baber/WOPTO huggingface dataset:
Patent GB-1104328-A (GB)
Title: Process for the preparation of xanthine derivatives
Inventor: GOLDNER HERBERT
Filed: 1965-07-26
Abstract: Xanthine derivatives of formula <FORM:1104328/C2/1> where R1 and R2 are alkyl, R3 is alkyl or aralkyl and R4 is hydrogen or alkyl are prepared by reacting a 5-nitrosouracil of formula <FORM:1104328/C2/2> with an alkylating or aralkylating agents such as an alkyl halide, dialkyl sulphate or diazoalkane. Caffeine, 8-methylcaffeine, 8-isopropylcaffeine, 7-isopropyltheophyllin and 7-benzyltheophyllin are prepared in examples.
Patent GB-955991-A (GB)
Title: Improvements relating to commutator type dynamo-electric machines
Inventor: FENEMORE ALAN STEPHEN
IPC: H02K13/10
Filed: 1959-09-18
Abstract: 955,991. Dynamo - electric machines. ENGLISH ELECTRIC CO. Ltd. Sept. 12, 1960 [Sept. 18, 1959], No. 31860/59. Heading H2A. Commutator segments 1, 3, 5, 7... in a lap-wound armature are separated by auxiliary segments 2, 4, 6 ... maintained at intermediate potentials by a common ring resistor or transformer potential divider. The auxiliary segments are narrower than the main segments and may be at a lower level to avoid contact with the brushes. In a modification (Figs. 2 and 3, not shown), the auxiliary segments are replaced by one or more copper foils separated by mica sheets and connected to appropriate tappings on the divider. In the case of multipolar machines, a single divider connected to equalizers may be used (Fig. 4, not shown). The resistive divider may be wound on an insulating ring behind the risers.
Patent GB-1491924-A (GB)
Title: Apparatus for the continuous measurement of the oxygen content of molten copper or alloys thereof
IPC: G01N33/20
Filed: 1975-07-30
Abstract: 1491924 Solid electrolyte oxygen probe NORANDA MINES Ltd 30 July 1975 [2 Aug 1974] 31898/75 Heading G1N A probe for measuring the oxygen content of molten copper or alloys thereof comprises an austenitic stainless steel tube 18 of large heat capacity which can withstand the molten metal, a solid electrolyte tube 16 with a closed end, cemented by alumina cement 20 in the steel tube 18 so that it projects by at least its own diameter, an electrical connectors 28, 30, 32 to the inside of the solid electrolyte tube at the closed end, means for providing a reference oxygen potential in the tube and a melt contact 12. Preferably the stainless steel tube 18 is internally threaded at 22 and the alumina cement slopes at an angle of about 45 degrees between the end of the steel tube and the solid electrolyte tube. The inside electrode contact is preferably of porous platinum by decomposing chloroplatinic acid in situ, attached by a platinum spider 30 to platinum wire 28 which passes through alumina tube 26. The oxygen reference is either dry air supplied through tube 26 or a metal/metal oxide mixture e.g. Ni/NiO. The solid electrolyte may be zirconia or thoria and may be stabilized with CaO, MgO or Y 2 O 3 . The melt contact 12 preferably comprises an austenitic stainless steel tube 34 closed by a plug 36 of the same material welded in place. Electrical contact is by the same method as used in the measuring electrode.  The probe is preferably pre-heated by maintaining it 2 inches above the bath for 25 minutes before dipping and cooled for 10 minutes above the bath after dipping. Preferred probe dimensions are quoted.
Patent GB-879204-A (GB)
Title: An improved process for treating textile articles
IPC: D06P1/00
Filed: 1957-10-15
Abstract: The process of the parent Specification in which textile articles are placed on forms and enclosed in a chamber under super atmospheric pressure, subjected to spraying with hot treating solution, the latter being collected and recycled, is modified in that the treating solution addititionally contains a chelating agent selected from the group of ethylene diamine tetra acetic acid, diethylene triamine penta-acetic acid and hydroxyethyl ethylene diamine triacetic acid. The treating solution may also contain a nonionic scouring agent e.g. the condensation product of ethylene oxide with fatty acids derived from a vegetable oil such as olive oil.  Specified finishing agents which may additionally be included in the treating solution are melamine-formaldehyde and urea-formaldehyde.  Acid, direct, pre-metallized, disperse and vat dyestuffs are specified as constituents of the treating solution.  Additionally the treating solution may contain a lubricant, e.g. a sorbitol ester.  In examples textile articles e.g. nylon stockings are dyed with a solution containing (1) a condensation product of ethylene oxide and olive oil, (2) Stoddard solvent, (3) melamine-formaldehyde condensation product, (4) sorbitol ester lubricant, (5) ethylene diamine tetra-acetic acid and (6) a dyestuff.
Patent GB-1165636-A (GB)
Title: Improvements in or relating to Radar Display Correcting Arrangements.
Inventor: CHANDLER DAVID HORACE
IPC: G01S1/02
Filed: 1967-07-12
Abstract: 1,165,636. Triganometrical circuits. MARCONI CO. Ltd. 17 June, 1968 [12 July, 1967], No. 32122/67 Heading G4G. [Also in Division H4] In a radar display utilizing fixed deflection coils and a resolver producing sin # and cos #, where # is the bearing angle, the squint angle # of the aerial is corrected by combining voltages proportional to + sin # and + cos # with selected combined proportions thereof to produce a voltage proportional to - sin (#  #) and to - cos (#  8). A known arrangement involves the insertion of a - sin # voltage, Fig. 1 (not shown). In one embodiment a - cos (# + #) voltage is obtained from inputs + sin #, + cos # by the arrangement depicted, Fig. 2; a similar arrangement affords - sin (# - #), Fig. 3 (not shown). In a preferred embodiment, Fig. 4, arrangements are included for positive and negative squint angles and for two values of squint angle. The scale of the display is unaffected.
Patent GB-533906-A (GB)
Title: An improvements in or relating to trip mechanism for self-closing valves
IPC: F16K31/56
Filed: 1939-12-15
Abstract: 533,906. Valves. BLAKEBOROUGH, R. A., and KLOUMAN, F. A. Dec. 15, 1939, No. 32276. [Class 135] A self-closing valve of the kind in which a flexible diaphragm a is subjected to the pressure differences due to the relative rates of flow of the controlled liquid through the full and restricted areas of a venturi tube inserted in the pipe line is constructed so as to be sensitive by connecting the diaphragm a by a link c, lever d, to a rod e attached to a double bellows device f, f<SP>1</SP> which permits the rod e to move without friction and operate a lever g which normally acts on a trip or tumbler arm i to hold the valve open. A weight h normally holds the trip arm so as to keep the valve open, but at a high speed of liquid the diaphragm is operated by the liquid pressure to release the trip.
Patent GB-520561-A (GB)
Title: Carrier wave transmission systems
IPC: H03C1/52
Filed: 1938-11-08
Abstract: 520,561. Modulating systems. STANDARD TELEPHONES & CABLES, Ltd. Nov. 8, 1938, No. 32389. Convention date, Dec. 24, 1937. [Class 40 (v)] A modulating system comprises two stages of different power outputs which are modulated in phase opposition and whose outputs are combined in phase opposition. Valves or valve groups 1, 2 are fed in phase with carrier frequency from terminals 7, 8 and in phase opposition with modulation frequency at terminals 9, 10. The output circuit connected to anodes 11, 12 consists of coil 13-14 and condensers 15, 16 and is tuned to the carrier frequency. The output is taken off by coil 17. The system is adjusted so that the arithmetical sum of the high frequency current supplied by the valves is constant and thus the total high tension feed current is substantially constant. Also, if as shown, the characteristics showing high frequency output versus low frequency current are linear the resultant wave transmitted to the antenna may be modulated up to 100 per cent. Curve 18 shows the output of valve 1 with a modulation depth of 33 per cent., curve 19 the output of valve 2 modulated 100 per cent., while curve 20 shows the resultant antenna current modulated 100 per cent. If the characteristics of the valves are not linear the curvatures may compensate and produce a resultant rectilinear curve for the output current Fig. 3 (not shown). In the extreme case the valve 2 may be only employed to balance out the remaining portion of the carrier over a small part of the curve representing the output of valve 1 in order to obtain 100 per cent. modulation.
Patent GB-187161-A (GB)
Title: Improvements in adjustable spanners
IPC: B25B13/22
Filed: 1921-12-03
Abstract: 187,161. Bennett, G. M. Dec. 3, 1921. Sliding-jaw wrenches.-An adjustable spanner of the kind in which one of the jaws is adjustable on a rack mounted so as to have a limited sliding movement in a shank on the fixed jaw to set the jaws accurately to a nut after they have been set roughly by adjusting the jaw on the rack, is provided with a wedge passing transversely of the rack and engaging therewith to move it endwise. As shown, a fixed outer jaw a is integral with a shank A, and the inner adjustable jaw b is formed with a yoke b<1> which embraces the shank A and is acted on by a coiled spring j, Fig. 2, or a bent spring j<1>, Fig. 4, which normally presses teeth c<1> on the extension c of jaw b into contact with a rack d<1> mounted to have a sliding movement in the shank A. By pressing on yoke b<1>, the teeth c<1> are disengaged and the jaw moved so as to set it roughly to the required nut. The jaw b is then set accurately to the nut by means of a wedge m which adjusts the position of rack d<1> in the shank A. The rack d<1> is then guided by a pin f and slot h, and is acted on by a spring q. The wedge m is normally pressed outwards by a spring o, and is acted on by the finger to press it inwards while the spanner is set roughly. The spring o then forces the wedge m outwards, and this moves the rack d<1> to the left and reduces the distance between the jaws, thus setting them accurately to the nut.
Patent GB-341964-A (GB)
Title: Improvements relating to braking apparatus for aircraft
IPC: B64C25/44
Filed: 1929-10-25
Abstract: 341,964. Fluidpressure brakes. WESTINGHOUSE BRAKE & SAXBY SIGNAL CO., Ltd., 82, York Road, King's Cross, London.- (Assignees of Down, S. G.; 204, Hawthorne Street, Pennsylvania, U.S.A.) Oct. 25, 1929, No. 32467. Convention date, Nov. 13, 1928. [Class 103 (i).] The pressure in the fluidpressure brakes of the front landing wheels of an aeroplane is controlled automatically in accordance with the load on the rear wheel or skid and also with the load on each wheel. Two forward wheels F and a rear wheel G are shown having brakes applied by pressure fluid admitted to diaphragm chambers 3. Each wheel is supported by a plunger 7 moving in a casing 4 against a spring 11 and rubber pad 13, and a part 9 secured to the wheel-axle has an arm 17 which supports a hollow plunger 16 moving in another bore in the casing 4. A spring 15 in each plunger 16 supports a piston 14 and controls an inlet valve 21 which has an exhaust valve 22 on its stem, the valve 22 being seated on the piston when the valve 21 is open. The spring 15 in the rear casing 4 is given an initial compression by a screw 18 and lock nut 20 so that its valve 21 is normally open. By operating a valve 29, air is admitted from a reservoir 30 to a pipe 26 and enters a chamber 27 above the piston 14 through the valve 22 until the pressure on the piston overcomes the spring 15. Air also enters the rear brake chamber 3 through a pipe 25 and a reservoir 24 through a pipe 23. Air from the reservoir 24 also enters the apparatus on the front wheels but their valves 21 close immediately as their springs 15 are unstressed. Should the front wheels touch the ground first, their brakes are applied to a degree not exceeding the initial degree of braking applied to the rear wheel, but when the rear wheel contacts with the ground its valve 21 is again opened and further pressure is available. Should the rear wheel leave the ground, the piston 14 descends and the valve 22 opens a passage through the piston to exhaust ports 28, the chambers 27 at the front wheels exhausting through ball valves 33. These valves 33 and a similar one at the rear wheel also ensure the release of braking pressure when the control valve 29 is opened. Variation of load on the front wheels, by varying the compression of the springs 15, controls the individual pressures in the chambers 3, and should either wheel leave the ground the brake is released by the corresponding valve 22 opening the brake cylinder to exhaust. The rear control spring 15 may be connected to a skid instead of a wheel axle.
Patent GB-780294-A (GB)
Title: Improvements relating to starting systems for synchronous motors
Inventor: FREY ALFRED
IPC: H02P1/46
Filed: 1955-11-15
Abstract: 780,294. Control of A.C. motors. VEB LEUNA WERKE W. ULBRIGHT. Nov. 15, 1955, No. 32622/55. Class 38 (3). A synchronous motor, having a self-excited D.C. exciter 6 coupled to its shaft, is started as an induction motor by closing switch 7 to energize stator winding 2, the alternating current initially induced in the rotor field winding 1 of the motor being limited by means of choke 5 connected in parallel with resistor 4. The voltage of the exciter 6 increases only gradually during the starting period, the full value of the excitation current not being reached until the motor attains synchronous speed. For this purpose, a self-regulating resistor 8 is connected in the excitation circuit of the machine 6. The alternating current induced in the motor field winding during the starting period may be prevented from influencing the excitation of the machine 6 by providing this machine with an auxiliary exciter also driven by the synchronous motor. A resistor, corresponding to the resistor 8, as well as a choke, may be placed in the self-excitation circuit of the additional machine, Fig. 2 (not shown).
Patent GB-502712-A (GB)
Title: Improvements in, or relating to, overload release units for automatic circuit breakers and similar electrical switchgear
IPC: H01H71/16
Filed: 1937-11-26
Abstract: 502,712. Thermal switches. CRABTREE & CO., Ltd., J. A. (Schiele Industriewerke) Nov. 26, 1937, No. 32633. [Class 38 (v)] A thermal overload release unit for automatic circuit breakers is mounted in a cylindrical casing having annular hollow walls providing heat insulation. As shown, a bimetal strip 1, Fig. 1, connected in a controlled circuit by loads a and adapted upon overload to close a tripping circuit through a contact 2a is mounted in a casing comprising concentric cylinders 3, 4 supported by removable plugs 3a, 4a to form heat insulating spaces A, A', which may be evacuated or filled with heat insulating material. In a modification, the unit is made detachable, and the bimetal strip 1, Fig. 4, heated by a coil 7 in the controlled circuit co-operates with a contact 2a carried by a non-thermal springy strip 2, the response of the unit being varied by rotating an eccentric 5 to alter the separation of the contacts 1a, 2a, through a screw 5a, the setting being indicated by graduations on a loading spring 6 read against a mark on the casing.
Patent GB-731094-A (GB)
Title: Process for improving the knock stability of gasolines
IPC: C10G35/09
Filed: 1952-12-24
Abstract: A gasoline containing more than 30 per cent by weight of paraffins and less than 30 per cent by weight of naphthenes is treated to improve its knock stability by a process comprising catalytic treatment of the gasoline with hydrogen in two stages wherein, in the first stage, which is carried out in the presence of a catalyst consisting of platinum supported on an acidic carrier at a temperature between 425 DEG  and 525 DEG  C. and at a partial pressure of hydrogen of between 25 and 75 atmospheres, the 5-membered ring naphthenes are isomerized to 6-membered ring naphthenes and naphthenes are converted into aromatics, and in the second stage, at least part of the product thus obtained is subjected to dehydrocyclization in the presence of a catalyst consisting of platinum on a silica-gel carrier at a temperature between 480 DEG and 550 DEG  C. and at a partial pressure of hydrogen of between 1 and 25 atmospheres.  The preferred catalyst for the first step is platinum finely dispersed on alumina activated by treatment with a hydrogen halide, e.g. hydrogen fluoride, or a substance producing a hydrogen halide.  An example is given. Specification 719,882 is referred to.
Patent GB-659766-A (GB)
Title: Improvements in or relating to the manufacture of plates in particular for embossing, printing or the like
IPC: C14B1/56
Filed: 1948-12-17
Abstract: Adhesives suitable for securing embossed ductile metal foil to a rigid backing-plate (see Groups VIII and XVI) consist of alkyd resins or mixtures containing them; hardenable phenol-formaldehyde condensation products with a polyvinyl acetal; and mixtures of (a) a polyhydric phenol derivative containing at least two ethylene oxide groups; and (b) a hardening agent.  Examples of (a) are the polyhydric phenols in which two benzene nuclei are connected by a methylene group, e.g. 4 : 41-dihydroxy-diphenyl-methanes. Examples of (b) are the polybasic acid anhydrides, acid anhydrides produced by diene synthesis from maleic anhydride and unsaturated compounds, inorganic or organic bases such as caustic soda, calcium oxide, sodamide, guanidine, diphenylguanidine, piperidine, triethanolamine, piperazine, hexamethylene tetramine, hydrazo-dicarbonimide or salts thereof, cyanamide or its polymerization products, melamine, liquid polyamines such as ethylene diamine or triethylene tetramine and liquids obtained therefrom by heating with dicyandiamide or aromatic diamines; solid hardening agents dissolved in non-volatile solvents may also be used, or mixtures of any of the above hardening agents among themselves or with solvents, ground slate, wood meal, &c.  An interposed fibrous layer is in one embodiment coated with liquid phenol-formaldehyde condensation product (A-stage) and then sprinkled with polyvinyl-formal powder; in another is saturated with a solution, in acetone, of an alkyd resin of acid number about 40 (obtained from the condensation of phthalic anhydride and glycerol) with or without an addition of hexamethylol melamine hexamethyl ether; in another is coated with a mixture of triethylene tetramine with a resin solution consisting of cyclohexanol, dibutyl phthalate and a derivative of 4 : 41-dihydroxydiphenyl-dimethyl-methane containing at least two ethylene oxide groups.
Patent GB-933315-A (GB)
Title: Improvements in or relating to valve devices for controlling servo-devices of the differential air pressure type, particularly for hydraulic brakes
Inventor: CHOUINGS LESLIE CYRIL
IPC: B60T13/24
Filed: 1959-09-28
Abstract: 933,315. Fluid-pressure brakes. AUTOMOTIVE PRODUCTS CO. Ltd. Aug. 30, 1960 [Sept. 28, 1959], No. 32892/59. Class 103 (1). In a servo-assisted braking system for vehicles, a valve device 10 for controlling the servo device 1 of the differential air pressure type is adapted to be operatively associated with a pedal 23 or other operator-operated means associated with a master cylinder 22 so that movement of the pedal 23 causes displacement of the master cylinder 22 to effect operation of the valve device 10 through suitable mechanical linkage 25, 20. The servo device 1 is of the vacuum suspended type having vacuum present in chambers 3, 5 situated one on each side of an annular flexible diaphragm 2 when the apparatus is in its inoperative state shown in Fig. 1, an atmospheric valve head 11 being in its closed position and the valve head 12 being in its open position allowing vacuum to be present in each of chambers 3, 5. When the brake pedal 23 is depressed, the master cylinder 22 is slidably moved to actuate a lever arm 25 connected thereto at 24 about the pivoted connection 26 of the lever arm 25 to a fixed mounting. Movement of arm 25 causes displacement of the plunger 20 and diaphragm 2 connected thereto in order to close the valve port 13 and open valve port 7 to admit atmospheric air to the end 5 of the servo device 1 and cause movement of the diaphragm assembly to effect the servo operation which assist the pedal effort.
Patent GB-271359-A (GB)
Title: Improvements in or relating to gas governing devices
IPC: G05D16/18
Filed: 1926-12-31
Abstract: 271,359. Simpson, J. F., Peebles, W. C., and Peebles & Co., Ltd. Dec. 31, 1926. Addition to 271,134. Valves controlled by pilot valves.-A gas governing device of the kind described in the parent Specification in which a main valve is actuated by compressed air under the control of a pressure actuated exhaust valve has the lever carrying the exhaust valve arranged to control two exhaust ports on conduits leading to opposite sides of the main actuating member. In the form shown in the Figure the main butterfly valve is unloaded and is connected to an actuating diaphragm 3 working in a chamber 4. Compressed air form a reservoir 13 is led through pipes 10, 11 controlled by throttle valves 14, 15 to opposite side of the diaphragm 3 and each pipe has an extension furnished with blow off ports 16, 17. These ports are arranged adjacent to and on opposite sides of a counterbalanced lever 8 connected to a float or piston 7. The float is arranged in the inner compartment of a cell 6 containing liquid and having the outer compartment connected by a pipe 5 to the main conduit 2. A modification is described in which the diaphragm is replaced by a piston.
Patent GB-806787-A (GB)
Title: Improvements in or relating to the production of a high plasma density in the anode region of a low pressure gas discharge
IPC: H01J27/02
Filed: 1955-11-18
Abstract: 806,787. Discharge apparatus. VEB, VAKUTRONIK. Nov. 18, 1955 [May, 10, 1955] No. 33009/55. Class 39(1). An arrangement for the production of a high plasma density in the anode region of a low pressure gas discharge is characterised in that the discharge occurs in a strongly heterogeneous magnetic field, that the cathode or discharge portion serving as a supplier of electrons is disposed in a region of low magnetic field strength, that the anode is constituted by an axially bored disc disposed in a region of higher magnetic field strength, and that the magnetic field lines intersecting the cathode or discharge portion serving as a supplier of electrons converge on the anode bore. A testing apparatus, Fig. 1, for locating leaks in high vacuum equipment with hydrogen as the test gas comprises a glass envelope 6a which is attached to the vacuum equipment and is surrounded by a cylindrically milled-out iron member 7 provided with a permanent magnet 8 and an iron yoke 9. The magnet pole pieces 1 and 2 are located inside the envelope 6a and have axial bores, the walls of which act as cold cathodes. A ring anode 3, arranged symmetrically between the pole pieces 1 and 2, is provided with a lead-in conductor 10. A cylindrical member 6 connecting the pole pieces 1 and 2 is connected to a lead-in conductor 11. Electrons oscillate through the ring anode 3 and the discharge plasma is compressed by the magnetic field with consequent increase of the luminescence, which is further almost doubled by means of a mirror 4, thus enabling the gas which is at a pressure of about 10<SP>-5</SP> Tor. to be analysed by a simple pocket spectroscope 5 arranged coaxially with the anode and cathodes. The arrangement is applicable to ion sources, in which a high plasma density is desirable so that a high density beam of ions may be produced. In the ion source shown in Fig. 2, a thermionic cathode 12 is arranged in a bore in a magnet pole piece 14. The plasma 13 is compressed by the magnetic field between the pole piece 14 and a further pole piece 15 which acts as the anode and is provided with an inlay 16 of refractory material such as molybdenum or tungsten forming the ion emission aperture. In an alternative embodiment the bore in pole piece 14 is lengthened and the cathode 12 is spaced from the bore so that an additional compression of the plasma occurs at the entrance to the bore.