baber/WOPTO huggingface dataset:
Patent GB-1459898-A (GB)
Title: Diaphragm for electrolytic production of caustic alkali
IPC: B32B7/02
Filed: 1974-05-29
Abstract: 1459898 Porous laminated electrolysis diaphragms KUREMA KAGAKU KOGYO KK 29 May 1974 [7 June 1973] 23890/74 Heading B5N [Also in Divisions C3 and C7] A diaphragm for electrolysis, e.g. of NaCl, to produce caustic alkali has an acid-resistant anode facing layer 0À01-0À3mm. thick with pores of 0À05-1À5Á mean diameter and an alkali-resistant cathode facing layer 1-6mm. thick with pores of 3-100Á mean diameter. Both layers may be of a fluorocarbon polymer e.g. PVdF; alternatively the anode layer may be chlorinated PVdC or PVC and the cathode layer of a polyolefin or ceramic. Suitable materials are listed. The layers may be made by kneading a soluble filler e.g. CaCO 3  or CaSO 3  with the plastics material and a plasticizer e.g. dimethyl phthalate or liquid paraffin, followed by pressing, rolling, stretching and leaching of the filler with an acid; the latter step may be effected before or after uniting the separate layers by heat and pressure. The layers may alternatively be bonded by adhesive. A comparative disclosure comprises a double polyethylene layer made as above whose anode-facing layer is 0À6mm. thick.
Patent GB-712281-A (GB)
Title: Improvements in or relating to superheterodyne receivers incorporating automatic frequency-stabilizing means
IPC: H03J7/00
Filed: 1952-09-24
Abstract: 712,281. Automatic frequency control systems. PHILIPS ELECTRICAL INDUSTRIES. Ltd, Sept. 24, 1952 [Sept. 27, 1951], No. 23959/52. Class 38(4) The local oscillator of a superheterodyne radio receiver, particularly one for the reception of a number of closely-spaced frequencies in the region of, say, 40-60 mc/s, is automatically stabilized for any one of these frequencies by mixing pulses derived from a stable source with the oscillator output to produce a beat which, through a frequency discriminator, provides a rough adjustment of the oscillator frequency. The beat is also fed to a phase discriminator comprising a further pulse-mixing stage, the output of which provides a control voltage for fine adjustment of the frequency of the oscillator. As shown, the receiver comprises a local oscillator 5 feeding a mixer 4 the output of which may if desired be further reduced in frequency by mixing at 8 with waves from a stable source 7. The reference standard is provided by a stable source 15 the frequency of which may be 100 kc/s. This source is coupled to frequency-multiplying stages 18, 19 to produce a wave of 1 mc/s for controlling a generator 20 of short pulses rich in harmonics, which are mixed in a normally cut-off mixing stage 21 with the output of the oscillator 5. If it is desired to tune the oscillator 5 to 26.8 mc/s, it is set approximately to this frequency by hand, and its output beats with the 25th harmonic of the pulse input to produce a beat at 1.8 mc/s. This beat is selected by a filter 22. tunable from 1.1 to 1.9 mc/s in steps of 100 kc/s, and is passed through an amplifier 23 to a frequency discriminator 24 tunable jointly with the filter 22. The output voltage is smoothed at 25 and is applied as a coarse adjustment to a frequency corrector 13 associated with the oscillator 5. To provide a fine adjustment, the reference source 15 controls a pulse generator 16 feeding a mixer 17 operating as a phase discriminator, the other input comprising the 1.8 mc/s selected by the filter 22. The output from the mixer 17, resulting from the inter-action of the 1.8 mc/s input with the 18th harmonic of the reference source 15, is integrated at 26 and fed through a. low-pass filter 27 to the frequency corrector' 13 to provide a precise adjustment of the oscillator 5. The pulse-producing and mixing stages 20, 21 and/or the similar stages 16, 17 may, comprise cathode-ray tubes somewhat as described in Specification 679,767. Specification 640,351 also is referred to.
Patent GB-1112048-A (GB)
Title: Improvements in or relating to fluid pressure operated drive and clutch systems
IPC: F16D25/063
Filed: 1965-06-04
Abstract: 1,112,048. Tractor driving arrangements. T. BUDZICH. 4 June, 1965 [8 June, 1964], No. 24055/65. Heading B7H. [Also in Division F2] In a tractor wherein an engine (12) drives the rear wheels (15) (Fig. 1, not shown) through a clutch (29) and change speed gear (16) and drives the front steerable wheels (17) through a hydrostatic transmission (24), (19), hydraulically operated clutches 47 are provided between the output motors (19) of the hydrostatic transmission and the wheels (17). The engaging pressure applied to the clutches 47 varies with the pressure in the hydrostatic transmission and is reduced when the clutch 29 is disengaged or when the gear (16) is in neutral. As shown the output shaft 30 of each motor 19 is fast with a pinion 31 meshing a toothed rim 34 which may be clutched to its hub 38 by the clutch 47. The rim 34 is clamped between a conical surface 35 of the hub 38 and a presser plate 41 by supplying pressure liquid through ducts 52, 51, 55, 47, 46 to a servo 45, the piston 43 of which is connected by rods 42 to the presser plate 41. A waved clutch disengaging spring 56 is provided. The hub 38 is splined to a shaft 58 carrying the wheel hub. The clutch, gears, motor 19 and wheel hub are mounted in a casing 18 pivotally connected at 20 to the front axle 14.
Patent GB-1106666-A (GB)
Title: Device for ejecting tobacco-leaf trimmings
IPC: F04C14/04
Filed: 1965-06-08
Abstract: 1,106,666. Cigar making machines. SERVICE D'EXPLOITATION INDUSTRIELLE DES TABACS ET DES ALLUMETTES. 8 June, 1965 [9 June, 1964], No. 24088/65. Heading A2C. Waste from leaves cut on the cutting die of a machine for cutting cigar wrappers is blown from the die by compressed air from a nozzle 3 into a shoot 4 to which suction  is continuously applied. Compressed air is supplied to the nozzle 3 by an electrically controlled valve 7 which also operates an hydraulic jack 9 for opening a cover 5 of the shoot 4 in synchronism with the blast from the nozzle 3. The control circuit for the valve 7 (Fig. 3, not shown) includes two switches in series in the supply line to the solenoid controlling the valve 7. One of these is a manually operated switch 12 which, when operated, actuates a relay which closes contacts to (a) hold itself energized and (b) by-pass the manual switch. The second switch is operated by a cam to energize the solenoid for the valve 7. The circuit is broken by a second cam operated switch in series with the manual switch 12.
Patent GB-203088-A (GB)
Title: Improvements in or relating to mould-board apparatus for concrete structures
IPC: E04G11/22
Filed: 1922-06-09
Abstract: 203,088. Kirton, R. G. June 9, 1922. Moulding walls in situ.-Shutters for use in moulding buildings in situ and of the type adapted to be raised course upon course, are guided by runways A<1> on spaced uprights A, and are separated from these runways during the moulding operation by wedges or blocks L, which are then removed to allow the shutters to swing clear of the cast wall. The shutters are raised by drums E having dividing flanges e and two cables passing in opposite directions over guide pulleys F loosely mounted on cross shafts. For use with uprights on one side only of the wall, cross bolts H and distance-pieces J<4> are employed to support the shutters and hold them from the uprights during the moulding. Shoots K may be fitted to the tops of the shutters.
Patent GB-308322-A (GB)
Title: Improvements in or relating to the manufacture of cellulose esters and to articles produced therefrom
IPC: C08B3/02
Filed: 1927-09-13
Abstract: 308,322. Dreyfus, H. Sept. 13, 1927. Yarns &c., treating with liquids. - Cellulosic textile materials such as cotton, viscose silli, and other regenerated cellulose materials, are subjected to the action of an organic acid such as formic or acetic acid, and then to the action of an acetylation or other esterification bath containing fatty acid anhydride, zinc chloride or other zinc halide, hydrochloric or other hydrohalide acid, and a diluent such as will prevent any change of form of the material being treated.
Patent GB-1527180-A (GB)
Title: Dredging apparatus
IPC: E02F3/90
Filed: 1977-06-09
Abstract: 1527180 Bucket ladder dredgers INDUSTRIEELE HANDELSCOMBINATIE HOLL- AND NV 9 June 1977 [10 June 1976] 24129/77 Heading E1F A swell compensator for the bucket ladder of a dredger as shown comprises a lever 6 pivoted at one end 7 to the pontoon 1 of the dredger, carrying at the other end the upper pulley block of the block and tackle system by which is supported the lower end of the bucket ladder, which at the upper end is pivotally supported at 3 from the pontoon, and acted upon between said ends by a spring unit 8, e.g. a hydro pneumatic or a pneumatic spring, so mounted between the lever and the pontoon that the upper and/or the lower end of the spring unit 8 is movable in the longitudinal plane of the lever to and from the pivot 7. Preferably the lower end of the spring unit is pivotally connected at 9 with the pontoon and the upper end 10 is movable along a curved guide 11 associated with the lever 7. With such a compensator changing the points of support of the spring unit on the lever and/or on the pontoon permits of easy adjustment of the compensator to the varying operating conditions of the bucket ladder due to variable operating depths of the ladder and variable loading of the buckets.
Patent GB-823675-A (GB)
Title: Friction article and method of producing same
IPC: F16D69/00
Filed: 1957-07-30
Abstract: 823,675. Making brake shoes. BENDIX AVIATION CORPORATION. July 30, 1957 [July 30, 1956], No. 24162/57. Addition to 784,340, [Group XXXIV]. Class 83 (2). [Also in Groups II and XXXIV] In a friction article for use on a brake shoe, a sintered metal matrix 12 in which are embedded particles of ceramic material is bonded to an arcuate metallic reinforcing member comprising a backing member 14 housed in a metal container 10; the backing member 14 having a plurality of openings 16 into which protrude portions of the matrix to effect an interlock between the matrix and the reinforcing member. The sintered metal matrix may be of a finely divided powdered mixture of suitable composition, for example: copper-16% to 85%, zinc and/or tin-1% to 41%, and silica- 3% to 30%. Several containers 10 may be spaced along the length of the brake shoe rim (not shown) and suitably secured thereto by riveting, welding, &c.
Patent GB-677812-A (GB)
Title: Improvements in or relating to arrangements of fuel tanks and auxiliary engines on bicycles
IPC: B62J35/00
Filed: 1949-09-20
Abstract: 677,812. Spray-carburetters. SOC. D'APPAREILS DE CONTROLE ET D'EQUIPMENT DES MOTEURS S.A.C.E.M. Sept. 30, 1949 [Dec. 22, 1948], No. 24189/49. Class 7(iii) [Also in Group XXXI] A fuel tank and auxiliary engine are arranged on a bicycle so that, when the bicycle is supported with the front wheel above the rear wheel, the filler opening of the tank is above the level of the fuel in the filled tank, and either the parts of the engine which are normally fed with fuel when the engine is running are above the level or, if such parts are below the level, the end at the tank of the feed pipe connecting the tank to the parts is above the level so that the fuel cannot escape. The invention is concerned with preventing fuel leakage when the bicycle is stored in a vertical position. As shown in Figs. 1 and la the the engine 3 is disposed below the carburetter which is disposed forwardly and below the fuel tank 4. fuel normally passing through a pipe 6 to the constant level chamber 5 of the carburetter and thence into the inlet manifold. The constant level chamber 5 is also connected to the fuel tank by a pipe 10, the end of which is disposed above the level N of the fuel in the filled tank when the bicycle is in its normal position. On the bicycle being arranged vertically for storing purposes the fuel takes the level N' in the tank and the fuel in the carburetter and pipes 6, 10 return by gravity to the tank 4, the filler opening 12 of which is so arranged to be above the level N<SP>1</SP>. In a modification, Fig. 2A, the carburetter is arranged behind and below the tank and the constant level chamber 5 is connected to the tank by the pipe 10 having an auxiliary chamber 9 so that on the level in the fuel tank becoming N' the chamber 9 is filled by gravity by fuel in the constant level chamber 5 and the pipes 6, 10. In a further modification, Fig. 3, and 3A, the fuel tank 4 is below the chamber 5 and fuel from the tank is pumped to the chamber 5 by a pump 7, fuel overflowing from the chamber 5 into the chamber 9 which is connected to atmosphere by a pipe 13. On the fuel in the tank taking the level N', the chamber 9 is filled with fuel from the chamber 5 and the pipes 6, 10.
Patent GB-886050-A (GB)
Title: Improvements in or relating to card-separating dividers used in office and like equipment
IPC: B42F17/02
Filed: 1958-07-28
Abstract: 886,050. Indexing; filing papers. EVE, J. H. S. July 24, 1959 [July 28, 1958], No. 24210/58. Classes 16 and 146(1)  A card separator comprises a plate 1 bent rearwardly at its upper edge to form a ledge 2 and an inverted channel member 3, 4, the latter accommodating a channel shaped window member 6, 7, having window slots or formed from transparent material, for the reception of a label between parts 4, 7. The inverted channel member 3, 4 is preferably formed integrally with the plate 1 as a metal pressing. Side flanges 14 on the plate 1 are secured to U-sectioned uprights 8, the upper ends of which blank off the ends of the channel member 3, 4 thereby preventing endwise displacement of the window member. One or both of the upper ends of the uprights 8 may be slidable or pivoted to facilitate removal or insertion of the window member. The ledge 2 may present a concave face to the bight of the window member on which the latter may seat.
Patent GB-1062872-A (GB)
Title: Vinyl chloride copolymers
Inventor: NIELD ERIC
IPC: C08F214/06
Filed: 1963-06-18
Abstract: Copolymers comprising 99 to 1 weight per cent of vinyl chloride units, 1 to 99 weight per cent of N-aryl maleimide units and 0 to 49 weight per cent of units derived from at least one other ethylenically unsaturated compound copolymerizable with both vinyl chloride and N-aryl maleimide, the amounts totalling 100 per cent, may be prepared by copolymerizing the monomers in the presence of a free radical initiator.  Many suitable maleimides are listed including phenyl, p-diphenyl, a -naphthyl, b -naphthyl, tolyl, chlorophenyl, bromophenyl, nitrophenyl, t. - butylphenyl 4 - benzylphenyl, 2- and 3-methoxyphenyl, 4-ethoxyphenyl, 4-phenoxyphenyl, 4 - cyanophenyl, 2,4 - dinitrophenyl, 2 - chloro - 4 - phenoxymethylphenyl, 2 - methyl - 4 - chlorophenyl, 2,4,5 - trichlorophenyl and 2,4,6-tribromophenyl maleimides. Many suitable comonomers are listed including styrene and substituted styrenes, vinyl and allyl esters, alkenyl alkyl ethers, acrylic and methacrylic esters and nitriles, dialkyl fumarates and maleates, maleic anhydride, butadiene, isoprene, divinyl benzene, glycol dimethacrylate and vinylidene chloride.  Polymerization may be effected in bulk, solution, e.g. in hydrocarbons, chlorinated hydrocarbons, alcohols, ethers or Ketones or aqueous dispersion in the presence of emulsifiers, e.g. alkyl sulphonates, polyethylene oxides and quaternary ammonium salts, or dispersing agents, e.g. methyl cellulose or hydrolysed polyvinylacetate. Specified initiators are azo compounds, acyl peroxides, hydrogen peroxide and ammonium persulphate.  The copolymers may be compounded with fillers, pigments, stabilizers, plasticizers, lubricants and mould release agents, and may be moulded, e.g. to form pipes and joints for hot water plumbing.  Examples describe the copolymerization of (1 to 7 and 22) vinyl chloride and N-phenyl maleimide; (9 and 10) vinyl chloride and N-orthochlorophenyl maleimide; (11) vinyl chloride and N-orthotolyl maleimide; (12) vinyl chloride and N-metamethoxy phenyl maleimide; (13) vinyl chloride, N-phenyl maleimide and styrene; (14) vinyl chloride, N-phenyl maleimide and acrylonitrile; (15) vinyl chloride, N-phenyl maleimide and vinyl ethyl ether; (16) vinyl chloride, N-phenyl maleimide and butadiene; (19) vinyl chloride, N-phenyl maleimide and a -methyl styrene; and (20) vinyl chloride and a -naphthyl maleimide in aqueous dispersion in the presence of hydrolysed polyvinyl acetate and lauroyl peroxide; of (8) vinyl chloride and N-phenyl maleimide in aqueous emulsion in the presence of an organic sulphonate and ammonium persulphate; and of vinyl chloride and N-phenyl maleimide in (17) methanol in the presence of lauroyl peroxide; (18) methanol in the presence of acetyl sulphonyl peroxide; and (21) benzene in the presence of acetyl sulphonyl peroxide. The copolymers may be stabilized with organic tin compounds or dibasic lead stearate.
Patent GB-533793-A (GB)
Title: An air raid protection device for roof and side glazing
IPC: E04D13/03
Filed: 1939-07-18
Abstract: 533,793. Window shutters. GUEST, KEEN & NETTLEFOLDS, Ltd., and OAKLEY, M.C. July 18, 1939, Nos. 24227 and 24228. Divided out of 531,399. [Class 20 (iii)] An air raid protection device for roof and side glazing, wherein the existing glazing is left undisturbed, is provided by securing to the glazing bars 12 additional seating bars 21 in which slide the edges 24 of panels 23 constructed as described in Specification 531,399. The glazing bars are secured to upper and lower purlins 10, 11 and have lead seatings 14 with packing 16 on which rests the glass 17, lead flanges 18 being bent down on to the glass. Screws 20 secure the additional seating bars 21 to the glazing bars. Each window has a fixed protective panel 26, and a sliding panel 23, the latter being connected in pairs by cords 27 running over pulleys 28, a group of pairs being connected to a master cord 29.
Patent GB-1106902-A (GB)
Title: Improvements in or relating to automatic balancing direct current potentiometers
IPC: G01K1/02
Filed: 1965-06-08
Abstract: 1,106,902. Potentiometric measuring systems. CONTINENTAL ELEKTROINDUSTRIE A.G. [trading as CONTINENTAL ELEKTROINDUSTRIE A.G. ASKANIA-WERKE]. June 8, 1965 [June 11, 1964], No.24227/65. Heading G1U. [Also in Division G3] An automatic balancing D.C. potentiometer includes a stabilized A.C. power supply (see Division G3), comprising a high frequency oscillator based on transistor 1 and having an output circuit through transformer 20, an adjustable reactive impedance, which may be a pair of variable capacitors 24, 25 arranged to vary in opposite senses so that their combined capacitance remains constant coupled across the supply, and a rectifier arrangement 28 connected to the reactive impedance to provide a unidirectional current. This current is fed to a fixed impedance 31, and the voltage across this impedance is compared in a chopper amplifier 33 with the unknown voltage to be measured, applied at the terminals 32. Any error voltage derived by this comparison is used to control a servomotor 35 which operates to adjust the impedance 24, 25 to a balance position, and to control the recording arrangements 37, 38.
Patent GB-669494-A (GB)
Title: Improvements in or relating to ice-making apparatus
IPC: F25C1/12
Filed: 1949-09-21
Abstract: 669,494. Ice-making. FLAKICE CORPORATION. Sept. 21, 1949 [Oct. 29, 1948], No. 24248/49. Class 29. In ice-making apparatus similar to that described in Specification 669,466, wherein ice is formed in square-section tubes 1 from water flowing down the tube walls, the ice then being harvested by heating the tubes to allow the ice columns to descend by gravity to cutters, the freezing process is stopped and the harvesting initiated by means responsive to the blocking of the now of-water down the tubes due to these tubes being blocked with ice. When the tubes 1 become blocked water builds up in the water header 3 and flows by siphons 89 into a pipe 91 the outflow from which flows into a pipe 95 in which is situated a thermostat bulb 97 actuating a switch 47. When the machine starts a switch 33 actuated by a thermostat 99 in contact with the tubes 1 is closed to operate a solenoid 41 the armature 29 of which contacts a contact 45 to supply current to the water circulating pump 39 and through switch 47 to a hold-in circuit for the'solenoid 41 the switch 33 being opened when the tubes 1 become cold. When the switch 47 is actuated, this hold-in circuit is broken so that armature 29 makes contact with' 43 to stop the pump 39 and supply current to a solenoid-operated valve 21 supplying compressed gas to thaw the tubes 1 and to the motor 37 driving the cutter. The thawing process causes the switch 33 to close preparatory to the start of a new freezing cycle. Specification 669,467 also is referred to.
Patent GB-588499-A (GB)
Title: Improvements in or relating to dough mixing machines
IPC: B01F9/00
Filed: 1946-01-04
Abstract: 588,499. Mixing-machines. MELVIN & GILLESPIE, Ltd., and HALL, W. A. Jan. 4, 1946, No. 24347/44. [Class 86] A dough-mixing machine comprises a rotatable bowl and two or more mixing arms carried by rotary shafts inclined to the vertical and offset at the same side of the axis of rotation of the bowl. Mixing arms 8, 8<SP>1</SP> are mounted within a rotatable mixing bowl 13<SP>1</SP> and are rotatable in bearings in a crosshead 9 supported in trunnions 10, 10<SP>1</SP> in side standards 11, 111. The driving shafts of the mixing arms 8, 8<SP>1</SP> carry bevel gears 7, 7<SP>1</SP>, respectively, in mesh with bevel gears 6, 6<SP>1</SP>, driven by a motor 1 through pinions 2<SP>1</SP>, 2<SP>2</SP>, 4, 4<SP>2</SP>, and pinions 2<SP>1</SP>, 2<SP>2</SP>, 4\ 4<SP>3</SP>, respectively. The mixing arms may have the same or an unequal inclination to the vertical and may be rotated at the same or at different speeds ; and the drive to the mixing arms may comprise a variable speed motor or a variable speed gear. The mixing bowl may be removed when the mixing arms are swung clear by the turning of the cross head 9 by means of a motor 12. The latter drives a worm wheel 13 through an overwinding clutch device which disconnects the drive if the motor 12 is not switched off when the arms 8, 81 have reached their maximum height. The bowl 13<SP>1</SP> is rotatable by gearing driven by the motor 1 or by independent means.
Patent GB-1379357-A (GB)
Title: Polybenzoxazoles
IPC: C08G73/22
Filed: 1973-05-22
Abstract: 1379357 Polybenzoxazoles FRANCE ARMED FORCES MINISTER OF 22 May 1973 [21 June 1972] 24481/73 Heading C3R A polybenzoxazole comprises units of formula and/or of formula where Y is a divalent atom or group, q is 0 or 1 and A is where a is 1 to 3, R<SP>1</SP> and R<SP>2</SP> are hydrogen, alkyl, -CF 3 , -Si(R<SP>3</SP>) 3 , adamantyl, phenyl alkoxy or -O-Si(R<SP>3</SP>) 3 , R<SP>3</SP> being phenyl or alkyl and Z is a divalent atom or group. The polybenzoxazoles are obtained by reacting a compound where X is a halogen atom or -OR were R is hydrogen or an esterifying group, with a bisorthohydroxyamine either in one stage or in two stages, the first being a polycondensation and the second an intramolecular cyclization brought about by heating. In examples 3,3<SP>1</SP>-dihydroxybenzidine, 3,3<SP>1</SP>-dihydroxyhenzidine dihydrochloride, 3,3<SP>1</SP>- diamino-4,4<SP>1</SP>-dihydroxy diphenyl sulphone, 3,3<SP>1</SP>-diamino-4,4<SP>1</SP>-dihydroxy diphenyl, 3,3<SP>1</SP>- diamino-4,4<SP>1</SP>-dihydroxy diphenyl ether, 3,31- diamino-4,41-dihydroxy benzophenone and 1,3-bis-(3-amino-4-hydroxyphenyl)-adamantane are reacted with 1-3-dimentyl-5,7-dicarboxy adamantane, 1,3-dicarboxy adamantane, 3-3<SP>1</SP>- dicarboxy diadamantane and 3,3<SP>1</SP>,5,5<SP>1</SP>-tetramethyl-7,71-dicarboxy diadamantane, and acid dichlorides and a diphenyl ester of some of these compounds; some of the reactions are carried out in one stage and some in two; in some instances polymers from the first stage are formed into films and then heated, with and without mechanical tension, to cause cyclization.