baber/WOPTO huggingface dataset:
Patent GB-1379644-A (GB)
Title: Control circuits for oil and gas fired burner assemblies
IPC: F23N5/12
Filed: 1972-07-04
Abstract: 1379644 Burner control circuits LANDIS & GYR AG 4 July 1972 [15 July 1971] 31192/72 Heading F4T A control circuit for an oil or gas fired burner comprises an igniter 9, an electromagnetic control means 23 for controlling fuel flow to the burner, and a flame relay 6 arranged to be deenergized when a flame is present, relay 6 having a set of contacts 19 which when the relay is energized pass current to control 23 via a first path including a positive temperature coefficient resistor 27, the current initially being sufficient to pull in control 23 but then dropping, due to heating of resistor 27 by the current therethrough, to a value below the hold-in current of control 23, contacts 19 passing current to control 23 via a second path 26 when the relay 6 is deenergized and the second path supplying a current which is only sufficient to hold-in control 23 but not to pull it in. Current is passed to the circuit via a controller 3 responsive to a demand for heat. A motor 4 supplies air to the burner and, in the case of oil burners, drives a liquid fuel pump. Control 23 may be the coil of a relayhaving contacts operating a solenoid fuel valve, or may be the coil of said valve. On start-up relay 6 is energized and closes a contact S to energize a high voltage igniter 9, giving sparks at electrodes 12, 13, and energizes control 23 via resistor 27. When a flame 14 is sensed relay 6 is deenergized to switch off igniter 9 and change make-before-break contacts 19 over to the holdin current path comprising a resistor 26. If ignition does not give rise to a flame, current continues to flow to control 23 via resistor 27 for a limited time after which resistor 27 has heated to a state in which the current is not sufficient to hold in control 23 thus interrupting fuel supply. If the flame is extinguished during operation then amplifier 21 again energizes relay 6 to energize igniter 9 and the circuit operates as above in accordance with whether or not the flame is restored. If control 23 is a relay, further contacts may be incorporated in a lead 28 to motor 4 and igniter 9 to thereby also switch off said motor when relay 23 is cut out. The flame may be sensed either by ionization currents to electrode 12 or by a visible or ultra violet light sensor. The operating coil of control 23 may be a D.C. type, a rectifier being placed in series therewith.
Patent GB-1055976-A (GB)
IPC: F16D55/226
Filed: 1964-08-04
Abstract: 1,055,976. Disc brakes; brake cylinders. SOC. ANON. D.B.A. Aug. 4, 1964 [Aug. 3, 1963], No. 31344/64. Headings F2E and F2F. In a spot-type disc brake including a pair of opposed pads located in recesses in respective limbs of a fixed support straddling a portion of the disc. and a U-shaped stamping which surrounds the pads and contains at least one cylinder for applying one of the pads, the stamping is formed with a lateral wall extending parallel to the disc against the inner face of which the closed end of the cylinder takes abutment. As shown, the stamping 2 constitutes a floating housing of box form having lateral walls 19, 20, joined integrally by a top wall 21, and also transverse walls 13, 14. Balls 15 retained by links 7 pivoted at 8 to the fixed support 4 retain the stamping and guide it for axial movement, the links being releasably held in operative position by removable pins inserted between limbs 5 and 6 of the support and engaging apertures in the links. Retaining springs 41 pass over-centre when the links are swung outwardly to remove the stamping for access to the enclosed pads 16, 17 which are guided in recesses 18 in the limbs 5, 6. The cylinder 22 enclosed within the stamping has its closed end abutting wall 20 of the stamping and is retained by a nut 31 engaging a stud 28 passed through an aperture in the wall 20. It includes an integral hollow portion in which is screwed an inlet member 37 for hydraulic fluid, the latter having a reduced diameter portion 38 provided with both an axial bore 39 and radial bores 40 which assist bleeding of the brake. The piston 24 has a skirt 25 engaging a friction ring 26 fitted with play between a shoulder 27 on the pin 28 and a stop ring 29 fixed to the end of the pin, to provide automatic wear adjustment. A projection 30 on the piston engages an aperture in the backing plate of pad 17 and applies the latter to the disc 1, the other pad 16 being applied by reaction through the stamping. Reinforcing ribs (Fig. 4, not shown) may be provided on the top wall 21 of the stamping.
Patent GB-1471995-A (GB)
Title: Weighting surface wave interdigital transducers by withdrawing electrode fingers
IPC: H03H9/42
Filed: 1974-07-16
Abstract: 1471995 Surface wave transducers TEXAS INSTRUMENTS Inc 16 July 1974 [10 Aug 1973] 31437/74 Heading H3U An interdigital surface wave transducer with a desired impulse response is provided by omitting one or more selected fingers from an otherwise conventional transducer having fingers of equal length and width and having an impulse response which has the same zerocrossings as the desired impulse response and which, if the fingers were not omitted, would have an envelope function which was everywhere greater than or equal to that of the desired impulse response. In a method of determining which fingers to omit, fingers are omitted so as to render the actual envelope function approximately equal to the desired function along the transducer. The finger spacing may be uniform or may correspond to a linear FM chirp. The transducer may comprise split fingers.
Patent GB-786924-A (GB)
Title: Photographic emulsions having increased sensitivity to x-ray and gamma ray radiation
IPC: G03C1/08
Filed: 1955-11-03
Abstract: 786,924. Photographic emulsions. GENERAL ANILINE & FILM CORPORATION. Nov. 3, 1955 [Nov. 24, 1954], No. 31486/55. Class 98(2) A photographic emulsion comprises silver bromide grains dispersed in a colloid carrier (e.g. gelatin, polyvinyl alcohol, or a water-dispersible cellulose organic ester, polyamide, hydroxyethyl cellulose, modified polyvinyl alcohol, or partially hydrolyzed polyvinyl acetate), the grains containing from 0.001 to 0.2 mol per cent of cadmium based on the quantity of silver present in the emulsion. The emulsion has an increased sensitivity to X- and gamma-rays, but a reduced sensitivity to visible light. The cadmium ion can be introduced in the presence of a colloid carrier as a water soluble salt such as cadmium chloride or bromide mixed with alkali metal bromide solution to which is added the silver nitrate solution to precipitate the silver bromide. Alternatively, a non-halide water soluble cadmium salt such as the nitrate or acetate may be mixed with the silver nitrate. In Example 1, a solution of 74 grams of silver nitrate and 0.05 gram of cadmium nitrate in 400 ccs. of water at 68C. is slowly added with agitation to a solution, also at 68C. of 60 grams of potassium bromide and 6 grams of gelatine in 150 ccs. of water. 60 grams of gelatin are added and the mixture maintained at 68C. with agitation for 20 minutes. The chilled and shredded emulsion is washed until the bromide ion concentration is 100 mgms. per kilogram of liquid emulsion, the remelted emulsion is ripened for 20 minutes at 60C., saponin and formaldehyde are added, and the emulsion is coated on cellulose ester film. A metol-hydroquinone developer for this film is specified. In Example 2, polyvinyl alcohol is used as the emulsion binder and cadmium acetate is added to .the silver nitrate solution, the potassium nitrate formed on precipitation of the silver bromide being removed by dialysis. In Example 3, the purification by dialysis is replaced by precipitation with ammonium sulphate and washing. In Example 4, gelatin is used as the emulsion binder and cadmium chloride is added to the gelatin-potassium bromide solution. The silver bromide emulsion may be replaced by a silver bromiodide emulsion, but at least 90 per cent by weight of the silver halide should be silver bromide. The emulsion may contain sensitizing agents, and may contain a colour coupler and be processed by colour development. The saponin may be replaced by isopropylnaphthalesesulphonic acid.
Patent GB-781543-A (GB)
Title: Improvements in and relating to phenazine derivatives
IPC: C07D241/46
Filed: 1955-11-04
Abstract: The invention comprises substituted phenazines of the general formula <FORM:0781543/IV (a)/1> wherein Ar1 represents a phenyl radical which is substituted by alkyl or alkoxy groups having at the most 4 carbon atoms or by halogen atoms, and the mineral acid salts thereof, and the preparation of compounds of the general formula <FORM:0781543/IV (a)/2> wherein Ar represent a phenyl radical which may be substituted by alkyl or alkoxy groups having at the most 4 carbon atoms or by halogen atoms, by reacting mineral acid salts of N-aryl-o-phenylene diamines of the general formula <FORM:0781543/IV (a)/3> wherein Ar has the above significance in an aqueous solution with benzoquinone to form the required mineral acid salt and if desired liberating the free base in the usual way.  From 1 to 2 mol. of benzoquinone may be used per mol. of N-aryl-o-phenylene diamine reactant.  A moderately elevated temperature such as 50 DEG  to 70 DEG  C. may be used.  The free bases are preferably liberated from the mineral acid salts by means of alcoholic alkali.  In the examples the following compounds are prepared: 2-amino-3-phenylimino-3,5-dihydro-5-phenyl-phenazine, and the hydrochloride, and bis-metho-methyl sulphate thereof, and the corresponding 3-p-anisylimino-compound and the hydrochloride and bis-metho-methyl sulphate thereof, and the corresponding 3-p-tolyl-, 3-o-anisyl-, 3-p-ethoxyphenyl-, 3-p-iso-propoxyphenyl- and p-chlorophenyl-imino compounds.  Other reactants referred to which may be used to prepare compounds in addition to those referred to above are N-xylyl-o-phenylene - diamine, N - (4 - isobutoxyphenyl) - o - phenylene - diamine and N - (4 - bromo - phenyl)-o-phenylene-diamine.
Patent GB-427046-A (GB)
Title: Electric flatiron
IPC: D06F75/36
Filed: 1933-11-13
Abstract: 427,046. Electric hand-irons. HAMMERBAK, A. W. E., 16, Kongedybet, Copenhagen. Nov. 13, 1933, No. 31636. [Class 138 (ii)] The sole plate 1 of an electric hand-iron is provided with an upstanding central portion 2 wherein slots 3 are formed which extend downwardly from the top of the central portion nearly to the ironing surface of the sole plate. Heating bodies are inserted in the slots and are held therein by friction. A packing 5 of heat insulating material is inserted between the sole and cover plate 6 which is filled with light heat-insulating material such as infusorial earth.
Patent GB-1456328-A (GB)
Title: Bucket assembly for material handling apparatus
IPC: B66C1/62
Filed: 1974-07-17
Abstract: 1456328 Grab buckets; unloading ships DRAVO CORP 17 July 1974 [7 Aug 1973] 31708/74 Headings B8H and B8E The hold 12 of a ship 16 is unloaded by means of a scissors-type bucket 21 which is suspended from a trolley 50 which is movable along a boom 17 mounted on a vertical wheeled support structure 11, Fig. 1. The bucket is suspended by means of cables 20, Fig. 3, which are attached at their upper ends to a support frame 19 on which is mounted a sleeve 23 about which a hold line 45 passes, the latter being attached at one end (its dead end) to the trolley while its other (live) end is attached to a hoist drum 24 located in a part 25 of the support structure 11. The bucket, which is of the clam-shell type, comprises two pairs of arms 31, 31a (only one pair shown), each pair being pivotally connected together at 33, the upper ends of the arms having sheaves 35, 35a, 38, 38a, (36, 36a) rotatably mounted thereon about which a single close line 39 is reeled, Fig. 7 (not shown), the latter being anchored at its dead end, and its live end 40 is wound on a hoist drum 42 located in the part 25, rotation of the drum 42 effecting the opening and closing of the bucket which includes two jaw portions 32. The sheave and close line arrangement of Fig. 7 (not shown) is just one of several arrangements, other such arrangements being shown in Figs. 8-13 (not shown).
Patent GB-1190437-A (GB)
Title: Multi-Layered Stuctures
Inventor: ACCOUNTIUS OLIVER E
IPC: C04B35/56
Filed: 1967-07-10
Abstract: 1,190,437. Laminates. NORTH AMERICAN ROCKWELL CORP. 10 July, 1967 [22 July, 1966], No. 31711/67. Addition to 1,156,041. Heading B5N. [Also in Division C1] In a coherent multilayered structure, each layer consists of pyrolysed para-polyphenylene, or a carbide resulting from the reaction of a material with para-polyphenylene on pyrolisis thereof, or a pyrolysed mixture of para-polyphenylene with an inert filler, and one layer at least is of a different composition from the other layer or layers. The structure may be formed by forming a plurality of successive layers of para-polyphenylene powder, one or more of the layers containing an inert filler, or a material which will carbonize in situ on pyrolysis of the para-polyphenylene and being of a different composition from the other layer or layers, compacting the layers to form a coherent multilayered body, and heating the compacted body to a temperature at least sufficient to pyrolyse the para-polyphenylene. The powder layers may be inserted in turn into a die and all compacted at once or the layer(s) may be compacted within the die after the insertion of each layer, or each layer may be compacted in a separate die and roughened before assembling the layers and compacting them together. The inert filler may be graphite powder, boron, a metalloid, a metal, a carbide, or a silicide. The reactive material may be silicon, titanium, zirconium or molybdenum which may be present in a stoichiometric amount required to form the carbide thereof at the pyrolysis temperature. In one example the structure comprises an oxidation resistant layer of silicon carbide and a heat conductive layer comprising graphite and pyrolysed para-polyphenylene. In one example, the layers form the core and annular shell of a cylinder.
Patent GB-341542-A (GB)
Title: Improvements in pulps comprising fibrous material and heatplastic waterproofing material, and in the method for manufacturing the same
IPC: D21H17/61
Filed: 1929-10-18
Abstract: 341,542. Waterproof paper and board. RICHARDSON CO., Wyoming Avenue, Lockland, Ohio, U..S.A. Oct. 18, 1929, No. 31746. Convention date, Nov. I, 1928. [Class 96.] A heat plastic waterproofing material such as bitumen, rubber composition, or synthetic resin is incorporated into paper pulp without the use of an emulsifying agent by distributing it whilst in a molten or liquid form, in the absence of sufficient water as would form a circulating medium. Other suitable substances are asphalt, waxes, gums, partially oxidized drying oils, and blown oils ; the process also provides a method for sizing paper with sodium silicate, glue and other waterproofing agents. The product obtained can be used as roofing felt. Mineral fillers can be used together with the binders and sizes. In an example wet sheets of paper or pulp are intimately mixed with a fluid or semi-solid binder in a kneading machine such as the Werner-Pfleiderer mixer, the temperature being kept sufficiently high to prevent solidification of the bitumen or other material. This preliminary mixing operation results in a discontinuous mass of fibre and bitumen, and providing the fibres are kept moist, it can readily be broken down to a water pulp by the addition of water. The mass is transferred to a paper mill beater where the nodules or lumps are combed out and a smooth uniform pulp obtained. If desired, the pulp may be passed through one or more refining engines or Jordans, and thence to the paper-making machine. Hot calendering or pressing is advantageous to develop the full strength of the finished sheets,
Patent GB-340071-A (GB)
Title: A volume control for wireless receiving systems
IPC: H03G3/14
Filed: 1929-10-18
Abstract: 340,071. Gramophone Co., Ltd., (Victor Talking Machine Co.). Oct. 18, 1929. Coupling aerial and detector circuits.-The energy applied to the receiver is controlled by means of two graded resistances capable of simultaneous variation in opposite senses, one resistance being in series and the other in shunt with the input. The aerial circuit, 4, 5, 6, is coupled to the receiver 1 through a transformer 3, and includes a series of graded resistances 8 - - 15, the optinium values of which are given. As the contact 16 is moved towards the earth terminal, the resistance in series with transformer 3 increases by progressively greater steps until the mid-point is reached when the steps progressively decrease; the resistance in parallel with the transformer is simultaneously reduced by progressively greater steps until the mid-point is reached when the steps decrease. Theoretically, the resistance values should vary in accordance with a logarithmic function.
Patent GB-1195243-A (GB)
Title: Water-Insoluble Monoazo Compounds and Textile Materials Dyed therewith
Inventor: WEAVER MAX ALLEN
IPC: D06P1/18
Filed: 1967-07-11
Abstract: 1,195,243. Sulphonamides. EASTMAN KODAK CO. 11 July, 1967 [28 Oct., 1966], No. 31756/67. Heading C2C. [Also in Division C4] Compounds of formulµ wherein R<SP>1</SP> is phenylene, R<SP>2</SP> is alkyl, cycloalkyl or phenyl, R<SP>3</SP> is alkylene, R<SP>4</SP> is alkyl, cycloalkyl or phenyl, R<SP>5</SP> is substituted alkyl or cycloalkyl or phenyl which may be substituted, R<SP>6</SP>, R<SP>7</SP> and R<SP>8</SP> are H or alkyl, R<SP>9</SP> and R<SP>10</SP> are H, halogen, alkyl, alkoxy or alkanoylamido and R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP> and R<SP>4</SP> may be further substituted, the compounds being free of acid water-solubilizing groups; and their preparation are described. They are used as coupling components in the preparation of azo dyes (see Divisions C4-C5). In examples: (A) N-ethyl-N-(2-methanesulphonamido) ethyl-m-toluidine is condensed with acrylonitrile to yield N-ethyl-N-[2-(N<SP>1</SP>-methanesulphonyl - N<SP>1</SP> - betacyanoethyl) amino] - ethylm-toluidine; (B) the product of (A) is hydrolysed with H 2 SO 4  to give N-ethyl-N-[2-(N<SP>1</SP>- methanesulphonyl - N - beta - carbamoyl - ethyl) amino] - ethyl - m - toluidine; (C) N - beta - chloroethyl - N - ethyl - m - toluidine, N - 2 - hydroxyethylmethanesulphonamide, K 2 CO 3  and dimethylformamide are refluxed together to give N-ethyl-N-[2-(N<SP>1</SP>-methanesulphonyl - N<SP>1</SP> - beta - hydroxyethyl) amino]- ethyl-m-toluidine; (D) 1-(2-chloroethyl)-1,2,3,4- tetrahydro - 2,2,4,7 - tetramethyl - quinoline is reacted as in (C) to yield 1-[2-(N<SP>1</SP>-methanesulphonyl - N - betahydroxyethyl) - amino] - ethyl - 1,2,3,4 - tetrahydro - 2,2,4,7 - tetramethyl - quinoline. Many further compounds are specified.
Patent GB-998876-A (GB)
Title: Servo system and mechanism with grounded rotor capacitor
IPC: G05D3/14
Filed: 1961-09-05
Abstract: 998,876. Indicating liquid level. SIMMONDS PRECISION PRODUCTS Inc. Sept. 5, 1961 [Sept. 6, 1960], No. 31925/61. Heading G1N. A servo mechanism consists of a disc rotor acted on by a reference stator field, and a stator field energized by the out-of-balance field. The periphery of the rotor carrying the movable element of a variable capacitor. As shown in Fig. 1, and, exploded, in Fig. 2, field windings on cores 59, 60 are supplied one with the reference signal and one with an error signal to rotate eddy current disc 48. The disc carries on its periphery a strip 65 of variable width which passes between an arcuate fixed plate 68 mounted in the bottom of the housing and a further electrode constituted by two curved parts 74, 78, one on each side of the eddy current disc and connected together. The effect of inserting an increased width of strip 65 between the electrode 68 and electrodes 74, 78 is to reduce the capacity between them, the spindle of the device is mounted in P.T.F.E. bearings and is attached to a spiral spring 85 not sufficiently strong to affect the indication materially but strong enough to restore the rotor to a datum position if the supply fails. At the same time this spring connects the movable plate to earth. Carried on the end of the shaft is a Y-shaped wire 100 carrying a flag which, if the supply fails, is visible through a hole in the disc. Legs 99, 98, are provided on the wire Y and engage strips to prevent the discontinuity 66 in the variable condenser plate from entering the space between the fixed plates. Fixed magnets 91, 92 provide damping of the movement of the disc to prevent it overshooting. Liquid level indicating system. Change of liquid level between plates 17 varies the capacity between them so as to increase the current passing through it to an amplifier 23. As a result, an unbalance signal drives motor 24 to operate a motor and indicator of the type described above and to insert or remove an arcuate plate moving between final plates 28, 29 and 27. Insertion of the moving plate reduces the capacity between the final plates. Hence the currents feeding amplifier 23 are again rebalanced. Potentiometer 20 sets the zero indication of the device when the tank is empty and potentiometer 33 sets the maximum when it is full. Specification 997,964 is referred to.
Patent GB-1361832-A (GB)
Title: Apparatus for controlling the velocity of motion of a supporting  beam such as an extensible mast ladder or the like
IPC: B66F11/04
Filed: 1971-07-07
Abstract: 1361832 Luffing arm apparatus CARL METZ GmbH 7 July 1971 [7 July 1970] 31952/71 Heading B8H [Also in Division E1] A mobile extension ladder or other rescue apparatus with a telescopic boom, or a crane with a variable length arm, is provided with apparatus for modifying the velocity of extension, slewing or raising of the extensible arm, boom or ladder in dependence on the relationship between the tilting moment at any instant and a pre-defined tilting moment which is less than the critical tilting moment. The moment is measured by a balance 13 and when it reaches the pre-defined value an electric or other equivalent circuit (Fig. 2) provides an automatic lowering of the velocity range of at least one of the motions. In one embodiment, an extra resistor is added to the control circuit so that all motions except retraction of the ladder are slowed. When the critical moment is reached, all movements, except such retraction are prevented. Before the pre-defined moment is reached, a control pulse I 601 alone exists, and a programme transmitter 305, in the pilot control unit, remains stationary and all motions can be carried out up to their maximum velocities. When the pre-defined moment is exceeded, pulses I 601 and I 602 co-exist, and the transmitter 305 is driven to the right by a motor M, and an extra resistance is added to the circuit indicated at I 170, and hence into each control circuit except that relating to the retraction of the boom or arm (I 116). This movement is stopped by a sensing element 310 mounting a cam. The movement is reversed by a change back to I 601 alone, but continues if the change is to I 602 alone, whereupon eventually contact 304 is made, circuit I 170 is interrupted, and all control circuits except I 116 are blocked.
Patent GB-621120-A (GB)
Title: Improvements in or relating to helicopter air screws
IPC: B64C11/00
Filed: 1945-11-27
Abstract: 621,120. Helicopter airscrews. BONDI, J. W. Nov. 27, 1945, No. 31981. [Class 4] A helicopter airscrew 1 is mounted in the substantially cylindrical lower air outlet of an air duct 2 flared outwardly at the air inlet above the airscrew. The axis 3 of the airscrew 1 may be adjusted angularly with respect to the axis of the airduct 4, or vice versa, or the common axis of the airscrew and airduct may be adjusted angularly with respect to the helicopter frame. The duct 2 may be formed of parts 6 secured to the airscrew blades 7 and the adjacent ends 8 of parts 6 may overlap or be spaced apart. The airduct may be expanded or contracted in the manner of a photographic camera diaphragm.