baber/WOPTO huggingface dataset:
Patent GB-986375-A (GB)
Title: Electrical apparatus for frequency changing
IPC: H03F7/04
Filed: 1961-12-05
Abstract: 986,375. Parametric amplifiers. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 5, 1961 [Dec. 14, 1960], No. 43498/61. Heading H3B. In a resonant circuit 20, Fig. 1, comprising inductances 21, 22 and capacitor 23, 24, the reactance of which can be varied to change the circuit resonance frequency from frequency f 1  to a frequency f 2 , energy at frequency f 1  is fed to the circuit 20 from an input circuit 25 when the circuit 20 is resonant at frequency f 1  and energy at frequency f 2  from the circuit 20 is induced into an output circuit 37 when the resonance frequency of circuit 20 is changed to f 2 . The capacitances may comprise back biased P-N diodes controlled jointly by a standing bias from a battery 50 and a signal, which may be periodic, from a source 52. The signal from source 52 may be stepped as shown by waveform 60, rectangular pulses, or sinusoidal, and in the case of the first two the positive durations may be manually controlled. The reactance of the circuit may be varied in the following ways: by the use of saturable reactors, which may employ ferrites or thin films, by physical core adjustments, by variable capacitors in parallel with capacitors 23, 24, by non- linear capacitors employing ferro-electric dielectric, by a cavity resonator or transmission line resonator filled or partially with a ferro electric or ferromagnetic substance whose permittivity or permeability can be changed by an externally applied electric or magnetic field, by a hollow resonant system in to which a plasma may be injected variably to change the natural frequency of the system, by the use of a semiconductor contained within the system which may have its impurities ionized, or by the use of a lumped-constant transmission line the electrical length of which may be varied by varying the reactive elements composing the line. The circuit elements of the resonant circuit may alternatively be distributed A cascade arrangement of two systems, in which the application of the two reactance controlling signals is controlled by a trigger device is described with reference to Fig. 2 (not shown). In this arrangement a delay device is included in the control circuit between the trigger device and the second signal source. A further modification described with reference to Fig. 3 (not shown) includes band-pass filters in the input and output circuits to define more closely the times of input and output, and in this arrangement an additional pair of diodes or a series capacitor may be included in the reactance control circuit to aid the biasing action. An arrangement for producing an output which is a harmonic of the reactance control signal frequency is also described, no input signal other than the initial frequency being internally generated.
Patent GB-1132639-A (GB)
Title: Ladder retaining apparatus
Inventor: STEVENSON EDWARD JOHN
IPC: B60R9/042
Filed: 1966-09-29
Abstract: 1,132,639. Mounting ladders on fire engines. MANCHESTER, LORD MAYOR, ALDERMAN & CITIZENS OF. 28 Sept., 1967 [29 Sept., 1966], No. 43567/66. Heading A5A. A fire engine 10 carries a ladder 16 by means of a longitudinal support 11 which is pivotally mounted near its front end at 17, and fixed at its rear end to a vertically movable horizontal bar 29, the bar being movable to a first position in which a clamp 34 grips the ladder and a second lower position in which the ladder is released for removal from the vehicle. The bar 29 slides up and down vertical poles 31, 32 under the action of ram 38 operated by hand lever 55.
Patent GB-1184957-A (GB)
Title: Hydroxyalkyl Esters
Inventor: WILLIAMS RONALD WILLIAM JAMES
IPC: C08G63/676
Filed: 1967-09-26
Abstract: 1,184,957. Hydroxyalkyl esters. PFIZER Ltd. 24 Sept., 1968 [26 Sept., 1967], No. 43710/67. Addition to 1,109,920. Heading C2C. [Also in Division C3] Hydroxyalkyl esters of itaconic acid homologues of formula where R is an ethylene group or an alkyl- or arylsubstituted ethylene group, X is a bivalent, saturated aliphatic hydrocarbon radical containing at least 2 carbon atoms and n is 1 or 2, specifically (2-hydroxypropyl)(2-[2-hydroxypropoxy]propyl) 2-methylene glutarate, are prepared by reacting ethylene oxide or an alkyl- or aryl-substituted ethylene oxide (e.g. propylene oxide, 1,2-butylene oxide or styrene oxide) in excess of 3 molar proportions with an acid in the presence of a catalytic amount of a lithium compound or a tertiary phosphine. Lithium chloride, bromide, iodide, sulphate, acetate, benzoate, hydroxide or hydride and tri-n-butyl phosphine and triphenyl phosphine may be used, preferably with an inhibitor e.g. p-methoxyphenol. The compounds may be polymerized or copolymerized (see Division C3).
Patent GB-1401057-A (GB)
Title: Glass channel-section members
IPC: E04C2/54
Filed: 1972-09-21
Abstract: 1401057 Glazing; partitions, assembling panels BOUSSOIS SOUCHON NEUVESEL 21 Sept 1972 [22 Sept 1971] 43796/72 Headings E1R and E1W [Also in Division C1] A glass channel-section member comprises a base 1 edged by two side-walls 2, at least 12 extending along the rim, the projection 3 or 12 comprising a rounded edge portion having a fine-polished surface. In the process of manufacture, the rounded edge portion is maintained out of contact with any part of the apparatus so as to maintain the fine-polish. The channel section members are interconnected by clips as 4a, 13a of metal, such as stainless steel strip, chromium nickel or aluminium and magnesium based alloy for outwardly faicing clips, or aluminium or rigid polyvinyl chloride for inwardly facing clips when assembled on a building. The channel section members may be separated by spacers (7) of neoprene of the clips as 4a, may have an inwardly projecting central portion 8 to space the members. As shown in Fig 9, members A1, A2, A3 each have one wall 2 with projections 3 and one straight wall 2a so that the central member A1 can be pivoted at 11, the clip 4a having one straight edge to fit over wall 2a but allow removal as shown. A number of dieffrent embodimemts are disclosed; with walls 2 at various angles to base 1; with the projection 3, which is at any angle to wall 2, but preferably 45‹, either inward or outward; with projection 12 inward or outward or both; in each case, the clip being similarly shaped.
Patent GB-906780-A (GB)
Title: Porcelain enamelling of ferrous metals
IPC: C23D3/00
Filed: 1960-12-21
Abstract: In a process for the porcelain enamelling of ferrous metal objects, the objects are (1) pickled for 3-15 minutes at 160-212 DEG  F. in an aqueous solution containing 5-20% by weight of citric acid or 1-20% by weight of glycollic acid, together with 0.0012-0.0030 moles/gallon of alkali metal thiosulphate or 0.0018-0.0042 moles/gallon of alkali metal sulphite, (2) coated with nickel, (3) coated with a porcelain enamel slip, (4) dried at 250-400 DEG F., and (5) baked at 1300-1500 DEG  F. for 2-6 minutes. The nickel coating is deposited from a nickel sulphate bath preferably maintained at a pH of 2.8-3.6 by the addition of acid. Following the nickel deposition, the object may be neutralized in a solution containing borax and soda-ash. Specification 886,361 is referred to.
Patent GB-1165678-A (GB)
Title: A Power Supply Circuit for an Electrical Discharge Machining Apparatus.
IPC: B23H1/02
Filed: 1967-09-27
Abstract: 1,165,678. Electro-erosion. CINCINNATI MILLING MACHINE CO. Sept. 27, 1967 [5 Dec., 1966], No. 44081/67. Heading B3V. [Also in Divisions G3, H2 and H3] A power supply circuit for spark erosion apparatus is provided with a protective circuit which operates to inhibit the supply of working pulses to the discharge gap for a predetermined period when a predetermined number of undesirable discharges occur in succession. Thus minor short-circuits or the like producing, say, no more than two bad discharges do not cause any interruption in the supply of working pulses; if, however, three such discharges occur, then the working pulses are inhibited for a predetermined period before being again applied to the discharge gap; if the irregularity has by then disappeared normal machining continues, but if it persists the supply is again inhibited and the system is protected against damage during the time it takes for the slower-acting normal overload protective circuits to operate. As shown, the gap between a workpiece 10 and a tool electrode 12 is supplied with working pulses derived from a multivibrator 26 by way of a clipper 28, a driver 30, and an output stage 16 which is associated with a conventional overload circuit 33 which operates to open the main supply contactor 36 on the occurrence of a persistent short-circuit. Movement of the electrode 12 is effected in known manner by a servo-system 18 to 23 responsive to gap conditions which are also sensed by a circuit 44, the output from circuit 44 being applied over a delay multivibrator 45 and a clamp cirucit 46 to control the main multivibrator 26 in the desired manner. Suitable transistor arrangements for the circuits 44, 45 and 46 are described with reference to Fig. 2 (not shown).
Patent GB-1320215-A (GB)
Title: Metal flocking
IPC: B32B15/14
Filed: 1970-09-16
Abstract: 1320215 Metal flocking BRUNSWICK CORP 16 Sept 1970 [29 Sept 1969] 44138/70 Heading B2E [Also in Division D1] A fabric comprises a base which includes metal, and flocked fibres having at least outer surfaces of metal bonded to a surface of the base and extending from the surface, the flocked fibres each being metal fusion bonded at or adjacent one of their ends to metal in the base portion. The fibres may be metal fusion bonded to each other, or may be maintained in spaced relationship, or may be provided in tufts. The base material may comprise metal fibres, e.g. random laid web material, woven, knit, wet or dry, carded or air laid; fabric material or alternatively a collimated hole structure defined by a body having a plurality of spaced through passages. The flocked fibres preferably have a rough, non- machined, un-burnished surface formed, e.g. by multiple end drawing of matrix material with removal of the matrix material either prior to or subsequent to the flocking operation. The flocking may be accomplished by electrostatic deposition or by magnetic flocking. Sacrificial material may be associated with the fibres, such material being removed subsequent to the flocking operation. The fibres may be blended with non-metal fibres and may comprise an electrically non-conductive core having a conductive coating. To facilitate fusion bonding the fibres may be precoated with adhesive material, e.g. collodion, camphor and ether, conventional adhesive cements, settable plastics. The adhesive material may be removed, e.g. by burning off. When the fibres are secured to the base by an adhesive, the adhesive may be made electrostatically conductive, e.g. by being provided with metal, graphite particles such as a metal loaded epoxy resin. The fibres may be stainless steel, nickel, aluminium.
Patent GB-1360149-A (GB)
Title: Alkali metal leak detector
IPC: G01M3/18
Filed: 1972-09-25
Abstract: 1360149 Insulating reactors UNITED STATES ATOMIC ENERGY COMMISSION 25 Sept 1972 [6 Oct 1971] 44156/72 Heading G6C [Also in Division Gl] An alkali metal leak detector comprises an insulating sheet 1 of refractory fibres sandwiched between and in contact with electrical conductors 2, 3 and means, such as a light bulb 5, to detect completion of an electric circuit between the conductors when shorted by liquid alkali metal. As shown, the conductor 2 is part of a pipe, valve or container in which a liquid alkali metal acting as a nuclear reactor coolant flows. The sheet 1 consists substantially of aluminium silicate fibres. Separate areas of a stainless steel mesh conductor 3, each connected individually to an indicator, can be provided on a larger area of insulating sheet.
Patent GB-1534505-A (GB)
Title: High-voltage circuit-breakers
IPC: H01H33/915
Filed: 1974-10-11
Abstract: 1534505 Fluid-blast circuit-breakers REYROLLE PARSONS Ltd 9 Jan 1976 [11 Oct 1974] 44232/74 Heading H1N A fluid-blast interrupter having an enclosure filled with insulating fluid, such as SF 6  or oil, has a pair of tubular contact members 10, 11 each containing an arc root electrode 12, 13 and the member 11 having an extension 12 which engages and makes sliding contact with the member 10 in the contact closed position. The separable contact ends are enclosed in an inner insulating housing 20 secured (at 11a) to the contact member 11 and means, such as a fixed piston 24 and cylinder 23 on the housing 20, drives fluid into the contact region as the contacts separate to form an arc between the tip 16 of member 10 and contact fingers 28 of the extension 26 so that the arc is driven to a position 30A between the electrodes 12, 13. The nozzle ends 16, 17 of members 10, 11 may be made of are-erosion-resistance material as also may the contact fingers 28 which may seal the inside of the members 10, 11 from the chamber formed by the housing 20. Gas which is forced through the members 10, 11 or circuit interrupter may be filtered and returned to the main tank (not shown). Separate inlet blast valve means may admit fluid to the housing 20 just before the contacts open.
Patent GB-1076570-A (GB)
Title: Injection-moulding machine
IPC: B29C45/70
Filed: 1964-10-30
Abstract: 1,076,570. Injection moulding machines. R. D. SCHAD. Oct. 30, 1964 [Nov. 1, 1963], No. 44271/64. Addition to 986,273. Heading B5A. In the injection moulding machine described in Specification 986,273, a valve member (47), Fig. 12 (not shown), in the injection nozzle (45) is opened when the pressure in the injection means exceeds a predetermined value. The valve member (47) is operated by a lever (201) pivoted at (200) and biased to closed position by a spring 206 acting through an extension (205) of a piston (203). Opening of the valve is effected by pressure conveyed to the piston (203) through a conduit (211) connected to spaces (140, 141), Fig. 9 (not shown). These spaces constitute a fluid cushion between the injection piston (38) and its constantly rotating crank drive (66a, 65).
Patent GB-1382287-A (GB)
Title: Fluid pressure braking systems for vehicles
IPC: B60T11/34
Filed: 1972-09-26
Abstract: 1382287 Load responsive braking systems AUTOMOTIVE PRODUCTS Ltd 14 Sept 1973 [26 Sept 1972] 44424/72 Addition to 1346585 Heading F2F  In an improvement in or modification of the pressure reducing valve of Specification 1,346,585, intended for use in a braking system having separate sources of fluid pressure for actuating brakes on first and second groups of vehicle wheels there is provided means responsive to fluid pressure from the source other than that connected to the valve inlet applying to the one plunger a load dependent on said pressure and acting in opposition to the resilient means. As shown pressure applied to the front brakes is applied to the valve unit 16 at 20 and acts against a plunger 57. If the front brake pressure is lost the thrust tending to close the valve by moving plunger 19 is reduced, allowing greater breaking pressure on the rear wheels.
Patent GB-1530588-A (GB)
Title: Electrical connectors
IPC: H01R31/00
Filed: 1976-01-15
Abstract: 1530588 Two-part couplings J I SADLER & A E ANDREWS 15 Jan 1976 [15 Oct 1974] 44683/74 Heading H2E An electrical connector comprises a body member 1 in which are located pins 2 of a plug and also socket contacts 3 of a socket, and a foot switch 4 connected to body member 1 and when operated serving to complete the electrical connection between the plug and the socket so that when the pins 2 of the body member are plugged into a supply outlet a device such as a drill can be plugged into the socket formed by contacts 3, and current supplied to it on operation of foot switch 4, from a location remote from the body member. The connector may additionally include a speed control circuit for an electric drill.
Patent GB-1385075-A (GB)
Title: Exposure time computation circuit for cameras
IPC: G03B7/083
Filed: 1972-09-28
Abstract: 1385075 Shutter control circuit ASAHI KOGAKU KOGYO KK 28 Sept 1972 [14 Oct 1971] 44909/72 Heading G2A A shutter control circuit having low source voltage and temperature dependance comprises a photodiode 1 producing a current dependant on incident light intensity and two similar circuit sections AC, BC each including a transistor 2, 6 and a voltage source 3, 7 one or both of the sources 3, 7 being adjusted according to exposure factors; the photodiode 1 being connected to the input of circuit AC the output of which is connected to the input of circuit BC, the output of circuit BC being a current i 2  dependant on exposure time determined in accordance with the APEX system. As shown, current i 2  charges an integrating capacitor 5. Voltage sources 3, 7 (detailed in Fig. 3 not shown) may include resistors (12) for setting in film speed and aperture. Preferably a buffer circuit 4 (detailed in Fig. 2; not shown) includes a memory capacitor (C 1 ). A shutter control circuit having low source voltage and temperature dependance comprises a photodiode 1 producing a current dependant on incident light intensity and two similar circuit sections AC, BC each including a transistor 2, 6 and a voltage source 3, 7 one or both of the sources 3, 7 being adjusted according to exposure factors; the photodiode 1 being connected to the input of circuit AC the output of which is connected to the input of circuit BC, the output of circuit BC being a current i 2  dependant on exposure time determined in accordance with the APEX system. As shown, current i 2  charges an integrating capacitor 5. Voltage sources 3, 7 (detailed in Fig. 3 not shown) may include resistors (12) for setting in film speed and aperture. Preferably a buffer circuit 4 (detailed in Fig. 2; not shown) includes a memory capacitor (C 1 ).
Patent GB-1402817-A (GB)
Title: Transducer for servomechanisms
IPC: B66B1/48
Filed: 1973-09-25
Abstract: 1402817 Measuring displacement electrically ELEVATORS PTY Ltd 25 Sept 1973 [21 Feb 1973] 44957/73 Heading G1N A transducer for a servo-mechanism providing for controlled stopping at a prearranged position of a body (e.g. lift at a floor) along a predetermined path is in two parts one part of which includes two plates of magnetic material P1, P2 mounted in spaced planes on the path (lift shaft) and the other part including electromagnetic units EU1, EU2 mounted on the body (lift). The plates are shaped as shown in Fig.3 or Fig.4 and are arranged so that they pass between the two halves of the respective units EU1, EU2 which comprise magnetic cores 6 and primary and secondary windings (not shown) connected in the circuit of Fig.5. If a lift approaches from below a floor at which it is required to stop both units EU1, EU2 are below plates P1, P2 and a maximum voltage is induced in the secondary windings and the output at terminals XY is zero due to the rectified voltages opposing each other in the comparison circuit. As the lift ascends the output of unit EU1 is suddenly reduced to a minimum by the intrusion of plate P1 between the windings and the output at XY swings to a maximum with terminal Y more positive than X. When the plates P1, P2 are as shown in Fig.3 as the lift ascends further the output from unit EU1 increases to a maximum whilst the output of unit EU2 remains at a maximum and the output at XY reduces. In the arrangement of Fig.4 the output of EU1 remains at a minimum whilst the output of EU2 falls to a minimum. In both cases the voltage at terminal Y becomes less positive. When the lift is exactly at floor level the output from EU1 and EU2 are both zero and output at XY is zero. If the lift exceeds the floor level the voltage at XY reverses with Y negative with respect to X and the amplitude increases as the distance from the floor. The transducers may have a common iron core, single primary, single secondary or the primaries may be located on the remote sides of the cores.
Patent GB-1240737-A (GB)
Title: Chromenopyrazoles and process for the preparation thereof
IPC: C07D491/20
Filed: 1969-09-15
Abstract: 1,240,737. Colour-reactive copying papers. FUJI PHOTO FILM CO. LTD. 15 Sept., 1969 [16 Nov., 1968], No. 45348/69. Heading D2B. [Also in Division C2] Spiro-lactones of the formula: in which R 1  and R 2  are each C 1-5  alkyl or benzyl, X is C 1-5  alkyl or optionally substituted aryl and Y is C 1-17  alkyl, optionally substituted aryl, amino, acylamino, carbomoylamino or C 1-5  alkoxy, are coloured yellowish orange to reddish orange on contact with an acid and are used in pressuresensitive copying papers.
Patent GB-1470340-A (GB)
Title: Photosensitive colour-forming element
IPC: G03F7/008
Filed: 1974-10-21
Abstract: 1470340 Azides HODOGAYA CHEMICAL CO Ltd and OJI PAPER CO Ltd 21 Oct 1974 [24 Oct 1973 8 July 1974] 45444/74 Heading C2C [Also in Division G2] 2-(phenyl or 4<SP>1</SP>-methoxyphenyl)amino-5-azidobenzoic acid or its methyl ester are prepared by diazotizing 2-(phenyl or 4<SP>1</SP>-methoxyphenyl)- amino-5-aminobenzoic acid or its methyl ester using sodium nitrate/HCl and then reacting the diazonium salt with sodium azide. 2 - (11 - naphthyl)amino - 5 - azidobenzoic acid and its methyl ester are similarly prepared by diazotizing 2 -(1<SP>1</SP> - naphthyl)amino - 5 - aminobenzoic acid or its methyl ester followed by reaction with sodium azide.
Patent GB-1159176-A (GB)
Title: A method of manufacturing Sodium Carbonate
IPC: C01D7/18
Filed: 1967-10-06
Abstract: 1,159,176. Sodium carbonate. KONINKLIJKE NEDERLANDSCHE ZOLINTINDUSTRIE N.V. 6 Oct., 1967 [17 Oct., 1966], No. 45808/67. Heading C1A. Sodium carbonate is made in an ammoniasoda process wherein the starting materials comprise sodium chloride and sodium hydroxide which has been partly or wholly carbonated with carbon dioxide gas, characterized in that part of the mother liquor of the sodium bicarbonate formed in a production tower is recycled as part of the feed mixture for said tower. The starting material is preferably diaphragm cell liquor, with or without added brine. For example, when 1 part of carbonated cell liquor containing 6 to 6À6 gm.-ions of Na<SP>+</SP> per litre is mixed with to 2 parts by weight of feed brine containing 5 to 5.4 gm.-ions Na<SP>+</SP> per litre, a mother liquor recirculation of less than 30% is necessary to avoid deposition of scale in the tower. Other examples are given.
Patent GB-1497532-A (GB)
Title: Articles of furniture
IPC: F16B7/18
Filed: 1973-10-02
Abstract: 1497532 Furniture frames and joints C J.M DAVIES 2 Jan 1975 [2 Oct 1973] 45964/73 Heading A4H [Also in Division F2] An article of furniture comprises a top 1 and a tubular metal framework composed of a number of support frames 2 and cross tubes 3b, 9 and 32 which are secured to the frames by headed bolts 7 or double-ended studs (8), Fig. 3 (not shown), each bolt or stud extending through a hole in one of the tubes of a frame 2 and threadedly engaging an insert 10 in the end of an associated cross tube or tubes. Studs (8) are used where cross tubes, i.e. tubes 9 and 32, extend on opposite sides of a frame 2. The inserts 10 are in the form of blocks or plugs secured within the ends of the cross tubes. A split plug (11), Fig. 4 (not shown) of plastics material may be used so that the plub is tightened within the cross tube when the bolt or stud is tightened.