baber/WOPTO huggingface dataset:
Patent GB-587657-A (GB)
Title: Improvements in and relating to d.c. reversible motors supplied from a compound wound generator
IPC: H02P7/34
Filed: 1945-10-25
Abstract: 587,657. Control of D.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd., MAGGS, A. H., and CLARK, L. J. Oct. 25, 1945, No. 28200. [Class 38 (iii)] Varying E.M.F.-A constant-speed D.C. generator 1 (having a series field winding 2 and a shunt field winding 3) supplies a reversible motor 4 (having opposed series field windings 5 and 6) through a main reversing switch 8 bridged by resistors 11 and 12 of which the combined resistance in parallel is sufficient to prevent self excitation of the generator; the main switch 8 is closed selectively and alone for low-speed running in either direction, but for high-speed running the main switch 8 is closed simultaneously with an auxiliary switch 13 in the circuit of the shunt field winding 3. The switch 13 may be bridged by a resistance 14 having a value above the critical value for self excitation of the generator. A brakereleasing coil 7 is shown in series with the motor. The motor may drive the pitch-adjusting mechanism of a variable-pitch propeller for aircraft.
Patent GB-282094-A (GB)
Abstract: 282,094. Starke, H., and Schroeder, R. Dec. 11, 1926, [Convention date]. Electrostatic meters.-A flat hollow conductor b, Fig. 1, carried by a slidably mounted insulator d, is charged to a high voltage to be measured and produces a, weak electric field in a second similar conductor a, which field is measured by the rotation of a narrow rotatable L-shaped light metal vane e, Fig. 3, arranged in a small central opening in the plate a and held in the plane of the plate in zero position by the torsion of a stretched thread f. The rotation of the vane is measured by a pointer or by the movement of a spot of light reflected from a mirror attached to the vane. The instrument is calibrated with the plates a, b a short distance apart and with a relatively low voltage, for instance from 1,000 to 10,000 volts, which is measured by means of a standard electrometer or voltmeter. The measuring range for higher voltages is then obtained by increasing the distance between the plates a., h, or by inserting a metallic screen in the electric field between the plates a, b, until for instance 10,000 volts produces the same deflection as 1,000 volts during calibration. The scale value, at all points are then increased in the same proportion. The potential at a point close to conductor a may alternatively be measured by means of a test electrode, such as a flame electrode or dripping electrode, and a static volt meter instead of the movable vane.
Patent GB-408021-A (GB)
Title: Improvements relating to curtain hooks
IPC: A47H13/04
Filed: 1932-10-11
Abstract: 408,021. Hooks. HARRISON (BIRMINGHAM), Ltd., and HARRISON, S. C., Bradford Street, Birmingham. Oct. 11, 1932, No. 28291. [Class 89 (ii).] In curtain hooks of the threelimbed type having the rear limb b which passes through the loop of the heading tape bent inwardly and upwardly to form an intermediate limb c, this limb c is perforated to permit of its being attached to the tape by sewing. The rail is gripped between the front limb a of the hook and the limb c which lies in front of the loop and prevents wear of the tape. The perforations are formed in laterally extending lugs d on the limb c. Specifications 1510/01, [Class 89], 255,922, [Class 89 (ii)], and 351,244 are referred to.
Patent GB-778904-A (GB)
Title: Improvements relating to emulsions
Inventor: GILBERT ERIC DOUGLAS
IPC: C23G5/06
Filed: 1953-05-15
Abstract: An emulsion comprises an aromatic, halogenated aliphatic or halogenated aromatic hydrocarbon, or a mixture of such hydrocarbons, a mineral acid, water, and an anionic surface-active agent which has the formula RSO3H or RSO4H (R being an alkyl or aryl-alkyl radical) or is a salt of one of these acids and is preferentially soluble in water. The hydrocarbon may be benzene or trichlorethylene; the surfaceactive agent may be the sulphate "Teepol" (Registered Trade Mark); and the mineral acid may be phosphoric acid, which forms emulsions that can be used for de-scaling and de-greasing a metal surface while forming a phosphate coating thereon, sulphuric acid (suitable for de-greasing and pickling) or hydrochloric acid (suitable for cleaning painted surfaces).  The hydrocarbon may be the continuous phase, e.g. in a penetrating oil, but usually water is the continuous phase.  The emulsion may also contain a pickling inhibitor, e.g. thiourea, and may be made by making a first emulsion containing some acid and inverting this in an acid solution. Specification 778,903 is referred to.ALSO:An emulsion comprises an aromatic, halogenated aliphatic, or halogenated aromatic hydrocarbon, or a mixture of such hydrocarbons, a mineral acid, water and an anionic surface-active agent which has the formula RSO3H or RSO4H (R being an alkyl or aryl-alkyl radical) or is a salt of one of those acids, and which is preferentially soluble in water.  The hydrocarbon may be benzene or trichlorethylene; the surface-active agent may be "Teepol" (Registered Trade Mark); and the mineral acid may be phosphoric acid, which forms emulsions that can be used for descaling and degreasing a metal surface while forming a phosphate coating thereon, sulphuric acid (suitable for degreasing and pickling) or hydrochloric acid (suitable for cleaning painted surfaces).  The emulsion may also contain a pickling inhibitor, e.g. thiourea, and may be made by making a first emulsion containing some acid and inverting this in an acid solution. Specification 778,903 is referred to.
Patent GB-629057-A (GB)
Title: Improvements in or relating to electric immersion heaters for portable vessels
IPC: H05B3/78
Filed: 1947-10-24
Abstract: 629,057. Electric immersion heaters. WOLSELEY SHEEP SHEARING MACHINE CO., Ltd., MACNAMARA, H J., and BANKS, C. H. Oct. 24, 1947, No. 28428. '[Class 39(iii)] An electric immersion heater for a portable vessel, e.g. a bucket 5, comprises a vessel-suspending member 1 adapted to be attached to a fixture 3, an electric heating element 8 depending from the member 1, and means responsive to the liquid level in the bucket 5, e.g. a float 18, adapted automatically to switch off current to the element 8 when the liquid level falls dangerously. The member 1 consists of an inverted channel shaped bracket, the two sides each having hooks 4 from which the bucket 5 may be suspended, a platform 7 being disposed between the sides. A mercury switch 11 is retained in a holder- 12 rockably mounted at 13 to a bracket 14 screwed to the platform 7, the float 18 being connected by a rod 20 to the holder 12 or 21.
Patent GB-714864-A (GB)
Title: Improvements relating to percussion devices
IPC: B25D11/00
Filed: 1951-12-04
Abstract: 714,864. Percussive drills. PEARSON, D. M. Dec. 4, 1951 [Dec. 9, 1950; Nov. 15, 1951], No. 28435/51. Class 124 A portable percussive drill having a piston driven upwardly by an electric motor against an air cushion and downwardly by the air compressed has the downward force increased by the provision of a suction chamber in front of the piston. As shown, an electric motor 4 driving a pair of cams 11 which raise a piston 12 against an air cushion in a chamber 22, also drives an air pump 19 to introduce air into the chamber 22 to replace any loss. The required air pressure in the chamber 22 may be adjusted by a manually operated needle valve 25 which operates in conjunction with a bellows valve 27 and stabilizing chambers 30, 32. A non-return valve 37, preventing air from entering the chamber 40 in front of the piston, produces a vacuum in that chamber. A double acting compressor may replace the air pump 19 and a manually controlled valve may be used to vary the air pressure in the chamber, the pressure of one of the compressors also being controllable, Fig. 2 (not shown).
Patent GB-908100-A (GB)
Title: Improvements in or relating to signal receivers using transistors
Inventor: TSCHANNEN GOTTFRIED
IPC: G08B3/10
Filed: 1961-08-04
Abstract: 908,100. Transistor amplifier circuits; radio signalling. ALBISWERKE ZURICH A.G. Aug. 4, 1961, No. 28445/61. Classes 40 (5) and 40 (6). In the standby condition of a transistor amplifier the input stage is operated under class B conditions and a further stage is inoperative, whereas when a signal is received the input stage is switched to operate under class A conditions and the further stage is switched into operation. In the " personal call " receiver shown the line U sch  is normally at zero voltage so that the two input stages H 1 , H 2  succeeding the aerial circuit A are biased to operate under class B conditions while the further stages E are not energized. The receipt of a signal will cause a switch E to operate and so energize stages E and convert the input stages to class A operation. Under class B conditions the input impedance and the gain of the input stages is high but a starting pulse preceding the calling pulse code will cause the switch S to operate and the resulting change to class A conditions will broaden the band-width so that these pulses are not distorted. Frequency selective calling codes may alternatively be used in which case the circuit must be tuned to the first frequency of the code. The invention may also be applied to audio frequency stages.
Patent GB-1434920-A (GB)
Title: Mirror backing
IPC: G02B5/08
Filed: 1972-06-17
Abstract: 1434920 Mirrors F R PEGG 11 June 1973 [17 June 1972] 28461/72 Heading G2J A mirror 2 e.g. a convex security or safety mirror is provided with a backing 1 of glass-fibre reinforced plastics and which extends over the edges of the mirror to provide a frame 10. The backing 1 may be adhesively secured to the mirror 2 using an intermediate adhesively treated flexible sheet or foil 3. Reinforcement in the form of ribbing 41 and a fixing stud 5 may be provided.
Patent GB-252988-A (GB)
Title: Improved process of, and apparatus for the preheating of fuel preliminary to carbonisation
IPC: C10B1/04
Filed: 1925-11-12
Abstract: 252,988. Rude, J. Nov. 12, 1925. Cooling discharged materials. - Inert gas is circulated by fans g', m<1> through a fuel preheater a<2> and a hot-coke chamber t<1> which acts as a dry - coke quenching chamber and gas heater. Steam in small quantities may be admitted by pipe i<1>. Specification 244,337 is referred to.
Patent GB-243341-A (GB)
Title: Weaving process and loom for weaving fabrics which will not unravel
IPC: D04B39/06
Filed: 1925-11-12
Abstract: 243,341. Phily, F. Nov. 20, 1924, [Convention date]. Picking-motions.-In a loom wherein the warp threads 35 are formed into complete loops to receive the weft threads, by means of stationary guides 32 the weft yarn is suplied from bobbins 46, Fig. 2, and is inserted by a " shuttle " 48 comprising a rod with a hole at each end moving in the recesses 49 in the guides 32 and actuated by spring-controlled push pieces 67, Fig. 3, extending into channels 6 in shuttle boxes 64. The push pieces 67 are actuated by pivoted strikers 56, 50 controlled by springs 63 and by arms 62 on vertically movable rods 60 controlled by springe and by cams on shafts actuated from the main shaft 5, which has a hand wheel 7 and driving- pulley 6. The " shuttle " is held jammed in one of the channels 66 whilst the stitch is being formed, a tapered part and a spring catch being used for this purpose. The weft extends into a channel 70. Beat-up motions; reeds.-The reed 33 is carried on a T-shaped holder 34 secured to cam-controlled supports 13. The reed blades may be straight, curved or notched.
Patent GB-287196-A (GB)
Title: Improvements in method and apparatus for purifying water and for removing and preventing scale incrustations in boilers and the like
IPC: C02F1/48
Filed: 1926-11-12
Abstract: 287,196. Neeley, G. S., and Watkins, G. Nov. 12, 1926. Incrustation, preventing and removing. - Incrustation in boilers is prevented and removed by applying an alternating current to the feed water before its release into the boiler, and another current of different phase and voltage to the shell of the boiler and water therein. Water is supplied to a. boiler 10 by a feed pipe 15 and distributors 21 which are connected by wires 22 to insulated plugs 24 and thence through the primary 26 of a transformer to the supply mains 27. 'The entering feed water is thus subjected to electrolytic treatment by the alternating current. The transformer secondary 26a is connected to the boiler shell at 30 and to a point 32 which is comparatively cool. The feed water discharge member 20, Fig. 3, consists of two semi-cylindrical parts 20<a>, 34, bolted together and provided with insulating blocks 37 which support the feed pipe 21, and with cross pins 39 which prevent longitudinal movement of the electrode 21. In a modification, a precipitating vessel may be inserted in the feed pipe outside the below the boiler water level, and an outlet pipe the secondary circuit of a transformer. In another modification, earthing of the supply mains is avoided by connecting the two circuits of Fig. 1 to two transformer secondaries.
Patent GB-482600-A (GB)
Title: Improved means for indicating the electrolyte level in electric accumulators
IPC: H01M50/627
Filed: 1936-10-21
Abstract: 482,600. Batteries. CHLORIDE ELECTRICAL STORAGE CO., Ltd., and DEAN, H. Oct. 21, 1936, No. 28597. [Class 53] [Also in Group XVIII] The electrolyte level in an accumulator is indicated by a device made of white celluloid or other material having a surface which is readily distinguished when wet, the material extending downwards to different levels and being carried by the cover of the accumulator so as to be visible through the filling orifice. Fig. 1 shows a form in which a celluloid strip a is attached to the accumulator cover at c and slopes in a downward direction below the filling orifice b. Fig. 3 shows a modification in which a conical piece of celluloid d having a central aperture d<1> is suspended from the cover. A ring c may be provided to indicate the rnaximum height of electrolyte allowable. In the form shown in Fig. 5 a number of celluloid rings g having openings of increasing diameter are supported by the cover. In another form the indicator is in the form of a ring having a sloping upper surface which is visible through the filling opening of the accumulator.
Patent GB-206863-A (GB)
Title: Improvements in or relating to advertising devices
IPC: G09B29/10
Filed: 1923-11-13
Abstract: 206,863. Wolterbeek & Co., A. H., (Assignees of Seidel, A.). Nov. 13, 1922, [Convention data]. Maps. - In an illuminated device comprising panels a for the names of advertising firms, theatres, &c., panels b for information concerning these firms &c., a map or plan c, and switches l adjacent to the panels a, each switch is connected to a lamp behind the corresponding panel b and to a lamp for indicating the position of the advertising firm &c. on the map, and an additional lamp, indicating on the map the position of the operator, is switched on by pulling the winding cord e of clockwork f, and remains on until the running down of the clockwork opens the switch. The member i of the switch is normally lifted from the contact k by a cone h on the cord e and falls on the contact when the cord is pulled.
Patent GB-925495-A (GB)
Title: A process for preparing unsaturated nitriles
IPC: B01J23/16
Filed: 1961-08-08
Abstract: Bismuth tungstate is prepared by (1) adding to a solution of tungstic acid (H2WO4) in ammonium hydroxide a solution of bismuth nitrate in concentrated nitric acid or (2) mixing yellow tungstic acid to a paste with a solution of bismuth nitrate in nitric acid.  In both cases the product is dried at 120 DEG C. and then calcined to remove any ammonia and nitrates from the product. Specifications 709,337 and 912,795 are referred to.ALSO:In a process for preparing unsaturated nitriles, ammonia and an olefin are reacted together in the gaseous phase at a temperature of 300-700 DEG C. in the presence of a catalyst which contains only Bi and W, in chemical combination with oxygen.  The gaseous reactants are passed under a pressure of between 1 to 18 atmospheres (preferably 1-3 atm) over the catalyst which may be present in a fixed or fluidised bed and which is maintained at a temperature between 300 DEG C. and 700 DEG C., preferably 550-650, the flow rate of the gases being adjusted so that 1 unit vol. of gas is in contact with 1 unit vol. of catalyst for between 0.01 and 10 secs., preferably 0.05-2 secs.  The process may be operated continuously or intermittently.  The molar ratio of oxygen (generally in the form of air) to olefin in the feed to the reaction zone should preferably be in the range 0.5 : 1-3 : 1, more preferred ratios being 1 : 1-2 : 1.  When using pure oxygen it may be desirable to dilute the oxygen with a substantially inert gas, e.g. steam, paraffin hydrocarbon vapours, carbon dioxide or nitrogen.  The molar ratio of ammonia : olefin must preferably be at leat 0.05 : 1, there being no upper limit.  The reaction products are recovered by known methods. The catalyst present in the reaction is based on tungsten oxide promoted with bismuth oxide alone or supported on a carrier, e.g. alumina.  Preferably the catalyst must include Bi W O in such a proportion that it may be regarded as bismuth tungstate.  The effective proportion of the elements Bi and W present in the catalyst correspond generally in their limits to those represented by the various compounds of Bi3+ and BiO+ cations and one of the anions WO42-W7O246- W12O4110 - W12O408-W12O396-as well as other possible more complicated compounds.  When bismuth tungstate is used with a supporting material it is preferable to have the bismuth present in excess of the theoretical quantity necessary to form the true salt. Experiments I to IV describe how the catalyst may be prepared and further examples show the effectiveness of the catalyst in the preparation of acrylonitrile from propylene, NH3 and air (Table I) and also from propylene, NH3, air and steam (Table II).  Other suitable olefins are isobutylene which gives methacrylonitrile and those olefins derived from petroleum oil refining.  Specifications 709,337 and 912,795 are referred to.
Patent GB-808807-A (GB)
Title: Improvements in and relating to universal joints and couplings
Inventor: ISSIGONIS ALEXANDER ARNOLD
IPC: F16D3/28
Filed: 1954-10-05
Abstract: 808,807. Universal joints. MOULTON DEVELOPMENTS Ltd. Dec. 28, 1955 [Oct. 5, 1954], No. 28654/54. Class 80 (2). A Hooke's joint for motor cars &c. comprises a central spider having radially directed arms 2 to each of which is bonded a frusto-conical rubber bush 3 with its thickest portion lying radially outwards, an axially split two-part frusto-conical shell 5 surrounding each bush and being secured to yokes 15 on the connected shaft ends by bolts 19. The split frusto-conical shells 5 are bonded to the rubber bushes 3, which are compressed radially on to the spider arms 2. Holes 18 in the yokes 15 through which the bolts 19 are passed are arranged to be positioned radially inwards of bolt holes 12 in the shells 5 before the joint is assembled. When connecting the parts of the joint, the shells 5 are forced radially outwards by a suitable tool to line up the bolt holes 12, 18, and the bolts 19 are then inserted. Some radial compression of the rubber bushes 3 is thereby effected. On tightening the bolts 19, the two parts of each shell 5 are squeezed together and the bushes 3 are still further radially compressed.
Patent GB-948717-A (GB)
Title: Improved process for the recovery of glutamic acid
IPC: C12P13/14
Filed: 1962-07-25
Abstract: Glutamic acid is recovered from a fermentation medium by adding a water-soluble zinc salt, rapidly adjusting the pH of the mixture to form 5.9 to 6.5 with ammonium hydroxide while slowly agitating the mixture. The mixture is then filtered to separate the zinc glutamate. Glutamic acid is recovered from the zinc glutamate by slurrying with water and adding sodium hydroxide, preferably a 50% solution to a pH of 12.3.  The mixture is filtered and an acid added until a pH of about 3.2 is obtained and the precipitated glutamic acid removed and washed. Zinc chloride, sulphate, carbonate and nitrate are specified and the mixture is stirred at a low speed during addition.
Patent GB-408674-A (GB)
Title: A new or improved method of and apparatus for assembling and securing bracing members on tubular members constituting the spars of aircraft or other structures
IPC: B23P19/00
Filed: 1932-10-14
Abstract: 408,674. Making aircraft. VICKERS (AVIATION), Ltd., and WALLIS, B. N., Byfleet Road, Weybridge, Surrey. Oct. 14, 1932, No. 28701. [Classes 83 (ii), 83 (iii), and 83 (iv).] Drilling; riveting; work-holders; gauging- devices.-In assembling geodetic bracing members the axes of which meet at a point, a fitting at said point, and a tubular member with gusset plates, the fitting is held in position relative to the ends of the tubular member, and the bracing members are applied and their positions registered. Apparatus is described for assembling the geodetic bracing member a<4>, a<5>, a, a<1>, Fig. 1, the tubular member b, the fittings c, c<1> and the gusset plates b<1>, b<2> forming a section of the structure described in Specification, 388,438, [Group XXXIII]. The apparatus incorporates two headstocks e, e<1> as described in Specification 376,365 which are linearly and angularly adjustable with the aid of gauges and gauge faces such as l, l<1>, l<2> as described in that Specification. The plates c<4>, c<5> which form the connecting member c<1> and which have holes c<2> therein to receive a jointing pin c<3> in the completed structure are supported on a member g by studs g3, g<4> passing through the holes c<2>, and are clamped between distance pieces g<5>. A support g is provided above and below the guides d, d<1> carrying the headstocks e, e<1> and each is pivotally joined to arms i, i<1> pivoted at their other ends to a plate i<2>. Pivoted links i<3>, i<4> connect the plate i<2> and a carriage i<5> which is adjustable on supports i<9>, i<10> by nuts i<13>, i<14> on a screwed shaft i<12>. The arms i, i<4> have slotted quadrants i<6>, i<7> engaged by a securing bolt i8. After adjustment of the headstocks e, e<1>, and longitudinal adjustment of the carriages i<5> as determined by a gauge, the screwed plugs e<3> are brought flush with the face plates e<2>, Fig. 4, and a triangular gauge o is placed with points o<1>, o<2> centrally of the screwed plugs and so that the gauge can be swung about recesses at these points. The holder g is then swung on its arms in a vertical plane until the pointer o<3> intersects a gauge point g<2>. After removing the gauge o the holder g is swung about an axis passing through the point g<2> to a position indicated by a vernier scale on members g<7>, h<1> and is locked by a bolt g<8>. In operation, the tube b, Fig. 6, strengthening sleeves b<3>, and gusset plates b<1> are fixed in position and the plugs e3 screwed into the flanges b<4>. These members are then drilled and secured by temporary pins or permanently by riveting. The plates c', c<5> are then secured in the holders g, the bracing members are bent and twisted and brought into the required position between the members c, c<1> and b<1>, b2 and temporarily clamped, and these parts are drilled and secured temporarily. The method may be modified to employ fittings common to adjacent units.