baber/WOPTO huggingface dataset:
Patent GB-1114408-A (GB)
Title: Production of styrene polymers
Inventor: GEUNTHER WOLFGANG
IPC: C08F12/08
Filed: 1965-08-27
Abstract: Styrene is polymerixzed with optionally up to 45% by w. of acrylonitrile a - or nuclear-methyl styrene, and mono- or di-chlorostyrene, at 80-180 DEG  C., the polymerization being carried on until the coversion if 45-95% and the remaining monomers and any diluent being removed by degassing in vacuo, and prior to degassing there is added to the polymerization mixture, before or during polymerization, 0.1-5% of an ester of a dimer or trimer of a fatty acid which is oleic, linoleic, linolenic or elaidic acid, with a C1- 18 alcohol and/or an ester of a C18 acid with an alconol which has been obtained by hydrogenation of the above dimer or trimer and/or an alcohol which h as been obtained by hydrogenation of the above dimer or trimer.  the polymerization may be carried out in the presence of up to 50% of diluent e.g. ethylbenzene.  The ester may be te butyl or ethylhexyl ester of the fatty acid. The polymerization may be continuous.  The styrene may be polymerized in the presence of a rubber comprising 25% styrene and 75% butadiene.
Patent GB-1495848-A (GB)
Title: Rectifiers
IPC: H01L23/36
Filed: 1976-04-09
Abstract: 1495848 Semi-conductor rectifiers P B JAQUES 9 April 1976 [9 Sept 1975] 36935/75 Heading H1K A rectifier comprises a first diode-supporting plate 4, a second diode-supporting plate 6 which is smaller than and positioned on top of the first plate 4 in spaced-apart partially overlapping relation, and diodes 10-20 on the plates 4, 6, the diodes 10, 12, 14 being provided on the non-overlapped part of the plate 4 and one diode on each plate forming pairs of diodes connected by phase conductors 28, 30, 32. A third diodesupporting plate 8 is mounted above the second plate 6 so as to partially overlap it, and diodes 22, 24, 26 on it are connected to the pairs of diodes by the phase conductors 28, 30, 32. The diodes, e.g. 10, 16, of a pair are oppositely connected and the A.C. current is fed in by wires 34, 36, 38, one current phase being connected to each diode pair. The rectified output is available at terminals 72, 74, 76, 78 integrally formed with the plates 4, 6, 8, or at terminals 54, 58 supported by a spindle 40 on which the rectifier stack is mounted.
Patent GB-344906-A (GB)
Title: Improvements in and relating to electric discharge devices
IPC: H05B41/24
Filed: 1929-12-03
Abstract: 344,906. Metallic-vapour apparatus. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Foulke, T. E. ; 30, Evelyn Place, Nutley, New Jersey, U.S.A.) Dec. 3, 1929, No. 37021. Convention date, Dec. 3, 1928. [Class 39 (i).] An electrodeless discharge device which is energized by means of a highfrequency field, is provided with a condensing chamber to control the pressure of the vapour filling and to increase the intensity of the discharge. A lamp comprises a spherical discharge chamber 1 of fused silica, connected to a condensing chamber 2 by means of tangential passages 3, 4. The condensing chamber is at a considerable distance from the chamber 1 to minimize the amount of heat intercepted. The device is supported by a lever 13, which is pivoted at 12 to a support 11, and is fitted with a spring- dog 18 which yieldingly engages with serrations 17 in a support 16. The surface area of the mercury exposed to the discharge is varied to control the vapour pressure by tilting the device by means of the lever 13. During discharge, mercury is continuously vaporized to flow through the chamber 1 and the passage 3 to the condensing chamber. The rate of cooling of the chamber 2 may be influenced by fitting thereon an asbestos sheath or a metallic sheath which may have cooling fins. To facilitate starting, the filling may contain one or more inert gases as described in Specification 269,161, [Class 39 (i), Electric lamps, Arc &c.]. In evacuating the device, it is initially exhausted, the mercury is then introduced, and it is again exhausted and heated while a discharge is passed.
Patent GB-754926-A (GB)
Title: Portable time stamp
IPC: B41K3/10
Filed: 1954-12-22
Abstract: 754,926. Hand stamps. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 22, 1954 [Dec. 29, 1953; Jan. 18, 1954]. No. 37028/54. Class 100 (2). A time stamp comprises a base portion 11 and a stamp portion 10 removably carried thereby, a clock or the like 16 in the base and magnetic coupling means between a spindle 15 rotated by the clock and a spindle 23 carrying a stamp 39 at the lower end and a time-indicating member 25 at the upper end. The base is formed with an upwardly extending wall 13a with sloping inside surfaces for co-operation with mating surfaces on the side walls of the stamp portion 10. By this means the stamp portion, when replaced, is always guided accurately back into the position where the spindles 15 and 23 are aligned. Mounted on the end of spindle 15 is a magnet 18 adapted to co-operate with a similar magnet 33 on the lower end of spindle 23. Spindle 23 is axially slidable and spring loaded towards an upper position in which a disc 31 carried thereby engages a stationary flange member 24a. This prevents rotation of the spindle when the stamp portion is separated from the base portion. When the magnets 18, 33 are brought together in the position shown the spindle 23 is drawn down against the spring 28 and freed for rotation. A small air gap is preserved between the magnets by contact between a stop plate 19 and an end 23c of spindle 23. The attraction between the magnets causes the spindle 23 to rotate with the spindle 15 according to the movements of the clock. In the arrangement described the lower plate 36 of the stamp portion is provided with a rubber type face bearing twelve numerals 37 forming a clock dial surrounding the spindle 23. The stamp 39 is in the form of a pointer and is attached to a disc 32 on the spindle 23 so as to rotate therewith. The spindle 15 is geared to the clock mechanism so as to rotate once every twelve hours. Also provided in the stamp portion is a series of manually operable rollers 48 controlling type carrying bands 50 adapted to print the date and a.m. or p.m. as shown in Fig. 4. Other types 56 are secured to the plate 36 for printing an address or the like. All the types except the time-indicating stamp 39 are inked from a pad 20. The stamp 39 is connected to a permanently inked pad 38. A plate 25 rotating with spindle 23 has a pointer 42 indicating the time by co-operation with twelve hour markings 40 on the upper face of the stamp. The plate 25 is covered by a window 43.
Patent GB-369590-A (GB)
Title: Improvements in or relating to methods of and devices for securing members on shafts or the like
IPC: F16B39/22
Filed: 1930-12-08
Abstract: 369,590. Locking nuts. DIGNAN, E. M., 1, Cale Street, Chelsea, London. Dec. 8, 1930, No. 37029. [Class 89 (i).] In locking means for preventing the screwing back of a nut, or the slackening back of a member already keyed or screwed to a shaft of any cross section, a tapered groove A, having undercut sides tapering towards the bolt-end, is cut in the shaft or bolt B, and a material such as malleable,metal is caused to flow into the groove either under pressure, such as by hammering or by the application of heat, so as to form a wedge D compressed into the taper of the groove and against the nut C or other member to be secured. Several wedges may be used to fill the groove, or a single relatively hard wedge may be hammered into it, or a main relatively hard wedge may co-operate with auxiliary malleable wedges which fill the gap between the end of the main wedge and the face of the nut. This gap may alternatively be filled by flowing molten metal into it. The member to be secured may also have a groove positively engaging the wedge. For small bolts two or three complete threads may be left at the outer end of the groove as shown. Alternatively the groove may be taken to the end of the bolt and have its outer end filled with metal after insertion of the wedge. The wedge may itself be secured by a dowel at one or both ends extending into the bolt or by binding rings engaging grooves in its face. Reference has been directed by the Comptroller to Specification 26327/08, [Class 89, Nails &c.].
Patent GB-801133-A (GB)
Title: Improvements in or relating to dish covers
IPC: A47G19/26
Filed: 1954-12-23
Abstract: 801,133. Collapsible food covers. DINGER, A. Dec. 23, 1954 [Dec. 29, 1953], No. 37151/54. Class 128 A dish cover capable of being opened or closed by one hand only consists of supporting ribs 3 pivotally secured to a plug 2 and distending ribs 5 secured to lugs on a plate 6 fixed on a spindle 1. In operation the thumb is inserted into the ring 1a at the upper end of the spindle and two fingers grip either side of the plug 2; downward pressure on the spindle with the thumb then causes the cover to open.
Patent GB-1033771-A (GB)
Title: Improvements relating to the filtration of suspension of dyestuffs
Inventor: CHERRY GEORGE BARRATT
IPC: C09B67/54
Filed: 1961-10-17
Abstract: An aqueous suspension of particles of a water-soluble dyestuff is produced in a form which suitable for efficient filtration by adding an alkyl-(or hydroxyalkyl) cellulose to the aqueous solution of the dyestuff, and then adding an electrolyte to gel the cellulose and precipitate the dyestuff.  The preferred alkyl celluloses have an average alkylation of about two alkoxy groups per anhydroglucose unit.  Methyl, ethyl, and hydroxypropyl methyl cellulose are specified.  Gel-formation and precipitation of the dyestuff is brought about by heating and by adding an electrolyte. In an example, a suspension of 0.8 parts of methyl cellulose in about 8 parts of hot water is added to 440 parts of an aqueous solution of a "reactive" dyestuff of the anthroquinone/triazine type.  The mixture is stirred at 15 DEG C. until the methyl cellulose has dissolved.  The solution is then heated to 65 DEG C.; 100 parts of sodium chloride are added during 15 to 30 minutes, and the mixture is stirred for 3 hours at 65 DEG C.  The filtration of the mixture through filter paper took less than 1 minute.  Filtration may also be carried out using synthetic (e.g. nylon) cloth.
Patent GB-1359776-A (GB)
Title: Vending machines
IPC: A47J31/40
Filed: 1972-08-09
Abstract: 1359776 Liquid dispensing apparatus; beverage machines SERVOMAT FAST FOODS (PTY) Ltd 9 Aug 1972 [17 Aug 1971; 13 April 1972 (3)] 37226/72 Headings A4E and A4T [Also in Division B1] A beverage dispensing machine has a dispensing device 16 for infusions e. g. of tea or coffee Figs. 1 and 4, which comprises a container, at least one jet 22 located to discharge into the container to cause circulatory movement, in the container, of liquid passed through the jet, and an outlet 21 which is one enabling the period of sojourn of the liquid in the container to be controlled. The outlet may be a siphon, as shown, or may merely be a valved conduit, or a conduit leading to a pump. A second inlet jet 23, preferably producing an opposite circulatory effect to the first jet 22, may be provided. To prepare an infusion in the apparatus shown, coffee grounds or tea leaves are introduced into container 16 via a solenoidoperated sliding lid in the top (not shown), the lid is closed, boiling water is introduced via jets 22 and 23 to bring the level to just below the bend in the siphon. Heater ring 24 then produces some steam from the liquid, and the liquid infuses. More water is then poured in through jets 22, 23 to force out the liquid and entrained solids to a separator 17, Fig.1. This is formed by a screw conveyor in a tube, part of the tube wall having a strainer Fig. 7, (not shown). The infusion is then fed to a cup from cup-supplying device 5. The other colums of the vending machine may contain soluble ingredients, and be prepared by conventional whippers 13. The containers for solids may have a square cross-section shaft 39 Fig. 8 controlling dispensing means 37, 38, the shaft also carrying angularly spaced springs 42, which are also spaced along the shaft. The springs have weights, e.g. screws 43, in their free ends and serve to prevent compaction of the contents.
Patent GB-1056427-A (GB)
Title: An elongate composite web of electrically insulating material
IPC: H01F27/32
Filed: 1963-09-23
Abstract: 1,056,427. Transformers. LICENTIA PATENT - VERWALTUNGS - G.m.b.H. Sept. 23, 1963 [Sept. 24, 1962], No. 37308/63. Heading H1T. An insulating web (for making transformer angle rings) includes a longitudinal strip or strips 15, 16, Fig. 3, of insulating material, and a further strip 17 wrapped around them to form transverse layers, each fastened by gluing, fusing or friction, along one of its edges to the longitudinal strips such that it overlaps several adjacent transverse strips. The web may be formed on a carrier member 18, and separate longitudinal strips of different widths 16, 20, Fig. 5 (not shown), may be used, the assembly then being cut along the edges of the carrier member to give two webs. A plurality of longitudinal strips 34 to 39, Fig. 6 (not shown), may be interleaved with the transverse wrappings 29, 30, 31, and a pair of webs 67, 68, Fig. 10 (not shown), may be assembled back-to-back with the longitudinal members 69, 70 on the outside. Angle rings may be made by forming a web into a cylinder about an axis perpendicular to the longitudinal members, and then folding down the end portion to form a flange, Fig. 8 (not shown). The flange and cylindrical parts, which may be of plastic being reinforced with presspahn discs 54, 55 and cylinders 48, 49.
Patent GB-1500246-A (GB)
Title: Method for the preparation of n-phenyl-2-naphthylamine
IPC: C07C209/18
Filed: 1976-09-09
Abstract: 1500246 Preparation of N-phenyl-2-naphthylamine and optionally with 2-naphthol NOVOSIBIR INST ORGANICHE KHIM SIBIR OTDELE AKAD NAUK SSSR and RUBEZHAN KHIMI KOMBINAT USSR 9 Sept 1976 37371/76 Heading C2C N - phenyl - 2 - naphthylamine is prepared by reacting a sodium salt of 2-naphthalene sulphonic acid with aniline at a temperature within the range of from 180‹ to 400‹ C. for a period of from 0À5 to 60 hours in the presence of at least one compound selected from hydroxides of alkali metals and salts of alkali metals, simultaneously separating the resulting reaction water.
Patent GB-1107894-A (GB)
Title: Compartmented container and method of preparing ready-for-use mixtures
IPC: A61C5/66
Filed: 1965-09-01
Abstract: 1,107,894. Ampoules. ETABLISSEMENT DENTAIRE IVOCLAR. 1 Sept., 1965 [2 Sept., 1964; 29 March, 1965], No. 37393/65. Heading B8C. Two inter-reacting substances are stored in a container divided into two compartments by a thin rupturable foil, the container being in two parts which are telescopically movable together to rupture the foil to thereby allow the substances to mix. In one embodiment, a pulverulent substance is placed in the compartment 1, Fig. 1, and a liquid substance 3 in a foil bag 4, which is held between an apertured insert 2 and a piston or cap 5. To mix the substances the bag is burst by forcing the piston down on to it, the liquid flowing through the aperture in the insert 2 into the compartment 1. To facilitate the bursting of the bag, the lip of the aperture in the insert 2 may be raised, Fig. 2 (not shown), or a prong, Fig. 3 (not shown), may be provided on the insert 2, apertures being arranged round the root of the prong. Alternatively the liquid substance may be contained in an annular bag 3, Fig. 4 (not shown), the insert 2 being omitted and the bag being burst by pressure on the cap 2. In a further modification, Fig. 5, the cap 5 is dished, the liquid 3 being contained in this recess by a foil welded to the cap. The top of the insert is then shaped to form a piston to facilitate breaking of the foil. The container and dividing foil may be made of metal, glass, plastics, gelatine or cellulose, and the inner wall of the container may be coated with wax, lacquer or paraffin or provided with an insert sleeve. The separating foil may be made of the same material as the container or may be made of impregnated paper. The two substances may be phosphoric acid and zinc oxide.
Patent GB-339489-A (GB)
Title: Manufacture of halogenated 4:5:8:9-dibenzopyrene-3:10-quinones
Filed: 1929-12-06
Abstract: 339,489. I. G. Farbenindustrie Akt.- Ges. Dec. 6, 1928, [Convention date]. Dibenzpyrenequinones. - 4 : : 5 8 : 9 - Dibenzpyrene-3 : 10-quinones containing both chlorine and bromine atoms are made by chlorination of brominated dibenzpyrenequinones or by bromination of chlorinated dibenzpyrenequinones. In examples, (1) dichlor-4 : 5 : 8 : 9-dibenzpyrene-3 : 10-quinone. obtained by treating 1 : 4-di-p-chlorbenzoylnaphthalene with sodium-aluminium chloride, is brominated in chlorsulphonic acid in presence of iodine, the product dyes cotton clear scarlet tints, (2) monochlor-4: 5 : 8 : 9-dibenzpyrene-3 : 10-quinone, obtained from 2-p-chlorbenzoylbenzanthrone by treatment with sodiumaluminium chloride, is brominated in chlorsulphonic acid in presence of iodine: the product dves in bluish-red tints, (3) dibrom-4 : 5 : 8 : 9- dibenzpyrene-3 : 10-quinone (example 2 of Specification 287,845) is chlorinated in chlorsulphonic acid in presence of iodine; the product dyes in clear orange-red tints, and (4) dibrom-4 : 5 : 8 : 9- dibenzpyrene-3 : 10-quinone. obtained by treating 1 : 4-di-p-brombenzoylnaphthalene with sodiumaluminium chloride. is similarly treated: the product dyes in somewhat yellower shades than that of example 3. Specification 338,747 also is referred to.
Patent GB-952574-A (GB)
Title: Improvements in or relating to transparency changing devices for optical projectors
IPC: G03B23/04
Filed: 1962-10-04
Abstract: 952, 574. Magazine slides changing apparatus. ERNST LEITZ G. m. b. H. Oct. 4, 1962 [Oct. 19, 1961], No. 37499/62. Heading G2J. An automatic slide changing device comprises a slider 1 with a U-shaped member 4 which engages slide 3, and a motor-driven switching plate 8 which moves slider 1 to the left from the initial projection position shown against the tension at spring 12 passing over roller 13 until slide 3 reenters magazine 5 which then advances the next slide into member 4, slider 1 being returned to the projection position by spring 12 alone. An eccentric pin or plate 8 is connected by arm 9 to pivoted lever 9 whose end carries pin 10 engaging abutment face 11 on slider 1 which is thereby moved by rotation of plate 8. Magazine 5 is advanced by the engagement of rack 6 with pinion gear 7 which is incrementally rotated by inclined member 15 passing between its teeth once in each revolution of plate 8. If the apparatus jams, spring 12 absorbs any stresses.
Patent GB-935944-A (GB)
Title: Improvements in and relating to apparatus for infinitely varying the speeds of of two shafts
IPC: F16H37/00
Filed: 1959-11-06
Abstract: <PICT:0935944/IV(a)/1> <PICT:0935944/IV(a)/2> <PICT:0935944/IV(a)/3> <PICT:0935944/IV(a)/4> <PICT:0935944/IV(a)/5> Relates to a continuously-variable-speed winding gear for maintaining constant linear tension and speed of a web 12 of paper or fabric being fed through a cutting or dyeing machine between idle rollers 13 by being unwound from one roller 11 and wound on to a take-up roller 10, both rollers being driven through chains 14, 15 respectively by separate driven shafts 3, 4 of the variable-speed gear, each of which shafts 3, 4 carries an expanding coned pulley 3b, 4b, connected by a common driving V-belt 5 or chain with a similar expanding pulley 2b on a single input shaft 2 driven by a constant-speed motor 8.  Constant web tension is maintained as the roll diameters vary by inversely varying the speed ratio between the two driven shafts 3, 4 by common control levers 7 on fixed pivots 6 which open one pulley as they close the other, and are actuated through a servomotor by a compensating reel, sensitive to change in the free length or tension of the web 12.  This alone is inadequate to maintain constant linear speed of the web, for which purpose the speed of the driving belt 5 is caused to vary in accordance with variation in the speed-ratio between the two driven shafts 3, 4, by controlling the diameter of the constantspeed input pulley 2b either manually or automatically. Belt tension is maintained by springloaded shoes 9 or rollers.  In one modification, Fig. 3 (not shown), the driving expanding-pulley 2a, 2b has its effective diameter independently adjusted for ratio change by mounting the driving shaft 2 in levers pivoting at one end and connected at the other to a hand operated screw which is turned to move the driving shaft towards or away from the two driven shafts 3, 4.  In another modification, the angular adjustment of the levers 7, Figs. 5-7, is controlled by rotation of a spindle 30 carrying a sprocket 31 connected by pivoted links 32 to the ends of the levers. The separation of the flanges of the driving pulley 2b is simultaneously controlled by levers 34 pivoting at 33 and connected by links 37 to a sprocket 36 on a spindle 35, a chain 38 connecting the sprockets.  The arrangement of the links 37 is such that when rotating the spindle 30 from one extreme position to the other, the levers 34 first incline in one sense relatively to each other, and then in the other sense, so than an increase followed by a decrease of the effective diameter of the driving pulley is effected, while the levers 7 move in the same sense.  As a modification, the belt or chain tensioning may be effected by a torque-responsive cam-and-ball arrangement, Figs. 4, 8 (not shown).
Patent GB-1026196-A (GB)
Title: Improvements relating to frequency meters
Inventor: DEATH PHILIP JOHN
IPC: G01R23/02
Filed: 1961-10-23
Abstract: 1,026,196. Frequency detectors. RECORD ELECTRICAL CO. Ltd. Oct. 15, 1962 [Oct. 23, 1961], No. 37856/61. Heading H3A. A.C. is applied over capacitor C1 to a series pair of back-to-back Zener diodes Z1, Z2 and the resulting rectangular waveform of constant amplitude applied to charge oppositely and alternately a capacitor C2, via rectifiers MR1, MR2 respectively, one (MR2) energizing a meter M indicating frequency. A further rectifier MR3 and circuit R1, C3 back biases the meter deflection. A low voltage Zener diode Z3 back biases rectifiers MR1 and MR2 to prevent the meter back bias voltage from rectifier MR3 being shunted to earth.