baber/WOPTO huggingface dataset:
Patent GB-341518-A (GB)
Title: Improvements in electrical generating machines to give drooping voltage characteristics of the same nature at varying outputs
IPC: H02K23/20
Filed: 1929-10-17
Abstract: 341,518. Dynamo-electric machines. GREENWOOD & BATLEY, Ltd., Albion Works, Leeds, and CARRICK, J. H., 7, Hvde Park Road, Harrogate. Oct. 17, 1929, No. 31522. [Class 35.] Exciting.-In a drooping characteristic dynamo having a series excited auxiliary field system in opposition to the shunt or compound main field, the main brushes are arranged substantially diametrically opposite one another on the commutator and an additional pair of brushes is arranged at points corresponding to points on the armature lying within the effective path of the main flux whereby the main shunt field winding which is energized from these brushes is excited at a voltage due substantially wholly to the main flux and which is substantially constant at all loads. In the form shown, the main poles 4 carry a winding 10 connected to the brushes 8, 9 the voltage across which is due to the main flux only. A cumulative compound winding is also placed on the poles 10. The auxiliary poles 5 are series wound and oppose the main poles, the voltage across the main brushes 6, 7 being, therefore, that due to the resultant of the main and auxiliary pole fluxes. The voltage may be adjusted by tapping the coils on the poles 5 or by using a diverter in conjunction with these coils. In a modified form, the compound main winding may embrace both the main and auxiliary poles. The auxiliary poles will then aid the main poles at no load but will require more series ampereturns. Commutating poles may be used if desired.
Patent GB-1160963-A (GB)
Title: Improvements in or relating to Modulator Circuit Arrangements for use on Radio Frequencies
IPC: H04L27/04
Filed: 1966-07-13
Abstract: 1,160,963. Inverters. MARCONI CO. Ltd. 13 July, 1966 [6 Aug., 1965], No. 31553/66. Heading H2F. [Also in Divisions H3 and H4] A modulator circuit arrangement comprises two switching elements VT 1 and VT2 connected in series across a power supply and driven to conduction alternately at the operating frequency, the junction of the two elements being connected to a series resonant circuit L and C, and the load R being connected across the capacitor C. Stray capacitance, shown as Cs, can be tuned by a parallel inductance (L1, Fig. 4, not shown). A series resonant circuit (Lh and Ch, Fig. 5, not shown) tuned to the third harmonic of the operating frequency may be arranged in parallel to L and C to improve the efficiency. The load R may be connected to the capacitor C through a series inductance (L, Fig. 7, not shown). A diode M is arranged in parallel with VT1, so that a pulse-width modulated input to the switching elements produces an amplitude-modulated output.
Patent GB-1048763-A (GB)
Title: Reinforced porous polyurethane foam
Inventor: WELLER BRION
IPC: C08J9/42
Filed: 1962-08-17
Abstract: Reinforced porous materials are manufactured by impregnating the interconnected cells of a resilient polyurethane foam material with a fluid composition capable of being hardened by heating, and heating the impregnated material to form a substantially rigid structure. The density of the foam should suitably lie in the range of from 0.25 to 15 pounds per cubic foot.  The hardenable composition must be fluid at the time of impregnation at temperatures between 50 DEG C. and 150 DEG C., but may be solid at normal temperatures.  Suitable compositions are those based on an epoxy resin with an anine hardener, or a curable polyester resin with a peroxide initiator. Fillers, pigments and other colouring materials may be incorporated in the hardenable compositions.  Divided silicas are mentioned as fillers.  Solvents such as toluene may also be incorporated to facilitate impregnation.
Patent GB-1101546-A (GB)
Title: Variable-ratio power transmission mechanisms
IPC: F16H57/02
Filed: 1966-07-14
Abstract: 1,101,546. Change speed gear. GENERAL MOTORS CORPORATION. 14 July, 1966 [16 Aug., 1965], No. 31610/66. Heading F2D. In a change speed gear, for front, mid- or rear-engined motor vehicles, e.g. sports oars, a constant-mesh section in a housing 13 provides Second to Fifth gear ratios and a sliding gear section in a chamber 7 provides First gear ratio by-passing the constant-mesh section. An input shaft 3, driven from the vehicle engine via a clutch disengaged during shift, is piloted at 22 in an intermediate shaft 19 and drivingly connected thereto by an internally splined muff 11. An output shaft 91, terminating in a final drive bevel pinion 95, is piloted at 94 in a main shaft 51 and drivingly connected thereto by an internally and externally splined muff 59. The opposite end of the main shaft is piloted and journalled in a further shaft 35. Change ("pick-off") gears 31, 33 are respectively removably splined on the intermediate shaft and the further shaft 35. A countershaft 47 is rotatably mounted on the intermediate shaft 19, is driven from the further shaft 35 via gears 43, 45, and has formed thereon gears 75, 73, 67 respectively in constant mesh with gears 71, 69, 63 free on the main shaft 51. Synchromesh double clutch sleeves 77, 65 actuated by shift levers and forks respectively establish Second and Third gear ratios by engagement with the gears 71, 69 and Fourth and Fifth gear ratios by engagement with the gear 63 and, to drivingly connect the further and main shafts 35, 51, the gear 43. The ratio of the change gears 31, 33, shown 1/1, is chosen to suit tyre size or racing track conditions. A gear 61 splined on the muff 59 is axially slidable, from a neutral position, by a shift lever and fork, to the left to establish First gear ratio by engagement with a gear 1<SP>2</SP> formed on the muff 11, and to the right to establish Reverse by engagement with one gear 85 of an idler 81, the other gear 87 of which constantly meshes the gear 75. The final drive bevel pinion 95 meshes a crown-wheel 98 of a differential between opposed swing axles. The chamber 7 for the sliding gear section is formed in a differential housing 4; the housing 13 for the constant mesh section is bolted to the housing 4 by way of support and adaptor plate 15; and a housing 20 for the change gears 31, 33, provided with a bolted-on cover 28, is bolted to the housing 13.
Patent GB-733299-A (GB)
Title: Bicycle handle-bars
IPC: B62K21/16
Filed: 1953-11-16
Abstract: 733,299. Cycle handle-bars stems. PAES, H. W. Nov. 16, 1953 [Nov. 17, 1952], No. 31658/53. Class 136(3). A bicycle handlebar 1 is combined with a stem 2 adapted to move axially and to rotate relative to a stem tube 3, an expanding tube 4 integral with the stem tube and having a bolt 6 whose head is entirely enclosed within the stem tube 3, means for releasably locking the handlebar stem relative to the expanding tube and means associated with the stem and operable when the stem is free relative to the expanding tube for engaging the head of the bolt so that the handle-bar stem may be used as a wrench for rotating the bolt. A disc 12 is fixed to the end of the stem 2 and has an opening complementary with the shape of the head of the bolt 6. In erection the expanding tube 4 is placed in the front fork of the bicycle and the stem 2 is mounted in the part 3. The handlebar 1 is then turned to rotate the bolt 6 and a conical part 7 is pulled into the tube 4. In order that the handle-bar may be used for steering, a spacing sleeve 13 is applied to keep the part 12 at a distance above the head of the bolt 6. The stem 2 is fastened to the stem tube 3 by a wedge 9 which passes through slots 8, 10 in the parts 3, 2 respectively. A sleeve 11 locks the wedge in position. In a modification shown in Fig. 3, the disc 12 is replaced by a bush 14 fixed to the stem 2 by a pin 15. This pin also prevents the head of the bolt from passing completely through the opening in the bush 14.
Patent GB-629919-A (GB)
Title: Improvements in or relating to electro-magnetic eddy-current couplings
IPC: H02K49/04
Filed: 1947-12-01
Abstract: 629,919. Eddy current couplings. KREBS, E. W. Dec. 1, 1947, No. 31694. [Class 35] The driven member of an eddy current coupling constitutes a disc of magnetic material lying between two electromagnets, each having two polar members constituting rings coaxial with the axis of rotation, and in order to reduce the inertia of the driven member it has apertures lying between the aligned poles. In the form shown in Fig. 1 the two magnets A<1>, A<4> are united by circumferential bolts with distance pieces A<3> of non-magnetic material and the apertures in the disc C<2> (Figs. 2, 3) lie in each of the disc portions between the annular pole pairs N<1>, S<2> and N<2>, S<1> and are so arranged as to make the flux density in both regions the same. In a modified construction (Fig. 5), each annular pole member has a ring of pole pieces L or L<1> secured to it to form an imbricated pole structure and polepieces of unlike polarity of the two electromagnets are aligned; the apertures in the driven disc may be constituted by radial slots extending across the field area. The portion of the disc lying between two rings of apertures may be cut away, for example to form spokes, still further to reduce the inertia. The rim of the disc may carry an inserted ring of high conductivity. Ventilation may be set up by fins G, Fig. 1, and an enclosing casing G<1>.
Patent GB-162024-A (GB)
Title: A new or improved engine or motor
IPC: F02B75/26
Filed: 1919-12-18
Abstract: 162,024. Small, E., and Smith, W. S. Dec. 18, 1919. Reels and reel-carriages.-The cylinders of an engine primarily intended for a hoist, winch, or capstan, are arranged within and longitudinally of a drum a, and operate crank-shafts e provided with toothed wheels f which engage a stationary wheel in the casing g. Distribution is effected by a disc valve h, provided with alternate admis. sion and exhaust ports, which is adjustable for reversing or for varying the expansion, and is mounted within a bearing p and around a trunnion n formed in one with a ported plate which covers the ends of the cylinders. According to the Provisional Specification, spur, friction, or cam driving-gear may be used in lieu of the bevel gear. The cylinders may be stationary. and a rotary valve provided.
Patent GB-466949-A (GB)
Title: Improvements in or relating to the electroplating of aluminium or aluminium alloys
IPC: C25D5/44
Filed: 1936-11-19
Abstract: Articles of aluminium or an aluminium alloy are dipped in a solution of a zincate containing a copper salt to form a coating on which copper, brass, cadmium, silver, gold or other metal is then deposited by electric deposition.  Reference is made to a previous proposal to employ such a dipping solution in which however the preliminary coating is removed by nitric acid before electroplating.  The preliminary coating may according to the present invention be applied and removed several times but is always renewed before the electroplating step.  The concentration of caustic alkali in the zincate solution should be 3-15N and that of zinc at least normal. The content of copper, which should be principally in monovalent form, e.g. as potassium copper cyanide, should be 1,5-8,0 gms. per litre.  A reducing agent such as sodium sulphite may be present.
Patent GB-1389479-A (GB)
Title: Substituted 2,6-dinitroanilines and herbicidal compositions containing them
IPC: C07C205/12
Filed: 1972-07-06
Abstract: 1389479 Substituted 2,6-dinitroaniline compounds AMERICAN CYANAMID CO 6 July 1972 [25 Aug 1971] 31784/72 Heading C2C Substituted 2,6-dinitroaniline compounds of the general formula: in which R is 1-ethylbutyl, 1-ethylpropyl, 1- methylpropyl or 1-methylbutyl are prepared by reacting a compound of the general formula: with an amine or the formula RNH 2 . The compounds have herbicidal properties.
Patent GB-189990-A (GB)
Title: Improvements in taper washers
IPC: F16B43/02
Filed: 1921-11-29
Abstract: 189,990. Heeley & Peart, Ltd., and Peart, F. W. Nov. 29, 1921. Washers. - A cast metal tapered washer is formed with recesses 2 on one or both faces which are bounded by flanges 4 extending wholly or partly around the outer and inner edges thereof which are reinforced by one or more transverse ribs 5. The washer may be D-shaped, oval, round, &c., and the transverse ribs may be replaced by letters &c.
Patent GB-818062-A (GB)
Title: Improvements in or relating to the production of trimethyl borate
Inventor: MASON RONALD GEORGE
IPC: C07F5/04
Filed: 1955-11-08
Abstract: Trimethyl borate is produced by a process comprising, in a first stage, heating a mixture of boric acid and methanol in the presence of a solid dehydrating agent, distilling off the resulting trimethyl borate-methanol azeotrope and, in a second stage, breaking the azeotrope by adding a salt which forms a crystalline addition compound with methanol which is insoluble in trimethyl borate, separating the borate-methanol layer and submitting the latter to fractional distillation to separate the trimethyl borate from the methanol.  The same reagent may be used both as dehydrating agent and for breaking the azeotrope, suitable reagents being calcium chloride, zinc chloride, magnesium chloride, copper chloride, ferrous chloride, magnesium sulphate and zinc sulphate.  A yield of 95 per cent of trimethyl borate, based on the methanol used, may be obtained if the residual methanol and borate left after the distillation of the azeotrope formed in the first stage is recycled to the first stage of the next batch and the salt layer formed in the second stage is also recycled to the first stage of the next batch to be treated with fresh boric acid, methanol and dehydrating agent, and further if the rejected fractions in the final fractional distillation are recycled to the second stage of a succeeding batch.  In an example, boric acid, methanol and calcium chloride are heated to 60-65 DEG  C., the azeotrope b.p. 54.5 DEG  C. is distilled off and a residual methanol and borate fraction b.p. 54.5 DEG  to 64.7 DEG  C. is recycled to the first stage of the next batch; the azeotrope is stirred with calcium chloride for 30 minutes and allowed to settle into a borate-methanol layer and a calcium chloride layer which is recycled to the first stage of the next batch; the borate methanol layer is fractionally distilled to give (i) azeotrope b.p. 54.5 DEG  C., and (ii) fraction b.p. 54.5 DEG  to 68 DEG  C., which are added to the azeotrope from the next batch and treated with further calcium chloride in the second stage, and (iii) trimethyl borate b.p. 68 DEG  to 68.7 DEG  C. A flow sheet for a plant cycle is given.
Patent GB-1109838-A (GB)
Title: Titanium dioxide pigment and method of preparation thereof
Inventor: LONG RAY SMITH
IPC: C01G23/053
Filed: 1965-07-27
Abstract: A pigment grade, crystalline, acicular titanium dioxide having a cross-sectional diameter of 0.05-0.2 m , a length of 0.3-1.5 m , with a length: diameter ratio of 3-15, is prepared by mixing an aqueous colloidal suspension of TiO2, nucleating seed particles, prepared by heating e.g. at 60-90 DEG  C. for 4-60 mins. an aqueous solution of TiCl4 having a Cl-/Ti ratio of 1.5-4, preferably 1.6-2.3, a pH of 0.3-0.7 and a Ti concentration of 8-30 g./l., with an acidic TiCl4 solution having Cl-/Ti \sP 4, H+/T. \sP 4, a Ti concentration of 15-85 g./l., the colloidal solution providing 4-10 wt. per cent of the Ti values in the mixture, heating the mixture at \sF 190 DEG  C., preferably 210-260 DEG  C., for 0.5-5 hrs., under an autogenous pressure to hydrolyse the TiCl4 and separating the Ti values precipitated. The product may be subsequently calcined at 700-900 DEG C. for 0.5-6 hrs.  The product has a high tinting strength and hiding power, e.g. a tinting strength of 1850 to 1900 when hydrolysed at 190 DEG  C. for 2-5 hrs. without calcination, or 1950-2150 at 210-260 DEG C. for 0.5-5 hrs.
Patent GB-660348-A (GB)
Title: Improvements in and relating to filament coating apparatus
IPC: H01J9/06
Filed: 1949-12-14
Abstract: <PICT:0660348/III/1> Apparatus for coating a coiled filament comprises means for spreading apart the leading-in wires which are sealed into the mount so that the coils are stretched, and simultaneously reciprocating dipper mechanism whereby the filament is immersed temporarily in coating material.  In the preferred form, the coiled coil cathode 1 for a discharge lamp is supported on the mount 4 through leading-in wires 2, 3 which are spread apart by fingers 11, 12 rotated from a vertical plane into the operative horizontal position by a spring 17 and arm 18, which is secured to the shaft 15 rotatable in the head 16.  The finger support 14 is mounted on the shaft 15 so that raising the arm 35, and the member 24 secured thereto, lifts the cam 13 to permit rotation of the finger holder. Rotary movement is limited by the screw 19.  The tapered cam edges allow the spring 20 to open the fingers.  The arm 35 is carried by the reciprocating rod 26 which is also adapted to move vertically the trough 27, containing the electron-emitting coating, within the cup 29 fixed to the support 34.  The apparatus may be incorporated in the mount-making machine according to Specification 564,702, [Group XL].
Patent GB-1411065-A (GB)
Title: Prostaglandin compounds
IPC: C07C401/00
Filed: 1973-07-05
Abstract: 1411065 Cyclodextrin clathrates ONO PHARMACEUTICAL CO Ltd 5 July 1973 [6 July 1972] 32117/73 Heading C3U [Also in Division C2] Novel cyclodextrin clathrates of a prostaglandin of the formula wherein /VV indicates attachment of the methyl radical in R or S configuration, and mirror image enantiomers thereof are prepared by reacting prostaglandins of the above formula with cyclodextrin. Reference has been directed by the Comptroller to Specification 1,351,238.
Patent GB-957793-A (GB)
Title: Improvements in or relating to valve supports capable of withstanding high voltages
IPC: H01R33/76
Filed: 1960-09-19
Abstract: 957,793. Caps and holders for thermionic valves. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 19, 1960 [Sept. 22, 1959], No. 32118/60. Heading H2E. In a valve support capable of withstanding high voltages, comprising an electrically insulating container 1, having a base with mounting means 3 and a substantially flat valve holder 7, 9, detachably secured within the insulating container, at least the major portion of the base of the container which lies directly facing the connecting terminals of the valve holder is covered with a conductive layer 31 and the layer is connected to one of the connecting terminals by spring 19. The metal may extend on to the side walls of the container for a small distance and may be formed by pressing a plate-shaped or cup-shaped metal part directly against the material of the support during the extrusion thereof, the moulding material penetrating through apertures 33 in the metal part. A heater circuit resistance 25 may be arranged around the contacts 15 between the two plates 7 and 9.
Patent GB-466034-A (GB)
Title: Improvement in frames for spectacles or eyeglasses or other optical frames
IPC: G02C11/02
Filed: 1935-11-20
Abstract: 466,034. Spectacle frames. CUNDY, J. A. Nov. 20, 1935, No. 32164. [Class 97 (i)] [Also in Group XV] Spectacle or other optical frames are provided with grooves or cavities into which colouring matter may be introduced so that the apparent colour of the frame may be readily changed. Fig. I shows a groove a made in the back of the frame to contain colouring material such as wax or water paint. In Fig. II the frame contains a cavity a into which coloured liquid or fabric may be introduced by ducts b. Alternatively light-weight attachments whose colour can be readily changed may be fitted to the frames by clips.
Patent GB-607309-A (GB)
Title: Improvements in and relating to the production of sterols and their addition products from sterol-containing starting materials
Filed: 1945-11-29
Abstract: Sterols are separated from sterol containing materials, e.g cholesterol from wool grease forming a complex with a suitable salt and separating it from the mixture.  Suitable salts are organic or inorganic salts of the following metals: sodium, potassium, the alkaline earth metals, aluminium, manganese, iron, zinc, cadmium, cobalt, tin, chromium and nickel, the salt being capable of forming an addition compound with lower aliphatic alcohols or with mono- or polyhydroxy-phenols.  As the acid radical, there may be halides, nitrates, sulphates, acetates, succinates, benzoates, salicylates and sulphonates.  Good results are obtained using zinc or manganous chlorides.  In certain cases it is desirable that water should be added in addition to the water of crystallization.  After separation, the decomposition product may be decomposed by the addition of water or by short path, high vacuum distillation.  Detailed examples are given.
Patent GB-1184948-A (GB)
Title: Dithiophosphoric Esters and Insecticides containing these Compounds and methods of Controlling Insects or Spider Mites with these Compounds
IPC: C07F9/165
Filed: 1967-07-13
Abstract: 1,184,948. Insecticides containing dithiophosphoric acid esters. BADISCHE ANILIN-& SODA-FABRIK A.G. 13 July, 1967 [14 July, 1966], No. 32303/67. Heading A5E. [Also in Division C2] Pesticidal compositions comprise a compound of formula where R is methyl or ethyl, X is bromine or fluorine and n is I or 2, or X is chlorine and n is 2 or 3, together with conventional extenders, solvents, or emulsifiers. The compositions may be formulated as suspensions, solutions, emulsifiable concentrates, granulates or dusts and may contain other plant protection agents e.g. insecticides. Specifications 811,529 and 883,566 are referred to.
Patent GB-287620-A (GB)
Title: Improvements in or relating to variable-speed gears
IPC: H02K51/00
Filed: 1926-12-21
Abstract: 287,620. Zweigbergk, T. Dec. 21, 1926. Electromechanical power transmission systems. -In variable speed gears having an epicylic train with two elements, such as gun wheels, connected to two series-wound dynamo-electric machines, the field system or systems have a winding which is excited from an independent source, the object being to secure electrical stability. The machines may have a single field system as described in Specification 106,127, but when they have separate systems the independentlyexcited winding of either machine may be energized only when the machine is operating as a generator. A driving shaft 10, Fig. 1, carries or is coupled to an armature 11 which in turn is coupled to a shaft 12 carrying a sun wheel 13. Planet wheels 14 are mounted on a carrier 15 fast to the driven shaft 16, and a sun wheel 17 and an armature 19 are fixed on a sleeve 18. The field magnets have series windings 25, 28 and separately excited windings 24, 27. Starting with the shaft 16 at rest, the armature 19 rotates in the opposite direction to the shaft 10 and acts as a generator. As the speed of the armature 19 is gradually reduced, the shaft 16 is turned more rapidly. When the armature 19 is brought to rest, the shaft 16 is turning at about half engine speed. The armature 11 now acts as a generator and transmits energy to the armature 19 which is rotated in the same direction as the armature 11 and shaft 10. The speed of the shaft 16 is thus brought up to engine speed. The gearing may be used on a power-propelled vehicle having an electriclighting system, the separately excited windings being energized from the lighting system. An arrangement is shown in Fig. 2 in which a lever 29 which controls the position of the brushes 21, 22 on the commutator of the armature 11 controls also a switch carrying contact-plates 31, 32, 33 for bringing the coils 24, 27 into circuit with the dynamo 34 of the lighting set as desired. In the " off " position the dynamo 34 charges a battery 35. At slow speed it is brought into circuit with the winding 27, at medium speed into circuit with the winding 24, and at full speed connected again to the battery 35. At full speed the winding 24 is so connected that it becomes a shunt winding energized by the armature 11. Specification 21173/03, [Class 35, Dynamo-electric generators &c.], also is referred to.