baber/WOPTO huggingface dataset:
Patent GB-289457-A (GB)
Abstract: 289,457. F³lscher, J. April 29, 1927, [Convention date]. Two-stroke-cycle engines.-In order to secure purity of the charge without too much loss of scavenging-air, the exhaust ports 8 are closed by a valve 11 not later than the point at which the piston has travelled five per cent of its stroke past the lower deadcentre, the inlet ports 9 still remaining open.
Patent GB-914707-A (GB)
Title: Stabilized dicalcium phosphate dihydrate
IPC: C01B25/32
Filed: 1959-08-25
Abstract: A stabilized dicalcium phosphate dihydrate consisting of 98-99 parts by weight of precipitated dicalcium phosphate dihydrate may be prepared by reacting a dilute solution of orthophosphoic acid with milk of lime to produce a reaction mixture having a pH of 5 to 6,5, adding 0,4 to 0,8% by weight of pyrophosphoric acid, containing at least 40% H4P2O7, completing the neutralization by adding further milk of lime until a pH of 6,9 to 7,2 is reached, removing and drying the formed dicalcium phosphate dihydrate, and mixing therewith 0,6 to 1,2% by weight of finely-divided (not more than 40 micron particle size) calcium sodium pyrophosphate, which may have been obtained by reacting a dilute solution of sodium pyrophosphate with a dilute milk of lime or other soluble calcium compound.  The product may be employed as a constituent of dentifrice compositions.ALSO:A stabilized dicalcium phosphate dihydrate, consisting of 98-99 parts of weight of precipitated dicalcium phosphate dehydrate in the precipitation of which 0.4 to 0.8 parts of pyrophosphoric acid (at least 40% H4P2O7) are added before the precipitation is complete, and 0.6 to 1.2 parts by weight of calcium sodium-pyrophosphate of particle size not larger than 40 microns admixed with the precipitate, is employed as a constituent of dentifrice compositions. Other constituents may include water, humectants such as glycerine or sorbitol, gums such as carboxymethyl cellulose or Irish moss, and additives such as sarcosinates, saccharin, sodium lauryl sulphate, and flavouring agents.
Patent GB-856056-A (GB)
Title: Improvements in contacts for electric switches
IPC: H01H50/54
Filed: 1957-09-16
Abstract: 856,056. Contact-members for switches. CRABTREE & CO. Ltd., J. A., CARDING, J. T., and JELLEY, G. A. Sept. 10, 1958 [Sept. 16, 1957], No. 29036/57. Class 38 (5). A bridging contact 14 for an electromagnetic switch is urged against the end of an insulating actuating cylinder 1 by pins 16 passing through arms 6 attached to a piston 3. A spring 9 acts between a plate 10 having its ends in apertures 12 in the cylinder 1 and a sealing washer in the piston-head, through which the ends of the arms 6 pass. When contact buttons 18 on the bridge 14 engage fixed contacts 24, as the cylinder 1 is moved by a rod 5 in a hole 4, contact bounce is restricted by the action of the piston which is sealed in the cylinder by a viscous material such as grease. Arcing contacts are formed by the ends 19a of a thin strip 19 on the bridging contact and co-operate with " de-ion " grids 32 in arc chutes 31, as described in Specification 856,057. Fig. 5 shows one phase of a threephase unit on a common back-plate 20 and with a mounting-block 21 for each phase. Straps 25 carrying terminals 27 are secured to each block 21 by screws 29 and the contacts 24 are secured to the straps and blocks by screws 28.
Patent GB-1417855-A (GB)
Title: Piston rings and pistons
IPC: F16J9/00
Filed: 1972-06-21
Abstract: 1417855 Pistons J N FAWCETT 20 Sept 1973 [21 June 1972] 29175/72 Heading F2T The plane of a piston ring and its groove are inclined at an angle (a) not greater than 5 degrees to the plane normal to the generatorix of the ring outer surface and/or the longitudinal axis of the piston. The ring may be elliptical and may have its end faces 11b, 11c, Fig. 6a, 11d, 11e Fig. 6b, parallel or inclined to each other. The gudgeon pin axis Y-Y may be offset from the piston axis. Means to prevent ring rotation may be provided.
Patent GB-915152-A (GB)
Title: Improvements in or relating to separators
IPC: B04C5/185
Filed: 1961-08-14
Abstract: 915,152. Centrifugal separators. EQUIPMENT ENGINEERS Inc. Aug. 14, 1961 [Aug. 26, 1960], No. 29324/61. Class 23. In apparatus for separating solids from liquid, e.g. for removing sand and silt from water, and comprising a hydro-cyclone comprising a shell 10 having a tangential feed inlet 11 and a vortex finder 14 for overflow liquid at one end and solids discharge means 16 at the other end delivering into a gravity settling tank 17, the solids are discharged tangentially to the shell. The shell 10 has a cylindrical portion 10a and a conically-tapering portion 10b and the means 16 comprises a tangential wall 23, Fig. 3, extending to a passage 22 connected to an outlet pipe 24. Liquid from the top of the tank 17 is bled back to the shell 10 at the solids discharge end by a pipe 26. Collected solids may be removed from the tank 17 through a valve 29. The shell 10 including the inlet and outlet means may be rubber-lined. In a modification, Fig. 5 (not shown), the shell is vertically disposed. Dimensions and performance figures for the apparatus are given in the Specification.
Patent GB-293306-A (GB)
Abstract: 293,306. Soc. Civile pour l'Etude de la Photographie et de la Cinematographie en Couleurs. July 2, 1927, [Convention date]. Colour photography; films, preventing halation in.-Relates to lenticular films for use in colour photography and kinematography, of the kind described in Specification 10611/09, and consists in introducing into the emulsion layer a colouring agent adapted to render non-actinic that part of the incident light which is reflected by the surface of the emulsion in contact with the support. The agent must be of such a nature that it can be removed subsequently by solvents. Dyestuffs may be used, such as indulines in emulsions for making negatives, or tartrazine in emulsions for making positives, and may be introduced into the emulsion before or after coating. Salts such as silver chromate may also be used, and are added to the emulsion before coating.
Patent GB-445862-A (GB)
Title: Improvements in the manufacture and production of azo dyestuffs
Filed: 1934-10-15
Abstract: Azo dyes are made in substance or on the fibre by coupling an aromatic diazo compound with b -hydroxytriphenylene or its derivatives.  In examples, the following dyes are described: (1) 1 - amino - 2 - nitro - 4 - chlorobenzene --> (in substance or on the fibre) b -hydroxytriphenylene (obtained by alkali fusion) (deep red-brown); other components specified are o-chloraniline, 2 : 5-dichloraniline, o-nitroaniline, 1-amino - 2 - methoxy - 4 - benzoylamino - 5 -methylbenzene, 1-amino 2-chlor - 4 - benzoylamino - 5-methoxybenzene, 4 amino-3-methoxydiphenyl-amine, 1-amino-4-benzoylamino-2 : 5-diethoxy-or dimethoxybenzene, p - nitroaniline --> 1-amino - 2 : 5 - dimethoxybenzene, dianisidine (brown, violet and blue-black shades); (2) sulphanilic acid --> b -hydroxytriphenylene (red brown on wool); (3) 2 : 5-dichloraniline --> b  - hydroxytriphenylene sulphonic acid (obtained by sulphonation); (4) 1-amino-2-hydroxy - 5 - nitrobenzene - 3 - sulphonic acid --> b -hydroxytriphenylene (chocolate brown on wool when after-chromed or in the single-bath process); the chromium compound prepared in substance dyes silk in dark brown shades; (5) metanilic acid --> b  : b -dihydroxytriphenylene (obtained by alkali fusion of the disulphonic acid) (deep brown on leather); (6) 1 - amino - 2 - nitro - 4 - chlorobenzene --> (on cotton) the dianilide of b  : b -dihydroxytriphenylene dicarboxylic acid (from b  : b -dihydroxytriphenylene and carbon dioxide under pressure) (violet brown); the di-o-toluidide, di-a -naphthylamide or di-o-anisidide are also specified; (7) 2 nitro-4-chloraniline or 2 : 3-dichloraniline --> (on cotton) b -hydroxytriphenylene - o - carboxylic acid anilide (deep brown); (8) 2 : 5-dichloraniline --> (on cotton) b  - hydroxytriphenylene - o - carboxylic acid-o<1>-toluidide (dark brown); other components specified are m-chloraniline, o-, m- and p-nitroaniline, 4-chlor-2-nitroaniline, 4-nitro-2-methoxy 1-aniline, 1-amino-2-methoxybenzene-5-sulphonic acid diethylamide, 3-nitro-6-methyl-1-aniline, 4-amino-2 : 3<1>-dimethyl-1 : 1<1>-azobenzene, 1-o -trifluormethyl-4-chloro-3-aminobenzene; the p<1>-anisidide; (9) m-nitraniline or 1 - methoxy - 2 - aminobenzene - 4 - sulphonic acid diethylamide --> (on cotton) b -hydroxy-triphenylene - o - carboxylic acid - p<1> - chloranilide; 1 - amino - 2 - methyl - 5 - nitrobenzene, 1 - methoxy - 2 - amino - 4 - chlorobenzene or 1-methoxy - 2 - benzoylamino - 4 - chloro - 5 - aminobenzene --> (on cotton) the m-toluidide; 1-methoxy - 2 - amino - 4 - chlorobenzene --> (on cotton) the p-toluidide; (10) 1-methoxy-2-amino - 5 - nitrobenzene, 2 : 5-dichloraniline, o-nitroaniline, 3-nitro-4-toluidine, 1-amino-2-nitro-4-chlorobenzene, 5-nitro-2-toluidine or 1 - methoxy - 2 - amino-4-chlorobenzene --> (on cotton) b  - hydroxytriphenylen - o - carboxylic acid-o<1>-anisidide (brown shades).  The Provisional Specification refers to methyl derivatives of hydroxytriphenylenes.
Patent GB-1453955-A (GB)
Title: Sulphur-containing amino compounds and gasoline compositions  containing them
IPC: C08F8/34
Filed: 1973-06-21
Abstract: 1453955 Polyolefin derivatives BRITISH PETROLEUM CO Ltd 20 May 1974 [21 June 1973] 29474/73 Heading C3P [Also in Division C5] Compounds of formula where R is a hydrocarbyl group containing at least 20 carbon atoms and derived from a polyolefin, A is an aminoalkyl group, R<SP>1</SP> is H or a hydrocarbyl or aminoalkyl group, and n is 1 to 10, may be prepared by reacting an acid with a polyamine HNR<SP>1</SP>A to form an amide HS(CH 2 ) n CONR<SP>1</SP>A, reacting the amide with an alkali metal alkoxide to form where M is alkali metal and further reacting with a polyolefin halide RX. R may be derived from a polymer of ethylene, propylene, butenes or 4-methylpentene-1, preferably isobutylene. The products may be used as carburettor detergents in gasolines. In an example thioglycollic acid is reacted with N,N-dimethylpropylene-1,3- diamine and the product successively with sodium ethoxide and chlorinated polyisobutylene.
Patent GB-1149865-A (GB)
Title: Shaft bearing
IPC: F16C27/02
Filed: 1966-06-30
Abstract: 1,149,865. Bearings. STAMICARBON N.V. 30 June, 1966 [30 June, 1965], No. 29500/66. Heading F2A. In a bearing for a vertical shaft, bearing elements are resiliently urged, by spring action parallel with the shaft axis, against a sloped surface or against sloped surfaces which cams or which cam said elements radially inwardly against a portion of the shaft or a sleeve, &c. attached thereto so that the bearing elements centralize the shaft. The maximum radial movement of the shaft is limited by a surface or surfaces which do not engage the shaft when the latter is in a central position. In an embodiment a shaft 1, Fig. 3, has an integral sleeve 11 of hardened steel having an upper flange engaging the top end of a bearing sleeve 13. The latter, which may be made of P.T.F.E. or nylon, limits gyratory motion of the shaft 1 and has its lower end chamfered so as to co-operate with three arcuate shoes 19 having chamfered top ends and being made of graphitized carbon. The shoes 19 are urged into engagement with the sleeve 11 by means of a spring 20 and are prevented from rotating by means of pins 26. In modifications the shoes 19 could be received in recesses formed in the sleeve 13 or could be replaced by a sleeve 21, Fig. 2, made of P.T.F.E. mixed with carbon.
Patent GB-729439-A (GB)
Title: Improvements in and relating to electrical switching arrangements suitable for use in electric telegraph systems
Inventor: DAIN GORDON TAYLOR
IPC: H04L25/04
Filed: 1951-12-17
Abstract: 729,439. Two-way transmission. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. Nov. 20, 1952 [Dec. 17, 1951], No. 29531/51. Class 40 (4). [Also in Group XL (b)] A switching arrangement for a signalling system arranged for two-way transmission over separate conductors and employing a piece of equipment at an intermediate point in common for both directions of transmission in which a control unit arranged to respond to the signals in each direction includes a thermionic toggle device controlling a relay adapted to change over the connection of the common equipment so as to be appropriate for the direction of transmission then prevailing. In the circuit shown a positive start impulse, assuming that the normal stop condition on the line is negative, renders a valve V1 conductive and the fall in voltage across a resistance R3 renders a rectifier MR1 conducting so that a valve V2 of the toggle pair V2, V3 is cut off, and the valve V3 conducts, thus energizing the righthand winding of the relay X/2 to move its contacts x1 x2 to the position shown in which signals from a station A over the line Lla pass to the repeater R, preferably of electronic type, and over contacts x2 to the line L2b leading to the receiver of a second station B. During signalling, positive and negative impulses reach the grid of the valve V1, but will be without effect on the valve pair V2, V3 on account of the rectifier MR1. When signalling is to start from the transmitter at station B, the positive start impulse of a code signal combination on the line L1b makes V4 conducting and the fall in potential across the anode resistance R11 acts via rectifier MR2 to cut off the valve V3 so that valve V2 conducts and the current through the left-hand X winding of the relay - which reverses contacts 2 xl, x2 and signals from the line L1b pass through the repeater R and via contacts xl in its opposite position to the conductor L2a leading to the receiver of station A.
Patent GB-437694-A (GB)
Title: Improvements in or relating to infusers for tea, coffee and the like
IPC: A47J31/06
Filed: 1934-10-16
Abstract: 437,694. Infusers. BAKER, Ltd., F., BAKER, A., and BAKER, H. W., 30, Park Street, Birmingham. Oct. 16, 1934, No. 29534. [Class 129] An infuser for insertion into teapots &c. comprises a perforated cup member 1 for holding the tea leaves and a collar 6. The cup member 1 is made of glass or ceramic material and has a flange 3 at its top. A metal collar 6 is attached to this flange by spinning or pressing. This collar may also be perforated. The collar is shouldered as at 9 for fitting the teapot rim 7.
Patent GB-1387007-A (GB)
Title: Method and apparatus for the non-contacting determination of contents of moisture
IPC: G01N23/09
Filed: 1972-06-23
Abstract: 1387007 Measuring moisture content OSTERREICHISCHE STUDIENGESELLSCHAFT FUR ATOMENERGIE GmbH 23 June 1972 [24 June 1971] 29620/72 Heading G1A The moisture content of a material is determined by a method in which the material is irradiated with high energy neutrons and the number of thermal neutrons emitted in the forward direction is counted to determine the weight of hydrogen, simultaneously the total weight of the same portion of material is determined by measuring the absorption of γ-rays, and the two measurements are combined by multiplying the neutron count by the cube root of the γ-ray count. As shown, Fig. 1, a material 1 such as sintered metal ore on a conveyor belt 2 is passed between a radioactive source 3 and a detector 4 the output of which is passed to two discriminators 7, 8 which select only those pulses corresponding to thermal neutrons and γ-rays respectively. The discriminator outputs are converted to logarithmic form (9, 10) and one third of the gamma value is taken and added to the neutron value (11). A signal equal to the output value of adder 11 for the same material but having zero moisture content is selected from a store 13 containing the required values for a number of different materials and substracted in differential amplifier 12. The antilogarith is formed (14) and the resultant moisture content signal applied to an indicator 15 or via line 16 to a control system for the addition of water. The output signal is FD<SP>1/3</SP>/F 0 D 0  1/3 where F and D are the neutron and 7-data respectively and F 0  and D 0  are the corresponding stored data for the dry material, and this function is said to be independent of the thickness of the sample above a threshold value. The indicator 15 may provide audio or visual alarms for selected maximum or minimum values of the moisture content. A checking device 17 may provide an inhibiting signal to the indicator and control circuit or actuate an alarm in the layer thickness as determined from the 7-ray measurements drops below the linearity threshold level. The radiation source 3 comprises a central rod 18 of Am 241-Be emitting high energy neutrons surrounded by four rods of Cs-137 emitting 7-rays supported with a Cd shell (21) by paraffin wax (20), the shell also being supported within an outer shielding container (23) by paraffin wax (22) the outer layer of which contains B.
Patent GB-748310-A (GB)
Title: Improvements in or relating to process for increasing the viscosity and viscosity index of lubricating oils
IPC: C08K5/02
Filed: 1953-10-27
Abstract: The viscosity and viscosity index of a synthetic lubricating oil is increased by heating the oil with 0.1-5 per cent by weight of a C1 or C2 poly - halogenated hydrocarbon.  The lubricating oil may be a polyglycol, a glycol ether, an ester, a formal or an acetal. Specific ester lubricating oils are diesters, such as di-2-ethylhexyl sebacate and the corresponding adipate, and complex esters derived from combinations of dihydric alcohols, dicarboxylic acids, and monocarboxylic acids and/or monohydric alcohols.  The poly-halogenated hydrocarbon may be a chloride, bromide, iodide, chloride-bromide or chloride-fluoride of methane or ethane or a mixture of such substances, but preferred substances are carbon tetrachloride, ethylene dichloride and chloroform.  It is believed that the poly-halogenated hydrocarbon reacts with the lubricating oil with subsequent elimination of hydrogen halide from the reaction product, thereby forming condensation products of two or more molecules of lubricating oil.  In the examples, synthetic lubricating oils (n-butyl ether of polypropylene glycol or C8 oxo acid ester of 1,3-butanediol) are heated with carbon tetrachloride.ALSO:The viscosity and viscosity index of lubricating oil is increased by heating the oil with 0.1-5 per cent by weight of a C1 or C2 poly-halogenated hydrocarbon.  The lubricating oil may be a mineral oil or a synthetic oil such as a polyglycol, a glycol ether, an ester, a formal, an acetal or a polyolefin.  Specific ester lubricating oils are diesters, such as di-2-ethylhexyl sebacate and the corresponding adipate, and complex esters derived from combinations of dihydric alcohols, dicarboxylic acids, and mono carboxylic acids and/or monohydric alcohols.  The poly-halogenated hydrocarbon may be a chloride, bromide, iodide, chloride-bromide or chloride-fluoride of methane or ethane or a mixture of such substances, but preferred substances are carbon tetrachloride, ethylene dichloride and chloroform.  It is believed that the poly-halogenated hydrocarbon reacts with the lubricating oil with subsequent elimination of hydrogen halide from the reaction product, thereby forming condensation products of two or more molecules of lubricating oil. The treated lubricating oil may be modified by the addition of such substances as antioxidants, metal deactivators, corrosion inhibitors, rust inhibitors, load carrying agents, thickeners, tackiness agents, detergents and polysilicone defoamers. In the examples, mineral lubricating oil or synthetic lubricating oil (n-butyl ether of polypropylene glycol or C8oxo acid ester of 1, 3-butanediol) are heated with carbon tetrachloride.  The addition of barium isooctyl phenol sulphide and a polysilicone anti-foaming agent to the CC14-treated mineral lubricating oil is also described.
Patent GB-679266-A (GB)
Title: Improvements in overall tracks for the pneumatic tyres of road vehicle wheels
IPC: B60C27/08
Filed: 1949-11-21
Abstract: 679,266. Endless tracks for vehicles. DENNISON, E. A. Nov. 17, 1950 [Nov. 21, 1949], No. 29697/49. Class 79(i) In an overall track for pneumatic tyres of vehicle wheels comprising shoes having side flaps hinged thereto and lateral retaining chains connecting the side flaps, each shoe having a tread portion formed of two twisted elements, the twisted elements are secured to the shoe by means of flat bars parallel to the hinge pins of the side flaps, the two elements being spaced apart to a distance greater than the width of the side flaps. As shown consecutive shoes are interconnected by two lengths of chain each having five links. Each shoe is formed of the two twisted elements 21 having end tabs 22 which are riveted to the flat bars 20. To each bar 20 is riveted channel section members 16, 17, the flanges of which are apertured to receive the hinge pin 14 on which is pivoted the side flap 13, and between the ends of the pin 14 is fitted a stop piece 28 to limit the hinging movement of the flaps. The chains 25 are engaged in pockets 26 by means of bolts 27 and eccentric washers 29. Devices 12 of the kind described in Specification 350,230 are employed to couple the ends of the track. Specifications 385,747, 498,934, and 555,250, [Group XXXIV], are referred to.
Patent GB-1446316-A (GB)
Title: Transfer systems
IPC: B65G25/04
Filed: 1973-06-22
Abstract: 1446316 Toothed gearing J H BREMS 22 June 1973 [26 June 1972] 29714/73 Heading F2Q [Also in Division B8] A mechanism for transmitting drive to a reciprocating conveyor (Division B8) comprises a planetary carrier 8 rotatable in a case 2 and supporting a planetary cluster 14, 16 associated with the output shaft 24 which is eccentric to a planetary shaft 12. Gear 16 is driven by a gear 36 on an input shaft 38. An internal gear 26 engages the planetary gear 14 and is normally held from rotating within the case 2 by an overload spring device 28, 30, 32. Fig. 3 indicates a portion of the 'square' locus of the shaft 24 (axis A3). In a modification, Fig. 5, a sprocket 66 driven from an input shaft 74 has an eccentric output shaft 68, and a sprocket 84, normally maintained stationary, is connected by a chain 82 to a planetary sprocket 80 mounted on a shaft 60 which carries the sprocket 66. In a further modification, Fig. 7, an intermediate gear (118 Figs. 6, 8 not shown) meshes with an input gear 116 and with a gear 138 mounted on a shaft 140 which carries an output shaft 146.
Patent GB-1291241-A (GB)
Title: Electrical switches
Inventor: FOLEY DAVID
IPC: H01H23/16
Filed: 1969-06-12
Abstract: 1291241 Snap-action switches JOSEPH LUCAS (INDUSTRIES) Ltd 14 May 1970 [12 June 1969] 29753/69 Heading H1N A switch having a plurality of fixed contacts 13 carried on a base 12 has a pivoted operating member 15 with a spigot 16 engaged with a slidable contact member 17, and a compression spring 21 surrounding the spigot to urge the contact member 17 into engagement with the base 12 and acting as part of an over-centre mechanism urging the contact member 17 and operating member 15 to one side or the other of a central position. The contact member 17 is of phosphor bronze and H-shaped to bridge contacts 13 in pairs perpendicular to the plane of the drawing. Resilient lugs 22 provide for snap mounting of the switch in an aperture in a panel.