baber/WOPTO huggingface dataset:
Patent GB-1460232-A (GB)
Title: Dc-ac invertor for supplying a discharge lamp
IPC: H02M7/537
Filed: 1975-06-20
Abstract: 1460232 Supply systems for fluorescent lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 20 June 1975 [3 July 1974] 26330/75 Heading H2H [Also in Division H3] A D.C. to A.C. inverter operating in the blocking oscillator mode and used for supplying a fluorescent lamp is provided with means to inhibit the operation of the inverter whenever the lamp fails to ignite thus preventing high voltages being generated by the inverter. Closure of a switch 2 causes a capacitor 8 to charge from a D.C. source 1 over a resistor 7. After a time a diac 9 breaks down and the capacitor 8 discharges over the base-emitter junction of a transistor 10 whereupon the transistor 10 and the transformer 13 function as a blocking oscillator to produce an output from the secondary winding 17 of the transformer 13 to operate a fluorescent lamp 19. Should the lamp 19 fail to ignite the voltage at the collector of the transistor 10 rises, this voltage being applied over a Zener diode 29 to the base of a transistor 24 forming part of a bi-stable circuit which also includes a transistor 23. The rise in voltage at the base of transistor 24 causes this transistor to turn off so that transistor 23 turns on. An auxiliary transistor 34 then turns on to short circuit the base-emitter path of the transistor 10 thereby terminating the oscillation of the inverter. To restart the inverter the switch 2 must be opened and closed.
Patent GB-988389-A (GB)
Title: New process for the polymerisation of epoxides
IPC: C08G65/26
Filed: 1962-07-09
Abstract: Tantalum penta (2-chloroethoxide) is prepared by reacting TaCl5 in methylcyclohexane solution at 10-20 DEG  C. under nitrogen with excess ethylene oxide.ALSO:Polyalkylene oxides are prepared by polymerizing epoxides using as catalyst an alcoholate or phenolate of tantalum having the general formula Cln- 1Ta(OR)6- n where n is 1 to 5 and OR is alkoxy or aryloxy which may be substituted by halogen. Suitable monhydric compounds from which the alkoxy or aryloxy groups may be derived are (1) aliphatic primary, secondary and tertiary C1 to C18 monoalcohols which may be saturated or unsaturated, including C5 to C10 cycloaliphatic alcohols and alkylaryl alcohols having 7 or 8 carbon atoms and (2) monophenols having 6 to 10 carbon atoms. Many examples are given, e.g. methanol, isopropanol, cyclohexanol and phenol. 0.01% to 20% by weight of catalyst based on the epoxide used is added to the reaction mixture or formed immediately before or at the beginning of the polymerization by reaction of a tantalum halide with an alkylene oxide, alkali alkoxide or alkali phenoxide.  Mixed tantalum alcoholates-phenolates may also be used.  Epoxides used have the general formula <FORM:0988389/C3/1> wherein R1 and R2 are hydrogen or a saturated C1 to C12 hydrocarbon residue which may be halogen substituted or R1 and R2 together with the expoxy carbon atoms represent a saturated cycloaliphatic C5 to C10 hydrocarbon residue or either R1 or R2 is a phenyl group and the other hydrogen. Specified epoxides are ethylene and propylene epoxides, epichlorohydrin, 1:2-epoxybutane, 2:3 - epoxybutane, 1:2 - epoxyhexane, 2:3-epoxyheptane, 1:2-epoxydodecane, syrene oxide, cyclopentene oxide, cyclohexene oxide and dicyclopentene monoxide and mixtures of ethylene and propylene oxides.  Products of molecular weight 200-100,000 are produced.  In a modification the alcoholate or phenolate is used as solution in liquid ethylene oxide at below 10.8 DEG  C. at atmospheric pressure or at 10.8 DEG  to 150 DEG  C. under autogenous pressures In addition a solvent having a boiling point above 30 DEG  C. may be used at temperatures below 30 DEG  C.  In another modification ethylene oxide may be injected into a solution or suspension of the alcoholate or phenolate in an inert solvent at 0 DEG  to 150 DEG  C.  Specified solvents are benzene, xylene, methyl cyclohexane, aliphatic hydrocarbons and mixtures thereof, e.g. Shellsol T, chlorinated aliphatic hydrocarbons, ether and dioxane. Examples describe the polymerization of ethylene oxide, cyclohexene oxide, propylene oxide, styrene oxide and the copolymerization of ethylene and propylene oxides.
Patent GB-894445-A (GB)
Title: Improvements in or relating to fastener-supplying mechanisms
IPC: A43D71/00
Filed: 1957-08-21
Abstract: 894,445. Fastener supplying mechanisms. BRITISH UNITED SHOE MACHINERY CO. Ltd., and PRATT, J. W. Aug. 20, 1958 [Aug. 21, 1957], No. 26351/57. Class 89(3) A fastener-supplying mechanism suitable for a fastener-inserting mechanism for shoe manufacture which may be of the kind disclosed in Specification 643,632, comprises a raceway 13, Fig. 2, along which pointed and headed fasteners are arranged to pass in a row, a separator 15 mounted for movement across the outlet end portion of the raceway to separate the endmost fastener from said row and a shutter 2223 pivotally mounted adjacent the outlet end portion of the raceway and movable into the position shown in Fig. 3 in which it closes the outlet end of the raceway 13, the arrangement being such that movement of the shutter 2223 is effected by continued movement of the separator 15 after it has separated the endmost fastener from said row of fasteners in order to prevent jamming of the fastener due to its point swinging back into the raceway. In the exemplified embodiment the separator 15 carries an arm 306 from which depends a pin 307 which engages a face 308 on the shutter which is thereby swung about a pin 300 as the separator 15 continues to move after it has just separated the endmost tack from the row in the raceway.
Patent GB-225985-A (GB)
Title: Outlet box construction
IPC: H02G3/08
Filed: 1923-10-23
Abstract: 225,985. Clements, N. T. Oct. 23, 1923. Lathing.-An electric outlet box adapted to be secured against the side of a stud and having means for supporting laths comprises a body-plate forming two walls 10, 11 of which one 10 is at the mounting side, and a second plate bent to form three walls in contact with the other two, thus completing a box having one side open. The first plate has integral flanges 15 at the mounting side and a portion 17 of each may be bent to engage the face of the stud. A lath rest is secured to the outer side wall of the box. This may be of wood 19, as in Fig. 3, or may be a metal lath fastening and rest 20 formed of a single blank 24 having teeth 21 on one edge to be forced into the end of a lath. The blank is bent on parallel longitudinal lines 23 spaced apart less than the thickness of a lath and nearer the toothed edge than the plain edge and is then secured to the box so that one end of a lath applied to the teeth is secured firmly in relation to the box when the other end is nailed to the studding.
Patent GB-1461776-A (GB)
Title: Fans
IPC: F04D17/16
Filed: 1973-06-04
Abstract: 1461776 Centrifugal fans BRITISH GAS CORP 2 Sept 1974 [4 June 1973] 26473/73 Heading F1C A centrifugal fan comprises a series of frustoconical or, as shown, flat impeller discs 1 having openings at or spaced outwardly from their centres and mounted on a rotatable carrier 3, and a casing 6 having an inlet 9 for admitting air to the openings and an outlet 7, the width of the spaces between adjacent discs and the rotational speed being such that the flow through the spaces is laminar. The openings 15 in the discs may be segmental, as shown, or circular. The openings 15 and a fastening disc 14 may be omitted, annular spacers 13 then being replaced by spacer washers around fixing bolts, and the air then entering the spaces between the discs at the inner periphery of the discs. The width of each space is between 0À25 and 2 mm, preferably 0.5 to 1 mm, the impeller speed being 3,000 rev./min. The casing 6 is of volute form giving a degree of diffusion just sufficient to offset the loss of pressure due to friction in the volute.
Patent GB-844015-A (GB)
Title: Improvements in or relating to gas valves for use with gas fired water heaters whichgas valves are controlled by water temperatures
Inventor: CHAPMAN FREDERICK WALTER
IPC: F16K31/68
Filed: 1956-01-04
Abstract: 844,015. Thermally-actuated valves. MAIN WATER HEATERS Ltd. Jan. 4, 1957 [Jan. 4, 1956], No. 26672/58. Divided out of 825,746. Class 135. A gas valve for a gas-fired water heater, of the kind actuated by a thermal bellows filled with vapour or vaporizable liquid and responsive to changes of water temperature, comprises a single metal bellows 50 arranged in a compartment 51 separate from the water heater through which compartment heated water from the heater is arranged to flow, the compartment being formed with or having secured thereto a a gas valve casing 54 containing a closure member 55 having a stem or push-rod 56 which extends through a gland in a wall between the valve casing and the compartment containing the metal bellows, and a spring 70 associated with the closure member so as to urge it away from a valve seat and maintain the stem or push rod in abutting relationship with the end wall of the bellows.
Patent GB-1155372-A (GB)
Title: Improvements in or relating to Laser Devices
IPC: B23K26/06
Filed: 1966-06-16
Abstract: 1,155,372. Lasers. AMERICAN OPTICAL CO. 16 June, 1966 [16 July, 1965], No. 26852/66. Heading H1C. A laser device includes at least one fibre optical laser active component having a pumped region and a flexible unpumped region through which the output energy is directed. A plurality of bifilarly arranged laser fibres 14, preferably of glass, pass through a chamber 30, through which water may be circulated, and which is adjacent to a flash tube 16 for pumping the laser fibres. The looped ends 14c of the fibres lie outside one end of the chamber and the free ends pass through the other end of the chamber and through a flexible tube 20 to a probe for directing the laser output into a body cavity, for example. The pumped regions of the laser fibres and the flash tube may be contained in an elliptical housing 10 having a reflective inner surface 39. In modified arrangements the laser fibres surround the flash tube. Thus, in Fig. 3 (not shown), a plurality of parallel fibres are helically wound along the length of the flash tube and at the far end are looped back parallel to the flash tube. Both ends of the fibres and then bundled together in a flexible tube as before. In a second arrangement bifilarly arranged fibres are helically wound along the flash tube and in a final embodiment (Fig. 5, not shown) the fibres extend generally longitudinally of the flash tube but are looped backwards and forwards to progress completely around the circumference of the flash tube. The device may be used to treat or destroy body tissues.
Patent GB-1085667-A (GB)
Title: Axial-stress limiting device for a screw and nut gearing system
Inventor: GAZAL CHARLES
IPC: F16K31/44
Filed: 1965-06-24
Abstract: 1,085,667. Screw-and-nut gearing; locking rotary elements; valves. COMMISSARIAT A L'ENERGIE ATOMIQUE. June 24, 1965 [July 1, 1964], No. 26905/65. Headings F2E, F2Q and F2V. A device for axially moving a spindle 1 of a valve, comprises a nut 2 secured to a shaft 34. Nut 2 is disposed in a housing 4 so that it can move axially. A stack of spring washers 12 is disposed between a shoulder 8 on the nut 2 and a thrust bearing 14 engaged in a recess in the housing 4. Upon the spindle 1 reaching a lower limiting position, nut 2 will be forced upwardly once the loading of the washers 12 is exceeded to cause serrations 26 to engage serrations 24 on a threaded member 22. Member 22 has an oppositely handed and coarser thread nut than nut 20 so that, as it is rotated by the nut, it locks the nut to prevent further rotation. Rotation of the member 22 is limited by lugs 28 which move in recesses in a flange 18.
Patent GB-393817-A (GB)
Title: Improvements in and relating to diesel engines
IPC: F02B21/00
Filed: 1932-09-28
Abstract: 393,817. Oil engines. LANG, F., 41, Laimerstrasse, Munich, Germany. Sept. 28, 1932, No. 26950. [Class 7 (iii).] In a Diesel engine in which a combustion chamber c has pockets facing each other across the chamber so that gaseous jets issuing from the pockets impinge upon each other, the combustion chamber is so shaped that the jets split on impact and are each divided into two laterally deflected parts to produce rotary turbulence. A fuel sprayer g may be disposed centrally in the cylinder head, or sprayers may be mounted in the pockets themselves. The socket / of the centrally disposed sprayer may be shaped so as to act as a deflector.
Patent GB-1473960-A (GB)
Title: Sample conveyors
IPC: B01L9/06
Filed: 1975-06-25
Abstract: 1473960 Conveyers for sample carriers INTERTECHNIQUE 25 June 1975 [5 July 1974] 26967/75 Heading B8A [Also in Division G1] A sample conveyer comprises a plurality of cassettes 12 each provided with sample receiving locations 13 distributed regularly in the cassette and each having mechanical means 20 (Fig. 2) for supporting a sample at each location, means for moving the cassettes consecutively and stepwise along a closed path for sequentially bringing the locations opposite to a transfer station 58 and means at the transfer station for forcibly opening the mechanical means associated with the sample receiving location actually at the transfer station so that a sample at this sample receiving location can be moved out of the cassette. In the embodiment shown in the drawings, the cassettes 12 each in a cassette carrier 10 are advanced along slide ways 40 by means of pushers 41, 42, the first cassette carrier of each body of cassette carriers being moved to the back of the other body by engagement of projecting pins on endless belts 43, 44 with slots 30 in the lateral walls of the carriers. The sample containers 13 are each supported by projecting lips 20 which are movable outwardly at transfer station 58 by fingers 22 to allow the sample container to rest on platform 14 for measurement on the sample in conditions controlled by a programme plug (35) carried by the cassette. Fingers 22 are moved by a toggle 53 connected by flexible web or wire 52 to a lever 51 itself carried on a roller moving in a groove 50 on cam 48, the cam being rotated by motor 47. The motor is energized except when cam notch 54 passes switches 55, 56. Movement of platform 14 is controlled by lever 57 through a known linkage, lever 57 being pivotally connected with a disc 49 carried on the shaft of motor 47.
Patent GB-242297-A (GB)
Title: Wooden mosaic work
IPC: B44C3/12
Filed: 1925-10-28
Abstract: 242,297. Noel, E. A. Oct. 28, 1924, [Convention date]. Mosaics; continuous flooring; wood-block flooring.- Mosaic floor and wall coverings are wormed by embedding wooden tesserae, grooved on the underside, in a plastic magnesite cement 6 which may be coloured and the wearing resistance of which may be the same as the tesserae. The mosaic floor covering may be extended as a plinth over the adjacent walls. Other tesserae such as hardware, glass, enamel, gold, and silver cubes may be added for relief. The tesserae mav be first stuck on paper, which is then inverted to lay them and the paper is washed off. Linseed oil mav be afterwards applied to the surface. Wooden wedges or plugs may be sealed in the covering for the attachment of fillets or mouldings. The foundation may be wood, concrete, or cement and cork. Nails 9 may be driven into a wooden foundation to key the cement layer. Panels for wall linings, wainscotting, or furniture may be produced by cementing the tesserae to bases which may first be veneered. Ornamental materials such as motherof-pearl and precious metals and stones may be included with the tesserae.
Patent GB-534860-A (GB)
Title: Improvements in or relating to rotary chamber machines for drying, washing and other treatment of textile materials
IPC: D06F43/02
Filed: 1939-10-04
Abstract: 534,860. Washing and drying machines. CHERRY TREE MACHINE CO., Ltd., and DOWELL, G. Oct. 4 1939. No. 27163. [Class 138 (ii)] [Also in Groups III and XIII] A machine for washing, dry cleaning, drying and opening out textile material comprises a perforated cage 11 provided with inclined or helical internal lifters 18 and mounted within a casing 10, the cage being rotated by means which impart frequent reversals during the treatment periods during which the lifters act to tumble and open out the material and at other periods with a unidirectional drive during which the lifters traverse the material away from or towards the end door or doors for loading or unloading the cage. The cage has rings 13 resting on and driven by friction rolls driven through gearing from a motor 17 so that the cage is driven at a faster speed during loading and unloading than during its reversal periods. The casing is fitted with a balanced hinged door 19 at one end and. a balanced sliding door 20 at the other end . When the mechanism is used for opening out drying material means are provided within or outside the casing for circulating hot air by a motor 28, and the sliding door may be locked by mechanism coupled to the link screen wiper described in Specification 386,711, [Group XIII], and actuated by a handle: The work may be fed from elevated storage hoppers-through the door 19 and may be delivered through the door 20 into a trolley. The actuation of the doors and the changes in the drive of the cage may be effected automatically by suitable cams, electric or valve timing mechanism. For washing, the cage may also be provided with doors. The machine may be loaded and unloaded at each end in which case the helical lifters are arranged in opposite directions from the centre of the cage.
Patent GB-242299-A (GB)
Title: Improvements in or relating to screws, bolts and nuts
IPC: F16B39/30
Filed: 1925-10-29
Abstract: 242,299. Soc. Franþaise de Filetage Indesserrable D. D. G., (Assignees of Dardelet, H. L.). Oct. 30, 1924, [Convention date]. FIG. 2. Screw-and-nut mechanism.-In a screw thread applicable to bolts b and nuts a, inclined bearing faces of the nut for jamming or locking comprise two sets of faces a<1>a<2>, a<3> a<4> of unequal length spaced apart and connected by faces a<2>a<3> substantially at right angles to the axis, the bolt having corresponding faces b<1>b<2>, b<3>b<4>, and b<2>b<3>. Axial movement of the nut on the bolt is limited by the engagement of the faces a<2>a<3>, b<2>b<3>. Only one of the two sets of faces a<1>a<2>, a<3>a<4> need be inclined as shown, the other being parallel to the axis as at a<5>, curved, or divided into two parts having different inclinations. The rear faces of the threads may be perpendicular to the axis, inclined, or curved. Specification 239,486, [Class 89 (i), Bolts &c.], is referred to.
Patent GB-1075533-A (GB)
Title: Coated polyethylene terephthalate and cellulose acetate butyrate film
IPC: C08J7/043
Filed: 1964-07-01
Abstract: A support material comprises a film of polyethylene terephthalate or cellulose acetate butyrate with a coating thereon produced by the application thereto e.g. by dipping, brushing, spraying, roller-coating or by a contact coating device, of a solution, in a solvent containing trichloracetic acid, trifluoracetic acid or benzophenone, of a copolymer of esters of acrylic and methacrylic acids and/or a thermosetting acrylic polymer or cellulose acetate, polyvinyl butyral, polyvinyl formal, polyvinyl chloride, alkyd resin, or melamine-formaldehyde resin, and removal of the solvent.  The solution may contain calculated on the total weight of the solution, 0.4 to 20% by weight of trichloracetic or trifluoroacetic acid, 0.02 to 10% by weight of Acryloid B44 (a polymer of esters of acrylic and methacrylic acids) and 0.02 to 10% by weight of Acryloid AT-50 (a thermosetting acrylic polymer).  A further coating that is compatible with and adherent to the initial coating may be applied e.g. by dipping.  The further coating may be of an acrylic polymer, cellulose ester, or a gelatin composition.  Specified further coatings may be photosensitive and comprise acrylic resins as binders, silica pigment for taking pencil marks, photosensitive diazonium compound, colour forming coupler and ancillary chemicals such as thiourea, boric acid, citric acid, and tartaric acid; a lacquer suitable for taking pencil markings comprising acrylic resin, melamine formaldehyde resin and finely divided silica pigment.
Patent GB-203283-A (GB)
IPC: G03F7/04
Filed: 1922-10-09
Abstract: 203,283. Galetzka, A., and Richter, O. Aug. 30, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Photo-mechanical printing-surfaces.-A bichromated gelatine film on a glass or like support 's printed from a photographic negative, and the film, after development and hardening is used as a mould on which a printing block is directly cast from a substance which easily sets and hardens. The process is applicable to electrotypes and stereotypes.
Patent GB-674769-A (GB)
Title: Rotary cultivator
IPC: A01B33/02
Filed: 1949-10-24
Abstract: 674,769. Rotary cultivators. STEWART, G. M., and MILLER, A. J. Oct. 24, 1949, No. 27314/49. Class 6(i) A rotary cultivator, of the type having a power-driven transverse rotor 12, is provided with a shield 13, 31, 41 surrounding the rotor, the shield being made in several parts, some of which are adjustable towards or away from the rotor axis. The device is mounted on a frame 11 pivoted at the rear of a tractor 10. The front part, 13, of the shield is secured at its lower end to a curved plate 29 pivoted to a rod 25 which is movable longitudinally by a lever 28, to vary the distance between the shield and rotor axis. The upper end of the portion 13 is pivoted at 14 to a lever 15. Both the lever 15 and its fulcrum 16 are movable by hand levers 17, 22. A spring 23 urges the screen towards the rotor axis. The rear part 31 of the shield is pivoted at 32 to the frame 11, and can be fixed to a bracket 34 in various angular settings. Its lower end carries a relatively-slidable tailpiece 35. A set of blades 37, pivoted to the inside of the shield, can be set at various angles of inclination thereto, and serves to comminute the rearwardly-flung soil. A curtain of pivoted rods 46 serves a similar purpose. The central part, 41, of the shield, is counterweighted at 44 and can be swung up to permit the escape of large clods. A hopper 45, for seed or fertiliser may be mounted in the opening, or other soil treating appliances may be mounted therein. A blade (not shown) may be mounted at the bottom of the section 13 to cut vegetation. The plate 29 causes the whole structure to rise on meeting obstructions.
Patent GB-918544-A (GB)
Title: Improvements in or relating to magnetohydrodynamic electrical generators
IPC: H02K44/26
Filed: 1960-08-08
Abstract: 918,544. Generators operating by electromagnetic interaction with fluids. BROWN, BOVERI & CIE A.G. Aug. 8, 1960 [Aug. 8, 1959], No. 27384/60. Class 35. An alternating current output is obtained at electrodes El, E2, E3 in a magnetohydrodynamic generator by passing ionized gas along duct K in the presence of a rotating radial magnetic field produced by poles P1, P2, P3. As shown, a 3-phase output is obtained when the electrodes are delta-connected and the poles excited from a 3-phase source Q; for polyphase operation the numbers of poles and electrodes are increased accordingly. In a modification, Fig. 3 (not shown), the inner faces of the electrodes and poles may be curved and lie on orthogonallyintersecting circles and leakage field suppressed by the use of short-circuited windings.