baber/WOPTO huggingface dataset:
Patent GB-419885-A (GB)
Title: Improvements in or relating to superheterodyne radio receivers
IPC: H03D7/10
Filed: 1933-05-23
Abstract: 419,885. Valve circuits for wireless reception. COLE, Ltd., E. K., Ekco Works, Priory Crescent, Southend-on-Sea, and BRADFIELD, G., 161, Hainault Avenue, Westcliffon-Sea. May 23, 1933, No. 14844. [Class 40 (v).] Automatic volume control potentials are applied to at least one of the electrodes of a multigrid valve of the type in which a " virtual cathode " exists on or between two of the grids by virtue of the external connections which are also arranged so that the valve electrodes act as an amplifier and an oscillator, in that order, between the main cathode and anode. As shown, said valve comprises the detectoroscillator valve A of a superheterodyne receiver, the signals being applied from an input circuit a to the first control grid 2 which is surrounded by a screen grid 3 suppressor grid 4, intermediate anode 5, second control grid 6 and main anode 7. The suppressor grid 4 may be adjacent the main anode 7. The anode 5 is connected through a tuned circuit e, condenser d, earth, and resistance c shunted by condenser b to the cathode 1, and also through condenser f to the control electrode 6 to produce oscillations of the frequency of the circuit e. The anode 5 is supplied with positive potential from the anode resistance n of the pentode intermediate frequency amplifier B which feeds a diode-triode valve C provided for second detection and low frequency amplification. The load resistance k of the diode rectifier is tapped to provide D.C. automatic volume control potentials for the grids 2, 6 of valve A and the control grid of valve B through known filter circuits. Further control is effected by the changes of potential of the anode 5 due to changes in the current flowing through resistance n. Specification 408,256 is referred to.
Patent GB-1478006-A (GB)
Title: Apparatus for growing monocrystals
IPC: C30B13/28
Filed: 1976-04-12
Abstract: 1478006 Float zone refining apparatus LEYBOLD - HERAEUS - VERWALTUNG GmbH 12 April 1976 [11 April 1975] 14918/76 Heading B1S Apparatus for growing monocrystals by float zone melting of an ingot with a necked seed crystal comprises a means for supporting the cylindrical part of the monocrystal above the neck and below the zone during growth. As shown in Fig. I an embodiment of a suitable support 27 comprises a number of clamping elements 28 located at intervals around the circumference of the monocrystal 18 and at different levels A and B. The clamping elements 28 are supported by rods 24 which can be moved up and down parallel to the crystal axis by cylinder 30 independently of the actuation of the clamping elements. The clamping elements 28 can conveniently be spherical balls held in a conical trough 35, the backing surface of which forms a clamping surface for the balls while the monocrystal 18 forms the other. Due to the conical nature of the backing surface the clamping elements 28 are self adjusting depending on the diameter and surface shape at the contact point of the clamping member. A lifting device (not shown) is located under the clamping elements in order to lift them and so unclamp the monocrystal. Alternative arrangements for the clamping members are described using hydraulically operated plungers or pantograph levers which hold the clamping members and bring them into contact with the cylindrical part of the monocrystal.
Patent GB-1427484-A (GB)
Title: Method of manufacturing a green light-emitting gallium phosphide device
IPC: H01L21/208
Filed: 1974-04-04
Abstract: 1427484 Epitaxial growth TOKYO SHIBAURA ELECTRIC CO LTD 4 April 1974 [4 April 1973] 14940/74 Heading BIS [Also in Division H1] A green light-emitting GaP device manufactured by adding nitrogen at or near saturation to a liquid-phase epitaxy solution maintained at above 1000C (preferably 1030-1100C), reducing the solution temperature to 600- 1000C (preferably 900-1000C) and bringing it into contact with a GaP substrate of the same conductivity type on the solution, cooling the solution to deposit a nitrogen-containing liquid-phase epitaxial (LPE) layer on the substrate, and forming a region of the opposite conductivity type in or on the nitrogen-containing LPE layer by diffusion or further liquidphase epitaxy. The nitrogen is added to the solution from a compound such as NHg, GaN, PN, P 2 N 3  or P 3 N 5 . The substrate and LPE layer may both be n type, nitrogen providing the donor is the latter, or they may be p type, in which case excess acceptor is required. The invention is also applicable to pnpn negativeresistance light-emitting diodes.
Patent GB-671181-A (GB)
Title: Improvements in or relating to a device and method for removing the lining from poultry gizzards
IPC: A22C21/06
Filed: 1950-06-15
Abstract: 671,181. Skinning poultry gizzards. SWIFT & CO. June 15, 1950 [Dec. 12, 1949], No. 14954/50. Class 28 (ii). The linings or inner skins of the opened out gizzards 13 of poultry are torn off by a pair of skin gripping rotated rollers 10, 11 which draw the skin down between them while the gizzards pass over the top of the rolls. The rollers may be knurled or grooved with staggered notches 19 between their ridges 18, and they may be built up of spaced wheels or shafts so that they can intermesh or overlap. The feed plate 14 can be tilted to any desired angle to the bite of the rollers so that the gizzards may slide down by gravity. Alternatively a conveyer may feed them to the rollers. The skinned gizzards pass down a chute 16. The rollers are kept clean by combs 42.
Patent GB-544358-A (GB)
Title: Improvements in or relating to the application of covering or reinforcing material to window or like apertures
IPC: E06B9/24
Filed: 1940-10-08
Abstract: 544,358. Covering window or like apertures. B. B. CHEMICAL CO., Ltd., WILSON, L. E., and DARLEY, G. H. Oct. 8, 1940, No. 15004. [Classes 20 (iii) and 20 (iv)] In the application of covering or reinforcing material, such as flexible sheets of cellulose acetate, to window and like apertures, the material is secured to an applicator device adjusted to the size of the aperture, and is applied to the aperture with an adhesive between the border of the aperture and the material. The material is pressed against the border of the aperture to which it adheres, the device being then removed, leaving the material in position. The applicator comprises a frame formed by four angle members 1 adjustable relatively to one another by sliding along bars 5 which move in guideways 3 in which they are secured by screws 7. After the applicator has been adjusted to fit the window opening, a sheet of covering material 23 is stretched over the frame and secured by clips 15. The frame is picked up by handles 19 and applied to the window flange, an adhesive having been laid round the aperture in the angle between the flange and skirting, and the adhesive is spread out by pressure and secures the material to the window, after which the clips are released and any necessary trimming of the material carried out. It is stated that this method may be employed for applying covering or reinforcing sheet material to panelled surfaces in walls or roofs of vehicle bodies.
Patent GB-881741-A (GB)
Title: Improvements in or relating to apparatus for the preparation of mixtures of powdered solid substances
Inventor: ALLEGRET GERALD
IPC: B01F11/00
Filed: 1958-05-12
Abstract: <PICT:0881741/III/1> <PICT:0881741/III/2> A mixing and grinding apparatus suitable for use in chemical reactions in which a solid is reacted with a gas, comprises an inverted substantially frusto-conical vessel a (Fig. 2) adjustably and flexibly supported from a steel framework by rods b and shock absorbers h, and a shaft d extending along the axis of the vessel and carrying arms e, f, supporting two-start tapered spiral members c1, the surfaces of the members c1 (Fig. 3) being inclined by at least 45 degrees radially outwardly and downwardly towards the inside wall of the vessel a and the surfaces of the arms e, f, also being inclined to the horizontal. The gas is injected through the base of the apparatus during mixing. The grinding effect may be increased by narrowing the gap between the vessel side and the members c1.  The shaft is driven by a motor and reduction gear supported by the framework and the vessel has a lid j and a filling opening k.  Vibrators, either mechanical, electromagnetic or ultra-sonic may be fixed around the outside of the vessel to enhance the mixing.  In a modification described with reference to Figs. 4 to 6 (not shown) the spirals are replaced by segments of a spiral or spirals which segments are connected to frames secured to the supporting arms e, f.  The materials constituting at least the inside surface of the vessel and the surface of the agitating device are selected, e.g. from metals or alloys or agglomerated, stratified, reinforced plastic or elastic materials.  For a mixture containing, e.g. sodium bisulphate, an apparatus made of stainless steel with a high content of molybdenum may be used.  If the mixture liberates a volatile mineral acid, e.g. hydrochloric acid, the linings of the vessel and agitating device could be of hard rubber or of acid-proof plastic material.  The inside surface of the vessel may be roughened or ribbed.
Patent GB-499959-A (GB)
Title: Improvements in or relating to method of and means for making porcelain dental articles such as artificial teeth
IPC: A61C13/08
Filed: 1937-05-31
Abstract: 499,959. Moulding porcelain dental articles. MEYER, L. W. (Erdle & Prange, Inc.) May 31, 1937, No. 15116. [A Specification was laid open to inspection under Sect. 91 of the Acts, March 22, 1938.] [Classes 22, 70, and 87 (ii)] [Also in Group VI] Dental articles such as artificial teeth are produced by compacting moistened finely ground porcelain in a mould by prolonged vibration, removing the body from the mould, and then fire-hardening it. The mould is preferably flexible and is prepared by inverting a flask 5 over a tooth pattern 9, pouring the mould material 17 in through openings 8, and allowing it to set. The mould may be made of rubber, plasticized vinyl chloride, glue, gelatine, &c. In the case of glue or gelatine the mould may be lined with colloidal rubber solution either directly or by coating the pattern 9 which is first saturated with coagulating material such as boric acid. The pattern may be prepared from natural teeth by a duplicating machine or by taking an impression in a mixture of ground glass and silica which is fired to form an enlarged pattern. The artificial tooth is formed of ground porcelain, preferably of 200 mesh or finer, and a binder in proportions of two to one. Suitable binders comprise an organic silicate such as tetraethyl silicate, sodium silicate and hydrochloric acid, zinc oxide and phosphoric acid, magnesium oxide and magnesium chloride, zinc chloride and magnesium oxide. Plaster of Paris, 5 per cent of Nepheline Syenite, or <4>/10 per cent of boric acid, moistened with water may also be used. Plain water or water with the addition of clay, dextrin, or sugar is also suitable. The mixture of porcelain and a binder is placed in the mould 27, subjected to vibration, and allowed to set. The mould 27 is flexed to release the tooth 30, as shown in Fig. 5. If a shaded tooth is desired, porcelain of different shades is placed in the mould in batches. The top part of the tooth is ground away to form a ridge lap which fits the gum and this ridge lap may be grooved as at 35, Fig. 8, or may be coated with a mixture of glaze, shellac, and refractory grains, which forms a granular surface on firing. Metal pins may be placed in the mould and thus embedded in the tooth. As shown in Fig. 14, the flexible mould 50 may be confined in a metal container 58 which distorts it so as to alter the dimensions of the mould cavities 53. The moulded tooth, before firing, may be impregnated with paraffin wax or lacquer and may be machined or drilled or may be hollowed out to form a thin shell crown. This shell may afterwards be filled with a strong porcelain to produce a translucent effect.
Patent GB-876533-A (GB)
Title: Improvements in or relating to the production of alkylene oxide polymers
Inventor: WADDAN DHAFIR YUSUF
IPC: C08G65/08
Filed: 1959-05-04
Abstract: Polymers of monoepoxides are prepared by polymerizing in the presence of a catalyst comprising a compound of the formula: M[R1(R2)a(R3)b(R4)c] or MO[R1(R2)a(R3)b(R4)c] where M is titanium, vanadium or zirconium; R is an alkoxy or aryloxy radical; R2, R3 and R4 are alkoxy, aryloxy or hydrocarbon radicals or halogen atoms; a+b+c=(valency of M)-1 in the first formula and (valency of MO)-1 in the second, and a, b and c are integers or zero.  The epoxides are defined as compounds of the formula:  <FORM:0876533/IV (a)/1> where R and R1 are each a hydrogen or a hydrocarbon radical, R11 is hydrogen or a hydrocarbon or halohydrocarbon radical, and R or R1 may be joined to R11 to form a cycloalkyl group.  Examples are epichlorhydrin, ethylene oxide, propylene oxide, 2,3-butylene oxide, 1,1-dimethyl ethylene oxide, cyclohexene oxide and styrene oxide. The monomers are preferably free of water and aldehydes. Copolymers, e.g. of propylene oxide with ethylene oxide or styrene oxide, are included.  Specified catalysts are titanium tetra p  n- and iso-butoxide, zirconium tetrabutoxide, titanium dichlorodiethoxide and chlorotriethoxide, vanadium pentabutoxide and dichlorotriethoxide, titanyl diethoxide and vanadyl triethoxide.  A solvent may be present, e.g., a hydrocarbon or chlorinated hydrocarbon.  Details are given of the ways the polymers may be purified.
Patent GB-318909-A (GB)
Title: Improvements in the manufacture and production of fertilizers
IPC: C05B7/00
Filed: 1928-03-10
Abstract: 318,909. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). March 10, 1928. Divided on 318,842. Manures.-The mixed fertilizer described in Specification 236,494 and consisting of urea, ammonium phosphate, and potassium nitrate, the latter of which may be partly or completely replaced by potassium sulphate, is modified by replacing the urea wholly or in part by sodium nitrate, the ingredients being used in such proportions that nitrogen, phosphorus, (calculated as pentoxide), and potassium (calculated as oxide) are present in the product in substantially the proportions 1 to 0.6 to 1.5. The potassium nitrate or sulphate may be replaced wholly or in part by potassium chloride. Specifications 30683/97 and 231,021 also are referred to.
Patent GB-945175-A (GB)
Title: Lawn mower
IPC: A01D34/42
Filed: 1961-04-27
Abstract: 945,175. Mowing machines. J. H. POSTLEWAIT. April 27, 1961, No. 15275/61. Heading A1F. In a lawnmower of the type having a rotary reel 20 but no ledger-blade, the reel is formed by a thin-walled tube 21 having elongated angle-members 22 extending along its length, each anglemember being sharpened to an edge 27 which extends at an obtuse angle to a fastening limb 23 secured to the tube. The limbs 23 may be spot-welded or bolted to the tube 21 which terminates in end-discs, one of which 32 (Fig. 5) has an integral pulley 40 to receive the belt-drive 15 from a motor 12 on the frame 1, the motor being either internalcombustion or electric. The end-discs have axial bores 41, 43 to receive ballbearings 47 which run on stub-axles 49 secured to the side-plates 3 of the machine. The machine is mounted on front and rear pairs of wheels 7, 5, either or both pairs being adjustably mounted in holes such as 59 in the side-plates 3.
Patent GB-1351796-A (GB)
Title: Pressure regulating safety valve device
IPC: F16K31/365
Filed: 1971-05-14
Abstract: 1351796 Fluid-pressure servomotor systems COMPAGNIE DES COMPTEURS 14 May 1971 [14 May 1970] 15338/71 Heading G3P In a safety valve arrangement comprising a main valve 1 and a pilot valve 2, the flow from a supply line 18 to a vent line 21 is determined by the pressures prevailing in control chambers 23 and 26 of the main valve and in control chamber 31 of the pilot valve. All three chambers are connected to the supply line through a branch line 6, the connection to chamber 23 being direct via line 6a, that to chamber 26 being via line 6b and a restrictor 3, whilst that to chamber 31 is via line 6b, restrictor 3, line 7, manually operable three-way valve 4, and line 8. An excessive rise in pressure within line 18 results in a downwardly directed pressure differential being created across diaphragm 15 of the main valve 1 and in diaphragm 27 of pilot valve 2 being raised against the force of its manually adjustable spring 32. Accordingly, lines 7 and 8 are vented to line 10 and valve member 16 of the main valve 1 is lifted off its seat 12. A small and slow rise in pressure within line 18 results in an unseating of pilot valve member 29 only, the differential created across diaphragm 15 being, in such a case, insufficient to overcome the bias of its associated spring 25.
Patent GB-1016023-A (GB)
Title: Improvements in or relating to chairs
Inventor: MORRIS RICHARD VENABLES
IPC: A47C7/40
Filed: 1962-04-24
Abstract: 1,016,023. Chair frames, spring upholstery. MORRIS WILKINSON & CO. (NOTTINGHAM) Ltd. March 27, 1963 [April 24, 1962], No. 15437/62. Headings A4H, A4J and A4M. A chair comprises a resilient seating surface 1, legs 3 detachably secured to the surface, a frame forming member 4, and a back 5 formed from a non-rigid material, e.g. a textile fabric or woven fibre fabric, which is attached to the member 4 and the seating surface 1. The member 4 is spaced from the seating surface by stretchers 6. The seating surface 1 is sprung by either coil springs, or zig-zag springs tensioned in an arc, with a resilient packing material 18, e.g. rubberised hair or foamed materials, placed beneath the outer covering. The non-rigid material forming the back 5 may be enamelled .
Patent GB-396525-A (GB)
Title: Improvements in or relating to sieves
IPC: B07B13/00
Filed: 1932-06-01
Abstract: 396,525. Sieves. MAYOR, J. J., 19, Bairstow Street, Preston. June 1, 1932, No. 15467. [Class 117.] Hand riddles or sieves consist of an outer circular frame 10 with an internal ridge 13 on which is detachably supported the mesh comprising a circular border wire 14 and interwoven corrugated strips 15 bent round the wire at their ends. The strips may be doubled for strength and the mesh may be galvanized. Preferably one or more locking strips 16 are fastened to the inside of the frame for securing the mesh.
Patent GB-1141606-A (GB)
Title: Improvements in alkyl ethers of substituted phenylaminoethanols
Inventor: GRADNIK BORIS
IPC: C07D295/084
Filed: 1965-04-12
Abstract: 1,141,606. Basic ethers. SOC. D'ETUDES DE RECHERCHES ET D'APPLICATIONS SCIENTIFIQUES ET MEDICALES. 4 April, 1966 [12 April, 1965], No. 15501/65. Heading C2C. Racemic and optically active compounds of the general formula (R = C 4 _ 12  alkyl, R 1 , 2  = H, halogen, C 1-4  alkyl, C 1-4  alkoxy or cycloalkyl having up to 6 carbon atoms, R 3  = H and R 4  = benzyl or -NR 3 R 4  = 1-pyrrolidinyl, piperidino, 1- piperazinyl or morpholino, optionally substituted by one or more C 1-4  alkyl or hydroxyalkyl radicals), N-oxides of the heterocyclic bases, acid addition salts of the bases and N-oxides and quaternary ammonium salts of the heterocyclic bases and N-oxides derived from alkyl halides and dialkyl sulphates are prepared by (a) etherification or (b) reacting the corresponding #-alkoxyphenethyl bromide with R 3 R 4 NH, optionally followed in either case by oxidation and/or salt formation. The preparation of alcohol starting materials for process (a) is described. The compounds of the invention exhibit varied pharmacological activity, and may be administered in the form of pharmaceutical preparations containing them together with a carrier.
Patent GB-218963-A (GB)
Title: Improvements relating to change speed gearing
IPC: F16H29/18
Filed: 1924-06-27
Abstract: 218,963. Laub, A. July 11, 1923, [Convention date]. Variable-speed gearing comprises a ring of pawls g movable radially in slots e<1> in a disc e secured to the driven shaft f into more or less eccentric positions according to the speed required. Along with the pawls are moved to vary the speed a driving pulley or gear a with internal teeth d and a mask or shield i with an opening i<1> which allows the pawls g to engage the teeth d always in the same relative position. The spring-pressed pawls g are supported on pins g<1> which extend from blocks h in the slots e<1> into a circular guiding slot o in a non-rotary annular member b which slides transversely to a belt driving the pulley a and carries the mask i. The pulley a and member b are carried by a plate c which has a stud k projecting into a slot in an operating-lever n. Upon the lever n is pivoted a second lever s which has a cam extension u engaging the outer ends of spring plungers p. These plungers can thus be thrust into the path of the pawls g in their operative position disengaging them and stopping the drive. Alternatively, the shaft f may drive the pulley &c. a. The gearing is applicable for driving motor-vehicles, and machine tools.
Patent GB-1462223-A (GB)
Title: Servovalve apparatus
IPC: F15B13/043
Filed: 1974-04-08
Abstract: 1462223 Servosystems MOOG Inc 8 April 1974 [24 Aug 1973] 15511/74 Heading G3P A multi-two-stage electro-hydraulic servovalve apparatus collectively serviceable by a single fluid supply 39 and a single fluid return 40, comprises at least two servovalves 8, 9 each including a first stage hydraulic amplifier 14, or 18, capable of producing a differential pressure responsive to an electrical command signal, and second stage fluidflow control valve 12 or 16, responsive to the differential pressure, each hydraulic amplifier utilizing input operating fluid, and producing output operating fluid, each flow control valve including an actuating port 65, 67, or 91, 93, communicable with a pressure metering port 58 or 85, and a return metering port 60, 61 or 87, 88 determined by the position of a movable valve spool 12 or 16 arranged to be moved by the differential pressure, the operating fluid for the amplifiers 14, 18 being in series and the ports 65, 67 and 91, 93 of the servovalves being operatively associated with separate load actuators 68, 94. In operation, fluid passes from supply port 39 through passages 42, 43, 48, 50, to nozzles 33, 34, through passages 72, 73, 74, 76, 77, to nozzles 36, 37, thence through passages 101, 102 to fluid return 40. Fluid also flows from port 39 through passages 59, 86, to pressure metering ports 58, 85. Depending upon the position of spool 12, 16, these ports can be connected with one of the passages 64, or 66, 90 or 92, so as to actuate pistons 70, 96, the discharge from the latter passing through the other passages 64, or 66, 90 or 92, and return port 60 or 61, 87 or 88 to fluid return port 40. Electric command signals are applied independently to electromagnetic torque motors 13, 17, and the torque produced acts against a torque from spool feedback wires 57, 100, caused by movement of spools 12, 16, the torque difference being used to displace flappers against nozzles 33, 34, 36, 37, so as to cause an unbalance in flow. The nozzleflapper hydraulic amplifiers can be replaced by jet-type or deflector jet-type hydraulic amplifiers.