baber/WOPTO huggingface dataset:
Patent GB-805888-A (GB)
Title: Improvements in preparation of acetylacetone
Filed: 1957-09-27
Abstract: Acetylacetone is prepared from a reaction product containing its sodium salt by acidification with organic acid or carbonic acid to progressively decreasing pH values in successive stages to liberate only a part of the acetylacetone in each stage prior to the last, and recovering the liberated acetylacetone after each stage.  Organic acids specified are acetic and formic. Different acids may be used in different stages.  In a preferred embodiment, sodium salt of acetylacetone in crude reaction product, usually from the condensation of acetone and a lower alkyl ester in the presence of metallic sodium or other basic acylation catalyst, is dissolved in water and the organic layer discarded.  The aqueous layer is acidified to pH 6.5-7.0 with acetic acid and the liberated acetylacetone separated.  Further pure acetylacetone is obtained by solvent extraction, e.g. with ethyl or isopropyl acetate.  Addition of more acetic acid to lower the pH by 0.3 to 0.7 units, but not below 6.0, followed by solvent extraction, yields more pure acetylacetone, but it is preferred economically to reduce the pH to 5.7 \sB 0.1 to liberate all the remaining acetylacetone, followed by extraction to yield acetylacetone contaminated with acetic acid, which may be used in the treatment of a subsequent batch of sodium salt.  In an example, a suspension of sodium in xylene containing aluminium octoate is prepared and used for the condensation of methyl acetate and acetone; pure acetylacetone is obtained from the reaction product by acidification of an aqueous solution to pH 6.7 \sB 0.1 with acetic acid and extraction with ethyl acetate; by further acidification to pH 5.6, more acetylacetone, but contaminated with acetic acid is obtained.
Patent GB-245743-A (GB)
Title: Improvements in and relating to metal sheet piling
IPC: E02D5/04
Filed: 1925-12-02
Abstract: 245,743. Pahl, K. Jan. 7, 1925, [Convention date]. Piling. - In interlocking sheet piling a rigid locking joint is so made as to provide approximately only linear contact with intervening recesses such that under no circumstances can plane or surface contact occur. The joints are formed with recessed walls, whereby cavities a. b, c are thus produced, and contact occurs only at the points d, e, f, g. The cavities become filled with silt, &c., and so form a watertight joint. Piling of this form may be made of lighter section than that commonly used, but of steel of increased strength and higher elongation limit, such as steel containing from 0.25 to 0.30 per cent of carbon, 0.7 to 0.8 per cent of manganese and traces of silicon.
Patent GB-519393-A (GB)
Title: Appliance for use in reversing flexible cylindrical articles
IPC: D06G3/02
Filed: 1938-10-21
Abstract: 519,393. Turning trouser legs. GREENWOOD, N., and GREENWOOD, S. Oct. 21, 1938, No. 30462. [Class 112] The end of an arm, which may be a pressing- board, is fitted with outwardly-pressed hinged pieces L, Fig. 5, and a guide block B. A trouser leg is pulled over the contrivance until the bottom of the leg has passed the shoulder P and is then reversed in being pulled backwards. The parts L may be shaped so as to dispense with the block B. In the form shown in Fig. 1, outwardlypressed hinged pieces B co-act with hinged pieces L.
Patent GB-245745-A (GB)
Title: A method of and apparatus for bleaching fatty oils, mineral oils and the like
IPC: C11B3/10
Filed: 1925-12-02
Abstract: 245,745. Bollmann, H., Jan. 6. 1925, [Convention date]. Mineral and fatty oils, purifying. - In the bleaching of mineral or fatty oils or the like by bleaching earth the oil and earth are brought into intimate contact in small quantities at a time and in the proportions requisite for bleaching. In the device shown oil is injected by sprayers 4 into a closed jacketed vessel 1, while earth from a pipe 6 is distributed by a cone 9 rotated by the shaft 10 of an agitator 3. The mixture passes through an outlet 11 to a closed pipe 12 provided with an agitator 15. The oil is withdrawn through cocks 13. The earth is fed through a heated tube 14, and is blown on to the cone 9 by air forced by a pump 8 into a jacket 7 surrounding the perforated lower portion of the pipe 6. The air returns to the pump through a pipe P.
Patent GB-335396-A (GB)
Title: Improvements in folding cabinets
IPC: A47B43/02
Filed: 1929-10-08
Abstract: 335,396. Betjemann & Sons, Ltd., G., and Andrew, H. V. Oct. 8, 1929. Cabinets.-A folding cabinet consists of a rear section, two side sections hinged thereto, and a lid portion adapted to cover the whole when closed. Figs. 1 and 2 show a folding cabinet consisting of a back 2 and side parts 3 between which are arranged shelves 4. Hinged at the sides are rectangular side sections 6 supported by wheels 11 and moving about hinges 5 so that they can be folded inwards over the front of the central section 1, or folded outwards, as shown, to afford access to the drawers 7. When the cabinet is to be closed, the shelf 15 is folded down about its hinges 14, the sections 6 are folded in, and the top 19 is folded down about its hinges 20. The top 19 contains a mirror 21 protected by doors 22 with mirrors on their inner sides. The tops of the parts 6, 15 are glazed, and have recesses for various articles.
Patent GB-658963-A (GB)
Title: Thread gauging instruments
IPC: G01B5/10
Filed: 1947-11-18
Abstract: 658,963. Testing threads; tension arrangements. GUIMBRETIERE, L..F., and SOREZ, E. J. Nov. 18, 1947, No. 30604. Convention date, Nov. 25, 1946. [Classes 120(ii) and 120(iii)] [Also in Group XIX] Apparatus for continuously gauging a thread comprises a narrow channel filled with mercury or other non-wetting liquid, means for driving the thread obliquely through the liquid surface in the longitudinal plane of symmetry of the channel and means for detecting variations in the liquid level at the point where the thread passes through the surface. The surface tension of the mercury produces an almost vertical liquid face, Fig. 7, in the vicinity of the thread, which advances or recedes as the thickness of the thread, and hence the width of the narrow spaces between the thread and the sides -of the channel varies: This liquid face may reflect a'beam of light which is focussed onto a moving photographic film to produce a record of the varying thickness. The mercury is continuously replenished to remove impurities and, as it flows past the thread a drop in the general level within the channel occurs, so that in an alternative recording arrangement, Fig. 10, electric contacts may be arranged in a horizontal line to be engaged by the upper surface only. Those contacted by the mercury complete circuits throughcorresponding solenoids arranged to act, through a system of links, on a recording arm. In a further arrangement, the solenoids are replaced by electrically-operated counters each of which is adapted to register the number of points along the thread at which the thickness falls within corresponding limits. The length of the variations in thickness may be taken into account by periodically breaking the circuit through the counters. The figures so obtained may be used to construct a frequency curve showing the number of points along the thread having given thickness, or a representation of such a. curve may be constructed by replacing the counters by ballreleasing means respectively associated with adjacent vertical chambers. Instead of counting the pulses, they may be recorded electro-chemically on a moving recording-material. In order to maintain a constant tension on the thread, the latter is arranged, as it is drawn through the mercury, to rotate a copper disc between the poles of permanent or electromagnets.
Patent GB-379144-A (GB)
Title: Improvements in opening tops for road vehicles
IPC: B60J7/14
Filed: 1931-11-05
Abstract: 379,144. Road vehicle opening tops. HYSLOP, J. F., Dromore, Majors Loan, Falkirk, Stirlingshire. Nov. 5, 1931, No. 30639. [Class 108 (i).] In vehicle opening tops of the kind comprising hingedly connected sections the sections comprise forward and rear sections 1, 2 hinged about a transverse axis 3, the front section being provided with runners 4 at its forward part adapted to run in guides 5 on the vehicle top while the rear of the rear section is pivoted to a slide 6 at the top of a vertical recess 7 into which the forward and rear sections are lowered when folded.
Patent GB-1254795-A (GB)
Title: Electrical connector assembly
IPC: H01L21/60
Filed: 1969-06-18
Abstract: 1,254,795. Semi-conductor devices. INTERNATIONAL BUSINESS MACHINES CORP. 18 June, 1969 [5 July, 1968], No. 30734/69. Heading H1K. A connector assembly consists of a substrate of semi-conductor material of one conductivity type having layers of insulating material on its opposed faces with aligned apertures therein between which extend diffused regions of the opposite conductivity type providing junction isolated connections between contacts on the opposed faces. Typically the substrate is a wafer of silicon with an oxide coating in which the apertures have been produced by standard photoresist and etching steps. Prior to the diffusion step the semi-conductor may be thinned between the aligned holes by etching. After diffusion a conductive pattern having terminations at the apertures are deposited on the oxide layers. The completed assembly 11, the undiffused part of which may be used as a power supply bus-bar, is sandwiched between one or more pairs of passivated silicon integrated circuit chips 12, 13 (Fig. 1), electrical contacts being made to desired points on the chips through solder reflow members which are held in place with adhesive prior to fusion. Finally one or more of the composite assemblies is mounted as shown on recessed ceramic base 36, with terminal portions of the conductive pattern on one face of the connector assembly in register with contacts 38 on the base to which they are soldered at such a temperature that the previously soldered joints remain intact.
Patent GB-448328-A (GB)
Title: Improvements in the electrolytic production of lead
IPC: C25C3/34
Filed: 1934-11-05
Abstract: 448,328. Electrolytic production of lead and sulphur. NATIONAL PROCESSES, Ltd., 95, Gresham Street, London, and GIBSON, A. R., 2, Oakland Road, Redland, and ROBSON, S., Penpole House, Shirehampton, both in Bristol. Nov. 5, 1934, No. 30845/33. [Class 41] Lead and sulphur vapour are obtained by electrolysis of fused lead chloride containing 1-10 per cent of lead sulphide added in the form of galena or other material, with a current density between 500 and 1,000 amps per sq. ft. As the sulphide concentration is increased within the specified limits, the current density must be correspondingly increased to maintain a constant flow of sulphur vapour from the neighbourhood of the anode ; otherwise normal electrolysis may be suspended owing to the formation of lead di- or polysulphide. By maintenance of the specified conditions formation of sulphur chloride is also avoided. For a sulphide concentration of 3-5 per cent a current-density of 750-1,000 amps per sq. ft. is suitable. A temperature of 500-600‹ C. is maintained. A column of bi-polar electrodes may be employed with a voltage of 1À2-1À4 per gap. The mixture may be subjected to preliminary electrolysis to remove metals electro-negative to lead, particularly silver. The galena may be added in a separate compartment in which the gangue formed is skimmed off ; the preliminary electrolysis may be effected in this compartment. The mixture may pass to the cell proper through a molten lead seal. Sulphur is collected by a reflux condenser and the lead produced is removed from the cell by a syphon. Lead chloride may be recovered from the gangue and returned to the cell.
Patent GB-761515-A (GB)
Title: Improvements in and relating to hydraulic systems
IPC: F16H61/46
Filed: 1954-10-26
Abstract: 761,515. Automatic frequency control systems. GENERAL ELECTRIC CO. Oct. 26, 1954 [Oct. 26, 1953], No. 30875/54. Class 38 (4). [Also in Group XXIX] To maintain constant the output frequency of a generator 10 which is driven from a prime mover 12 through a variable-speed hydraulic gear 11, the output frequency is controlled through a connection 13 by a frequency control circuit 14. The control circuit 14 includes series resonant circuits 30, 31 tuned respectively to frequencies slightly above and slightly below the desired frequency. The output of the resonant circuits 30, 31 is fed through rectifiers 32, 33 to solenoids 15, 16 of an hydraulic control valve 17, thus controlling the gear ratio of the hydraulic coupling 11. If several generators are to be connected for parallel operation, and a proper load division is required, a transformer 48 is connected across a resistor 38 of the frequency control circuit 14 thus introducing a generator load signal into the circuit 14 in such a way that if, for example, there is an increase in load from a desired value, the resonant circuit 30 is aided and the circuit 31 is opposed to cause a load decreasing adjustment.
Patent GB-953570-A (GB)
Title: Apparatus for recording signals upon, or for reproducing previously recorded signals from a magnetic tape
IPC: H04N5/782
Filed: 1961-08-28
Abstract: 953,570. Control of A.C. motors. FERNSEH G.m.b.H. Aug. 28, 1961 [Aug. 30, 1960], No. 30922/61. Heading H2J. [Also in Division G3] Relates to magnetic tape recording / reproducing apparatus for television signals in which a rotating head-rum is driven by a synchronous motor 5. Initially, generator 11 oscillates at a frequency of 40-50 c/s. and its output is applied through converter stage 12 having a sinusoidal output to limiter circuit 13 which prevents the voltage from losing its sinusoidal character. The limited sinusoidal voltage passes through stage 14, with push-pull output, into phase-splitter 15 having two outputs phase-displaced by 90 degrees. After amplification, the two sinusoidal voltages are converted in Scott circuit 20 into a threephase supply for the motor 5. Closure of starting switch 21 operates relay 22 to remove a short-circuit from the output of stage 12. A vibrating relay 25 makes and breaks a short-circuit on one phase of the twophase supply from which the motor voltage is derived, so causing the motor to oscillate and overcome initial friction. A relay 26 causes the output voltage of starter stage 27 to increase gradually, so that the natural frequency of generator 11 rises to 240-245 c/s. When the generator 11 reaches a frequency of 230 c/s, synchronizer stage 28 becomes operative so that a 250 c/s. square-wave voltage from a master impulse generator synchronizes the generator 11 at the working frequency. No amplitude limitation takes place during full-speed operation. After the motor has reached full speed, control stages 29, 30 become effective to regulate the phase and amplitude of the sinusoidal voltage appearing at the output of converter 12. The operation of the stages 29, 30 is controlled by a servo-system sensitive to the angular position of the motor, the voltage applied to terminal 31 serving for coarse control and the differentiated voltage to terminal 32 for fine control. An eddy-current brake is coupled to the motor, and, during the recording operation, a signal train is derived from rotation of the motor shaft, and, during reproduction, a train is derived from the synchronizing components of the composite television signal on the tape. The pulses of one or other of these trains are compared in phase with a reference signal derived from the horizontal synchronizing signals taken from the master impulse generator. The error voltage, and its differential, are combined to control the excitation of the eddycurrent brake. This prevents hunting of the head-drum motor.
Patent GB-363755-A (GB)
Title: Improvements in or relating to electron discharge devices
IPC: H01J21/36
Filed: 1930-10-15
Abstract: 363,755. Thermionic valves. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Oct. 15, 1930, No. 30923. Convention date, Nov. 13, 1929. [Class 39 (i).] The electrodes and the cathode heater are carried upon and held directly in fixed relation to each other by an insulating block formed for example of ceramic material such as magnesia. A carrier 1, in the form of a dish, sup ports through annular steps a tungsten or tantalum anode 9, a grid 8 a cathode 7 and a heater 5 A groove 4 ensures a long creeping surface between the cathode and the grid. The electrodes consist of plates which are strengthened by means of grooves, and are secured in position by lugs 10. Grooves 11 in the carrier house the lugs which are bent to grip the conical sides thereof. The size and the spacing of the holes in the grid depend upon the characteristic desired. The cathode is coated on the side nearest the heater with magnesia, for example by oxidizing a magnesium layer. The Specification as open to inspection under Sect. 91 (3) (a) states also that concentric cylindrical electrodes may be mounted at their ends within grooves in two insulating discs. This subjectmatter does not appear in the Specification as accepted.
Patent GB-755909-A (GB)
Title: Improvements in or relating to a wheel structure
IPC: B60B19/10
Filed: 1954-10-26
Abstract: 755,909. Vehicle wheels. KELSEY-HAYES WHEEL CO. Oct. 26, 1954 [Dec. 7, 1953], No. 30926/54. Class 144 (1). In a disc wheel 1 having a cover disc 3, louvres 20, 21 are provided respectively on one (inboard). side of openings 12 in the wheel body disc 5 and the other (outboard) side of openings in the cover disc 3 to co-operate, on rotation of the wheel, to direct cooling air across the brake drum 13. As shown, the louvres 21 are pressed out from the cover disc 3 to face in forward rotational direction of the wheel and the disc 3 is located on the wheel, by co-operating indents 18, 19 on the disc periphery and wheel rim, to align the louvres 21 with the leading portion of the wheel disc apertures 12. The wheel disc louvres 20 are all formed integral with an annulus 22 which is secured to the inboard side of the wheel disc so that the louvres 20 cover the leading half of the apertures 12 and open rearwardly to suck the air, scooped in by the louvres 21, through the apertures 12, Fig. 3.
Patent GB-1465516-A (GB)
Title: Method of and apparatus for cooling freshly milked milk in two stages
IPC: F25D31/00
Filed: 1974-07-12
Abstract: 1465516 Cooling liquids in bulk ALFALAVAL INDUSTRIETECHNIK GmbH 12 July 1974 [14 July 1973] 30971/74 Heading F4S Freshly milked milk is at once cooled in a first cooling stage to substantially 15 C. before it passes into a storage tank 6. On tormination of the milk supply, the stored milk is continuously recycled in a second cooling stage until cooled to about 4 C. In the circuit shown the fresh milk entering at line 1 immediately flows to a heat exchanger 3 wherein the milk is cooled to 15 C. before entering the storage tank 6 via a pipe 5 terminating near the bottom of the tank. A non- return valve 15 ensures that all the fresh milk passes directly to the heat exchanger. When the fresh milk supply (through line 1) terminates, a pump 13 is started and (owing to the provision of a non-return valve 2 in the line 1) the contents of the tank 6 are recycled continuously through the heat exchanger 3 (now operating to cool the milk to a lower temperature) until the stored milk temperature is at about 4 C. Operation of the pump may be by means of a time switch and/or by a thermostat in the storage tank. 7 and 11 are couplings enabling the storage tank to be removed and conveyed to an emptying point.
Patent GB-508532-A (GB)
Title: Method and device for the fine machining of plane surfaces
IPC: B23B3/00
Filed: 1938-10-26
Abstract: 508,532. Milling; drilling. VOMAG MASCHINENFABRIK AKT.-GES. Oct. 26, 1938, No. 30997. Convention date, Oct. 26, 1937. [Class 83 (iii)] In machining a plane surface, the work piece 3 is traversed past a hard metal or diamond tool 1 having front and rear cutting edges and mounted on a stationary rotary spindle perpendicular to the work surface so that overlapping arcuate cuts are taken successively by the front and rear edges of the tool. The tool 1 may have symmetrical cutting edges, so that a series of fine grooves 4 is cut in the advancing work, these grooves being broken up by the back-cuts made while the tool describes the paths 5, 7, 9, &c., so that a final surface such as 12 is produced. In a modification, Fig. 4, the inner cutting edge of the tool is shaped as shown at 14 so that the back-cuts produced by this edge result in finer surface as shown at 121. In another modification, several, preferably two, tools are arranged on the same spindle preferably so that only one of the tools engages the surface at a time. The second tool cuts slightly deeper grooves 18 and is somewhat nearer to the spindle axis than the leading tool so that only the second tool 16 makes back-cuts as shown at 19. By this arrangement a greater amount of material may be removed from the surface 3. The apparatus may also be used in conjunction with fine-drilling apparatus. Thus, the spindle 20 of the surfacing-tool 25 may carry a drilling- spindle 21 which is removed after boring the hole 24 and the work then traversed laterally to true the surface 23. In some cases the spindle 21 may be withdrawn into the milling- spindle after boring the hole. In another modification, parallel milling and boring spindles are arranged side by side on the same machine.
Patent GB-188218-A (GB)
Title: A retaining device or clip for use in connection with boxes and like receptacles
IPC: B65D43/24
Filed: 1921-11-21
Abstract: 188,218. Pollok, R., and Carsons, Ltd. Nov. 21, 1921. Stays.-Relates to a wire clip for holding open the hinged lid of a box &c. The construction shown in Fig. 2 comprises cranked part a<2> adapted to engage the edge of a flat lid, the leg a<1> projecting down to engage the back of the box and the leg a being bent up to rest against the box end. The clip shown in Fig. 5 is formed by doubling and twisting a piece of wire and has a cranked end a<6> adapted to engage the flange of a box lid the legs a<3>, a<4> straddling the end of the box body. The clips may be utilized for holding in position a price card.
Patent GB-505510-A (GB)
Title: Direct coupled diaphragms for pumping of liquids and semi-solids in all diaphragm pumps
IPC: F04B43/02
Filed: 1937-11-13
Abstract: 505,510. Diaphragm pumps. HALL, S. A. BARR-, and WICKHAM & CO., Ltd., D. Nov. 13. 1937, No. 31208. [Class 102 (i)] A diaphragm pump for liquids or semisolids comprises two diaphragms A, B rigidly connected by one or more distance pieces C coupled to an operating lever I, the diaphragm B being fitted with one or more non-return valves G and the diaphragm A having no aperture or otherwise completely sealed. The base chamber D is fitted with one or more inlets J with non-return valves E, and the chamber F with one or more delivery outlets K. The Provisional Specification states that some of the outlets may be fitted with inspection plates or priming devices, and that priming may also be effected through the top diaphragm by means of sealed priming devices with non-return valves.