baber/WOPTO huggingface dataset:
Patent GB-694594-A (GB)
Title: Improvements in or relating to rectifier systems for supplying variable speed d.c. motors and the like
IPC: H02P7/26
Filed: 1951-02-23
Abstract: 694,594. Control of D.C. motors. HACKBRIDGE & HEWITTIC ELECTRIC CO., Ltd. Jan. 2, 1952 [Feb. 23, 1951], No. 4434/51. Class 38 (iii) A rectifier system for supplying a variable speed D.C. motor comprises two D.C. output circuits supplying respectively the armature 10 and the field 10<SP>1</SP> of a D.C. motor, the field winding being connected between a fixed potential point 16 in one of the output circuits, this potential being greater than the maximum armature potential, and a variable potential point 17 in the other output circuit, which point is also connected to the armature, such that as the armature voltage is increased the field voltage is automatically and proportionally decreased. The star points of the secondary windings of the transformers 12, 12<SP>1</SP> supplying a grid controlled rectifier 11 and a non- grid controlled rectifier 11<SP>1</SP> are connected together to form a further fixed potential point 15 which is also connected to the motor armature. Control of the rectifier 11 is by means of a phase shifter 14 thus to control the potential of the point 17 thereby simultaneously varying the field and armature potentials to vary the speed of the motor. By suitable design of the motor the field system may saturate when maximum voltage is applied thereto, the field weakening being made to be effective at any desired point not necessarily at the point when the armature voltage begins to increase. The invention may be applied to any application for supplying two load circuits with different currents.
Patent GB-524908-A (GB)
Title: Improvements in or relating to wave transmission systems
IPC: H04B3/00
Filed: 1939-02-10
Abstract: 524,908. Impedence networks. ELECTRIC & MUSICAL INDUSTRIES, Ltd., TROTT, F R., and COLLARD, J. Feb. 10, 1939, No. 4439. Addition to 495,815. [Class 40 (iii)] In a broad-band transmission system in which networks for compensating or imitating amplitude or phase distortion in a cable comprise, as described in the parent Specification, one or more groups of sections, which groups correspond respectively with the terms of a series of terms of the form X n #<SP>n</SP> by which the frequency characteristic of the cable is expressed, the sections of a group being designed so that the transmission loss or phase delay or both at the reference frequency of a section increase by equal amounts from section to section, imperfections in the equalization due to the fact that the number of sections is finite are compensated by an additional network of either of the forms shown, the limit of the range through which the reference frequencies of the main network are distributed being fixed at about twice the upper limit of the range of the frequencies to be transmitted. A single network may compensate the errors of more than one group of sections in the main network. The necessary relationships between the values of the elements of the networks are given in the Specification.
Patent GB-572086-A (GB)
Title: Improvements in lenses
IPC: G02B9/34
Filed: 1944-03-09
Abstract: 572,086. Lenses. DALLMEYER, Ltd., J. H., and LANGTON, B. March 9, 1944, No. 4440. [Class 97 (i)] An objective of the Brucke type (in which the back focus is greater than the focal length) comprises a front negative component consisting of a single positive element followed by a single negative element with an intervening air space having the form of a dispersive lens, and a rear positive component consisting of two members only and formed by a positive doublet element followed by a positive single or doublet element. The contact surface (or surfaces) of the positive component is, or are, preferably convex towards the negative component. Data are given for a lens having an equivalent focal length of 0.52 inches, a back focus of 1.1 inches, and an aperture of F/2.8.
Patent GB-953043-A (GB)
Title: Improvements in baths
IPC: E03C1/01
Filed: 1963-02-04
Abstract: 953,043. Baths. E. G. IRWIN. Feb. 4, 1963, No. 4463/63. Addition to 941,936. Heading A4N. The bath of the parent Specification is modified by the addition of a mixer valve 59 connected to the cold water supply and, optionally, a wash basin 22, the valve being arranged so that water can be directed into bath 10, tank 40 or basin 22. In order to prepare a bath, the tank 40 is filled through neck 50 with cold water, the water level being shown by gauge 44. Switch 60 is then turned to one position to energize thermostatically controlled immersion heater 53 and, when the water is hot and the lamp 61 extinguished, to another position to operate pump and motor 55 and 56 to deliver hot water to valve 59. The bath and basin have normal waste water connections.
Patent GB-524952-A (GB)
Title: Sectional steel boiler
IPC: F22B21/20
Filed: 1939-02-10
Abstract: 524,952. Sectional boilers. RECK, C. F. Feb. 10, 1939, No. 4486. [Class 123 (ii)] Sectional steel boilers have baffle walls 6 behind the furnace 1 made of contiguous parallel tubes interconnectec above and below by transverse tubes, the outer tubes having a greater depth from front to rear than the inner tubes of the walls and forming the side walls of the flue. Gaps are provided for the gases alternately above and below the walls. The outer tubes 10 of the walls of flattened circular section have overlapping ribs 11 secured together by screw-bolts. Other constructions are circular or rectangular in section and sufficiently large to dispense with ribs. Or the ribs may form a butt joint, or the rib on one tube be engaged by a rolled section iron on the adjacent tube. An alternative method of assembly employs a screw-stay running the whole length of the boiler through eyes on the furnace front and baffle walls.
Patent GB-640106-A (GB)
Title: Improvements in or relating to apparatus for controlling the supply of electric current to the heating element of an electrically heated device
IPC: H05B3/34
Filed: 1948-02-16
Abstract: 640,106. Thermal switches. THERMEGA, Ltd., and SWINDELLS, V. E. Feb. 16, 1948, No. 4536. [Class 38(v)] The thermal switch of Specification 623,576 is modified in that means are provided to ensure that the heater winding or a part thereof, is always in circuit. In Fig. 3, a subsidiary heater 8 and a switch resistance 7 are connected in series with the variable resistance 5, the arrangement being such that, even if the latter is entirely cut out, the heater 8 and the resistance 7 are in shunt with the main heater 3. The resistance 7 and heater 8 may, alternatively, be used separately with the resistance 5, Figs. 1 and 2, (not shown). Specifications 585,590, 587,111 and 593,370 also are referred to.
Patent GB-570421-A (GB)
Title: Method of and apparatus for controlling the continuous removal of volatile substances from aqueous solutions thereof by means of steam
IPC: B01D3/42
Filed: 1943-02-21
Abstract: 570,421. Distilling ammoniacal and like gascontaining liquors. GAS LIGHT & COKE CO., ADAM, W. G., MURDOCH, D. G., and GOLDING, W. E. Feb. 21, 1943, No. 4546/45. Divided out of 570,395. Drawings to Specification. [Class 32] In the removal of volatile substances from solutions containing them, e.g. free ammonia from ammonia liquors as described in Specification 570,395, the amount of steam supplied for the distillation is controlled by automatically measuring the amount of volatile substances remaining in solution after the distillation and employing, any departure from a predetermined residual amount of such substance to control the supply of steam. As shown in Fig. 1 of Specification 570,395, the liquor is fed to a conventional ammonia still 1 and the residual liquor is removed through a valve controlled pipe 23. Part of the liquor is bled through a flow controller 25, mixed with alkali and distilled in still 26, the condensate being passed to a control unit 28 where some physical property of the condensate, e.g. its conductivity or pH, is measured and departures from a predetermined value are used to control through a relay of known type the valve 16 controlling the supply of steam to the still.
Patent GB-143620-A (GB)
Title: Improvements in the electrolytic recovery of metals from their solutions
IPC: C25C7/06
Filed: 1919-02-24
Abstract: 143,620. Wade, H., (Central Mining & Investment Corporation). Feb. 24, 1919. Gold and other metals, depositing; electrodes; electrolytes, treating non-chemically.-Cyanide and other solutions to be passed through a finelyporous cathode are first freed from dissolved atmospheric oxygen, in order to avoid the necessity of the use of a voltage which causes evolution of hydrogen and disintegration of the cathode. Mechanical, chemical, or electrolytic means may be employed for this purpose. As shown, the solution runs from a tank 1 to a sprayer 6 in the upper part of a tank 2, which is exhausted of air by a pump 3 through a pipe 4 of greater height than the barometric column. A float 7 actuates a valve 8 to control admission of the solution. Another pump 9 extracts the air-freed solution and delivers it to the electrolyzer 10. In another method, the solution is preliminarily electrolyzed to reduce the dissolved oxygen and precipitate part of the metal, and is then run to the main depositing-cells. The permeable cathode may be composed of a cake of graphite on a layer of cloth or paper, or of paper pulp combined with graphite as described in Specification 143,619. It may be supported by a permeable metallic sheet. Specifications 11336/15 and 19669/13 are also referred to.
Patent GB-584846-A (GB)
Title: Improvements in refrigerating machines of the absorption type
IPC: F25B15/10
Filed: 1941-04-10
Abstract: 584,846. Refrigerating. DE VORST N. V. April 10, 1941, No. 4812. Convention date, Feb. 21, 1940. [Class 29] Absorption systems.- In a continuous-cycle inert gas system in which the evaporator 12 is connected to the absorber 20, 21 directly by a downcomer conduit 40, 41 the absorber is disposed laterally of the evaporator and is in open communication with the upper end of the downcomer conduit by a U-tube 44, 45, 47 and with the lower end of the downcomer by a pipe.46 so as substantially to prevent reverse flow of the inert gas to the evaporator. The evaporator may be fitted with overlapping baffles 39, and the absorber may comprise air-cooled tubes. The U-shaped pipe extends into the upright part 41 of the downcomer conduit and opens therein above the connection of the sloping part 40 of the downcomer. The height of the bottom of the U-shaped pipe above the connection 46 of the downcomer with the absorber should not exceed three inches, and the slope of the inclined part of the downcomer should not be less than 6‹ to the horizontal. The generator 3 includes a part 30 separately heated to effect vapour lift in a pumping pipe 32, and rectifier baffles 6 may be located at the top of the generator. Specifications 390,181 and 422,159 are referred to. The Specification as open to inspection under Sect. 91 comprises also a form in which the U-tube is omitted, and a sloping downcomer connects the evaporator 12 to the pipe 46 and is provided with baffles at its ends which restrict upward flow of inert gas, and a further form, Fig. 3 (Cancelled), in which the generator 3 is fitted with an internal bell 30. This bell is connected by a lift pipe 32 with a vessel 33 from which vapour' returns by a pipe 37 to the generator. The absorber is of modified shape and provided with ribs. The evaporator may be fitted with a spiral channel. This subject-matter does not appear in the Specification as accepted.
Patent GB-266533-A (GB)
Title: Manufacture of diazotizable azo-dyestuffs and intermediate products therefor
IPC: C09B35/18
Filed: 1926-02-19
Abstract: 266,533. Chemical Works formerly Sandoz, and B÷niger, M. Feb. 19, 1926. Addition to 252,957. Pyrazolones. - 3<1>-nitro-4<1>-methyl-5<1>-sulpho-1- phenyl-3-methyl (or carboxy)-5-pyrazolones are obtained by condensing 2-nitro-4-tolylhydrazine- 6-sulphonic acid (prepared in the usual manner from 4-amino-2-nitrotoluene-6-sulphonic acid, which is formed on partial reduction of 2 : 4- dinitrotoluene, the latter body being obtained by sulphonating 4-nitrotoluene and nitrating the product) with ethyl acetoacetate or ethyl oxaloacetate and hydrolyzing the products. The corresponding amino bodies are obtained on reducing with iron borings in acid solution. Disazo dyes are obtained by combining one molecule of the tetrazo-compound of a. p-diamine of the diaryl series with two molecules of one of the above aminopyrazolones, or with one molecule of one of the aminopyrazolones and one molecule of another component, e.g. an aminonaphthalene sulphonic acid or an aryl-o-oxycarboxylic acid. The same dyestuffs may be obtained by using the nitropyrazolones as components and reducing the nitro group in the products. The products dye cotton directly in various shades which can be diazotized and developed on the fibre. In examples, (1) tetrazotized dianisidine is coupled with two molecules of the aminopyrazolone carboxylic acid; the product dyes unmordanted cotton in heliotrope shades, which become very fast to washing without material change in tone when diazotized and developed with #-naphthol, (2) tetrazotized benzidine is coupled with one molecule of salicylic acid and with one molecule of the above aminomethylpyrazolone; the product dyes cotton directly in orange shades, which become more reddish when diazotized on the fibre and developed with #-naphthol, and (3) tetrazotized tolidine is coupled with one molecule of the nitromethylpyrazolone and with one molecule of 1 : 6 or 1 : 7 naphthylamine sulphonic acid and the nitro dye formed is reduced with sodium sulphide ; the product dyes cotton directly in redbrown shades which change to chestnut-brown when diazotized and developed with #-naphthol.
Patent GB-928715-A (GB)
Title: Improvements in or relating to phase controlled sequential gripping device, for example, for tubes
IPC: F16L19/10
Filed: 1962-02-09
Abstract: 928,715. Pipe &c. couplings. CRAWFORD FITTING CO. Feb. 9, 1962 [June 29, 1961], No. 5010/62. Class 99(1). A gripping device for a member 22, e.g. a pipe, rod or thermocouple, comprises a coupling body 12 having a passageway 16 for receiving the member and provided with a first coaxial, rearwardly opening, generally frustoconical camming mouth 24, and a front ferrule 42 in the form of a cylindrically hollow, right circular, forwardly converging, conical frustum providing a coaxial bore 48 and a tapered external surface 46, that surface having an axial length greater than that of the mouth 24 and defining an included angle less than that of the mouth and terminating at the forward end with a curved apical zone 52 seated against the mouth 24 in initial non-pressure contact along a line adajcent but spaced rearwardly from the smaller end of the mouth, the ferrule being provided at the rearward end thereof with a coaxial, rearwardly opening, frusto-conical camming mouth 60. There is also a back ferrule 44 in the form of a resilient annular sleeve providing a coaxial bore 62 and having a wall thickness less than the greatest wall thickness of the ferrule 42, the forward end of the ferrule 62 having an external, forwardly converging, frusto-conical surface received within the mouth 60 and formed on an included angle not greater than that of the mouth 60 and terminating at the forward end with a curved apical zone 68 seated in initial non- pressure contact along a line adjacent to but spaced rearwardly from the smaller end of the mouth 60. The rearward end of the back ferrule is provided with an annular, radially outwardly extending flange 70 providing a coaxial frusto-conical, rearwardly converging back face 72, the flange and the surface 64 of the ferrule being joined by a cylindrical mediate section 63. A nut 30 for threadedly engaging with the body 12 and provided with a coaxial, internal, rearwardly converging, frusto-conical thrust surface 36 disposed in axial spaced opposition to the mouth 24 mates with the face 72 of the flange of the ferrule 44.
Patent GB-557694-A (GB)
Title: Improvements in or relating to the jointing of flexible sheet material in the construction of flexible containers such as fuel tanks for aircraft
IPC: B64D37/06
Filed: 1942-04-16
Abstract: 557,694. Tanks ; hallow-ware ; sewing. BRITISH UNITED SHOE MACHINERY CO., Ltd., and RICKS, F. April 16, 1942, No. 5020. [Class 69 (i)] [Also in Groups VII and XVII] In the construction of flexible containers, such as fuel tanks for aircraft, joints between sheets of material are formed by the aid of a fillet at the inside surface of the work, the margins of the sheet material being overlapped and sewn together from the outside by a seam which passes through the margins and the fillet but is not exposed at said inside surface. Pieces 1, 3, of material, preferably comprising three layers of fine cambric bonded together with a petrol-resistant synthetic rubber such as Thiokol and having a coating of similar substance at the inner surface 1 b, have their margins overlapped and a preferably substantially triangular fillet 5, preferably of synthetic rubber such as Thiokol with a surface layer 7 and/or internal reinforcement of fabric, is placed adjacent the overlap, petrol-resistant adhesive securing the parts 1, 3, 5 together; a seam 9 of sewing is then inserted. A further strip 11 of Thiokol &c. may be secured by adhesive to the inner surface of the fillet 5 and overlap the edges of the fillet and the piece 3. The outside surface of the joint is then preferably painted with shellac &c. varnish. The container is preferably built up on a collapsable form of wood &c. spars and may be held thereto by a light adhesive. The seam 9 is preferably made by means of a curved hooked needle sewing machine with internal and external work supporting means as in Specification 198,430, [Class 112]. Specification 28331/06, [Class 66], also is referred to.
Patent GB-961847-A (GB)
Title: Slow wave filter helix structure
IPC: H01J23/26
Filed: 1961-02-10
Abstract: 961,847. Travelling wave tubes. STANDARD TELEPHONES & CABLES Ltd. Feb. 10, 1961 [Feb. 11, 1960], No. 5046/61. Heading H1D. A slow wave filter helix structure comprises a metal helix 4 of uniform pitch, and parallel longitudinal insulating rods 2 rigidly connected to the helix by sheet metal clamps 3 which are periodically arranged in groups and successively spaced along the rods 2 in a helical pattern with a pitch opposite to that of the helix 4 so as to load the helix to provide predetermined filter characteristics. The clamps 3 may be replaced by radially extending pins brazed to the helix and extending through holes drilled in the rods; in either case six insulating rods are preferably provided. The loaded helix is arranged to suppress spurious responses such as backward wave oscillations. Lossy material 11, such as a colloidal solution of graphite, may be sprayed over the central portions of the rods to attenuate reflected waves.
Patent GB-588585-A (GB)
Title: Improvements in or relating to valves for the distribution of fluids
IPC: F15B13/06
Filed: 1945-02-28
Abstract: 588,585. Fluid-actuated valves. BENDIX AVIATION CORPORATION. Feb. 28, 1945, No. 5052. Convention date, March 11, 1944. [Class 135] A valve for maintaining an equal rate of flow of fluid to two outlets from a single inlet, has the inlet 24 connected to outlets 26, 27 by means of venturi passages 61, 62, the pressures at the throats of which are communicated through passages 65, 67 and 66, 68 to chambers 53 and 54 at either end of a spool valve 36, which controls the outlets 26, 27 by varying the fluid passages between shoulders 45, 46 on the valve and lands 38a, 39a in the housing. The valve is shown in a hydraulic system having a reservoir 12, pump 14, relief valve 16, control valve 18 and hydraulic motors 20, 21, the arrangement being such that should one of the motors encounter greater resistance to movement than the other, whereby the flow to the former motor is reduced, the pressure at the throat of the corresponding venturi is increased, thereby increasing the pressure in one of the chambers 53, 54 to move the spool valve in a direction to equalise the flow.
Patent GB-180298-A (GB)
Title: Improvements in blind stitch sewing machines
IPC: D05B85/06
Filed: 1922-02-22
Abstract: 180,298. Dearborn, C. A. May 17, 1921, [Convention date]. Blind-stitching machines.-In a blind-stitch machine of the type described in Specification 4474/06 and comprising a feed bar 133 driven by an eccentric 136, 137 and a looper 25, 75 actuated by a crank 19, inclined stud 20, sleeve 21, and yoke 22 pivoted to the sleeve, the looper bar 25 connected by a universal joint to a rocking arm as described in Specification 19556/00 is mounted adjacent to and outside of the feed-bar. The arm comprises two plates 50, 51 with spheroidal recesses adapted to be clamped upon the spherical bars 38 on the bar 25 and pivoted on a stud 31 eccentrically mounted in an adjustable block 32. The plates 50, 51 are cut away at 62 to allow a closer approximation to the bar 133. The looper proper is of stamped sheetmetal of U-section and is connected to the bar by a screw 77 engaging a slot 76.
Patent GB-1017864-A (GB)
Title: Improvements relating to the dyeing of organic fibres and to impregnating liquors for use therein
IPC: D06B17/02
Filed: 1964-02-07
Abstract: Organic fibres are dyed by impregnating them below the drawing temperature of the dye with an aqueous solution or dispersion of a non-cationic dyestuff, which may be thickened, and which contains amides of saturated, aliphatic monocarboxylic acids having 8-14 C atoms with primary or secondary amines having at least one hydroxyalkyl of 1-4 C atoms or alkoxyalkyl group each alkyl of which having 1-4 C atoms, sulphated surface active polyglycol ethers or the soluble salts thereof, the weight ratio of the acid amides to the sulphated polyglycol ethers being 2 : 1 to 1 : 2 and, optionally, other additives, the pH being 2-10 thereafter finishing with a heat treatment.  The preferred acid amides are bis-(w-hydroxyalkyl)-amides of said acids, preferably coconut oil fatty acids.  The preferred polyglycol ethers are derived from fatty alcohols of 8-14 C atoms, e.g. lauryl alcohol, or from higher alkylated phenols, e.g. p-nonyl-phenol, and 1-20, preferably 2-3, ethylene oxide residues. The said mixture of surfactants may also contain isopropanol or a b -alkoxy-ethanol. The dye composition may further contain an acid, a metallising agent (when metallisable dyes are used) and bactericidal and fungicidal compounds.  The fibres to be dyed are especially polyamides, e.g. wool, silk and nylon but may also be of cellulose dito tri-acetate, aromatic polyesters, acrylonitrile and methacrylonitrile polymers and copolymers, polyurethanes, polyolefins and polyvinyl alcohol or blends thereof.  Among the suitable dyes are acid, disperse and reactive dyes which may contain metal atoms or be metallisable.  The dye liquors are best applied by printing or especially padding and the heat treatment, which is preferably treatment with neutral saturated steam or in an acid "shock" bath at 80-98 DEG C., is applied without intermediate drying.  Many examples are given.
Patent GB-692121-A (GB)
Title: Improvements in or relating to aircraft propeller installations
IPC: B64C11/44
Filed: 1951-03-05
Abstract: 692,121. Variable-pitch propellers. UNITED AIRCRAFT CORPORATION. March 5, 1951. [May 26, 1950] No. 5245/51. Class 114. Electrical connections to the de-icing units in the blades are made bv brushes 140, 142, 144 engaging slip rings 150, 152, 154 on the hub, current thus passing in series through radially opposite blades. The brushes are carried in a cup like unit 80, the wall 100 of which receives a plug-in adaptor 26 and so prevents the unit 80 from rotating with the hub. The ends of the adaptor 26 receive plug on connections from the generator and from the variable pitch control unit. Specification 692,119 is referred to.