baber/WOPTO huggingface dataset:
Patent GB-1330366-A (GB)
Title: Electron guns
IPC: H01J37/065
Filed: 1971-07-20
Abstract: 1330366 Electron guns COLUMBIA BROADCASTING SYSTEM Inc 20 July 1971 [12 Aug 1970] 33944/71 Heading H1D An electron gun for producing a focussed beam of electrons comprises filamentary cathode 10, an anode including a plurality of mutually insulated angularly spaced elongate segments 36, 38 (40, 42) (Figs. 3 and 5, not shown) having an opening for the passage of electrons and the anode further having a beam defining aperture 78<SP>1</SP> and a grid electrode 14. The construction enables the beam to be centred on the defining apertures, and preferably the segments are connected to ground for instance via 5M# resistors (Fig. 5, not shown) any segment intercepting the beam becoming negatively charged to deflect the beam. Alternatively, potentials may be applied to opposed segments. Cathode 10 and conductors 16, 18 in ceramic header 20 are preferably of W. Cylindrical grid 14 is secured to rectangular ceramic frame 24 secured by screws 26 preferably in metal pins 27. Grid 14 may be stainless steel and dimensions are given. The anode segments may be formed by drilling and slotting a Ti rod, e.g. 0À802 inch long and “ inch diameter screw holes (37a, 37b) being initially formed for attachment to ceramic spacers 60, 66 preferably boron nitride or anodized Al about Ti anode shield 46. Slot, bore and taper dimensions are disclosed, bore 70 being 0À005 inch diameter for example. Ti cup 72 includes portion 74 spaced 0À030 inch from the segments and Pt disc insert 78 with beam defining aperture 78<SP>1</SP>, (e.g. 10Á diameter) the insert being spot welded or held by a retaining member. Beam current may be 100 nanoamps through aperture 78<SP>1</SP>, 500 Áamps. being intercepted. Dimensions are given of filament 10, and grid 14, shield 46 extending 0À019 inch into grid 14. Conventional c.r.t., and electron beam recorders as in U.S. Patent Specification 3,116,962 are exemplified and the formation of an information pattern on an electron sensitive film medium for later reproduction by scanning with a flying spot scanner, is mentioned. The election beam recorder is for example, demountable, includes differentially pressurized chambers, a thermoplastic recording medium, and a cooling arrangement.
Patent GB-486874-A (GB)
Title: Improvements in movements for calendar watches
IPC: G04B19/24
Filed: 1936-12-10
Abstract: 486,874. Date indicators. AEBERHARDT, H. Dec. 10, 1936, Nos. 33965 and 33966. Convention dates, Dec. 17, 1935 and Feb. 12, 1936. [Class 106 (iv)] In a watch movement with date - indicating means, gear wheels and pinions only are used, to impart a continuous rotating movement to the day of the month index. The latter may be mounted concentrically upon the centre staff 1 or eccentrically thereof on a pivot 17 coaxial with the fastening screw 18 of the cook 19 of the time-setting mechanism. The cannon pinion 2 on the minute hand sleeve 3 drives the minute wheel 5 and its pinion 6 and thence hour wheel 8 on the hour hand sleeve 7. Pinion 6 also drives train 10, 11, 13, 14, and calendar wheel 15 which is concentric with centre pivot staff 1 and carries the day of the month index 35, Fig. 2. The calendar wheel may be coaxial with the intermediate wheel 16 of the time setting mechanism as shown at 15<1>, Fig. 1. The pivot of the seconds hand 40 is at 22. In a modification, Figs. 3 and 4 (not shown), only one wheel with its integral pinion is used between a pinion integral with the hour wheel 8 and a wheel 27 (not shown) which is eccentric of staff 1 and carries the day of the month index. The calendar mechanism may be housed in recesses in the movement plate.
Patent GB-499914-A (GB)
Title: Improvements in or relating to air filter units
IPC: B01D46/52
Filed: 1937-12-08
Abstract: 499,914. Air - filters. AMERICAN AIR FILTER CO., Inc. Dec. 8, 1937, No. 33979. [Class 8 (ii)] A festooned filter is held in position by interlocking frames M, W. The frame M comprises end plates 1 and side plates formed with fingers 3, two plates with intercalated fingers being provided on each side, the metal cut away to form the fingers being bent to form flanges thereon. Bars 6 joining the apices of opposed fingers act as supports to the filtering medium, which is held at the edges. between the flanges and corresponding flanges of fingers 13 of frame W. A woven wire screen support 16 for the filter is retained within the flanges of teeth 13 at the sides, and its ends are secured to the walls 11. Triangular frames 17 press the screen against the flanges and are welded to a base frame 15. Catches 19 lock the frames M, W together. The edges 20a, Fig. 6 of the filter medium may protrude and may form seals with an outer box enclosing the filter, which may be held in place by a, latch 26, Fig. 1, engaging a slot in the box.
Patent GB-632307-A (GB)
Title: Improvements in windings for electric motors and generators
IPC: H02K3/00
Filed: 1945-11-23
Abstract: 632,307. Windings for dynamo-electric machines. EURICH, J. E. G., and EURICH, J. V. Nov. 23, 1945, No. 34059/46. Divided out of 632,295. [Class 35] A ring winding is formed by coiling wire round a length of magnetic material which is subsequently bent round to annular form with a gap between the ends of the winding. The magnetic material may consist of a number of iron wires side-by-side with a wrapping of insulation upon which a single layer winding is wound, or the wire may be in several layers wound as in Fig. 3. The edges of the wire may be bare to provide a brush contact surface and the winding may be used in a motor or generator of the type described in Specification 632,295.
Patent GB-305121-A (GB)
Title: Improvements relating to the production of nitrate of ammonia
IPC: C01C1/18
Filed: 1928-11-20
Abstract: 305,121. Appareits et Evaporateurs Kestner. Jan. 31, 1928, [Convention date]. Right to Patent relinquished. Ammonium nitrate.-In preparing ammonium nitrate bv neutralizing nitric acid with ammonia, excessive heating is prevented by carrying out the reaction in presence of excess of ammonium nitrate, the solution being kept at a temperature below 35‹ C. A solution of ammonium nitrate is circulated from a tank 1 by a pump 4 through a cooler 5 and down a tower 2 packed with Raschig rings or provided with baffles, cascade devices &c. Nitric acid is added to the circulating liquid from a vessel 8, and ammonia is passed into the base of the tower from an inlet 10. Ammonium nitrate solution passes from the tank 1 through an overflow pipe 11.
Patent GB-325519-A (GB)
Title: Process for the manufacture of sulphur dyestuffs
IPC: C09B49/12
Filed: 1928-11-20
Abstract: 325,519. Carpmael, A., (I. G. Farbenindustrie Akt.-Ges.). Nov. 20, 1928. Addition to 315,910. Sulphuretted dyes.-The process of the parent Specification, according to which sulphuretted dyes are prepared by heating dinaphthylene dioxide with a sulphur halide, whereby halogen derivatives are produced on the first stage of the sulphurizing process, is modified in that halogendinaphthylenedioxides, which may be prepared according to Specification 324,017, are used directly as starting materials, and are heated with sulphur or subjected to the customary polysulphide fusion. According to examples, di-, tri-, tetra-, penta-, hexa- and deca-chlor- and also tetrabromdinaphthylenedioxide are treated with sulphur, alone or in the presence of sodium sulphide or a diluent such as trichlorbenzene. The products dye cotton yellowish-red to blackish brown shades. Tri-, penta, ad hexa-chlordinaphthylene dioxides are prepared by treating dinaphthylene, dioxide in trichlorbenzene solution with the calculated amount of chlorine at 190-200‹ C.
Patent GB-367018-A (GB)
Title: Improvements in and relating to steam superheaters
IPC: F22G1/00
Filed: 1930-11-13
Abstract: 367,018. Steam superheaters. AKT.- GES. BROWN, BOVERI, ET CIE, Baden, Switzerland. Nov. 13, 1930, No. 34228. Convention date, Dec. 16, 1929. [Class 123 (iii).] A superheater arranged in a chamber in which fuel is burnt under considerable pressure, consists of a number of flat wall-like nests of tubes 1 which divide the chamber into separate parallel passages. U-tubes are c o n - nected to the arms of a starshaped member 4 at the bottom of the combustion chamber. The passages between the walls formed by the U-tubes are provided with separate fuel injectors. The steam inlet 5 is connected to say two arms and, as shown, the steam outlet 6 is connected to a greater number of arms. The walls may be formed of horizontal tubes connected to a central vertical header and to a number of vertical headers arranged in a circle, the headers being provided with partitions directing the steam through the tubes in an upwards sinuous course.
Patent GB-485737-A (GB)
Title: Improvements in circuits for amplifying electrical oscillations
IPC: H03F1/07
Filed: 1937-12-13
Abstract: 485,737. Valve amplifying circuits; impedance networks. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Dec. 13, 1937, No. 34453. Convention date, Dec. 16, 1936. [Classes 40 (iii) and 40 (v)] The voltage supplied by an amplifier valve 1 of high internal resistance, e.g. a screen-grid valve or a pentode, to a load circuit, which may be a succeeding valve 4, is rendered substantially independent of the load impedance by a coupling comprising a network 3 having the property that its input impedance is inversely proportional to the load impedance. The notwork may have either of the forms shown in Figs. 2 and 3 and with the latter form the inductances L1, L2 may be included in the anode and grid supply circuits of valves 1, 4, respectively.
Patent GB-762195-A (GB)
Title: Bath for and method of producing a corrosion resistant coating upon light metals
IPC: C25D11/00
Filed: 1953-12-10
Abstract: 762,195. Electrolytic corrosion-resistant coatings on light metals. DOW CHEMICAL CO. Dec. 10, 1953 [Jan. 21, 1953], No. 34475/53. Class 41. A corrosion resistant anodic coating is formed on articles of magnesium or alloys containing at least 80 per cent magnesium by electrolysis in an aqueous bath at a temperature of at least 150‹ F. at a voltage suflicient to cause sparking at the surface of the article and for a time sufficient to give the surface of the article a green or tan colour, the bath having a pH of 0.2 to 4 and containing soluble ammonium compound giving a NH 4 , concentration of 3.2 to 15 per cent, soluble fluoride giving a F concentration of at least 6 per cent, soluble phosphate giving a PO 4  concentration of 2 to 10 per cent, soluble hexavalent chromium compound giving a Cr<SP>VI</SP> concentration of 0.3 to 5 per cent and soluble sodium salt giving a Na concentration of 0.3 to 5 per cent. A.C. or D.C. may be used and the articles prior to being anodically coated may be pickled in dilute nitric acid although pickling is largely unnecessary. The coated articles may be painted.
Patent GB-333123-A (GB)
Title: An improved device for altering the temperature error in induction electricity meters
IPC: G01R11/185
Filed: 1929-11-12
Abstract: 333,123. Landis et Gyr Soc. Anon. Jan. 9, 1929, [Convention date]. Electric and magnetic.-The brake segments 9 carry pieces 10 of nickel-copper or other alloy of which the permeability varies with temperature, thus forming a magnetic shunt with a central gap through which the spindle can be removed. The internal dimensions of the magnet 9 are sufficient to allow the disc 7 to pass through them, so that the rotor can be removed without removing the magnets.
Patent GB-1109699-A (GB)
Title: Tetrafluorohydrazine
Inventor: MARTIN KENNETH JOHN
IPC: C01B21/083
Filed: 1965-08-12
Abstract: Tetrafluorohydrazine, N2F4, is prepared by passing gaseous difluoramine, HNF2, through an acidic aqueous solution of an oxidizing agent. Temperatures of 0-100 DEG  C. may be employed. The solution is preferably made acid with H2SO4 to a pH of 1-2.  The oxidizing agent may be a ferric salt, e.g. FeCl3, a chromic salt, a ceric salt, e.g. Ce(SO4)3, KMnO4 or a chromate.  It may be used in an excess of up to 100 equ., and may where possible be regenerated with air or O2. The HNF2 may be mixed with an inert gas, e.g. N2, A, He, and may be dispersed as fine bubbles in the solution by means of a fritted plate, or be passed up through a packed tower containing the solution.
Patent GB-195159-A (GB)
Title: Improvements in or relating to crank shafts
IPC: F16C3/10
Filed: 1921-12-23
Abstract: 195,159. Ricardo, H. R. Dec. 23, 1921. Crank-shafts.-In built-up multi-throw crankshafts, particularly of the roller or ball-bearing type, webs B are shrunk on the hollow or other shaft portions A, and cylindrical pins E are secured in circular holes in the split web ends by tightening up bolts and nuts F. The big-ends or the ball or roller big-end bearings may bear on hardened bushes on the pins or direct on the hardened pins. The parts may be assembled by placing the hollow shaft portions A with their shrunk-on webs on a. tray bar, securing the pins E at one end and inserting them in the big-ends, then spacing the portions A as required, and finally securing the other pin ends.
Patent GB-917838-A (GB)
Title: Improvements in or relating to compound sheet materials
IPC: B32B27/00
Filed: 1958-10-29
Abstract: 917,838. Laminates. DANDRIDGE, G. F. J., and NEEDS Ltd. Oct. 28, 1959 [Oct. 29, 1958], No. 34662/58. Addition to 817,293. Class 140. [Also in Group XV] The invention of the parent Specification modified in that the films used are of thermoplastic synthetic material, at least one being of thermoplastic synthetic resin. Film materials referred to are cellulose acetate, polyethylene terephthalate-isophthalate, and vinyl polymers.
Patent GB-755860-A (GB)
Title: Improvements in or relating to electrical ceramics
IPC: C04B35/468
Filed: 1953-12-12
Abstract: A ceramic dielectric composition comprises a major amount of barium titanate and a minor amount of either tantalum or niobium compounds, preferably the oxide.  Specified proportions are 0.5 to 6 per cent. In addition other alkaline earth titanates, zirconates or stannates which form solid solutions with the barium titanate may be present. A mixture of the constituents is subjected to two successive prefirings before being fired at 1300 DEG -1400 DEG C.
Patent GB-448246-A (GB)
Title: Improvements in or relating to plastic compositions containing gelatinised nitrocellulose
IPC: B32B17/10
Filed: 1934-12-03
Abstract: Celluloid and like compositions containing nitrocellulose, particularly for the manufacture of sheets for laminated glass, contain polymerized methyl methacrylate and a plasticizer for both the latter and the nitrocellulose, the proportion of the methyl methacrylate polymer being 20--50 per cent that of the nitrocellulose; the proportion of plasticizer is conveniently equal to or somewhat less than that of the nitrocellulose, and the plasticizer is preferably a liquid lower di-alkyl phthalate, for example, di-n-butyl or di-n-amyl phthalate.  The ingredients, after preliminary kneading, are worked together on hot rolls; and gelatinization may be assisted by a small proportion of volatile solvent or partial solvent, such as acetone, ethyl acetate or alcohol.  The methyl methacrylate polymer may be prepared in the presence of the plasticizer, for example, with di-n-butyl or di-n-amyl phthalate with the aid of benzoyl peroxide.  The cr<\>zepe from the rolls may be blocked and sheeted, or it may be converted to sheets by hot pressing between polished plates, or it may be used directly for the manufacture of laminated glass. Specification 401,653 is referred to.
Patent GB-866160-A (GB)
Title: New colouration process for cellulosic textiles
Inventor: DENYER RONALD LEONARD
Filed: 1956-11-21
Abstract: Cellulosic textile materials, e.g., of cotton, linen or viscose rayon, are dyed or printed by applying an alkali, a water-soluble heterocyclic compound containing two -N=C (halogen)-groups in the ring and a dyestuff containing at least one reactive amino group (an amino group containing a hydrogen atom which is readily replaced by treatment with cyanuric chloride at 20 DEG C. in aqueous solution) and then heating or steaming.  The heterocyclic compound may be applied before, together with or after the dyestuff.  The alkali may be applied together with the heterocyclic compound in which case a mild alkali such as sodium bicarbonate is used.  If the alkali is applied as a separate step a stronger alkali such as caustic soda, sodium carbonate or sodium metasilicate may be used. Other specified alkalis are sodium borate and trisodium phosphate.  Various soluble and insoluble dyestuffs are specified.  Suitable heterocyclic compounds are the condensation products of a 2 : 4 : 6-trihalogeno-pyrimidine or a cyanuric halide with an equimolecular proportion of an amino, hydroxy or mercapto compound containing solubilizing groups, and many examples are given.  The heterocyclic compound may be coloured and may comprise the dyestuffs of Specifications 772,030, 774,925, 781,930, 785,120, 785,222, 805,562, 826,403, 838,335, and 838,338. The solutions, suspensions or pastes containing alkali, dyestuff and/or the heterocyclic compound may also contain migration inhibitors such as cellulose ethers, sodium chloride and sodium sulphate, solution acids such as urea or thiodiglycol, thickeners such as gum arabic, gum tragacanth, starch or sodium alginate and wetting agents.  When the dyestuff or heterocyclic compound contains metal-complex-forming groups, a treatment with a metal-yielding agent may be applied.  Examples of dyeing and printing are given.  Specifications 794,180, 822,047, 828,353, 829,042, 836,248, 837,035, 837,985, 838,307, 838,340, 838,341, 838,342, 838,343, 838,344, 838,345, 838,511, 844,869, and 857,124 also are referred to.
Patent GB-354136-A (GB)
Title: Improvements in door latch furniture
IPC: E05B3/00
Filed: 1930-11-20
Abstract: 354,136. Door-knobs. ROWLEY, W. L., 53, Allesley Street, Aston Road, Birmingham. Nov. 20, 1930, No. 34903. [Class 44.] A door-knob is screwed into position and retained by a U- shaped keeper 10 which is slipped into a recess 5 and secured by a rose. The inner edges of the keeper which grip the flats on the spindle are parallel or slightly inclined to one another.
Patent GB-173521-A (GB)
Title: Weighing scales
IPC: G01G19/00
Filed: 1921-12-29
Abstract: 173,521. Toledo Scale Co., (Assignee of Hem, H. 0.). Dec. 29, 1920, [Convention date]. Platform machines; relieving-mechanism; bearings; pendulum-weight apparatus.- In a portable platform weighing- machine means are provided for alternatively looking one or more of the supporting wheels positively and releasing the weighing mechanism or for unlocking said wheel or wheels and for locking said weighing meehanism, the weighing mechanism locking- means being arranged to be operable without releasing the wheel locking means. As shown in Fig. 12 the machine is mounted on wheels 2 and the levers of the platform 25 are coupled by a draw-rod 55 to a beam 53 which is in turn coupled by connections 50, 48 to pendulum mechanism 33 of the rolling- sector type. The pendulum mechanism is locked by hooks 75 engaging with projections 78. and the wheels 2 are locked by the engagement of pawls 92, 97 with notched wheels 95 secured to the wheels 2. During weighing operations, the wheels 2 are locked; when it is desired to move the apparatus, a handle on a shaft 85 is turned thus raising (a) a cross-head 88, rod 90, and the pawls 92, 97 to liberate the wheels 2, and (b) a rod 83 so as to rock a cam 81 on a shaft 82 thereby permitting the descent under spring action of a rod 79 and of rods 76 carrying the locking-hooks 75. In order to ensure the pendulums being in the locking position before the descent of the hooks, the cam 81 on its initial movement raises an arm 103, link 102, and beam lock 100 thereby raising the beam 53 and thus ensuring the collapse of the pendulums into the locking position. When the pendulums are unlocked the beam 53 may be independently locked without unlocking the wheels, by turning a handle 107. The indicating dial 29 may be faced in four different directions according to the manner in which the column 28 is assembled on its base the points of attachment of the rod 90 to the cross-head 88 and to the pawls 92, 97 being varied accordingly. The pendulum weight 36, Fig. 7, may be adjusted on its rod 35 by nuts 37, rotation of the weight being prevented by a screw 39 and slot 38. The pendulums are mounted on shafts 34, Fig. 9, bored at each end to receive conical pins 57 projecting through bars 59, Fig. 12 actuating the indicating pointer. The beam 53 carries a loading box 68 divided into three compartments as shown in Fig. 11, one compartment containing an adjustable weight 72. The two levers supporting the platform are connected in the manner shewn in Fig. 6 wherein each lever is provided with a tapered pin 62 cut away to a knife-edge. Plates 65 pivoted to bearing blocks 63 and each having one end extending over the adjacent bearing block, constitute a link connecting the knife-edged pins. The ends 64 of the blocks are bevelled to give point contact with the shoulders on the pins. The platform 25 is supported on each platform lever by links 20, Fig. 4, hanging from a pair of T-shaped brackets 18 rigidly connected by a rod 21 and supported on the knife-edges 1F, by means of pivoted bearings 17.
Patent GB-326514-A (GB)
Title: Improvements in or relating to clutches for screw or nut driving devices or the like
IPC: F16D47/00
Filed: 1928-09-13
Abstract: 326,514. White, A. E., (Independent Pneumatic Tool Co.). Sept. 13, 1928. Divided on 323,035. Bolts, nuts, and screws, screwing-up and unscrewing; yielding-drive attachments.-In portable power-driven machines or attachments for serewing-up or unscrewing nuts, screws, &c. the tool is driven by a shaft rotatably supported by a machine spindle and connected thereto by a yielding clutch whose teeth are engageable in a single position of rotative movement only and having means for separating the driving teeth completely when the clutch begins to slip. In an electrically driven machine the spindle 4 is rotated through reduction gearing in a casing 3 from the motor and supports the tool-shaft 12 slidably and rotatably in an axial bore. The shaft 12 has a clutch part 23 slidably keyed thereto by means of three sets of balls 24 kept in position by a washer 32 pressed upwards by a spring 31 which engages an adjustable abutment 33 on the shaft. The clutch part 23 is normally pressed by the spring 31 into engagement with an intermediate clutch part 16 attached to the shaft by balls 18 and having clutch teeth 17 on a clutch part 13 attached to the. spindle 4. A spring 37 in the bore of the spindle 4 normally maintains the clutch 13, 16 disengaged with the part 23 resting on a flanged part 42 of a casing 41 attached to the gear casing 3. The clutch teeth are bevelled so that the clutch 16, 23 may slip when the nut &c. is set, without disengaging the clutch 13, 16. The clutch part 16 has teeth 27, Figs. 3 and 4, on the outer periphery only and is provided with two arcuate recesses 55, 56 adapted to receive arcuate projections 59, 60, Figs. 5 and 7, on the clutch part 23. Each projection is included in the same angle but is situated at a different radius as shown and the height is slightly greater than that of the teeth 27, 29 When the teeth are engaged by the spring 31 the projections lie completely within the recesses, but when the teeth begin to slip, bevelled edges 62 on the projections and 61 in the recesses cause the clutch parts to ride apart with the teeth completely clear. The teeth remain separated for a whole revolution and then engage again momentarily only once in each revolution until the tool is removed from the work. For rotation in one direction only the recesses and projections are each bevelled at one end only and the other end is left square to provide a positive drive for unscrewing, but when yielding rotation in either direction is required, both ends are bevelled. The projections may be made integral with the part 23 or may be formed on a ring 68 let into a circular recess in the part and secured as bv rivets 69, and in each case are slightly shorter circumferentially than the recesses in order to allow the teeth 27, 29 to engage freely.