baber/WOPTO huggingface dataset:
Patent GB-812116-A (GB)
Title: Fluorinated polymeric materials
IPC: C08F214/26
Filed: 1957-10-23
Abstract: New polymers are made by polymerizing a perfluorovinyl ether of formula CF2 = CF-OR, where R is an alkyl or fluorinated alkyl radical, either by itself or with a halogenated ethylene, especially tetrafluoroethylene.  Specified ethers are methyl-, n-propyl-, n-butyl-, trifluoromethyl-, 2.2.2-trifluoroethyl- and 2.2.3.3-tetrafluoropropyl ethers.  Polymerization may be effected at 0 DEG  to 100 DEG  C., at normal or increased pressures and may be carried out in bulk or in presence of an inert diluent, e.g. water or a perfluorinated solvent.  Polymerization catalysts specified are alpha, alpha1 - azo - bis - (alpha, omega-dimethylvaleronitrile), benzoyl peroxide and a mixture of ammonium persulphate and ammonium perfluorocaprylate.  The polymers are soluble in dimethyl formamide and may be used for moulding, for the production of tubing, films or fibres or for wire-coating.ALSO:A perfluorovinyl ether of general formula CF2 = CF-OR where R is an alkyl radical or a fluorinated alkyl radical is polymerized to produce new polymers (see Group IV (a)).  Specified ethers are the methyl-, n-propyl-, n-butyl-, trifluoromethyl-, 2.2.2 - trifluoroethyl - and 2.2.3.3 - tetrafluoropropyl ethers. The alkyl perfluorovinyl ethers are prepared by reaction of an alkali metal alcoholate with tetrafluoroethylene according, for example, to the equation RONa + CF2 = CF2 --> ROCF = CF2 + NaF The fluorinated alkyl ethers are prepared (1) by reaction of fluorinated alcoholates with tetrafluoroethylene or (2) by the fluorination of 2-alkoxy propionic acids followed by the decarboxylation and dehydrofluorination of the sodium salt of the fluorinated 2-alkoxy propionic acid.  In examples: (a) n-butyl perfluorovinyl ether is made by first stirring together n-butyl alcohol dissolved in dioxane with sodium dispersed in toluene, then charging the mixture into a bomb pressurized with tetrafluorethylene and intermittently repressured with tetrafluoroethylene and after reaction treating the mixture with n-butyl alcohol to destroy excess sodium and finally filtering and distilling the filtrate to obtain the ether; (h) 2.2.2-trifluoroethyl perfluorovinyl ether is similarly prepared from 2.2.2-trifluoroethyl alcohol, sodium and tetrafluoroethylene.
Patent GB-1550709-A (GB)
Title: Production of unsaturated diesters
IPC: B01J27/00
Filed: 1977-08-08
Abstract: The preparation of some unsaturated diesters is advantageously carried out by reacting a conjugated diolefin with oxygen and a carboxylic acid in the presence of an alkali metal iodide or alkaline earth metal iodide, which efficiently catalyses the reaction.
Patent GB-177207-A (GB)
Title: Improvements in and connected with packing devices for combined bearing and lubricating boxes for the axles or necks of calender bowls or rollers
IPC: D06C15/08
Filed: 1920-11-26
Abstract: 177,207. Evans, W. P. Nov. 26, 1920. Dust &c., excluding; oil, retaining in a combined bearing and lubricating-box for the neck of a calender bowl or roller. A packing-device is employed consisting of two rings a, b, Fig. 2, of which the ring b is secured to the bowl A or to the axle and the ring a fits slidably over the ring b and is caused to rotate therewith by studs e and has a vertical face bearing against the end wall of the bearing, being pressed thereon by a number of spiral springs c located in pockets b<1> in the ring b. The ring b may be provided with a piston-ring f, Fig. 4, or a ring of fibrous packing. In a further modification, the rings a, b, Fig. 5, are reversed in position and have flanges encircled by leather or like washers g secured together. The rings may be in segments or halves and may be of brass &c. Fibrous packing may be applied to the working faces. The device may be applied inside the box.
Patent GB-848668-A (GB)
Title: Improvements relating to electrical circuit arrangements
Inventor: MYNALL DENNIS JAMES
IPC: H03H11/42
Filed: 1955-11-22
Abstract: 848,668. Valve amplifying circuits exhibiting gyratory properties. BRITISH THOMSONHOUSTON CO. Ltd. Dec. 4, 1956 (Nov. 22, 1955], No. 33461/55. Class 40(6). The invention relates to gyrator circuits which it is shown may be regarded as three-terminal networks in which the current flowing into each terminal is proportional to the potential difference between the other two terminals, the constant of proportionality being uneffected by a cyclic change of terminals. The circuit comprises three differential amplifiers each having two input and one output terminals, the terminals of the three amplifiers being connected together as shown to provide the three terminal points of the gyrator 1, 2, 3, each gyrator terminal being connected to a different terminal from each amplifier. Resistance capacitance couplings between the amplifiers may be used instead of the D.C. couplings shown. Specification 848,667 is referred to.
Patent GB-911944-A (GB)
Title: Improvements relating to scoop loaders and attachments for them
IPC: E02F3/38
Filed: 1961-09-19
Abstract: 911,944. Shovelling machines. KOEHRING CO. Sept. 19, 1961 [Nov. 30, 1960], No. 33517/61. Class 68 (1). To maintain in a scoop-loading attachment the inclination of a scoop 25 substantially constant to a datum plane as a two-part boom structure 26, 27 on which the scoop is pivoted at 38 is moved to horizontally advance or withdraw the scoop, there is provided between the inner section 27 of the boom and the scoop 25 a linkage comprising a jack 50, a bell-crank 45, and a link 54. The jack 50, which is locked and therefore of a fixed length during the horizontal or withdrawal of the scoop, is pivoted at 51 and 52 to an extension of the inner boom section and to the bell-crank 45 respectively. The bell-crank 45 is pivoted at 48 on the outer boom section and the links 54 are pivoted at 56 and 52 on the bell-crank and scoop respectively. Specification 866,759 is referred to.
Patent GB-941408-A (GB)
Title: Improvements in or relating to actuating mechanism for rail-and-flange lubricating apparatus for railway tracks
Inventor: WATTS WALTER ALFRED HENRY
IPC: B61K3/00
Filed: 1961-09-20
Abstract: 941,408. Rail-and-wheel-flange lubricators. P. & M. CO. (ENGLAND) Ltd. Sept. 11, 1962 [Sept. 20, 1961], No. 33679/61. Heading F2A. In or for rail-and-flange lubricating apparatus for railway tracks of the kind including distributing means for location on a track rail 3 receiving lubricant from a reservoir 41 through one or more pumps, the actuating means therefor including an element 26 disposed in the path of the passing wheels of rolling stock to operate a pump 40 or pumps whereby lubricant is forced from the reservoir 41 to the distributing means for direction to the rail surface(s), the element 26 is operatively connected by hydraulic- or fluid-pressure-actuated means to a pump 40 to force the lubricant. The actuating means comprises a master cylinder 36 carried by a frame 2 fastened to a rail 3, in which the element 26 is mounted to operate a cylinder plunger through a pivoted lever 30 mounted in the frame 2, the cylinder 36 being connected by a pipe 38 to a slave cylinder 39 which actuates the pump 40. The frame 2 is secured by clamps 9 to a rail 3 and has abutments engageable by parts of the clamps 9. Each clamp 9 comprises a foot 16 engageable with the rail base flange 8 at one side, and a saddle 17 to engage with the flange 8 at the opposite side. The saddle 17 has teeth 20 which selectively engage teeth 21 on a clamp limb 14 to vary the position of the saddle 17 with the flange dimensions. The saddle 17 has a head 22 and recesses 23, 24, engaging selectively with the flange 8 and offset relative to the saddle teeth 20, so that further adjustment of the saddle 17 and clamp 9 is possible. The slave cylinder 39 and the pump 40 are mounted on the reservoir 41, the pump 40 having a hose 50 to deliver lubricant to the distributing means. By means of a valve 49 connected to the reservoir 41 a certain amount of lubricant can on each operation be returned thereto, to control the amount of lubricant delivery. To actuate the master cylinder 36 the lever 30 is operated by a part 29 of a ramp 26, pivotally mounted at 27 in the frame 2. Specification 941,407 is referred to.
Patent GB-1413727-A (GB)
Title: Electrolysis of aluminium
IPC: C25C3/20
Filed: 1973-07-16
Abstract: 1413727 Automatic control of meltelectrolytic aluminium production SWISS ALUMINIUM Ltd 16 July 1973 [18 July 1972] 33736/73 Heading C7B [Also in Division G3] In a known type of cell for the recovery of aluminium by electrolysis of aluminium oxide in a fluoride melt, the instantaneous cell resistance is calculated by a computer from the cell base voltage and base current as sampled at regular intervals, the sampling being discontinued if the cell is disturbed by anode effects or is being tapped or serviced e.g. an anode being replaced. The instantaneous resistance is compared with a base resistance, the absolute value of any differences being summed to form a cumulative total. If a cell disturbance causes this total to exceed a pre-set value, the cell resistance is increased temporarily by automatically or manually increasing the cell interpolar distances until the disturbance is eliminated, when the original interpolar distances are restored. If the total does not exceed the given value within a given period then the cumulative total is returned to zero. The cell resistance may be sampled every 15 to 60 seconds for a period of 1 to 8 hours.
Patent GB-447766-A (GB)
Title: Improvements in carburetting apparatus for use with burners and internal combustion engines
IPC: F23D11/04
Filed: 1934-11-23
Abstract: 447,766. Regulating liquid - levels. LANGE, K. H., 13, Bralunden, Nockeby, Sweden. Nov. 23, 1934, Nos. 33740 and 33741. Convention dates, Dec. 1, 1933 and Oct. 27, 1934. [Class 123 (i)] [See also Groups XI, XXVII, and XXIX] A burner housing 12 is fed with fuel through a pipe 29 from an auxiliary store tank 103 which is also connected below the fuel level by a pipe 101 to a main fuel tank 100. The top of the tank 103 is also connected to the housing 19 by a pipe 30. A float lever 110 in the tank 103 is connected by a spring 112 to one arm 113 of a lever 109 carrying two valves 106, 107. When the tank 103 is full, the spring 112 holds the lever 109 in the position in which the valve 106 closes the pipe 101. As fuel is supplied to the furnace the level in the housing 12 falls, allowing air to ascend the pipe 30 and fuel to pass through the pipe 29 till the lower end of the pipe 30 is again sealed. The level in the tank 103 consequently falls until the float lever 110 moves the lower end of the spring to the left of the pivot 108 of the levers 109, 110. The spring 112 can now operate the lever 109 to raise the valve 106 and to lower the valve 107 until it closes the pipe 29. Fuel then passes from the main tank 100 to the tank 103 until the lower end of the spring is on the right of the pivot 108 when the lever 109 is returned to its original position.
Patent GB-784853-A (GB)
Title: Improvements in and relating to analogue computers
Inventor: BARBER ERNEST EDWARD
IPC: G06G7/26
Filed: 1953-12-04
Abstract: 784,853. Electric analogue calculating systems. AIR TRAINERS LINK, Ltd., [formerly AIR TRAINERS, Ltd.]. Dec. 3, 1954 [Dec. 4, 1953], No. 33839/53. Class 37. For analogue computation of the values of a complex non-linear function of a variable without inherent time delay, a voltage representing a simple linear or non-linear function of the variable is produced from the input voltage by static electric means to approximate to the required function, without time delay, and is additively or multiplicatively combined with a voltage produced by a servo-potentiometer device responsive to the input voltage as a correcting function of the variable, to produce an output voltage accurately representing the required complex function. In Figs. 1, 3, the complex function f3(Vl) represented by curve (a) is equivalent to the product of a simple function f1(V1) and a correcting function f2(V1), and static device D (which may be a fixed voltage divider, a transformer, a thermionic amplifier, or the like) supplied with a voltage proportional to V1 derives a voltage proportional to f1(V1) (which may, e.g., be parabolic) represented by curve b to energize a potentiometer p, adjusted by an electromechanical servo-system EM responsive to the input voltage and wound in accordance with function f2(V1) represented by curve c. The slider voltage V2 is then proportional to f1(V1)f2(V1)=f3(V1) as required, with reduced error due to operational time delay. Similarly, the complex function f3(V1) equivalent to the sum of a simple function f4(V1) and a correcting function f5(V1) is derived (Figs. 2, 4, not shown) by energizing a static electric device with a voltage proportional to V1 to produce a voltage proportional to f4(V1), and similarly energizing a servosystem to adjust a constant voltage energized potentiometer designed to produce a slider voltage proportional to f5(V1); the voltages being additively or subtractively combined at the input of an amplifier whose output is proportional to f3(V1)=f4(V1)+f5(V1) as required.
Patent GB-1095784-A (GB)
Title: Benzothioxanthene dyestuffs and processes for their manufacture
IPC: C09B57/00
Filed: 1965-08-09
Abstract: The invention comprises dyes of the formula <FORM:1095784/C4-C5/1> where R is H, an alkyl, cycloalkyl or aryl group which may be substituted, a heterocyclic ring or a hydroxy or amino group; R1 and R2 are H, CN, OH, halogen, alkyl, aryl, alkoxy, carbalkoxy, acyloxy or amino.  The compounds are prepared by heating a diazonium salt of 4 - (21 - aminophenylmercapto) - naphthalic acid or 4-phenylmercapto-5-aminonaphthalic acid, or an imide or anhydride thereof, with copper or a copper salt, and, in the case of the acid and anhydride, thereafter condensing with a compound of the formula RNH2.
Patent GB-1353282-A (GB)
Title: Circuit for detecting signals transmitted onto a two wire line
IPC: H04M3/22
Filed: 1972-07-20
Abstract: 1353282 Automatic exchange systems INTERNATIONAL STANDARD ELECTRIC CORP 20 July 1972 [27 July 1971] 34014/72 Heading H4K A relayless subscribers' line circuit incorporates a first resistor potential divider R4, R5 connected across the battery terminals, a second divider R2, R3 connected across the line wires, a pair of battery feed resistors R6, R7 and a comparator, e.g. differential amplifier AM, connected between the tapping points on the two dividers. The arrangement detects earthing of either or both line wires by means of a subscribers' key switch, e.g. contacts I2, I3, and is uninfluenced by length of line or battery voltage. Earth leakage of the line wires is compensated by inserting a variable resistor in series with R5 thereby permitting a threshold level to be obtained for the circuit. The resistors R2 to R5 have the same value which is considerably higher than that of R6, R7. The subscribers' key is provided for recalling an operator or initiating a call back condition.
Patent GB-196329-A (GB)
Title: Improvements in loose-leaf filing devices
IPC: B42F13/26
Filed: 1921-12-19
Abstract: 196,329. Walker, A. E. Dec. 19, 1921. Addition to 9117/14. Post, claw, and like files.-The loose-leaf binder described in the parent Specification is modified so that both sets of half rings are movable. Sleeves B, C on the base plate A, in which the joining wires of the pairs of half rings D, F and E, G are pivoted, are cut away at the centre so as to allow tongues T, X attached to the wires joining the rings to project. The end of the tongue T is forked so as to fit over the reduced end of the tongue X, and to enable both tongues to engage with an inclined slot S in a turned-up portion of a sliding bar N. Movement of this bar causes the end of the tongues to be raised or lowered and the half rings to be opened or closed. Specifications 20493/05 and 5791/10 are referred to.
Patent GB-988461-A (GB)
Title: Improvements in and relating to electric junction boxes and method of making same
Inventor: BARTON GEOFFREY
IPC: H02G15/18
Filed: 1960-10-05
Abstract: 988,461. Moulding junction boxes. NORTH WESTERN SPECIALITIES Ltd. Jan. 4, 1962 [Oct. 5, 1960], No. 34108/60. Heading B5A. [Also in Division H2] A junction box, Fig. 1, comprises a shell of flexible material, e.g. polystyrene, with one or more trough-like parts 10 and 11 with side walls having flanged or thickened edges 12, each trough end having a collar 14 split at 16 so that a cable may be inserted between the sprung-apart side walls of the trough, the collar subsequently embracing the cable. The box is manufactured from a sheet of polystyrene which is heated until deformable and then laid on a shaping piece (Fig. 3) being drawn thereto by air suction through holes therein. The ends of the shell are formed with outward extensions or ribs 18 so that a buttressed closed end is formed by moulding and surplus material is taken up, the ends subsequently being cut off to the required form. In this way sharply defined end parts of uniform thickness are produced. Portions of the shaping piece which are located in the interior of the finished junction box are made detachable, for subsequent dismantling, by means of dove-tailed joints (Fig. 4, not shown).
Patent GB-479746-A (GB)
Title: An improved process for treating tin-plate containers
IPC: C25D11/34
Filed: 1936-06-06
Abstract: A tinplate container for foodstuffs containing sulphur compounds which normally discolour tin when the foodstuff is sterilized in contact therewith is protected by a film of tin oxide formed by anodic oxidation with an overcoating of a non-pigmented lacquer deposited electrically in a subsequent step.  The coating may be preceded by electrolytic pickling as described in Specification 479,681.  Specification 455,810, [Group XXXVI], also is referred to.
Patent GB-831468-A (GB)
Title: Adjustable endless elevator
Inventor: SAVAGE WILLIAM LAWRENCE
IPC: B65G41/00
Filed: 1955-11-29
Abstract: 831,468. Elevating materials. BLACKSTONE & CO. Ltd. Aug. 7, 1956 [Nov. 29, 1955], No. 34205/55. Class 78 (1).  Conveyer frame 14 carrying endless conveyer 16 is supported by piston 20 of cylinder 21 and by piston 10 of cylinder 9 so that each end of the conveyer may be independently adjusted in height. Cylinder 21 is carried by arms 22 pivoted to tube frame 3, and cylinder 9 is carried by arms 8 pivoted to rear axles 7, struts 1 and 24 completing the framework. The cylinders or jacks may be hydraulic or mechanical. Drawbar 6 enables the conveyer to be secured to a tractor. An internal combustion engine is mounted on the framework to drive the conveyer through drive 18, 17, 15. The piston and cylinder 10, 9 may alternatively be incorporated in struts 1 or in strut 24.
Patent GB-384797-A (GB)
Title: A new or improved file for record cards, papers or the like
IPC: A47B51/00
Filed: 1931-12-10
Abstract: 384,797. Boxes for record cards &c. JARDINE, R.. Roneo Works, Romford, Essex, JOHNSON, E. H., Amberley, Barnett Wood Lane, Ashstead, Surrey, and RONEO, Ltd., 5, Holborn, London. Dec. 10, 1931, No. 34206. [Class 18.] A box for record cards, papers and the like has mounted therein a tray 2, having two fixed sides 2<b>, 2<c> and two movable ends 3, capable of being partially withdrawn from the box in a vertical direction and supported in such position for inspection of the cards &c. The tray is attached to the bottom of the box by hinge members 7 which are collapsed as shown dotted, Fig. 1, when the box is closed. In the 'raised position, the pivots 7<a> of the members 7 pass the vertical and prevent the lowering of the tray 2 until the members 7 are pressed towards one another by finger-pieces 9 projecting through slots 10 in the box 1. A spring 8 facilitates the raising of the tray 2 to accessible position and partly supports it. Rollers 11 on the tray engage the walls of the box. The end-members 3 of the tray 2 have tongues 3<a> fitting into a central groove 2<d> in the tray bottom and have U-shaped members 5 spring pivoted thereto provided with hooked ends 5<a> adapted ' to engage perforations 6 formed in recesses 2<e>, 2<f> in the tray sides so as to adjust the positions of the ends 3. A bracket 13 is fixed to each end member 3 to support it in an inclined position for facilitating inspection of the record cards or the like.
Patent GB-605223-A (GB)
Title: Improvements in and relating to excavating and hauling vehicles
IPC: E02F3/64
Filed: 1945-12-18
Abstract: 605,223. Earth scrapers. KOEHRING CO. Dec. 18, 1945, No. 34244. Convention date, Oct. 13, 1941. [Class 68 (i)] [Also in Groups XXXI and XXXII] An earth excavating and hauling vehicle has a frame formed in two parts, the front part telescoping within the rear part, and each carries a scraper section of an earth container. The rear section comprises a scoop having a cutting edge 16 and pivots about a point 17 on a bracket 18 extending from the rear portion of the frame. The height of the frame in respect to the front and rear wheel assemblies 1 and 2 can be varied by independently operated jacks 19 and 30. Power for driving the scraper sections and the pumps for operating the jacks is provided from an engine 38. In use at the site, rams 50 push the front section away from the rear section and the jacks 30 are lowered until the cutting blade 16 is at the required level. The vehicle is then driven forward until the scoop is nearly filled. The front of the scraper is then lowered and is retracted by the ram 50, so that more earth is scraped into the earth container by the cutting edge 12, and the scoop is closed. The jacks raise the frame and the earth container clear of the ground and the vehicle is moved to the dumping site. The front section is then pushed forward and the rear section is rotated about the pivot 17 by jacks 44. The vehicle may be towed instead of being self propelled.
Patent GB-848612-A (GB)
Title: Artificial filament wet spinning apparatus
IPC: D01D5/06
Filed: 1958-10-27
Abstract: <PICT:0848612/IV(a)/1> A wet spinning apparatus comprises a container 11 for a coagulating liquid 17 in which is suspended a spinneret 12 supplied through a conduit 13 with a spinning solution from a feed pipe 14.  The container 11 is provided with an inlet 18 and outlet 19 for the coagulating liquid.  Mounted on the spinneret 12 by means of a bracket 29 is a tubular ring 27 position in front of the face of the spinneret and in a plane parallel with the spinneret face.  The side of the ring away from the spinneret face is provided with a number of equally spaced orifices through which a coagulating liquid (preferably having the same composition as the liquid 17) is injected into the spin bath, coagulating liquid being supplied to the ring 27 through the conduit 30.  The orifices in the ring 27 are preferably so disposed that the streams of coagulant discharged from them converge slightly towards the converging bundle of filaments 23 extruded from the spinneret.  The filaments 23 are drawn over snubber bars 24 to form a tow 26.  The apparatus improves the uniformity of the supply of coagulating liquid to the spinneret face and the maintenance of the required temperature in this liquid supply.
Patent GB-900396-A (GB)
Title: A process for the preparation of threo-ª--(p-nitrophenyl)-serine
IPC: C07C233/00
Filed: 1959-10-09
Abstract: Threo-b -(p-nitrophenyl) serine is prepared by reacting the potassium salt of glycine with more than one mole of p-nitrobenzaldehyde per mole of glycinate, in aqueous alcohol at a temperature over 20 DEG C. in the presence of potassium carbonate and setting free the carboxylic acid from the salt obtained by treatment with mineral acid.  In examples 2 mols p-nitrobenzaldehyde in ethanol are added to an aqueous solution of 1 mol of potassium glycinate, anhydrous potassium carbonate added, the mixture stirred at 30-35 DEG C. and the resulting salt acidified with concentrated hydrochloric acid.