baber/WOPTO huggingface dataset:
Patent GB-236565-A (GB)
Title: Improvements in and relating to speed control of induction motors
IPC: H02K17/38
Filed: 1925-07-01
Abstract: 236,565. British Thomson-Houston Co., Ltd., (Assignees of Compagnie Franþaise pour l'Exploitation des ProcÚdÚs Thomson- Houston). July 1, 1924, [Convention date]. Alternating - current induction machines. - The speed of an induction motor A is regulated by a commutator machine B, cascaded with its rotor, the stator e of the machine B being excited by a frequency changer C, the rotor winding r of which supplies the voltage componen balancing t h e ohmic drop in the windings e, anc the stator winding s of which directly supplies the component balancing the inductive drop. The machine C runs synchronously with the motor A and is supplied from an auto- or other transformer D with variable tappings. The speed of the motor A is regulated by varying the tappings of the transformer D, a current transformer E being included in the circuit so as to obtain substantially constant power factor with different loads and speeds. In a modification, an untapped transformer D feeds the common slip-rings of two mechanically-coupled frequency transformers, such as the machine C, of which the stators s together with the brushes d can be angularly displaced so as to regulate the value and phase of the excitation voltage. This second method gives continuity of regulation, and the angular displacement may be controlled by a servomotor.
Patent GB-585425-A (GB)
Title: A vertical speed indicating instrument
IPC: G01P3/62
Filed: 1944-09-06
Abstract: 585,425. Toothed gearing. SQUARE D CO. Sept. 6, 1944, No. 17005. Convention date, Dec. 29, 1943. [Class 80 (i)] [Also in Group XIX] Toothed gearing for obtaining a non-linear relationship between one shaft 53 and another 64 comprises an eccentrically mounted pinion 63 on shaft 64 engaging a sector 61, of suitable configuration to maintain mesh with the gear 63, on the shaft 53.
Patent GB-170116-A (GB)
Abstract: 170,116. Jackson, W. J. Mellersh-, (Herman, S., and Herman, R., [trading as Diamond Power Specialty Co.]). July 15, 1920. Cleaning, fluid - pressure processes for.- Brackets by which blower tubes are supported from one member of a nest of boiler tubes are made with segmental heads 20, 23 which are manipulated on the boiler tube to bring undercut notches and projections 25, 26 into engagement, the parts being finally secured by a through bolt 30. In another form where the blower tube is arranged adjacent to the surface of a header it is maintained in position by the hooked bottom portion 48, Fig. 15, of the bracket, a segmental bearing 49 being provided for preventing the nozzles 50 from fouling the inner side of the bracket. The bracket support in this case consists of a member having aT-head 42 engaging a slotted flange 43 on the other member, the whole being secured by the transverse bolt 44. In cases where the blower tube is arranged amidst the boiler tubes the bottom of the bracket consists of a downwardly pointing fork which prevents lateral play. Specification 114,557 is referred to-
Patent GB-217773-A (GB)
Title: Improvements in or relating to typographical or record strip preparing or composing machines
IPC: B41B25/00
Filed: 1923-07-02
Abstract: 217,773. Lanston Monotype Corporation, Ltd., (Lanston Monotype Machine Co.). July 2, 1923. Strip-perforating machines; keyboards.-Relates to means for reducing the number of punches and, consequently, the width of the record-strip in machines such as that described in Specification 17199/08, with the minimum amount of change in the construction of the machine. For a die-case containing two hundred and twenty-five matrices, eleven punches are employed, four for positioning the die-case in each direction, two justification punches, and a justifying-space punch, each character signal comprising one, two, or more perforations. The punches 42 are carried by punch-bars 38, 39 each having a lug 40, which is operated by one of a series of converting-levers or rocking-bails 35, 36. The bails are operated in various combinations by lugs on a series of thirty-three bars 17, which correspond to the thirty-three punch-bars desribed in the prior Specification. The bars 17 are operated from the keys in known manner through permutation mechanism 11, 12, valves 13, motors 15, and levers 16. Specification 8633/99 also is referred to.
Patent GB-802362-A (GB)
Title: Preparation of flexible elastomeric cellular materials
Inventor: PACE HENRY A
IPC: C08J9/00
Filed: 1956-06-04
Abstract: A process of preparing a flexible, elastomeric cellular material from the reaction of 2,4-tolylene diisocyanate, water and an active-hydrogen-containing polymeric material having an average molecular weight of from 750 to 2,250 and an acid number not greater than 5, comprises forming a prepolymer by reacting the polymeric material with from 0.9 to 1.10 mol. of 2,4-tolylene diisocyanate per mol. of the polymeric material until the exothermic heat of reaction has been substantially evolved and removed from the reaction mixture, adding further 2,4-tolylene diisocyanate and water to the prepolymer and permitting the complete reaction mixture to expand and cure, conducting either and preferably both, of the diisocyanate reactions in the presence of from 0.5 to 3 parts of castor oil per 100 parts by weight of the active-hydrogen-containing polymeric material.  The expression "active-hydrogen-containing polymeric materials" means polyesters, polyesteramides and polyalkylene ether glycols. Suitable materials are those employed in the process of Specifications 694,982, 696,449, 696,450, 731,071 and U.S.A. Specification 2,692,873.  In examples there is employed a prepolymer, obtained by reacting a polyester (of molecular weight 1810, hydroxyl number 60 and acid number 2) from adipic acid and mixed ethylene, diethylene and butylene glycols with 2,4-tolylene diisocyanate, castor oil also being present in the reaction mixture.  In example (3) the prepolymer is mixed with 2,4-tolylene diisocyanate, water, N-methylmorpholine and a condensation product of 4 mols. of butyraldehyde with one mol. of aniline, and the mixture is poured into a mould to give a foamed product.  In Examples (4) and (5) castor oil also is added to the prepolymer along with the diisocyanate, water and catalysts.  For comparison, foamed products are prepared in Examples (1), not employing castor oil in the reaction mixture; (2) using a mixture of tolylene-2,4 and 2,6-diisocyanates in the absence of castor oil. Specification 797,227 also is referred to.
Patent GB-603704-A (GB)
Title: Improvements in separating dust from gases
IPC: B01D45/08
Filed: 1943-10-19
Abstract: 603,704. Air cleaners. BRITISH FILTERS, Ltd., and WORTH, T. C. Oct. 19, 1943, No. 17188. [Class 8 (ii)] Dust is separated from air or gas by spacedinclined baffles 15, and the air &c. thus partly cleaned is filtered by a body 5 of material, e.g. knitted wire, e.g. after impact on an oil bath. The oil may be contained in a detachable bath 7 in which a trough 8 is supported, receiving oil through an aperture 9. The preliminary collector 12 has a removable cover 14. The air on entering the baffle separator may impinge on a curved baffle or hood, causing change of direction and separation of dust. In a modification, air &c. enters from two sources in variable proportions controlled by a valve and passes past baffles arranged in echelon to oil baths and filters of the kind described in Specification 574,128.
Patent GB-826666-A (GB)
Title: A new or improved roller assemblage
Inventor: NICHOLLS BENDLE HENRY
IPC: B65G39/09
Filed: 1955-06-15
Abstract: 826,666. Rollers. HANMADE CONVEYOR CO. Ltd. June 1, 1956 [June 15, 1955], No. 17254/55. Addition to 772,048. Class 42 (2). [Also in Group XXX] The end disc for a conveyer idler roller disclosed in the parent Specification is modified in that it includes a substantially rigid member 6 which is attached to the roller sleeve 2, the member which is both resilient and fire-resistant being interposed between the axle 1 and the rigid member. In one form, Fig. 1, the resilient and fire-resistant member 4 is fitted within an enlargement of the bore of member 6 and a bearing 3 is located within a recess in the member 4. The member 4 incorporates a dust seal 7. In another form, Fig. 2, the member 4 is held within a large-diameter bore of the member 6 by a circlip 8 and an oil reservoir is provided. In a further form, Fig. 7, the member 4 is fitted on the axle and the bearing 3 interposed between the members 4 and 6. Various other arrangements incorporating these features are also shown.
Patent GB-1035163-A (GB)
Title: Sweetening of sour hydrocarbon distillates
IPC: C10G27/04
Filed: 1963-05-02
Abstract: Sour hydrocarbon distillates are sweetened by contacting with an inhibitor sweetening agent in the presence of an oxidizing agent, for example air, and an alkaline reagent, characterized in that there is also present an N-alkyl-alkanolamine soluble in said distillate. Preferably the alkanolamine contains 4-30 carbon atoms in the alkyl group and 2-6 carbon atoms in the alkanol group.  The inhibitor sweetening agent is preferably present in an amount of 0.0001-1% weight, and the N-alkyl-alkanolamine is preferably employed in an amount of 1-50% weight of the sweetening agent.  The inhibitor sweetening agent is preferably a phenylene diamine or other aromatic diamine.
Patent GB-434448-A (GB)
Title: Improvements in or relating to thermionic relay circuits, with special reference to long distance telephony
IPC: H04Q1/453
Filed: 1934-06-12
Abstract: 434,448. Exchange systems. HADFIELD, B. M., 3, Melville Gardens, Palmers Green, London. June 12, 1934, No. 17386. [Class 40 (iv)] [See also Group XL] In voice-frequency signalling systems employing current limiters, the tendency of the current limiters to cause false operation of the signal receiver by generating harmonics having signal frequencies on the arrival of strong currents of sub-multiple frequencies is counteracted by disabling signal receiving apparatus on the arrival of one or more selected sub-multiples. As shown in Fig. 1, the triode VA (or a pentode if more gain is required) to which the signals are applied is biassed to act as a current limiter and comprises in its output circuit a transformer TB feeding signal operating pentodes through circuits LA, LB, tuned to the signal frequencies (600 and 750), and transformers TC, TD tuned respectively to sub-multiples of the signal frequencies (e.g. 375 and 300). On the reception of its own signal and in the absence of other signals the anode current of the pentode VB (say) is considerably increased owing to the positive bias applied to the signal grid from the back coupling circuit TE, UA, CC and the relay X operates. In the presence of submultiple frequency signals, for example in speech, however, no actuation of X takes place since the sub-multiple signals after selection in circuits TC, TD and rectification at BA, BB put a paralyzing bias on the suppressor grids of both pentodes in opposition to the normal positive bias provided by RD. The circuits TC, TD need not be tuned exactly to sub-multiple frequencies and may be made to cover a band or bands of frequencies. In a modification, Fig. 2 (not shown), triodes are used instead of pentodes and the paralyzing bias is applied through a further rectifier to the signal grid. A similar circuit may be provided with pentodes having the suppresser grids connected to the cathode in the usual way. The limiting triode VA may be replaced by two triodes in push-pull, Fig. 3 (not shown), in which case only odd harmonics are generated or by a variable-Á- pentode, Fig. 4 (not shown). In this case also the circuit conditions are such that only odd harmonics are produced. A variable -Á tetrode may be employed.
Patent GB-686677-A (GB)
Title: Improvements in or relating to props especially pit props
IPC: E21D15/32
Filed: 1949-07-01
Abstract: 686,677. Pit props. ESSEN-BOTTROPER HANDELSGES, [trading as SCHWARZ KOMMANDIT-GES, H.] and HEUSNER, W. June 7, 1950 [June 7, 1949], No. 17406/49. Class 20(ii) [Also in Group XXV] A telescopic pit prop is held in operative position by the inherent elasticity of a stressed clamp 6 which is stressed to a higher value, e.g. opened out by a wedge or cam to release the prop. In Figs. la, 1c and 1d the upper prop part 3 is of I-section, the web of which is engaged by brake blocks 8. 9 forced against it by the clamp 6. The clamp is opened to release the prop by cams on a member 63 rotatable on a spindle 65 between the jaws of the clamp, and engaging face cams 61 on the clamp. The wedge shaped brake block 9 prevents the upper prop 3 falling when the clamp is released. In a modification shown in Fig. 2c the clamp 13 engages a cylindrical upper prop part 11 by a friction lining and is released by a wedge 20. The clamp 13 is secured to the lower prop part by hookshaped projections adapted to be engaged with grooves in brackets 16 by a rotary motion. Lugs on the lower prop part and wedge 20 prevent these parts separating and being lost. In a further modification, Figs. 3a-c (not shown), two or more clamps are provided one above the other and in Figs. 4a and 4b (not shown), one clamp surrounds and acts on the other. In Fig. 5a a clamp is moved into a spiral and the two ends 35, 36 are opened by a wedge 37 guided on pins 41 fixed to a casing 39 enclosing the clamp. In a further modification the lower prop part 10, Fig. 7b is slotted vertically and the clamp 45 compresses it upon the upper prop part 11. A tapered slotted ring may be arranged between the clamp and the prop to take up wear and ensure the maintenance of the same pressure on the prop. The clamp may also be inside the prop and be constructed to expand outwardly to hold the prop operative.
Patent GB-565980-A (GB)
Title: Improvements in methods of making fibrous sheet materials
IPC: D21H17/36
Filed: 1942-12-08
Abstract: Paper &c. is sized by adding to the pulp a finely-divided polyvinyl alcohol, which swells in water and dissolves in hot water, and maintaining the size in a water-swollen state until the wet pulp web is heated, as on the drying cylinders, so that the size partially dissolves and may set into a solid mass. Cold-water-soluble constituents may be separated out before mixing the size with the pulp, and frothing may be reduced by chromium compounds, or ferric chloride &c.  The size, particles of which may pass screens of 50 to 500 mesh, may be added to the pulp suspension at the beater or stuff-box &c., and the pulp may thereupon be agitated for 10 to 30 to improve retention of the size by the fibres.  The drying cylinders may be at 130 to 450 DEG  F. The product is of high wet-strength, flexible and grease-repellant, and may be used for lithographic printing. Clay, casein, rosin and alum, &c. may also be incorporated.
Patent GB-174624-A (GB)
Abstract: 174,624. L³ske, K., Moussong, A., Moussong, P., and Moussong, G. Aug. 2, 1920, [Convention date]. Closed solid - fuel stoves; grates ; air supply for combustion ; steam supply for increasing combustion. -In a closed solid-fuel down-draught stove, of the type in which the air - admission apertures lie in proximity to the grate and the closed ash-pit is connected to the chimney, the grate surface is divided by a substantially vertical grid into two parts, through one of which a portion of the air supply passes to effect secondary combustion below the grate, being heated in its passage. The stove shown comprises a shaft l with the grate b on which a perforated fuel-basket is arranged so as to divide the front part of the grate, in which are the air apertures b<1> from the remainder. Side flues (not shown) between the shaft l and external stove casing connect the closed ash-pit g with a chamber h<1> leading to the flue i. Air for combustion is supplied through the tapering nozzle r carried by-the lower furnace door e and arranged slightly above the grate, a part'passing through the apertures b<1> in the grate to effect secondary combustion beneath it. Inside the doors e, e<1> is a suspended grating k, which may be moved to effect the division of the grate surface when the fuel-basket j is not used. The stove may be provided with means for spraying the glowing fuel with water to increase the combustion.
Patent GB-184947-A (GB)
Title: Improvements in and relating to the packing of curved surgical needles
IPC: A61B17/06
Filed: 1921-06-27
Abstract: 184,947. Souttar, H. S. June 27, 1921. Putting-up instruments. - Curved surgical needles, which may have the ligatures attached to them, are packed by placing them in containers constructed in two portions 2 provided with flanges 3 which are cemented together, an impervious coating being applied by dipping them into molten wax &c. A thread 4 of silk &c. may be secured between the flanges 3 to link together several containers so that they may be dipped simultaneously.
Patent GB-1015885-A (GB)
Title: Modified polyolefines
Inventor: MILBURN ALEXANDRA HIRAM
IPC: C08G73/08
Filed: 1963-05-03
Abstract: Shaped articles having high affinity for acid dyestuffs are obtained from compositions of stereoregular polyolefins with aminotriazole copolymers which are defined as the products of reaction of hydrazine with at least one dicarboxylic acid or derivative thereof at least one monocarboxylic acid or derivative thereof.  In examples the aminotriazole copolymers used are obtained by reaction of adipic dihydrazide, sebacic dihydrazide, stearic hydrazide, hydrazine hydrate and water.
Patent GB-782033-A (GB)
Title: Improvements in and relating to picture projection screens
IPC: G03B21/62
Filed: 1955-06-20
Abstract: 782,033. Projection screens. JACOBSON. J. S. and NAAMLOOZE VENNOOTSCHAP EXPLOITATIE MAATSCHAPPIJ HET HOF VAN HOLLAND. June 20, 1955 [June 28, 1954], No. 17745/55. Class 97(1) The irregularities on the surface of a light transmitting screen are bounded by portions AP, PB of sine curves, each containing a point of inflection, intersecting at the crests and troughs of the irregularities, the tangents HC, HD at the points of inflection making angles of at least 5 degrees with the screen plane. The irregularities of the cross section shown may be parallel ridges which may be straight or curved or intersecting or short ridges of random shape and length or figures of revolution.
Patent GB-191679-A (GB)
Title: Improvements in watch bows and pendants
IPC: G04B37/14
Filed: 1922-06-28
Abstract: 191,679. Wachter, L. E. F. June 28, 1922. Bows and pendants. - In watch pendants of the kind which are horizontally divided to enable the bow to be removed readily, as described in Specification 163,616 independent bearings are provided for the bow ends. The Figure shows bearings 10 having dovetail extensions 11 adapted to be engaged in recesses in the pendant 4 and collar 6. In modifications, the extensions may be spherical or of other form.
Patent GB-887332-A (GB)
Title: Improvements in or relating to corn pads and blanks therefor
IPC: A61F13/06
Filed: 1958-06-04
Abstract: 887,332. Chiropody appliances. SCHOLL MFG. CO. Ltd. June 4, 1958 [Nov. 27, 1957], No. 17922/58. Class 81 (2). A foot pad is made in the form of two, oppositely directed, hookshaped portions 5, 6, joined by a narrow strip When required for use, the two end portions are bent round, as along the arrows 8, 9, overlapped, as shown dotted, and fastened together by adhesive. This causes the strip 7 to fold upward, as at 10, to form a convenient toe loop. If desired, the strip 7 may carry a further pad portion at its mid-point, so that this comes between the toes and forms an additional locating means or is used to relieve pressure on a corn between the toes. Specification 887,330 is referred to.
Patent GB-668716-A (GB)
Title: Process for making seamless porous tubes from rubber or similar mouldable and vulcanizable materials
IPC: B29C43/02
Filed: 1950-07-18
Abstract: Fine particles of a leachable solid filler, e.g. sodium nitrate, are mixed with a vulcanizable synthetic rubber or similar vulcanizable substances such as certain thermoplastic and thermosetting resins, and the mixture moulded to form a tube.  The filler is then leached out to form a porous tube.  The moulding material may comprise a mixture of butadiene-acrylonitrile copolymer, zinc oxide, benzothiazyl disulfide, phenyl - beta - naphthylamine, stearic acid, channel carbon black, and sulphur. Details of the parts of weight of this mixture are described. Vulcanizable butadiene copolymer material as described in Specification 583,825, [Group V], may be used.  A vulcanizable acrylonitrile copolymer may be milled with sodium nitrate as described in Specification 653,546, [Group V].
Patent GB-1136245-A (GB)
Title: Spark ignition systems for motorcycles
Inventor: YARDLEY ALFRED HAROLD
IPC: F02P1/08
Filed: 1965-04-29
Abstract: 1,136,245. Ignition systems. JOSEPH LUCAS (INDUSTRIES) Ltd. April 6, 1966 [April 29, 1965], No. 18026/65. Heading F1B. In a spark ignition system for a motor cycle an alternator 11 provides power through a rectifier 2 to a pair of supply lines between which the ignition coil 15 and interupter 16 are connected in series and a capacitor 22 and a switch 23 are connected in series across the supply lines. The switch can be operated either manually or automatically when the engine has started. Conveniently the switch is operated by the kickstart mechanism. A Zener diode 21 acts as a voltage regulator.
Patent GB-918680-A (GB)
Title: Improvements in or relating to separation of nitrogen compounds
IPC: C01B21/20
Filed: 1959-05-27
Abstract: Nitrous acid, nitric oxide, nitrogen dioxide, nitrogen trioxide, nitrogen tetroxide, or nitrogen pentoxide are removed from gas or liquid containing them by contacting with an electron donor compound which is chemically reactive with the nitrogen compounds only by forming donor-acceptor valency bonds and is a selective absorbent for acetylene.  When the fluid contains nitric oxide, nitric acid is added to the donor compound to ensure that the average oxidation state of the fixed nitrogen is at least 3. Donor compounds may be organic phosphates, phosphine oxides, nitriles, amides, ethers, sulphoxides, acetals, ketones, aldehydes, or acids and a number are specified particularly, tri-n-butyl phosphate, dimethyl formamide, tri-ethylene glycol, dimethyl ether, dimethyl sulphoxide or hexamethyl phosphoramide. Water may be added to the donor compound in molar ratio 0,1 to 10:1 to increase absorption, and the donor compound may be 2-25% soluble.  The donor compound may also be mixed with a water immiscible diluent in vol. ratio 0,2 to 5:1, e.g. hydrocarbon oil, a halogenated, or nitrated, hydrocarbon or ether, of which a number are specified.  The treatment may be effected at 2-150 p.s.i.a. and 0 DEG -200 DEG F.  With liquid donor compounds contact may be countercurrent in a packed tower, while solid donors may be used as a bed or in suspension.  The nitrogen compounds may be recovered by treatment with an aqueous base yielding a nitrite, or by steam distillation, or distillation.  Alternatively, the complexed enriched donor compound may be treated with an oxidizing agent in the presence of a Lewis acid, and NO2 recovered as HNO3 by water wash, or as nitrate by extraction with NH3, NH4OH, or alkali metal hydroxide. Oxidizing agents may be O2, air, H2O2, perchloric acid or its salts, potassium permanganate or dichromate, peracetic acid, Na2O2, or cumyl peroxide.  Lewis acids may be substances with H0 function less than +3, e.g. mineral acids, FeCl3, AlCl3, or ion exchange resins. Apparatus for continuous operation is described in which the oxidation and extraction are carried out in the same column as the absorption and in a separate column.  The complex enriched donor compound may be passed with air through a solid Lewis acid or the solid may be suspended in the donor.