baber/WOPTO huggingface dataset:
Patent GB-649612-A (GB)
Title: Improvements in and relating to amplitude-modulators for electric oscillations
IPC: H03C1/06
Filed: 1948-06-22
Abstract: 649,612. Valve modulating and amplifying circuits. BRITISH BROADCASTING CORPORATION, PEACHEY, F. A., and RUSSELL, C. GUNN-. June 22, 1948, No. 16796. [Classes 40 (v) and 40 (vi)] An amplitude modulator comprises an amplifier to which oscillations to be modulated are applied at 10, 11, the amplifier having a negative feed-back circuit 18, 19, 24, 25 as shown, with oppositely poled rectifiers 22, 23, in series with resistors 20, 21 shunted across the resistor 19. A unidirectional modulating potential is applied at 26, 27 across the resistors 20, 21 and during variable portions of the carrier period, when the amplitude of the carrier across the resistor 19 successively exceeds the instantaneous value of the modulating voltage across the resistors 20 and 21, the negative feed-back is increased due to the rectifiers 22, 23 conducting, resulting in modulated output at 12, 13 of the amplifier, its gain being the variable quantity where R equals either the resistance of resistor 19 alone, or of the latter in parallel with resistor 20 or 21 when the rectifier 22 or 23 is conducting. The modulation is therefore linear. If the modulating unidirectional voltage exceeds the carrier amplitude across resistor 19 no further increase in the amplitude of the modulated carrier results, so that the modulator acts as a limiter. The arrangement may be used as a D.C./A.C. amplifier or a D.C. amplifier if the output is rectified.
Patent GB-1178574-A (GB)
Title: Liquid Damper for Measuring Instruments
Inventor: EFIMENKO VIKTOR IVANOVICH
IPC: G01D11/12
Filed: 1967-04-12
Abstract: 1,178,574. Viscous fluid dampers. KRASNODARSKY ORDENA TRUDOVOGO KRASNOGO ZNAMENI ZAVOD ELEKTROIZMERITELNYKH PRIBOROV. 12 April, 1967, No. 16798/67. Heading F2S. [Also in Division G1] A liquid damper for measuring instruments includes a movable element 1 and a stationary element 2, these two elements having projecting surfaces 3, 4 arranged to face each other to define a space 5 therebetween, these surfaces being shaped so that the space is of variable width, and this space having a fluid filling a part of the space, the amount of fluid being such as to remain within said space even when the movable element and the stationary element come in contact with each other. The surfaces 3, 4 are in the form of annular beads having a curved surface such that the surface tension of the fluid holds it between the two beads. The fluid is a viscous liquid such as polymethylsiloxcine or a watch makers oil. The two elements can be of various shapes, e.g. a tube with a ring inside.
Patent GB-896972-A (GB)
Title: New quaternary ammonium anthraquinone dyestuffs and a process for preparing the same
IPC: C09B1/56
Filed: 1960-05-12
Abstract: The invention comprises dyestuffs of the formula <FORM:0896972/IV (c)/1> where A is a substituted or unsubstituted anthraquinone nucleus free from -COOH and -SO3H radicals; R1, R2 and R3 are alkyl radicals of 1 to 4 carbon atoms; Y is an organic or inorganic anion; m is 1 or 2; n is 2, 3 or 4 and the sulphur atom is attached to an alpha or beta position of the anthraquinone nucleus.  The anthraquinone nucleus may be substituted in alpha-positions by amino, alkylamino, arylamino, aralkylamino, acylamino and hydroxy, and in beta-positions by halogen.  The dyestuffs are made by condensing a mercaptan of the formula: A-(SH)m with a tertiary amine of the formula: <FORM:0896972/IV (c)/2> and alkylating the product with an alkylating agent having 1 to 4 carbon atoms in the alkyl groups, such as an alkyl halide, alkyl sulphate or alkyl ester of p-toluene-sulphonic acid.  Examples are given.  The dyestuffs dye acrylic fibres obtained from polyacrylonitrile or a copolymer containing as major constituent acrylonitrile in light yellow to blue shades from neutral or acid aqueous solution.
Patent GB-1103942-A (GB)
Title: Apparatus for the mixing of granulated or powdered materials
Inventor: HODGSON GORDON RALPH
IPC: B01F29/64
Filed: 1964-04-23
Abstract: 1,103,942. Mixing machines. JOHNSON MATTHEY & CO. Ltd. 23 July, 1965 [23 April, 1964], No. 16845/64. Heading B1C. A mixer comprises a rotatable drum 11 having blades 23, 24 rotatable therein independently of the drum. The cylindrical drum is freely mounted on a shaft 10 on which are fixed the ribbon blades 23, 24 shaped to propel the mixture towards the centre of the drum. The drum is rotated by a motor 16 in the same or opposite direction to the shaft 10 which is driven by a motor 20. Scraper blades 27, 28 fixed to shaft 15 keep the ends of the drum clean, and openings 29, 30 with lids 31, 32 allow emptying and filling; a third opening 33 closed by cover 34 permits cleaning. When mixing is completed, the drum is stopped with opening 30 at the bottom, lid 32 is removed and shaft 10 rotated to discharge the mixture through the opening.
Patent GB-848929-A (GB)
Title: Improvements relating to textile fabrics and felts for technical purposes
IPC: C08F220/44
Filed: 1958-05-27
Abstract: A textile fabric or felt consists of fibres of a polymer containing at least 90 moles per cent of monoethylenically unsaturated copolymerisable monomer, cross-linked by up to 0,1 moles per cent, preferably from 0,01 to 0,06 moles per cent, of a cross-linking agent, the moles per cent referring to the total number of structural monomeric units of the polymer. Specified monomers are vinyl acetate, acrylic acid, acrylamide, methacrylonitrile, methacrylamide and esters of acrylic acid and methacrylic acid.  The cross-linking agents may be a polyethylenically unsaturated monomer, e.g. divinyl benzene, methylenebisacrylamide, diallyl phthalate or maleate, ethylene acrylate or diacrylate, triacrylohexahydrotriazine, or a polyvalent metal compound, e.g. aluminium sulphate.  The crosslinking by a polyvalent metal compound may also follow a monomer cross-linking, or such second cross-linking may be by an acid treatment.  The felt may be used as paper maker's felt. Specifications 824,225 and 824,226 are referred to.
Patent GB-543236-A (GB)
Title: Improvements relating to pneumatic tyres
IPC: B29D30/06
Filed: 1940-11-25
Abstract: 543,236. Pneumatic tyres. TYRESOLES, Ltd. (Hawkinson, P. E.). Nov. 25, 1940, No. 16897. [Class 144 (ii)] A pneumatic tyre cover is vulcanized with the casing 21 constrained to a shape (Fig. 4) which is midway between the normally fully-expanded shape (Fig. 2) and the rolling shape under normal load (Fig. 3). In the preferred method of building-up the tyre, the breaker-strip 24 and shouldered under-tread portion 23<SP>1</SP> are vulcanized with the constricted casing, the wearing-tread 28<SP>1</SP> being subsequently applied, and vulcanized, with the casing fully expanded. The local vulcanization of the tread portion 28<SP>1</SP> may be effected by the method and apparatus described in Specification 420,829, [Group V].
Patent GB-952929-A (GB)
Title: Improvements in the production of effervescing steel
Inventor: LONGDEN HAROLD ARTHUR
IPC: B22D11/11
Filed: 1961-05-09
Abstract: In a continuous casting process rimming steel is over-deoxidized prior to pouring so that the product of the carbon and oxygen contents is brought to less than the optimum value which has been predetermined for the particular conditions of operation, to yield suitable subcutaneous blow-holes and the steel is then re-oxidized to the optimum value.  Deoxidation may be achieved with aluminium, or preferably with silicon, as in the form of ferrosilicon, and re-oxidation by the addition of iron oxide, e.g. as a powder in a stream of carrier gas or by surface blowing the metal with jets of oxidizing gas either as it enters the mould or preferably as it leaves the ladle.  As illustrated in Fig. 6, over-deoxidized metal flows from ladle 1 into launder 4 and thence to tundishes 6 and nozzles 7 leading to moulds 9. Oxygen is blown against stream 3 by means of pipes N controlled by valves 13, or may be blown against streams 5 and 8.  The flow of oxygen may be additionally monitored by gamma-ray equipment 16, 17, Fig. 7, which assesses whether the blowholes in the ingot are <PICT:0952929/C3/1> <PICT:0952929/C3/2> adequately buried and operates valve 13 accordingly.  According to the Provisional Specification control can also be effected by means of photo-cells which monitor the height to which molten metal is thrown above the pool in the mould.
Patent GB-943846-A (GB)
Title: Improvements in and relating to polyacrylonitrile yarns
Inventor: CLIMIE IAN ERNEST
IPC: D01D5/22
Filed: 1961-05-10
Abstract: In an example, a solution containing 789 mls. dimethyl formamide, 336 mls. acetone, 450 mls. acrylonitrile, 30 mls. methyl acrylate, 4.5 gms. itaconic acid, and 7.5 gms. azobisisobutyronitrile was heated at 50 DEG C. for 24 hours to give an acrylonitrile copolymer solution having an intrinsic viscosity of 1.6 at 25 DEG C., in dimethyl formamide.ALSO:High-bulk polyacrylonitrile yarn is made by extruding a polyacrylonitrile solution through a multi-hole jet having holes of at least two sizes, each of at least 20% of the holes having a cross-sectional area less than half that of the average of the remaining holes, into a liquid coagulating medium to form filaments and in which each freshly coagulated filament has a cross-sectional area which at the most is equal to that of the hole from which it issues, and taking up the filaments at substantially the same linear speed.  Coagulation of the filaments may be accompanied by a reduction in their cross-sectional area. Suitably, the spinning solvent contains a major proportion by weight of dimethyl formamide, dimethyl acetamide or dimethyl sulphoxide and also an aromatic hydrocarbon.  The coagulant may also be an aromatic hydrocarbon, e.g. benzene, toluene, or xylene, or a mixture of any two of these.  In the high bulk continuous filament yarn so made the filaments are of at least two deniers, of which one is less than half the other, the smaller denier filaments being present to the extent of at least 20% of the number of filaments in the yarn and comprising more highly orientated polyacrylonitrile than that in the larger denier filaments.  Acrylonitrile homopolymers, and copolymers containing at least 80% acrylontrile, preferably 90-95% with styrene, methyl acrylate, itaconic acid, methallyl sulphonic acid and its salts, vinyl acetate, and vinyl pyridine, may be used.
Patent GB-478114-A (GB)
Title: Tongs for carrying plates, wires and the like
IPC: B66C1/48
Filed: 1937-06-18
Abstract: 478,114. Tongs; holding tools. SCHARPENBERG, E. June 18, 1937, No. 17007. [Class 61 (ii)] Tongs for gripping plates &c. comprise jaw member a, b connected by pin and slot l, k and each provided with two reversely arranged gripping points, e, g and f, h engaging the work i on opposite sides. In the modification shown in Fig. 2, the jaw members m, n are connected by links o to a lifting ring p, and in another modification, Fig. 4, each jaw m, n carries a pair of pins q, r, the pins r engaging a hole s and opening t in member n; jaws r recessed to grip a wire u may be assembled on the pins q, r.
Patent GB-594924-A (GB)
Title: Improvements in or relating to compressors
IPC: F04D25/02
Filed: 1945-07-04
Abstract: 594,924. Centrifugal &c. fans &c. SULZER FRERES SOC. ANON. July 4, 1945, No. 17040. Convention date, Dec. 19, 1944. [Class 110 (i)] A multi-stage compressor plant including both centrifugal and axial flow stages has a centrifugal stage 10 0 arranged before any of the axial flow stages 15 and includes means for removing foreign substances which may be separated out from the main flow of medium passing through this stage.
Patent GB-143748-A (GB)
Title: Improvements in or relating to screens suitable for the reception and exposure of cinematograph and like pictures
IPC: G03B21/60
Filed: 1919-07-08
Abstract: 143,748. Lawrence, W. July 8, 1919. Optical-projection apparatus. - A projection screen is made by treating a textile backing with dope as used for aeroplanes to render it waterproof, coating one surface with adhesive material, and depositing aluminium powder on the adhesive material while it is tacky. The excess of aluminium powder is removed and the surface is finally polished. The adhesive material may be motor-body varnish, french oil, or white enamel. The aluminium powder may be of a fineness corresponding to ordinary wheat flour, and may have finely powdered material such as french chalk, flake lead, or white lead mixed with it.
Patent GB-376462-A (GB)
Title: Improvements relating to enclosed or ironclad electrical switches
IPC: H01H21/22
Filed: 1931-06-13
Abstract: 376,462. Snap-action switches. CRABTREE, J. A., Endwood, Little Aston Park, Sutton Coldfield. June 13, 1931, No. 17216. [Class 38 (v).] In an ironclad switch of the kind in which the operating spindle extends through an opentopped gap a<1> in the side of the box a, the gap is closed by a U-shaped member b provided with holes to accommodate a bearing bush c for the operating spindle. The bush c is enlarged at one end c<1> while the other end passes through a mechanism-supporting bracket e and is screwthreaded to take a nut d which clamps the parts in position. The limb b<1> of the member b may be provided with teeth engaging recesses in the box wall to provide positive location of the member b.
Patent GB-696135-A (GB)
Title: Improvements in the colouring of textile material made of cellulose esters or ethers
Inventor: OLPIN HENRY CHARLES
IPC: D06P3/44
Filed: 1950-07-10
Abstract: Cellulose ester or ether textile materials are coloured by steaming after impregnating them with a preparation containing a diazo-amino compound, an enolic coupling component, and an organic base volatile in steam, in a liquid medium which, when including the organic base, is a swelling agent for the cellulose derivative.  The organic base may be of the type NR1R2R3 in which R1 is hydroxyalkl and R2 and R3 are hydrogen, hydroxyalkyl or alkyl, e.g. hydroxyethyl-diethylamine. As liquid media there may be used aqueous solutions of alcohols, ketones, esters or ethers including compounds containing two or more polar groups in the molecule, e.g. methyl, ethyl, propyl and butyl alcohols, acetone, methylethylketone, diacetone alcohol, glycol monoacetate, glycerol diacetate, glycol monomethyl and monoethyl ethers, ethyl lactate, ethylene and propylene chlorohydrins, methylene ethylene ether, diethylene glycol, methyl glycol acetate and thiodiglycol.  The preparations may also contain a thiocyanate. The textile material may be impregnated by padding or printing and a thickener such as methyl cellulose may be present.  In an example, cellulose acetate fabric is printed with a paste containing diazotized 4-chloro-2-aminotoluene stabilized with sarcosine, the orthotoluidide of 2,3-hydroxynaphthoic acid, diethylaminoethanol or triethanolamine, water, methyl cellulose, sodium thiocyanate and methylated spirit, dried and steamed at 225 DEG  F.  The Specification refers to many other suitable diazoamino compounds and enolic coupling components.  Specification 696,134 is referred to in the Provisional Specification.
Patent GB-325182-A (GB)
Title: A new or improved turntable for road vehicles
IPC: B60S13/02
Filed: 1929-06-05
Abstract: 325,182. Aldam, E. H. June 5, 1929. Turntables for road vehicles consist of a table b, Fig. 2, with radial members b' each carrying a wheel d engaging a raised track rail a<5> mounted in a concrete pit a having a raised socket c<3> and a. lateral extension a<3> forming a sump and inspection chamber. The members b<1> are united by plates c, c<1>, the latter having a pivot pin c<2>. The pit may have a metal edge a<1>. The chamber a<3> may be extended to receive a lock e, Fig. 5, engaging the edge of the table and provided with a slotted head c<2> engaging in the lock position an eye-bolt e<3>, the eye receiving a pin or a padlock. In the free position, the head c<2> rests in a recess e<4>.
Patent GB-123541-A (GB)
Title: Improvements in Two-stroke Internal Combustion Engines.
Inventor: JEFFARES WILLIAM
IPC: F02B75/22
Filed: 1917-11-23
Abstract: 123,541. Jeffares, W. Nov. 23, 1917. Two-stroke-cycle engines.-In an engine having radial or other cylinders, the pistons carry trunks of reduced diameter, and pump charges are compressed in the ends of the cylinders adjacent the crank chamber. In the radial-cylinder engine shown in Fig. 1, air or combustible mixture enters the crank case through piston-controlled ports X and is drawn into the pump ends L of the cylinders through passages P<1>. The end of each passage opens into a pump space and the other end is controlled by the trunk of the piston of an adjacent cylinder. Charges are transferred from the pumps to the combustion chambers through passages W and piston-controlled ports N. Exhaust valves S are located in the cylinder heads According to a modified arrangement, the pump charges may be delivered through valves in the cylinder heads, the exhaust gases escaping through terminal ports. In an engine having cylinders arranged other than radially, charges may be compressed in the crank chambers to supplement those compressed in the pump ends of the cylinders. Air may be drawn into each crank chamber through a piston-controlled port, combustible mixture being compressed in the pump ends of the cylinders. Both charges may be transferred to a combustion space through a common passage; or separate passages may be provided. A portion of the air may be rejected from each cylinder to the crank case or pump space by suitably timing an inlet valve in the cylinder head. In an engine having diametrically-opposed radial cylinders in four parallel planes at rightangles to the crank-shaft, the cranks are disposed as shown in Fig. 2. Firing occurs simultaneously in the cylinders A, D, F, G or in the remaining cylinders B, C, E. H. The cylinders may be arranged in two rows inclined to one another at 90 degrees or in three rows of which the outer rows make an angle of 60 degrees with the central row. When using two rows of cylinders, the two inner cranks make with one another an angle of 45 degrees, the angle being decreased to 30 degrees when three rows of cylinders are employed.
Patent GB-544827-A (GB)
Title: Improvements in conveyors
IPC: B65G39/20
Filed: 1940-12-04
Abstract: 544,827. Rope railways. TORRANCE, J. J. Dec. 4, 1940, No. 17272. [Class 104 (ii)] In a conveyer of the kind having one or more driving fingers 41 projecting from a chain 1, and adapted to engage the trucks to be moved, the fingers project through and travel along a slot 14 formed in or by cover plates 13 shielding thechain. The chain consists of closed pairs of bars bolted together, alternating with open pairs, and supported by rollers 5 travelling on tracks 11, resting on the base 10 of a casing 10. 12. 13 enclosing the chain. One or more of the plates 13 may be mounted on springs, so that when depressed they operate electric switches to stop the motor driving the chain. The rollers 5 may run on ball bearings.
Patent GB-612933-A (GB)
Title: Improvements in or relating to machines adapted for cementing shoe parts
IPC: A43D25/18
Filed: 1946-06-08
Abstract: <PICT:0612933/III/1> <PICT:0612933/III/2> <PICT:0612933/III/3> A machine adapted for applying cement to material disposed about at least part of the periphery of a partially completed shoe and extending beyond the bottom thereof and comprising rolls arranged to co-operate to grip the material and shoe - bottom supporting means adapted to co-operate with said rolls in enabling the work to be fed through the material and said material to have applied to it a force acting away from the shoe bottom to tension the material, has the shoe-supporting means in the form of a device which is rotatable with one of said rolls.  Referring to Figs. 1 and 2, a platform cover 40 to be cemented is gripped between the cement-applying roll 2 and the driven work-supporting roll 4 and the bottom face of platform sole 42 is held against the surface of the conical button 32.  As the cover 40 travels between rolls 2 and 4 and receives cement from roll 2, the position of the line of contact between the frusto-conical button 32 and sole 42 varies as successive parts round the periphery of the shoe travel past the bite between rods 2 and 4 and so a cross-feed action is imparted to platform cover 40 stretching it and causing roll 2 to apply to it a marginal band of cement, one edge of which is separated from the corner of sole 42 by a clean margin.  The width of this margin is determined by the thickness of the wall 26 plus washer 44. Solvent type cement is supplied from a reservoir 6, carried in block 8.  Roll 2 is driven by shaft 14 into which stem 34 of the button 32 is threaded.  Fig. 3 shows a modification for supplying latex-type solvent in which the cement is transferred to applying roll from a trough supplied from an inverted bottle by a series of rolls (not shown).  In this case, conical button 32a is separated from the end of cement applying roll 2 only by means of one or more washers 44 which determine the width of the clean margin.  A platform-cover-guiding finger 48 may be used to help straighten platform covers which may tend to lie too close to the adjacent surface of the sole.
Patent GB-1378249-A (GB)
Title: Calendar-watch with day-of-the week and date indicating means
IPC: G04B19/25
Filed: 1972-04-14
Abstract: 1378249 Calendar watches FABRIQUE D'HORLOGERIE CHS TISSOT ET FILS SA 14 April 1972 [16 April 1971] 17338/72 Heading G3T A calendar watch having hands and concentric day and date rings 10 and 6, is corrected by rotating a calendar setting wheel 8 having fingers 36, 37 which respectively engage teeth 15, 7 on the rings 10, 6. Rotation of the wheel 8 is effected by rotating the winding stem in the hand-setting position. The fingers 36, 37 are not located diametrically opposite on the wheel 8, so that by to and fro rotation of the winding stem, with the hands indicating approximately midnight, the date ring alone can be indexed, and with the hands near the 1 a.m. position, the day ring can be similarly indexed alone. Jumpers 17, 20 respectively hold rings 10, 6 so that each set of teeth 15, 7 is portioned asymmetrically with respect to a straight line between the centre of wheel 8 and the common centre of the rings 10, 6. Thus forward winding of the stem indexes the rings, whereas the jumpers prevent backward winding of the stem from indexing the rings in the opposite direction. During normal operation of the watch, wheel 8 is indexed by teeth 32 on the hour wheel engaging sets of teeth 38, 39. Between indexing, enlarged gaps 40, 41 between teeth sets 38, 39 are held by the periphery 31 of the hour wheel. In a modification the wheel 8 is used for correction purposes only, a further mechanism driving the rings 10, 6. Axial play of the hour wheel is prevented by three resilient fingers 29 pressing against a bridge 9.