baber/WOPTO huggingface dataset:
Patent GB-468188-A (GB)
Title: Manufacture of oxybenzofluorenones
IPC: C07C49/82
Filed: 1936-11-26
Abstract: Oxybenzofluorenones are made by condensing an oxynaphthylphenyl ketone of the general formula <FORM:0468188/IV/1> wherein X stands for a hydrogen atom, with an acid condensing agent.  The products dissolve in caustic alkali to a red-violet solution, preferably in presence of an auxiliary such as turkey-red oil, react with diazo compounds to give azo-dyes, and their alkali salts have affinity for cellulose fibres.  Thus 1-oxy-3:4-benzofluorenone may be coupled on the fibre with diazotized 4.4<1>-dichlor-2-aminodiphenyl ether to yield a bordeaux tent and with diazotized 4-amino-3-methoxy-azobenzene or 4-amino-3-methoxy-6-methyl-4<1>-chlorazobenzene to give a fast black shade.  In examples, 2-oxynaphthalene-3-phenyl ketone or its 4<1>-methyl derivative is melted with aluminium chloride.  The oxynaphthylphenylketones used as starting materials are made by condensing a halide of 2.3-oxynaphthoic acid with benzene or a derivative.
Patent GB-266846-A (GB)
Title: Improvements in or relating to even balance self-indicating weighing scales
IPC: G01G1/00
Filed: 1925-12-23
Abstract: 266,846. White, A. E., (Dayton Scale Co.). Dec. 23, 1925. Bolts.-To prevent unauthorized opening of a casing each securing bolt 30 has a rigid head 74, Figs. 7 and 8, of triangular or other unusual shape and an auxiliary corresponding head 78 which is free to rotate idly. Being housed in a deep countersink 80 the head 74 can only be turned by a special tool adapted to pass the loose head 78 and grip the fixed head 74.
Patent GB-631090-A (GB)
Title: Improvements in or relating to pencil sharpeners
IPC: B43L23/06
Filed: 1947-12-09
Abstract: 631,090. Pencil sharpeners. JACK, J. Dec. 9, 1947, No. 32474. [Class 146 (iii)] The cutting blade 3 of a pencil-sharpener is mounted transversely between the ends of a U-shaped sheet metal fra'me 2, the end portions of the arms 1 of which are folded over upon the blade and locate it with its inner edge in firm engagement with abutments on the arms. The abutments may be longitudinal ribs 4 or short transverse ribs, pressed up from the metal of the arms 1, or transverse shoulders formed in the said metal, and the blade may be pressed during the folding operation into biting engagement with the metal of the abutments or received by undercut faces thereof. The abutments may be formed of inturned extremities of the folded over arm portions embracing the edge of the blade.
Patent GB-1142227-A (GB)
Title: Urethane derivatives of dihydropyran and polymerisation thereof
Inventor: GAZZARD EDWARD GEORGE
IPC: C08F24/00
Filed: 1966-07-08
Abstract: 1,142,227. Urethane derivatives of dihydropyran and process for their preparation. IMPERIAL CHEMICAL INDUSTRIES Ltd. 30 June, 1967 [8 July, 1966], No. 32490/68. Divided out of 1,142,225. Heading C2C. [Also in Division C3] Compounds of the formula wherein R<SP>1</SP> and R<SP>2</SP> represent hydrogen atoms, C 1-4  alkyl groups or halogen atoms and R<SP>3</SP> represents the residue of a hydroxylic compound R<SP>3</SP>OH may be obtained by heating the corresponding isocyanate with the hydroxyl compound R<SP>3</SP>0H, optionally in the presence of a basic catalyst. In specific examples compounds are prepared in which R<SP>1</SP> and R<SP>2</SP> represent hydrogen and R<SP>3</SP> represents methyl or phenyl.
Patent GB-1175635-A (GB)
Title: A method and apparatus for Separating Solvent from a Mixture of Polymerizate and Solvent
IPC: B29C48/38
Filed: 1968-07-08
Abstract: 1,175,635. Polymerizates, recovery of solvent from. WERNER & PFLEIDERER. 8 July, 1968 [19 Aug., 1967], No. 32534/68. Heading B1B. Solvent is removed from a hot mixture of polymerizate and solvent by injecting the mixture under pressure through an opening 5 between the ends of casing 2 wherein decompression and substantial vaporization of solvent occurs and foam is formed; the foam is broken by rotating intercalating screws 1, the solvent vapour flows through jacketed cooled zone 17 and condensate is withdrawn at outlet 3, while the polymerizate is conveyed with recompression in the opposite direction and is reheated by heating jacket 4. The screws are provided, downstream of opening 5, with flights 6 which have a vapour conveying action contrary to the direction of the feed. Kneading elements 7 assist in raising the polymerization mass to the required temperature. The polymerizate, which leaves the left-hand end of the casing, still contains solvent and it is passed through throttle 8 into a second stage connected by openings 13, 13<SP>1</SP>, 13<SP>11</SP> to a vacuum pump. Solvent condensate is withdrawn at outlet 14; and desolventized polymerizate leaves the apparatus through exit 15.
Patent GB-653295-A (GB)
Title: Improvements in and relating to rotary compressors and/or vacuum pumps and the like
IPC: F04C29/04
Filed: 1948-12-16
Abstract: 653,295. Rotary compressors or pumps. BIRD MANUFACTURING CO., Ltd., and BIRD, P. C. Dec. 16, 1948, No. 32572. [Class 110(ii)] In a compressor or pump of the outwardly-sliding vane type, oil under pressure is used to force out the vanes 56 in their slots, and to seep past the vanes to lubricate and seal the working chamber 40 between the high and low pressure parts. Springs may also be used in the rotor slots. Oil is also sprayed into the working chamber from ducts 78, 79 in one or both end covers 42, 44. An arcuate portion 36, of the casing bore, fits closely to the periphery of the rotor 38. Compressed air is delivered into a separator 18 where the oil is separated out and returned to the compressor under delivery pressure or by means of a separate pump. The unit comprising compressor, driving motor and separator, may be mounted on a trolley. The oil outlet pipe 24 leads to a coil 26, surrounding a cooling fan, before the oil is returned to the working chamber. Cooling channels 12 are provided, or other cooling means may be used. Inlet and outlet ports 50, 52 are arranged in one or both end covers, the inlet having a filter and a non-return valve to prevent oil being forced back through the intake when the compressor is stopped. Arcuate slots 45 are formed at intervals along the casing communicating with a bore 43 which is open to the delivery, this allowing the last two cells of the compressor to be at the same pressure to avoid pulsations. In the case of an exhauster, the outlet port will be increased so as to be 30 degrees from the central radius of the arc 36. One or more oil seals 51, 53 may be provided on the driving shaft, with a drain hole in between. Distributing passages 70 are arranged in a member 68 to supply oil to the base slots. A tapered V-shaped groove 80 is cut obliquely in each end cover to provide oil for sealing purposes. A number of compressors may be arranged in series or in parallel and may be driven by electric motors, internal-combustion engines using toothed gearing or belt drives. The air delivery pipe 22 may incorporate a cooler. The vanes may be of metal, plastic material or fibre.
Patent GB-857490-A (GB)
Title: Improvements in windscreen cleaner operating systems
Inventor: OISHEI JOHN ROFFO
IPC: B60S1/48
Filed: 1956-10-25
Abstract: 857,490. Windscreen cleaning systems. TRICO PRODUCTS CORPORATION. Oct. 25, 1956, No. 32592/56. Addition to 801,434. Class 138(1). A windscreen cleaning system comprises a wiper unit 11, Fig. 1, which includes a motor and a control for starting and stopping the motor, a washer having a pump 14 with a pedal 86 having an ejection stroke and a self-return stroke, a reservoir 26 which receives liquid on the ejection stroke and which includes a pressureresponsive member 28 which starts or accelerates the wiper motor, and means 61, Fig. 4, which retards drainage of liquid from chamber 26 and so maintains the wiper motor in operation after completion of the self-return stroke of pedal 86. Depression of pedal 86 compresses bulb 84 driving liquid along hose 68 to valve 77 in valve housing 28, Fig. 4, and thence through chamber 76, passage 78 and hose 81 to nozzles 82 from which it emerges on to the windscreen. Liquid is also forced through passage 63 past a non-return disc valve 62 into chamber 61 so as to raise diaphragm 58 and thus valve disc 37 which uncovers a port at the end of passage 41 connected to hose 43 which is itself connected to the inlet manifold of the vehicle engine. Suction is thus applied to chamber 36 which connects with hose 24, connected to co-ordinator motor 12, through passage 46, thus starting the wiper motor valve in motor 12, or accelerating the wiper motor to full speed if manual control 18 is already set at slow speed. Stem 56 is also raised by diaphragm 58 and enters a resilient sleeve 53 which co-operates with said stem to act as a non-return valve permitting air to be withdrawn from hose 24 but not permitting it to return if suction in hose 43 declines owing to opening of the engine throttle. When pedal 86 is released, bulb 84 expands and draws in liquid from reservoir 26. Pressure in passage 63 thus drops and valve 62 closes, but liquid is permitted to escape from chamber 61 at a controlled rate past a needle valve. Consequently stem 56 moves downwardly and disengages from sleeve 53, and atmospheric air flows via vent 65, space 59 above diaphragm 58 and clearance 60, into chamber 36 and thus through passage 46 to hose 24 or stop or decelerate the wiper motor. In an alternative embodiment, Figs. 6-9 (not shown), the wiper motor is electrically operated, the stem in its lowest position separating two contact fingers and in its raised position allowing contact to be made. Specifications 734,659, 801,435 and 849,908 are referred to. Reference has been directed by the Comptroller to Specification 736,380.
Patent GB-650609-A (GB)
Title: Improvements in or relating to the processing of thermo-setting plastic material andapparatus therefor
Inventor: HEDIN CARL ERIK
IPC: B29B13/02
Filed: 1948-12-16
Abstract: 650,609. Ovens for heating plastic material; electric heating. HEDIN, Ltd.. HEDIN, C. E., and BRITISH MOULDED PLASTICS, Ltd. Dec. 16, 1948, No. 32632. [Classes 39(iii) and 126] [Also in Group XII] In an oven for heat-treating thermosetting plastic prior to moulding steam is superheated by being directed on to a heated plate in the heating space and is then caused to permeate the charge in the oven. An oven chamber 1 is formed from sheet metal walls 2 and a back casting 3 lagged by insulating material 4 enclosed in a body casting 5 having front and rear covers 7, 8. A slidable tray 16 having a front wall 17 to close the oven chamber 1 is provided with a metal gauze shelf 19 for supporting the thermosetting plastic. Steam is supplied to the oven 1 through a tube 13 having nozzles 14 which direct it on to the bottom 2 at the oven where it is superheated by an electrically heated element 10. A second electrically heated element 15 may be provided above the top wall 2 of the oven 1. When the slidable tray 16 is in position in the oven 1 steam permeates the charge of thermosetting plastic which is in powder or pellet form. A control box 20 is mounted on cast bosses 21 above the oven.
Patent GB-1373297-A (GB)
Title: Preparation of sulphonate detergent materials
IPC: C07C303/32
Filed: 1972-07-12
Abstract: 1373297 Sulphonates UNILEVER Ltd 10 July 1973 [12 July 1972] 32652/72 Heading C2C A mixture of alkane and olefine sulphonates is obtained by first incompletely sulphonating a C 6-20  α-olefin and then subjecting the residue to a sulphitation process, optionally after addition of further olefin which may be of different chain length from that originally used. The products are used to make detergent bars.
Patent GB-786547-A (GB)
Title: Stabilizing levulinic acid during heating
IPC: C07C51/50
Filed: 1955-11-16
Abstract: <PICT:0786547/III/1> Lactone formation is minimized during the removal of a non-aqueous solvent from a solution of levulinic acid by fractional distillation by maintaining a small quantity of water in the still at all times.  The levulinic acid product does not darken on storage.  The process is particularly applicable in the distillation of solutions of levulinic acid obtained by solvent extraction of the products of the acid decomposition of hexose-yielding material.  Solvents referred to are methylene chloride, furfural, butanol, and methyl isobutyl ketone.  In an example, a solution containing levulinic acid (6 parts by weight), methyl isobutyl ketone (13 parts) and tar (1 part) was heated, in preheater 6, to 93 DEG  C.; and was introduced into the midpoint of column 2 at the rate of 60 pounds per hour.  Column 2, which was 20 feet high and was packed with Raschig rings, was maintained under an absolute pressure of 45 mm. Hg; and the liquid in the base was heated to 165 DEG  C. by steam-coil 8.  Water was introduced through line 10 into the base of the column at the rate of 20 c.c. per minute. Ketone and water, together with a small amount of levulinic acid, were distilled off at a reflux ratio of about 1.8 to 1; the condensate for withdrawal being collected in separation chamber 22. Bottoms containing 84 per cent levulinic acid and 1.5 per cent water were withdrawn from the column by pump 16, and discharged into tank 14.  This liquid was then passed through pressure-reduction valve 27 into heater 28, where it was heated to 146 DEG  C., and was then introduced into flash-tower 30, which was maintained at an absolute pressure of 11 mm. Hg and a temperature of 177 DEG  C.  The flash-off vapours were condensed in condenser 32 and collected in accumulator 36.  This product contained 96.7 per cent levulinic acid, 2.2 per cent water and 1.4 per cent lactones; and it was very stable against decolorizing upon storage.  The residual liquid from tower 30 was collected in accumulator 44; and was processed for levulinic acid recovery.  Lactone formation may be minimized during the esterification of levulinic acid by adding a small quantity of water to the reaction mixture.
Patent GB-734337-A (GB)
Title: Fluid pressure braking system for motor vehicles
IPC: B60T8/24
Filed: 1953-11-26
Abstract: 734,337. Steering vehicles by braking. GALLAY, R. Nov. 26, 1953 [April 17, 1953], No. 32800/53. Class 79(2). [Also in Group XXXIV] In a device for producing differential braking action of a motor vehicle, at least one pair of master cylinders 3 and 4 are secured in parallel relation to each other on a slide 1 mounted for sliding movements normally to the axes of the pair, one cylinder feeding pressure fluid to the brakes of at least one right ground wheel of the vehicle, and the other cylinder feeding pressure fluid to the brakes of at least one left ground wheel of the vehicle, the piston rods of both master cylinders being mechanically connected to one another by means of a link 23 which is hinged by its one end to one piston rod and connected at its other end to the other piston rod by means of a slideway 25, the link 23 being operatively connected with the braking pedal lever 27 at a point situated between. the connected ends of the link and the whole being arranged so as to produce on the wheels a differential braking action which is a function of the displacement of the slide 1 under the action of an external force. The external force may be centrifugal force to which the vehicle is submitted on curves, the centrifugal force operating the slide either directly or through the medium of a pendulum 15, 16 as illustrated in Fig. 1 to position the link 23 with relation to the braking pedal lever 27. Fig. 6 illustrates a modification of the invention in which the slide 51 moves directly under the action of a control screw operated by the movements of the steering wheel. The slide is adapted to move in a direction normal to the axes of the master cylinders 52, 53 which are secured to the slide. Displacement of the slide 51 on the base plate 57 can be obtained by means of a screw 58 operated by movements of the steering wheel. The master cylinders 52, 53 are associated with pistons, the rods 59, 60 of which are mechanically connected to each other by a link 61 and operated by the brake pedal lever 65, as described with reference to Fig. 1.
Patent GB-800824-A (GB)
Title: Transportation of liquids
IPC: B60P3/24
Filed: 1955-11-17
Abstract: 800,824. Diaphragm tanks. ALEXANDER, D. J., and BRITISH PETROLEUM CO., Ltd. Nov. 16, 1956 [Nov. 17, 1955], No. 32974/55. Class 69 (1). A tank 10, suitable for the transporation of liquids, is fitted with resilient pads 15 and 16 to absorb shocks produced by longitudinal movement of the liquid, and is divided into two compartments by a diaphragm 12, shaped to conform to the internal shape of the tank and formed of a flexible impervious material. The diaphragm is attached at 11 to the internal wall of the tank 10 in such a manner that it is free, under the pressure of liquid when the tank is filled, to take up a position with either side in contact with the wall of the tank. The compartments are fitted with inlets 13 and 19 and outlets 14 and 20, arranged on opposite sides of the diaphragm, so that one side or the other of the diaphragm will provide, in conjunction with the opposite end of the tank, a closed compartment. The Provisional Specification also describes a vertical tank in which the diaphragm is secured to the internal wall of the tank at a point mid-way between the upper and lower ends of the tank which can be charged either through an inlet at the top or at the bottom of the tank. Alternatively, the diaphragm may be secured to the end plates along two corresponding diameters and to the sides of the tank along the vertical lines connecting the diametrical lines. When applied to a tank, part of which is divided off by a partition to provide a heating chamber, the diaphragm is attached to the tank wall at a point midway between the end of the tank and the partition wall.
Patent GB-890011-A (GB)
Title: Improved winch
IPC: B66D1/14
Filed: 1957-10-23
Abstract: 890,011. Winches for tractors. HESFORD & CO. Ltd., C. M., and THOMAS, E. H. Oct. 22, 1958 [Oct. 23, 1957], No. 33017/57. Class 78 (5). The drive from the power take-off 15 of tractor 16 is transmitted to a winch drum through worm 11, worm-wheel 18, and shaft 19, to which shaft the winch drum is secured. Shaft 19 is journalled eccentrically in and between discs 20 rotatably mounted in casing 12. Accordingly when the operator moves the handle 22 (not shown), clockwise, worm-wheel 18 moves from position A (as shown) of engagement to position B (not shown), of disengagement and then to position C (not shown), of disengagement with brake applied, the flange of the drum engaging a brake. The handle is maintained in any one of these three positions by spring pressure. This spring pressure also acts as a stress-limiting device for the drum cable since upon excess of tension, the handle swings over clockwise against the spring pressure to position C where the brake is applied. A frangible pin may be incorporated in the input shaft 13 to break on overload.
Patent GB-215037-A (GB)
Title: Improvements in or connected with the tappet actions of valves for internal combustion engines
IPC: F01L1/12
Filed: 1922-12-06
Abstract: 215,037. Desborough, F. R. Dec. 6, 1922. Cam mechanism. - Clearance between the cam and tappet or lever of the valve gear of an internal-combustion engine, is automatically taken up by means of an eccentric member 9 mounted loosely on a pin 10 provided on the tappet 6, Fig. 1, or lever 17, Fig. 5, and surrounded by a loose ring 11 mounted on ball bearings. When the cam begins to exert a lifting-force, the eccentric 9 is turned from the position shown until its narrowest portion comes between the pin 10 and the cam 12, Fig. 1, or rod 18, Fig. 5, after which the tappet or lever is moved to open the valve. As the cam recedes, the eccentric is returned to the position shown by a spring 13. In a modification of the form shown in Fig. 5, the loose ring 11 is omitted, and the cam acts directly on the eccentric 9. To ensure constant contact between the end 8 of the tappet and the valve stem, a wire connection 15 is provided as shown in Fig. 1.
Patent GB-927051-A (GB)
Title: Improvements in or relating to antennas for high frequencies
IPC: H01Q5/357
Filed: 1960-09-28
Abstract: 927,051. Aerials. R. GUERTLER. Sept. 28, 1960 [Oct. 7, 1959], No. 33323/60. Class 40 (7). An aerial is formed of a plurality of dipoles of various lengths which are connected at their centres and their ends to form a meandering conductor. Figs. 1 and 3 illustrate examples of such aerials. The aerial is fed at A, B and operates over one or more wide frequency bands. If A, B are shorted, the invention acts as a reflector. In one embodiment, Fig. 4, dipoles 5, 6 and 7, 8 are of equal length, three times that of dipoles 1, 2 and 3, 4. The dipoles are interconnected as shown. At a frequency 3f at which the dipole 1, 2 is a half wavelength, dipoles 1, 2 and 3, 4 act as a folded half-wave dipole and dipoles 5, 6 and 7, 8 as a folded three half-wave dipole. At frequency f, the long dipoles act as one folded half-wave dipole and the short dipoles act as stubs, loading the aerial inductively at the feed-point. The spacing of the dipoles is about one-tenth of a wavelength at the highest operating frequency. Rod or screen reflectors are used to increase gain and directivity, these factors are also increased by using two aerials, Figs. 9 and 10 (not shown). The reflector elements may each be divided by means of insulators into a number of parts, each a half-wave long at the highest frequency used. The capacitance that is introduced by the aerial mounting arrangements may be reduced by placing a conductor to join the centre points of rods 13, 24, Fig. 4. The conductor may be insulated therefrom.
Patent GB-476842-A (GB)
Title: Apparatus for measuring the work done by impact members
IPC: G01N3/30
Filed: 1936-12-04
Abstract: 476,842. Dynamometers. SOC. ANON. DES HAUTS-FOURNEAUX DE LA CHIERS. Dec. 4, 1936, No. 33363. Convention date, April 17. [Class 106 (ii)] The work done by an impact member is obtained by measuring the work done by an inertia member carried by the impact member and having the same speed as that member before impact, against the influence of a calibrated spring which it engages throughout its movement. The impact member M has screwed into it a tube 1 housing a spring 4 on which rests the inertia member m guided by a pin 3 engaging in a longitudinal slot 2 in the walls of the tube. Heel pieces 5 are welded to the tube at each side of the slot 2 in which slots are provided through which is passed a sheet of thick paper which is engaged by a tracer 9 carried by the member m and pressed out from it by a light spring 10. The tube is closed at the top by a screw cap 11. The impact member M is dropped from a predetermined height, say to test a rail supported at each end. On impact, the member M is arrested but the member m continues and compresses the spring by an amount traced on the paper. The work absorbed by the rail is shown to have a parabolic relation with the distance the spring has been compressed.
Patent GB-1469917-A (GB)
Title: Machine for the transverse folding of dough band sections
IPC: A21C9/08
Filed: 1975-08-11
Abstract: 1469917 Dough laminating SEEWER AG MASCHINENFABRIK 11 Aug 1975 [17 Aug 1974] 33386/75 Heading B5A A machine for laminating dough sheets comprises at least three conveyers; a first conveyer 8 which is adapted always to convey in the same direction; a second, reversible conveyer 9 so arranged as to leave a gap between it and conveyer 8; and a third, also reversible conveyer 13 arranged below the first and second conveyers. The operation of the machine is illustrated by Figs. 7b-7g in which arrows indicate the direction of motion of the conveyers; in this embodiment, conveyers 8 and 9 are pivotably mounted about their driving rollers which are the rollers further from the gap, so that the conveyers can adopt a greater downward inclination in stages c-f than in the remainder of the operation.