baber/WOPTO huggingface dataset:
Patent GB-743440-A (GB)
Title: Masked printing means
Inventor: HARPER MARY APPLEBY
IPC: B29C37/00
Filed: 1953-07-08
Abstract: 743,440. Printing-surfaces. DUNLOP RUBBER CO., Ltd. June 22, 1954 [July 8, 1953], No. 18887/53. Class 100 (2).  A printing-surface comprises a printing layer formed of a pigmented plastic composition 2, e.g. as described in Specification 713,248, having shaped pieces of material 5 embedded in and substantially flush with the surface thereof, the material 5 being insoluble in a solvent of the plastic composition. In examples a sheet of pen-steel or sheet copper of 0.006 inch thickness is etched through to form a pattern so that the metal forms a mask which is embedded in the surface of a roller made of three differently coloured compositions. The roller is then used for printing articles of rubber or polyvinyl compounds by moistening the surface of the roller or article or both with a solvent such as cyclohexanone.
Patent GB-819039-A (GB)
Title: Preparation of photographic emulsions
Inventor: PAUW ALFONS JOSEF DE
IPC: G03C1/015
Filed: 1956-06-19
Abstract: 819,039. Photographic emulsions. GEVAERT PHOTO-PRODUCTEN N.V. June 19, 1957 [June 19, 1956], No. 18914/56. Class 98(2) A photographic gelatino-silver halide emulsion is prepared by forming the silver halide in an aqueous medium in the presence of 2 to 25 parts by weight of gelatin per 100 parts of silver nitrate, the quantity of gelatin not exceeding 3 per cent by weight of the total water present, coagulating to give a powdery precipitate by pouring into an organic liquid miscible with water, washing the precipitate, redispersing it in water and adding the required amount of binding agent. The organic liquid may be methyl acetate, ethyl acetate, methanol, ethanol, acetone or mixtures of these. Alkaline emulsions may be made neutral or acid before precipitation. Chemical sensitizers may be added at the formation stage of the silver halide or during the Ostwald ripening period. It is especially advantageous to add compounds of gold, ruthenium, rhodium, osmium, palladium, iridium or platinum to the redispersed, washed emulsion, before the final gelatine binder is added. In Example 1, aqueous AgNO3 is added to aqueous gelatine containing KBr and KI. After digestion at 45‹C. the emulsion is precipitated by pouring it into acetone. In Example 2, ammoniacal AgNO3 is added to aqueous gelatine containing KBr and KI, and then more aqueous KBr is added followed by ammoniacal AgNO3. Precipitation is with a mixture of acetone and ethanol. In Example 3, aqueous AgNO3 and aqueous NaCl are run simultaneously into aqueous gelatine, followed by ripening and precipitation with acetone. After washing and redispersing in water, aqueous gold chloride is added followed by inert gelatine. In Example 4, aqueous AgNO3 and NH4OH are run simultaneously into aqueous gelatine containing KBr. More aqueous KBr is added followed by ammoniacal AgNO3. Precipitation is with acetone, and the precipitate is washed by twice redispersing it in distilled water and reprecipitating it with acetone. In Examples 1-3, washing is with a mixture of acetone and water, followed by decantation. In all cases the washed precipitate is redispersed in water and gelatine added. In Example 4, aqueous polyethylene glycol mono-stearate is added to the finished gelatine emulsion. In Example 2 of the Provisional Specification, precipitation is effected by pouring into concentrated sodium sulphate solution instead of into an organic liquid. Specification 789,823 is referred to.
Patent GB-878237-A (GB)
Title: Structures of tubes adapted to convey a fluid to be heated by a gas
IPC: F22B37/10
Filed: 1960-05-27
Abstract: 878,237. Steam superheaters. SULZER FRERES S.A. May 27, 1960 [May 30, 1959], No. 18921/60. Class 123(3) In a forced-flow, once-through stearn boiler a lateral nass 2 from the boiler furnace, not shown, leads gases into a downpass 4 locating a reheater tube bank 18 and primary super heater or economizer tube banks 19, 20. The tube banks which each consist of spaced, vertical platens of nested, multiple-bend U-tubes are supported within the downpass on a reticular framework of tubes conveying the working medium. The main supporting system of the framework consists of three rows of vertical tubes 16 which extend from an upper header 17 to a lower header 10. Groups of tubes 11 extend from the header 10 to upper headers 8 and form part of the lining of the downpass side walls 3a. The remainder of the lining is formed by interposed tubes extending from the headers 8 to lower headers 9. To support the tube banks 18, 19, 20 some of the tubes 11 are led out from the remainder on each side wall to constitute horizontal supporting loops 12 ... 15 which are themselves supported by the vertical tubes 16. Thus, as shown in Figs. 4 to 7, the end tube 21 of a group 11 is looped along the front of the group at 24 and then forms two horizontal limbs 26,27 passing on opposite sides of the tubes 16 and supported thereby on brackets 28 welded to the tubes 16. The tubes of the group 18 are held at their correct vertical and horizontal spacing respectively by welded webs 52 and spacer lugs 31.
Patent GB-1301706-A (GB)
IPC: C03B18/02
Filed: 1970-04-21
Abstract: 1301706 Float glass manufacture LIBBEY OWENS FORD CO 21 April 1970 [5 May 1969] 18931/70 Heading C1M In the float glass process the passage of gas into the interior of the float tank through the gap between a tweel 13 and a canal cover is prevented by forcing a gas compatible with atmosphere within the float rank through one of the surfaces of the gap under pressure to maintain a film of gas in the gap. The tweel is surrounded by a pressure duct 45 which has a porous wall 51 facing the tweel and has a manifold pipe 52 mounted within it. The manifold pipe has perforations 53 through which the gas passes. The duct is mounted on a supporting and cooling member 44 by having a conduit 46 mounted within, extending from an inlet connection 47 to a discharge point at the opposite end of the member 44. A cooling fluid such as water passes through the conduit 46 into the member 44 and emerges through a discharge opening 54.
Patent GB-864812-A (GB)
Title: Improvements in or relating to methods of bonding metals to organic plastic materials and articles made thereby
Inventor: STEIN SIDNEY JACOB
IPC: B29C63/48
Filed: 1958-06-16
Abstract: 864,812. Laminates. INTERNATIONAL RESISTANCE CO. June 16, 1958, No. 19169/58. Class 140. A metal having a copper surface is bonded to a layer of a thermoplastic material comprising a solid copolymer of tetrafluoroethylene and hexafluoropropylene by oxidizing the copper surface to provide layers of cuprous and cupric oxide, applying a preformed solid layer of the plastic to the oxidized surface, and applying heat and pressure. Oxidation of the copper surface may be effected by a hot alkaline chlorite solution. Bonding may be effected in a press or between rollers, and any desired number of alternate layers of copper and plastic may be built up. Layers of polytetrafluoroethylene may be bonded to the copolymer layers. The laminate may be used to form a printed circuit, which may be protected by bonding an additional layer of the plastic thereto. Specification 844,776 is referred to.
Patent GB-259182-A (GB)
Title: Heat exchanger
IPC: F28D7/16
Filed: 1926-08-03
Abstract: 259,182. Griscom-Russell Co., (Assignees of Price, J.). Sept. 29, 1925, [Convention date]. Incrustation, removing.-A heat exchanger for use with water liable to form scale comprises a number of units each formed by a pair of headers 10, 11 joined by bowed tubes 12 and spaced apart by angle bars 15, 16 of less expansibility under heat than the tubes, mounted in a framework 23, 24 and connected with one another bv projecting tubes 20, 21. Scale can be cracked off by passing steam through the tubes by pipe 43, the tubes being caused to bow laterally under expansion by cross bars 18 between and above and below the rows of tubes.
Patent GB-449981-A (GB)
Title: Improvements in and relating to means for covering the joins of casing plates of electrically heated stoves
IPC: F24C15/12
Filed: 1935-07-05
Abstract: 449,981. Bolting. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. July 5, 1935, No. 19285. Convention date, July 5, 1934. [Class 89 (i)] [See also Group X] The side plates of electrically heated stoves are connected by a corner strip a of crescent form in cross-section and carrying at its centre screws c which press the plates e against the main side plates to secure them. In a modification, Fig. 8, the corner strip y, s is built up and encloses the heads of the screws. In a further modification the side plates g overlap under the screw heads.
Patent GB-1309986-A (GB)
Title: Location of faults in cables
IPC: G01R31/08
Filed: 1971-06-08
Abstract: 1309986 Locating faults in electric cables PATENTED DEVICES (PTY) Ltd 8 June 1971 [11 June 1970] 19423/71 Heading G1U Apparatus for reducing the resistance of high resistance short circuits in an electric cable, so that they may be detected more easily, comprises two mains transformers 10, 11 whose rectified outputs are applied in series to the cable 14, 15 the secondary winding of the first transformer (10) having a high open-circuit voltage rating but a low short circuit current rating I scl  and the secondary winding of the second (11) having a lower voltage rating but a higher current rating. Initially the cable-receives the full rated voltage of both transformers, but as the fault breaks down the fault current rises above the value I sc l  and the voltage output of the first transformer drops to zero. The second transformer 11, however, continues to supply current to the cable so as to break down the fault still further, the current by-passing the first transformer via its bridge rectifier 12.
Patent GB-672948-A (GB)
Title: Improvements in or relating to apparatus for shaving
IPC: B26B21/40
Filed: 1949-07-23
Abstract: 672,948. Shaving appliances. DAVIES, J. N. July 24, 1950. [July 23, 1949] No. 19451/49. Class 30. In a shaving apliance of the type which includes means for supplying liquid to the skin when the appliance is brought close to the face, manually controlled means for rendering the blade operative or inoperative, at will, are provided. The means for wetting the skin may be a wetting sector or sectors as described in Specification 672,947, and to facilitate shaving one or more wetting strokes, during which the blade is masked, are made between each shaving stroke. As shown a blade 2 is supported on the movable centre part 6 of a base 3 and can be advanced, after the skin has been wetted by a wetting section in an aperture 22 in the casing 4, by finger-pressure on the spring-urged arms 17, from the masked position shown to a cutting position free of the base 3. In modifications the blade is unmasked by the withdrawal of guard members, mounted on pivoted levers, or of a protector plate which is spring-urged down a ramp, formed as part of a retractable frame, or of a protector formed as a longitudinal component of a frame, the lateral components of which are circular arcs sliding in grooves, the blade-carrying head being swivelled or disconnected and rotated through 180 degrees to bring a fresh cutting edge into shaving position. In a further modification the blade is normally in shaving position and is pivotally connected to a frame retractable against spring pressure the blade being honed against a hone surface provided on the lower guard member. Specifications 597,918 and 640,185 also are referred to in the Provisional Specification.
Patent GB-264082-A (GB)
Title: Improvements in worm wheel gearing
IPC: F16H1/16
Filed: 1926-08-10
Abstract: 264,082. Lovelady, H. Aug. 10, 1926. Worm wheels.-In worm wheels, each tooth is so mounted as to adjust itself to the position of the worm and for this purpose is carried on the spherical or rounded end 7 of a pin 3 pinned to the wheel. The tooth is secured in position by a split sleeve 9 and nut 10, play being provided around the pin and the lower edge 14a of the tooth being curved to a smaller radius than the recess 14 in the wheel in the plane shown and to the same radius in the plane at right-angles thereto. The teeth can thus pivot about the longitudinal axis of the pin and also in a direction at right-angles to the length of the teeth about the centre of the end 7.
Patent GB-651351-A (GB)
Title: Earth leakage protection means for underground lighting circuits
IPC: H02H3/33
Filed: 1948-07-22
Abstract: 651,351. Protective cut-out arrangements. SIEMENS-SCHUCKERT (GREAT BRITAIN), Ltd., and LEIGH, F. S. J. July 22, 1948, No. 19676. [Class 38(v)] A number of underground lighting circuits 4, 5, fed from a single-phase transformer 1, the midpoint of whose secondary is earthed, are protected against  earth leakage by corebalance transformers 9, each of which has two primary windings 10, 11 which are magnetically opposed and connected in the supply' leads, so that normally little or no voltage is induced in the secondary winding 12 on the third limb of the core. On fault in one of the circuits, however, the currents in the primaries of the transformer in that circuit become unbalanced and the voltage induced in the winding 12 energizes the trip coil 8 of circuit-breaker 7. Reference has been directed by the Comptroller to Specifications 446,299 and 592,468.
Patent GB-274913-A (GB)
Title: Process for electrolytical precipitation of metals
IPC: C25C1/06
Filed: 1927-07-25
Abstract: 274,913. Sundberg, H. E. July 24, 1926, [Convention date]. Void [Published under Sect. 91 of the Acts]. Chromium, tantalum, and other metals and alloys, depositing; oxides, obtaining.-Chromium is deposited by electrolysis of a solution in water, glycerine or pyridine of chromium compounds in one or more states of oxidation. Suitable compounds are oxy-compounds containing hydrogen, boron, carbon, silicon, nitrogen, sulphur, selenium, tellurium or phosphorus, for example, fluoborate, fluosilicate or selenate. Combinations of the metal with ammonium or pyridine or with sulpho-acids or with complex-forming acids such as boron-tartaric acid and those obtained from naphthalene and its derivatives. Chromium may be present in the form of bromo-chromate or iodochromate. Substances may be added which raise the cathode potential by increasing the viscosity or otherwise, for example, glycerine, sugar, emulsifying substances of an oily nature, gelatine, peptone, quinone, dye-stuffs, alkaloids or their oxidation products; the substances may be added in colloidal form. Aluminium, magnesium and other metal compounds may be added to enable deposition to be carried out at low current density. A suitable concentration of hydrogen ions is maintained by addition of bases or weak acids. Insoluble anodes coated with catalyzers such as lead dioxide. or oxides of manganese, cerium, titanium, thorium, osmium or silver, or with gray or black platinum may be employed. The base of the anodes may be of tungsten or tungsten alloys, chromium alloys, ferro-silicon or copper-silicon. Lead silver anodes may also be employed. The chromium content of the electrolyte may be maintained by addition of the compounds specified above or of chromium trioxide, or by periodic replacement of insoluble anodes by chromium anodes, or by the use of chromium anodes in combination with insoluble anodes, or of anodes of predetermined chromium content. When the electrolyte contains chromium in a lower state of oxidation only and no diaphragm is employed, anodes of graphite, chromium, silicon or steel alloys, magnetite, carborundum or other substance having no oxidizing effect should be employed. The electrolyte may be covered by an inert solid or liquid layer. Gas generated at the electrodes may be removed by suction. An auxiliary alternating current may be passed through the electrolyte. The invention is stated to be applicable also to the deposition of metals of groups IV-VII, for example of tantalum from a partially reduced tantalate, and also of alloys and to the anodic precipitation of oxides.
Patent GB-1378705-A (GB)
Title: Light dimmer
IPC: H01R13/717
Filed: 1973-04-27
Abstract: 1378705 Two-part coupling incorporating dimming systems for electric lamps PERMA RUBBER CO Ltd 27 April 1973 [28 April 1972] 19787/72 Headings H2E and H2H A device for dimming electric lights comprises an electrical plug having pins to engage a socket outlet, the plug housing a circuit arrangement which includes a phase-shift network and a controllable semi-conductor switching element by means of which the illumination of the lights may be controlled. The plug assembly comprises basically a base portion 102, a casing 103 and a base-plate 104 to which are secured the neutral, live and earth pins 105, 106, 107. When assembled the pins pass through apertures 108, 109, 110 in the base portion 102, reference 133 indicating a cord grip. The various circuit elements are mounted on a printed circuit board 115 and are sandwiched between the board and an aluminium heat sink 116 to form a unit which is secured to the casing 103 by passing the threaded boss 117 of a potentiometer 114 (210) through the casing 103 by means of a nut 119, a control knob 120 being fixed to the driving shaft 121. Leads 126-129 interconnect the pins and the components of the control circuit, the capacitor 208 and indicator 209 forming an interference suppressor and a quadrac 206 secured to the heat sink 116 and forming the switching element which controls the current supply to electric lights connected to terminals 203, 204. The quadrac itself is controlled by a phase-shift circuit comprising the potentiometer 210 (114) and a capacitor 211 (111). A resistor 212 is connected in series with the potentiometer and a resistor 213 in parallel therewith in order to give a minimum bias level thus ensuring a certain minimum level of conduction of the quadrac. A fuse 207 (131) is connected between the live pin 106 and the circuit components. In a second embodiment the capacitor 208 is connected to terminal 203 to give enhanced interference suppression and the resistor 213 connected in parallel with both the resistor 212 and potentiometer 210.
Patent GB-1391521-A (GB)
Title: Pumping devices
IPC: B63B13/00
Filed: 1972-04-28
Abstract: 1391521 Self-bailers P H BRAZIER 2 May 1973 [28 April 1972 9 Nov 1972] 18903/72 and 51648/72 Heading B7M A bailing device for a dinghy comprises a duct having a convergent inlet section 5, a divergent outlet section 7 and a passage 11 which, in use, provides communication between a low pressure section 6 of the duct and the interior of the dinghy. The device is mounted on the bottom of the hull with the axis of the duct lying fore-and-aft. When the dinghy speed is sufficiently great, water from inside the hull is drawn through non-return valves 15 by the low pressure in section 6. Fig. 1 shows the device in the normal operative position; it may be pivoted further downwards for increased bailing effect or retracted to be flush with the hull bottom by means of a handle 21.
Patent GB-280832-A (GB)
Title: Improvements in and relating to walls and roofs of portable buildings
IPC: E04B1/61
Filed: 1927-07-26
Abstract: 280,832. Leabank Manufacturing Co., Ltd., and Kent, F. W. July 26, 1927. Stud and slab walls. - Portable buildings of the kind formed of sheets of material clamped between post or rafter members, have the posts formed of two trough-shaped section bars a, one of which is reversed, clamped together along their edges x to the sheets d by bolts e passing between the edges of the sheets. In the form shown, the members are of semi-circular section. Walls. - A wall construction comprises complementary vertical units 1 assembled at both sides of an intermediate sheet or slab 3 formed of insulating or cementitious material. The units 1 may be made of oxychloride cement and wood shavings, ceramic, or cementitious material, and the inner faces are provided with a series of vertical depressions 2. The slabs 1 are arranged between columns 4, each comprising a pair of complemental members 6, providing a central opening 7, and held together by bolts 8. A projection 9 may be clamped between the column members 6 for engaging between a pair of slabs 3, or, if desired, the intermediate slab 2 may project so as to be clamped between the members 6.
Patent GB-314503-A (GB)
Title: Improvements in magnetic optical valves
IPC: G02F1/07
Filed: 1929-06-28
Abstract: 314,503. Electrical Research Products, Inc., (Assignees of Dorff, L. A., and Sandalls, G.). June 28, 1928, [Convention date]. Copying-telegraphs; light-valves.-An optical valve (which may be used, for instance, in a copying telegraph of the kind described in Specification 242,694) utilizes the Kerr or Faraday magneto-optical effects, and comprises a magnetic circuit arranged on the same principle as a Wheatstone bridge. The primary magneto-motive force (corresponding to the battery of a Wheatstone bridge) is provided by a horse-shoe magnet 6 (seen in plan) which is energized to saturation by a coil 5. Branches comprising permalloy sections 9 - - 12 correspond to the four arms of a Wheatstone bridge, while a branch 15, 16, which contains a magneto-optical device, corresponds to the galvanometer branch of such a bridge. The signals derived, for instance, from an amplifier 27 are applied to windings 22, 24 on opposite arms 9, 11 of the bridge, so as to vary the permeability of these arms and consequently the flux in the branch 15, 16. This branch comprises teeth 15, 16 which are longitudinally bored at 17, glass plugs 19, 20 and a tube 21 being provided to form a container for carbon bisulphide or the like. Polarized light is passed from left to right along the bore 17 and through crossed Nicol prisms 32, 33 so as to produce, a record on the drum 35 in accordance with the varying magnetization of the branch 15, 16. The magnetic circuit may be constructed of compressed iron dust or laminated metal, and the balancing of the bridges may be finely adjusted by means of screws 28 by which the material can be compressed. The windings 22, 24 are so arranged that the flux due to them circulates in the sections 9, 10 and does not affect the main magnet 6. A similar result may be achieved by arranging the coil 22 on one limb of the section 9, the opposite limb being in line with the branch 13, as in Fig. 4, or transverse thereto, as in Fig. 3. The coil-less sections 10, 12 may be so designed that the change in their permeability, produced by the disturbance of the flux in response to signals, accentuates the corresponding change in magnetization in the magneto-optic branch 15, 16. Instead of carbon bisulphide, other materials such as dense flint glass, thin films of iron, or a quartz plate may be employed. Instead of passing through a transparent magnetized field, the polarized light may be reflected from the polished pole of an electromagnet.
Patent GB-310714-A (GB)
Title: Knee-control mechanisms for portable electric sewing machines
IPC: D05B69/18
Filed: 1928-07-10
Abstract: 310,714. Fairweather, W., (Singer Manufacturing Co.). July 10, 1928. Sewing-machines; driving.- An electrically driven sewing- machine having a rheostat controller unit as described in Specification 301,237, and operated by a detachable knee lever and a bell crank lever as described in Specification 241,456, [Class 38 (iii), Electric motor control systems &c.], has the unit mounted in a recess in a portable machine with the bearing for the knee-lever behind the wall of the attachment carrying the rheostat. The pullrod 17 of the rheostat 11 has an aperture for engaging one, arm 23 of a bell crank lever pivoted at 22. The other arm of the lever is engaged by a link 27 which is connected to an am 28 on the bush 33. This bush is behind the side wall 32 and is rotated to operate the rheostat by a stud integral with a sleeve 34 having depressions 37, 38. The end 42 of the bent-metal knee lever 36 fits the sleeve 34, Fig. 8, and when rotated a depression 43 engages the depression 38 while the edge engages the depression 37 to rotate the sleeve and operate the rheostat.