strip overlapping the other edge at one side of the web at or near its free edge.
Patent GB-256290-A (GB)
Title: Improvements in pneumatic wheel tyres
IPC: B60C9/02
Filed: 1925-03-07
Abstract: 256,290. Kerr, F. F. March 7. 1925. Jackets and covers.-A single-ply cord foundation for a tyre cover is formed by a continuouslywound cord 3 enclosing endless retaining wires 1. The cords may be connected by weaker interwoven or stitched threads 4. In the form shown, the wires 1 are formed by multiple convolutions or windings with a textile wrapping 2. Specification 6585/11 is referred to.
Patent GB-215494-A (GB)
Title: Improvements in sparking plugs
IPC: H01T13/32
Filed: 1923-03-05
Abstract: 215,494. Ward, G. H., and White, J. March 5, 1923. Sparking -plugs.-The mica-insulated central electrode is enclosed in a conical metal sleeve C which is seated within a similarly shaped bore in the casing. The terminals may consist of a bar E and ring P, or the earthed electrode M may be in one with the metal sleeve C. An annular notch into which the material of the insulation and the sleeve C may be pressed, may be formed in the central electrode The terminal nut R may be bored for only a part of its length so that its top may be struck without endangering the threads on the central electrode.
Patent GB-526028-A (GB)
Title: Improvements in or relating to the driving of accessories on aircraft
IPC: B64C11/44
Filed: 1939-02-25
Abstract: 526,028. Motor accessories. RUBBRA, A. A., and WEST, H. E. W. Feb. 25, 1939, No. 6321. [Class 4] [Also in Group XXVII] The starting motor of an aircraft is capable of being clutched to the main power unit or to an oil pump for actuating the mechanism of a variable pitch airscrew, the clutch being actuated by a solenoid which also operates the control switch of the motor. In one form an electric starting-motor 10 has a shaft 12 having a splined part 13 on which slides a sleeve formed with clutch members 14, 15. The sleeve is moved by a lever 23 to bring the member 14 into engagement with a clutch member 17 on the main motor 11, or alternatively, to bring the member 15 into engagement with another member 19 on a sleeve 18 geared to a hydraulic pump 22. The lever 23 is moved by the armature of a doublewound solenoid which also moves the starting switch of the motor 10.
Patent GB-584133-A (GB)
Title: Improvements in cellulose nitrate coating compositions
IPC: C09D101/18
Filed: 1944-04-05
Abstract: A surface coating composition comprises cellulose nitrate, a volatile solvent, finely-divided inorganic filler, and a small proportion of sulphonated castor oil.  Suitable fillers are granite dust, slate dust, metallic powder, metal oxides, carborundum dust and quartz dust.  In an example, 8 ounces of granite dust and 1/8 ounce of sulphonated castor oil are added to 3 1/2 ounces of cellulose nitrate in 5 fluid ounces of acetone.  Specifications 341,897 and 450,285 are referred to.
Patent GB-844038-A (GB)
Title: Self sealing container
IPC: B65D51/30
Filed: 1959-02-24
Abstract: 844,038. Drying air in confined spaces. HEPPENSTALL, C. W. Feb. 24, 1959, No. 6347/59. Class 34(1) [Also in Group XVII] A stopper for a container for deliquescent materials comprises an apertured screw cap 4, a valve seating 9 of 'conical shape for a ball valve 12 and a button of a hygroscopic material having an aperture therethrough and being held tightly between a projecting  flange 7 on the cap and a shoulder 11 on the valve seating. The button is grooved to allow pouring when the container is inverted and the ball may also be of a hygroscopic material.
Patent GB-497901-A (GB)
Title: Improvements in control devices for fluid-pressure operated apparatus
IPC: F16H61/02
Filed: 1938-03-01
Abstract: 497,901. Interconnected valves. TENNANT, W. J. (Maybach-Motorenbau Ges.) March 1, 1938, No. 6446. [Class 135] A control device for the conduit of a pneumatically-operated change-speed gear, clutch &c. comprises a control member 2, Fig. 1, slidably mounted in a housing 1 provided with a supply conduit 10 and an outlet conduit 11. The member 2 is formed with a collar 4 which is normally pressed against a seat 5 in the housing 1 by a spring 3, and it is provided with a longitudinal bore 6 and transverse bores 7, the bore 6 terminating in a seating face 13 adapted to be covered by a closing body 9 actuated by a rod 8. With the control member in the position shown the conduit 11 is open to atmosphere, but upon actuation of the rod 8 and movement of the body 9 to the left, the body will first abut against the seating face 13 and close the bore 6 of the control member and then move the latter, causing the collar 4 to be lifted off its seat 5 and permitting communication between the pressure or vacuum conduit 10 and the conduit 11 through the bores 7. A device with two outlet conduits 47, 48 controlled by two members 22, 32 and an interposed closing member 29 is shown in Fig. 2, the supply conduit 20 communicating with the conduit 48 through a conduit 44 and chamber 52, and the conduit 47 being open to the atmosphere through the bore 26 of the member 22 and an opening 49 in the housing 21 ; alternatively the conduits 20, 47 are in communication through a conduit 43 and chamber 51, the conduit 48 being open to atmosphere. Control members 2, Fig. 1, may also be used in this modification, with the conduits 47, 48 functioning as supply conduits, and separate delivery conduits being connected to chambers 45, 46 in the housing 21 ; similarly, a control member 22, Fig. 2, may be used in the first construction, the functions of the conduits 10, 11 being reversed.
Patent GB-491525-A (GB)
Title: Process for the manufacture of vat dyestuffs
IPC: C09B5/36
Filed: 1937-03-04
Abstract: Vat dyes are made by ringclosing 4-amino-1 - anilidoanthraquinone - 31 - halogen - 21-carboxylic acids or the esters or chlorides thereof or the corresponding 3-sulphonic acids, the 4-amino group being arolyated prior to or after the ring closure.  Ring-closure is effected by splitting off water from the acids, treating the acid chlorides with aluminium chloride or vatting the esters.  The aroylation is preferably carried out in a solvent such as nitrobenzene, and aroylating agents specified are the chlorides of benzoic acid, halogen or alkoxy benzoic acids, naphthoic acids and diphenyl carboxylic acids.  The products dye vegetable fibres blue shades fast to chlorine and boiling.  In examples: (1) 1-amino-4-benzoylaminoanthraquinone is condensed with 2-bromo-6-chlorobenzoic acid methyl ester in naphthalene in presence of copper and potassium acetates, and the 4-benzoylamino-1-anilidoanthraquinone - 31 - chloro - 21 - carboxylic acid methylester so obtained is vatted with sodium hydrosulphite to give the acridone; (2) 2-amino-6-chlorobenzoic acid is condensed with 1-bromo-4-aminoanthraquinone - 3 - sulphonic acid, the 4 - amino - 3-sulpho - 1 - anilidoanthraquinone - 31 - chloro-21 - carboxylic acid so obtained is ring-closed with sulphuric acid, splitting off the sulphonic group, and the acridone so obtained is aroylated with 4,6-dichlorbenzoyl chloride or any other carboxylic acid chloride; (3) 4-amino-3-sulpho-1 - anilidoanthraquinone - 31 - chloro - 21-carboxylic acid is vatted with sodium hydrosulphite, splitting off the sulphonic acid group, and ring-closed with chlorsulphonic acid, the product being then acylated as in example 2.
Patent GB-1418636-A (GB)
Title: Marine propulsion
IPC: B63B1/24
Filed: 1972-02-11
Abstract: 1418636 Marine propulsion units ROLLSROYCE (1971) Ltd 5 Feb 1973 [11 Feb 1972] 6474/72 Headings B7V and B7A A water jet propulsion unit for hydrofoils or hovercraft comprises a gas turbine driven impeller 22, the exhaust gases from the turbine being passed into water streams flowing through passages 32 in wings which extend from the propulsion unit. Exhaust gas ducts 31 have porous walls through which the exhaust gases are passed into the full width of the passages. The passages may have convergent-divergent exit portions, Figs. 3 and 4 (not shown), and nozzles for compressed air may be provided on the divergent portions so that the direction of the streams issuing from the passages can be varied. The turbine 20 is driven by gases from a combustion device 18 which is fed with fuel and compressed air through pipes contained in a hollow strut 12.
Patent GB-555078-A (GB)
Title: Improvements in multi-vibrator valve generating circuits
IPC: H03K3/08
Filed: 1942-05-13
Abstract: 555,078. Valve generating circuits. PRATLEY, H. W. Mav 13, 1942, No. 6504. [Class 40 (v)] A multi-vibrator comprises two valves having the anode of either coupled to the grid of the other and the grid of each connected to a point of fixed potential through a resistance RG<SP>1</SP>, RG" and the cathode of each connected through a resistance RK', RK<SP>11</SP> to said point of fixed potential and having a common resistance RC connected between high tension positive and the individual anode resistances RA<SP>1</SP>, RA<SP>11</SP>. In this way a square top wave form may be taken across either of the cathode resistances, which preferably have a value of not more than half of that of the individual anode resistances. The common anode resistance preferably has a value not less than double that of the individual anode resistances.
Patent GB-356130-A (GB)
Title: Improvements in and relating to radio signalling apparatus
IPC: H03D1/20
Filed: 1930-02-27
Abstract: 356,130. Valve detecting circuits. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Warner, J. C. ; 1431, Nott Street, Schenectady, New York, U.S.A.) Feb. 27, 1930, No. 6547. Convention date, March 8, 1929. Void [Published under Sect. 91 of the Acts]. [Class 40 (v).] The grid bias applied to an anode bend detector is varied in accordance with the impressed carrier wave whereby an increased output is obtainable before distortion due to grid current arises. The Figure shows an equipotential cathode valve 5 having a resistance 14 in the anode circuit the potential drop across which forms part of the grid bias. Condenser 15 forms a shunt for audiofrequencies and the relative values of the resistance 14 and the source 16 are determined by the valve characteristics, and in some cases source 16 may be dispensed with.
Patent GB-748209-A (GB)
Title: Hoist for depth charges
IPC: F41F5/04
Filed: 1952-03-14
Abstract: 748.209. Ammunition hoists. AKTIEBOLAGET BOFORS. March 14.1952 [Nov. 5, 1951], No. 6645/52.- Class 9(2) A hoist for depth charges for use with a launcher having tubes 9-12 any one of which can at a certain elevation form an extension of the hoist, comprises a sheft 13a, a lifting 'member 47, and at the lower end of the shaft a rotatable cylindrical magazine 15 which pro. trudes into the shaft and which has recesses 17. 20'tn receive the depth charges the member 47 being movable in each recess in turn and being so constructed that it can elevate and project into the tube forming the extensiun to the shaft. In the construction shown depth charges 26 are placed in the exposed recass of four recesses 17-20 of the cylindrical magazine 15 which is rotatable about a vertical axis. The base 21 of the body has openings 22 through which passes a plate 47 of the hoist. The plate forms part of a carriage which is guided by rails in the hoist shaft 13a and which is attached to two endless chains passing around upper and lower sets' of sprocket wheels 37. 40. When the chain is driven by a motor 29 the plate 47 lifts a depth charge from that recess which is disposed within the shaft, through an opening 13 in a foundation 1 and into one of the four launching tubes 9-12. These tubes are pivotally supported at 6 on a body 3 which is rotatable about a fixed base 2. The body 3 contains an electric motor and gearing. details of which are illustrated in Fig. 3 (not shown) for rotating the body shout the base and for pivoting the tubes abbut the axis 6 whereby each tube in turn can be brought into a vertical position in line with the opening 13.' These operations may alternatively be performed by handles through suitable gearing. Specification 748,210 is referred to.