baber/WOPTO huggingface dataset:
Patent GB-218352-A (GB)
Title: Improvements in and relating to electric rotary converters
IPC: H02K47/08
Filed: 1923-12-03
Abstract: 218,352. Smith, S. P., and General Electric Co., Ltd. Dec. 3, 1923. Rotary converters and transformers.-A rotary converter or like machine, such as a doublecurrent generator, has a symmetrical lap-connected winding on the armature, an odd number of slots per pole-pair, and an odd number of sliprings connected to the winding and supplied with polyphase current, the essential condition being that the number of slots per pole-pair is an exact multiple of the number of phases or slip-rings. A symmetrical 9-phase current may be obtained by an arrangement of the windings on a 3-phase transformer, with or without the use of an additional transformer. Fig. 2 shows a transformer in which each of the three limbs of the starconnected secondary winding has four coils, 9-phase current being obtained from the terminals 1 - - 9. Fig. 4 shows a connection for use when two transformers A are used, C representing the armature of the rotary converter.
Patent GB-1092476-A (GB)
Title: Catalytic conversion of carbon-containing compounds
Inventor: REID LUTHER JAMES
IPC: G01P3/26
Filed: 1965-02-11
Abstract: Hydrocarbons are cracked under suitable conditions in the presence of a catalyst comprising particles of Ru, Rh, Os, Ir, Pt, Pd, Cu Cr2O4 or a crystalline metal aluminosilicate as a catalytically active ingredient located in the pores of particles of a base material inactive relative thereto for organic compound conversion, the base particles having a minimum diameter of 2 mm. and having pores at least 50% of which are greater than 50m  in diameter, the active ingredient particles being less than 50m  in diameter, the weight of active ingredient so located being at least 0.5% of the weight of base. Examples describe the cracking of a gas oil using a rare earth exchanged zeolite loaded into SiO2-Al2O3.ALSO:A catalyst comprises macroporous base particles having a minimum diameter of 2 mms. and having at least 50% of the pores of a diameter greater than 50m  and finely divided particles of Ru, Rh, Os, Ir, Pt, Pd, CuCr2O4 or a zeolite smaller than 50m  in diameter and comprising at least 0.5% by weight of the base particles.  The zeolite may be loaded with R.E. metal ions. The base particles may be SiO2-Al2O3, SiO2, Al2O3, MgAl2O4, ZrO2, TiO2 or Zr SiO4.  Both catalyst constituents may be loaded onto a non porous cores.
Patent GB-949656-A (GB)
Title: Adjustment device for variable throw crank mechanism
IPC: B21D43/09
Filed: 1962-02-16
Abstract: 949,656. Metal strip feeds. F. L. LITTELL MACHINE CO. Feb. 16, 1962 [April 25, 1961], No. 6149/62. Heading B3W. [Also in Division F2] In a press for cutting or punching strip wherein a plunger (not shown) is reciprocated by the shaft of a rotary plate 65, Fig. 1, in timed relation with the intermittent rotation of intergeared feed rolls such as 23, 24, the rolls are driven, as in Specification 794,943, through a one-way clutch and bevel gearing, by a rack 35 which is reciprocated by a crank-pin 72 on the plate 65. The pin 72, Fig. 4, has a dovetail mounting in a diametral groove in the plate 65 so that it is adjustable across the face of the plate by a screw 67 to vary the crank throw when the drive is stopped. In order that the effective crank throw, and hence the speed of the rolls 23, 24, may also be remotely varied by a hand wheel 36 during drive, the rack 35 is secured to a housing 87 engaging a bearing 88 on an eccentric bush 83 on the pin 72, the eccentric bush 83 being angularly adjusted on the pin 72 during drive by mechanism (see Division F2) including an axiallymovable internally - toothed gear 105 engaging helical gears 77, 84 of opposite slope respectively fast with the pin 72 and eccentric bush 83.
Patent GB-496746-A (GB)
Title: Method of producing paper products, cardboard, pressed cardboard, or the like products impregnated within the mass with bitumen
IPC: D21H17/66
Filed: 1937-03-05
Abstract: 496,746. Paper, cardboard, &c. containing bitumen. M-B-C EMULSION CO. AKTIESELSKAB. March 2, 1937, Nos. 6153 and 6158. Void. Convention dates, March 5, 1936 and Nov. 7, 1936. [Class 96] In the manufacture of paper, cardboard, &c. fibrous pulp mixed with a bituminous emulsion is deposited on a wire-cloth &c. and the bitumen coagulated as by spraying with alum or by compressing the pulp on the wire-cloth or press felt. Two or more such wet pulp webs from cylinder machines may be united.
Patent GB-446036-A (GB)
Title: Improvements in or relating to percussive tools actuated by compressed air
IPC: B25D9/14
Filed: 1935-02-26
Abstract: 446,036. Percussive tools. HILLIGWEG, A., 25, Bachstrasse, Sprockh÷vel, Germany. Feb. 26, 1935, Nos. 6176 and 6177. Convention dates, March 1, 1934 and June 14, 1934. [Class 124] [See also Group XXVI] In a compressed-air-actuated percussive tool, excess cylinder pressure on the return of the piston is prevented by fluid escaping by a passage 5 at the rear of the cylinder which is controlled by a valve 7 loaded to open when the cylinder pressure is equal to or less than the supply pressure. The valve is acted upon by compressed-air or by a spring and allows the fluid to pass to the atmosphere or to the fluid supply. A similar valve 8 may be arranged in connection with the forward cylinder end. The tubular distributing valve 4 is arranged coaxially of the cylinder, and has an annular area beneath the upper head constantly subject to fluid-pressure. An annular groove 26 therein controls the forward admission, and the rear of the valve, the back admission. The central exhaust 32 is controlled by the piston. When the piston moving forwardly passes the port 32, the pressure on the face 33 is released, and the valve is reversed. When the exhaust is closed on the upstroke, the compression reverses the valve. In a modification, the relief valve is arranged parallel to the cylinder, and is acted upon by a spring the tension of which may be adjusted by a screwed enclosure cap. The cylinder ends have separate, piston-controlled, exhaust ports.
Patent GB-1070902-A (GB)
Title: Improvements in or relating to non-metallic magnetic materials
Inventor: MARTIN GERALD
IPC: H01F41/02
Filed: 1963-02-15
Abstract: 1,070,902. Magnetic structures. PLESSEYUK Ltd. Feb. 12, 1964 [Feb. 15, 1963], No. 6203/63. Heading H1H. Sintered magnetic bodies are produced by extruding through a die in which there is a direct continuous or pulsed magnetic field a mixture of magnetic particles and a binder, then applying a second, reverse, magnetic field in the die to demagnetize the body before it leaves the extruder, and then cutting the extruded product as required, and sintering. Both magnetic fields may be produced by the same magnetic circuit, and the second is smaller than the first. A suitable material is barium ferrite (prepared e.g. by calcining at 1300‹ C. a mixture of BaCO 3  and Fe 2 O 3  containing a little SiO 2  and PbO) in cereal flour and methyl cellulose. The fields may be in any direction, and the first is at least 3000 Oersted, and preferably 6000 Oersted, and the second 2000 Oersted. The properties of a magnet made in this way were: B rem  = 2800 Gauss; Hc = 2200 Oersted; B.H max = 1À7 x 10<SP>6</SP> Gauss. Oersted.
Patent GB-286456-A (GB)
Title: Improvements in the process of obtaining high grade products from raw coal
IPC: B03B9/00
Filed: 1927-03-05
Abstract: 286,456. Chemische Fabric in Billwarder vorm. Hell & Sthamer Akt.- Ges., and K³hlwein, F. L. March 5, 1927. Wet separating; washing-apparatus with screens.-Impure coal, coal sludge, or coal-containing residues are treated for the separation of a high-grade coal from clay &c. in a weak alkaline or alkaline earth solution of a xanthate in substantial absence of frothing or flotation agents. In the plant shown the material to be treated is fed through a hopper 2 to a worm or the like 1 to which a mixture of xanthate and soda solution is admitted from a pipe 3. The deslimed material is delivered through a shoot 10 to a sieve 11 where it is washed by a spray 12, the purified product being discharged at 13. Material passing through the sieve 11 is led by a trough 15 to a sieve 5 to which also the fine slime from the worm 1 is led, and on which the materials are washed by a spray 6. The separated materials are discharged at 8, 16. The sieves 5, 11 are formed with slits instead of wire mesh, and they may be shaken or provided with rakes or stirrers.
Patent GB-525823-A (GB)
Title: Improvements in or relating to admission ports to the cylinders of two-stroke internal combustion engines
IPC: F02B25/12
Filed: 1939-02-25
Abstract: 525,823. Cylinder admission ports. WORKS DEVELOPMENT CO., Ltd., and EHRLICH, J. Feb. 25, 1939, No. 6316. [Class 7 (ii)] A V-notched piston edge 1, or V-notched leading edge to the admission port 5, promotes the smooth flow of the gases entering from the transfer passage of an engine using crank-case compression and having parallel cylinders with a common combustion head.
Patent GB-914658-A (GB)
Title: Improvements in or relating to intermeshing screw pumps
IPC: F04C2/16
Filed: 1960-02-23
Abstract: 914,658. Intermeshing screw pumps. IMOINDUSTRI A.B. Feb. 23, 1960 [Feb. 23, 1959], No. 6366/60. Class 110 (2). In an intermeshing screw pump comprising, for example, a central driven rotor meshing with two end rotors, the central rotor or its associated casing bore, see Fig. 4 (not shown), is provided with two symmetrical part-circumferential grooves 14 for sealing purposes. In a modification, Fig. 5, the casing is provided with a groove 35 in the bores of the middle screw. Specification 909,922 is referred to.
Patent GB-538350-A (GB)
Title: Improvements in and relating to the manufacture of sodium citrate penta-hydrate
IPC: C07C51/43
Filed: 1940-04-09
Abstract: 538,350. Sodium citrate. CALIFORNIA FRUIT GROWERS EXCHANGE. April 9, 1940, No. 6401. Convention date, April 10, 1939. [Class 2 (iii)] Sodium citrate pentahydrate is prepared by crystallization from an aqueous solution at or below 46‹C. The evaporation of the solution is preferably effected at a pressure less than 2.6 inches of mercury. The temperature during the evaporation need not be kept within the range stated so long as the actual crystallization is effected within that range.
Patent GB-222765-A (GB)
Title: Improvements relating to vaporizing devices for internal combustion engines
IPC: F02N19/04
Filed: 1924-03-13
Abstract: 222,765. Fornaca, G. March 13, 1924. Vaporizers, external.-To control the heating of the mixture supplied to an engine 1 from a carburettor 2, the inlet pipe is in two portions 3, 3<a>, which unite at both ends. the portion 3 being nearly wholly and the part 3<a> only in part surrounded by exhaust gases in a casing 6. A valve 8 determines whether the mixture flows through either portion or through both. In a modification, the valve 8 is actuated by a device near the inlet valve 5 and subjected to the pressure and temperature of the mixture.
Patent GB-833709-A (GB)
Title: Stems for smokers' pipes and cigar and cigarette holders
IPC: A24F7/04
Filed: 1957-02-26
Abstract: 833,709. Tobacco pipes; cigar and cigarette holders. KEYSER, P. E. Feb. 21, 1958 [Feb. 26, 1957], No. 0481/57. Class 130. The pipe &c. stem has a chamber 19, Figs. 1 and 2, open at one side for entry of a cottonwool filter plug 25 and closable by rotation of a slotted, or axial sliding of a plain, sleeve 22. Alternatively the sleeve 22 may slide and rotate. The chamber 19 may be integral with the mouthpiece 15 or of nylon and spigotted into a vulcanite mouthpiece. In a cigarette holder, the plug 25 tightly fills the chamber 19, but in a pipe a by-pass space is left above the plug as shown. A holder according to the invention may incorporate a cigar or cigarette ejector. The Provisional Specification (shown here as Fig. 3), shows a nylon &c. member 7 containing a bore 8 for a filter plug and insertable into a chamber 6 having an open or closed bottom and formed in a nylon &c. element 1, having one end 3 shaped to receive a cigarette or a pipe stem or to enter a pipe bowl, and the other end 4 formed as or receiving a mouthpiece. The member 7 may be of various shapes, e.g. rounded or tapering, or have a lip, and the plug may be of cottonwool or crepe paper or be replaced by a cartridge containing crystals or by a moisture trap. By-pass ducts around the plug may be provided in the element 1 and/or the member 7 along one or both sides of the member 7, or may be provided in the member 7 in the form of holes above the bore 8 or grooves in the top thereof. Alternative forms of the member 7 incorporate (1) a side opening for plug &c. insertion, (2) central or off-set pivoted connections to the element 1, and/or (3) a peep hole for plug observation. An axially-sliding or rotary closure sleeve spring-urged to closed position is described.
Patent GB-308716-A (GB)
Title: Improvements in high frequency signalling systems
IPC: H03F1/08
Filed: 1929-02-28
Abstract: 308,716. British Thomson-Houston Co., Ltd., (Assignees of Byrnes, I. F.). March 27, 1928, [Convention date]. Thermionic generators and amplifiers.-Variations in the impedance of the aerial or output circuit, liable to affect the frequency of the generated oscillations, are compensated by means of an amplifying tube having an additional electrode which is maintained at a positive potential. The Figure shows an oscillation-generator 1 backcoupled through an oscillatory circuit 10, and coupled to an amplifier tape 2 through a condenser 12. An additional screening-electrode 16 in the amplifier is connected through a resistance 25 to the positive side of the high-tension source 20. A similar electrode 8 may be similarly connected to the same source through a resistance 24. Any variation in the output circuit 3 tending to charge the effective impedance of the amplifier 2 or oscillator 1, and therefore the frequency of the main oscillatory circuit 10, is counterbalanced by compensating potentials automatically applied by the resistances 25, 24 to the additional electrodes 16, 8. The filaments of both tubes are fed from an AC source 17. Interrupted CW signalling is effected by means of a chopper 23 and key 21. By closing the switch 28 to short-circuit the chopper, ordinary CW is radiated under control of the key 21. Specification 187,233 is referred to.
Patent GB-1434681-A (GB)
Title: Spring-loaded mechanical seal with torque control
IPC: F16J15/38
Filed: 1974-02-13
Abstract: 1434681 Mechanical seals BOKG-WARNER CORP 13 Feb 1974 [23 March 1973] 6609/74 Heading F2B In an end face seal for a rotary shaft 14, excessive friction between sealing faces 58 and 59 is prevented by means responsive to the torque in either direction between them to provide an axial force, in opposition to the resilient pressure exerted on the faces by springs 42. Axial slots 63, 64 (63<SP>1</SP>, 64<SP>1</SP>) in ring 35 are tapered and engaged by cam bars 65 (65<SP>1</SP>) on ring 44 so that the torque transmitted by them between the shaft and ring 49 has an axial component tending to bring rings 35 and 44 together. Rings 44 and 49 may be interconnected at 53, 54 to permit axial play or, alternatively, they may be formed as a single ring (49<SP>111</SP>, Fig. 7, not shown).
Patent GB-654225-A (GB)
IPC: B60L15/12
Filed: 1948-03-04
Abstract: 654,225. Control of D.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd., and BUTLER, F. E. March 4, 1946, No. 6655/48. [Class 38 (iii)]  A control circuit for a direct-current motor, having an armature A, series field winding B, and auxiliary shunt field winding C, includes a plurality of series starting resistors which are adapted to be shortcircuited in turn to accelerate the motor in stages. A contactor 7 is connected in series in the shunt field circuit and is adapted to be opened after the last resistor has been short-circuited to achieve further acceleration of the motor as the shunt excitation decreases. A time-delay relay coil 9c is connected in parallel with the shunt field and is adapted to open its normally-closed armature contacts when the shunt field is energized to prevent the closing of a contact 9 in series with resistor R6, which is placed across the field winding B, the time-delay being sufficient to keep the armature contacts open until the voltage across the shunt field winding has been reduced substantially to zero. Closure of contact 10 completes the full accelerating sequence. The short-circuiting of the series starting resistors may be effected by current limit relays having coils connected across certain of the resistors. Dynamic braking is instituted by the closing of a contact 6.
Patent GB-525835-A (GB)
Title: Improvements in and relating to gas blast electric switches
IPC: H01H33/76
Filed: 1939-03-01
Abstract: 525,835. Gas-blast switches. BRITISH THOMSON-HOUSTON CO., Ltd. March 1, 1939, No. 6736. Convention date, March 1, 1938. [Class 38 (v)] The closure-member 7 of an extinguishing chamber has channels 8 .. 10 leading to the central aperture in which the hollow movable contact 3 passes, the channels cooperating with lateral openings 4 .. 6 in the contact 3, whereby, when the circuit is broken, intermittent building-up and reduction of pressure occurs in the chamber and the are is extinguished. Extending between the fixed contact 2 and member 7 is a tube 11 of fibre, carbamide resin, or other material evolving gas under the heat of the arc. A filling-pin 12 which may be of similar material, is also provided. When the contact 3 is withdrawn, pressure is built up until the opening 6 reaches the channel 8, when a venting of the gas occurs through the contact 3, opening 6, and channel 8. The channel 9 vents upwards, as shown in dotted lines. The movable contact and chamber may be placed in the position shown, or inverted, on supports on a wall, Figs. 2, 3 (not shown).
Patent GB-491541-A (GB)
Title: Improvements in and relating to the production of titanium dioxide and products containing the same
IPC: C01G23/053
Filed: 1937-03-08
Abstract: Titanium dioxide is prepared by the hydrolysis, by heating, of titanium sulphate solutions containing at least 14 per cent by weight of TiO2 and less than two mols H2SO4 free and combined per mol of titanium, and having a water content less than 55 per cent by weight. Preferably the solutions contain more than 25 per cent by weight of sulphuric acid, and no more ferrous sulphate than corresponds to its solubility in the solutions used at 15 DEG  C.  Adjustment of the water content of the solution may be effected by evaporation at atmospheric or reduced pressure, or by addition of a soluble substance such as ammonium sulphate which does not react with the constituents of the solution.  Hydrolysis may be effected in the presence of nuclei comprising colloidal titanium hydrates or tin oxide and at temperatures between 80 and 200 DEG  C. if necessary under pressure.  Composite products may be obtained by carrying out the hydrolysis in the presence of carriers such as blanc fixe or calcium sulphate, and boron or phosphorus compounds may be added to the solution before hydrolysis or to the hydrolysis product. Examples of operation are given.  The Specification as open to inspection under Sect. 91 comprises also adjustment of the water content of the solution by addition of glycerol, ethylene glycol, or alcohols having a boiling point higher than 100 DEG  C.  Solutions may also be used having a TiO2 content of less than 14 per cent by weight.  This subject-matter does not appear in the Specification as accepted.
Patent GB-141387-A (GB)
Title: Improvements in and relating to electric motor control systems
IPC: H02K47/30
Filed: 1917-05-15
Abstract: 141,387. British Thomson - Houston Co., (General Electric Co.). May 15, 1917. Systems for alternating-current motors only.- In a system of conversion from single-phase to polyphase currents a converter of the polyphase induction motor type is used and its exciting winding 4 is arranged to be connected in series with the phase 1, 2, of the load circuit and the transformer windings s', s<2> when the switch 8 is open. In the example shown, the load consists of a three-phase motor with star connected windings m. The induced current windings 5, 6 of the converter are connected to the transformer p and the load as shown. With this series' connexion balanced currents are maintained in the several phases with fluctuating loads. By closing the switch 8 the phase 1, 2 is supplied from the transformer winding s<1> independently of the converter, and the converter phase 4 is supplied from the transformer winding s<2>. Balanced currents are then obtained at a pre-determined load with a high power factor. The rotor of the converter has a winding 7 supplied with current from an exciter E, the voltage of which can be varied by adjusting the resistance r. The windings on the stator of the converter are divided as shown in Fig. 2, each of the windings 5, 6, being divided into two parts which are cross-connected. Specification 10531/14 is referred to.
Patent GB-726099-A (GB)
Title: Motor vehicle electric lighting switching circuit
IPC: B60Q3/02
Filed: 1953-03-13
Abstract: 726,099. Switching systems for consumption apparatus. BAYERISCHE MOTOREN WERKE AKT.-GES. March 13, 1953 [March 13, 1952], No. 6934/53. Class 38 (4). A motor vehicle interior, and possibly entrance, electric lighting switching circuit comprises, serially connected with a light or lights 1 across a supply, two manually operable single pole two-way switches 8, 9, each arranged to select one or the other of two conductors 14, 15 by which their selectable contacts are interconnected, the conductors possibly including in addition one or more manually-operable doublepole two-way intermediate switches 10, and the circuit further comprising, connected in parallel with the two single-pole switches 8, 9 and their interconnections, one or more door-actuated switches 12 each arranged to be closed by opening, and opened by closing, an associated vehicle door. By the circuit the lights may be switched on, e.g. at any of the switches 8 ... 10 and switched off at any other of these switches, which may be door post mounted tumbler switches; they may be set to leave the lights on or off after the vehicle doors have been closed.
Patent GB-646404-A (GB)
Title: Improvements in or relating to the starting of two-stroke cycle diesel engines
IPC: F01L13/00
Filed: 1948-03-08
Abstract: 646,404. Starting. POBJOY, E. E., [Representative of POBJOY, D. R.]. March 8, 1948, No. 7025. [Class 7(v)] In a two-stroke Diesel engine, the ex haust valve gear is adjustable to cause the valve to close earlier at starting. A cam 7a, Fig. 1, acts upon the exhaust valve stem or valve tappet 8 through a lever 6 pivoted at 9 on a crank 10 rotatable to move the lever 6 to the left to cause the valve to close earlier. The time of opening of the valve remains substantially constant as the earlier contact of the cam rise 7a with the lever 6 is compensated by an increased clearance between the lever 6 and stem 8. The lever 6 may also be moved to the rikht to cause the exhaust valve to close later, reducing the compression so that a wick carburetter 14, Fig. 5, filled with ether may be used for cold starting. A lever 12a, connected to the shaft of crank 10 at 11a, simultaneously controls the lever 6 and a throttle valve 15 in the air induction pipe 16, which is open when lever 12a holds lever 6 in the normal running or starting positions R, S. At cold starting, the lever 12a is moved to position E, closing the valve 15, so that air is drawn in through a pipe 17 past carburetter 14.