baber/WOPTO huggingface dataset:
Patent GB-579744-A (GB)
Title: An improved pulse or harmonic generator
IPC: H03K5/01
Filed: 1942-12-05
Abstract: 579,744. Valve generating circuits. JELONEK, Z. Dec. 5, 1942, No. 17321. [Class 40 (v)] A pulse or harmonic generator comprises a pentode or other multi-electrode valve fed from an oscillating source and arranged so that the suppresser grid follows the variations in the screen grid voltage and so that the characteristic curve of the screen grid current against suppresser grid voltage has a negative slope. Figure 3 shows an arrangement in which a source 1 feeds a pentode provided with a coupling condenser 6 between the screen and suppresser grids so arranged that the suppresser grid follows the potential variations of the screen. In this way instead of generating symmetrical pulses as would be the case in the absence of the coupling condenser, pulses are produced which are assymmetrical and narrower, but contain an increased amount of energy at the higher harmonics. The Specification gives curves, Figs. 5 and 6 (not shown), of the amplitudes of the harmonics produced in the two cases. The pulse width may be varied by adjustment of the voltage applied to the anode.
Patent GB-762705-A (GB)
Title: A process for the synthesis of hydrocarbons and oxygen-containing organic compounds
IPC: C07C29/159
Filed: 1952-07-21
Abstract: In the synthesis of hydrocarbons and oxygenated compounds by contacting a mixture of carbon monoxide and water vapour with a Group 8 metal catalyst at 150-350 DEG  C. and 0-100 atmos. gauge, the catalyst being previously activated with carbon monoxide and hydrogen at 150-350 DEG  C.; as in the parent Specification, the molar ratio of carbon monoxide to water vapour is maintained between 2 and 3.  To give predominantly hydrocarbons, the ratio is 3; for alcohols it is less than 3 while pressure exceeds 20 atmos. The water may be introduced as liquid in one or more positions to dissipate reaction heat.  Hydrogen may be introduced to react also with the carbon monoxide.  The catalysts and other synthesis conditions are as in the parent Specification.  The preparation of a catalyst by precipitating ferric and cupric nitrates with sodium carbonate, and activating by passing first CO and then H2 at 270 DEG  C. is described.  In examples: (1) a precipitated iron-copper-kieselguhr catalyst containing also magnesium and potassium is activated with a 1 : 2 CO-H2 mixture at a space velocity of 100 and at 270 DEG  C. and then contacted with CO-H2 mixtures at 230 DEG  C., 10 atmos. and a space velocity of 100; (2) an iron-copper-alkali catalyst is suspended in a synthetic oil and activated by passage of CO and then H2 at 270 DEG C. and 4 atmos., CO then being passed at 240 DEG  C. and 11 atmos., liquid water being injected at the bottom and mid-point of the reactor in a molar ratio H2O : CO of 1 : 3.
Patent GB-974609-A (GB)
Title: Improvements in or relating to clutch plates, more particularly for motor vehicles
IPC: F16D13/64
Filed: 1963-05-02
Abstract: 974,609. Friction clutches. FICHTEL & SACHS A.G. May 2, 1963 [May 4, 1962], No. 17428/63. Heading F2C. In a clutch plate in which the friction linings 5 are secured to segments 3a riveted to the clutch plate 1, an air gap 7a is provided between the segments 3a and the plate 1 by annular spacing elements 7 of metal or a heat-resisting insulating substance. The segments and/or the plate may, additionally, be radially slotted, 13, between every two rivets. Two or four rivets per segment may be used and the friction lining may be sintered to the segments.
Patent GB-839851-A (GB)
Title: Method and apparatus for producing dispersions of solid or liquí¡í¡ ls in air or other gas
IPC: B01F3/04
Filed: 1956-06-06
Abstract: 839,851. Producing dispersions of liquids in gases. HARMON, C., GRISWOLD, H. W., and SMITH, J. H. June 6, 1956 [June 6, 1955], No. 17535/56. Class 55 (2). In a process for forming a dispersion of particles of a material which can be vaporized without appreciable decomposition in air or other gas, the material is mixed to form a solution or an emulsion with a liquid more volatile than the material and fed from a tank 1 via a pump 2 through a heating coil 5 in which the solvent or dispersant liquid and a substantial proportion of the material to be dispersed is volatilized, the vapours being passed through a heat-insulated pipe V, an outlet 12 into a stream of air or other gas, at a temperature below the vaporization temperature of the material being dispersed and above the dew point of the air or other gas with respect to the solvent or dispersant liquid. The size of the particles dispersed lies between 0.3 and 10 microns and is preferably controlled between 0.5 and 3.0 microns. The coil is heated by a liquid bath of a molten metal, e.g. lead, or a molten salt, heated by a thermostatically controlled heater 9. The temperature of the bath is maintained at 200-800 F. above the boiling point of the solvent or dispersant liquid. Water is the preferred solvent or dispersant liquid but other liquids such as ethyl alcohol, naphtha, acetone or carbon tetrachloride may be used. The material to be dispersed may be a liquid or a solid material which can be vaporized without appreciable decomposition and may be a dye or other substance employed in the treatment of or to be applied to fibres or other material. The amount of material to be dispersed contained in the solution or emulsion may be between 10 to 90% by weight.
Patent GB-730591-A (GB)
Title: A new or improved electrically operated indicator
Inventor: SPREADBOROUGH JOHN
IPC: G08B5/24
Filed: 1952-07-11
Abstract: 730,591. Electric selective signalling indicators. PLESSEY CO., Ltd. Sept. 21, 1953 [July 11, 1952], No. 17542/52. Class 40 (1). A three-position indicator comprises a permanent magnet 1 centrally located in a transparent plastic sphere 2 which is mounted on a shaft 3, having the poles of a permanent magnet 4 in close proximity to the sphere 2 and across a diameter, with a two-winding electromagnet 5 mounted centrally at right angles to the shaft 3. The windings of magnet 5 are in opposite directions, so that energization of one winding causes the magnet 1 and sphere 2 to rotate through 90 degrees in one direction, and energization of the other winding produces a 90 degree rotation in the other direction. The surface of the sphere 2 is suitably marked so that its position is visible through a window 7 in the casing 6.
Patent GB-1068313-A (GB)
Title: High molecular weight copolymers and process for preparing them
IPC: C08G2/38
Filed: 1964-04-28
Abstract: A solution or dispersion obtained by heating, in trioxane, a polyformal of formula -([-O-A-(OCH2)m-])n-where A is a straight-chained or branched saturated or olefinically unsaturated aliphatic hydrocarbon radical containing at least two carbon atoms and which may contain a halogen-substituted aliphatic side chain, or a cycloaliphatic radical or an aralkyl radical, m is a whole number from 1 to 20 and n is a whole number, is polymerized by cooling once or several times to a temperature at least that of the phase transition from the liquid to the solid phase. The polyformal may have been obtained by homopolymerization of a cyclic formal or copolymerization of a cyclic formal or cyclic ether with trioxane, in the presence of a cationic catalyst, and the copolymerization reaction may be used to produce the solution or dispersion of polyformal in trioxan which is then subjected to the further polymerization.  Alternatively the polyformal may be obtained by polycondensation of a dihydric alcohol or a dihydric ol-thiol compound with formaldehyde. Specified catalysts are boron fluoride, its complexes, substituted diazonium salts, other Lewis acids e.g. tin tetrachloride and trimethyl oxonium tetrachloroferriate.
Patent GB-824221-A (GB)
Title: Improvements in or relating to electric pulse modulating and demodulating circuits
Inventor: CATTERMOLE KENNETH WILLIAM
IPC: H04B14/02
Filed: 1956-06-08
Abstract: 824,221. Automatic exchange systems. STANDARD TELEPHONES & CABLES Ltd. June 7, 1957 [June 8, 1956], No. 17802/56. Drawings to Specification. Class 40 (4). [Also in Group XL (c)] The requirements for minimum transmission loss in the low-pass filter section of the reactance-store " modems " disclosed in Specification 753,645, [Group XL (c)], are analysed and ideal formulae given. It is shown that the filter should have a response to a current impulse consisting of an oscillating voltage having a value of substantially zero at time intervals equal to integral multiples of the switching time period, assuming that the signal wave has a frequency between zero and half the switch operation frequency. The application of the formulae to two-way and to one-way systems, with or without repeaters, and to the system disclosed in Specification 822,297 is analysed and shown to be satisfactory. It is suggested that a sufficiently close approximation to the ideal may be achieved by a 3 or more element maximally flat filter, though a filter of the equal ripple could be used. Practical values for a 4- element maximally flat filter are given. Specification 824,222 also is referred to.
Patent GB-180230-A (GB)
Title: Improvements in and relating to speed regulating means for dynamo electric machines
IPC: H02P7/26
Filed: 1921-06-30
Abstract: 180,230. British Thomson - Houston Co., Ltd., (General Electric Co.). June 30, 1921. Contact-speed control systems.-Direct-current motors are automatically regulated for constant speed by connecting the field winding 7 to the anode of a thermionic valve 9, the cathode of which is heated to a degree depending on the speed of the motor by means of an auxiliary generator 2 coupled to the motor armature 4. Several valves may be arranged in parallel. The type of valve employed is preferably the single cathode type. In a modification adapted for lower-voltage machines, alternating current, taken from two additional collector rings on the motor, feeds the anode of the valve tube through a step-up transformer. The secondary circuit of the transformer, which carries current pulsations rectified by the valve, is connected to one field winding of the motor, and an additional field is provided for starting. A relay 12 short-circuits the valve tubes in case of the cathodes burning out, and thus prevents the motor from running away.
Patent GB-722257-A (GB)
Title: Automatic control arrangements for circular looms
IPC: D03D37/00
Filed: 1951-07-27
Abstract: 722,257. Circular looms ; stop motions ;  controlling automatic bobbin changing. QUALITEX-SOC. DUNOD & CIE. July 27, 1951 [July 27, 1950], No. 17822/51. Addition to 677,832. Class 142 (2). The invention comprises electronic amplifiers responding to the continuous and intermittent light signals received from the shuttle of a circular loom as described in the parent Specification, and an electrical circuit including relays and rotating timing switches for controlling the automatic bobbin-changing mechanism described in Specification 717,837 and interrupting fabric take-up. If a weft thread breaks or the shuttle ceases to travel round the loom, the loom is stopped; if automatic bobbin-changing mechanism is not fitted, the loom is also stopped when the weft is exhausted; an alarm signal operates when the loom stops. Amplifier, The amplifier incorporates two triodes, the continuous signal generated by the photo-electric cell on the shuttle driving arm, due to reflection of light by the mirror on the shuttle, being fed to the first triode ; the consequent change in its anode potential biasses the second triode to an operative condition, so that it amplifies the intermittent signal picked up by the photo-cell from the flashing lamp on the shuttle. When the weft breaks, the mirror moves as described in the parent Specification and no longer illuminates the cell; the resulting change in current through the first triode operates a relay to stop the loom. Depletion of the weft extinguishes the flashing lamp on the shuttle, whereupon absence of signal at the second triode causes a relay to bring automatic bobbin-changing mechanism into action ; the loom continues to run since the first triode still receives a signal from the mirror on the shuttle. If the shuttle fails to accompany its driving arm, continued movement of the arm takes the photo-cell out of range of the signals, whereupon the loom stops. In a modification, the flashing lamp is dispensed with and the second triode is connected to studs on the shuttle race traversed by a brush on the shuttle to generate the intermittent signal. Alternative arrangement, Fig. 4. A highfrequency generator H on the shuttle-driving arm 14 feeds current to the shuttle through coils S6, S5. A coil S1 on a spring-loaded lever is kept in register with a coil S2 by the tension of the weft running over a pulley on the lever ; if the weft breaks, current is no longer returned through the coils S1, S2 to the first valve of the amplifier A. When the weft is nearly exhausted, brushes 9, 10 make contact with a conductive part of the bobbin to supply a signal through coils S3, S4 to the second valve of the amplifier A. Specification 677,716 also is referred to.
Patent GB-1294277-A (GB)
Title: Electrodeposition of metals and cathodes therefor
Inventor: MADDEN GERALD IVAN
IPC: C25C7/02
Filed: 1971-05-28
Abstract: 1294277 Cathodes for electro-winning of metals INTERNATIONAL NICKEL Ltd 28 May 1971 [12 June 1970] 17862/71 Heading C7B A re-usable cathode for use in electro-winning of metals, e.g. nickel, copper, zinc, cobalt or manganese, has conductive islands on its surface defined by an inter-connecting pattern of vitreous enamel fused to the metal base, the enamel being resistent to conditions prevailing in electrowinning baths, and the areas of the metal cathode coated with the enamel having been roughened, e.g. by sand blasting, prior to coating. If the metal to be deposited is of high stress, e.g. nickel deposited from a sulphate/chloride bath, the rough surface finish of the cathode preferably extends over the conductive islands; if the metal deposited is of low stress, the conductive islands are preferably comparatively smooth to prevent too strong adherence between the deposited metal and the cathode. The conductive islands may be oval or circular, and the deposited metal discs may be removed by flexing, by vibration or by hammering.
Patent GB-194994-A (GB)
Title: Improvements in and relating to wind screens for motor vehicles
IPC: B60J1/14
Filed: 1922-06-29
Abstract: 194,994. Fornaca, G. June 29, 1922. Windscreens. - A C-shaped frame for the pivoted side-wings of a motor-vehicle windscreen is built up of an intermediate hinge portion 6 and upper and lower portions 12, 11, one of the latter portions, preferably the upper, being readily detachable so that the glass 13 can be mounted or dismounted by sliding it into engagement with channels 17 in the portions 6, 11. The outer ends 11<a>, 12<a> of the portions 11, 12 of the frame are turned inwardly to retain the glass 13, while the inner ends are shaped to embrace tongues 14 at the ends of the hinge portion 6. The portion 6 is rotatably supported on the standard 1 by means of two socket members 3, 3<1>, of which the lower one 3 is provided with a serrated surface 4 engaged by a corresponding spring-pressed serrated member 5 carried by the hinge portion 6. The pressure exerted by the spring 7 is varied by an adjusting-screw 9 passing through the upper pivot member 8.
Patent GB-429710-A (GB)
Title: Improvements in baffles for steam boiler flues
IPC: F23M9/00
Filed: 1934-06-18
Abstract: 429,710. Baffles. OWEN, W. H., 19, Home Park Road, Wimbledon, London. June 18, 1934, No. 17933. [Class 51 (i)] A baffle for a boiler flue comprises a hub a with peripheral slots b of dovetail or equivalent form around its periphery to receive readily removable radial blades d adapted to produce a whirling motion of the gases. The hub is annular and the lower blades are provided with feet e.
Patent GB-750569-A (GB)
Title: Pressure controller for machines for pasting the grids of electric accumulators
IPC: H01M4/20
Filed: 1954-06-18
Abstract: 750,569. Accumulator pasting machines. WINKEL, H. C. June 18, 1954 [Nov. 5, 1953], No. 17941/54. Class 53. A machine for pasting accumulator grids has pasting rollers 16, 17 in a hopper 12 below which is a conveyer band 15 carrying grids delivered from a receptacle 11. To regulate the pressure with which the paste is forced into the grid an adjustable gate 25 consisting of a solid halfcylinder is mounted on a horizontal axis in a recess in the wall 21 of the hopper. In the position shown in Fig. 3 an open space 36 is left between the roller 17 and hopper wall 21 through which paste forced downwardly between the rollers can move upwards. When the gate is turned to partly close the space 36 the movement of the paste upwardly between the roller 17 and wall 21 is restricted and paste is trapped in the lower corner of the hopper, thus building up pressure between the roller 17 and the grid being pasted. When the gate is rotated through a right-angle it touches the roller and closes the passage 36, thus producing a maximum pressure of paste on the grid. The gate is mounted at its ends in opposite walls of the hopper and is provided with an operating handle which can be fixed in any position by a quadrant and clamp.
Patent GB-1318327-A (GB)
Title: Sacrificial anode
IPC: C23F13/02
Filed: 1971-05-28
Abstract: 1318327 Cathodic protection NIPPON YAKIN KOGYO K K 28 May 1971 [30 May 1970] 18067/71 Heading C7E [Also in Division B3] An anode for cathodic protection of stainless steel is prepared by casting molten Al or Albased alloy around a stainless steel core wire and drawing the resulting cast. The thickness ratio coating : core may be 0À5 to 10:1 and an alternative method of making the anode is to press the coating around the core. The anode is used to protect a body of the same material as the anode core, e.g. a boiler of 18-8 stainless steel may have attached thereto by spot welding a core wire of 18-8 stainless steel coated with Al or an alloy containing 5À2% Mg, 0À1% Mn, 0À1% Cr, balance Al, to protect the boiler against corrosion, particularly in solutions containing Cl.
Patent GB-1013937-A (GB)
Title: Improvements in the manufacture of artificial teeth
IPC: C08F265/06
Filed: 1963-05-08
Abstract: A monomer/polymer dough containing entrained air is subjected to an increasing degree of vacuum between 500 DEG  and 0.5 DEG  Torr. for a period of time whilst maintaining the viscosity of the dough at such a level as to permit any entrained air to move to and be extracted from the surface of the dough.  The dough is then preferably subjected to a constant degree of vacuum for a time. The polymer is preferably poly-methyl, -ethyl or -butyl methacrylate and the monomer, methyl methacrylate.  The dough may then be made into false teeth.
Patent GB-497960-A (GB)
Title: Improvements in or relating to a fermentation process for the preparation of paper-pulp from bagasse and similarly incrusted cellulose fibres
IPC: D01C1/04
Filed: 1937-06-30
Abstract: In a fermentation process for the preparation of paper-pulp from bagasse and like fibres the shredded material is impregnated with a liquor containing bacteria cultured on or derived from the cellulosic material and a nutrient therefor.  The bacteria culture may be obtained by sterilizing water with chlorine adding between 1/2 and 5 per cent of nutrient immersing a cellulosic material having nutrient thereon in the solution at blood heat and gradually lowering the temperature over a period of 14 days.
Patent GB-1055323-A (GB)
Title: Xeroprinting reproduction
IPC: G03G16/00
Filed: 1964-05-01
Abstract: 1,055,323. Deformation image forming. RANK XEROX Ltd. May 1, 1964 [May 3, 1963], No. 18250/64. Heading G2H. An apparatus for reproducing an original comprises means to form a deformation image on a smooth dielectric surface 13 Fig. 3, means for applying an electrostatic charge to the image bearing surface, developing means for applying electrostatic developer particles, and means for transferring the deposited particles to a secondary support. The apparatus for forming the deformation is generally similar to that described with reference to Specification 1, 049, 881. Apparatus is described, Figs. 8 and 9 (not shown). Wherein the image on rotary drum 10 passes through, charging, exposure, heating, cooling, recharging, developing, transfer and erasure stations. Copy sheets to the transfer station under the control of a photo-electric detector 88 and are fed from the transfer station by an endless conveyer. The required number of copies is selected by a selector switch 97 in a control circuit Fig. 10 (not shown).
Patent GB-153062-A (GB)
Title: Improved manufacture of tools of high speed metal
IPC: B23B31/00
Filed: 1919-07-22
Abstract: 153,062. Moore, J. B. July 22, 1919. Percussive drills.- Composite tools having a cutting part of highspeed steel and a shank of low-grade steel have the shank formed with an enlarged portion 20, Fig. 4, with a tapered bore to receive the tapered and screwed or grooved top 11 of the cutting part. The parts are heated and the metal of the part. 20 is spun into the grooves of the part 11. In the case of a twist drill, the metal of the shank is pressed into the flutes. In other tools the part 11 is grooved longitudinally. The parts may in addition be brazed together. The shank may be distorted by rolling or swaging and finally the surplus metal of the shank is removed and the tool finished. Reference has been directed by the Comptroller to Specifications 11703/07, and 3496/08, [both in Class 83, Metals, Cutting &c.], 20513/11, and 5471/12, [both in Class 83 (iii), Metals, Cutting].
Patent GB-694502-A (GB)
Title: Improvements in or relating to heavy hoisting blocks and tackle
Inventor: PAXTON JOHN MCGREGOR
IPC: B66D3/06
Filed: 1950-07-21
Abstract: 694,502. Hoisting blocks. COSTAIN, Ltd., R. Sept. 19, 1951. [July 21, 1950] No. 18274/50. Class 78 (v). The rope in passing between upper sheave block 1 and lower sheave block 2 passes round auxiliary sheaves 7 and 8 and is secured at 9 to the upper block 1, the other end passing at L5 to a winch drum by which a pull is applied thereto to lengthen or shorten the distance between the blocks. Sheave 7 is pivoted to upper block 1 so as to swing backwards and forwards: and sheave 8 is pivoted likewise to lower block 2 and additionally rotates axially, the rotation being limited by a shoulder abutment. If desired, the pull may be applied to both ends of the rope instead of at one end.
Patent GB-1117353-A (GB)
Title: Improvements relating to ball-type screw and nut devices
Inventor: SHEFFIELD BERNARD RAYMOND
IPC: F16H25/22
Filed: 1965-04-30
Abstract: 1,117,353. Screw-and-nut gearing. PLESSEY CO. Ltd. 15 April, 1966 [30 April, 1965], No. 18275/65. Heading F2Q. In a recirculating ball type screw and nut device, the screw comprises a helical coil 1 of stainless steel or high carbon hard drawn spring steel wire around a bar or tube 2 of silver steel having a diameter slightly greater than the free internal diameter of the coil 1, a coil of stainless steel wire 3 being interposed between the turns of the coil 1 to maintain the latter at a predetermined pitch. The nut comprises a thread insert 4 of circular section wire held at the required pitch by radial inserts 5, 6 in the nut body 7 or by internal screw threads in the nut body. Alternatively the insert may be a coil of wire (11) of generally trapezoidal section (Figs. 2, 5, not shown). A return path for the balls 8 is provided either through the nut body 7 or by an external tube. In Figs 3-5 (not shown) a metal insert (14) in an axial slot in the coil (11) has vanes (15) which deflect the balls (8) in each turn of the coil (11) back to the start of their respective turns.