baber/WOPTO huggingface dataset:
Patent GB-725053-A (GB)
Title: Production of impermeable bodies of graphite
IPC: C04B35/52
Filed: 1953-05-29
Abstract: A body of graphite impermeable to liquids and gases is prepared by treating at least a part of the surface of an artificially produced graphite body with graphitic acid, or a salt thereof with a volatile base, in a liquid medium, evaporating off the liquid medium, and converting the graphitic acid or salt to graphite. The liquid medium, for example water, may contain 0.1 to 3 per cent of graphitic acid as a solution, sol or emulsion.  The conversion to graphite may be carried out at a temperature between 130 and 200 DEG C., preferably in a reducing atmosphere, for example in hydrazine vapour.  The initial graphite body may be produced by compressing carbon powder followed by a heat treatment.  The body may be machined either before or after treatment with graphitic acid, preferably before the conversion to graphite. Parts of the graphite body not impregnated with graphite may be impregnated with other substances, for example copper, to facilitate soldering to metal parts.
Patent GB-438444-A (GB)
Title: Improvements relating to the electric insulation of wire
IPC: H01B3/10
Filed: 1934-05-18
Abstract: Insulating oxide coatings are produced on wires, ribbons, strips, &c. made of alloys containing nickel and chromium, such as nickel-chromium alloys or nickel-chromium-iron alloys, by coating the wires &c. with an aqueous solution of an alkali metal base, e.g. sodium or potassium hydroxide, and then roasting the wires in an oxidizing atmosphere.  The solution of alkali metal base is preferably a viscous solution containing 40-50 per cent by weight of sodium hydroxide.  The wire may be annealed before coating with the alkali metal base, or the annealing may be effected simultaneously with or subsequent to the oxidizing roast.  In the latter case the annealing temperature should not exceed 1650 DEG  F. The treatment may be a continuous one in which the wire &c. is drawn through the alkali bath and then through the oxidizing furnace, in which case the furnace temperature is 1000-1800 DEG  F., or a batch treatment may be used with the wire in the form of coils in which case the furnace temperature is preferably between 750 and 1100 DEG  F.  When treating coils by the batch treatment the oxidized coils are allowed to cool and then washed with hot water, with or without a preliminary washing with dilute acid, the coils being beaten during the washing to loosen any adhering sludge. The coils are then dried, e.g. by centrifuging followed by the action of a gas or steam heated drier, and may then be annealed at, for example, 1550-1600 DEG  F. in an excess of air. The annealing is followed by air cooling, washing, and drying.  The treatment of wires &c. made of alloys containing (a) 60 per cent nickel, 15 per cent chromium, and the balance iron, (b) 80 per cent nickel and 20 per cent chromium, (c) 18 per cent chromium, 8 per cent nickel, and the balance iron, is referred to.  The alloys used contain at least 50 per cent of nickel and chromium together or of nickel, chromium, and iron together, and neither the nickel content nor the chromium content is less than 5 per cent.
Patent GB-552099-A (GB)
Title: Improvements in or relating to jogging machines for arranging sheets in one or more piles
IPC: B65H31/40
Filed: 1941-11-22
Abstract: 552,099. Sheet delivery apparatus. BRACKETT, F. M. Nov. 22, 1941, No. 15061. [Class 100 (i)] A jogging mahcine for straightening sheets as delivered to form a stack in which the edges are registered correctly is constructed so as not to transmit vibrations to the building structure carrying the machine. The table 19, Fig. 1, on which the sheets are received is supported from a lower table 15 by means of flat springs 47 secured by screws to the parts 15, 19. The table 15 is mounted in parts 13, 14 are mounted in a flat open base 2 fitted with wheels 6, 7 which can be lowered to floor level when it is desired to move the whole device. The upper table is supported as shown in Fig. 6 at an angle to the table 15, the long side of the table 15 being parallel to a diagonal of the table 19, and the table 19 is reciprocated parallel to this long diagonal by means of eccentrics 63 on a shaft 55 driven by a belt 59 from a pulley 60 driven by a motor 60 controlled by a switch 91 operated by a treadle 93. The eccentrics 63 have a yielding connection with rocker arms 73 provided with weighted ends 74 which act to damp vibrations. The arms are mounted on needle bearings 71, and the arms 73 are connected by springs 86 and clamping blocks to brackets 83 on the table 19. The edge of the sheets are thus moved alternately against registering posts 54 at adjacent edges of the table as the table i s jogged by the eccentrics. To prevent the guide edges of the sheets from curling and climbing up the post 54, hold-down wire clips 97, Fig. 10, are fitted to slide on some of the posts and they bear on the top of the pile. Bent parts 99 of the clips engage the front edges of sheets added to the pile and straighten out curled edges. One table may be arranged to receive two or more piles of sheets which are arranged in echelon on the table, the jogging motion being parallel to the diagonals of the sheets of the piles.
Patent GB-860250-A (GB)
Title: Improvements relating to collapsible or knock-down crates
Inventor: HUDDART WILLIAM
IPC: B65D6/16
Filed: 1958-05-12
Abstract: 860,250. Crates. LLOYDS MACHINERY PACKING CO. Ltd. May 7, 1959 [May 12, 1958; July 4, 1958], Nos. 15135/58 and 21458/58. Class 18. [Also in Group XXV] A wooden crate to contain a motor vehicle or a tractor can be collapsed when it is to be returned empty and has one side that hinges outwardly to a horizontal (see Fig. 5) to enable a driver to open the door of the vehicle after driving into the crate. The base comprises longitudinal and transverse members with side pieces 1 and rails 4 that guide the vehicle. One side hinges on to the base when collapsed but the other side has hinges enabling it to fold inwardly or outwardly. One end 14 is detachable and the opposite end hinges down on to the base. A lid 17 is made of tongued and grooved boards and is positioned by upstanding parts 7a, 8a of the sides and ends ; lugs 20 for lifting the lid on and off are provided. The crate is held together by inter-engaging corner members 15, 16. A transverse strut 21 across the top is provided. A member 5 on the underside of the base. provides clearance at the ends for slings to be passed beneath the crate. According to the second Provisional Specification the longitudinal side pieces 1 may be of different height so that the two opposite sides lie flat upon each other when the crate is collapsed. having a limb 1 secured to one of the parts 7, 9 to be connected and having an offset tongue 3 to overlap, the complementary limb 2 of the other angle member. The angles between the limbs 1, 2 may be other than right angles and the devices, which are made in right and lefthanded pairs, can be constructed for use on external angles by oppositely directing the limb 2.
Patent GB-376432-A (GB)
Title: Process for the production of masses, which are pervious to liquids and gases, from rubber and like substances
IPC: C08L7/00
Filed: 1931-05-22
Abstract: A natural or artificial aqueous dispersion of rubber to which has been added vulcanizing agents, accelerators, &c. is mixed with a relatively small proportion of pulverulent filling materials having moisture-repelling properties and an irregular surface, and with substances which will transform the mixture into a homogeneous coagulum; a coagulum is formed and vulcanized in the presence of water or steam to produce a porous mass suitable for filtering &c. purposes.  Suitable fillers are silica gel, carbon, water-repelling vegetable fibres, rubber dust or ground microporous hard rubber.  For coagulation, particularly suitable are those substances which, in the quantities employed, effect coagulation only on warming, or after long standing.  Such include zinc ammonium salts, and mixtures of powerful coagulants as acids or salts of polyvalent metals and protective substances, e.g. sodium salts of aromatic sulphonic acids or condensation products of formaldehyde and naphthalene sulphonic acid known as "Leucanol," or "Tamol."  Buffer substances such as sodium acetate may be employed to repress the coagulating effect of acids.  The permeability can be regulated by the duration of heating in coagulation or by the pressure of vulcanization, increase of either diminishing the porosity.  Rolling of sheets prior to vulcanization increases the permeability.  Numerous examples are given in the Specification; the following is typical: 10 kg. of concentrated latex containing 75 per cent solids (Revertex) is mixed with 1875 gm. of hard rubber dust containing 35 per cent of sulphur, 37.5 gm. of zinc oxide (Cadox), 18,5 gm. of piperidine pentamethylene dithiocarbamate, (Vulcazit P), 37,5 gm. of tetramethyl thiuram disulphide (Thiuram), 150 gm. of sulphur, and 1800 cc. of 2N ammonium chloride solution. The mixture is poured on to glass plates heated to 80 DEG  C., and after 10 minutes is vulcanized in water at 3,5 atmospheres in 45 minutes.  An excess of sulphur produces stiffer products. Strength may be increased by embedding reinforcements or edgings. Large plates may be made by cementing together smaller ones, using the coagulum as adhesive.
Patent GB-210350-A (GB)
Title: Improvements in ladders
IPC: E06C1/32
Filed: 1923-06-12
Abstract: 210,350. St. Clair, H. A. June 12, 1923. Ladders.-Convertible long and step ladders have hinge members secured to the ends of the separate portions, these hinge members having overlapping offset portions 15 through which passes a pivot pin 16. The circumferences of the overlapping portions are provided with slots or grooves 23, 24 which are adapted to come into alignment for the two positions of the ladders and be held there by spring-actuated locking levers 19 pivoted to the sides of the lower ladder member. The top step 6 of the ladder is formed as a platform with strengthened edges 26, Fig. 6, and is supported by bracket members 28. The joints between the bottom step and the ladder sides are strengthened by angle-brackets 40.
Patent GB-415546-A (GB)
Title: Improvements in and relating to electric valve circuits
IPC: H02M1/04
Filed: 1933-05-27
Abstract: 415,546. Converting; changing phase. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Bedford, B. D. ; 329, Germania Avenue, Schenectady, New York, U.S.A.) May 27, 1933, Nos. 15375 and 15376. Convention dates, May 27, 1932. [Class 38 (ii).] In an electric power conversion apparatus, the transformer supplying the alternating control potential is loaded during the half cycles when the control potential is negative with respect to the cathode of the discharge device, by a rectifier connected, if desired, in series with a resistance. In Fig. 1, energy is transmitted from a D.C. circuit 10 to an A.C. circuit 11 through the parallel inverter arrangement comprising discharge devices 15, 16 and the transformer 12. The control grids of the valves are energized from the circuit 11 through a phase adjusting arrangement 19 and a selfsaturating grid transformer 20. The arrangement 19 comprises an inductive winding 21 and a reactor 22 and variable resistance 23 connected in parallel therewith. The junction of the reactor and resistance and the mid point of the winding 21 are connected to the primary winding 24 of the transformer 20. The core of the latter has a non-saturating branch 37 with an air gap 38 and legs 25, 26 upon which are mounted the secondary windings 251, 261. The alternating potentials of peaked wave form derived from the windings 251, 26', are applied to the grids of the valves 15, 16 through grid bias batteries 27, 28 and resistors 29, 30 and in certain cases the grids and cathodes of the valves may be connected through capacitors 31, 32. A contact rectifier 33 and resistor 34 are serially connected across the secondary winding 25<1> to byepass the grid circuit of the valve 15 during the negative half cycles of grid potential. Similarly the winding 26<1> is shunted by rectifier 235 and resistor 36. In one modification not shown a plurality of valves are excited with grid potential of the same phase relation from the same transformer, and in another the internal reactance provided by the air gap &c. is replaced by an external reactance device. In Fig. 4 a self saturating transformer comprising a primary winding 43, a core member 44, a secondary winding 45 mounted on a self saturated leg 46 and a shunt 47 energizes the grid circuit 49 through an insulation transformer 53. A rectifier 51 byepasses the negative half cycles of the potential and a capacitor 52 suppresses the flow of the unidirectional component resulting therefrom. Current limiting resistors 50, 54 and a capacitor 55 are included in the circuit in the usual manner. Specification 393,722 is referred to.
Patent GB-592943-A (GB)
Title: An electrical device for the solution of differential equations
IPC: G06G3/08
Filed: 1944-08-11
Abstract: 592,943. Electrical calculating apparatus. ENGLISH ELECTRIC CO., Ltd., and TAGG, G. F. Aug. 11, 1944, Nos. 15381/44 and 4065/45. [Class 106 (i)] A device for showing the solution of a differential equation comprises an electrical circuit, at least one source of steady continuous voltage or substantially constant continuous current, one or more of the numerical values of resistance, inductance and capacity in the circuit being adjustable to suit the differential equation to be solved, means for periodically varying the current in said circuit and means for measuring the voltage across some part of the circuit or for measuring the current in such part, which part is so chosen that this varying voltage or current is a measure of the dependent variable to be determined if time is a measure of the independent variable. In Figs. 1, 2 and 3, rotary switches S driven by a synchronous motor M make and break circuit periodically so that the growth of potential across condensers from a zero time can be indicated on a cathode ray tube O graphically with respect to time to give the solution of a differential equation, the constants of which are related to the values of the electrical components. The applied voltages V are constant. Using Fig. 1, an equation of the second order can be solved. Fig. 2 provides a solution of some differential equations of the third order, but the initial conditions cannot be altered without affecting the other constants of the circuit. This drawback is overcome in Fig. 3 by the introduction of a biassing voltage. The indication on the cathode ray tube may be projected on to a larger screen by optical means. In Figs. 4, 5, 6, the source of constant voltage is replaced by a source of constant current. Fig. 4 solves differential equations of the second order, the variation in current in the inductance L being shown by the cathode ray tube O. In Fig. 5, differential equations of the third order are solved. A substantially constant current is fed into the circuit at T1 for a known period of time, current being withdrawn at T2 and T3 in a known ratio at the same time. The current in the inductance L is measured.' The circuit of Fig. 5 is indicated at 10 in Fig. 6, the sources of constant current being indicated at 11, 12. A time-base circuit 15 renders tubes 20, 21 conducting alternately in timed relationship, the tube 21 supplying an oscillograph 13, controlled by the circuit to show a time-graph, with a black-out impulse to prevent a visible return trace. Tubes 20, 21 render tubes 16, 17 conducting alternately with tubes 18, 19. When the tubes 16, 17 are conducting, current is supplied to the circuit 10, but when tubes 18, 19 are conducting, current from the sources is diverted through the byepass circuits. The flow through inductance L is indicated in the form of a graph on the oscillograph after amplification at 14. With this circuit, the oscillograph can be large enough not to require optical magnification.
Patent GB-1466362-A (GB)
Title: Adhesive compositions
IPC: C08G18/79
Filed: 1973-03-30
Abstract: 1466362 Laminates BOSTIK Ltd 29 March 1974 [30 March 1973] 15389/73 Heading B5N [Also in Division C3] Substrates may be bonded using a liquid, substantially solvent- and water-free adhesive composition curable by reaction of its components and comprising a first component which includes a polyester polyol having an OH functionality of 2 to 3 and an equivalent weight of from 100 to 500 and a second component which comprises a prepolymer having 15 to 28% by weight of reactive NCO groups, the prepolymer being the product of reacting a polyester polyol having an OH functionality of 2 to 3 and equivalent weight of from 100 to 500 and excess of an organic polyisocyanate, the composition comprising 80 to 125% by volume of the first component relative to the volume of the second component and the components being such that a volume of the second component will contain a quantity of reactive NCO groups relative to the quantity of reactive OH groups in an equal volume of the first component to produce a cure index of from 100 to 140. The polyester used in making the prepolymer may be the same or different to that used in the first component. Suitably the polyester polyol is a saturated branched polyester formed from mixed aliphatic and aromatic dicarboxylic acids, at least one diol and at least one triol. The first component may also contain a trifunctional alcohol and a catalyst for the hydroxyl/isocyanate reaction. Preferred polyisocyanates used to prepare the prepolymer are the carbodiimide of 4,4<SP>1</SP>-diphenylmethane diisocyanate containing additional 4,4<SP>1</SP>-diphenylmethane diisocyanate, polymethylene polyphenylene isocyanate and a normally liquid 4,4<SP>1</SP>-diphenylmethane diisocyanate. In examples substrates which are bonded to themselves using the adhesive compositions are acrylic polymer sheet, rigid polyvinyl chloride, polyethylene, glass reinforced polymer, A.B.S., glass, steel and aluminium.
Patent GB-1364229-A (GB)
Title: Process for the preparation of m- and p-phenylenediamine from iso phthalic acid diamide
IPC: C07C67/00
Filed: 1973-03-30
Abstract: 1364229 Prep. of m and p-phenylenediamine AKZO NV 30 March 1973 [1 April 1972] 15437/73 Heading C2C m and p-Phenylenediamine is prepared by a process which comprises subjecting isophthalic acid diamide or terephthalic acid diamide to Hofmann degradation. The first stage of the degradation in the formation of N-haloamide is preferably carried out at 0 to 30‹ C. Suitable hypohalites for the process are the hypohalites and hypobromites of sodium, potassium, calcium and barium. Advantageously there are employed aqueous suspensions containing 3 to 10% by weight of the diamide for the preparation of m-phenylene diamine and aqueous suspensions containing 3 to 5% by weight of the diamide for the preparation of p-phenylenediamine. The ratios of equivalents of hypohalite to moles of diamide is advantageously between 2 : 1 and 2À7:1 and for the equivalents of hydroxide to moles of diamide is advantageously between 8 : 1 and 10 : 1.
Patent GB-581257-A (GB)
Title: Improvements in pumps or compressors
IPC: F04B1/14
Filed: 1944-08-14
Abstract: 581,257. Bearings. FORD, R. C. Aug. 14, 1944,No. 15444. [Class 12 (i)] [Also in Group XXVIII] A pump or compressor housing two annular series of units in a stationary casing at opposite sides of a cam 3, rotatable about the axis of the two series and engaging crossheads 7 which connect the plungers of the two series as described in Specification 564,363, [Group XXVIII], is provided with ball bearings 13 between races on the sides of the cam and on or carried by adjacent parts of the crossheads, e.g., tilting plates 14 carried by hemispherical bosses seating in the end of the plungers. Retaining rings 24 for the balls are carried by the cam. The plates 14 are adjustable by a screw motion of plugs 16 in the plungers formed with key recesses 17 accessible on removal of sealing plugs likewise recessed forming the working faces of the plungers.
Patent GB-440868-A (GB)
Title: Improvements in or relating to the copying of opaque originals by contact printing
IPC: G03C5/10
Filed: 1934-08-10
Abstract: 440,868. Photographic printing processes. NAAMLOOZE VENNOOTSCHAP CHEMISCHE FABRIEK L. VAN DER GRINTEN, Venlo, Limburg, Holland. Aug. 10, 1934, No. 15453/35. Convention date, Aug. 11, 1933. Divided out of 440,826. Drawings to Specification. [Class 98 (ii)] Screens for making copies by means of reflected light using illumination of a given direction are produced by subjecting a combination of a dividing screen and a sensitive layer yielding a negative image to the action of light passing first through the dividing screen and then through the sensitive layer, and developing the sensitive layer to produce a covering screen, the covering parts of which correspond to the parts of greater actinic intensity into which the radiation is subdivided by the dividing screen,. the illumination taking place at an angle of incidence other than the angle of incidence of the given direction of illumination employed for the production of the copies. The dividing screen may be a lens or prism screen. The sensitive layer may be a silver bromide layer, or a chromate gelatine layer may be employed and a reducing agent such as ferrous sulphate introduced into exposed parts. On aftertreatment with silver nitrate solution silver is deposited in the exposed parts. Nickel may be deposited in like manner. The angle of incidence of the illumination employed in making the screen may be 11¢‹, and the copies may then be made at an angle of illumination of 0‹. Specifications 425,126 and 440,826 are referred to.
Patent GB-242553-A (GB)
Title: Improved apparatus for carburetting coal gas
IPC: C10J1/00
Filed: 1925-06-16
Abstract: 242,553. McLaren, E. June 16, 1925. Carburetting.-A carburetter for carburetting coal gas comprises in combination a petrol container 1 having a cup-shaped filter-filler 10 and a liquid-level regulating port 14, a float 4 attached to the end of a tube 3 telescoping in the end of the gas inlet pipe 2, and a sump 5 to receive the float 4 when the container is becoming empty.
Patent GB-726869-A (GB)
Title: Improvements in or relating to radio-receivers having optical indication of tuning
IPC: H03F1/54
Filed: 1953-06-05
Abstract: 726,869. Radio receiving circuits. RADIOWERK HORNY AKT.-GES. June 5, 1953 [June 5, 1952], No. 15563/53. Class 40 (5). In a radio receiver having a visual tuning indicator 24, a switch 17 is provided so that the tuning indicator may also be used to monitor the output level. When contacts 19, 20 and 12, 13 are closed the indicator tube 24 is available for tuning. In a second position of the switch, contacts 19, 21 and 12, 13, 14 are closed and the tube is connected to the second. ary of the output transformer 10 via condenser 23 and resistor 22. In a third position, contacts 19, 21 and 12, 14 are closed: the loudspeaker 15 is then,disconnected, being replaced by a dummy load resistor 16. The arrangement is primarily for use in making magnetic tape recording, the output being taken from terminals 11.