baber/WOPTO huggingface dataset:
Patent GB-1457748-A (GB)
Title: Method of operation of a varistor
IPC: H01C7/10
Filed: 1973-12-27
Abstract: 1457748 Biasing radiation detectors GENERAL ELECTRIC CO 27 Dec 1973 [29 Dec 1972] 59806/73 Heading G1A [Also in Division H1] In a method of operating a photo-conductive varistor of the kind described in Specification 1457749, (see Division H1) comprising a sintered polycrystalline body of zinc oxide with a minor constituent consisting of at least one other metal oxide and/or halide, a pair of electrodes being disposed on a surface of the body and being separated by a gap, a potential difference applied between the electrodes is selected to determine the sensitivity and magnitude of current flowing between the electrodes when the gap is illuminated, so that the said current, which actuates a recording or control device, is a function of both the potential difference and the intensity of the illumination. To eliminate dark current in a device comprising main electrodes 11a, 12a Fig. 2, separated by a gap 15, a pair of reference electrodes 11b, 12b, shielded from incident radiation, are connected in a bridge circuit in opposition to the main electrodes. Alternatively, the reference electrodes may be disposed on the surface of the varistor opposite to that receiving the radiation. In a variant, Fig. 3 (not shown) one electrode (12c) is circular and is disposed concentrically within another annular electrode (11c), the gap 15 between them also being annular.
Patent GB-1392500-A (GB)
Title: Condensate valve
IPC: F16T1/14
Filed: 1972-12-28
Abstract: 1392500 Valves REEF-BAKER CORP 28 Dec 1972 [15 June 1972] 59923/72 Addition to 1266996 Heading F2V [Also in Division F4] The condensate valve of Specification 1,266,996 is modified in that the valve member has two seals 58, 59 separated by a square sectioned tube 52 about a stem 53 which is secured to the diaphragm 64 by cupped washers 65, 66 and nut 67. The corners of the tube 52 engage the wall of the passage 46 to guide the reciprocation of the valve member. A manually-operated chain device 77 has a screw 78, the end of which can be positioned to hold the seal 59 seated or both seals 58, 59 away from their seats. Heating element 85 is provided.
Patent GB-1419640-A (GB)
Title: Dental adhesive composites
IPC: A61K6/884
Filed: 1972-12-29
Abstract: 1419640 Dental compositions LEE PHARMACEUTICALS 29 Dec 1972 [3 Jan 1972] 60022/72 Heading C3P An adhesive dental restorative composite comprises (1) a suspension of filler fibres each having a length of 1 to 100 microns and a diameter <SP>1</SP>/ 20  to <SP>1</SP>/ 5  of its length, in a liquid polyacrylate resin (defined) having a viscosity of less than 5000 centipoise, (2) a peroxide catalyst and (3) an accelerator (e.g. a tertiary amine) for the resin. The fibres may have been treated with an organosilane keying agent. The resin may be a mixture of a compound of the formula where R 1  is H or C 1 -C 4  alkyl and R is where x is 1 to 5, CH 2 (CH 2 ) y CH 2 O where y is 1 or 2, CH 2 CHOHCH 2 O(CH 2 ) 4 , OCH 2 CHOHCH 2 O or CH 2 CHR 3 CH 2 O where R 3  is OH or OCOCR 1  = CH 2  and an aromatic or alicyclic di- or polyacrylate. In the examples calcium silicate fibres are treated with hydrolysed gamma-methacryloxypropyltrimethoxy silane and mixed with a blend of bisphenol A bis-(3-methacrylate- 2-hydroxypropyl)ether and triethylene glycol dimethacrylate, N - bis - (2 - hydroxyethyl)- p - toluidine benzoyl peroxide, 3 - tertiarybutyl - 4 - methylphenol and in some cases TiO 2  and butylated hydroxy toluene. In use the compositions are applied to a tooth and permitted to harden in situ.
Patent GB-1255028-A (GB)
Title: Polyimide-forming compositions
IPC: C08K5/55
Filed: 1968-12-24
Abstract: 1,255,028. Laminates. MONSANTO CO. 24 Dec., 1968 [2 Jan., 1968], No. 61302/68. Heading B5N. [Also in Divisions B2 and C3] A polyimide-forming composition comprises a mixture of (A) an aromatic tri- or tetracarboxylic acid or an ester or ammonium salt thereof; (B) an aromatic at least a diprimary amine; and (C) at least 0-1% by wt. of (A)+(B) of a thermal stabilizer which is an alkyl acid ester or an ammonium or substituted ammonium salt of phosphoric acid or of an oxyacid of boron or sulphur. Extensive lists of possible ingredients (A), (B) and (C) are given; the proportions of (A) : (B) may vary from 70% molar excess of (B) to 10% excess of (A). The compositions may also comprise solvents, catalysts, fillers, extenders, adhesion promoters and blowing or foaming agents. They may be used in the manufacture of fibre-reinforced composites e.g. using glass or asbestos fibre or cloth. Glass cloth used in Examples is surface-treated with 3-aminopropyl triethoxysilane. 12-ply laminates are made from the impregnated and B-staged cloth. The composition may also be used with particulate fillers e.g. aluminium microballoons or TiO 2 .
Patent GB-632313-A (GB)
IPC: F16F15/16
Abstract: 632,313. Torsional vibration-dampers. DE HAVILLAND AIRCRAFT CO., Ltd., and HADWIN, R. N. Jan. 31, 1947, No. 3091. Class 108 (iii)] [Also in Group XXXIII] A vibration damper or absorber for attachment to a rotating shaft, comprises a casing containing a mass consisting of a pre-determined quantity of a mobile non-viscous or low-viscous liquid such as mercury, and so dimensioned internally as to permit the volume of liquid to change its shape under the vibrationproducing force, with consequent movement of its centre of mass in a pendulous manner at a frequency bearing a constant ratio to the rotational speed of the shaft. The liquid may be mercury or alternatively some other mobile non-viscous liquid such as acetylene tetrabromide or Clerici, or a combination of mercury and one of the latter liquids. For use at high temperatures a fusible metal such as Wood's metal may be employed in a stainless steel casing. As shown in Fig. 5, applied to the damping of an airscrew shaft, the casing 3 is tapered externally to fit a recess 8 in the blade root. The casing is sealed by a closure plate 4 which may be removable or (as shown) may be welded, or otherwise secured in position, and fitted with a closable inlet passage axially arranged in a stem portion 5 for the introduction of the mercury 1. Balancing washers 7 may be mounted on the stem 5 and retained by a nut 6. In a similar construction (Fig. 1, not shown) the plate 4 is externally screw-threaded for engagement with the casing, the internal shape of which is part-spherical. In another construction (Fig. 4, not shown), the internal shape is of part-conical formation while in a further construction (Fig. 3, not shown), the casing is of cylindrical shape and is screw-threaded externally, the cavity being of annular formation. A number of the dampers may'be embodied in the airscrew, shaft, &c. each being tuned to deal with vibrations of a respective order. Specifications 7035/40 (as open to inspection under Sect. 91), 600,498 and 604,528 are referred to.
Patent GB-2000945-A (GB)
Title: Improvements relating to signal compressors and expanders
IPC: H03G7/00
Filed: 1978-07-11
Abstract: In syllabic compressors and expanders a control signal is required to control the gain of the device which effects compression or expansion. In this invention a first control signal following long term amplitude variations of the input signal is derived by means of an RMS detector 11. A second control signal following short term amplitude variations is derived by an adaptive smoothing circuit 13 of known form. The two control signals act in combination. They may be added together to provide a single control signal for a variable gain amplifier 23 or they may be applied to control respective, series-connected, variable gain amplifiers. The invention enables the advantage of an adaptive technique to be obtained without the need to set levels to get the correct results in a compressor - expander processing system. <IMAGE>
Patent GB-2001923-A (GB)
Title: Guide systems
IPC: G03B1/42
Filed: 1978-07-19
Abstract: A guide system for the photographic or photochromic film 20 in an optical data recorder consists of a gap through which the film is passed, air cushions being provided between the film and the sides of the gap so that the film is maintained substantially at the centre of the gap. The system eliminates scratching of the film and prevents film flutter or twist. <IMAGE>
Patent GB-2004744-A (GB)
Title: Immunological preparations containing major histocompatibility complex antigen
IPC: A61K39/385
Filed: 1978-09-26
Abstract: An immunologically active preparation for human or veterinary use comprises an antigenic material in combination with an MHC (Major Histocompatibility Complex) antigen, especially Human Lymphocyte Antigen (HLA). The MHC may be papain- solubilized, and the antigenic material may be a bacterial, viral, protozoal or fungal antigen, a toxoid or toxin, a peptide hormone or a hapten. The combination is brought about with a conventional coupling agent.
Patent GB-2005611-A (GB)
Title: Control valves for power steering
IPC: B62D5/087
Filed: 1978-10-02
Abstract: In a control valve for power- assisted steering systems with an unbalanced working cylinder, a differential pressure in the two working cylinders (11, 11') of the unbalanced working cylinder is obtained by two throttles (16a, 16b). One throttle (16a) is arranged between a branch point (13) of a pipe (10) from a flow control edge (9) to the smaller surface working chamber (11) and a return pipe (15). The other throttle (16b) which may be of equal or unequal size to the throttle (16a), is arranged downstream of a flow pipe (8) of the working medium and upstream of a branch point (13') of a pipe (10') leading to the larger surface working chamber 11' or to a control edge (14'). The throttles may be constrictions in the pipes (10, 10'), or attached directly to the pistons (4), or machined into a bore surface of the valve housing. The throttles may be annular, bevel-shaped or of planar construction. <IMAGE>
Patent GB-2009672-A (GB)
Title: Laminated articles
IPC: B32B38/00
Filed: 1978-11-23
Abstract: In a method of bonding laminations of a magnetic core, photoresist material consisting of a copolymer is applied as a film to a sheet of magnetic material to define lamination shapes to enable the laminations to be formed by etching. The film of photo-resist material on the laminations is then utilised to bond the laminations together in a stack. In order to permit the core to operate at temperatures higher than the softening temperature of the photo-resist material, the bonded stack is irradiated to cause changes to the bonding material such that the material does not soften at the operating temperature of the core.
Patent GB-2038086-A (GB)
Title: Amorphous semiconductor devices
IPC: H01L21/205
Filed: 1978-12-19
Abstract: Semiconductor devices, and in particular solar cells or other photosensitive devices, are fabricated from amorphous material which comprises at least one elemental semiconductor and at least one halogen. Specific examples are elemental germanium or a germanium/silicon compound. One method of deposition is plasma aided chemical vapour deposition from a mixture of gases, e.g. germane or germane and silicon with a halogen bearing gas.
Patent GB-2039859-A (GB)
Title: Recovery of Tin from Stanniferous Material
IPC: C22B25/06
Filed: 1979-01-16
Abstract: Tin is recovered from stanniferous material by either blowing an air-fuel mixture with the air excess number of 0.95 to 1 through a molten bath of the stanniferous material in a fuming furnace in the presence of fayalite slag, the slag to stanniferous material ratio being 4-20:1, and in the presence of a sulphidizing agent or blowing the air-fuel mixture through a molten bath of the stanniferous material in a fuming furnace in the presence of a reducing agent until substantially complete reduction of the oxides contained in the melt and subsequently in the presence of a sulphidizing agent introduced into the reduced melt.
Patent GB-2018073-A (GB)
Title: Improvements in or relating to pulsed power supplies
IPC: H03K3/53
Filed: 1979-03-14
Abstract: A pulsed power supply for driving an X-ray tube is described. Four p.f.n. devices are coupled in pairs to respective transformers and the individual devices supply pulses of relatively short duration to their respective transformers. Each pulse supplied by one device is followed by a pulse supplied by a device of the other pair, the devices in a pair supplying pulses alternately, and pulses supplied by all of the devices in sequence are combined to produce a pulse of relatively long duration for application to the tube. <IMAGE>
Patent GB-2019162-A (GB)
Title: Viewdata modem
IPC: H04M11/08
Filed: 1979-03-29
Abstract: A Viewdata modem which is remotely powered from the telephone exchange and is remotely tested therefrom, and a telephone set are connected to the same line to the exchange, through a bistable switch. Switching between the "telephone mode" and the "Viewdata mode" uses a bistable relay (K) which is switchable between its two states by the discharge of capacitors (Ca and Cb). In the normal state one capacitor (Ca) is charged from the line: to set the station to "Viewdata mode", this capacitor is discharged via the relay (K), whose contact (k) switches the line from the telephone set to the TV receiver, via signal converting means SU. The other capacitor (Cb) is now charged from line, and when the terminal is to be reset to "telephone mode" this other capacitor discharges via the relay (K) to switch the line back to the "telephone mode." This switching between "telephone mode" and "Viewdata mode" can be done locally by the subscriber UM, or remotely from the telephone exchange, W1, 2 e.g. for test purposes. <IMAGE>
Patent GB-2018906-A (GB)
Title: Pumping liquid by direct gas pressure
IPC: G01F11/28
Filed: 1979-04-06
Abstract: A method and apparatus for delivering metered quantities of a liquid wherein the liquid is circulated through a chamber 1 to fill the chamber with liquid, circulation is temporarily terminated with the chamber filled with liquid and while circulation is terminated gas under pressure is admitted to the chamber 1 to displace liquid therefrom through a discharged port 7, the quantity of liquid displaced being controlled by regulating the volume of the chamber and/or by regulating the relative disposition in the chamber of the point of entry of the gas and point of discharge of the liquid. As described the apparatus is for injecting fuel into an i.e. engine, gas pressure being supplied by a separate pump or from the engine cylinder and in addition to discharging the liquid, is utilised to operate the liquid circulating valves 102, 103, the liquid discharge valve 107 and the gas inlet valve 106. <IMAGE>
Patent GB-2052055-A (GB)
Title: Gas Sampling Apparatus
IPC: G01N1/24
Filed: 1979-07-02
Abstract: Gas sampling apparatus for sampling blast furnace gas or coke oven gas comprises a double-acting pump (14) for drawing on a source of said gas and discharging the gas to an accumulator for subsequent determination of any one of a multiplicity of components of that gas. The pump has a pair of variable gas containers (20, 21) and valves (23 to 25) sequentially controlled in conjunction with the pump such that a gas source continuously feeds the accumulator whereby to obtain a more truly representative sample for analysis at any time. <IMAGE>
Patent GB-2022505-A (GB)
Title: Regenerated cellulose fibres
IPC: D01F2/08
Filed: 1979-07-11
Abstract: Highly absorbent regenerated cellulose fibres having water imbibitions which are usually in the range 150 to 300 per cent may be made by spinning cellulose fibres with a lumen and incorporating a dispersed polymer and/or substituent groups on the cellulose to increase the absorbency. The lumen may be produced by incorporating a blowing agent such as sodium carbonate in the viscose and may be either in expanded form to give a tubular structure or at least partially collapsed to give a multi-limbed structure. The polymer additive may for example be sodium polyacrylate, poly(vinyl pyrrolidone) or sodium carboxymethyl cellulose, and is suitably used in a concentration less than 5 per cent by weight. The fibres are useful in making swabs, dressings and catamenial tampons.
Patent GB-2026807-A (GB)
Title: Electrical filters
IPC: H01L27/10
Filed: 1979-07-26
Abstract: A filter circuit utilizing charge transfer delay lines having individual CTD elements utilizing four-terminal resonators each of which is designated as a self-contained closed looped circuit and which determine the frequency dependent transmission characteristics of the filter circuit and wherein successive four-terminal resonators are interconnected by way of a coupling circuit. The invention utilizes the coupling circuit mounted between adjacent four-terminal resonators which are constructed simply as possible and utilizing integrated circuit techniques. Amplifiers are connected in parallel with the input and/or the output of the individual four-terminal resonators and the signal flow direction of the amplifiers corresponds to that of parallel connected CTD lines and the series lines of the coupling circuit and the amplifiers have unidirectional transmission characteristics and an inverting amplifier is contained in at least one of the series lines.
Patent GB-2033172-A (GB)
Title: Strip light fitting
IPC: H01R33/02
Filed: 1979-09-14
Abstract: A fitting for a double ended tubular lamp 10 has a removable cap 14 at least at one end, the or each cap having a plug 20 which engages in a socket in the fitting and when so engaged, closes a double pole switch arrangement to make an electrical connection for a contact 12 of the fitting, which contact 12 engages a contact on the end of the lamp 10 when the lamp 10 is engaged in the fitting. The cap 14 may be provided with a contact 24 which bridges two fixed contacts 26 to complete the electrical circuit when the cap 14 is engaged with the fitting. <IMAGE>
Patent GB-2060025-A (GB)
Title: Portable fencing
IPC: E01F9/70
Filed: 1979-10-05
Abstract: A fence 54 consisting of swingably interconnected units each comprising two panels 4, 6 hinged together by hinge 12 with an angular stop 20 is mounted on a trailer 50. When the trailer 50 is drawn forward (arrow B) by a vehicle 52 the fence is pulled out and takes up a self- supporting zig-zag formation. To collect the fence into the trailer the vehicle is attached along side the trailer by means of an arch member 110' swung down over the wheel 67 and by a support strut 74 attached to the rear of the vehicle and is driven in the opposite direction so that the fence section, assisted by rollers 86 and 68 driven by pulley 100 engaging wheel 86, fall back onto the trailer, being retained by a spring-loaded arm. <IMAGE>
Patent GB-2033184-A (GB)
Title: A DC voltage converter
IPC: H02M3/338
Filed: 1979-10-25
Abstract: A self-oscillating D.C. voltage converter is proposed for supplying loads which can exhibit a short circuit and/or require a constant supply current. The circuit arrangement includes a transformer (N) with a primary winding (N1), a secondary winding (N3) for supplying a load and a secondary winding (N2) as a control winding. The primary winding is connected to a D.C. voltage source through a switching transistor (Q1) and a current measuring element (R3). An additional control transistor (Q2) is switched by the voltage drop at the current measuring element (R3) the control transistor acting on the switching operations of the switching transistor (Q1) in the same sense as the control winding (N2), limiting the peak current (I1) to a predetermined value, introducing the feedback operation and reducing the losses in the switching transistor (Q1) due to the enlargement of the flank slope on variation of the switched primary current (I1). <IMAGE>
Patent GB-2035559-A (GB)
Title: Moving object detecting device
IPC: G01S13/62
Filed: 1979-11-07
Abstract: C. W. Doppler radar, by classification 21, 22, 24, 26, 27 of the phase of the Doppler beat signal into one of at least three sectors in vector space and analysis of the long term variation of such classification, enables the detection of complex Doppler signals arising from objects having parts moving at different speeds but generally in the same direction. Analysis is by integration 8 of signals Z representing by sign the sense of change of the sector classification and threshold detection, 9, 28 of the integrator output. <IMAGE>
Patent GB-2038771-A (GB)
Title: A method and an apparatus for applying objects to a surface
IPC: C12M/
Filed: 1979-11-12
Abstract: The invention relates to a method and apparatus for applying objects such as antibiotic discs to a surface (2), e.g. the surface of a culture medium, by impaling them on an axially movable needle (3), which then moves the object over an intermediate (5) surface, and through a hole (6) therein located in the feeding direction, to apply the object to the surface (2). An annular member (4), concentric with the needle, then presses the object against the surface and the needle withdrawn, followed by the member (4) to restart the cycle. <IMAGE>
Patent GB-2037556-A (GB)
Title: Chaff cutter and feeding mechanism thereof
IPC: A01F29/10
Filed: 1979-11-20
Abstract: In a chaff cutter having two pairs of co-operating pressure rollers 8, 5 and 15, 4 arranged before the cutting mechanism, the top rollers 8, 15 of each pair are interconnected by a lever system 10, (13), 23, 19 whereby when the top upstream roller 15 yields with increased material feed, the top downstream roller 8 is entrained upwardly only after a given initial upward movement of roller 15 so that the intake gap is always narrowing towards the cutting mechanism. <IMAGE>