baber/WOPTO huggingface dataset:
Patent GB-701863-A (GB)
Title: Improvements in or relating to circuits for protecting amplifiers from overload
IPC: H03F1/54
Filed: 1951-10-10
Abstract: 701,863. Valve safety and alarm circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 10, 1951 [Oct. 13, 1950], No. 23565/51. Class 40 (6) In an amplifier two negative feedback circuits with biased rectifiers are employed, the first dependent on output voltage and the second on output current to prevent overloading of the valve. The circuit is described as applied to a carrier amplifier in which a valve 1 feeds a load 4 over a transformer 3, a winding 5 biased by battery 7 supplying a rectifier 6 which conducts when the output voltage is sufficiently great to provide voltage feedback to the grid. In a similar manner transformer 9, winding 10 and rectifier 11 provide current feedback. When the amplifier is operating as a standby, the secondary of transformer 3 is short-circuited and the voltage feedback is inoperative but the current feedback is effective, thus preventing overloading. Whilst the circuit is operating correctly, a positive potential is built up across filter 14 by rectifier 15 which neutralizes the bias from battery 16. If neither a sufficient output voltage or current exists, the D.C. potential across the filter 14 falls and the negative bias from battery 16 reduces the current in valve 1 so that an alarm relay 17 releases. In normal operation rectifier 8 is maintained conducting.
Patent GB-707856-A (GB)
Title: Improvements in or relating to electromagnetic transducers
IPC: G11B5/29
Filed: 1952-09-19
Abstract: 707,856. Magnetic recording and reproducing apparatus. WESTERN ELECTRIC CO., Inc. Sept. 19, 1952 [Sept. 28, 1951], No. 23574/52. Class 40 (2). In a magnetic transducer having a number of separate heads 15, 16, 17 mounted side by side across the direction of travel of the record medium for the production of multitrack records, interference between the heads on account of fring- ing is reduced by interposing magnetic shields 35, 36, 37 between the heads except for a limited area adjacent to the magnetic gaps, in which region low reluctance members 45, 47, are arranged connecting the leading pole of one head to the trailing pole of an adjacent head.
Patent GB-366926-A (GB)
Title: Method and apparatus for separating substances from a gaseous medium
IPC: B04C5/14
Filed: 1930-08-07
Abstract: 366,926. Centrifugal gas cleaners. TRIGGS, W. W., 5'7, Lincoln's Inn Fields, London.-(Elektriska Svetsnings Aktiebolaget; Gothenburg, Sweden.) Aug. 7, 1930, No. 23663. [Class 23.] Apparatus for separating solid or liquid impurities from a gaseous medium comprises a separating chamber consisting of a cylindrical part 10 and a conical part 11, each communicating through a slot 15, 16, with a collecting chamber 17 formed at its lower end with a discharge opening 18 adapted to be hermetically sealed during operation. The cylindrical part 10 is formed with a tangential inlet 12 and carries an outlet pipe 13 for the purified gas, this pipe extending approximately to the junction of the parts 10, 11; the latter is provided with a closable cleaning aperture 14. In operation, branch currents from the main helically moving stream pass, due to high angular velocity, through the front part of slot 15 and the slot 16 to the collecting chamber 17 in which the impurities are deposited, the purified gas returning to the main stream at its point of lowest angular velocity, i.e. at a zone adjacent the junction of the slots 15, 16.
Patent GB-598278-A (GB)
Title: Wave-signal receiver
IPC: H03D11/02
Filed: 1945-09-13
Abstract: 598,278. Radio receiving circuits. HAZELTINE CORPORATION. Sept. 13, 1945, No. 23685. Convention date, Oct. 13, 1944. [Class 40 (v)] In a receiver in which means are provided for automatically disabling the receiver on failure of the automatic gain stabilization arrangements, a small amount of energy is normally fed from a local oscillator into the gain controlling channel so as to prevent operation of the disabling means when it is desired to disable the receiver momentarily, for example when transmitting. The invention is shown applied to a transponder beacon including a super - regenerative receiver comprising an oscillator 10 having a frequency determining circuit in the form of an adjustable transmission line 13, 14, 15 and supplied with quenching oscillations from a Hartley oscillator 25. The received signal is detected at 32 and passed through a pulse amplifier 40 to trigger a multivibrator unit 86 which generates pulses which, after amplification at 87 serve to trigger an oscillator 70 tuned by balanced transmission lines 73, 74 and 77, 78, to radiate a response signal from a common transmitting and receiving aerial 90 which is coupled by inductance 91 to the frequency determining circuits of oscillators 10 and 70. Part of the output from pulse amplifier 40 is fed to an automatic gain control amplifier 42 which selects the quench frequency component of the quiescent noise signal for rectification at 46 to produce a direct voltage which is applied to vary the conductivity of valve 50. This varies the voltage applied from +B to the anode of oscillator 10 and so varies the gain in accordance with variations in the quiescent noise output. This enables the gain to be stabilized at the optimum value. The voltage at the anode of valve 50 is also fed to the grid of a valve 60 and serves together with a voltage from - B through resistance 61 to maintain valve 60 cut off. If, however, the gain control voltage fails, valve 60 conducts and increases the negative bias on the grid of oscillator 10 due to shunting section 19 of the bias network 19, 20, 21. This prevents false firing of the transmitter 70 if the gain control system fails. To enable valve 10 to be momentarily suppressed, for example while transmitting, without causing cut-off of valve 60, a small amount of quench frequency energy is fed from oscillator 25 through network 43, 44, 45 to pulse amplifier 40 so as to provide an output which, although insufficient to trigger the transmitter 70, provides a gain control voltage sufficient to prevent cut-off of valve 60. Alternatively, cut-off of valve 60 may operate to disable a valve coupling the receiver to the transmitter. Also the gain may be controlled by controlling the amplitude of the quench signal. Specification 598,277 is referred to.
Patent GB-695971-A (GB)
Title: Improvements in apparatus for aircraft-refuelling in flight and aircraft towing
Inventor: GUIVER DENNIS WILLIAM
IPC: B64D39/06
Filed: 1950-09-11
Abstract: 695,971. Refuelling aircraft. FLIGHT REFUELLING, Ltd. Sept. 20, 1951. [Sept. 11, 1950] No. 23691/50. Class 4. [Also in Group XXVIII] An aircraft having a non-extensible, rigid forwardly extending "probe", wherein the probe terminates in a nozzle for refuelling or a towing spigot insertable in a coupling socket trailed by another aircraft, said nozzle or spigot being engaged in the socket by spring latching means which will allow the complementary elements to be forcibly separated, has combined therewith a rigid locating ring mounted for movement between a retracted position in which it surrounds the end of the probe and an extended position in front of and concentric with the probe, and power operated means for retracting and extending the locating ring. The probe, which extends forwardly of the aircraft structure 11, comprises a tube 10 which at its forward end terminates in a tapered nozzle 12 having an external circumferential groove 13 for engagement with rollers 31 mounted on biased latch levers 30 pivoted to the body 29 of the coupling socket. Surrounding and secured to the forward end of the tube 10 is a ring 19 having two diametrically opposed lugs each having a spherically seated bush to support a tube 21 which tubes are arranged for axial sliding movement relative to the tube 10 by the provision of supporting rings 24, 25 each of which carries a plurality of yieldable rollers 26 which roll on the tube 10. The ring 24 has a further lug attached to the extremity of the piston rod 27 of a pneumatic jack 28 and the forward ends of the tubes 21 carry a rigid ring 22 furnished with a rubber buffer 23. When contact has to be made between two aircraft the jack 28 and the ring 22 are extended forward of the probe so that when the ring 22 enters the conical entry on the socket trailed by other aircraft it is automatically secured by rollers mounted on spring biased latches 33, thus centralising the nozzle 12 and the socket 29. When the rear aircraft "closes on" the forward aircraft the pressure in the jack 28 is overcome (or the action of the jack 28 may be reversed) and the nozzle 12 enters the socket 29 and is locked thereto by the rollers 31 engaging the groove 13. Specifications 676,430 and 690,186 are referred to.
Patent GB-1509932-A (GB)
Title: Automatic machine for forming plastics tubes
IPC: B29C53/50
Filed: 1975-05-30
Abstract: 1509932 Tube forming apparatus YOSHINO KOGYOSHO CO Ltd 30 May 1975 [31 May 1974] 23704/75 Heading F2P [Also in Division B5] In an automatic plastics tube forming machine a longitudinally extending film 12 is withdrawn from roll 13 by pinch rollers 6, 6, led around guide roller 14, brake roller 15, tension roller 16, passed through a pre-tube forming means B where the film is given a U- shaped configuration by guide plates 18, 18, then through extrusion means C where a nozzle 21 applies molten resin to one or both the longitudinally extending edges of the film 12 the resin being smoothed and shaped by rollers 22, then through tube forming means E consisting of mandrel 23, guide plate 36 for bringing the edges of the film into overlapping relationship and ring 24 for forming the tube, there being a heater means 38 and rollers 39 protruding through a window in ring 24 to seam the overlapping edges of the film together. The formed tube then passes through a detector 45 for checking the seam for pin holes &c. and the end of the tube contacts a limit switch 29 which activates a cutting device F to cut off predetermined lengths H of tube. The latter fall on to conveying means and are transported to a device for fitting head pieces thereto to form containers. The film 12 may have indicia thereon, the cutter F being synchronized therewith.
Patent GB-876317-A (GB)
Title: Novel resins
Inventor: MARKUS RICHARD LOUIS
IPC: C08F20/08
Filed: 1959-07-10
Abstract: 2-Vinylpyridine is copolymerized with 1,3%-1,8% by weight of a p, p1-diisopropenyldiphenylalkane, specifically p, p1-diisopropenyldiphenylmethane, with azobisisobutyronitrile as catalyst, in an aqueous solution of disodium phosphate.  The resulting resin swells in contact with gastric juices and is used as an appetite depressant when mixed with an edible lubricant, such as an acetylated glyceryl stearate or distearate, and an edible diluent. Specifications 855,004 and 862,419 are referred to.ALSO:An appetite depressant composition comprises a resin obtained by copolymerizing 2-vinylpyridine with 1.3 to 1.8% by weight of a p,p1 - diisopropenyldiphenylalkane, specifically p,p1-diisopropenyldiphenylmethane.  The composition, which may be in the form of a tablet or wafer, may contain an edible polymer lubricant, and a diluent or carrier.  Specifications 855,004 and 862,419 are referred to.
Patent GB-599338-A (GB)
Title: Improvements in or relating to electrical pulse signalling systems
IPC: H04B14/02
Filed: 1945-09-14
Abstract: 599,338. Pulse modulation. JEFFERSON, S. Sept. 14, 1945, No. 23823. [Class 40 (v)] In a pulse-signalling system the time interval between successive pulses is caused to vary from one to another or the other of a plurality of predetermined values, the receiver being provided with responding devices so arranged that a different one responds for each value of the predetermined time intervals. The invention may be applied to a radiolocation system of the type described in Specification 585,347, employing two series of pulses of the same recurrence frequency one for location purposes and the other for interrogation purposes, signalling being effected by varying the timing or phase of one series of pulses B, D,.F, Fig. 1, with respect to the other A, C, E, G. The receiver will also respond to a pulse train of the type shown in Fig. 2, in which consecutive pulses P, Q, R, S have a spacing a time units therebetween and pulses S, T, U, V have a spacing b. A receiver suitable for systems having two different pulse spacings comprises an input circuit T1, C1, R1, Fig. 3, connected directly to the control grids of valves V1, V2, and through delay devices DL1, DL2 respectively, to their screen grids. The devices DL1, DL2 introduce delays a and b seconds respectively so that pulses whose spacing is a will produce coincident pulses on the grids of V1 and corresponding output pulses, while pulses whose spacing is b will similarly produce an output from V2. The output pulses are lengthened in circuits PL1, PL2 respectively, which may be of the type described in Specification 582,758, and fed to the indicating device ID, which may be a perforator or printer responding to a multi-unit code or an illuminated character display panel the characters being selected by incoming signals. Variation in the timing of the transmitted pulses may be accomplished by a circuit of the type described in Specification 584,670, Figs. 6 and 7 (not shown). Specification 582,494 also is referred to.
Patent GB-1021329-A (GB)
Title: Process for producing epsilon-aminocaproic acid
IPC: C07C227/22
Filed: 1964-06-09
Abstract: e -Aminocaproic acid is made by heating an aqueous solution of an alkali metal salt of e -aminocaproic acid, obtained by the hydrolysis of e -caprolactam or nylon-6, with a cation-exchange resin containing a phosphoric, carboxylic or hydroxyl radical. The aqueous solution may be decolourized and refined prior to treatment with the resin. After treatment with the resin the solution may be concentrated and the free acid crystallized.  It is preferred to use ion-exchange resins containing carboxylic groups.
Patent GB-1124836-A (GB)
Title: Stabilization of acrylic and methacrylic monomers
Inventor: GIRVAN IAN JOHN MCAUGHTRIE
IPC: C07C51/50
Filed: 1966-05-27
Abstract: Acrylic or methacrylic monomers are stabilized with a minor proportion of an N-alkyl pyrrole, e.g. N-methyl pyrrole.  Acrylic or methacrylic acids are stabilized and may be esterified in the presence of the stabilizer to the alky acrylates or methacrylates or interacted with alkylene oxides, e.g. ethylene or propylene oxide to form 2-hydroxyalkyl acrylates. The stabilizers may also be present during the purification by distillation of the acrylic and methacrylic acids.  Other stabilizers such as hydroquinone, alkylphenols and alkoxyphenols, e.g. 4-methoxyphenol may also be present.
Patent GB-203887-A (GB)
Title: Improved means applicable for use in the production and application of endless binding hoops or bands in connection with packing cases and other objects
IPC: B65B13/16
Filed: 1922-09-02
Abstract: 203,887. NestlÚ & Anglo-Swiss Condensed Milk Co., and Huguenin, G. Sept. 2, 1922. Parcelling by bundling; bale ties.-Relates to an apparatus for severing a strip of binding material, applying it about a case &c. in a predetermined position, tightening, and joining the overlapping ends by welding. The strip material is drawn from a roll and a length a severed so as to lie in a groove b<x> in a table B, and magnets a<1>, or lateral trigger springs may assist to keep it in position. The ends of the band a lie upon arms F, F<1> pivoted at f, f<1> respectively. These arms are bent upwards and over the case E which has been placed upon the table over the strip so as to dispose the band round the case as shown in full lines in Fig. 4. The ends are then engaged in the clamping devices G, G of a straining mechanism and the band tightened by the rotation of a right and left hand screw g<1> the overlapping ends then lie between electrodes H, H<1> and a current is passed through the high tension circuit I of a transformer. causing a secondary current to flow through the low tension circuit K and through the electrodes H, H', thus welding the ends of the strip. Water is passed through pipes L, M to cool the transformer.
Patent GB-465244-A (GB)
Title: Improvements relating to spectacle frame hinges
IPC: G02C5/22
Filed: 1936-08-31
Abstract: 465,244. Spectacles. HADLEY CO., Ltd., and ROSSER, G. D. Aug. 31, 1936, No. 23858. [Class 97 (i)] A hinge for an artificial shell spectacle frame comprises a part composed of two lugs and an anchoring portion running from the lugs into the material of the front and wholly embedded therein, the lugs and anchoring portion being bent from a single piece of sheet metal and the lugs being tightened into contact with the flat surfaces of a lug on the other part of the hinge by flat abutment surfaces independent of both hinge halves. Fig. 5 shows the member which enters the front, comprising lugs 3, 4 extending from a base 5 and anchoring extensions 6, 7 with enlarged ends. Portions 12 extending from the lugs to the end of the base constitute bevel stops for the side 2. The hinge member carried by the side has a single lug 8, Fig. 4, passing between the lugs 3, 4, the parts being secured in position by flat washers 9, 10 and a rivet 11.
Patent GB-1187122-A (GB)
Title: Polyelectrolyte Structures.
Inventor: MICHAELS ALAN SHERMAN
IPC: C08J5/22
Filed: 1967-06-08
Abstract: 1,187,122. Polyelectrolyte films. AMICON CORP. 8 June, 1967, No. 23878/67. Heading B5B. [Also in Division C3] Films are made by forming into the desired shape, e.g. by casting on a glass plate, an aq. solution containing at least 0À2% by wt. of a synthetic organic polymer having dissociable anionic groups attached to a polymeric chain which without these groups is a waterinsoluble film forming resin, at least 0À5% by wt. of a synthetic organic polymer having dissociable cationic groups attached to a polymeric chain which without these groups is a waterinsoluble film forming resin, each of these polymers having sufficient dissociable groups to render it water soluble in the absence of the other, at least 10% by wt. of an electrolyte having a volatility at least as great as that of these polymers and having a pK less than 2À0, and evaporating the electrolyte to cause the solution to form a solid gel. In the examples the first polymer was poly (sodium styrene sulphonate) and the second polymer (vinyl benzyl trimethyl ammonium chloride), the electrolyte was hydrobromic acid or hydrochloric acid, and the aq. solution also contained 1,4-dioxane.
Patent GB-1428215-A (GB)
Title: Portable vertrbral column support
IPC: A47C7/40
Filed: 1973-05-18
Abstract: 1428215 Upholstery R U LIGHT 18 May 1973 [13 Nov 1972] 23903/73 Addition to 1295129 Heading A4M A device for supporting the users back, e.g. in chairs or beds, comprises a pad having longitudinally extending rigid members 12....15 enclosed in flexible material and spaced to provide a central flexible part for receiving the users spine The members 12.... 15 may be disposed in moulded resilient material 11, e.g. rubber or plastics, and they may be of wood, plywood, plastics, or metal and may be rectangular, laminated, tubular or corrugated. One side of the device may be padded and the other unpadded. In a second embodiment, Fig. 4 (not shown), the members 12 .... 15 are inter-connected by sheet material secured by adhesive. The device may include an enclosing cover. In a third embodiment Fig. 5 (not shown), the members 13, 14 are replaced by tubes inter-connected by a central web providing the central flexible part. In a fourth embodiment, Fig. 6 (not shown), two rigid corrugated metal members are provided. When the device is folded for carrying it may be fastened in this position by straps, snap buttons or, zippers.
Patent GB-1038018-A (GB)
Title: Improvements in and relating to cartons
IPC: B65D77/20
Filed: 1964-06-09
Abstract: 1,038,018. Packaging; cartons. E. DUNHILL. May 31, 1965 [June 9, 1964], No. 23910/64. Headings B8C and B8D. A carton lid is held in place by projections pressed out of the carton wall after the lid is in place. The body 1 may have a rolled rim 2 and lid-receiving groove 3, apertures 5 being pierced in its wall to form lid-retaining tufts. The carton may contain seed in a growing medium and have holes 7 in the lid 4, Fig. 1 (not shown), for addition of water. A drainage hole 8 is provided. Lid securing apparatus comprises a plunger 10 for pushing home the lid 4, the plunger being depressed against a light spring (not shown) when a member 13 is pressed down. When the lid is positioned, the member 13 slides along the plunger against a spring 14 and causes arms 11, mounted on the plunger, to swing inwards so that piercing elements 12 form the apertures 5.
Patent GB-1242819-A (GB)
Title: Improvements in or relating to line equalizers for telecommunications systems
IPC: H04B3/14
Filed: 1970-05-19
Abstract: 1,242,819. Line length equalizer. SIEMENS A.G. 19 May, 1970 [20 May, 1969],No. 24047/70. Heading H4R. Line length equalizer, for installation in a subscriber's set to adjust the attenuation to suit the line length to which the set is connected, comprises a transistor T whose emitter-collector path is connected, in series with the line and whose base is biased by diode D1 and resistor R4 so that the impedance of the collector emitter path varies inversely with line length, together with two shunt impedances, arranged one each side of the transistor series impedance, and arranged to vary in impedance with line length, the combination presenting the same impedance both to the subset and to the line.
Patent GB-1460751-A (GB)
Title: 3-indolyl-3-phenyl-phthalide compounds their manufacture and their use
IPC: B41M5/145
Filed: 1973-05-21
Abstract: 1460751 Colour formers CIBA-GEIGY AG 26 March 1974 [21 May 1973] 24077/73 Heading C4P The invention comprises colour formers of the general formula wherein R 1  and R 2  are H, C 1 -C 12  alkyl, C 2 - C 8  alkoxyalkyl, C 5 -C 6 -cycloalkyl, benzyl or phenyl, X is C 1 -C 12  alkyl, C 1 -C 12  alkoxy or C 2 -C 12 -acyloxy, Y is C 2 -C 12  alkyl, C 3 -C 12  alkoxy, or C 2 -C 12  acyloxy, Z is H, C 1 -C 12  alkyl or phenyl, U is C 3 -C 12  alkyl, benzyl or cyanoethyl or if R 1  and R 2  are both benzyl, U may be H, methyl or ethyl and W is H, methyl or ethyl and n is 1 or 2, benzene rings A and B may be substituted by amino optionally substituted by C 1 -C 6  alkyl and ring B may also be substituted by nitro or halogen. They are prepared by (a) reacting a benzophenone compound of the general formula with an indole compound of the general formula or (b) reacting a carboxybenzoyl indole of the general formula with an aniline compound of the general formula in which formulµ A, B, R 1 , R 2  and Z are as above, V is OH or X or Y and Q is U or W and when V is OH the product is alkylated or acylated. The compounds are used in pressure sensitive recording processes.
Patent GB-206962-A (GB)
Title: An improved grass edge trimmer or cutter
IPC: A01G3/06
Filed: 1922-09-06
Abstract: 206,962. Pugh, Ltd., C. H. and Bull, G. F. Sept. 6, 1922. Lawn-mowers.-A grass-edge cutter comprises a rotary cutter with blades 9 co-operating with a fixed blade 12 secured to a plate 11 attached to a handle 4. The cutter is supported on a grooved roller having tapered sides which is mounted on a shaft 2 carried by separated arms 3 secured to the handle 4. The rotary cutter is held up against a collar 7 integral with the roller by screws 8. The fixed blade 12, which is situated between the rotary cutter and the roller 1 and is provided with a strengthening flange 13, is adapted to be adjusted relatively to the rotary blades by bolts 14 secured at one end to the plate 11 and passing through a fixed plate 15. Nuts 16 situated on each side of the plate 15 may be adjusted along the bolts to position the fixed blade.