baber/WOPTO huggingface dataset:
Patent GB-1393667-A (GB)
Title: Variable frequency oscillator
IPC: H03K4/02
Filed: 1973-10-02
Abstract: 1393667 Digital to frequency converter SIGNETICS CORP 2 Oct 1973 [18 Oct 1972] 46016/73 Heading G4H [Also in Division H4] A multivibrator T1, T2 Co has its frequency variable continuously by an analogue input at D, E and in steps by a digital input at J, K, L, M. T1 and T2 are cross-coupled by T11 and T12, and the frequency is determined by Co and by the currents IT through T1, T2. Each of the currents IT is made up of a component I 2 , determined by the analogue input at D, E which differentially controls T3 + T4 and T5 + T6, and a component I 3  which is digitally controlled. Four emitter-coupled pairs T15-T22 (also Fig. 5, not shown) formed from two multiemitter transistors have a common base bias, and have differently weighted emitter resistors K12-R15 so proportional as to give a total collector current dependent upon the 4-bit binary number applied at JKLM. Thus the currents I 3 , and hence the frequency, vary in steps according to the binary number. T9, T10 providing constant current to the analogue input transistors, T3-T6, also receive the same base bias as T15-T22, from R4, D4, D5, D6. To make the multivibrator responsive to only the analogue input, JKLM are disabled to make I 3  zero and the ends A, B of Co are connected by equal resistors (R s  Fig. 6, not shown) to a fixed voltage V s . A square wave output is taken off by emitter followers T13, T14; and a sawtooth by T7, T8. The sawtooth may be clipped D10, D11 to round it off and approximate to a sine wave.
Patent GB-1441649-A (GB)
Title: Nozzles
IPC: B05B1/12
Filed: 1973-10-03
Abstract: 1441649 Nozzles THOMAS GLOVER & CO Ltd 24 Sept 1974 [3 Oct 1973] 46243/73 Heading B2F A nozzle for a fire-fighting hose, comprises a handle portion 10 and a body portion 11, with a centrally disposed valve 12 engaged with the handle portion so as to rotate therewith relative to the body portion, the valve having a stem 36 terminating in a flange 37 adapted to cooperate with the nozzle outlet 16 to provide either jet or spray discharge. Body 11 is secured in handle 10 by a locking ring 13. The body 11 is internally screw-threaded at 27. The valve 12 comprises a cruciform part 29 externally threaded at 30 to engage with thread 27, and discs 31, 32 defining between them a groove 33 accommodating an O-ring 34. Four equally spaced slotted extensions 35 on the periphery of disc 32 engage with four inwardly directed axial ribs 19 in the handle, preventing relative rotation between valve 12 and handle portion 10. In the closed position of the valve Fig. 1, the upstream side of disc 31 is in contact with the outlet end 26 of body 11, O-ring 34 acting as a seal to stop flow. Rotation of handle portion 10, relative to body 11, causes valve 12 to advance under the influence of threads 27, 30. The position of flange 37 in outlet bore 16 determines the production of either jet, Fig. 2 (not shown), or spray, Fig. 3 (not shown).
Patent GB-1348660-A (GB)
Title: Laminated films and methods for the preparation thereof
IPC: B32B27/00
Filed: 1971-10-05
Abstract: 1348660 Laminates CONTINENTAL CAN CO Inc 5 Oct 1971 [19 Oct 1970] 46283/71 Headings B5A and B5N A laminated heat sealable film comprises an olefin polymer base layer with a continuous coating of a vinylidene chloride polymer bonded to one surface thereof, a continuous intermediate layer of a first ethylene/vinyl acetate copolymer containing not less than 10% by weight of vinyl acetate bonded to the vinylidene chloride polymer and a top layer of a second ethylene/vinyl acetate copolymer containing not more than 10% vinyl acetate bonded to the intermediate layer. The intermediate layer is extruded between the coated surface of the base layer and the film forming the top layer and laminated thereto in passage between rolls, at least one of which is below the fusion temperature of the ethylene/vinyl acetate copolymer. The base layer may be an ethylene/vinyl acetate copolymer containing between 1 and 10% of vinyl acetate, polyethylene or an oriented polypropylene. The coating may be a vinylidene chloride polymer containing a copolymerizable ethylenically unsaturated monomer and may be applied to the base layer as a solution and dried. The coated base layer is stored on rolls and then unwound, exposed to a jet of air on its uncoated surface before being used to form the laminate, to remove solvent.
Patent GB-1470209-A (GB)
Title: Method of extinguishing latent image on photographic material  allowing recording of another image on same material
IPC: G03C1/675
Filed: 1974-10-28
Abstract: 1470209 Photographic processes MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 28 Oct 1974 46531/74 Heading G2C A photographic process in which a material comprising a support coated with a layer of particles of carbon tetrabromide and N-vinyl carbazole dispersed in a hydrophilic binder is (a) imagewise exposed to a first light, e.g. 300-400 mm, to produce a first latent image, (b) uniformly or at least partly heated to between 60‹ and 120‹C but above the above melting point to remove entirely or partly the latent images and (c) imagewise exposed to produce a second latent image; steps (a) and (c) being such that blanket exposure to another light, e.g. above 540 mm, and heating are required to produce a visible, coloured image. The material may be heated to between 60 and 120‹C before step (a). Generally the second latent images developed but two images may be obtained if the material is partially covered with an opaque sheet after step (a), exposed to the second light and heated to between 60 and 120‹C to develop the latent image in the uncovered areas and remove the latent image in the covered areas, followed by imagewise exposure to a second image using the first light, blanket exposure to the second light and heating to produce a second image. Exposure to the second light and heating may be achieved simultaneously if the opaque sheet is black paper which absorbs the red light of the second exposure.
Patent GB-949264-A (GB)
Title: Improvements relating to the pressing of articles from powdered material
IPC: B28B3/02
Filed: 1961-12-29
Abstract: 949,264. Pressing ceramic ware. J. WALLEY. Dec. 21, 1962 [Dec. 29, 1961], No. 46551/61. Addition to 828,725. Heading B5A. The invention of the parent Specification is modified in that one of the dies, e.g. the top die 27 is provided with a peripheral ring 34 which meets and abuts the periphery of the other die to prevent any dust from being blown out from between the dies before they are in pressing engagement. The ring is loaded by a coil spring 31 so as to yield under pressure. The ring may be made of a resilient or flexible material. The invention is described as applied to a rotary table machine having a loading station below a hopper containing the clay dust.
Patent GB-1191900-A (GB)
Title: Heptadienoic Acid Derivatives and their preparation
IPC: C07C51/08
Filed: 1967-10-12
Abstract: 1,191,900. Heptadienoic acid derivatives. RHONE-POULENC S.A. 12 Oct., 1967 [12 Oct., 1966; 24 Feb., 1967 (2)1, No. 46675/67. Heading C2C. The diacid 2-carboxy-4,4,6-trimethyl-2,5-heptadienoic acid is prepared by the hydrolysis of the corresponding diesters, cyanoester, or cyano acid, e.g. ethyl 2 - ethoxycarbonyl - 4,4,6 - trimethyl - 2,5 - heptadienoate, and 2 - cyano- 4,4,6 - trimethyl - 2,5 - heptadienoic acid. The diesters may be prepared by (1) condensing 2,2,4 - trimethyl - 3 - pentenal or 2,2,4 - trimethyl-4-pentenal with dialkyl malonate in the presence of ammonium acetate followed by rearrangement by heating with acid, (2) the oxidation of a sulphide, e.g. 1-phenylthio-3-methylbut-2-ene with hydrogen peroxide to a sulphone, phenyl-(3-methylbut-2-enyl) sulphone, which is reacted with an alkyl-magnesium halide and the resulting derivative condensed with alkyl isopropylidene-malonate, if desired, in the presence of a cuprous salt, hydrolysed to give mixtures of isomers.
Patent GB-1404206-A (GB)
Title: Densitometer
IPC: G01N9/00
Filed: 1972-10-11
Abstract: 1404206 Measuring density electrically ITT INDUSTRIES Inc 11 Oct 1972 [13 Oct 1971] 46785/72 Heading G1N The invention relates to apparatus for measuring the density of a fluid of the type described in Specification 1328888 wherein a plate 20' Fig.2 located in the conduit 19' carrying the test fluid is made to vibrate at its natural resonant frequency by A.C. energization of a magneto-strictive tube 21', the vibrations being sensed by a Piezo-electric crystal 30'. The A.C. signal from crystal 30' is fed through a filter 109 Fig. 7, whose band pass frequency is automatically adjusted to include the fundamental of its input, fed back to the driver coil 104 and also fed to a linearizing circuit 100, where the resonant frequency f is converted to a periodic time T and operated on to produce a density signal E = AT<SP>2</SP> + CT + B, where A, B and C are predetermined constants. The circuitry also includes self-starting means 117 and an oscillator 116 for checking calibration.
Patent GB-1254965-A (GB)
Title: Expandable spreader and grappling device for cargo containers and trailers
Inventor: FATHAUER JACK E
IPC: B66C1/10
Filed: 1969-09-23
Abstract: 1,254,965. Spreaders for lifting containers. MIDLAND-ROSS CORP. 23 Sept., 1969 [7 Oct., 1968], No. 46843/69. Heading B8H. A spreader for handling containers 5, Fig. 1, comprises a pair of carriages 31, 32, movable along a pair of rails 6, which have rotatable corner couplings and pivoted grappling arms 48, 49. The carriages are moved along the rails 6 by-rams 81, 82, Fig. 2, and run on rollers which engage both the upper and lower surfaces of the lower flanges of the rails. The grappling arms are rotated between the position shown in Fig. 1 and their operative position by rams 65, which rotate a shaft supporting the arms either through a lever fast to the shaft or through a rack and pinion mechanism. The arms are pivoted between the two positions shown in Fig. 7 by rams 53, 54.
Patent GB-1245614-A (GB)
Title: Photographic materials
Inventor: TUITES RICHARD CLARENCE
IPC: C08G69/26
Filed: 1968-10-03
Abstract: 1,245,614. Polymers containing tetrazolylene or tetrazolyl groups. EASTMAN KODAK CO. 3 Oct., 1968 [9 Oct., 1967], No. 46897/68. Head ings C3P and C3R. [Also in Division G2] Polymers containing 1,5-tetrazolylene or 5- tetrazolyl groups, which may optionally be substituted in the tetrazole nucleus, are used as antifoggants in photographic materials (see Division G2). The preparations of the following polymers are illustrated: (a) A polymer containing repeating units of the formula is obtained by polycondensing 1-(4-aminophenyl) - 5 - (4 - aminoanilino) - tetrazole with adipyl chloride in dimethylacetamide. (b) A polymer containing pendent tetrazolyl groups is obtained by after-treating polymethacrylonitrile with sodium azide in dimethylformamide. (c) A polymer containing pendent phenyltetrazolyl-thiocarboxylic ester groups is obtained by reacting polyacrylic anhydride with the sodium salt of 1-phenyl-5-mercapto-1H- tetrazole in dimethylformamide. (d) A polymer analogous to that in (c) is obtained substituting copoly(ethylene-maleic anhydride) for the poly(acrylic anhydride) as starting material. (e) A polymer containing pendent phenyltetrazolyl mercapto-acetate groups is obtained by treating polyvinyl alcohol with chloroacetic anhydride to yield polyvinyl chloroacetate and reacting the latter with 1-phenyl-5-mercapto- 1H-tetrazole sodium salt in dimethylformamide.
Patent GB-995953-A (GB)
Title: Improved process for the production of carboxylic acids
IPC: C07C51/14
Filed: 1963-11-28
Abstract: Carboxylic acids are made by reacting an olefin with carbon monoxide in the presence of a liquid, highly acid, inorganic acid catalyst, and hydrolysing the reaction product, the liquid phase being maintained under an atmosphere of carbon monoxide under a pressure of 10 to 600 atmospheres and the olefin feed being introduced above the liquid interface at a rate no greater than the rate of olefin conversion in the reaction.  Suitable catalysts include concentrated sulphuric acid, phosphoric acid and hydrofluoric acid, but the preferred catalyst is boron fluoride combined in water in molar ratios of at least 1 : 1 and preferably 2 to 2.5 : 1.  Any mono-olefinic compound containing 3-20 carbon atoms may be used. Preferably the olefin concentration in the reactant mixture is maintained below 5 weight per cent, most preferably below 2 weight per cent.  A suitable apparatus is described.  The process may be operated batchwise, or continuously with a holding time of at least one hour, preferably two to four hours.  In examples, a propylene trimer is converted to a C10 acid, and isobutylene is converted to pivalic acid.
Patent GB-961102-A (GB)
Title: Electric toggle switch
Inventor: IACCARINO CARL JOSEPH
IPC: H01H23/26
Filed: 1962-12-13
Abstract: 961,102. Retractive switches. J-B-T INSTRUMENTS Inc. Dec. 13, 1962, No. 47130/62. Heading H2B. In an electric toggle switch, the switch operating lever 32 is biased to one side of the switch case by a coil spring 50 in a U-shape wrapped round an arm portion 34 of the lever 32 with the ends of the spring attached to arms 60 of an angle bracket connected to the switch case. As the lever 32 is pivoted a plunger 38 in the arm portion 34 pivots a metal switch arm 40 in a bracket 42 secured to the bottom wall 44 of the case so that the switch arm 40 engages stationary contact 48. A slotted retainer plate 68 is provided for holding the spring 50 in engagement with the arm portion 34.
Patent GB-1405957-A (GB)
Title: Membranes comprising a porous support and a film of fluorine-containing polymer
IPC: B01J47/12
Filed: 1972-10-12
Abstract: A laminate comprising a first layer of fluorinated polymer containing pendant side chains containing sulfonyl groups wherein the sulfonyl groups are in the -(SO3)nMe form wherein Me is a metallic cation or NH4 and n is the valence of Me and a second layer of fluorinated polymer containing pendant side chains containing sulfonyl groups wherein the sulfonyl groups are in the -SO2M form wherein M is a halogen atom, said second layer being integral with said first layer and containing support material completely encapsulated therein; and a process for preparing such; said laminate being useful as an intermediate for an ion exchange membrane.
Patent GB-1503220-A (GB)
Title: Control of corrosion in aqueous systems by the use of an oxygen scavenger
IPC: C23F11/14
Filed: 1975-11-14
Abstract: 1503220 Amine oxygen scavengers CHEMED CORP 14 Nov 1975 [17 March 1975] 47141/75 Heading C1C [Also in Division C7] A method for control of corrosion in an aqueous system comprises adding an effective amount of an oxygen scavenger wherein R 1 , R 2  and R 3  are the same or different and are selected from H, lower alkyl and aryl, or watersoluble salts thereof (selected as given below). 0À001 to 500, preferably 0À01 to 50, parts per million parts of water of oxygen scavenger are added. The lower alkyl have 1-8C, and the aryl may be phenyl, benzyl or tolyl. The salts may be chloride, sulphate, acid sulphate, phosphate and sulphite. Compounds named are hydroxylamine, N,N-diethylhydroxylamine, ethylhydroxylamine, N,N-dimethylhydroxylamine, O-methylhydroxylamine, O-hexylhydroxylamine, N-heptylhydroxyl amine, N-dipropylhydroxylamine, O-methyl- N,N-diethylhydroxylamine, N-octylhydroxylamine, O-ethyl-N,N-dimethylhydroxylamine, N-methyl-N-ethylhydroxylamine, N-butylhydroxylamine, N-benzylhydroxylamine (#-benzyl hydroxylamine) and O-benzylhydroxylamine (α-benzylhydroxylamine).
Patent GB-1278519-A (GB)
Title: Production of sodium perborate
Inventor: REILLY VICTOR JOSEPH
IPC: C01B15/12
Filed: 1969-09-25
Abstract: 1278519 Sodium perborate E I DU PONT DE NEMOURS & CO 25 Sept 1969 [25 Sept 1968] 47328/69 Heading C1A A process for the production of sodium perborate comprises adding to an aqueous slurry of sodium perborate in a first crystallization zone aqueous solutions of sodium metaborate and hydrogen peroxide in such quantities as to maintain a concentration which is at least 0À1 molar in excess of the concentration which would result in a stoichiometrically equivalent amount of sodium metaborate to the hydrogen peroxide, then passing the slurry to at least one further crystallization zone, where further hydrogen peroxide is added so as to reduce by at least 20% the sodium metaborate excess. The hydrogen peroxide is suitably added in the form of a solution of 20% wt. concentration or more, and the sodium metaborate should preferably be in a concentration of between 2 and 4 moles/ litre. The concentration of the excess of metaborate in the first crystallizing zone may be up to 1 molar, and the hydrogen peroxide added in the subsequent zone or zones may be sufficient to reduce the concentration of the excess sodium metaborate by up to 100%. The reactions may be carried out at a temperature between 5 and 50 C.
Patent GB-989772-A (GB)
Title: Isoxazole derivatives and improvements in or relating to their production
IPC: C07D261/08
Filed: 1963-12-02
Abstract: Phenyl-isoxazole carboxylic acids of the formula <FORM:0989772/C2/1> wherein R is a phenyl group, R1 is hydrogen or a C1-5 alkyl group and n is 1 or 2 are prepared by reacting a carboxylic acid halide of the formula <FORM:0989772/C2/2> wherein X is halogen, with diazomethane in an inert solvent at - 10 DEG  to 50 DEG  and reacting the resulting diazomethyl ketone of the formula <FORM:0989772/C2/3> with water or an alkanol having 1-5 carbon atoms at a temperature between room temperature and reflux temperature.  Preferably, the reaction with diazomethane is carried out in the presence of a tertiary nitrogenous base or excess of the diazomethane and the reaction with water or the alkanol is effected with the aid of a silver oxide or silver benzoate catalyst.  The acid halides of the Formula II may be made by oxidation of the alcohol to the acid with chromic acid followed by halogenation with phosphorous pentachloride.  The compounds of Formula I can be converted to dialkyl amino compounds of the formula <FORM:0989772/C2/4> by reduction with a metallic hydride to the alcohol, halogenation with thionyl halide and condensation of the halide with HNR11R111, where R11 and R111 are lower alkyl groups.
Patent GB-1111377-A (GB)
Title: Automatic gain control circuits
IPC: H03G1/00
Filed: 1966-10-25
Abstract: 1,111,377. Automatic gain control. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 25 Oct., 1966 [28 Oct., 1965]. No. 47842/66. Headings H3T and H4R. In an automatic gain control circuit a signal is applied from input circuit 2, 3 to a first transmission path including a mainly resistive impedance 5 and a considerably greater signal is applied to a second transmission path which includes a variable impedance element 6 whose impedance is controlled in accordance with the signal amplitude; the signal voltages in the two transmission paths are combined in phase opposition such that with high amplitude signals they substantially cancel out. The impedance of the variable impedance element is so controlled that it decreases with an increase in signal amplitude to provide an increase in the damping across the tuned circuit. As shown, the resistive element 5 and variable impedance diode 6 are fed from a secondary transformer winding with an earthed tap which is offset from the centre. In another embodiment the resistive element is fed from a secondary winding and the diode from a tap on the primary; in this case the diode obtains its control voltage from a resistor in the collector circuit of a subsequent transistor stage, the base bias of which is varied so as to vary its gain (Fig. 3, not shown).
Patent GB-1522196-A (GB)
Title: Preparation and use of aromatic diester-diamides
IPC: C07C67/00
Filed: 1975-11-24
Abstract: 1522196 Polyesteramides INSTITUTFRANCAIS DU PETROLE 24 Nov 1975 [25 Nov 1974] 48206/75 Heading C3R [Also in Division C2] Polyester amides and copolyester amides are prepared by condensing at least one diester diamide of the general formula where Ar and Ar<1> are divalent aromatic radicals of 5-20 carbon atoms comprising one or more aromatic rings, joined or linked through a direct carbon-carbon bond or a divalent atom or group prepared by reacting a hemiester of an aromatic diacid of the general formula where Ar is as hereinbefore defined, with an aromatic di-isocyanate of the general formula where Ar<1> is as hereinbefore defined, in a molar ratio of the hemiester to the di-isocyanate of about 2 : 1 on at least one diol under the usual transesterification conditions. Examples describes (A) the polycondensation of 2,4-N-N1- bis-(p-methoxycarbonyl benzoyl) diamino toluene with (a) ethylene glycol, (b) 1,6-hexamethylene diol, (c) methyl terephthalate, (d) 1,10-decane diol, (B) 4,4<1>-N-N<1>-bis) m-methoxycarbonyl benzoyl) diamine diphenyl ether with (a) ethylene glycol and (b) methyl terephthalate.
Patent GB-1060079-A (GB)
Title: Improvements in and relating to fasteners
Inventor: SECKERSON CLIFFORD ALEXANDER
IPC: B60R13/02
Filed: 1962-12-21
Abstract: 1,060,079. Stud & socket fastenings. F. T. PRODUCTS Ltd. Dec. 17, 1963 [Dec. 21, 1962], No. 48423/62. Addition to 1,036,423. Heading E2B. A fastener comprises a stud formed from a synthetic plastics material and having a head 15, and a shank 16 extending therefrom, the head 15 having a substantially circular and resilient main flange 18 adjacent the shank and a substantially circular retaining flange 17 spaced along the length of the head from the main flange, wherein the main flange is of greater diameter than the retaining flange and the shank is formed with a shoulder 25 intermediate its length, a longitudinal slot extending through the shoulder so as to allow the stem to collapse radially in the region of the shoulder and a circumferentially continuous nose 19. As shown in which the slot (23) Fig. 3 (not shown) is substantially W-shaped, the fastener is used to secure a trim pad 11 to a panel 12, the former having a key hole slot 27 of which a narrow portion is snap engaged by the head 15 prior to the engagement of the stem 16 with an aperture 26 in the panel 12. In another arrangement Figs. 6 and 7 (not shown), the stem, which is shorter than that of the first arrangement, is provided with a plain slot.
Patent GB-1484166-A (GB)
Title: Rolling mill stand
IPC: B21B31/10
Filed: 1974-11-11
Abstract: 1484166 Rolling mills BLAW-KNOX FOUNDRY & MILL MACHINERY Inc 11 Nov 1974 [4 Dec 1973] 48699/74 Heading B3M A rolling mill with work rolls carried in removable chocks 14 and 16, Fig. 2, has its housing windows extended inwardly at 31 to provide extensions 35, 37 and 39 which house balancing and crown-control pistons 36, 52 and 50 acting on ears 40 and 42 of the chocks. The pistons are shown in their retracted positions prior to a roll changing operation. Each extension 37 houses two sets of pistons 50 with a position transducer assembly 70, Fig. 4 located between them. The assembly includes telescopically arranged housing parts 74 carrying pins 76 and 78 which normally follow movement of the chock ears 40 and 42 to provide (via a transducer 72) a measure of the chock spacing. The pins are automatically disengaged from the ears when the chocks are moved apart for roll changing. The outputs from the two transducers in each housing are used to control the hydraulic force applied to a lower backing roll to provide workpiece gauge control. The housing parts 74 are biased apart by a spring or by a supply of gas or air under pressure.