baber/WOPTO huggingface dataset:
Patent GB-1277575-A (GB)
Title: Linear induction motor rail
Inventor: COLLING NORMAN WHITFIELD
IPC: H02K41/025
Filed: 1968-06-14
Abstract: 1277575 Linear motors TRACKED HOVERCRAFT Ltd 12 Sept 1969 [14 June 1968] 28379/68 Heading H2A A stationary reaction rail for a linear induction motor e.g. for propelling a tracked hovercraft is formed so that the resistivity of the rail varies along at least part of its length to give a progressively varying starting thrust. In one embodiment, Fig. 1B, an aluminium section A is joined to a manganese steel section S by a chamfered joint 14, the section S being followed by a further length of aluminium rail. Alternatively, Fig. 2, sections 23 of the rail equivalent in length to the wound moving member, are each formed of aluminium and manganese steel subsections 24, 25 the length of the manganese steel sub-sections being increased progressively along the rail. Fig. 4 shows another embodiment in which the rail is laminated and the proportion of manganese steel to aluminium is varied by substituting more manganese steel laminators for aluminium laminations progressively in sections along the rail. In a further embodiment, Fig. 5, the resistance of an aluminium rail 21 is varied by forming a progressively increasing number of holes 22 therein.
Patent GB-1434687-A (GB)
Title: Process for recovery of epsilon-carpolactam from a reaction mixture of epsilon-caprolactam and sulphuric acid
IPC: C01C1/242
Filed: 1974-06-26
Abstract: 1434687 Ammonium sulphate STAMICARBON BV 26 June 1974 [26 June 1973] 28392/74 Heading C1A [Also in Division C2] #-Caprolactam and ammonium sulphate crystals are recovered from a reaction mixture containing the lactam and H 2 SO 4  by neutralizing the mixture in a neutralization zone at 1-5 ats. absolute pressure with NH 3  in a circulating volume of saturated ammonium sulphate solution to simultaneously form (NH 4 ) 2 SO 4  crystals, separating the neutralized mixture into a lactam-rich aqueous layer and a suspension of ammonium sulphate crystals in ammonium sulphate solution, recovering the lactam-rich layer, separating the (NH 4 ) 2 SO 4  crystals from said suspension and recycling the mother liquor thus obtained to the neutralization zone, the heat of neutralization being removed by evaporation of H 2 O from the neutralized mixture.
Patent GB-721070-A (GB)
Title: Apparatus for turning bodies of revolution
IPC: B28B11/12
Filed: 1952-11-11
Abstract: 721,070. Turning pottery. SIEMENSSCHUCKERTWERKE AKT.-GES. Nov. 11, 1952 [Nov. 16, 1951], No. 28447/52. Class 87 (1). [Also in Group XXII] A rotary clay body 10 is shaped by a cutting tool 9 secured to a transversely movable carriage 8 mounted on a longitudinally movable carriage 11. Movement of the tool 9 is controlled by a rotary pin 4 driven by a motor 5 and co-operating with cam surfaces 2, 3 with which it is held in contact by a magnet coil 7 on the pin or on the template 1. The cam surfaces 2, 3 may be provided by apertures in the template so as to return the tool to its starting point.
Patent GB-949075-A (GB)
Title: Improvements in change-speed transmission systems particularly for agricultural tractors
Inventor: KERSEY ALBERT HENRY
IPC: F16H3/66
Filed: 1961-08-04
Abstract: 949,075. Change-speed gear. FORD MOTOR CO. Ltd. June 28, 1962 [Aug. 4, 1961], No. 28462/61. Heading F2D. Two simple planetary trains P, Q, Fig. 2, in series are driven through a mechanically controlled clutch 101, the input ring gear 104 of the first train meshing planet pinions 105 in turn meshing a sun gear 107 either stationed by engagement of an hydraulically controlled brake P<SP>11</SP> to give a step-down ratio drive to a planet carrier 106 or alternatively locked-up with the ring gear by engagement of an hydraulically-controlled clutch P<SP>1</SP> for direct drive of the planet carrier, a shaft 115 connecting the latter to the carrier 114 of the second train mounting planet pinions 113 meshing a sun gear 111 either stationed by engagement of an hydraulically controlled brake Q<SP>11</SP> to give a step-up ratio drive to an output ring gear 109 and a shaft 110, or alternatively locked-up with the ring gear by engagement of an hydraulically controlled clutch Q<SP>1</SP> for direct drive. The ratios of the two trains P, Q are so selected that an overdrive ratio, direct drive and two step-down ratios can be obtained. The shaft 110 drives a manually controlled change-speed gear 117 (not further described). According to the Provisional Specification, a further embodiment comprises the usual main clutch 3, Fig. 1, which drives through a gear train 1, 2, to a carrier 5 mounting planet clusters 8 . . . 11 meshing reaction sun gears 17, 16, 22 and a driven sun gear 12, torque passing from the latter to a manually-controlled change-speed gear 15. Three reduced ratios are obtained by selective engagement of band brakes B<SP>1</SP>, C<SP>1</SP>, D<SP>1</SP> to station the sun gears 17, 16, 22 respectively, and direct drive is obtained by engagement of a clutch F. The brakes B<SP>1</SP> &c. and the clutch F are hydraulically controlled, fluid under pressure being supplied thereto from a pump 26. Either the band brakes B<SP>1</SP>, D<SP>1</SP> and the clutch F are hydraulically engaged and spring disengaged, while the band brake C<SP>1</SP> is spring engaged and hydraulically disengaged, or one only of the other brakes and the clutch is spring-engaged, hydraulically disengaged. The arrangement is such that if the hydraulic system fails, a ratio is established mechanically in the planetary gearing.
Patent GB-1088967-A (GB)
Title: A multicolour level indicator
IPC: G01F23/292
Filed: 1966-06-24
Abstract: 1,088,967. Liquid level indicator. SOC. ANON. HERCULE. June 24, 1966 [June 24, 1965; July 22, 1965], No. 28532/66. Heading G1H. In a liquid level indicator with a multi-colour indication equipped with at least one window 1 of rectangular parallel piped form a longitudinal groove on the internal face of the window is formed as a dihedron 2, 3, the common edge of which is parallel to the longitudinal direction and at least one of the lateral faces of the window has a coloured coating 4. The coating 4 may be phosphorescent and heat resistant paint or enamel or a coloured material thermatically sealed transparent tubes containing a photo-laminescent substance and a small quantity of radioactive material may be located in a recess formed along one of the window lateral faces.
Patent GB-1066928-A (GB)
Title: Electroluminescence
IPC: B22D7/12
Filed: 1965-07-06
Abstract: A light-emissive cell comprises two electrodes, and a medium comprising an inert solvent, a fluorescent organic compound and a supporting electrolyte; upon passage of an alternating current, light emission occurs at the electrodes of a wavelength corresponding to the conversion of the fluorescent compounds to an oxidized or a reduced state.  Fluorescent compounds mentioned are: 1,4-dimethoxyanthracene; 1 - methoxy - 9,10 - diphenyl anthracene; 9,10 - diphenyl anthracene; 1,4 - dimethoxy-9,10 - diphenyl anthracene; 2,3 - benzofluoro-anthracene; anthracene; rubrene; pyrene; coronene; decacyclene; b -dinaphthalene oxide; 1,3 - diphenylisobenzofuran; 1,7 - phenanthroline; benzo - (1,2,3 - g,h: 4,5,6 - g1,h1) - diphenanthridine; N - methyl phenothiazine; perylene; 1,10-phenanthroline.  The inert solvent may be dimethyl formamide, 1,2-dimethoxy ethane, or dioxane containing up to 10% water, and may be a gel.  The electrolyte may have as anion: a perchlorate, a hexafluoroarsenate, a hexafluorophosphate, a chloride or a bromide ion, and as cation an alkali metal (e.g. lithium), an alkaline earth, or a tetraalkyl ammonium, e.g. tetrabutyl ammonium ion.  The electrode may be platinum, carbon, tantalum, mercury, or stainless steel. The cells may be tubular or cube-shaped, may contain many pairs of electrodes, each pair operating independently, may have the electrodes shaped or masked to represent characters &c. or may be coated with a fluorescent material.
Patent GB-468276-A (GB)
Title: Improvement in coke oven doors
IPC: C10B25/06
Filed: 1936-01-02
Abstract: 468,276. Coke-oven doors. WILPUTTE, L. N. Jan. 2, 1936, No. 28791. Convention date, Jan. 9, 1935. Divided out of 468,412. [Class 55 (i)] [Also in Group XVIII] The door frame member E of a coke oven is secured in place by clamps F which are held by bolts G in members d of the buckstays D. Each door frame is provided with adjustable flange portions e at its sides which abut a packing e<1> coacting with the edge of the flash plate C retained by the buck stay D. The door comprises vertical channel members H, and intermediate cross frame members H<1>, H<2>, H<3>, the members H<2> providing supports for pivot pins I<1> on which are mounted the door locking levers I which engage with latch hooks I<2> welded to the door frames E. The door frames are removed, after releasing the clamps F, by the usual door handling appliance together with the door.
Patent GB-1039157-A (GB)
Title: Improvements relating to machines for processing powdered materials
Inventor: JAMES ERIC ARNOLD
IPC: B02C13/18
Filed: 1964-07-13
Abstract: 1,39,157. Beater mills. THOMAS ROBINSON & SON Ltd. July 28, 1965 [July 13, 1964], No. 28810/64. Heading B2A. A machine for breaking up flakes, agglomerates and particles in powdered materials comprises a housing 1 having an inlet 2, a worm 9 for lifting the material from the inlet, helicallyarranged rotatable beaters 10 for propelling the material towards a tangential outlet at the top of the housing, and abutment rods 12 each having a flat surface and each being rotatable to vary the distance between the beaters and the junction between the flat and curved surfaces of the rod.
Patent GB-918932-A (GB)
Title: Transistor oscillators
Inventor: JONES JAMES DOUGLAS
IPC: H03B5/12
Filed: 1960-08-19
Abstract: 918,932. Transistor mixing and oscillating circuits. PYE Ltd. Aug. 15, 1961 [Aug. 19, 1960], No. 28816/60. Class 40 (6). In a transistor oscillator, the oscillation frequency is maintained constant with supply variations by connecting in series with the collector a resistor, the value of which is equal to the product of a resistor connected in series with the emitter, and the working gain of the transistor when biased to produce the desired output power from the oscillator. In a first embodiment, Fig. 1, the local oscillator of a television receiver operating on Bands I and III comprises a Colpitts circuit, the frequency of oscillation of which is determined by coil L1, which may be interchanged with others to cover channels 1-12. A channel 13 coil, L2, is always in circuit, and a fine-tuning capacitor C1 is connected to a tap on this coil. Frequency variations with supply voltage are minimized by adjusting R2, R3 to give the required output, and then making R4 equal to BR1, where B is the gain in grounded emitter configuration. Changes in frequency with ambient temperature are compensated by employing capacitors of the negative temperature coefficient type for either C2 or C3 or both. In a second embodiment, Fig. 2, a self-oscillating mixer has its input applied to the base of transistor T2 from aerial coil L10. The oscillator circuit comprises the resonant circuit L12, C15, C17, C18 back-coupled by means of a further coil L13. The I.F. output is taken from resonant circuit L14, C16. Frequency variations with supply voltage are minimized as before by adjusting R12, R13 to give the required output and making R14 equal to BR11. Specification 918,931 is referred to.
Patent GB-932489-A (GB)
Title: Process of dyeing fibres
IPC: D06P1/00
Filed: 1961-08-10
Abstract: Organic fibres or filaments, e.g. of polyamides, acrylic polymers, polyesters, cellulose acetate (including triacetate), natural and regenerated cellulose, silk and especially keratinous materials including human and animal hair, furs, feathers and wool, are dyed by treatment in the absence of nitrous acid or any salt thereof with an aqueous solution containing metal ions of one or more of the metals Co, Ni, Cu, Zn, Pd, Ag and Cd and with a dithio-oxamide.  The metals are preferably in the form of sulphates or chlorides.  The specified dithio-oxamides are of the formula <FORM:0932489/IV(a)/1> where R is hydrogen, alkyl, carboxyalkyl, aminoalkyl, sulphoalkyl, acetoalkyl, hydroxyalkyl, phenylalkyl, pyridylalkyl, phenylpyridyl, chlorophenyl, allyl, benzyl, furfuryl or pyridyl or are alkali metal or alkaline earth metal or ammonium salts of the carboxyalkyl and sulphoalkyl dithio-oxamides among which are, for example, dithio-oxamide, N,N1-dimethyl-dithio-oxamide, N,N1-bis(3-methoxypropyl) dithio-oxamide and N,N1-bis(2-sulphoethyl) dithio-oxamide dicalcium salt.  The metal ions and the dithio-oxamide may be applied simultaneously or in either sequence; when applied from the same solution a complexing agent may be included, e.g. thiourea or alkali metal salts of hydroxyethyl-ethylene diaminetetraacetic acid.  The concentration of both the metal salt and the dithio-oxamide solution may be from 0,00002 M up to a saturated solution, preferably 0,002 M, which solutions may also contain water-imiscible solvents, e.g. acetone and ethanol.  In the preferred method of dyeing keratinous fibres the fibres are first soaked in a metal ion solution at 20 DEG -95 DEG C. at a pH of 4-10 and then soaked in a dithio-oxamide solution.  Examples are given. Specification 521,648 is referred to.
Patent GB-911654-A (GB)
Title: Improvements in or relating to apparatus for the manufacture of hollow articles by dipping
Inventor: DAVIS FREDERICK LEWIS
IPC: B29C41/14
Filed: 1960-08-23
Abstract: 911,654. Moulding gloves by dipping. LONDON RUBBER CO. Ltd. Aug. 22, 1961 [Aug. 23, 1960], No. 29141/60. Class 87(2). Hollow articles, e.g. gloves and balloons are moulded by pivotally mounting format-carrying arms 21 on an endless driving chain 10 for movement in a plane transverse to the direction of motion of said chain 10, formers 24 being mounted for pivotal movement relative to the arms 21 about axes parallel to the pivot axes of the arms 21. The formers 24 are dipped into a tank 30 by allowing rollers 27 to move along rails 28 and a cam plate 29, raised to a horizontal position by either admitting fluid pressure to a cylinder 42 which operates parallel linkage 41 and moves a bar 38 against a cylindrical portion 25 of the former or engaging curved cam tracks against the cylindrical portions 25, and transferred to a fixed track 37 (see Fig. 3 not shown), by moving a carriage 46 and rotating belts 48, 49 to the dotted position so that the belts 48, 49 engage the cylindrical portions 25 and cause them to roll on to the track 37. The carriage 46 is coupled to the chain 10, during its travel in the same direction as the chain, by a latch 56 so that they move at the same speed. The formers may be returned to a vertical position by a similar device to that which raised them horizontally, or by helical tracks acting on the cylindrical portions 25 of the formers. To ensure the formers hang vertically for dipping, forked members 73 (see Fig. 7 not shown), are caused to press sub-arms 23 downwards. These members 73 are attached to the chain 10 by an arm 74 so that the frame 68 moves with the chain. If it is required not to dip some formers 24 into the tank 30 a gate 34 is positioned so that auxiliary rollers 32 are caused to run along a track 33.
Patent GB-873622-A (GB)
Title: Improvements in or relating to gas cooking appliances and ignition devices therefor
Inventor: HUGHES FRANCIS
IPC: F24C3/10
Filed: 1957-09-17
Abstract: 873,622. Igniting  burners. FLAVEL & CO. Ltd., SIDNEY. Sept. 17, 1958 [Sept. 17, 1957], No. 29194/57. Class 75(3). A gas cooking appliance comprises a tubular burner 2 having at each side a row of gas outlets 3 and a flash tube 12 leading from a pilot burner 6 to a lighting burner 9 projecting downwardly from the lower side of the tubular burner 2 and provided with three gas ports 10, 11, arranged so that gas from one port 11 passes into the flash tube, is ignited by the pilot burner 6 and.then ignites the gas from the other two ports 10 which,in turn ignite the tubular burner. The lighting burner 9 may be made integrally with the tubular burner but is preferably made separately and threaded into a hole in the tubular burner. The appliance is. also provided with hot plate burners located below a removable apertured spillage tray 4 and ignited by flash tubes secured to the underside of the spillage tray and radiating from a gas collecting hood 15 positioned adjacent the pilot burner 6. Am oven burner is ignited by a flash tube 13 extending downwardly from the pilot burner. Specification 782,435 is referred to.
Patent GB-1470241-A (GB)
Title: Photocells
IPC: H01L31/0224
Filed: 1974-07-02
Abstract: 1470241 Semi-conductor devices SOC ANON DE TELECOMMUNICATIONS 2 July 1974 [3 July 1973] 29210/74 Heading H1K A photo-cell comprises a semi-conductor material having a doped P region 7 extending to a first face thereof, a doped N region extending to a second face thereof, and electrodes 6, 9 attached to the first and second faces respectively, the front electrode 9 being in the form of a grid and the N region including a N<SP>+</SP> region 8 under the electrode 9 and corresponding therewith and a thinner (in the direction perpendicular to the second face) N- region 10 in the spacings of the grid of the N<SP>+</SP> region 8. The N<SP>+</SP> and N<SP>-</SP> regions 8, 10 are about 0À5 and less than 0À1 microns thick respectively and their imparity concentrations are about 10<SP>21</SP> cm.<SP>-3</SP> and less than about 10<SP>19</SP> cm.<SP>-3</SP> respectively. The semi-conductor may be silicon.
Patent GB-1014515-A (GB)
Title: Improvements in or relating to the manufacture of flat glass
Inventor: LOUKES DAVID GORDON
IPC: C03B18/18
Filed: 1962-07-30
Abstract: In the manufacture of flat glass during which the glass is in contact with molten metal, there is maintained within the molten metal at least a trace of an element with which an impurity in the metal preferentially reacts.  Preferably a ribbon of glass is supported on a bath of molten tin or tin alloy covered by a plenum of a protective atmosphere.  There is incorporated in the molten metal a trace of an element selected from lithium, sodium, potassium, magnesium, calcium, barium, aluminium, indium, titanium, vanadium, chromium, manganese, iron, zinc, zirconium, niobium, carbon and silicon.  Preferably a concentration of 50 p.p.m. of sodium as a sodium/tin alloy or 10 p.p.m. of magnesium of a magnesium/tin alloy is used and is sufficient to ensure that any impurity such as oxygen and/or sulphur always reacts, and also forms a means for controlling migration of tin into the underface of the glass ribbon.  The titanium, vanadium, chromium, niobium, zirconium or silicon, which are insoluble in the bath, may be used as grids immersed in the bath, the oxygen or sulphur reaction product forming on the grid, which may be removed and cleaned.  A ribbon of glass formed in this way has a "fire-finished" quality.
Patent GB-211914-A (GB)
Title: Improvements in foresights for small-arms
IPC: F41G1/42
Filed: 1922-10-27
Abstract: 211,914. Grant, W. Oct. 27, 1922. Sights.-An open-ring foresight has an internal diameter substantially greater than the external diameter of the barrel and an external diameter such that, when the foresight is viewed through an aperture backsight, an annulus of light appears round the edge of the ring. The ring is combined with a central sighting-member such as a blade, ring, &c., in such manner that one or more openings surround the central sighting- member. As shown in Figs. 1 and 2, the sight comprises a ring A carried by a tube B which also carries a central ring sight by radial arms D. The tube B is adapted to fit on an existing foresight guard. Fig. 7 shows a modification in which a ring A<1> surrounding a blade sight D is removably attached to the foresight block P by a -screw Q.
Patent GB-159323-A (GB)
Title: Improvements in carburettors
IPC: F02M19/10
Filed: 1919-11-26
Abstract: 159,323. Kings, T. W. Nov. 26, 1919. Spray carburettors.-Two Venturi tubes are provided, both of which are divided transversely at their smallest diameters to form adjustable fuel and mixture orifices respectively. The primary Venturi tube 19 is disposed in a tube 17 passing vertically and axially through the float chamber 13. The float chamber is mounted upon an exhaust-heated jacket 3 through which passes the secondary Venturi tube 1, 34, which forms the main air tube. An annular fuel space 18 is formed between the tube 17 and the primary Venturi tube, and communicates with the float chamber by ports 16 and, at a higher level, with the Venturi tube by the gap 15 between the two portions of the tube. The upper portion 22, which is open to the atmosphere, is adjustable by hand relatively to the lower part 21 to regulate the fuel opening 15. The mixture passes to a chamber 32<1> around the aperture 35 existing between the two portions of the secondary Venturi tube. The opening 35 is adjusted by sliding the casing 3 on bearings 4, 8 on the expansion portion 1 of the secondary Venturi tube, the spacing being maintained by collars 5 inserted between flanges 6, 7 or. the relatively movable parts.
Patent GB-173910-A (GB)
Title: A secure window fastener
IPC: E05B65/08
Filed: 1920-10-20
Abstract: 173,910. Laban, J. T. M. Oct. 20, 1920. Sliding bolts.-The bolt a<6> of a windowfastener, working in a hole d<1> in the top rail of the lower sash and engaging a hole e<1> in the bottom rail of the upper sash, is secured in the shot position by rotating the bolt so that the slotted plate b lies between an integral lug a<1> on the reduced portion a<4> of the bolt and a collar a<2>. The bolt may be case-hardened.
Patent GB-978413-A (GB)
Title: Electric switch
IPC: H01F21/04
Filed: 1961-04-05
Abstract: 978,413. Mechanical switches, without quick action. P. R. MALLORY & CO. Inc. April 5, 1961 [April 26, 1960], No. 29648/64. Divided out of 977,331. Heading H2B. A slider switch comprises a board 14 carrying printed circuit contacts 60 arranged to be selectively interconnected by a number of springy contact arms 63 on a rectangular insulating plate 52 slidable with respect to the board 14 by a fork 65 on a rotary shaft 50 engaging with a pin 67 on the plate 52. The board 14 is mounted in the tuning assembly of the main Specification by plug-and-socket connectors 33, 15 and 33a, 30 and is dismountable from the tuner and therefore from the operating members 65, 50. The shaft 50 is provided with an indexing mechanism (Fig. 4, not shown).
Patent GB-1298946-A (GB)
Title: Electrical switches
Inventor: LEWIS KEITH
IPC: H01H13/12
Filed: 1969-06-12
Abstract: 1298946 Retractive switches JOSEPH LUCAS (INDUSTRIES) Ltd 19 May 1970 [12 June 1969] 29754/69 Heading H1N A rectilinearly slidable operating member 16, Fig. 2, of an electric switch has a pair of spaced bridging contacts 23, 24 extending transversely between its sides for engagement by opposite pairs of spring blades 18a, 19a and (21a), (22a), Fig. 3 (not shown). The operating member 16 is slidable in a cover 14 snapped on to the switch casing 11 and having an apertured lug 15 for attachment to a panel. A retractive spring 17 is arranged between a recess 13 in the casing 11 and the end of the operating member 16. The spring blades may be integral with terminals 18, 19 which are bent over to double-thickness for rigid mounting in the casing 11. In a modification one terminal of each pair may be grounded by bending back outside the casing for engagement by a rivet &c. in the lug 15. The operating member 16 may also be surrounded by a sealing washer to prevent ingress of dirt.