baber/WOPTO huggingface dataset:
Patent GB-103046-A (GB)
Title: Improvements in and relating to Electric Discharge Apparatus.
IPC: H01C7/12
Filed: 1916-03-28
Abstract: 103,046. British Thomson - Houston Co., (General Electric Co.). March 28, 1916. Drawings to Specification. Resistances.-The resistance of an electric discharge-device consists of a conducting-compound, the resistance of which is greatly increased by the heating effect of a discharge. The compound preferably employed is lead peroxide in the form of a powder or solid; but compounds such as bismuth dioxide, sodium bismuthate, and barium nitrate may be employed. The resistance of lead peroxide may be increased by mixing with it barium peroxide, alumina, ammonium tetraborate, galena or carborundum; or decreased by distributing through it conducting granules. A catalytic agent such as manganese dioxide may be mixed with it to absorb oxygen from the atmosphere to replace that lost by the reduction of lead peroxide when a discharge passes.
Patent GB-113357-A (GB)
Title: Improvements connected with Spectacles.
Inventor: ODELL GEORGE HENRY
IPC: G02C7/16
Filed: 1917-03-29
Abstract: 113,357. Odell, G. H. March 29, 1917. Spectacles are provided with shieldportions a which are shaped and disposed so as to protect the outer angle of each eye and to project rearwardly from the lens; the shield-portions are provided with clips b enabling them to be readily attached to or detached from the eye wires c. The shield-portions may be made of vulcanite, and the clips may be in the form of metal tongues riveted to them or may be moulded therewith. Grooves a<3> may be provided in the shield portions, and slots e may be cut from them so that they may project in front of the lens frame.
Patent GB-649444-A (GB)
Title: Improved process for the production of olefins
IPC: C07C5/32
Filed: 1948-02-17
Abstract: A mono-olefine or alkylated aromatic hydrocarbon is dehydrogenated in the vapour phase by contacting it with a catalyst consisting predominantly of iron oxide promoted with a minor amount of alkali metal or alkaline earth metal oxide. Butenes may be dehydrogenated to butadiene and ethylbenzene to styrene; propyl and butyl aromatics are also mentioned as starting materials.  The amount of iron oxide in the catalyst is preferably in the range 50-99.5 per cent, and promoter, e.g. potassium oxide, 0.5-20 per cent.  Stabilizers such as aluminium, copper, magnesium, zinc, chromium or zirconium oxides may also be present. The reaction is preferably carried out in presence of 1-20 volumes of steam per volume of hydrocarbon and at a temperature of 1050-1300 DEG  F.  Examples are given of the preparation of butadiene.ALSO:A catalyst consisting mainly of iron oxide promoted with an alkali or alkaline earth metal oxide is used in the dehydrogenation of monoolefines or alkylated aromatic hydrocarbons.  The catalyst is prepared by treatment of a ferric nitrate solution (which may contain other salts, e.g. of Cu, Al, Cr, Mg, Zn or Zr) with ammonium hydroxide or potassium hydroxide solution, removal of the precipitate by filtration, mixing it with a solution of potassium nitrate (which may contain cupric nitrate), and then drying, heating, cooling and pilling.  The copper, magnesium and chromium oxides act as stabilizers.
Patent GB-1156611-A (GB)
Title: Process and Apparatus for Moistening Tobacco Bales
IPC: A24B3/02
Filed: 1967-01-31
Abstract: 1,156,611. Conveyers. SCHIFF & STERN G.m.b.H. 31 Jan., 1967 [4 Feb., 1966], No. 4746/67. Heading B8A. [Also in Division A2] In an apparatus for moistening tobacco bales (see Division A2) the bales 2 are transported stepwise through the apparatus on carrying grates 1 which are supported outside the apparatus by their wheeled undercarriages 3 and within the apparatus by a roller conveyer (29). A reciprocable cable pull 32 passes round two fixed rollers 33, 34 and two movable rollers 36, 37 which latter are mounted on the end of a piston-rod 41 of an hydraulic cylinder 35. Bars 39, 40, connected to that part of the cable pull 32 that lies between rollers 34, 36, carry noses 42 that each engage a counter support (43) carried by the grates 1: on the grate 1 about to be loaded into the apparatus and on the grate 1 about to be unloaded from the apparatus, and convey them to the left on the actuation of the cylinder 35 and rod 41. The noses 42 pivot anticlockwise during the return movement of the piston-rod 41.
Patent GB-608093-A (GB)
Title: Improvements in and relating to thread guides
IPC: B65H57/06
Filed: 1946-02-15
Abstract: 608,093. Making thread guides. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 15, 1946, No. 4761. Convention date, Feb. 24, 1945. [Classes 83 (ii) and 83 (iv)] [Also in Group IX] Powder metallurgy.-Thread guides are made from spiral elliptical tubes formed from mixtures of powdered hard metal carbides and cobalt. A cemented carbide mixture is extruded in tubular form and whilst plastic the tube may be bent to shape as shown in Fig. 1 and then dried and sintered. Alternatively, the tube may be sintered before bending, which is then effected hot on a mandrel, as described in Specification 588,305. The tube may be mounted at approximately its mid-point on a metal supporting rod 6. Specification 563,397 also is referred to.
Patent GB-577981-A (GB)
Title: Improvements in or relating to safety devices for use in power-transmitting apparatus
IPC: D03D49/58
Filed: 1943-03-24
Abstract: 577,981. Safety devices for looms. SULZER FRERES SOC. ANON. March 24, 1943, No. 4771. Convention date, April 1,. 1942. [Class 142 (i)] [Also in Group XXIV] Consists in a safety device for preventing damage to mechanism in the event of the movement of a member thereof becoming obstructed or prevented. A shaft 1, Fig. 1, drives a member 2 through a lever 6 the pivot 7 of which is mounted on a rod 8 slidable in bearings 9, 10 fixed to the machine frame. A collar 11 on the rod is urged against the bearing 10 by a spring 12. While the machine is operating free from trouble, the pivot 7 remains stationary, but should the member 2 be prevented from moving the pivot 7 will yield and the lever 6 be brought to the position 6a the consequent movement of the rod 8 being utilized, through a lever 13 and shaft 14, to stop the mechanism. In a modification, Fig. 2, a cam 17 actuates a member 15 through a lever 20 the pivot 21 of which is carried on a rod 24 slidable in fixed bearings 22, 23. Springs 27, 27a bearing against plates 26, 26a and collars 28, 28a on the shaft maintain the latter in mid-position. Obstruction of member 15 causes the pivot 21 to yield and move rod 24 this movement, through a recess 30, ball 31, rod 33 and lever 34, actuating a control shaft 35. In further modifications, the yielding pivot is (1) the axle of a spur gear and (2) the axle of a helical gear. The invention is particularly applicable to a loom employing ordinary shuttles. Thus, in Fig. 5 a shuttle 40 is brought to rest by brakes in the position shown by full lines, in which position the weft thread 41 may be freed from the shuttle by a rod 42 entering an opening 47 and forcing apart the cheeks 48 of the gripper. The rod 42 is actuated by an eccentric 46 on a driving shaft 45 through a lever 43 with pivot 49 carried on a rod 52 slidable in bearings 50, 51 under the pressure of springs 55 and plates 56. If the shuttle has not reached its proper position, the rod 42 is obstructed and the pivot 49 and rod 52 caused to move so as to actuate a lever 57 and control shaft 58 described with reference to Fig. 2. The rod 42 is also obstructed by a hook 62 and end 61 of a lever 59, if the shuttle does not reach the braking position. If it does, the lever 59 is depressed. A rod 70 is also obstructed if the shuttle has not been picked. A further rod 71 normally rides over a member 74 which is retained in position by a feeler needle 75 urged against the weft thread 41 by a spring 77 and arm 76. If the thread breaks, the member 74 is so rotated as to obstruct the rod 71. Obstruction of rod 70 or 71 causes movement of rods 67 to actuate the stop rod 58.
Patent GB-365369-A (GB)
Title: Improvements in or relating to toy building units
IPC: A63H33/08
Filed: 1931-02-16
Abstract: 365,369. Constructional toys. BROUGHAM, L. E., Brillig, Riddlesdown Avenue, Purley, Surrey. Feb. 16, 1931, No. 4919. [Class 132 (iii).] The invention relates to toy building bricks 1 having interlocking projections and recesses and consists in providing in some of the bricks slots 19, Fig. 3, or 21, Fig. 10, into which either cantilevers 25 or beams or lugs, Fig. 13, for the attachment of other parts, are fixed. Gutters, Fig. 11, may in this way be fixed to a model. The set may also comprise a frame hingedly carrying a door 8, Fig. 4, and having projections 2 and recesses 3 to engage adjacent bricks. Side projections 18 to engage the slots 19 may be provided. The gable end of a model is finished off with bricks 1c having a recess and a groove 12 for tile bearers 13 carrying metal tiles 14.
Patent GB-1101975-A (GB)
Title: Method of controlling a polymerisation process in a closed container
IPC: C08F2/18
Filed: 1965-02-04
Abstract: Ethylenically unsaturated monomer(s) are polymerized in suspension or emulsion in a closed vessel by including in the liquid medium for at least part of the process an inert substance which is more volatile than the monomer(s) and whose solubility in the monomer(s) is greater than that in the polymer being produced, and making repeated observations of the pressure or its rate of change in the vessel in order to control the process.  The volatile substance may be added before, or intermittently during, the polymerization and may be propane, butane, pentane, hexane and/or cyclohexane, or mixtures such as petrol ether and ligroins, a C1- 2 halogenated hydrocarbon or diethyl ether.  The monomer may be (1) a mixture of styrene, divinyl benzene and ethyl vinyl benzene; or (2) styrene and may be polymerized in an aqueous phase containing polyvinyl alcohol, polystyrene, benzoyl peroxide and petroleum ether and the polymer may be sulphonated to form a cation exchange resin; or the monomer may be (3) vinylidene chloride which may be polymerized in the presence of propane gas, and an aqueous phase containing ammonium persulphate, sodium bisulphite, sodium bicarbonate and sodium lauryl sulphonate. The polymers may be expanded by treatment with steam.
Patent GB-452423-A (GB)
Title: Improvements relating to hydraulic machines for removing articles from shafts and for like purposes
IPC: B25B27/02
Filed: 1935-02-16
Abstract: 452,423. Removing articles from shafts. REES, T. A., Hollywood, Cantley Lane, Doncaster. Feb. 16, 1935, No. 5009. [Class 61 (iii)] A hydraulic machine for removing piston-rods from cross-heads or for like purposes comprises small and large cylinders 2<a>, 3<a>, a small piston 2 operated by a screw 1 and a large piston 3 operated by the pressure fluid and adapted at its rear end to engage the piston rod &c. to be removed, the cross-head connected to the piston rod being engaged by a cross-beam connected to shackles 7 carried bv a beam 6 which has a threaded bore engaging the threaded exterior of the cylinder 2<a>. Reference has been directed by the Comptroller to British Specification 419,700, and U.S.A. Specification 1,879,883.
Patent GB-670431-A (GB)
Title: Magnetic focussing device for cathode ray tubes
IPC: H01J29/64
Filed: 1949-02-24
Abstract: 670,431. Cathode-ray tubes. COURT, P. R. J., and PYE, Ltd. Feb. 20, 1950 [Feb. 24, 1949], No. 5062/49. Class 39 (i). [Also in Group XXXV] A focusing device comprises spaced annular magnetic members, the flux in the gap therebetween being produced by magnetizing means and varied by the relative rotation of teeth which are directed towards each other and arranged about the two annular members and at the ends of the magnetizing means. An annular permanent magnet 1, or coil in which the current is not adjustable, is secured by screws 4 between flanged sheet-metal poles 2, 3 which define the focusing gap. The pole 2 and a ring 5, rotatable on the pole 3, are each provided with three teeth, the edges of which may be inclined, or rectangular, to define an adjustable gap which is smaller than the focusinggap.- Adjustment is effected by a lever 7, secured to a tooth on the ring 5 and operated. by an arm extending through the cabinet of the television receiver or by link mechanism or by a gear-wheel engaging teeth on the ring 5. The arrangement is supported from the cabinet by a ring 12, screws 11, and a frame 10 having an embossed part to permit rotation of the ring 5. A centring device comprising rotatable rings 21, 22, diametrically magnetized, and insulating rings may be provided as described in Specification 670,021. Specification 648,793 also is referred to.
Patent GB-1452925-A (GB)
Title: Control ofomoisture content in particulate materials
IPC: F24F3/14
Filed: 1973-02-01
Abstract: 1452925 Treating tobacco AMF Inc 23 Jan 1974 [1 Feb 1973] 5195/73 Heading A2C [Also in Division F4]  A method of standardising the moisture content and temperature of process tobacco is effected in apparatus as shown in Fig. 1, comprising a spiral tray 11, means for feeding particulate material to the spiral tray 11 e.g. a feed conveyor, drive means 19 for oscillating the spiral tray with an upward and rotary motion to cause particulate material to ascend, means for removing particulate material from the top of the spiral tray e.g. vibratory conveyor 20, means for recycling air through the spiral tray, means for cooling and adding water vapour to the recycling air, sensors positioned for measuring the temperature and relative humidity of the recycling air and control means for adjusting the cooling rate and the rate of addition of water vapour in accordance with any difference between that measured and that required.
Patent GB-1147264-A (GB)
Title: Improvements in or relating to methods of manufacturing permanent magnets
Inventor: GOULD JOHN EDWARD
IPC: C22C38/10
Filed: 1967-02-03
Abstract: 1,147,264. Heat-treating permanent magnets. CENTRE D'INFORMATION DU COBALT SOC. ANON. Jan.16, 1968 [Feb.3, 1967], No.5258/67. Heading C7A. Cast or sintered permanent magnet alloys containing in percentage by weight: Al 6 - 8 Ni 13 - 16À5  Co 30 - 38 Cu 2-6  Ti 4 - 7 Nb + Ta 0À4 - 2 Fe balance with or without up to 3% in total of one or more of Ce, Cr, S, Se, Pb, Sn, Te, Si, Sb, Zr, Mn, Mg, W, Mo, V, P are cooled from 1250‹C. to 600‹C. at an average rate of 0À5 to 3‹C. /sec., and are then tempered in the range 500‹ - 650‹C. A magnetic field may be applied to the alloys during cooling, being applied in the direction of predominant crystal orientation in the case of pieces having a columnar structure obtained by directional solidification of a casting. As exemplified, alloys are given a two-stage tempering within the stated range.
Patent GB-491014-A (GB)
Title: Process for the manufacture of compounds of the etio-cholane series
IPC: C07J41/00
Filed: 1937-02-22
Abstract: Acyl compounds of cyanhydrins of the etiocholane series are prepared by subjecting such cyanhydrins to the action of acylating agents. Acylating agents mentioned include acid anhydrides, acid chlorides, cyanic acid and its isomers, and derivatives thereof such as phenyl isocyanate.  The cyanhydrins which form the starting materials for the process of the present invention are prepared as described in Specification 488,904, and consist chiefly of the cyanhydrins of the male sexual hormones androsterone and dehydroandrosterone.  Instead of the cyanhydrins of the free hydroxy ketones, there may be used cyanhydrins of their esters or ethers.  In such cases it is preferred to treat the cyanhydrins with acylating agents which will introduce a radical which is different from the radical already present.  In examples: (1) androstenolone cyanhydrin is heated with acetic anhydride to give androstenolone cyanhydrin diacetate; (2) androstenolone acetate cyanhydrin is treated with acetic anhydride as in example (1) to give the same androstenolone cyanhydrin diacetate.
Patent GB-1204593-A (GB)
Title: Pulse detection circuit
Inventor: ZIJTA PETER JOANNES
IPC: H03K5/153
Filed: 1968-02-02
Abstract: 1,204,593. Pulse shaping circuit. INTERNATIONAL BUSINESS MACHINES CORP. 2 Feb., 1968 [2 Feb., 1967], No. 5331/68. Heading H3T. A pulse thresholding circuit (more particularly for use in document scanning apparatus) operating on the leading or trailing edge of pulses having uniform edge widths such as are produced by scanning systems of finite aperture comprises a comparator to the inputs of which are applied the signal pulse and a delayed signal pulse, one input path including an attenuator and the delay being such that an attenuated leading edge terminates or a trailing edge starts during the corresponding edge of the unattenuated pulse. In Fig. 5 the comparator comprises transistors 40 to 43 having a common emittercurrent source 45. The inputs to the comparator comprise respectively a variable threshold voltage 28, an attenuated pulse I (Fig. 4), a pulse II with one unit delay and an attenuated pulse III with two units delay. Initially the emitter current flows to transistor 40. When the attenuated pulse I exceeds the threshold level the current diverts to transistor 41 but when the delayed pulse II exceeds this the current diverts to transistor 42 and thus to output inverter 52. It remains in this path until delayed pulse II at 42 decreases below the double delayed and attenuated pulse III at 43 whereupon the current is diverted from the output circuit to transistor 43. The rectangular pulses shown in the lower line of Fig. 4 are thus obtained. With 50% attenuation and 50% of the rise time as a delay unit the comparator changes over at the 50% amplitude points but other points can be obtained with other values and for non-linear edge slopes. The threshold input prevents operation by small amplitude pulses and a diode 33 limits the input pulse excursions. In Fig. 6 (not shown), the second delay and attenuator is omitted and the transistor (57) corresponding to 43 stores in an emitter capacitor (59) the peak amplitude of the attenuated signal applied to transistor 40 and this capacitor is coupled by a diode (58) to the common emitter circuit so that the output pulse terminates when the delayed input pulse falls below this level. In Fig. 7 current normally flows through diode 65, resistor 63 and transistor 62. A positive-going input pulse causes 61 to conduct and the voltage across a capacitor 66 follows the input pulse. This continues until the delayed pulse becomes of equal value whereupon the bases become of equal voltage and conduction in both transistors ceases. Capacitor 66 stores the attenuated peak value of the pulse and capacitor transistor 62 conducts again only when the delayed pulse falls below this value.
Patent GB-510856-A (GB)
Title: Improvements in and relating to coin-operated vending apparatus
IPC: G07F13/08
Filed: 1939-02-18
Abstract: 510,856. Coin-freed apparatus for vending ink for fountain pens. FUDEN, A. Feb. 18, 1939, No. 5492. Convention date, March 5, 1938. [Class 27] Coin action, weight.-A coin-freed apparatus for vending ink for fountain pens comprises a casing A, Figs. 1 and 2, having an ink well 33 supplied with ink from a reservoir 30 through a pipe having float-actuated regulating means to ensure a constant supply. The casing A has an opening 23 through which a fountain pen 28 can be inserted into the ink well, the opening being normally closed by a sliding door 17. To obtain a supply, a coin is inserted in a shoot 1 'and tilts a detent 2 from a notch 3 in a rod 4 extending into the shoot, the rod being jointed to a lever 6 which is now rocked by a handle 5 to withdraw the rod 4 and allow the coin to drop. The lever 6 also raises, against the action of a spring 8, a slide 11 connected by a link 7 to a slide 11' which is held raised by a pivoted detent 9 controlled by a spring 10. The coin next rocks a lever 14 to release a pawl 16 from a ratchet toothed rack on the door 17. This allows a lever 18 under the action of a spring 19 to raise the door and uncover the opening 23, the door being held in its raised position by a flap 29 pressed down by a spring 32. Finally the coin trips a lever 24 which, through a lever 27, releases the detent 9 and allows the slide 11' tc move down into engagement with a lateral projection from the door 17. Insertion of the pen 28 into the well 33 for filling releases the flaps 29 so that the door is moved into contact with the pen and the pawl 16 is re-engaged with the rack. When the filled pen is withdrawn, the spring 8 moves the slide 11<1> fully down and closes the door. The parts of the apparatus coming in contact with the pen are covered with felt pads to avoid damage to the pen and wipe off adhering ink.
Patent GB-500399-A (GB)
Title: Artificial minnow
IPC: A01K85/16
Filed: 1938-02-22
Abstract: 500,399. Fishing - tackle. GASQUE, P. E. Feb. 22, 1938, No. 5504. [Class 48] An artificial minnow has a propeller 1, Fig. 1, rotated by movement through the water and mounted on pintles 2 in head and tail bearings 3 connected by a wire support 11 surrounding the propeller. The propeller is S-shaped in cross section with curvature and width decreasing from head to tail. In a modification, Fig. 5, the propeller 14 is mounted on a rod 13 which may be surrounded by strips extended from the propeller or, as shown, by a helical Wire 17. Hooks 15, 15<1> are mounted on or carried by the support 11. The head 18 may consist of a small mass of lead and the relative position of the bearings may be adjustable.
Patent GB-1090835-A (GB)
Title: Brake operating mechanisms
IPC: F16D65/14
Filed: 1965-02-09
Abstract: 1,090,835. Brake actuator. DUNLOP RUBBER CO. Ltd. Feb. 9, 1965 [Feb. 14, 1964], No. 5514/65. Heading F2E. In brake operating mechanisms of the rolling body and ramp kind the slope traversed by the body during initial transverse relative movement of the ramped portions, to take up clearance, is steeper than the subsequent slope engaged during the development of braking thrust. The Specification describes a disc brake actuating mechanism wherein balls are disposed between two relatively rotating plates.
Patent GB-529708-A (GB)
Title: An improved stop for pit tubs
IPC: B61K7/16
Filed: 1939-02-21
Abstract: 529,708. Railway stops. BARLOW. P. H., BARLOW, A., and BARLOW, G. Feb. 21, 1939, No. 5726. [Class 104 (ii)] A stop for runaway mine tubs is released by an arm N on a shaft K adapted to be rotated to releasing position by the runaway tub axle striking an arm D<SP>1</SP> protruding through a slot H in the case I so that a second arm D<SP>2</SP> on the pivoted tumbler D is raised through the slot H while the corner M of D is caught by a spring arm F. The second axle of the tub then engages D<SP>2</SP> and carries it along the slot H so that rollers B on the pivotal spindle A of the tumbler are carried along guides E, thereby lowering D<SP>2</SP> out of contact with the axle. This movement of A is transmitted by the links C, L to the shaft K.