baber/WOPTO huggingface dataset:
Patent GB-1316213-A (GB)
Title: Rear projection system
IPC: G03B21/62
Filed: 1971-07-20
Abstract: 1316213 Projection screens NATIONAL CASH REGISTER CO 20 July 1971 [5 Aug 1970] 33997/71 Heading G2A [Also in Divisions C4 and H4] A rear projection system includes a light source 9, a projector and a screen, the projector being arranged to project on to the screen a focused image of an object 10 disposed between the light source 9 and the projector lens 11 the screen having two transparent parallel plates 1, 2 spaced less than 500 microns apart, the adjacent surfaces of each plate being coated with a transparent electrically conductive film 3, 4 an organic nematic mesomorphic material 5, which scatters transmitted light in response to an electric field above a certain threshold value, filling the space between the plates, and means for applying a voltage across the films 3, 4 so that in use an electric field exceeding the threshold value is established. The nematic material is, inter alia, a 50/50 blend of butyl p(p-et hoxy phenoxy carbonyl) phenyl carbonate and butyl p-et hoxy phenyl terephthalate and includes up to 1 weight per cent of an ion producing material e.g. octoic acid. The voltage applied across the films, which are preferably indium oxide or tin oxide, is between 10 and 300 volts.
Patent GB-1207682-A (GB)
Title: Circular knitting machines
Inventor: LOMBARDI VICTOR JOSEPH
IPC: D04B15/24
Filed: 1967-09-25
Abstract: 1,207,682. Knitting-machines. V. J. LOMBARDI. 25 Sept., 1967 [19 June, 1967], No. 34059/67. Heading D1C. A circular knitting machine has a sinker supporting ring 22 with spaced apart passageways 38 which connect the upper surface of the ring with a vertical surface of the cylinder for the passage of air to remove lint or the like. As shown in Fig. 1 a groove 36 is provided in the upper surface of the sinker ring and passageways 38 lead to a further groove 40. The groove 36 in particular facilitates heat treatment of the ring during manufacture and also prevent overheating during use. In modifications not shown the passageways 38 may be inclined at an angle of 45 to the vertical and may be directed inwardly or outwardly of the needle cylinder. The sinker ring may be formed as a separate unit and may be releasably and adjustably mounted on the needle cylinder. The sinker ring may also be formed as a series of segments which may be individually hardened and adjusted. Oiling channels for the needles may also be provided. In a further embodiment a guard pan may be provided inside the dial and a second one inside the cylinder to collect dust and fluff which have been blown out.
Patent GB-733605-A (GB)
Title: Plasticized polyvinyl chloride
IPC: C09D127/06
Filed: 1953-12-08
Abstract: A synthetic resin composition comprises polyvinyl chloride or a copolymer of vinyl chloride with vinylidene chloride or vinyl acetate, and castor oil maleate.  The composition may be used as a coating for fabrics or as a self-supporting film, the film or coating being preferably deposited from solution in methyl ethyl ketone. Pigments such as titanium dioxide, barytes, zinc oxide, lithopone and antimony oxide may be incorporated.
Patent GB-387468-A (GB)
Title: Motor car licence holder made of metal or other material in three sections
IPC: B60R13/10
Filed: 1931-12-09
Abstract: 387,468. Motor-car licence holders. BERTHOLDT, T. M., 43, Barton Street,. West Kensington, London. Dec. 9, 1931, No. 34180. [Class 73.] A licence holder which is capable of being used for holding the insurance certificate and also for other purposes, such as an ash-tray, comprises three sections forming compartments. The holder comprises two main parts d, i provided respectively with bayonet slots f .and pins j for inter-engagement, the part d being attached to the glass e of the windscreen by adhesive, a ribbed flange b being provided on the part d for this purpose. Attached to the part i is a third part k, which forms a receptacle, such as an ash-tray, access to the interior thereof being provided by an aperture o. The part k is connected to the part i by lugs m engaging holes n. The licence is housed in the base of the part d and is maintained in position by a spring plate h.
Patent GB-414563-A (GB)
Title: Improvements in and relating to electric circuit controlling apparatus
IPC: H01J40/14
Filed: 1933-12-05
Abstract: 414,563. Valve circuits. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Beggs, J. E. ; 1002, Baker Avenue, Schenectady, New York, U.S.A.) Dec. 5, 1933, No. 34196. Convention date, Dec. 8, 1932. [Class 40 (v).] A photo-electric cell 12 is connected to the control grid of e valve 8 which supplies the cell with rectified cur rent. The light falling on the cell 12 controls the current through the valve 8 and therefore the potential of the point 19, which is tied to the cathode of valve 16 whose grid is biassed from resistance 22, so that the potential difference between the grid and cathode of valve 16 is controlled by the cell. At a certain intensity of illumination of the cell the valve 16 will pass current to actuate the relay 17. The position of the cell 12 and resistance 13 may be interchanged, Fig. 2 not shown.
Patent GB-1518014-A (GB)
Title: Method of operating a supercharged internal combustion engine
IPC: F02B37/20
Filed: 1976-08-17
Abstract: 1518014 Supercharged I C engine operation KLOCKNER-HUMBOLDT-DEUTZ A G 17 Aug 1976 [26 Aug 1975] 34255/76 Heading F1B An I.C. engine 1 is associated with a plurality of exhaust gas driven superchargers 2 connected in parallel for both exhaust gas and engine charging air, values 14 being provided upstream of each supercharger turbine 8 to enable the exhaust gas flow to be interrupted and valves 16 being provided downstream of each supercharger compressor 3 to enable the air-flow to be interrupted. In operation the valves 14 are opened as quickly as possible but closed more slowly in order to minimize damage to the supercharger. The opening is arranged to occur at a higher engine speed than the closing. Before starting the engine, a combustion chamber 11 is started and drives only the turbine 8 which is connected to it, the valves 14, 16 associated with the other superchargers being closed. The engine 1 is started when a sufficient supercharging pressure is reached and, when engine speed, exhaust gas temperature, combustion chamber temperature or exhaust gas back-pressure reaches a prescribed value, the valve 14 associated with the next supercharger opens suddenly. When the associated compressor has reached a sufficient speed, the pressure it produces causes non-return valve 16 to open. The number of superchargers connected depends upon the operating conditions of the engine 1. The temperature of the air supplied to the engine is determined by the proportion which is passed through coolers 6 and heat-exchangers 7 by way of slide valves 15.
Patent GB-207395-A (GB)
Title: Improvements in valves for ballast tanks
IPC: B63G8/22
Filed: 1922-12-16
Abstract: 207,395. Blakeborough, R. A., (Larner- Johnson Valve & Engineering Co.). Dec. 16, 1922. Submarine vessels.-A ballast tank for a vessel is provided with a valve mounted in a casing having flaring passages, and operated by fluid pressure. As applied to a submarine vessel, the valve casing 12 is flanged and secured to the hullÀ5, the opening being covered by a screen 16. The inner part of the casing has an annular opening 19 spanned by stays 20, and the top of the casing is provided with a cover 23. The valve 25 has a conical nose 31, and is provided with an annular piston 30 sliding in the part 21. The chambers A, B are connected by pipes a, b with a 4-way cock which may admit seapressure to either space to open or close the valve, or alternatively, compressed air may be used. The streamline form of the interior of the casing and the valve ensures a maximum rate of flow through the valve. A number of such valves may be connected by piping to a single control point, so as to be operated simultaneously.
Patent GB-1280231-A (GB)
Title: Acylaminoacetamidophenyl aryl ketone derivatives
Inventor: MCCAULLY RONALD J
IPC: C07D243/24
Filed: 1969-07-08
Abstract: 1280231 Benzodiazepines AMERICAN HOME PRODUCTS CORP 8 July 1969 [26 Feb 1969] 34376/69 Heading C2C Benzodiazepine derivatives are prepared by the following route The acetic acid and anhydride and acetamide may be replaced by other acids, anhydrides and amides, the thionyl chloride may be replaced by other halogenating agents and the 2-amino-5- chlorobenzophenone may be replaced by other o-aminophenyl aryl ketones, the amino group optionally being monosubstituted.
Patent GB-1188221-A (GB)
Title: Improvements in the Dispensing of Pressurised Liquids
IPC: B65D83/14
Filed: 1968-07-19
Abstract: 1,188,221. Dispensing measured quantities of liquids. RISDON MFG. CO. 19 July, 1968 [19 July, 1967], No. 34433/68. Heading B8N. [Also in Division F1] A pressurized dispensing container is operable upright, inverted or on its side, and has a gravity-operated ball valve 44 which, in the upright position of the container shown, permits liquid flow through valve housing ports 48 to dip tube 30 and the container discharge valve, and in the inverted position of the container, Fig. 2 (not shown), closes ports 48, liquid passing through dip tube 50 and valve housing 32 to dip tube 30. In Fig. 14, the liquid inlet 348 is off-set from the ball valve, and an end wall 346 of the valve housing may be perforated so that the liquid flow moves ball 44 on to its seat 42, and only the quantity of liquid in the dip tubes is discharged, followed by propellant gas which serves to purge the dip tubes and discharge valve. The dip tubes may be flexible and valve housing 32 weighted to ensure liquid discharge when the container is on its side, Fig. 3 (not shown). The two dip tubes may be formed as coaxial or side-by-side passages in a single moulding, Figs. 6 to 13 (not shown).
Patent GB-1443840-A (GB)
Title: Sliding clasp fasteners having stringer tapes of warp- knitted fabric
IPC: A44B19/26
Filed: 1974-08-06
Abstract: 1443840 Slider for a sliding clasp fastener YOSHIDA KOGYO KK 6 Aug 1974 [17 Sept 1973] 34500/74 Heading E2S  A sliding clasp fastener 10 comprises a pair of stringer tapes 11, 11 of warp-knitted fabric each carrying a row of interlockable fastener elements 12 on one surface thereof and a slider 15 which includes a body having a pair of guide channels 20 therethrough for receiving the respective forms of fastener elements and a pair of guide ridges 21 formed on the inside surface of the slider body so as to extend along the respective guide channels, the guide ridges 21 being received in the spacings 14 between the wales 13 formed on the other surface of said stringer tapes in order to assure the correct coupling and uncoupling of said rows of fastener elements as said slider is moved therealong. As shown in Figs. 2, 3 the slider 15 includes top and bottom wings 17, 18 interconnected by a web 19 and guide ridges 21, which are arranged symmetrically about a partition 22 on the inside surface of the bottom wing 18, and which engage in the respective spaces 14 between the wales 13 of each tape 11. In a modification, Fig. 4 (not shown), only one guide ridge (21) is formed on each side of the partition (22). In a concealed-type fastener, Fig. 5, (not shown) the guide ridges (21) are provided on the inside surfaces of the inwardly-projecting portions (23) of the slider body.
Patent GB-863879-A (GB)
Title: Improvements in or relating to non-reciprocal electric coupling devices
IPC: H03H7/00
Filed: 1957-11-06
Abstract: 863,879. Coupling circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 6, 1957 [Nov. 9, 1956], No. 34611/57. Class 40(8) A non-reciprocal electric coupling device comprises two planar windings 1, 2 crossing at right angles and surrounding a common core 3 of high frequency magnetic material such as ferrite which is pre-polarized in a direction parallel to the intersecting line of the planes of the windings, an external electric coupling being provided between the windings, and the pre-polarizing field having a strength such that the high frequency material is in magnetic resonance for a given frequency and the external coupling is purely reactive and has a value such that the coupling factor is nil in one direction for send frequency. If the load impedance Zu is the complex conjugate of the internal impedance of the coupling device, the transmission output is stated to be unity. In the practical embodiment of Figs. 2 and 3 (not shown) coaxial lines are coupled by asymmetrical Lecher lines having a common base on a ferrite core.
Patent GB-1475430-A (GB)
Title: Piston head for sealing and expelling plastic material from an  extrusion press container
IPC: B65D83/00
Filed: 1975-08-20
Abstract: 1475430 Extrusion apparatus ALFRED FISCHBACH KG KUNSTSTOFFSPRITZGUSSWERK 20 Aug 1975 [4 Sept 1974 12 July 1975] 34691/75 Heading F1R [Also in Division F2]  In order to expel a semi-solid substance 6, such as a mastic, cleanly from a container 5, a hollow piston 1 of resilient (preferably plastic) material is provided with integral sealing ribs 3, which are gapped to vent air trapped beneath the piston. The ribs 3 are formed as a multi-start screw thread. Alternatively, annular ribs (13), Fig. 6, (not shown) may be interrupted with staggered gaps (16). In another form, wavy ribs (25), Fig. 9, (not shown) have staggered gaps (26).
Patent GB-1480302-A (GB)
Title: Forage harvester
IPC: A01F29/16
Filed: 1975-08-21
Abstract: 1480302 Forage harvester shear bar assembly JOHN DEERE SA 21 Aug 1975 [13 Sept 1974] 34743/75 Heading A4C A forage harvester chops ready-mown crop A, fed by rolls 24 over a deflectable shear bar 20 to a rotary cutterhead 26, which also delivers the crop rearwardly to an upward discharge chute (not shown). A stone, or the like, trapped between one of the cutterhead knives 34, adjustably positioned by a screw 38, and the shear bar 20 causes downward deflection of the shear bar, together with a portion 43 of the cutterhead housing, thus releasing the stone, the bar 20 either pivoting about a feed-roll axis, Fig. 1, or sliding vertically (not shown). The shear bar is automatically returned to its operative position either by a pair of springs, or hydraulically (not shown), unless there is excess deflection when the bar is held by teeth in a pair of ratchet arms 56 and is only releasable manually.
Patent GB-1516176-A (GB)
Title: Device for braking a counterweight in an x-ray examining apparatus
IPC: G01M1/36
Filed: 1975-08-22
Abstract: 1516176 Automatic speed control PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 22 Aug 1975 [28 Aug 1974] 34928/75 Heading G3R The speed of a counterweight in X-ray apparatus is limited by application of a brake if the detected counterweight speed exceeds a pre-set value. As shown, counterweight 1 is connected to drum 3 whose speed is measured by tachometer 5 e.g. a synchronous motor whose output is rectified and smoothed. The resultant signal, dependent upon the actual counterweight speed, is compared with a desired value formed from a reference 7 and a superimposed delta voltage 10, that is used to reduce counterweight vibrations upon application of braking. If the actual speed is less than the desired value amplifier 8 is blocked, but, if greater, electromagnetic brake 9 is applied to the shaft of drum 3 to limit the counterweight speed. In an alternative, the speed of rollers connected to the counterweight, or an image section of the X-ray apparatus, is measured.
Patent GB-885140-A (GB)
Title: Improvements in or relating to pins for tracked and half tracked vehicles
Inventor: RANDACK FRIEDRICH WILHELM
IPC: C21D9/00
Filed: 1960-10-13
Abstract: 885,140. Endless track vehicles. RANDACK, O. Oct. 13, 1960, No. 35029/60. Class 79(1). [Also in Group XXV] A swivel pin 5 for connecting adjacent links in a tractor track comprises an end portion 6 tapered outwardly towards the end at an angle of about 1 degree, the tapered portion being knurled, the root diameter of the knurling being constant or decreasing towards the end of the pin. The pin has integral domed end striking portions 8 and is passed through a bush 3 and is driven into bearing eyelets 4 of a track link 2 of a pair of adjacent links 1 and 2. A spacing washer 10 is provided.
Patent GB-1443067-A (GB)
Title: Storagestable and thermosetting mixtures
IPC: C08G73/12
Filed: 1973-07-23
Abstract: 1443067 Curable unsaturated bis-imide compositions CIBA-GEIGY AG 23 July 1973 [24 July 1972] 35051/73 Heading C3R A curable mixture comprises (a) a bis-imide where A is a C 2-30  divalent organic radical and B is and (b) an azomethine R-CR<SP>1</SP>=N-R<SP>11</SP>, R-CR<SP>1</SP>=N-A<SP>1</SP>-N=CR<SP>1</SP>-R or where A<SP>1</SP> is a C 2-30  organic radical and the R groups are various defined organic radicals or in the case of R only may be H, R and R<SP>1</SP> may be joined to complete a ring. The mixture may contain 1 to 3 mols. of (a) for each azomethine group in (b). The azomethines may be obtained by reacting an aldehyde or ketone with a mono- or di-amine or a di-aldehyde or diketone with a monoamine. The mixture may include a catalyst, e.g. an organic peroxide a per-salt; and conventional additive, e.g. fillers, plasticizers, pigments, dyes, mould-releasers or flameretardants and may be cured directly at 100‹ to 280‹ C., preferably 150‹ to 250‹ C. or via a partially soluble still thermoplastic prepolymer obtained at 50‹ to 140‹ C. Specified application include lacquers, compression or injection moulding formulations, sintering powders, dipping resins, casting resins, impregnating resins, adhesives and laminating resin. General reference is made to use of the prepolymers in powder form for fluidized bed coating and as a solution or suspension for preparing glass fibre laminates; in all the specific examples cast or pressed mouldings are obtained.
Patent GB-855157-A (GB)
Title: Dimethyl-1, 2-dibromo-2, 2-dichloroethyl phosphate and its application as a multifunctional pesticide
IPC: C07F9/09
Filed: 1958-10-31
Abstract: The invention comprises dimethyl-1,2-dibromo-2,2-dichloroethyl phosphate.  It may be obtained by reacting dimethyl-2,2-dichlorovinyl phosphate with bromine in the presence of an inert aliphatic solvent and under photo-chemical catalysis at from 0 DEG -30 DEG C. while maintaining a free bromine content in the reaction mixture less than about 4% by weight and then stripping volatile materials from the reaction system to recover a low viscosity product which crystallizes to a white crystalline solid. Specified solvents are diethyl ether, acetic acid, chloroform and carbon tetrachloride, the latter being preferred.  In an example bromination is carried out at an average temperature of 12 DEG C. in the presence of carbon tetrachloride in a jacketted Pfaudler kettle equipped with turbine agitator and baffles, light being supplied by two 450 watt quartz mercury vapour light sources operating at about 200 volts within a water cooled immersion well. The product has pesticidal properties (see Group VI).ALSO:A pesticidal composition comprises dimethyl-1, 2-dibromo-2, 2-dichloro-ethyl phosphate (see Group IV(b)) together with an inert solid or liquid carrier or diluent.  The composition may be in the form of a liquid concentrate comprising the active ingredient, an emulsifying agent and a hydrocarbon solvent, e.g. an aromatic hydrocarbon such as xylene or an aliphatic hydrocarbon of high unsuphonatable residue, or it may be in the form of a wettable powder or dust.
Patent GB-1359795-A (GB)
Title: Jib truck and pulley arrangement for cranes
IPC: B66D3/04
Filed: 1972-07-26
Abstract: 1359795 Truck and pulley arrangements for jib cranes POTAIN 26 July 1972 [26 July 1971] 35103/72 Heading B8B A jib truck and pulley-block arrangement comprises a front truck 5 and a rear truck 4 running on jib track 3. A rear lower pulleyblock 6 is suspended from the rear truck 4 and a front lower pulley-block 7 is suspended from the front truck 5. The front truck 5 is attached at 28 to a truck cable 29 and, with the two trucks 4, 5 latched together as shown they move as a unit. A load cable 8 passes from the rear of the jib over, in succession, front pulley 9 on truck 4, pulley 10 on pulley-block 6, rear pulley 11 on truck 4, front pulley 12 on truck 5, pulleys 13, 14 on pulley-block 7 and rear pulley 15 on truck 5 to be secured to the head of the jib (not shown). A load hook 36 is suspended on a lever 33 pivoted at 34 on the pulley-block 7 and shown hooked on to the block 6 at 39. In this arrangement there is a double tackle between the jib and the load hook 36. The trucks 4, 5 may be separated and the truck 4 latched to the jib adjacent its rear end, (Fig. 1, not shown), with the lever 33 disengaged from the pulley-block 6, Fig. 6 (not shown), this arrangement providing a single tackle between jib and load hook 36. The coupling and uncoupling of the trucks 4, 5 is arranged to be carried out by use of the load cable 8 after the trucks have been correctly positioned by the cable 29. Loads of great length may be handled in a modification illustrated in Fig. 8 (not shown) wherein the trucks 4, 5 are spaced by crosspieces (48), a lifting hook (46) on pulley block 6 and the lifting hook 36 on pulley block 7 being interconnected by a swing-bar (49).
Patent GB-1076986-A (GB)
Title: Ferrite core and method of manufacture thereof
IPC: C04B35/26
Filed: 1964-08-27
Abstract: 1,076,986. Magnetic compositions. RADIO CORPORATION OF AMERICA. Aug. 27, 1964 [Aug. 28, 1963], No. 35220/64. Addition to 989,389. Heading H1H. Ferrite cores similar to those described in Specification 989,389 are made by a similar process except that the sintering atmosphere is oxygen or oxygen containing no more than 10% of an inert gas.
Patent GB-491007-A (GB)
Title: Improvements in vitamin products
IPC: C07C401/00
Filed: 1936-12-23
Abstract: Natural vitamin D and synthetic antirachitic provitamins are stabilized by reacting with a halide or anhydride of an unsaturated fatty acid of at least 6 carbon atoms whereby unsaturated esters of superior therapeutic value are obtained. Suitable synthetic provitamins are irradiation products of D -5-6-cholestadiene-3-ol or its substitution products such as 7-dehydrostigmasterol, 7-dehydro-sitosterol 7-dehydro-brassicasterol and 7-dehydrocholesterol.  The unsaturated ester may be produced from the synthetic substance before or after irradiation.  In the former case the ester such as dehydro-cholesteryl linoleate may be irradiated in benzene with a magnesium arc, the benzene removed by vacuum distillation, and unreacted sterol ester precipitated with digitoxin. Esterification catalysts may be employed, such as pyridine in the case of using an acyl halide.  In examples: (1) 7-dehydro-cholesterol in benzene is treated with linoleyl chloride in pyridine; (2) vitamin D from cod liver oil in pyridine is treated with linoleyl chloride in pyridine.  Oleic and linolenic esters may be made similarly. 7-Dehydrosterols may be made by oxidizing cholesteryl acetate with chromic acid, to introduce a keto group in the 7 position, reducing the keto group to an alcoholic group, saponifying to remove the acetyl group, and treating the dibenzoate of the alcohol by heating to remove benzoic acid from the 7 position and saponifying to remove the other benzoyl group.  The other 7-dehydro-sterols may be prepared similarly.  The Provisional Specification includes the production of ethers of the vitamin substances, and esters of saturated higher fatty acids, and includes examples of the esterification of calciferol and 7-dehydro-cholesterol respectively with palmityl chloride.