baber/WOPTO huggingface dataset:
Patent GB-1506752-A (GB)
Title: Control system for rectifier equipment
IPC: H02J3/36
Filed: 1975-05-20
Abstract: 1506752 Controlling HVDC power transmission systems ASEA AB 20 May 1975 [10 July 1974] 21443/75 Heading H2F In a control system for a rectifier unit of a HVDC system, the angle of the control pulses for the rectifiers 11 . . . 16 is controlled by a regulating system arranged so that when the voltage of the rectifier unit is increasing the upper limit of the control signal decreases with decreasing control angle. As described, the current and rate of change of current are monitored at 30 and compared with a desired value signal at 33, the error being amplified at 31 and is used to adjust the control angle of the firing pulses by means of a system 4 . . . 19 of the type described in the Specification 1,238,720. This system measures the time interval since the last commutation and normally delivers the next control pulse when this time is equal to the period of the A.C. divided by the pulse number of the rectifier. The signal from amplifier 31 thus acquires the character of a time difference which is added to or subtracted from the time determined by circuit 5. The control signal is limited by means of a diode 9<SP>1</SP> and circuit 8<SP>11</SP> in dependence on the magnitude of the control signal so that in the event of an interrupted cable, e.g. where the inverter at the remote end fails to operate, serious oscillation in the cable is avoided. The proportionality between the change in time interval and the error signal is varied at 100 in dependence on whether the control is increasing or decreasing the voltage. This signal is added at 101 to a bias signal 107 and passed by a switch 102 (closed by each control pulse) to an integrator 103 feeding an upper value limiter 104. Instead of deriving a signal representative of the control angle from unit 101, a summation member 108 may be used to detect difference in signals from details 5 and 6. The invention is applicable to starting the system with the rectifiers at a large control angle, e.g. 90 degrees, which is gradually reduced so as to increase the D.C. voltage until the desired current or power is obtained.
Patent GB-1260617-A (GB)
Title: Improvements in or relating to stabilized base mounts
IPC: G01C21/18
Filed: 1970-05-05
Abstract: 1,260,617. Gyroscopic apparatus; stabilized base mounts. HOLLANDSE SIGNAALAPPARATEN N.V. May 5, 1970 [May 8, 1969], No.21659/70. Headings G1C and G1F. A stable base mount comprises a base member 1 for supporting a radar antenna or a television or infra-red camera, a gimbal system supporting or base member 1 and mounted at the upper end of a hollow column 13, and a gyroscopically controlled servo drive system mounted at the lower end of the hollow column 13 and arranged by way of transmission means 15 in the interior of the hollow column 13 to maintain the base member in a preset orientation. As shown, the base member 1 is pivotally mounted by bearings 7 defining a rotational axis 3 on a gimbal ring 5 which is pivotally mounted about an axis 2 orthogonal to the axis 3 on supports 4 attached to the top of the hollow column 13. A gyro 9 vertically mounted within one of the bearings 7 is arranged to supply signals in accordance with any departure of the gyro's spin axis from vertical and such signals are arranged to drive electric motors 33, 41 Fig. 3 of the servo drive system which are drivably connected by way of gear trains 32, 40 to gear segments 30 and 38. The gear segments 30 and 38 are respectively attached to an outer gimbal ring 27 and an inner gimbal ring 22 which are pivotally mounted about orthogonal axes 23, 24, and the inner ring 22 is mechanically linked by rods 15 to the base member 1 so that driving the segments 30, 38 causes longitudinal movement of the rods 15 to effect such movement of the base member 1 to reduce the signals supplied by the gyroscope 9 to zero. The orthogonal axes 23, 24 are respectively parallel to the orthogonal axes 2, 3 and the outer ring 27 is supported by bearings 28 in fixed supports 25, 26 while the inner ring 22 is supported by bearings 29 in the outer ring 27. The base member 1 is provided with a plate 18 which is connected to a rubber bellows 19 attached to the column 13 to form a housing. A directional gyro 8 Fig. 1 with its spin axis horizontal may be provided for use in correcting azimuthal errors and stop elements 36, 44, 45, Fig. 3 which are co-operable with abutments 34, 35 and 42 and 43 respectively may be provided to prevent excessive fitting of the rings 27 and 22.
Patent GB-774463-A (GB)
Title: Alkaloid derivatives and process for their manufacture
Filed: 1955-07-27
Abstract: The invention comprises reserpic acid esters of the formula <FORM:0774463/IV(b)/1> where Res is the residue of reserpic acid, R is alkyl and R1 is methyl, propyl or butyl; it also includes the compounds (R1=ethyl, R=other than methyl) and salts of all the esters. These are made by known methods from alkyl reserpates or salts thereof, e.g. by reaction with a halide or other functional derivative of an O-carbalkoxy - syringic acid.  Alternatively an alkyl O-syringoyl-reserpate is reacted with the appropriate carbonic acid monoester or derivative thereof, e.g. the chloroformate.  The products are free bases or salts, depending on the method of formation, and one may be converted into the other by normal methods. Salts may be formed with the same acids as in the parent Specification.  Examples are given of the preparation of compounds where R is methyl and ethyl and R1 is methyl, propyl, n-butyl and isobutyl.  Methyl O-syringoyl-reserpate is made as in the parent Specification.
Patent GB-349362-A (GB)
Title: An improved device for stopping rotating bodies, more especially the rotors of electricity meters
IPC: G01R11/58
Filed: 1930-07-18
Abstract: 349,362. Supply meters compensating meters for temperature errors. LANDIS ET GYR SOC. ANON., 1, Hofstrasse, Zug, Switzerland. July 18, 1930, No. 21770. Convention date, July 23, 1929. [Class 37.] A stopping device for the rotors of electricity meters comprises a bimetallic member located in a control circuit and effecting the stoppage in a direct mechanical manner, for example, by a detent engaging a notch in the rotor. The control circuit may be the usual time switch, or load responsive relay. As shown, two bimetallic members 12, 13 are provided to rotate a detent 17 into engagement with a notch 18 on the rotor 19. A third bimetallic member may be provided for temperature compensation. The bimetallic members may be directly or indirectly heated and may function to stop the rotor when they are cold.
Patent GB-823692-A (GB)
Title: Improvements in coal screening devices for domestic coal storages
IPC: F24B15/00
Filed: 1955-07-28
Abstract: 823,692. Rakes. JEALOUS, E. M. E. Oct. 29, 1956 [July 28, 1955], No. 21781/55. Class 6(2). [Also in Group II] A scraper or rake has a handle 17 and a blade 16 with a prong or stud 18 to prod and dislodge slack coal from blocked apertures in a coal screen.
Patent GB-1180346-A (GB)
Title: Process for the Preparation of 2,4-Dimethoxy-Triazines
Inventor: ROBER KARL-CHRISTAN
IPC: C07D251/20
Filed: 1968-05-08
Abstract: 1,180,346. Substituted 2,4-dimethoxy-s-triazines. STICKSTOFFWERK PIESTERITZ VEB. 8 May, 1968, No. 21811/68. Heading C2C. 2,4 - Dimethoxy - s - triazines substituted in the 6-position by a substituted or unsubstituted aromatic, heterocyclic, saturated or unsaturated aliphatic or cycloaliphatic radical are prepared by reacting at 15-150‹ C. a divalent metal salt of imino-bis-carbimic acid methyl ester and a halide of anhydride of a substituted or unsubstituted aromatic, heterocyclic, saturated or unsaturated aliphatic or cycloaliphatic mono- or di-carboxylic acid. The di-basic acids yield bis-triazines linked at the 6-positions by a divalent radical. It is preferred to effect the reaction at 20-60‹ in the presence of a solvent, which may be an excess of the acid halide or anhydride, using the Cu or Zn salt of imino-biscarbimic acid methyl ester. Examples describe the preparation of the 6-methyl and 6-phenyl compounds from acetic anhydride or acetyl chloride and benzoyl chloride.
Patent GB-707472-A (GB)
Title: Improvements in or relating to apparatus for separating liquids
IPC: B01D17/06
Filed: 1951-09-18
Abstract: <PICT:0707472/III/1> In an electrostatic separator for liquids, and in particular for separating the constituents of emulsions as in the dehydration of crude petroleum, a horizontal cylindrical vessel 10 contains a number of pairs of oppositely charged electrodes 16 and 17, and the liquid is discharged downwardly between the electrodes by distributers 25 within the vessel.  The electrodes may comprise a number of pairs of parallel plates on each side of the vessel as shown, in which case the distributers are pairs of openings fed by vertical conduits, or they may comprise two pairs of plates each extending for substantially the whole length of the vessel, when p the distributers are two feed pipes running along the vessel above the pairs of plates and perforated on their undersides.
Patent GB-317359-A (GB)
Title: Improvements in the manufacture and production of diolefines
IPC: B01J19/02
Filed: 1928-02-13
Abstract: 317,359. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Feb. 13, 1928. Divided on 317,303. Diolefines.-In the pyrogenic production of diolefins, especially butadiene and isoprene, by decomposition ot cyclic or acyclic paraffins and higher olefines, the inner surfaces of those portions of the decomposition apparatus in which a temperature of 500‹ C. or more is maintained are covered with firmly adhering melts or sinters of inorganic compounds. The coatings may consist of such salts of alkali-metals, alkaline-earth metals or earth metals or mixtures thereof as melt only at temperatures higher than those required in the process, with or without further additions, e.g. salts of chromium, manganese and copper. Silicates, phosphates or borates may be used, the coating being produced by spreading the compound to be applied over the surface of the vessel, drying and then slowly melting the coating, the vessel being rotated to obtain uniform distribution. Furthermore, the coating may be produced from its components only dur ing the melting process. The manufacture of the diolefines may be effected at ordinary, reduced or elevated pressure, and in the presence or absence of other gases, e.g. nitrogen or steam. According to examples, (1) a coating is obtained by applying several layers of a. paste consisting of potassium hydroxide, potassium silicate, kieselguhr, and water, each layer being dried by exposure to the air, and then heating the coated portions of the apparatus to about 750-800‹ C.; (2) a mixture of sodium hydroxide, kieselguhr, and sodium silicate, solution is applied as in the preceding example; (3) a mixture of water, kieselguhr and potassium silicate is triturated in a ball-mill to obtain a thin even pulp, in which potassium hydroxide is then dissolved: a portion of the pulp is mixed with sodium chromate and applied, after solution of the chromate, to the surface to be protected: after drying, the procedure is repeated several times, the addition of chromate being omitted in the last layers; the mixture melts to a. glossy greenish coating on heating for five hours to 750‹ C. Specifications 269,593. 272,539 (as open to inspection under Sect. 91 of the Acts), [Class 32, Distilling &c.], 296,034, 296,694, 296,752 and 297,398 are referred to.
Patent GB-1092571-A (GB)
Title: New pyrimidines and process for the preparation thereof
IPC: C07D239/48
Filed: 1965-05-24
Abstract: Novel pyrimidine compounds of the Formula I and their acid addition salts, wherein A and A1 are C1- 6 alkylene radicals separating the N atoms by at least 2 C atoms; R1, R11, R2 and R21 are each H or C1- 5 alkyl, or R1 + R2 and/or R11 + R21 represent C4- 8 alkylene or corresponding aza-alkylene or oxaalkylene radicals; R3, R4, R31 and R41 are each H or a C1- 5 alkyl or C1- 5 alkoxy-C1- 5 alkyl radical; Ph an Ph1 are phenylene radicals optionally bearing C1- 5 alkyl, C1- 5 alkoxy, CF3 or halogen substituents and X is a direct bond, oxygen or a divalent C1- 3 aliphatic hydrocarbon radical are made by reacting the corresponding chloropyrimidine compounds of the Formula II, wherein one of the symbols Z and Z1 represents chlorine and the other represents chlorine or-NH-A-N(R1)R2 with an amine NH2-A1-N(R1)R2 <FORM:1092571/C2/1> <FORM:1092571/C2/2> 4,41 - Bis - [4 - b  - aminoethylamino - 6 - methylpyrimidyl - (2) - amino] - diphenyl is made by treating the corresponding bis-b -chloroethyl-amino compound with ammonia in ethanol.  4 - Chloro - bis - pyrimidines of the Formula II are made by reacting a diamine of the formula H2N-Ph-X-Ph-NH2 with a 2 - chloro - (or 2 - methylthio -) - 4 - hydroxy-5 - R4 - 6 - R3 - pyrimidine and exchanging the hydroxy groups in the resulting bis-4-hydroxy-pyrimidylamino-compound for chlorine atoms, e.g. by reaction with POCl3.  Alternatively an amine of the formula H2N-Ph-X-Ph1-Q11, wherein Q11 is a nitro or acetylamino group, is reacted with a 2-chloro-4-hydroxy-5-R4-6-R3 pyrimidine, if desired the hydroxy group is exchanged for a chlorine atom which in turn is replaced by a group -HN-A-N(R1)R2, the nitro or acylamino group is converted to a free amino group and this is reacted with a 2-chloro-4-hydroxy-5-R41-6R31-pyrimidine, followed by chlorination of the 4-hydroxy residue.  Methylthio-pyrimidines, i.e. 4-hydroxy-2-methylthio - 6 - n - propyl - pyrimidine and 4-hydroxy-2-methylthio pyrimidine, are made by reacting the corresponding 2-mercaptans with sodium ethoxide in ethanol. 2-Methylthio-6-methoxymethyl - 4 - hydroxypyrimidine is made by condensing g -methoxy-acetoacetic ester with methyl-isourea sulphate. Pharmaceutical and veterinary preparations for treatment of bacterial infections such as malaria comprise the above compounds of the invention and a carrier, preferably in a form adapted to oral administration.
Patent GB-1292799-A (GB)
Title: Synthetic detergents of high silicate content
IPC: C11D3/08
Filed: 1970-05-06
Abstract: 1292799 Moulding containers RAION YUSHI KK 6 May 1970 [12 May 1969] 21906/70 Heading B5A [Also in Division C5] A container is moulded from a synthetic detergent composition comprising 25% to 95% by wt. of sodium silicate and at least 1% by wt. of a polymeric alcohol, e.g. glycerol or ethylene glycol. The composition may be moulded to form (A) a container with apertures 2 (Fig. 1), (B) a container with air cells 3 (Fig. 2) in which case a foaming agent is present, (C) a package (Fig. 4) which may be filled with synthetic detergents and may be treated with polyvinyl alcohol to improve its gas tightness. In examples, a mixture of 16% sodium alkyl benzene sulphonate, 81% sodium silicate and 3% glycerol is poured into a hollow prismatic mould and heated at 150‹ C. for 30 minutes.
Patent GB-849927-A (GB)
Title: Improvements in or relating to a textile fabric treating bath
Inventor: COBURN ROBERT
IPC: D06B3/10
Filed: 1957-07-11
Abstract: <PICT:0849927/IV (c)/1> <PICT:0849927/IV (c)/2> <PICT:0849927/IV (c)/3> A textile fabric treating bath comprises a plurality of longitudinally spaced rollers extending transversely across the top and bottom of the bath, the bottom rollers being held in a stationary position with respect to the bath, means for maintaining constant tension in the textile fabric which is caused to pass in a sinuous path through the bath, carrier means mounting the top rollers and means capable of reciprocating the carrier means and hence the top rollers in a horizontal direction. As shown, transverse, longitudinally spaced, freely rotatable rollers 37, held in a stationary position with respect to the bath are arranged along the bottom of each bath compartment 10. Carrier means may comprise a transverse carriage 38 preferably provided with bearings, wheels or castors 39 for engagement in guide channels 40.  Rollers 41 similar to 37 are mounted in carriage 38.  Reciprocating means may comprise a double-acting piston-and-cylinder assembly 43 actuated either pneumatically or hydraulically, piston rod 44 being connected to carriage 38, or a pair of assemblies operated in synchronism.  Fabric tensioning means may comprise a transverse roller 23 mounted for limited vertical vibration and located behind feeding rollers 13 adjacent the nip thereof.  Transverse roller 23 may be supported by a pair of arms 24 pivoted to the framework 14, one of the arms 24 being adjustably connected to a downwardly-extending link 25 to the lower end of which is connected a link 26 secured to an outwardly extending bar 27 itself secured to an assembly 28 pivotally mounted to a bracket 29 fixed to a side wall 30 of the bath. Assembly 28 may mount a pair of pulleys 31, 32 whereof the diameters are automatically variable.  Pulleys 18, 31 may be connected by a belt 33, while pulleys 20, 32 may be connected by belt 34.  Spring 35 may interconnect arm 24 and link 26.  Assembly 28 may be provided with handle 28a to permit manual adjustment of the fabric tensioning means.  Roller 23 due to its movement maintains constant tension in the textile fabric during its passage through the bath.  Preferably feeding rollers 13 and roller 23 are so arranged that any variation in the speed of one is automatically transmitted to the other. Fluctuations in tension is transmitted through various arms and links 24 to 27 and assembly 28 to pulleys 31, 32 to vary the diameters thereof and so increase or decrease the speed of rotation of rollers 13 that the initial tension of the fabric is restored.  The bath is provided with water supplying means e.g. spray 36.  In a modification (not shown) carriage 38 may be reciprocated by a cam or eccentric.
Patent GB-596381-A (GB)
Title: Improvements in or relating to the operation of lathe and like machine tool slides
IPC: B23Q5/22
Filed: 1944-11-08
Abstract: 596,381. Turning. DRUMMOND BROS., Ltd., and BLACKLOCK, J. L. Nov. 8, 1944, No. 21998. [Class 83 (iii)] The tool-carrying slide of a lathe or like machine tool is operated by a cam-plate attached to a carrier which is slidable in a recess in the machine bed, intermediary means engaging with the cam-plate and the toolcarrying slide causing the latter to traverse at right angles to the bed. The lathe bed 1 is recessed at 5 and carries a plate 6 which is traversed along the bed by mechanical or hydraulic means. Mounted on the plate and within the recess 5 are a pair of flat cam-plates 7 and 9 which control the motion of a follower roller 10 mounted on a bearing 11 fixed to a slide 12. The slide is mounted in dovetailed guides for transverse movement in a base 2 which is slidably secured to longitudinal ways on the bed by clamping plates 3, 4. The slide 12 is operated towards or away from the work by the cam track and may be operated longitudinally by providing a stop in the cam-track. A tool-holder 27 is carried on a further slide 13 which is mounted on the slide 12 and after adjustment by a screw and hand wheel 15 is clamped by the bolts 14 to the slide 12. The cain carrier and cam-plates are protected. against swarf and dirt by a cover 21 which slides in the lathe bed under the slide 2, and a - plate 24 hinged to the latter and pulled towards the main tool slide by a spring 25, similarly protects the sliding parts connected therewith. Specification 596,382 is referred to.
Patent GB-1485571-A (GB)
Title: Welding wire
IPC: B22F7/00
Filed: 1975-05-22
Abstract: 1485571 Welding by fusion; making welding wire ACIERIES REUNIES DE BURBACHEICH-DUDELANGE ARBED SA 22 May 1975 [22 May 1974] 22088/75 Headings B3R and B3A A welding wire (Fig. 2) comprises a metallic tube (e.g. steel) 2 having a longitudinal weld seam, a powder core 6 and a strip 15 between the core and the tube partially surrounding the core below the weld seam. A protective layer of Al, Cu, Zn, Si, Mg, Mn, Ni may cover the tube while the core can include deoxidizing and denitrating metals such as Al, Mg, Si, Ti, Mn, alloying elements, slag and flux formers, gas-producing compounds and arc stabilizers. One process for producing a welding wire comprises forming an open channel from a steel band 2 by rollers 4, filling the ohannel with a loose powder 6 from a reservoir 7, placing inside the channel to partially surround the core an M-shaped strip 15 formed from a second metal band 12, drawing the composite through a die 20 to draw the edges of the channel together, passing the tube through a burner 21 to remove lubricant supplied by a lubricator 3 and to effect preheating, welding the tube along its seam with a welder 23 and drawing the wire through lubrioators 24, 27 and dies 25, 28 to give the desired diameter, preferably 0À6 mm. The M-shaped strip 15 may be of steel, plastics or paper. The strip 15 may have corrugations transverse to its length which are stretched out when the wire is drawn. The welder 23 can be resistance, induction, inert gas shielded arc, electron beam or laser.
Patent GB-1466749-A (GB)
Title: Grainer lifter
IPC: A01D65/02
Filed: 1974-05-17
Abstract: 1466749 Grain lifter G SCHUMACHER and G SCHUMACHER 17 May 1974 [22 May 1973] 22108/74 Heading A1F A grain lifter for a corn reaping machine comprises a supporting rod 1 adapted to be connected to a reaper and a grain lifting leg 4 which is welded to the rod 1 and has a tapered configuration. The grain lifter is connected, through its supporting rod 1, to a cutter finger fastening bolt 2 and to a cutter finger 3 of the reaper. The lifting leg 4 is of inverted U-shape in cross-section with two leg portions progressively shortening towards the free end. The legs of the U may have their end portions directed towards each other to avoid sharp edges. Also, the weight per unit length of the lifting leg 4 reduces towards the free end. In another embodiment the distance between the leg portions progressively decreases towards the free end of the lifting leg 4.
Patent GB-823590-A (GB)
Title: Piezoelectric crystal supports
IPC: H03H9/09
Filed: 1957-07-12
Abstract: 823,590. Piezo-electric crystal holders. STANDARD ELECTRONICS CORPORATION. July 12, 1957 [July 19, 1956], No. 22142/57. Class 40 (8). A piezo-electric resonator 19 is supported by flexible leads 17, 18 which co-operate with a pair of limit stops 27, 28 to prevent excessive oscillation of the resonator. To prevent transmission of vibrations the leads are bent to the configuration shown and are loaded with balls of solder 23. The limit stops 27, 28 are in the form of loops on the ends of relatively stiff wires 25, 26 of e.g. phosphor bronze. The supporting wires pass through the loops but do not touch them under normal operating conditions. In a modification (Fig. 4, not shown) the resonator is mounted so that no portion of it lies below the level of the stops 27, 28.