baber/WOPTO huggingface dataset:
Patent GB-783731-A (GB)
Title: Acceleration of polymerization
IPC: C08F4/32
Filed: 1955-07-28
Abstract: Polymers of esters of acrylic and/or methacrylic acids are made by polymerizing the monomer, admixed if desired with other monomers or a preformed polymer, in the presence of a catalyst combination comprising between 0.002 and 2 per cent of a diacyl peroxide, between 0.001 and 2 per cent of a tertiary amine having N-substituents selected from C1 to C-alkyl groups, C1 to C4 hydroxyalkyl groups, the benzyl group, and aryl groups having one or two aromatic groups, and in which there is at least one aromatic ring in the amine directly attached to the amine nitrogen atom or separated therefrom by not more than one carbon atom, and between 0.002 and 0.09 per cent of a thiophenolic compound.  The percentages are by weight of the monomeric material.  The polymerization may be effected in bulk, solution, suspension, or emulsion.  The preformed polymer may be formed in situ.  The esters are selected from acrylic or methacrylic acid with alkanols, halogenoalkanols, arylalkanols, halogenoaryl-alkanols, or cycloalkanols.  The ester radicals mentioned are benzyl, methyl to octadecyl, cyclohexyl, chlorobenzyl, and trichloroethyl.  The other monomer may be acrylonitrile, methacrylonitrile, acrylamide, N-methacrylamides, methacrylamide, vinyl acetate, glycidyl acrylate, glycidyl methacrylate, acrylic or methacrylic acid, or dimethyl itaconate. Specified peroxides are benzoyl, acetyl, butyryl, caproyl, lauroyl, dimethylbenzoyl, and 2,4-dichlorobenzoyl.  Amines mentioned are tribenzylamine, dimethylaniline, diethylaniline, dipropylaniline, dibutylaniline, N-methyl-N,N-diphenylamine, N,N - dimethylnaphthylamine, and p-nitroso-dimethyl aniline.  The phenol may be thiophenol, or a methyl or isobutyl substituted thiophenol, or mercaptonaphthalene. In solution polymerization the solvents may be naphtha, benzene, toluene, xylene, ethyl or butyl acetate, ethyl or isopropyl ethers, dioxane, or ketones. The polymers may be in the form of rods or sheets.
Patent GB-1460360-A (GB)
Title: Method of and n''aratus for the treatment of workpieces with liquid
IPC: B65G49/04
Filed: 1974-05-17
Abstract: 1460360 Etching apparatus ALLIED CHEMICAL CORP 17 May 1974 [21 May 1973] 21965/74 Heading B6J A liquid-application apparatus includes a controlled-temperature dip chamber, means for replenishing the contents of the dip chamber, a spray chamber and a conveyer which transfers workpieces from chamber to chamber and lowers them through the tops of the chambers according to a timed cycle. Semi-conductor wafers or other workpieces may be lowered sequentially into one or more dip tanks and at least one spray chamber by the conveyer, and be subjected as appropriate to cleaning, chemical polishing, etching, photoresist stripping, rinsing and drying operations using liquids. Silicon may be etched with (a) chromic and hydrofluoric acid, (b) nitric or acetic acid and hydrofluoric acid, (c) phosphoric acid, (d) potassium hydroxide and isopropyl alcohol. Germanium may be etched with hydrogen peroxide and hydrofluoric acid. Gallium arsenide may be etched with sodium hypochlorite or with hydrogen peroxide and sulphuric acid. SiO 2  may be etched with hydrofluoric acid, ammonium fluoride and water. Nickel may be etched with hydrogen peroxide and sulphuric acid. Silicon nitride may be etched with phosphoric acid, chromium with hydrochloric acid and iron oxide with hydrochloric acid.
Patent GB-428744-A (GB)
Title: Apparatus for the purification of water
IPC: C02F1/72
Filed: 1934-07-27
Abstract: 428,744. Purifying water; filters. SOC. D'ETUDE POUR L'EPURATION DES EAUX PROCEDES G. ET B., 136, Avenue des Champs-ElysÚes, Paris. July 27, 1934, No. 22024. Convention date, July 28, 1933. [Class 46] A filter bed of manganese dioxide or other oxidizing catalyst is confined by walls b with air-inlet apertures c and perforated air-supply tubes d extend through the interior of the bed. Imperforate semi-cylindrical shields are arranged over the tubes d to prevent the entry of water thereto. The apparatus shown comprises two filters a. The water passes to either filter from a trough m, being sprayed upon the filter either by a travelling distributer q, fed by a siphon p or by pipes n fitted with rotary spraying devices n<1> and atomizers n<2>. The filtrate from the beds a passes down sloping flows h and is further filtered through sand supported on plates j in a passage k. Samples for testing can be taken by means of a tube l.
Patent GB-1127782-A (GB)
Title: Improvements in or relating to aerosol generators
IPC: F16N7/34
Filed: 1965-09-06
Abstract: 1,127,782. Spray-producers. C. A. NORGREN CO. 6 Sept., 1965 [8 June, 1965], No. 22155/68. Divided out of 1127781. Heading B2F. [Also in Division Fl] An aerosol generator of the type disclosed in fig. 2 of the parent application is modified by the substitution in the cartridge insert 28 of a spring-loaded uni-directional valve member 158 in place of the annular bi-directional flexible valve member. When a high gas pressure is applied to an inlet 86A the member 158 is displaced downstream against the pressure of a spring 160 within stationary sleeve 156 so that a flange 158A is moved out of contact with a portion 82C of the liquid supply means 82 thus forming an annular passage for the flow of compressed air, the size of the passage depending on the pressure differential. The liquid is discharged radially outwards into the annular flow of gas through an annular outlet 29. In an alternative embodiment, fig. 4 (not shown )the liquid is discharged radially inwardly into the annular gas stream formed by a spring-loaded valve member (218) through a plurality of openings (220B) formed in the portion of a sleeve (220) having the smallest diameter. Spring means (230) is provided to enable the valve to operate in a bi-directional manner. A blast deflector (216) is located beneath the drip tube (214) and prevents a surge of back pressure &c. Fig. 2 (not shown) provides a further embodiment in which the valve &c. 158 of the embodiment of fig. 1 of the present application is replaced by a stationary sleeve (166) which presents a constriction for the flow of gas in the region in which the liquid is supplied radially to the gas stream.
Patent GB-239537-A (GB)
Title: Improvements in dental holders
IPC: A61C1/14
Filed: 1925-09-04
Abstract: 239,537. Chayes Dental Instrument Corporation, (Assignees of Chayes, H. E. S., and Jurgensen, A. P.). Sept. 4, 1924, [Convention date]. Dental engines.-A tool holder to be connected with and operated by a dental hand - piece comprises a tool-holding portion and a handle portion connected together by a joint permitting angular adjustment, and is fitted with a manually operated sliding jaw member for securing a tool in position by engagement with a groove in the tool shaft. The handle portion 10 of the tool holder is fitted to the tapering end of an ordinary hand-piece and encloses a shaft 29 which is gripped by the chuck of the hand-piece. The joint member 12 of the handle 10 is inclined to the axis of the handle and is provided with a pair of opposed radial lugs 13 which may engage one of several pairs of slots 14 formed in the face of a joint member 15 on the tool-holding portion 16 of the appliance. The parts are secured in adjusted angular position by a threaded sleeve 17. A shaft 18 mounted in the part 16 is connected to the shaft 29 by a universal joint 28 and terminates in a bevel pinion 19 meshing with a toothed flange 20 on a chuck or socket 21. The chuck 21 rotates in a bearing 22 in the gear casing and is supported at its lower end by a bearing sleeve 23 screwed into the casing. The shaft 25 of the tool 27 is formed with a flat surface 26 engaging a corresponding surface at the inner end of the chuck 21, and with a groove 32 adapted to be engaged by the forked end 31 of a latch 30 so as to secure the tool in position. The latch 30 is connected by a screw 36 to a knurled cover plate 35 sliding in grooves in the gear casing so that it may be drawn back to release the tool but is normally held in operative position by a spring 37. The end of the handle member 10 may have a slot 39 to pass over a screw 40 on the hand-piece to prevent rotation of the member 10 and may be transversely slit at 41 to provide a spring grip. The parts 10 and 15 may be formed of a light metal such as duralumin and the main bearing portions may be formed of stainless steel or bronze.
Patent GB-610807-A (GB)
Title: Improvements in or relating to power transmission or drive systems
IPC: F41A27/26
Filed: 1944-11-10
Abstract: 610,807. Aircraft gun mountings. STEEL PRODUCTS ENGINEERING CO. Nov. 10, 1944, No. 22176. Convention date, Nov. 13, 1943. [Class 92 (i)] [Also in Group XXIV] In a shaft coupling applied. to an aircraft gun turret fire-control mechanism to provide an amount of self-protective firing cut-off proportional to the speed of gun traverse, a driving shaft 10, Fig. 1, rotating with the gun turret, carries a coupling chamber 40 in which are disposed vanes 45, Fig. 5, on a driven shaft 12 connected to the fire control mechanism.. The chamber 40 is divided into two operative compartments by stop members 55. With the shaft 10 stationary, the vanes are disposed centrally in the compartments under the action of a spring 62, Fig. 4, mounted on the chamber cover 41 so as to revolve with the driving shaft and having a tongued member 67 keyed to the driven shaft inserted between its free ends so that relative rotation in either direction between the shafts is resisted. Upon rotation of the coupling, a gear pump 17, 19 driven by the shaft 10 delivers oil to the compartments through passages 25, 27, Fig. 2, and an annulus 31 in the casing 15, passages 34, 35, Fig. 6, in the shaft 10 and passages 47, 48, Fig. 9, in the vane body 46, and exhausts it therefrom through passages 49, 50 in the vane body, passages 36, 37 in the shaft 10 and an annulus 32 and passages 28, 26 in the casing. The differential pressure thus set up on the opposite sides of the vanes causes them to rotate relative to the chamber and take up a position therein determined by the rate of escape of the oil round the vanes and by the restoring force of the spring 62. The stops 55 serve to limit the movement of the vanes, which are so arranged that the leakage round them at full deflection is sufficient to prevent the development of excess pressure in the system. The chamber 40 operates in an oil bath, replenished through a filler plug 72. If desired, only a single vane may be utilized and one of the stops dispensed with to provide a phase change up to approximately a full turn of the vane. As described, the phase of the driven shaft is always advanced relative to that of the driving shaft, but it may be retarded by reversal of the fluid connections from the pump. The coupling units may be duplicated, one being related to the motion of the gun in elevation and the other to its motion in azimuth.
Patent GB-149615-A (GB)
Title: Improvements in roll film dark slides
IPC: G03B19/04
Filed: 1920-07-26
Abstract: 149,615. Zeiss, C. [Firm of]. July 26, 1919, [Convention date]. Measuring.-In a roll-film dark-slide, the rotation of the receiving-spool is gradually decreased and that of the supply spool gradually increased as the films are taken by means of frictional speed gear which is automatically varied so that a definite length of film is supplied by a definite angle of rotation of the actuating shaft for the changing device. The receiving-spool c is wound by a friction disk slidably mounted on a shaft f rotated from a winding-shaft d by bevel-gearing g. The supply spool is similarly driven through gearing i and the friction disk o. The position of the friction disks on the faces of the spools may be controlled by a slow worm gear or by rollers p on arms m which are kept in contact with the film wound on the spools and the movement of the friction disks on the shafts f, h is obtained by the slotted arms k. The film passes over a spring-controlled roller q which keeps the film taut. Specifications 15083/01, [Class 97, Philosophical instruments], and 13471/04 are referred to.
Patent GB-516210-A (GB)
Title: Improvements in and relating to kilns
IPC: F27D99/00
Filed: 1938-07-26
Abstract: 516,210. Stoking annular brick kilns. BIRO, Z., and MOLDOVANYI, I. July 26, 1938, No. 22213. [Classes 51 (i) and 51 (ii)] In a system of heating annular kilns the fuel is preheated, dried, and partly gasified in portable containers placed in or on the charging openings of the kilns, gases evolved together with any loose grains of fuel permitted to be drawn into the kiln by the draught thereof, and the fuel introduced into the kiln in a manner preventing entrance of air. Fig. 4 shows one form of container comprising a depressible spring mounted central tube n having grates o and openings n<1> at its base and an adjustable ring v limiting its projecjection into the kiln. Removal of a stopper t from the top permits inspection of the kiln and the admission of secondary air of combustion. A rod <3> threadedly engaging and rotatable within the end of an arm y on the tube n and having a base z<1> secured within and abutting a bow-shaped channel w limits the depressibility of the tube and permits spacing of the grates o from the foot of the tube. Alternatively the container may comprise an eccentric hand rotatable perforated disc mounted just beneath an opening in ledges within the container..
Patent GB-727218-A (GB)
Title: Improvements in slag-tap furnaces for tubulous vapour generators
IPC: F23C3/00
Filed: 1953-08-12
Abstract: 727,218. Pulverulent-fuel furnaces. BABCOCK & WILCOX, Ltd. Aug. 12, 1953 [Aug. 13, 1952], No. 22226/53. Class 51 (1). A slag-tap steam-generator furnace comprises a cylindrical furnace chamber 1 disposed with its axis horizontal and having a gas-outlet throat 20 leading to a radiation chamber 2, together with fuel firing means which discharge downwardly into the furnace chamber through the upper roof-like part thereof at an angle to the horizontal of approximately 45 degrees. The fuel-firing means comprise pulverized fuel burners 4, 5, with which are associated secondaryair nozzles 6, 9. In a modification the burners and secondary-air nozzles are replaced by cyclone furnaces and the radiation chamber is corner-fired by pulverulent-fuel burners.
Patent GB-1174007-A (GB)
Title: Improvements in or relating to apparatus for Spreading Manure and like Substances
Inventor: HARRIES GWYNFOR MAPLE
IPC: A01C3/06
Filed: 1967-05-13
Abstract: 1,174,007. Manure spreaders. G. M. HARRIES. 9 Aug., 1968 [13 May, 1967], No. 22285/67. Heading AID. Apparatus for spreading manure and the like comprises a receptacle which is tiltable at 13 to assist impellers 48 in discharging the contents. The receptacle has end walls 15, (16) joined by a front wall 17, 18 and a back plate 21..Sections 19, 20 from a real wall pivoted at 33 to links 30 and free to' slide via pins 35 engaging in guide slots provided by brackets 36. The bottom wall element may be connected to the movable rear wall. The apparatus is connectable to a tractor and utilizes its power and hydraulic systems.
Patent GB-762667-A (GB)
Title: A wedge for use in connections for girders for supporting mine roofs
IPC: E21D17/086
Filed: 1953-08-13
Abstract: 762,667. Wedges; cotters. VANWERSCH, A. Aug. 13,1953 [Aug. 13, 1953], No. 22370/53. Class 89 (2). [Also in Group X] A wedge or cotter 1, Fig. 6, for securing girders together, is held in position by an enlargement 13 on a coiled spring 12 secured to the wedge by engaging a hole 15 therein. The spring must be removed to allow the cotter to be withdrawn. In a modification the cotter 1, Figs. 1 and 2, is held by a sleeve 2 locked to it by a wedge 3, and in a further form a pad is secured to the cotter by a bolt and nut. In other forms, a split clip, held by a bolt and nut, engages slots in the sides of the cotter, or a split spring-ring is passed through a hole in the end of the cotter.
Patent GB-1066527-A (GB)
Title: Photographic wide-angle and semi-wide-angle objective of extremely high light-gathering power
IPC: G02B13/04
Filed: 1964-05-29
Abstract: 1,066,527. Photographic objectives. CARL-ZEISS-STIFTUNG, [trading as CARL ZEISS]. May 29, 1964 [May 31, 1963], No.22423/64. Heading G2J. An objective of focal length f having a back focus greater than 0À8f, a relative aperture of at least 1:2À4 with an angular field of at least Œ25‹, and an overall length not greater than 3f, comprises a front portion consisting of one, or, as shown, two negative meniscus lenses LI LII spaced a distance d4, which is at least 0À1f, in front of a main portion of positive power consisting of six members wherein LIII, LIV, constitute a positive group, LIV, being a meniscus concave to the image and having not more than 0À4 times the refractive power of LIII, LV is the member of highest negative refractive power in the whole objective and consists of a biconcave lens having the negative refractive power of surface r9 at least one quarter of that of the whole lens, and LVI LVII, LVIII, LIX form a positive group wherein LVI LVII is a meniscus convex to the image. Preferably d10 < 0À25F AND 0À2F< D5 <0À8f. Optical data are provided for six examples.
Patent GB-1516135-A (GB)
Title: Mineral jigs
IPC: B03B5/18
Filed: 1975-05-23
Abstract: 1516135 Jigs; centrifugal separators D J CROSS 21 May 1976 [23 May 1975] 22505/75 Headings B2H and B2P A jig for concentrating minerals has a dished rotor 14 mounted for rotation about a vertical axis 18 and provided with a screen 16. A bottom portion 3 of the jig is oscillated vertically by means of a drive (21) to cause the water in the jig to pulsate, the said drive (21) comprising a pair of bars (22) releasably secured intermediate their ends to a pivotally mounted bracket (23) and driven by a crank rod (28) eccentrically coupled to a wheel (28), Figs. 3 and 4 (not shown). In use, a slurry containing the mineral to be separated is supplied to a bed of haematite contained in baskets 17 on the rotating wire mesh screen 16. The heavy mineral passes through the screen and is removed through a nozzle 11. The lighter minerals move up the rotor and spill over the edge thereof into a trough 8.
Patent GB-1475125-A (GB)
Title: Immunological detection
IPC: A61L2/26
Filed: 1974-05-21
Abstract: 1475125 Immunological detection of a protein GENERAL ELECTRIC CO 21 May 1974 [15 Aug 1973] 22662/74 Heading G1B A method for immunological detection of a protein comprises contacting with a fluid suspected of containing the protein a slide having adsorbed on it a monomolecular layer of a first protein immunologically reactive with a second protein, the second protein being the protein to be detected, then contacting the slide with a solution of a third protein immunologically reactive with the protein to be detected, then examining the slide, the formation of a trimolecular layer on the slide indicating the presence of the protein being tested for. The contacting process may be repeated using a plurality of antibody solutions, each solution containing antibody to the antibody of the next preceding solution. The slide may be examined by one of the methods described in 1443181. There is reference to determination of rabbit antiserum to bovine serum albumin, of human antibodies to hepatitis associated antigen and of hepatitis associated antigen.
Patent GB-410462-A (GB)
Title: Improvements in or relating to the production of hypochlorite of calcium colutions
IPC: C01B11/06
Filed: 1932-08-12
Abstract: <PICT:0410462/III/1> Bleaching powder is dissolved in water, and the suspension containing basic calcium hypochlorite compounds is chlorinated until the alkalinity occasioned by the lime is still just detectable.  In a continuously operated process, bleaching powder suspension is circulated by pump 4 from container 1 downwards through coil 2, gaseous or liquid chlorine from container 10 being introduced through valve 13.  Fresh bleaching powder suspension is continuously pumped from tank 14 into container 1, the finished liquor being discharged through pipe 20.  The pump 4 may be disposed between the upper end of the coil 2 and the container 1. For discontinuous working, the tank 14 is omitted.
Patent GB-1434993-A (GB)
Title: Furnace and generation of heat therein by oxidising a carbon aceous fuel
IPC: F22B31/00
Filed: 1973-05-11
Abstract: 1434993 Burning fluent fuel ENGELHARD MINERALS & CHEMICALS CORP 11 May 1973 [12 May 1972] 22672/73 Heading F4B The effluent from partially burning a liquid or gaseous hydrocarbon fuel with less than the stoichiometric amount of oxygen is mixed with the effluent from passing the same or a different liquid or gaseous hydrocarbon fuel over an oxidation catalyst with more than the stoichiometric amount of oxygen and combustion is completed. In a steam generator furnace, Fig. 1A, liquid fuel is fed to the lower part of the furnace with less than the stoichiometric amount of air. Gaseous fuel is fed to catalytic oxidation devices 60 with more than the stoichiometric amount of oxygen, and the gaseous products fed into the upper part of the furnace where the combustion is completed. The fuel and/or air may be fed to the furnace tangentially. Inert gas, such as recycled flue gases, is fed to furnace at 44, and a mixture of inert gas and air is fed to the furnace at 66. The exhaust gases contain little noxious gas, and the temperatures are maintained below that at which large amounts of oxides of nitrogen are formed. The fuels may be an aliphatic hydrocarbon, naphtha, kerosene, mineral oil, carbon monoxide or an alkanol. The catalyst is preferably platinum, finely dispersed on a ceramic carrier.
Patent GB-222650-A (GB)
Title: Trap nests for poultry
IPC: A01K31/16
Filed: 1923-09-10
Abstract: 222,650. Bell, A., and Young, S. L. Sept. 10, 1923. Trap nests. - A trap nest has a sliding door a that is supported in the open position by the weight of a flap d acting through a link c, the flap projecting inwardly over the nest at an angle when set as shown in Fig. 3. The link c passes through a slot g<2> formed behind a cleat g, the " set " position of the flap d being variable by means of an eccentric disc h that forms the end of the slot g<2>. When the flap is lifted by a hen the door drops, and, on being released again, the flap hangs vertically and the hook j<1> thereon passes through an aperture i<2> and locks the nest. On lifting the door the link c moves upwards in the slot q<2> and engages the end j of the hook j<1> which is thus released and the flap is then raised to the " set " position. If the door a is held up and the flap d raised further, the end d<1> passes beneath the projection a<1> and the link c enters the notch g', the door being then held permanently open.
Patent GB-908829-A (GB)
Title: Transistor blocking oscillator arrangements
IPC: H03K3/45
Filed: 1961-06-23
Abstract: 908,829. Transistor blocking oscillator circuits. KIENZLE APPARATE G.m.b.H. June 23, 1961 [July 16, 1960], No. 22848/61. Class 40 (6). To reduce the reverse base emitter voltage of the transistor of a transistor blocking oscillator, a diode D1 is connected between the base and a supply terminal so as to be conductive for reverse voltages and a resistance R2 is connected in series with the base circuit, the resistance being shunted by a rectifier D2 which has a low resistance for the forward direction of base current. In the circuit shown, triggering is effected at E and output pulses are taken from A. The back E.M.F. across the primary transformer winding K1 is absorbed by a rectifiercapacitor circuit D3, C2, the capacitor being shunted by a resistor which discharges the capacitor between successive operations of the circuit.