baber/WOPTO huggingface dataset:
Patent GB-672204-A (GB)
Title: Improvements in or relating to land grubbers
IPC: A01G23/06
Filed: 1948-04-06
Abstract: The subject-matter of this Specification is identical with that described in Specification 672,118 but the claims differ.
Patent GB-1147902-A (GB)
Title: A trigger circuit
Inventor: SMERDA ADOLF
IPC: H03K3/13
Filed: 1966-05-24
Abstract: 1,147,902. Tunnel diode trigger circuits. TESLA, NARODNI PODNIK. 24 May, 1966 [27 May, 1965], No. 23042/66. Headings H3P and H3T. A trigger circuit includes a Schmitt trigger E 1 , E 2 , incoprating a tunnel diode TD to increase the sensitivity of the circuit and lower the response time by amplifying the signal at the output of E 1  before applying it to the input of E 2 . A choke TL is connected in series with the diode, as shown. The transistor Z and transformer L 1 L 2  may be omitted (Fig. 3, not shown), and the grid of tube E 2  connected to the junction of diode TD and choke TL. The valves may be replaced by transistors.
Patent GB-975721-A (GB)
Title: A continuous process for the purification of raw melamine by means of ion exchange resins
IPC: B01J41/04
Filed: 1963-06-10
Abstract: Melamine containing ammeline, ammelide and/or isotriazinic ring compounds is purified by contacting a solution thereof with a strongly basic ion exchange resin at a temperature of between 50 DEG C. and 95 DEG C.  The solution of crude melamine is preferably percolated through a bed of the resin, the solution of effluent from the bed being treated to crystallize pure melamine and the resulting mother liquor being recycled to the melamine dissolution step, where more crude melamine is dissolved therein.  The resin is preferably regenerated with sodium hydroxide solution.
Patent GB-1337016-A (GB)
Title: Devices for  releasably locking freight containers to one  another or to supports
IPC: F16B12/36
Filed: 1971-04-19
Abstract: 1337016 Container locks BACKTEMANS PATENTER AB 19 April 1971 [9 Feb 1971]  23095/71 Addition to 1311517 Heading E2B In the container locking device described in the Specification 1311517 there is provided an indicator 21 for indicating whether the twist-lock member is or is not in the position which it reaches at the correct completion of the first securing step. As shown, the indicator is pivoted on a pin 23 and is biassed by a spring 25 into the housing 1a, 1b but is moved outwardly through a recess 22 by a cam or pin member 27 on the rotatable shaft 3 which carries heads 2 and 13 angularly offset in relation to each other.
Patent GB-230382-A (GB)
Title: Improvements in or relating to musical instruments
IPC: G10D13/08
Filed: 1924-09-30
Abstract: 230,382. Plastow, F. J. Sept. 30, 1924. Instruments with rods and tubes, percussive.- A keyboard instrument comprises two longitudinal parallel rows b, c of rods or tubes struck by hammers j, k actuated respectively by white and black keys f. The rods b are suspended from an inclined bar d and the rods c from an horizontal bar e, being arranged to hang between the loops of sinuous cords s, or strips of felt. The hammer hinges consist of strips of leather n. Hollow resonators with sound-holes are placed at w, a', q<1>, and without sound-holes at r<1>, s<1>, b<2>, i<1> and at the sides of the case. The resonators r<1>, s<1> are detachable. Arched sounding-boards are placed at m<1>, j<1> and plane ones at b<1>, n<xx>, o<1>, p', j<1>, k', the boards n<xx> and k<1> being apertured. Fixed or movable louvres are arranged at u<1>, h<1>, e<1>, c<2>, l<10>, the louvres u<1> being situated behind textile material t<1>. Openings in the case, in front of the louvres c<2>, are controlled by pivoted shutters e' movable in their own plane by rods g<2> operated by a pedal k<2>. Bars n<2>carrying pins o<2> are movable by arms p<2> to hold the rods b, c against one of the bars t during transit. Pedaloperated dampers may be provided.
Patent GB-834889-A (GB)
Title: Well completion flow choke
IPC: E21B34/02
Filed: 1956-07-26
Abstract: 834,889. Wells. BUTLER, G. A. July 26, 1956 [Feb. 3, 1956]. No. 23181/56. Class 85 [Also in Group XXIX] A well flow choke device comprises a body 10 having inlet and outlet ducts 15, 18, a duct 14 leading to the ducts 15, 18, a closure member 16 for the duct 14, an extension 17 on the closure member, and a flow restriction member 33 carried by the extension and sealed within the duct 18 to restrict flow through the ducts 15, 18. Oil from the well passes through the duct 15, an aperture 44 in the extension, and the bore 45 in the member 33 to the duct 18 which is connected to tanks. In a modification a needle valve member extends through the closure to co-operate with the bore to form an adjustable choke. The body is of materialhaving high resistance to corrosion.
Patent GB-838195-A (GB)
Title: A refrigerating or cooling package and a method of making same
IPC: F25D5/02
Filed: 1958-07-19
Abstract: 838,195. Surgical cooling. BOBBINS, A. A. July 19, 1958, No. 23229/58. Class 81 (2). [Also in Group XIII] A package forming a medical cooling pad or for cooling a storage container is made from flexible chemically-inert material and has a compartment for holding a freezing compound and another holding a hydrous substance (e.g. water or an hydrated salt), means being provided to mix the compound with the substance to produce cold. As shown in Fig. 2, outer and inner sealed plastic containers 1, 6 contain the freezing compound and water respectively and the container 6 can be punctured by a sharp member within the package or ruptured by tearing, the container 1 being left intact. Container 1 may be lined with a reflecting layer 2 to reduce the cold intensity and an absorbent layer to distribute the water. The package of Fig. 2 can be enclosed in an outer envelope containing air to reduce the cooling effect. As shown in Fig. 4, compartments 12, 13 are separated by a welded seam 14 adapted to be opened by pressure on the compartments. As shown in Fig. 9, the plastic container 25 is tied at its middle and one half contains the freezing compound 30 and the other the container 32 for the hydrous material. The compound may include an absorbent for any gases evolved in the reaction.
Patent GB-1042435-A (GB)
Title: Semiconductor devices
IPC: H01L21/00
Filed: 1963-06-11
Abstract: 1,042,435. Semi-conductor devices. INTERNATIONAL RECTIFIER CORPORATION.- June 11, 1963 [June 22, 1962], No. 23275/63. Heading H1K. A method of making a number of semiconductor devices, e.g. unijunction transistors, simultaneously, involves forming a plurality of parallel grooves in opposite faces of a large area wafer, differently doping certain groups of grooves, attaching electrodes to at least some of the grooves, dividing into strips by cutting along certain grooves and then splitting the strips into bars by cuts transverse to the grooves. In one embodiment after diffusing phosphorus into both faces of a high resistivity N-type silicon wafer to form N+ surface zones the resulting glaze is etched off one face and parallel grooves sand-blasted through the N+ layer. P-regions are then formed in the grooves by applying a boron oxide paint and heating. After light sand-blasting both surfaces are coated with nickel by a succession of electroless plating and sintering steps, and grooves parallel to but displaced from the others are sand-blasted through the plating on the lower face. After removing the nickel plating between the grooves on the upper surface the remaining nickel is tinned and coated with lead. Finally the wafer is subdivided as described above to form individual unijunction elements to which wires 65, 66 and 67 are soldered (Fig. 7, not shown). In an alternative method registering sets of parallel grooves are formed in both wafer faces before the phosphorus diffusion step. The grooves are filled with wax and the exposed parts of N+ layer removed by etching. Further parallel registering sets of grooves are then interlaced with the existing grooves on both faces and P-layers formed therein as described above. The wafer is then provided with nickel coatings in all the grooves and subdivided by cuts along the N+ grooves. After tinning the grooves the resulting slices are cut into bars, Fig. 16, wires 117, 118 are attached to the N + regions and a hook-ended wire 116 attached to both P zones.
Patent GB-1417536-A (GB)
Title: Drive for an adaptor for a cassette tape recorder
IPC: G11B15/28
Filed: 1974-05-24
Abstract: 1417536 Recording and playback TAPECON Inc 24 May 1974 [24 May 1973] 23339/74 Heading G5R An adapter 10, removably insertable in a tape recorder to take off drive from the capstan 11 and pinch roller 12 thereof, comprises a rotatable shaft 18 carrying an elastomeric hub 19 having a cylindrical elastomeric rim 20 surrounded by a substantially rigid cylindrical sleeve 21; in use, the sleeve 21 is engaged by the pinch roller 12 to press the inside surface of the rim 20 against the capstan 11. As shown, the adapter shaft 18 carries a pulley 22 which, through a belt 23 and a second pulley 24, drives a friction roller 16 to feed a record card 15 past a spring-biased magnetic head 14.
Patent GB-1133404-A (GB)
Title: Waterproof panties for infants and method for producing the same
IPC: A41B13/04
Filed: 1967-05-19
Abstract: 1,133,404. Infants panties. W. W. ARTZT. 19 May, 1967 [22 March, 1967], No. 23370/67. Heading A3V. In an infant's waterproof panty formed from a thin thermoplastic sheet folded at 14 upon itself and heat sealed at the side edges 16, 18, arcuate portions 26 are provided at the ends of the leg openings to resist tearing of the panty. The waist portion may be hemmed at 132 to receive a draw string 134. The panties may be made by longitudinally folding a continuous web upon itself, which is cut along the lines 16, 18, 20, 22, the side edges 16, 18 being simultaneously heat sealed.
Patent GB-1461411-A (GB)
Title: Boilers
IPC: B01J8/38
Filed: 1973-05-16
Abstract: 1461411 Fluidized bed combustion apparatus ENERGY EQUIPMENT CO Ltd 3 May 1974 [16 May 1973] 23434/73 Heading F4B Fluidized combustion apparatus for use in shell type boiler comprises a cylindrical combustion chamber having a distributer plate for the fluidizing air shaped so that the depth of the fluidized bed is non-uniform. A boiler, Fig. 1, may have a number of fluidized beds A1-A5 and smoke tubes H, J. Each fluidized bed has an inclined distributer plate B of upwardly convex cross-section with air supply nozzles C. Solid fuel is supplied to the bed by channels T from a screwfeeder D. The air plenum chamber is tapered to equalize the air supply pressure, and partitions F divide the bed into separately stoked compartments. A starting burner G is directed on to the first compartment. Ash and unburnt fines flow over the partitions F to secondary combustion bed in the transition chamber E of the boiler, baffles L returning heavier particles to the primary bed. An overflow tube K in the secondary bed withdraws ash. The distributer plate may be a perforated plate of inverted V- shape with a refractory mat serving to protect the plate. The fuel may be supplied through slots V in the plate, Fig. 4. Overflow tubes may be arranged in the primary bed, a space at the bottom of the cylindrical combustion chamber serving for the removal of ash (Fig. 5). Fuel may be supplied to the bed by a number of inclined tubes discharging above the distributer plate, and the fuel may be liquid or gaseous.
Patent GB-728924-A (GB)
Title: New or improved speed-change gear unit for motor-vehicles, especially tractors
Inventor: HAVERLENDER KARL
IPC: B60K17/28
Filed: 1952-09-19
Abstract: 728,924. Change-speed gear. HANNOVERSCHE MASCHINENBAU-AKT.-GES. VORM. G. EGESTORFF HANOMAG. Sept. 19, 1952, No. 23522/52. Class 80 (2). [Also in Group XXXI] A free space is provided between the usual main clutch 9 and main change-speed gear 4 of a tractor for an auxiliary under- or over-drive two-speed gear, the countershaft 33 of which is formed by a divided extension of the existing power take-off shaft 15. In its original form, Fig. 1 (not shown), the clutch-shaft 22 extends solidly to the input bevel 11 of the-main changespeed gear 4, the bearing-housing of which bevel is bolted to an intermediate wall 5 of the main casing, and a pinion fast on the clutch shaft is adapted to be meshed by a wheel slidably splined on the front end of the power take-off shaft 15. As modified, an oil-retaining casing 21 for the auxiliary two-speed gear replaces the original bearing-housing of the bevel 11, whilst still forming the front oil seal for the main change-speed gear casing 4. The clutch shaft 22 is divided into front and rear sections 22, 23, the latter carrying the main gear input bevel 11, the sections being clutched together at 30, 25 for direct-drive, in the forward position of a a clutch-dog 24, splined on the rear section 23, and movable to a rear position to clutch a freelymounted wheel 29 driven from the front section through reducing wheel-pairs 32, 38; 37, 29. The wheels 37, 38 are fast on a countershaft 33 forming the forward section of a divided power take-off shaft, replacing the original single shaft and comprising also a rear section 15 having a splined dog 35 for clutching at 34 the front section 33. Access to the lower part of the auxiliary gear-casing for oil-drainage at 39 is through a removable cover plate 41 closing the clutch housing.
Patent GB-1370601-A (GB)
Title: Windshield wiper assembly
IPC: C07C1/00
Filed: 1973-03-17
Abstract: 1370601 Windscreen wipers ANDERSON CO 17 May 1973 [26 May 1972] 23629/73 Heading A4F A windscreen wiper assembly comprises a wiper harness having main and secondary yokes 32, 34 of inverted V-shaped cross-section rockably inter-connected by the engagement of inturned tabs 44 at each end of the yoke 32 in notches in the lower bottom edges of the yoke 34, the top of each end of the main yoke 32 being disposed further outwardly than the bottom, and a recess 56 is formed in the top ridge of the secondary yoke 34 beneath the adjacent end of the main yoke 32. During the relative rocking of the yokes 32, 34 the recess 56 accommodates a burr 54 formed on the yoke 32 during its manufacture by die stamping.
Patent GB-303762-A (GB)
Title: Improvements relating to resilient couplings for shafts or the like
IPC: F16D3/00
Filed: 1927-09-08
Abstract: 303,762. Fletcher, G. H., Rusby, H., and Metropolitan-Vickers Electrical Co., Ltd. Sept. 8, 1927. Universal joints. - In resilient couplings for shafts and other normally-coaxial but laterallydisplaceable members, a resilient floating member is constrained at two or more points by guides associated with the coupled parts, the mutually-parallel guide-surfaces on one part intersecting the mutually-parallel guide-surfaces on the other at points substantially removed from the axis, so that lateral displacement of the parts occurs freely, while torque produces distortion of the floating member. Slidable balljoints allowing axial and tilting movements are employed when the coupling is used for driving the track-wheels of locomotives and other vehicles. The track-wheels 1, Figs. 1 and 2, is coupled to the gear-wheel 2 on a. quill-shaft 3 by ball-headed pins 8, which engage shoes 9, axially and radially slidable in parallel slots 7 in blocks 6, which slide in inclined parallel guides 5 formed in the wheel 1, the blocks 6 being connected by a floating spring-steel &c. ring or rings 10, 11, engaging trunnions 12, 13. In a modification, the gear-wheel 14, Fig. 4, is hollow, shoes 24 being ball-jointed on pins 20, which are connected by resilient rings 21, 22 and carry shoes 23 sliding in inclined guides formed in the walls of the wheel 14. The shoes 24 are slidable laterally and endwise in guides 19, which are perpendicular to those in the wheel 14 and are carried by webs extending from a member 16 rigid with the track-wheel hub 17. A casing 25 is provided. In a further modification, the shoes are replaced by anti-friction rollers (Figs. 5 and 6, not shown), the guides 19 being provided on a member at an intermediate part of the axle and having each a groove to coact with a ribbed roller, which is slidable on its pin 20. Rollers may be used in other forms. The resilient rings may lie within the hollow gearwheel. The Provisional Specification describes also modifications of the first construction, according to which the blocks 6 may be axially slidable additionally or alternatively to the shoes 9, the guides 5, 7 may be disposed at right angles, and the rings 10, 11 may be of arcuate or other form.
Patent GB-1512095-A (GB)
Title: Optical transmission line terminal
IPC: G02B6/36
Filed: 1975-05-30
Abstract: 1512095 Light guides NIPPON ELECTRIC CO Ltd 30 May 1975 [5 June 1974] 23691/75 Addition to 1428447 Heading G2J A terminal for an optical fibre or for a bundle of such fibres is similar to the one described in Parent Specification, but the wider end of the axial passage contains a cylindrical guide member made of a thermally insulating material which has a softening point higher than that of the coating of the fibre. This arrangement prevents premature softening of the fibre coating on being inserted into the heated terminal.
Patent GB-1314116-A (GB)
Title: Polyvinylcarbazole photographic systems
IPC: G03F7/029
Filed: 1971-04-19
Abstract: 1314116 Photosensitive materials HORIZONS RESEARCH Inc 19 April 1971 [16 March 1970 14 April 1970 (2)] 23692/71 Heading G2C A photosensitive material comprises at least one organic halogen compound in at which at least three halogen atoms other than fluorine are attached to a single carbon atom and at least one N-vinyl compound dispersed in a binder comprising polyvinyl carbazole. Positive coloured images are produced by imagewise exposing the material on a support to ultra-violet radiation heating to 140‹ to 170‹C, and then uniformly exposing to light between 3800 to 4500A to develop and fix the image. Negative coloured images are produced by imagewise exposing the material on a support to visible light, heating and the uniformly exposing to ultra violet light to develop and fix the image. A sensitizer such as rubrene may be added in which case the heating step may be omitted. The heating step may be accompanied by an exposure to red light or infrared radiation (negative process), or to a sodium lamp (positive process) before heating which is then between 60 and 117‹C. A bleach-out dye or a dye base may be added which gives a positive image on imagewise exposure to visible light and heating and this image is reversed on a uniform ultra-violet exposure. The preferred N-vinyl compound is N-vinyl carbazole which may be admixed with substituted N-vinyl carbazoles, N-vinylarylamino, N-vinylamides, N-vinylindole, N-vinylpyrrole and N-vinylpyrrolidone. Such mixtures improve the speed of the material. The material may also contain triphenyl compounds of P, Sb, As or Sn, or cresols as stabilizers.
Patent GB-1069284-A (GB)
Title: Production of catalysts or catalyst carriers in the form of hollow beads
Inventor: BAER KARL
IPC: B01J35/04
Filed: 1964-06-09
Abstract: In Examples 5 and 8, nitrobenzene is hydrogenated to aniline in presence of hollow silica beads impregnated with copper, at temperatures of 280 DEG -290 DEG  C.ALSO:Catalysts or catalyst carriers in the form of hollow beads are prepared by spraying a hydrogel containing at least 30% by weight of water and/or a suspension and/or a solution of metal compounds at a pressure of 10 to 100 atmospheres into a tower-shaped vessel, and cocurrently introducing a gas at 300 DEG  to 700 DEG  C. in amounts of 4 to 18 cubic meters per kgm. of initial material.  Hydrogels of silicic acid, alumina, silicates and titania are mentioned, Al, Mg, Zr or Zn salts may be added in preparing a silicic acid hydrogel.  The metal compounds may be compounds of Cu, Ag, Zn, Mg, Al, Sn, Pb, V, Cr, Mo, W, Mn, Fe, Ni, Co, Pt or Pd.  The hollow beads may be treated with halogen or a phosphoric acid. Examples relate to (1), (5) silica gel; (2), (3) alumina gel; (4) aluminium phosphate; (6) alumina + Co + Mo; (7) Mo + P + V; (8) silica gel + Cu.ALSO:Catalysts or catalyst carriers in the form of hollow beads are prepared by spraying a hydrogel containing at least 30% by weight of water and/or a suspension and/or a solution of metal compounds at a pressure of 10 to 100 atmospheres into a tower-shaped vessel, and cocurrently introducing a gas at 300 DEG  to 700 DEG C. in amounts of 4 to 18 cubic meters per kgm of initial material.  Hydrogels of silicic acid, alumina, silicates and titania are mentioned.  Al, Mg, Zr or Zn salts may be added in preparing a silicic acid hydrogel.  The metal compounds may be compounds of Cu, Ag, Zn, Mg, Al, Sn, Pb, V, Cr, Mo, W, Mn, Fe, Ni, Co, Pt or Pd.  The hollow beads may be treated with halogen or a phosphoric acid. Examples relate to (1), (5) silica gel (2), (3) alumina gel; (4) aluminium phosphate; (6) alumina +Co+Mo; (7) Mo+P+V; (8) silica gel +Cu.  A reactor for hydrogenation of nitrobenzene has diameter to height ratio 1:4 and has twenty two-component nozzles arranged at three levels above the grate at the bottom of the reactor.  The upper portion of the vessel is widened to 1 1/2 times and includes a cyclone; reaction gases leaving by the cyclone are recycled via a heat exchanger, condenser, gas-liquid separator, preheater and pump.  Cooling tubes are arranged in the catalyst layer at a distance from the wall of the reactor.
Patent GB-645781-A (GB)
Title: Protective arrangement for electric discharge lamps
IPC: H05B41/46
Filed: 1948-09-10
Abstract: 645,781. Control systems for space discharge lamps; protective arrangements. BRITISH THOMSON-HOUSTON CO., Ltd., and MILLS, R. V. Sept. 10, 1948, No. 23854. [Class 38 (iv)] [Also in Group XXXVII] A protective arrangement for a discharge lamp 1 supplied through the usual series impedance 2 connected in the live supply lead, and which is capable of disconnecting the lamp from the supply when an earth fault occurs on the load side of the impedance, e.g. in the lamp fitting, whereby the fault current is limited by the impedance 2, comprises contacts A, B connected in the " live " supply lead, and operating means capable of opening the contacts in response to a predetermined difference between the current through the current limiting impedance and a current proportional to the supply voltage. In the arrangement described the contacts A, B are each associated with a bimetallic member, the two members being arranged to deflect in the same direction when heated respectively by element A1 connected across the supply leads and element B1 connected in the neutral lead of the lamp-operating circuit, so that upon an " earth " fault occurring at X the deflection of the lower bimetallic member diminishes and causes the contacts to open.