baber/WOPTO huggingface dataset:
Patent GB-443137-A (GB)
Title: Improvements in and connected with filters
Filed: 1934-08-20
Abstract: 443,137. Filters. FILTRATION & WATER SOFTENING PROPRIETARY, Ltd., 395, Collins Street, Melbourne, Australia. Aug. 20, 1934, No. 22746/35. Convention date, Aug. 18, 1933. Divided out of 443,112. [Class 46] In a sand or like filter one or more vertical draw-off passages are arranged with their lower ends just above the upper surface of the bed when the latter is expanded by a reverse flow of wash water so as to constitute a zone of increased velocity to facilitate the removal of impurities which would otherwise remain in suspension above the bed. As shown in Fig. 1, the upper end of the filter chamber 10 converges towards a central passage 15 the lower end of which is just above the level 17 to which the bed rises when expanded by an upward flow of wash water. A valve 18 which controls the flow of wash water may be operated manually, by a float 19 and a reversible electric motor, or by a photo-electric cell responsive to the comparative opacity of the upper portion of the expanded bed. Fig. 3 shows a filter in which the passage 15 is formed in a diaphragm 25 which can be adjusted vertically by means similar to those for controlling the valve 18. The diaphragm 25 may be constructed as a float responsive to the level of the expanded bed. As shown in Fig. 4 an annular wash water passage is formed around a displacement member 30, which can be raised or lowered. Fig. 5 shows a larger filter with a partition 33 forming a number of passages 15. In the form shown in Fig. 7, a central displacement member 46 is arranged in a position between that of the upper normal surface 16 of the bed and the level 17 to which the bed is expanded by the reverse flow of the wash water. Any of the passages 15 may be provided with helical vanes or other projections to give rotary movement to water passing therethrough. Specification 443,112 is referred to.
Patent GB-1060576-A (GB)
Title: Aromatic polyquinazolinediones
IPC: C08L75/00
Filed: 1964-06-02
Abstract: Aromatic polyquinazolinediones containing recurring structural units of general formula <FORM:1060576/C3/1> or of formula <FORM:1060576/C3/2> or a mixture of units I and II, wherein -(-Z-)- represents <FORM:1060576/C3/3> -R- represents a direct carbon-to-carbon bond between the two aromatic rings or a divalent radical which is either alkylene having 1-3 C, -O-, -CONH-, -S- or <FORM:1060576/C3/4> -R1 is a hydrogen atom or a methyl or ethyl radical; and the bonds (1) and (2) are ortho with respect to each other, are prepared by heating a mixture of about equimolar quantities of (a) an aromatic diaminodicarboxylic acid or its esters, of the general formula <FORM:1060576/C3/5> where Y is either hydrogen, alkyl, aryl or aralkyl; -R- is as defined above the nuclear substituents -NH2 (4) and -COOY (5) being ortho to each other with (b) an aromatic diisocyanate which is either <FORM:1060576/C3/6>
Patent GB-1499426-A (GB)
Title: Filter capsules
IPC: B01D27/08
Filed: 1975-05-23
Abstract: 1499426 Filter housing ROBERT BOSCH GmbH 23 May 1975 [23 Oct 1974] 22890/75 Heading BID The wall of a disposable housing, enclosing a filter elements (not shown), comprises an upper metal portion and a lower bowl-like portion of transparent plastics, which is moulded on to the lower edge of the metal portion, a layer or beading of thermoplastics, rubber, lacquer or adhesive making a sealed joint between the two portions and allowing differential expansion. In Fig. 4 the edge of the metal portion is bent back and provided with a complete coating of the sealing material which applied by injection moulding or dipping before the plastics portion is moulded on. Figs. 1 to 3 (not shown) illustrate similar joints with differently shaped edges to the metal portions. In Fig. 5 metal portion 31 engages plastics portion 33 directly but a bead 36 of sealing material is provided inside the housing. In Fig. 6 (not shown) metal portion (41) is bent inwards to embrace the plastics portion with an intermediate layer (46) of L-section.
Patent GB-1151302-A (GB)
Title: Improvements in and relating to Computer Equipment for Numerical Solution of Complex Number Problems
Inventor: BLAHA EDUARD
IPC: G06J1/00
Filed: 1967-05-18
Abstract: 1,151,302. Combined digital analogue computer. TESLA, NARODNI PODNIK. 18 May, 1967, No. 23041/67. Headings G4A and G4G. Computer equipment for solving complex number calculations comprises an analogue unit, a digital unit and linkages therebetween, whereby electric signals corresponding to the absolute values of the real and imaginary parts of the complex numbers are fed to the analogue unit and the signals of the plus and minus signs are fed to the digital unit and by means of an analogue-to-digital linkage the signals are transferred to determine the final sign of the result and the signals of the analogue and digital units are brought to an evaluation unit which indicates the desired result. If two numbers k 1 a +jk 2 b and k 3 c +jk 4 d are to be multiplied, where k 1 -k 4  are the plus or minus signs, to produce a result m(ac+nbd)+ jp(ad+rbc, where m, n, p, r are plus or minus signs, the portions a, b, c, d are fed to the analogue unit to produce the quantities ac, bd, ad, be and the signs are fed to the digital unit. A truth table indicating the 16 combinations of the signs k 1 -k 4  enables Boolean equations to be drawn up for m, n, p, r. For instance m= k 1 k 3 +#k 1 #k 3 , p=k 1 k 4 +#k 1 k 4  and logic units can determine the values m, n, p, r. The equations assume that the real quantity in brackets is positive, e.g. if k 1  - k 4 = 1 then (a+jb (c+jd)= (ac - bd)+j(ad +bc) therefore m= + 1, n=-1. However, a correction of m must occur if ac<bd and the analogue-to-digital linkage allows these corrections to occur for m when n=-1, ac<bd, and for p when r=-1, ad<bc. A digitalto-analogue link is necessary to allow the signs n, r to be inserted in the mathematical operations. Division is performed using the equation:
Patent GB-186794-A (GB)
Title: Improvements in automatic apparatus for signalling railroad trains in motion
IPC: B61L13/04
Filed: 1921-08-31
Abstract: 186,794. Bona, G. D. Aug. 31, 1921. Drawings to Specification. Earth cells.-A battery is formed by filling an excavation in the ground with good vegetable earth mixed with ammonium sulphate or sodium nitrate and inserting charcoal and zinc plates.
Patent GB-260559-A (GB)
Title: An improved process for the removal of fibrous fly from looms and other textile machines
IPC: D03J1/00
Filed: 1926-09-21
Abstract: 260,559. Gminder, E. Oct. 31, 1925, [Convention date]. Weavers' tools.-Accumulation of fibrous fly v in warp stop-motion devices, lease rods, &c. is removed by a nipping-device k which is set in rotation whereby the fly is twisted together so that it may be withdrawn. The device may be rotated by the flexible shaft of a dental motor carried by the operative.
Patent GB-1191422-A (GB)
Title: A Thyristor Inverter.
IPC: H02M7/523
Filed: 1968-05-16
Abstract: 1,191,422. Invertors. SOC. ALSACIENNE D'ETUDES ET DE TRAVAUX, and P. L. F. GABORIAUD. 16 May, 1968 [16 May, 1967], No. 23405/68. Heading H2F. In an invertor (e.g. for induction heating), thyristors T1, T2, T3, T4 (Fig. 1) connected to a D.C. source E (or a rectified A.C. source) by a capacitive voltage divider C1, C2, C3, C4, are fired sequentially by four phase firing pulse trains 1, 2, 3, 4 (Fig. 2) respectively, to pass current through a transformer half primaries P1, P2 and produce a sinusoidal output at a frequency N from a secondary S1 which is tuned by a capacitor C. In each firing pulse train the pulses have a recurrence frequency of N/4 and a repetition period T = 4/N. The pulse trains are successively phase shifted by T/4 (as shown). Each thyristor may be replaced by a plurality of thyristors in series and parallel, all of the thyristors in one stage being triggered by the same drive signal. Operation.-A drive pulse 1 fires T1 which conducts. C1 behaves as a voltage source and delivers current through T1, P1, L1, C5. This current passing through L1, C5 (having a natural frequency N/2) first changes C5 to its peak voltage then falls to zero after a half-wave having a time duration T/4, then begins to reverse and blocks T1. At the instant T1 is blocked a drive pulse 2 triggers T2 to conduction. C5 adds its voltage to that of C2 and both discharge through L1, P1, T2, thus delivering a current half-wave through one half of the primary P1. This halfwave has the same direction and duration T/4 as the previous half-wave through the primary as before when current begins to reverse T2 is blocked and a pulse 3 triggers T3 into conduction and an identical cycle of operation is initiated in the circuits including T3, T4, P2, C3, C4, C6. In the secondary S1 there is produced a series of signals having a period T/4 and therefore a frequency N. Sl is tuned to frequency N by a capacitor C and a sinusoidal current is applied to the load Z at a frequency N. Overvoltage due to current interruption in the thyristors is limited by a secondary winding S2 in series with a diode D. Firing circuit (Figs. 3 and 4, not shown).- Two bi-stable units, each arranged as a frequency divider, are fed respectively with signals in anti-phase from an a stable multivibrator. The first bi-stable unit produces two square wave pulse trains in anti-phase, as does the second. The signals from the second unit are, in addition, displaced from those of the first so that 4 phased square waved signals are produced, from the leading edges of which the firing pulses are derived. The pulses may be applied to the thyristor gates via isolating transformers and buffer stages. Likewise 8 phased signals can be produced to excite 8 thyristors and so on.
Patent GB-779933-A (GB)
Title: Two-speed coaster hub for velocipedes and the like
IPC: F16H61/02
Filed: 1955-08-15
Abstract: 779,933. Coaster hubs. BENDIX AVIATION CORPORATION. Aug. 15, 1955 [Sept. 1, 1954], No. 23465/55. Class 136(2). [Also in Group XXIV] A two speed coaster hub includes primary means for rotating a hub from a driving member through a primary clutch which is engaged by forward rotation of the driving member and secondary means for rotating the hub from the driving member through a speed reducing gearing and a secondary self tightening clutch, there being provided means to limit the torque capacity of the primary clutch and means responsive to slippage of the primary clutch for causing engagement of the secondary clutch. A driving member 14 with a sprocket 15 has internal teeth 26 meshing planet gears 23 engaging a sun gear 22 rigid with a member 18 fixed on the stationary axle 1. A low speed clutch member 37 is threaded on a screw shaft 12 fixed to the planet carrier and a high speed clutch member 29 is threaded on a screwed sleeve 16 fixed to the driving member 14. Conical clutch faces 31, 38 on the clutch members 29, 37, co-operate with corresponding faces 32, 39 on a sleeve 33 slidably splined to the wheel hub 9. Normally, rotation of the driving member 14 screws the clutch member 29 to the left against an abutment 35 to engage the clutch faces 31, 32, to drive the hub 9 in top gear. The pressure between the clutch faces is determined by a spring 34. Should the clutch slip to an extent that the screw shaft 12 rotates faster than the hub then the clutch member 37 screws to the left to engage clutch faces 38, 39 and move the sleeve 33 to the left to fully compress the spring 34 and disengage the clutch 31, 32. The drive is then in low gear. When the resistance torque is reduced the drive passes automatically again into top gear. The clutch members 29, 37 are frictionally engaged by drag members 41, 42 to enable them to function properly. If the driving member is rotated backwardly the clutch member 37 moves to the right to force a member 6 towards a fixed member 2 to which it is splined so that brake blocks 8 are forced radially outwards to bear against the inside of the hub 9. In a modification means are provided for adjusting the initial pressure of the spring 34 to regulate the torque required to cause the device to shift down to low gear.
Patent GB-155388-A (GB)
Title: Improvements in or connected with fuel economisers for steam boilers
IPC: F22D1/06
Filed: 1919-09-24
Abstract: 155,388. Green & Son, E., and Tansley, G. E. Sept. 24, 1919. Feet-water, heating.-The headers B of each section of a fuel-economizer are supported independently by ledges C on a framework A.
Patent GB-517660-A (GB)
Title: Improvements in or relating to appliances for use in permanent hair waving
IPC: A45D6/18
Filed: 1938-08-10
Abstract: 517,660. Hair-waving appliances. BERKOVI, L. Aug. 10; 1938; No. 23572. [Class 131] A pad for protecting thE .scalp from heat during permanent hair waving comprise! a perforated or slit base 1 of comparatively firm rubber or other suitable material: and' a surround 2: of softer material such as felt or spongy rubber, thus forming: a dish-like space for the accumulation of condensation. The base may be slit from the centre to one corner to facilitate passing the pad over the strand of hair under treatment. Specification. 350,979, is referredto.
Patent GB-648000-A (GB)
Title: Improvements relating to the application of fertilising and other materials to land surfaces
IPC: A01C15/16
Filed: 1947-07-23
Abstract: The subject-matter of this Specification is identical with that of Specification 647,952, but the claims differ.
Patent GB-1073582-A (GB)
Title: Solvent extraction of morpholines
Inventor: SOMEKH GEORGE SOLOMON
IPC: C07D295/023
Filed: 1964-06-09
Abstract: Morpholine or an N-alkylmorpholine is separated from aqueous solutions, having a concentration of up to 70% by volume, by contacting said solution at 50-300 DEG  C. with an inert organic solvent which is higher boiling than and completely miscible with the morpholine compound in all proportions, and substantially immiscible with water and which is non-azeotropic with the morpholine, withdrawing an extract containing the solvent, the morpholine and water and thereafter separating the morpholine by distillation.  It is preferred to a solvent which has a boiling point 10 DEG  C. higher than that of the mopholine and which forms a heterogeneous azeotrope with water.  Specified solvents include C6- 12 alkanols, alkanes, alkyl alkanoates, alkyl benzenes, saturated ketones and glycol ethers.  The extraction and distillation stages are preferably effected at approximately the temperature.  Examples relate to the use of m-xylene, 2-ethylhexanol decane and 4-methyl-2-pentyl actate as extraction solvents.
Patent GB-1401370-A (GB)
Title: Generation of motive power with metal and water as fuel
IPC: F42B19/20
Filed: 1973-05-18
Abstract: 1401370 Reaction chambers; jet propulsion plant Y KAIHO 18 May 1973 23745/73 Headings F1J and F1L [Also in Divisions B7 and F4] In an apparatus for generating motive power, a reaction chamber is pre-heated by means of hydrogen peroxide injection devices 22 and a mixture of granular metal (e.g. aluminium powder) water being supplied under pressure by means of a piston 2 and an electrically driven screw pump 6 through a nozzle 12 into the centre C of the reaction chamber, the water being vaporized into highpressure steam causing the metal granules to be injected as a fine spray into the reaction chamber. Water is also supplied through a pipe 13 into an inlet tube 14 to be heated and vaporized into high temperature steam which is delivered along passages 15, 16 to the reaction chamber through steam nozzles 17 adjacent to nozzle 12. A third supply of water is injected into the reaction chamber through a nozzle 21 to complete the exothermic reaction. The high temperature, high pressure steam generated is used as motive power by the ejection of the steam through an outlet 30 into an engine outer cylinder 25 which may take the form of a jet engine as shown wherein the ambient fluid medium is water which enters the engine outer cylinder 25 at 35 and exits through an outlet 38. The ambient fluid medium can be air. Heat sensors 26 and 31 measure the temperature in the reaction chamber and the reaction-gas outlet. The injectors 22 are formed with a catalyst through which the hydrogen peroxide passes. Hydrazine (N 2  H 4 ) is introduced under pressure through an auxiliary fuel nozzle 24 of the injector so that the hydrazine reacts with oxygen simultaneously with the nozzle injection and ignites spontaneously.
Patent GB-486833-A (GB)
Title: Improvements in pack saddles
IPC: B68C1/20
Filed: 1937-08-31
Abstract: 486,833. Carrying automatic rifles on pack saddles. BOUILLON, R. Aug. 31, 1937, No. 23824. Convention date, Sept. 7, 1936. [Class 119] [Also in Groups I and XXV] A pack saddle designed to carry a machinerifle and ammunition bags comprises a pair of bars 1 connected by two arched brackets 3 shaped to constitute the fixed halves of clamps 19 for receiving the rifles and to support the bags. Felt panels 21 and a leather covering 22 are secured to the bars 1 by laced sleeves. The upper halves of the clamps are hinged at one end and furnished with spring-pressed handled catches 13 adapted to engage divided hooks 12. The panels and saddle are held in position by straps 7a, 7b secured to the brackets and to a tri-partite girth 6 held together by a strap and buckles. The ammunition bags are mounted by a sleeve 31 on bars 30 which are suspended by straps 29 from rings 27 adapted to be hung on hooks 28 fixed to the brackets 3. Straps 38, 38a secured to the sleeves 31 pass under the bags to a ring 40 which is connected with the girth by a strap 8 and with the other ring 40 by a strap 39 passing over a plate 43 screwed to the bars 1 and spanning the spine.
Patent GB-1025643-A (GB)
Title: Improvements in or relating to the extrusion of metals
IPC: B21C23/32
Filed: 1962-06-21
Abstract: 1,025,643. Extruding; broaching; making billets. YORKSHIRE IMPERIAL METALS Ltd., and J. H. CAIRNS. May 31, 1963 [June 21, 1962], No. 23888/62. Headings B3A, B3L and B3P. Extrusion billets are scalped to a diameter smaller than the container bore in a separate operation between preheating and insertion into the container. The hot billet is scalped by pressing it through a die 1, Fig. 1 (not shown), of tungsten steel mounted in a die holder, Fig. 2 (not shown). Hydraulic or mechanical pressing means are used. After scalping, the billet may remain in contact with the atmosphere for a predetermined time to form a thin oxide film. The container bore is lubricated with oil and/or graphite or glass.
Patent GB-753961-A (GB)
Title: Process for the recovery and reutilization of unreacted ammonia and carbon dioxide in urea synthesis
IPC: C07C273/04
Filed: 1954-08-17
Abstract: The invention relates to the recovery of unused ammonia and carbon dioxide from the synthesis of urea, when the ammonia to carbon dioxide ratio is greater than theoretical.  It comprises the following four steps in combination: (1) the urea solution withdrawn continuously from the autoclave is reduced in pressure (with or without heating) to vaporize the ammonia which is then liquefied and recycled; (2) the ammonia-free solution is fractionated to decompose the ammonium carbamate into ammonia and carbon dioxide, the urea being extracted at this stage; (3) the gaseous mixture from (2) is contacted with an alkaline solution in a tower which absorbs the carbon dioxide and part of the ammonia, the rest of the latter being recycled; (4) the residual ammonia is liberated from the solution of (3) which is then heated to expel the carbon dioxide, the latter being recycled and the absorbent solution also returned for re-use. The process is described in connection with suitable apparatus which is illustrated.  The absorbent solution may be an alkali carbonate (e.g. sodium or potassium) or an amine such as mono-, di- or tri-ethanolamine.
Patent GB-686680-A (GB)
Title: Improved method and means for preventing incrustation in electrically heated water boilers
IPC: F22B1/28
Filed: 1949-09-19
Abstract: 686,680. Electrically-heated water boilers. NAAMLOOZE VENNOOTSCHAP KONINKLIJKE METAALWARENFABRIEKEN. Sept. 19, 1949 [Oct. 29, 1948], No. 24024/49. Class 39(iii) [Also in Group XVIII] Incrustation in an electrically-heated water boiler 1 is prevented by imparting low-frequency vibrations to the water by a membrane 2 which is mounted over a hole in the bottom of the boiler and is subjected to the action of an electromagnet 4, the winding of which is connected to the terminals 3 of an alternating mains of 50-60 cycles per second frequency. The membrane may also be adapted to cut off the supply of current to the heaters 11 of the boiler when the pressure in the latter exceeds a predetermined maximum and the membrane bulges downwardly as a consequence. In the example shown the membrane is provided with an earthed contact 6 which co-operates with an insulated contact 7 on the core of the magnet 4 to close a circuit including a coil 8 which, when energized, breaks a lock 9 to effect opening of switches 10 in the heating circuit.
Patent GB-887976-A (GB)
Title: Organo-polysiloxane compositions convertible to elastomers
IPC: C08L83/04
Filed: 1958-07-25
Abstract: A silicone rubber-forming composition, vulcanizable at room temperature, comprises (by weight) (1) 100 parts of a diorganosiloxane polymer of the formula ZO[R2SiO]nZ, wherein each R is a monovalent hydrocarbon or halogenated hydrocarbon radical, each Z is R or a hydrogen atom, n has an average value of at least 50 and the average R/Si ratio is 1,95 to 2,05, (2) 0,5 to 20 parts of a siloxane of the average formula RmHSiO3-m,/2 in which m has an average value between 0 and 2 (3) 0,1 to 5 parts of a condensation catalyst, and (4) 0,1 to 10 parts of a substance which is reducible by nascent hydrogen.  In siloxane (1) R can be alkyl, alkenyl, cycloalkyl, aryl, alkaryl or aralkyl, with or without halogen substituents.  Other ingredients specified are:-(3) dibutyl tin dilaurate and -maleate, zinc octoate, phenylmercuric acetate, metal chelates and oxides, boric and oleic acids and triethanol- and dibutylamines; (4) sulphur, selenium, tellurium and oxygen and compounds thereof, many examples of which are given.  Fillers, e.g. mica dust, diatomaceous earth, C blacks, silicas (fume, aerogel and xerogel), asbestos, barium titanate, fibreglass floc, Fe2O3, ZnO, TiO2, MgO, ZnS, PbO, PbO2, Al2O3, CaCO3, and micronized slate and graphite, and antioxidants, pigments, &c., may also be added.  In a typical Example (1) a mixture of sulphur, dibutyltindilaurate and tetraethylorthosilicate (as carrier) was added to a mixture of a hydroxy-terminated dimethylpolysiloxane and diatomaceous earth. Uses: for taking anatomical, and especially dental impressions. Specification 804,199 is referred to.
Patent GB-1103823-A (GB)
Title: Improvements relating to tobacco-smoke filters
Inventor: FORDYCE WILLIAM BRIAN
IPC: A24D3/02
Filed: 1964-06-10
Abstract: A method of producing a tobacco-smoke filter comprises mixing a powdered or granular tobacco-smoke filter material with a powdered or granular, low-melting, salt (i.e. a salt with a melting point below 250 DEG C. and preferably between 100 DEG  and 150 DEG C.) and heating the mixture to cause the particles of the filter material to become bonded by the salt.  The particle sizes of the materials are preferably between 20 and 50 mesh (British Standard) and the bonding salt constitutes 25-50% of the mixture.  The filter material may be charcoal, silica gel, zeolites, perlite, sepiolite, activated alumina, magnesium silicate or mixtures thereof.  Suitable bonding salts include trisodium orthophosphate, sodium perborate, calcium bromide, aluminium bromide, ferrous sulphate, cupric nitrate, soda alum, potash alum, potassium chrome alum, magnesium stearate, aluminium stearate and crystalline hydrated magnesium acetate.  A quantitative example is given using granular carbon and hydrated trisodium orthophosphate. The filters may be prepared by the apparatus described in Specification 1,103,822.