baber/WOPTO huggingface dataset:
Patent GB-712709-A (GB)
Title: Improvements in or relating to electric circuit arrangements
Inventor: MCCALLISTER EDWARD SAMUEL
IPC: A61B5/04
Filed: 1952-01-25
Abstract: 712,709. Impedance networks. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 17, 1952 [Jan. 25, 1952], No. 2130/52. Class 40 (8) A circuit arrangement for reducing unwanted signals due to stray fields of frequencies of the order of those of normal alternating current supplies, and having a pair of input terminals supplied differentially with respect to earth with a desired signal, contains circuit components so adjusted that the undesired signals at each output terminal are equal in phase. As shown, signals from a source 1 are applied to input terminals 9 and 10 in a differential manner whereas interfering signals reach each of these terminals in the same sense. An indicator is operated by a differential amplifier 8 connected to output terminals 5 and 6. If the undesired signals at each terminal are equal in amplitude and phase they will cancel out in amplifier 8. A potentiometer R1 has an adjustable centre tapping connected to earth to equalize the amplitudes of the undesired signals at the output terminals. The present invention provides a further potentiometer R2 in series with condensers C1 and C2 to equalise the phase of the undesired signals at the output. The adjustment is made by trial and error.
Patent GB-641461-A (GB)
Title: Improvements in or relating to supersonic wave method and apparatus
IPC: G01N29/24
Filed: 1944-02-04
Abstract: 641,461. Testing materials by supersonic vibrations. UNITED AIRCRAFT CORPORATION. Feb. 4, 1944, No. 2134. Convention date, Jan. 2, 1943. [Class 118 (ii)] [Also in Group XXXIX] In the interior or surface inspection of an elastic body by means of ultrasonic mechanical waves, the surface of the wave generator in contact with the body executes a combined lateral and angular movement. Fig. 3 shows an end view of a Y-cut quartz crystal which will thus vibrate when placed in an oscillating electric field, and may be used to produce surface or shear waves in material under test. As. applied to tests for rigidity, surface flaws, &c. two such quartz crystals 10, 18, Fig. 7, are interposed between electrodes 16, 20 and the surface of the material 12 under test, which in this case serves as the second electrode for both the emitter and receiver ; the potential produced across the electrodes of the receiver by vibration in response to surface waves generated by the emitter is amplified and applied to an indicator, such as an oscilloscope to which the emitter is also connected. The amount of adjustment necessary to the micrometer 30 between two points at which the phase of the emitted and received waves coincides (as shown by the oscilloscope) gives an indication of the wavelength from which, the frequency being known, the velocity may be calculated and an indication thus obtained of the rigidity of the material about various axes ; the velocity may also be determined by timing the passage of a wave train from the emitter to the receiver, or the reflected time to and from a reflector at a known distance if the emitter is also used as the receiver. Timing in this way at a known velocity may also be used to locate a surface flaw. Observation of the degree of attenuation at varying wavelengths may provide a means for determining the size and extent of inclusions (such as free graphite in cast iron), or as a measure of the roughness of, e.g. a machined metal surface. Separate electrodes may be interposed between the quartz crystals 10, 18 and the material 12, or a YZ face of the crystal or one long edge of a YZ face (the crystal in this case being at an angle) may contact the material, electrodes being placed on the two XZ faces. An oil film may be applied to inhibit the radiation of waves into the body of the material. Specifications 569,858, [Group XL], and 641,095 are referred to.
Patent GB-870169-A (GB)
Title: Patterns or models and their method of manufacture
Inventor: JONES STANLEY OLIVER
IPC: B22C7/00
Filed: 1959-01-20
Abstract: 870,169. Making patterns; templates. PRESSED STEEL CO. Ltd. Feb. 24, 1960 [Jan. 20, 1959], No. 2153/59. Classes 83 (1) and 83 (3). A foundry pattern or a model for use in the production of sheet metal working tools comprises a wooden framework incorporating shaped headers 13 and a series of thin battens 15 secured to the shaped surfaces of the headers, there being a layer of plastic concrete material 20 poured into contact with the headers and battens. The concrete material is a synthetic plastic containing a cork filler. The outer surface formed by the battens is finally hand-finished.
Patent GB-126409-A (GB)
Title: Improvements in or relating to Electrical Heating Systems.
IPC: F24C7/00
Filed: 1918-02-07
Abstract: 126,409. Vickers, Ltd., Pearson, R. J. A., and Matthews, C. R. Feb. 7, 1918. Cauldrons.-Relates to apparatus for melting resin, and consists in providing two vessels a<1>, b<1>, the space between which contains vaseline, which is heated by an electric heating element b. The inner vessel a<1> is divided by a perforated partition j and is provided with a hopper f<1> containing electric heating elements g<1> to melt the resin. The melted resin is filtered through a perforated tray i. The discharge nozzle p is surrounded by the heated vaseline and is provided with a valve t having a recess u and a plate v to prevent spluttering. Inlet and overflow pipes and a discharge valve are fitted to the space between the vessels.
Patent GB-942655-A (GB)
Title: Improvements in or relating to bearings
Inventor: LOVEGROVE HENRY JOSEPH
IPC: F16C39/06
Filed: 1959-01-21
Abstract: 942,655. Magnetic bearings. SANGAMO WESTON Ltd. Dec. 31, 1959 [Jan. 21, 1959], No. 2278/59. Heading F2A. A magnetic suspension bearing for a vertical spindle 10 comprises a magnet 12 secured to the spindle and a magnet 24 secured in a cupshaped end 25 of a sleeve 26 which is located below the magnet 12; bearing means are provided at the ends of the spindle to allow axial but inhibit lateral movement of the spindle. The spindle, magnet 12 and a disc 11 of an electric watt hour meter, Fig. 1, are integrally connected. The lower end of the spindle is bored at 19 and is reduced in diameter to receive a member 20 thereon which carries a ring-type bearing jewel 23. A pintle 28, held in the sleeve 26, for example by casting type metal therein, extends through the jewel 23 into the recess 19. A pintle and a jewel bearing is also provided at the upper end of the spindle. In another embodiment, vertical displacement is controlled by a steel ball 37, Fig. 2, being forced into the bore 19 and by the cup 38, which holds the magnet 24, being screwedly attached to the sleeve; the cup 38 being rotated to bring the pintle into contact with the ball. The effects of temperature changes upon the operative suspension flux between the magnets 12, 24 is compensated by providing a body 46 of temperature-sensitive magnetic alloy in the flux path between the magnets, this body 46 is conveniently held by the cup 38. In another embodiment the cup 25, Fig. 4, is integral with a support 47 which is clamped by a spring-clip 59 which forces a block 54 towards a V-section groove 55 of the frame 53. Vertical displacement is effected by rotating the support 47 which is screw-threaded at 58 for engagement with internal half-threads 57 on the block 54. The steel ball is replaced by a disc-shaped pad 52 of nylon. A further embodiment combines the mounting arrangement for the magnets 12, 24 as shown in Fig. 4 with the vertical displacement arrangement as shown in Fig. 2 also the pintle 28 is fixed into a stem 62, Fig. 5. Instead of the members 13, 26, 42 and 62 being of diecast metal they may be made from synthetic plastics material.
Patent GB-488014-A (GB)
Title: Method and device for vulcanising flat thin workpieces, particularly pneumatic tyre plasters, in bipartite press-moulds
IPC: B29C35/00
Filed: 1938-01-24
Abstract: 488,014. Vulcanizers. KELLER, O. Jan. 24, 1938, No. 2323. [Class 70] In the vulcanizing of thin flat work pieces such as pneumatic tyre plasters in bipartite press moulds, one moulding part is directly heated by a source of heat and the other is heated indirectly by the first moulding part. The apparatus shown comprises a directly heated flat plate a and a thin shaped plate c of aluminium or similar material which is a good conductor of heat, the plate c having an edge which projects beyond the work piece b and is adapted to rest on the heated plate a so as to be indirectly heated thereby. The plate c is screened by a plate e of cardboard, asbestos, or similar material which is a bad conductor of heat; the plate e is preferably extended on one side to form a handle l. A disc i of steel is secured to the plate e to distribute the pressure exerted by the pressing spindle k when the mould is placed in the press.
Patent GB-1457093-A (GB)
Title: Purification of vinyl chloride
IPC: C07C21/06
Filed: 1975-01-20
Abstract: 1457093 Vinyl chloride recovery LUMMUS CO 20 Jan 1975 [21 Jan 1974] 2411/75 Heading C2C Monomer grade vinyl chloride (at least 99À95 mol. per cent) is recovered by (a) introducing a mixture comprising vinyl chloride and, as impurities, methyl chloride and at least one C 4  aliphatic hydrocarbon into a first fractional distillation zone to recover vinyl chloride and lighter components as overhead; (b) introducing the overhead into a second frational distillation zone to recover vinyl chloride of monomer grade as bottoms. The mixture introduced into (a) preferably contains 95-99 mol per cent vinyl chloride and the first distillation zone is run at an overhead temperature of 35-293‹ F., a bottoms temperature of 65‹ to 300‹ F. and a column pressure of 1À7-44 atmospheres. The second distillation zone is preferably run at an overhead temperature of 12-248‹ F., a bottoms temperature of 52-300‹ F. and a column pressure of 1À7-45À5 atmospheres. The overhead from (a) preferably has less than 500 ppm of components heavier than vinyl chloride and the bottoms from (b) less than 65 ppm of C 4  hydrocarbons and less than 11 ppm of methyl chloride.
Patent GB-678624-A (GB)
Title: Improvements in or relating to devices for aerating lawns and the like
Inventor: CHARD CYRIL GEORGE
IPC: A01B1/24
Filed: 1950-01-31
Abstract: 678,624. Turf-aerating appliances. FORD, Ltd., L. G. April 30, 1951 [Jan. 31, 1950], No. 2538/50. Class 6(ii) A turf-aerating tool consists of a rectangular plate, in part plane and partly curved, connected by inverted-V side frames to a handle 10, and provided with spikes 38. The front row of spikes is curved, the others bent forwardly. A bar 20 is pressed by the user's foot.
Patent GB-285478-A (GB)
Title: Improvements in or relating to the coupling of two alternating current mains of different frequencies
IPC: H02J3/34
Filed: 1928-01-26
Abstract: 285,478. Siemens -- Schuckertwerke Akt.-Ges., (Assignees of Siemens-Schuckertwerke Ges.). Feb. 18, 1927, [Convention date]. Rotary transformers; alternating-current induction machines. - A motor-generator for coupling two alternating current mains of different frequencies comprises on one side a synchronous machine cascaded with a commutator machine, and in order to regulate the total power transmission in accordance with some prescribed law, the commutator machine has separate rotor and stator excitations which can be regulated independently. As shown in Fig. 1, the motorgenerator comprises a synchronous machine 2 connected to three-phase mains 1 and coupled to a synchronous machine 3 connected to singlephase mains 4. The rotor of the synchronous machine is cascaded with a commutator machine 5 which has a counter-compound winding 8 and a winding 13 connected through a resistance 14 between the slip rings 6 of the machine 2 and a frequency transformer 9. If constant power transmission independent of the frequency ratio is desired, the cascade machine 5 is stator excited only, but if a buffer action is required in the event of a change in the frequency ratio of the two mains, the necessary regulation is effected by the series transformer 16 in the rotor circuit of the commutator machine 5 and the extent of this buffer action can be regulated by an adjustment of the transformer 17. If it is desired to maintain a certain power ratio between the generators feeding the mains 1, 4, the arrangement shown in Fig. 3 may be adopted. In this case, the rotor of the cascade machine 5 is fed through a group constituted by a synchronous machine 22 driving an alternating current generator 18 and a separately excited rotary converter 21. The machine 18 has a field winding connected to a continuous-current source of constant voltage, and a winding connected in series with the rotary converter 21, the two windings being displaced by 90‹. By dispensing with the rotor excitation of the machine 5, the motor generator may give constant power transmission or it may act as a buffer machine. To avoid loss of power in the resistance 14, Fig. 1, when large powers are transmitted, the arrangement shown in Fig. 4 may be employed. In this modification an exciter 23, preferably having strong armature reaction is interposed between the cascade machine 5 and the frequency transformer 9. The exciter 23 is driven by a synchronous motor 28 which also drives a machine 29 similar to the machine 18, Fig. 3.
Patent GB-128148-A (GB)
Title: Improvements in or relating to Electric Bells.
Inventor: SHENTON FRANCIS JAMES
IPC: G10K1/26
Filed: 1919-02-03
Abstract: 128,148. Shenton, F. J. Feb. 3, 1919. Drawings to Specification. Bell cases or covers; bell-operating mechanism, electric.-In electric bells, the immovable supporting fittings, anchorages, or supports of the metallic parts are embedded in the baseboard or support or formed by excrescences of the material of such support. The baseboard or support is composed of insulating material or composition, and may be moulded or cast to comprise the excrescences or cavities. The material used may be asbestos and cement, shellac, or other binding material or composition, or compressed paper pulp. The fittings to be embedded may be serrated or bent to afford a keying action. The material may be reinforced by wire gauze or netting, wires or strips, or other metallic material,
Patent GB-104205-A (GB)
Title: Improvements in and relating to Vehicle Wheels.
Inventor: MOORE WILLIAM JAMES PERRY
IPC: B60B3/08
Filed: 1916-02-23
Abstract: 104,205. Moore, W. J. P. Feb. 23, 1916. Wheels.-Vehicle wheels are formed by welding the edges of a pair of disks 6, 7 to the hub 8 and rim 5 which are preferably recessed to form flush joints. The complete disks may be heated during the welding process so as to set up tension in the finished wheel. Specification 104,314, [Class 144 (i), Wheels &c.], is referred to.
Patent GB-551686-A (GB)
Title: Improvements relating to code transmitting devices for electric signalling systems
IPC: B61L23/16
Filed: 1941-03-03
Abstract: 551,686. Electric interrupters. WESTING- HOUSE BRAKE & SIGNAL CO., Ltd., and MACGREGOR, R. M. March 3, 1941, No. 2832. [Class 40 (i)] [Also in Group XXXVII] An electric interrupter comprises a shaft 1 which is oscillated with the aid of a magnet 6 acting on an armature 7, on the shaft, a spiral spring 16 and an inertia member 8 and carries a cam which controls interrupter contacts 19 in the circuit of the driving magnet and two other cams each of which controls two contactpairs. The make and break period of the pairs controlled by the latter cam 3 are indicated in Figs. 6 and 7 respectively, the shaded parts indicating make periods. The interrupter pairs are selectively connected to a common signalling circuit singly or in pairs by means not described to give trains of impulses. having different make to break ratios for code signalling.
Patent GB-807797-A (GB)
Title: Improvements in or relating to p-n junction transistors
Inventor: ARCHER JOHN ANTHONY
IPC: C30B31/04
Filed: 1956-01-30
Abstract: In the Provisional Specification an alloy consisting of 99 per cent indium and 1 per cent antimony, suitable for use in forming an alloy type PN junction in a semiconductor body (see Group XXXVI), is described.
Patent GB-1006986-A (GB)
Title: Ceramic materials and methods of preparation
Inventor: LONG ROGER A
IPC: C04B33/13
Filed: 1964-01-24
Abstract: A refractory consists of a finely divided refractory oxide filler and a binder which is a eutectic of a refractory oxide and a metal pyrophosphate.  The refractory oxide filler may be the same as that of the eutectic and may be alumina, zirconia, beryllia, titania, magnesia, chromia, thoria or hafnia and the pyrophosphate may be that of manganese, titanium, iron, zirconium or nickel.  The eutectic may be blended with the filler and the mixture heated under pressure to a temperature of about the melting point of the eutectic. 10-20 weight per cent of NaPO3 may be added to the pyrophosphate to lower the melting point of the eutectic.
Patent GB-432216-A (GB)
Title: Improvements in breaking and scutching machines for preparing bast fibres and like fibrous material for spinning
IPC: D01B1/22
Filed: 1934-02-28
Abstract: 432,216. Breaking and scutching bast fibres. STEWART, H. J., Trafford Park, Hillside, Bulawayo, Rhodesia, GARDINER, W., 15, Biggar Place, Camlachie, and RUSSELL, M., 11, Bothwell Street, both in Glasgow. Feb. 28, 1934, No. 3212. [Class 120 (i)] A breaking and scutching machine for preparing flax, hemp and like bast fibres for spinning, comprises in combination one or more pairs of plain or smooth crushing rollers 10, 12, 20, Fig. 2, a number of sets of longitudinally fluted breaking rollers 14, each roller being positively driven and one roller of each pair being resiliently mounted, pairs of rotary flexible brushes 11, 21 interposed at intervals between the rollers and air blast pipes 13 similarly interposed between the rollers and directing air jets on to the stalks in the direction of their travel. The brushes 11, 21 are driven faster than the smooth and fluted rollers. The upper member of each roller or brush pair 10, 11, 14, is mounted in resilient bearings 15, Fig. 3, and is positively driven from the lower through bevel gearing 16, 18 on a vertical shaft 17, the bevel pinion 18 being slidable on the shaft 17. The bearings 15 are mounted between upper springs 19 and a plate or other spring 36. Alternatively a packing piece may be substituted for the spring 36. The drive is transmitted from the main driving pulley 25 through pinions 31 gearing with pinions 30 on the lower rollers. The material, which is preferably dried at a low temperature before treatment, is fed into the machine by a conveyer 8 and is delivered by rollers 22, 23 on to a table 24. The rollers 14 are provided with flutes of different pitch and/or depth, while a smooth roller may be substituted for the lower brush of some of the pairs 11, 21.
Patent GB-893075-A (GB)
Title: Improvements in or relating to the manufacture of polymeric materials
Inventor: LOWE ARTHUR
IPC: C08G18/42
Filed: 1959-01-30
Abstract: A process for the manufacture of foamed cellular polyurethane materials by interaction of organic polyisocyanates and polyesters is characterized in that the organic polyisocyanate is first interacted at a temperature between 70 DEG C. and 140 DEG C. with from 10% to 70% by weight of the polyester, and the product so obtained is then mixed with the remaining quantity of polyester and water, preferably in the presence of a basic catalyst, to give a mixture which reacts to form a foam.  Diisocyanates (with which up to 20 mol. per cent of triisocyanates may be mixed) are listed.  Also specified are dicarboxylic acids, glycols, polyhydric alcohols and amino alcohols from which the polyesters are prepared.  In the initial interaction usually between 4 and 20, preferably between 8 and 14 moles of polyisocyanate for each mole of polyester is used.  In an Example (1) a prepolymer is prepared from a diethylene glycol/pentaerythritol adipate copolyester and tolylene -2:4 and 2:6- diisocyanates by heating at 110 DEG C.  It is stirred with a mixture of further polyester (in amount equal to that used in preparing the prepolymer), dimethylcyclohexylamine, an alkylphenol/ethylene oxide condensate and water, reaction to form a foam taking place.ALSO:A process for the manufacture of foamed cellular polyurethane materials by interaction of organic polyisocyanates and polyesters is characterized in that the organic polyisocyanate is first interacted at a temperature between 70 DEG  and 140 DEG C. with from 10% to 70% by weight of the polyester, and the product so obtained is then mixed with the remaining quantity of polyester and water, preferably in the presence of a basic catalyst, to give a mixture which reacts to form a foam. Diisocyanates (with which up to 20 mol percent of triisocyanates may be mixed) are listed.  Also specified are dicarboxylic acids, glycols, polyhydric alcohols and aminoalcohols from which the polyesters are prepared.  In the initial interaction usually between 4 and 20, preferably between 8 and 14 moles of polyisocyanate for each mole of polyester is used. Tertiary amines and sodium carbonates are listed catalysts.  In an example (1) a prepolymer is prepared from a diethylene glycol/pentoerythritol adipate copolyester and tolylene -2 : 4- and 2 : 6- diisocyanates by heating at 110 DEG C. It is stirred with a mixture of further polyester (in amount equal to that used in preparing the prepolymer), dimethyl cyclohexylamine, an alkylphenol/ethylene oxide condensate and water, reaction to form a foamed product taking place.  The foam-forming mixture may be applied to a substrate or foaming may also be effected between two substrates to give a laminate.  In a further process the composition is applied to a rotating cardboard tube, to give a cylinder of resilient foam having an impervious skin.
Patent GB-1049251-A (GB)
Title: Slotted plate for comminuting machines
IPC: B02C18/36
Filed: 1965-01-26
Abstract: 1,049,251. Mincers. K. SCHNELL, [trading as KARL SCHNELL, MASCHINENFABRIK]. Jan. 26, 1965 [Feb. 19, 1964], No. 3347/65. Heading A4C. A plate for use in machines for comminuting foodstuffs has slots 1 extending inwardly from the peripheral edge 3, a groove being provided in the edge 3 to locate a reinforcing wire 5 which is preferably welded in the groove adjacent each slot.
Patent GB-430895-A (GB)
Title: Improvements in machines for brushing and lustering fabrics, especially pile fabrics
IPC: D06C11/00
Filed: 1935-02-01
Abstract: 430,895. F i n i s h i n g fabrics. MATHONET, A., 92, Vaelserstrasse, Aachen, Germany. Feb. 1, 1935, No. 3389. [Class 42 (i)] Pile &c. fabrics are brushed and lustered by a brush b or polished metal member l which extends across the whole width of the fabric W and can be moved to and fro over the fabric in the direction of warp and in the direction of the weft, these two movements taking place simultaneously or otherwise, e.g. by a crank and rod f, g. The polishing member b is heated and may be hollow.