baber/WOPTO huggingface dataset:
Patent GB-781374-A (GB)
Title: Improvements in or relating to resonant electronic circuits
Inventor: GOOD EDWARD FRANCIS
IPC: H03B5/20
Filed: 1953-12-21
Abstract: 781,374. Valve circuits. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Dec. 21, 1954 [Dec. 21, 1953], No. 35472/53. Class 40 (6). The invention relates to resonant amplifiers of the type comprising two integrating circuits in cascade, a phase reverser and an overall feedback loop. The input is applied via a series resistor R5 to a phase reverser comprising an amplifier A3 with a resistor R4 connected between input and output. Each of the integrating circuits comprises a series resistor R1, a highgain amplifier A1, and a condenser C1 connected between input and output. Overall feedback is applied via resistor R3. In such an amplifier, positive damping is provided in order to stabilize the gain at resonance. Damping may be obtained by making one of the amplifiers A1 of finite and predetermined gain; by connecting resistance in series or shunt with one or both of the condensers C1 ; or by connecting capacitance across one of the resistors R1. In an arrangement in which the frequency can be varied by variation of both series resistors R1 (Fig. 3, not shown) a resistor is provided in series with one of the condensers C1 and is also variable, being ganged with the series resistors R1. The arrangement may be used as an oscillator of constant output, by returning the resistor R5 to the output of the first integrating circuit via a limiter (Figs. 6-10, not shown). The limiter may comprise a pair of oppositelypoled and biased rectifiers in shunt with the reaction path; alternatively the resistor R5 may comprise a lamp or thermistor, or automatic gain control may be applied to the oscillator.
Patent GB-1077666-A (GB)
Title: Improvements in low-alloy high-strength steels
Inventor: KOVESI PAUL
IPC: C22C38/52
Filed: 1963-09-09
Abstract: A low-alloy steel has the following percentage composition:- .C.0.35 to 0.5 .Si.0.5 to 3 .Mn.0.3 to 2 .Ni.0.3 to 1.5 .Cr.more than 1.5 to 3 .Mo.0.2 to 2 .V.more than 0.1 to 0.5 .Co.0.5 to 2 .Fe.the balance V may be replaced by any carbide former which is stronger than Cr or Mo.
Patent GB-1434239-A (GB)
Title: Echo cancellers
IPC: H04B3/23
Filed: 1973-07-26
Abstract: 1434239 Echo suppressors SIEMENS AG 26 July 1973 [10 Aug 1972 (2) 6 July 1973] 35553/73 Heading H4R The multipliers 61-69 of a transversal filter 21-29, 7 estimating an echo #y from the incoming signal x for subtraction 8 from the outgoing signal y+n to cancel hybrid leakthrough y are controlled by correlation 41-49, 51-59 of the filter tappings W 1 -W n  with the residual error e weighted 9 by factors K also derived 10 from the tappings w 1 -w n  and the error e, the factors K being normally maximal and reducing according to increasing outgoing noise and improvement in setting of the multipliers 61-69. The control unit, 10 for the weighting factors comprises a logic circuit (Fig. 2, not shown) which measures the average value Z m  of the estimated power of the interference on the outgoing signal over five iterations. A store (84) receives values of 0, Z m  or the actual power in the two-way communication according as the value of Z m  is negative, positive or above a positive threshold respectively. The updated weighting factor K m+1  is derived as the average over several steps of the ratio of the previous estimate r m  of the accuracy of the tap settings and the sum of the stored value S m+1  and the previous estimate of the power of the error a m r m . The weighting amplifier 9 Fig. 1 is adjusted to this new weighting K m+1  which includes a factor b = 1À9 for speech and 1À0 for digital data and white noise. The updated value of r m+1  is calculated as a function of the previous value or r m , a m r m  and the new K m+1  with constants c having the values 0À8 and 1À0 as for b, and d = 0À001 or 0À01 depending on whether there is risk of low frequency drift through the hybrid. Artificial values of 0 and 0À5 are assigned to the parameters s and r and the tap multipliers are set to zero gain at the start of iteration. In a modification (Fig. 3, not shown) the filter 21-29 is replaced by a single shift register (20) giving temporally spaced outputs, and the digital signals in the weighting-factor determining circuit 10 are coded exponentially so that the squaring and adding functions may be performed by exponential addition (Fig. 4, not shown). A typical coder (Fig. 5, not shown) produces a quantized output representing the binary levels of the input signal relative to, e.g. 16 threshold levels. In a further modification (Fig. 6, not shown) each tap multiplier is adjusted by the integrated sum of further multipliers varying the individual tappings w i  by the product of the error e and respective weighting factors q 11 -q nn  derived from the tappings and the square of the error. The evaluation of the weighting factors q ik  is similar to that of the Fig. 1 arrangement and follows the Kalman filter algorithm by solving a matrix equation of which the coefficient matrix defines q.
Patent GB-410245-A (GB)
Title: Improvements connected with finger rings
IPC: A44C9/00
Filed: 1932-12-16
Abstract: 410,245. Finger rings. MARSH, J. B., 5, St. Lawrence Mansions, Priory Park Road, Kilburn, London. Dec. 16, 1932, No. 35660. [Class 43.] A photograph is retained in a recess b in the collet of a finger ring by a hinged or removable hollow frame e provided with a protective cover g of unbreakable transparent material such as celluloid.
Patent GB-1425697-A (GB)
Title: Firing process for supplying heat to a chemical reaction
IPC: F23M20/00
Filed: 1974-08-13
Abstract: 1425697 Town gas production METALLGESELLSOHAFT AG 13 Aug 1974 [14 Sept 1973] 35674/74 Heading C5E [Also in Division F4] A plant for producing town gas is supplied with gasoline through conduits 1 and 3 and with process steam through conduit 5, the gasoline and steam being catalytically converted in the tubular heater 4 into a cracked gas that leaves the plant through a conduit 21 after passing through a carbon monoxide shift conversion, scrubbing units, and cooling units including an air-cooled cooler 19. The tubular heater 4 is supplied with fuel oil and combustion air through the conduits 22 and 23 and hot flue gases pass via a combustion air preheater 26 to a chimney 28. Part of the cooling air heated in the cooler 19 is collected by the hood 29 and fed through a conduit 30 to the air preheater 26 to provide the heated combustion air in the conduit 23.
Patent GB-915374-A (GB)
Title: Cold vulcanising repair patches or plasters
IPC: C08L23/02
Filed: 1959-10-21
Abstract: A multi-layer cold vulcanizing dry repair patch or plaster, for repairing rubber tyres, tubes, conveyer belts &c. without the prior application of rubber solution, comprises a main body of vulcanized rubber with or without reinforcing cord inserts, and a connecting layer which consists of a mixture of vulcanizable unvulanized natural and synthetic rubbers containing as accelerator a dry double salt of dithiocarbamates and organic alkali; and containing also as a preserving agent phenolformaldehyde condensation products.  The synthetic rubber may be copolymers based on poly-, polychloro-, or polymethyl-butylene, or butyl rubber, used in the proportion 1 to 40% by weight of the natural rubber, the preferred synthetic rubber being capable of crystallizing.  The preferred accelerator is a double salt of zinc ethylphenyldithiocarbamate and cyclohexylethylamine in the proportion 15 to 50% by weight of natural rubber.  The preserving agent may comprise aromatic hydroxyl compounds such as phenol, cresols and diphenylolpropane of the resol or resitol classes, preferably phenol or cresol resin modified with a terpene having at least ten carbon atoms, used in the proportion of 2 to 10% by weight of natural rubber.  The connecting layer may be strengthened by the addition of 0,5 to 4% silicic acid fillers by weight of natural rubber possibly together with 2 to 5% of zinc oxide.  To ensure adhesion between the main body and the connecting layer, a securing layer may be interprsed comprising unvulcanized rubber containing 0,2 to 2% of tetramethythiuram disulphide by weight of natural rubber.
Patent GB-488913-A (GB)
Title: Pipes for hot gases, steam and the like
IPC: F16L9/14
Filed: 1937-12-24
Abstract: 488,913. Pipes. AKT.-GES. FUR TECHNISCHE STUDIEN. Dec. 24, 1937, No. 35782. Convention date, Dec. 24, 1936. [Class 99 (ii)] A pipe for conveying hot gases consists of an inner tube 1 of mild steel with a thin heat-resisting lining 5 of aluminium, chromium, &c. and an outer coaxial tube 2 of sheet steel, the intermediate space being filled with heat-insulating material 3 such as asbestos, glass wool, hard-burned kieselguhr stone, &c. The inner tube may, if necessary, also be provided with a heatresisting coating. The ends of adjacent inner tubes are in telescopic engagement, and part 4 of the insulating material may be located around the outer tube.
Patent GB-1293141-A (GB)
Title: Improvements relating to friction welding
Inventor: ELLIS COLIN RONALD GEORGE
IPC: G01N3/00
Filed: 1969-07-16
Abstract: 1293141 Welding by pressure WELDING INSTITUTE 14 July 1970 [16 July 1969] 35790/69 Heading B3R [Also in Division G3] In a method of ascertaining and/or controlling weld quality in a friction welding process the rate of axial shortening of the workpieces is measured and compared with known rates for which satisfactory welds have been produced; the comparison may be used to indicate whether the weld is satisfactory or to adjust either the axial pressure applied to the workpieces or their rate of relative rotation so as to control the rate of axial shortening at the desired value. In an embodiment, Fig. 4, designed to given an indication of whether a satisfactory weld has been produced axial shortening motion is transmitted through rack and pinion means 1, 2, (6), 7 to a cam bar 8 arranged to operate limit switches, LS1, LS1A, LS2, LS3 the distance between switches LS1A and LS2 being arranged to correspond to a desired extent of axial shortening and the time for this distance to be moved being timed by means of a timer 10 to give a measure of the rate of axial shortening. Similarly the distance between switches LS2 and LS3 corresponds to a predetermined extent of shortening achieved in an upsetting stage after relative rotation has ceased, the time for this distance being measured and again compared with known satisfactory values. In a closed loop control system, Fig. 7, axial pressure is applied to the workpieces by means of a piston and cylinder 28, 29, hydraulic fluid being supplied to the cylinder through a pressure control valve 48. Fluid discharged from the port J of the cylinder passes through a flow regulating valve 58, the back pressure generated being proportional to the flow and thus to the rate of axial shortening of the workpieces. The pressure is applied through line 60 to a hydraulic control module 61 which in turn is connected so as to control the setting of the pressure control valve 48. A similar circuit may be switched in to control the rate of movement in a subsequent upsetting stage. The control valve 48 may alternatively be used to vary the rate of relative rotation of the workpieces in the required sense to adjust the axial shortening rate to the required value. References are made to the welding of aluminium to titanium and of mild steel workpieces.
Patent GB-330870-A (GB)
IPC: D06F75/16
Filed: 1929-11-25
Abstract: 330,870. Hirigoyen, E. H. Nov. 23, 1928, [Convention date]. Electric hand-irons with steaming arrangements.-The steam generating chamber 4 is packed with absorbent material 14 such as asbestos, wadding, fire-proofed or silicated cotton, porous porcelain or a mixture of plaster an infusible earth in order that the iron may be used in any position without leakage of water. A filter chamber 7 having baffles 8 is arranged between the generator and a superheating chamber 10 in order to trap any water carried over by the steam. Access to the chamber 7 is provided by apertures 15. An adjustable needle valve 9 places the superheating chamber in communication with the circular hollow distributing plate 11 arranged in a recess in the sole plate 1. The distributing perforations are arranged in a groove in the bottom face of the plate 11 which is adjustably secured to the hollow member 13 in which the needle valve works in order that the inclination of the distributing groove to the axis of the iron may be varied. The generator is provided with a safety valve 6 and the heating element 2 is secured between the generator and the sole plate.
Patent GB-362247-A (GB)
Abstract: 362,247. Floors. DIESPEKER & CO., Ltd., 57, Holborn Viaduct, and CHATWIN, A. S., 142, Victoria Road, Wood Green, both in London. Feb. 14, 1931, No. 4714. [Class 20 (iv).] Precast reinforced concrete beams 1 are laid side by side, and slabs or tiles 5 of asbestos-cement or other material are placed on edge in recesses 6 in the flanges to form air spaces 7 and channels for concrete 9 which may be reinforced by bars 10. A top layer 11 of concrete may be added.
Patent GB-363801-A (GB)
Title: Improvements relating to quick-action electric switches of the ironclad type
IPC: H01H21/04
Filed: 1930-12-03
Abstract: 363,801. Snap-action switches. CRABTREE, J. A., Endwood, Little Aston Park, Sutton Coldfield. Dec. 3, 1930, No. 36403. [Class 38 (v).] In an enclosed switch of the kind described in Specification 327,632, [Class 38 (v), Electric switches &c.], the moving parts are carried by a separate member d attached to the bottom of the switch box. The member d comprises a strip bent up to form end parts d2, d<3> having holes in which are journalled the ends of the contract-spindle b and the operating- spindle c<1> on which the spring-toggle snap-action mechanism is threaded. The member d, after the moving parts have been assembled on it, is fastened to the casing and the spindle c<1> is received in an open slot in the casing. The free end of the toggle housing is anchored to the bottom of the box.
Patent GB-367071-A (GB)
Title: Improvements relating to boxes for containing electric switches, fuses and the like
IPC: F16B21/02
Filed: 1930-12-03
Abstract: 367,071. Bolts. CRABTREE, J. A., Endwood, Little Aston Park, Sutton Coldfield. Dec. 3, 1930, No. 36406. [Classes 44 and 89 (i).] The cover a7 of a box a is fastened to the box by means of a swing bolt b which engages a forked lug a<6> on the cover in the usual manner and is pivoted to a concave lug a<1> projecting from the bottom of the box. In assembling, the lower end of the rod b which has in the form shown been flattened and then slotted, is inserted through a slot a<4> in the lug a<1> and then opened out so that the bolt cannot be withdrawn upwards. Withdrawal downwards is prevented by a washer c. In a modification, Fig. 5 (not shown) flattened projecting portions are formed on the rod b which are adapted to rest above the lug a<1> and the extreme end of the rod b is split and opened out after insertion.
Patent GB-337243-A (GB)
Title: Improvements relating to hat or other cases, hand bags, holdalls and the like
IPC: A45C13/40
Filed: 1929-11-28
Abstract: 337,243. Brooks & Co., Ltd., J. B., and Snell, G. C. St. J. Nov. 28, 1929. Parcel and like carriers. - A hat or other case, handbag. holdall, or the like is provided with an umbrella or like holder comprising either a tubular sleeve or sheath or a backing carrying loops the holder having a part provided with a slit or aperture to enable it to be detachably secured to the outside of the case by the aid of the carrying loop or handle thereof. Fig. 1 shows a sheath 2, the extended back 2a of which is formed with a slot 6 through which one of the straps 3, 4, which ane connected to form the carrying handLe of the hat case 1, is passed. The lower end of the sheath may be attached to the case by a press-button. Fig. 4 shows a sheath 2 provided with a. slitted extension 8 adapted to be passed over the carrying handle 13 of a suit case.
Patent GB-939242-A (GB)
Title: Monoazo dyes and their use as colour couplers in photographic emulsions
IPC: G03C7/333
Filed: 1959-10-27
Abstract: The invention comprises monoazo dyes of formulae <FORM:0939242/IV(a)/1> and <FORM:0939242/IV(a)/2> wherein X is 0-4, Y is 0 or 1, R1 is a phenyl, alkylphenyl or alkyl-substituted phenoxyphenyl radical, R2 is an alkyl group having 1-4 carbon atoms and R3 is an alkyl group having 1-12 carbon atoms.  The dyes are magenta-coloured cyan-forming couplers and are used in photo-graphic silver halide emulsions (see Group XX).  The dyes are prepared by coupling a 1-hydroxy-2-naphthamide with a suitable diazo-nium compound.  In an example 1-hydroxy-2-naphthanilide is dissolved in pyridine and coupled with diazotized o-aminoacetophenone.  The preparation of a number of dyes of the above formulae is described. Specifications 536,577, 586,211, 598,174, 598,627, 599,377, 617,247, 627,814, 635,841, 702,255, 711,488 and 738,138 are referred to.
Patent GB-1504237-A (GB)
Title: Torque monitoring
IPC: F01D21/00
Filed: 1976-09-02
Abstract: 1504237 Simulating turbine - generators KRAFTWERK UNION AG 2 Sept 1976 [30 Sept 1975] 36486/76 Heading G4G The mechanical torque in a shaft 2, 3 interconnecting at least two rotors 1, 4 of a turbine generator set is monitored by means of an analogue computer 8 receiving from transformers 9, 10 signals indicative of the output current and voltage of the generator and delivering to a simulator 12 a signal representing  the electrical torque in the air gap of the generator, this signal then being used in the simulator 12 together with an angular position signal from 13 to provide an output related to the mechanical torque in the shaft. When the mechanical torque exceeds a threshold value detected at 17, the signal is transmitted to a recording system 18, 19 to give an indication of the remaining useful life of the shaft. The computer 8 and simulator 12 use conventional analogue techniques to simulate differential and vector equations known from electrical machine theory and equations describing a mechanical system consisting of rotating flywheels interconnected by torsional springs. Where the turbine generator set has several rotors, e.g. high and low pressure stages and an exciter, a value of torque in each shaft section can be derived from the simulator 12. A system is provided for each phase in a multi-phase generator.
Patent GB-810251-A (GB)
Title: Improvements in indicating device
IPC: G08B5/36
Filed: 1956-11-29
Abstract: 810,251. Two-position electrical indicators. SPERRY RAND CORPORATION. Nov. 29, 1956 [Nov. 29, 1955], No. 36556/56. Class 40 (1) An indicator comprises an opaque body 12 floating in a transparent fluid 11, which body, in response to an electric current through a coil 17, moves downwards to unblock a light source 13. Numerous trivial modifications such as constructing the container of translucent material, instead of transparent material, or constructing it of opaque material with a suitably positioned window of transparent or translucent material are described.
Patent GB-1208779-A (GB)
Title: Improvements in and relating to mounting arrangements in lens units
Inventor: LAWRENCE ERNEST GEORGE
IPC: G02B27/01
Filed: 1967-08-09
Abstract: 1,208,779. Anchored nuts. ELLIOTT BROS. (LONDON) Ltd. 25 July, 1968 [9 Aug., 1967], No. 36573/67. Heading F2H. [Also in Division G2] A reflective member 13, e.g. a prism, can be accurately positioned relative to an input lens system 12 and an output lens system 14 in a head-up display unit by a mounting arrangement comprising a member 17, which is cemented or otherwise adhered to the reflective surface of the member 13, and three separate mounting means 18. Each means 18 allows fine adjustment of the reflective member 13 by rotation of an intermediate screwed member 24 inside a further screwed member 25, member 24 having a part-spherical flange 24a engaging a hemispherical nut housing. The adjusted position is maintained by tightening a screw 23 into engagement with a nut 19 in the housing 20, the nut being prevented from rotation by projections 22a on a washer 22.
Patent GB-854956-A (GB)
Title: Aromatic sulphonyl amino compounds containing trifluoromethyl radicals
IPC: C07C311/15
Filed: 1957-11-25
Abstract: The invention comprises aromatic sulphonylamino compounds containing the trifluoromethyl radical-CF3 and having the general formulae: <FORM:0854956/IV(b)/1> wherein X stands for hydrogen, chlorine or the trifluoromethyl radical-CF3, at least one X being CF3, R stands for a chloroalkyl-, chlorocycloalkyl-, chloroaryl-, or chloroaralkyl radical, and Y stands for a diphenyl linkage or for O, S, SO, SO2, or CH2.  The compounds are obtained by reacting monoof bi-nuclear aromatic amines, substituted in a nucleus with CF3, with the appropriate chloro-sulphochlorides followed, if desired, by direct chlorination.  The compounds are effective protective agents against textile pests, fungi, and bacteria (see Group VIII).  In Example 1, a pyridine solution of 41-chloro-4-trifluoromethyl-2-amino-1,11-diphenyl ether is treated at 0 DEG C. with chloromethane-sulphochloride. After standing for 12 hours at room temperature, the solution is poured into water whereby a precipitate comprising 41chloro-4-trifluoromethyl-2-chloromethane-sulphonylamino-1, 11-diphenyl ether is obtained.  In Example 2, the product of Example 1 is dissolved in glacial acetic acid, and subjected to direct chlorination using ferric chloride as catalyst, whereby another chlorine atom is introduced into the molecule.  Example 5 describes the condensation of 2, 4, 5-trichlorophenol with 3-nitro-4-chloro-benzotrifluoride, the reduction of the nitro condensation product to the corresponding amine, and the reaction of the latter with chloromethane-sulphochloride to yield 4-trifluoromethyl-2-chloromethane-sulphonamino-21, 41, 51trichloro-1, 11-diphenyl ether.  When 2, 4, 5-trichlorothiophenol is employed in place of the trichlorophenol there is obtained 4-trifluoromethyl-2-chloromethane-sulphonylamino-21, 41, 51-trichloro-1, 11-diphenylsulphide, and this may be oxidized to the corresponding sulphoxide or sulphone. In Example 9, chloromethane sulphochloride is reacted with 2-fluoro-5-trifluoromethyl aniline to yield 2-fluoro-5-trifluoromethyl-1-chloromethane sulphonylaminobenzene. This example also refers to the preparation of 2-chloro-5-trifluoromethyl-41-chlorophenylsulphonyl -aminobenzene; also the corresponding 31, 41-dichloro-and 21, 41, 51 trichloro-compounds.  Specifications 702,602, 709,455 and 738,758 are referred to.
Patent GB-748070-A (GB)
Title: Improvements in or relating to methods of manufacturing ferromagnetic cores having substantially rectangular hysteresis loops
IPC: C04B35/26
Filed: 1954-12-20
Abstract: 748,070. Magnetic compositions. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 20, 1954 [Dec. 21, 1953], No. 36757/54. Drawings to Specification. Class 38 (2). A magnetic core is made of a composition having a substantially rectangular hysteresis loop, a value of coercivity not greater than 4 oersted, and a formula Cu x Ni( 1-x )Fe 2 O 4  wherein x lies between 0.01 and 0.05. Cu, Ni and Fe compounds, e.g. CuO, NiCO 3  and Fe 2 O 3  after grinding in alcohol and preheating in air at 900‹ C. are reground and heated in an atmosphere containing more than 50 per cent by volume of oxygen, at a temperature between 1375‹ C. and 1450‹ C., e.g. 1400‹ C. for 2 hours. Examples are mentioned with values of x equal to 0.01, 0.03 and 0.05.