baber/WOPTO huggingface dataset:
Patent GB-1286317-A (GB)
Title: Voltage-dependent trigger circuits
IPC: H03K17/60
Filed: 1969-11-17
Abstract: 1286317 Photographic exposure control PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 17 Nov 1969 [20 Nov 1968 56093/69 Heading G2A [Also in Division H3] A voltage dependent trigger circuit for controlling the exposure time of a photographic camera shutter comprises a first differential amplifier having transistors T1...T4 of a first conductivity type connected in cascade with a second differential amplifier having transistors T5, T6 of a second conductivity type, an output of the second amplifier being fed back to an input of the first amplifier. As shown, the feedback is via a transistor T7 and the output of the circuit is taken from the collector T6, but alternatively the output may be taken from T5 and the feedback obtained by connecting the collector of T6 to the base of T2, allowing T7 to be dispensed with. The resistors R3, R4 may be of unequal values, selected so that the circuit changes over from T2, T4, T6 conducting to T1, T3, T5 conducting when the relationship between the voltages applied to the bases of T1 and T2 reaches a prescribed value. As shown, T2 is connected to a reference potential provided by divider R5, R6 and T1 is connected to a capacitor C which is charged via a light-sensitive resistor R, and the circuit operates a camera shutter by means of amplifying transistors T8...T10 and electromagnet M. Initially, the capacitor is shorted by electromagnet contacts but closure of a switch S puts the circuit into a condition to energize M, thereby opening the shutter and removing the short. After a time depending upon the light falling on R the circuit changes over, M is released and the shutter closes. Diodes D1, D2 protect T10 from transient overvoltage and another diode D3 compensates for the emitter-base voltages of T5 and T6. Modifications. The resistor R may alternatively be sensitive to temperature; pressure or magnetic field or instead of the RC arrangement shown the voltage applied between T1 and T2 may be an unknown "measuring" voltage. The transistors may be field effect type, with or without an isolated gate, and the circuit within the dotted area may be formed as an integrated circuit.
Patent GB-1298249-A (GB)
Title: Process for developing silver halide light-sensitive materials
IPC: C07D277/82
Filed: 1970-11-27
Abstract: 1298249 Development of photographic silver halide materials FUJI PHOTO FILM CO Ltd 27 Nov 1970 [29 Nov 1969] 56441/70 Heading G2C [Also in Division C2C] Photographic silver halide materials are developed in the presence of a compound of the formula where R is alkyl, aralkyl or aryl, R 1  and R 2  are each hydrogen or alkyl or together represent a ring condensed in the thiazole ring, and wherein the alkyl, aralkyl and aryl groups may be substituted. The compound is preferably present in the developer but may be present in the silver halide material. The compounds give softer gradation especially for microfilms.
Patent GB-1197119-A (GB)
Title: Method of and apparatus for Heat-Exchange between Two Gases
Inventor: JAVORSKY BRONISLAV STEFAN
IPC: F28D13/00
Filed: 1968-12-02
Abstract: 1,197,119. Heat exchange between gases. ALFA-LAVAL A.B. 2 Dec., 1968 [13 Dec., 1967], No. 57080/68. Heading F4S. A heat conducting wall 4 separates two gas streams passing respectively in counterflow relation through chambers 2, 3, and heat transfer between the gases is aided by having in each chamber a plurality of beds of particulate solid material in contact with the wall 4 and fluidized by the gas. As shown, each chamber has a gas inlet and a gas outlet, and the beds of particulate material are contained in compartments formed in each chamber by gratings 5. To provide the counterflow, chamber 3 is further subdivided by partitions 9 forming subchambers 10 adjacent ones of which are interconnected by conduits 11. The wall 4 may be corrugated (Fig. 3) or it may have vertical flanges (14, Fig. 2) projecting therefrom into the chambers 2 and 3. To maintain fluidization the flow of gas through the beds may be supplemented by an auxiliary flow of gas or by a recirculation of the gas which has passed through the bed. The bed particles may comprise a hydrophobic plastics material when, for example, the apparatus is used to exchange heat between two air streams respectively entering and being exhausted from a dwelling.
Patent GB-1169879-A (GB)
Title: Porous Coatings
IPC: D06M15/693
Filed: 1966-12-21
Abstract: 1,169,879. Microporous coating. CARL FREUDENBERG K.G. 21 Dec., 1966 [31 Dec., 1965], No. 57147/66. Heading B2E. [Also in Division C3] A flexible microporous layer of vulcanised soft synthetic rubber having a transition temperature not below -25‹C, and having an elongation at break of at least 200% is made by applying to a porous support a viscous aqueous latex of a synthetic rubber which has carboxylic acid groups on the polymer chain containing a vulcanising agent in amount such as to give the above elongation, coagulating the latex on the support and vulcanising the coating. The porous support is generally a non-woven fleece or web. The rubber may be a copolymer of butadiene or chloroprene with acrylonitrile, styrene or methylmethacrylate and with 2-20% of a polymerisable carboxylic acid e.g. acrylic, methacrylic and itaconic acids. The amount of vulcanising agent does not exceed 2% in the case of sulphur or 5% in the case of ZnO. The latex may have a rubber concentration of from 20-60% by weight and a viscosity of between 2,000 and 20,000. Thickening agents such as protective colloids e.g. methyl cellulose alginates. P.V.A., soluble salts of polyacrylic acid, casein gelatins and tragacanth may be added to the latex. Accelerators and other additives such as fillers and pigments may be added. Less than 80% of air, based on the volume of fluid is stirred into the latex. The latex may be applied direct to the porous support, e.g. by a coating calender, such as swelling resistant paper or a silicone band or strip. Coagulation may be by dipping the coated porous support in a coagulating bath containing a solution in an organic solvent of suitable salts or acids, or by cooling or by heat sensitisation by including a suitable salt e.g. NH 4 Cl, NH 4 NO 3  or sodium silicofluoride. After coagulation vulcanisation may be effected with hot or steam. The surface may be buffed, or a grain pattern may be formed with a press or a graining calender. A suitable coating finish may be applied by spraying or with lacquering rollers. The finish may be of polyamide, polyurethane, or acrylic or methacrylic ester polymer.
Patent GB-1326810-A (GB)
Title: Voltage and current regulated power supply circuit for gaseous discharge lamp
IPC: H02M7/539
Filed: 1971-12-10
Abstract: 1326810 Transistor pulse oscillators WAGNER ELECTRIC CORP 14 Dec 1971 [30 Dec 1970] 57948/71 Heading H3T [Also in Division H2]  A generator providing high frequency rectangular pulses at an output terminal 446 comprises essentially a first transistor switching stage having its output connected to the input of a second transistor switching stage, the output of the second switching stage being connected to the input of the first switching stage by a series resonant circuit 422, 424. The output of the first stage is connected to the input of the first stage by a feed back loop including a resistor 419. to enable the circuit to oscillate and to improve the linearity thereof.
Patent GB-1381019-A (GB)
Title: Apparatus and method for the separation of blood
IPC: B01L3/00
Filed: 1972-12-28
Abstract: 1381019 Separator containers for centrifuges BECTON DICKINSON & CO 28 Dec 1972 [25 April 1972] 598-17/72 Heading B2P [Also in Division B8] An apparatus for separating blood into a light phase, i.e. the serum or plasma, and a heavy phase, i.e. the cells, when subjected to centrifugal force in a centrifuge comprises a container 12 for receiving the blood to be separated; a piston 50 slidably mounted in the container with its periphery making a fluidtight seal with the container; stop means 34 in the container for limiting movement of the piston so that it can slide from one end of the container to a position spaced from the opposite end of the container; and normally closed valve means 44 incorporated in the piston and arranged to open in response to a fluid pressure differential between the two sides of the piston whereby the light phase will during centrifugation pass from one side of the piston to the other side through the open valve means, as the piston slides in the container under the action of centrifugal force, and thereafter becomes separated from the heavy phase when the valve means close upon the pressure differential becoming nil as the piston comes to rest against the stop means 34. The container 12 may be madeof glass and is closed at its ends by closures 14, 16 made of a self-sealing elastomer, e.g. rubber. Blood is supplied to the interior of the container through a removable cannula or hollow needle 18. The stop means 34 consists of a constriction formed on the inner surface of the container by an annular groove 32. The piston 40 is formed of elastomeric material and is provided with an annular recess 54 in which a tubular metal, e.g. stainless steel, insert 52 is mounted with an interference fit. Formed integrally with the piston are axially spaced resilient sealing rings 50. The top wall portion of the piston which constitutes the valve means 44 is in the form of a diaphragm made of relatively thin, stretchable or resilient material provided with a plurality of normally closed apertures 42 in the form of self-sealing slits extending therethrough. A cylindrical axial recess 80 is provided in the piston for passage of the light phase towards the valve means 42. In a modification, Fig. 5 (not shown), a filter (60) is mounted in the recess 80 to prevent any fibrin from passing through the valve means 42. The filter may be of asbestos, glass wool, a plastic foam or paper.
Patent GB-1260210-A (GB)
Title: PROCESS FOR DRYING BIS-(beta-HYDROXYETHYL) TEREPHTHALATE
IPC: C07C69/82
Filed: 1969-12-24
Abstract: 1,260,210. Method of drying bis-(betahydroxyethyl) terephthalate. TEIJIN Ltd. 24 Dec., 1969 [27 Dec., 1968], No. 62893/69. Heading C2C. Bis(beta-hydroxyethyl) terephthalate which is wet with volatile liquid medium is recovered dry by heating and fusing the wet solid to a molten mass preferably at a temperature not above 180‹ C. and evaporating the volatile liquid medium from the melt. The boiling point of the volatile liquid medium at normal pressure is preferably not lower than 40‹ C. but is lower than that of ethylene glycol. The process may be conducted in a flow of inert gas. Many examples are given.
Patent GB-2002326-A (GB)
Title: Beer dispensing installation
IPC: B67D1/07
Filed: 1978-06-30
Abstract: The invention relates to an installation for drawing beer from a keg 7. The invention provides a cylinder 1 of gas, usually carbon dioxide, CO2, a line for supplying pressure gas to the keg and hereinafter called the gas line 2,4, a dip tube 8 in the keg and a line 15 for supplying beer from the keg to a beer engine and hereinafter called the beer line, characterised in that there is disposed between the dip tube and the beer line a device 10 mainly comprising a cylinder, a hollow shaft having a piston and movable relatively to the cylinder by the pressure of a fluid admissible into the cylinder alternately above and below the piston, the cylinder accordingly being formed above and below the piston with fluid entry ports; and the piston is formed with at least one annular recess so communicating via a radial duct with the hollow piston shaft that, because of the relative movements of the piston and cylinder and because of the presence of the annular recess in the piston, the beer line can be connected alternately either to the keg or, for washing, to a water line 14 which also extends into the cylinder. <IMAGE>
Patent GB-2001492-A (GB)
Title: Apparatus for receiving signals in plural frequency bands
IPC: H03K17/14
Filed: 1978-07-06
Abstract: To regulate the threshold voltage of insulated-gate field-effect transistors (IGFETs) in an integrated circuit, such as that of an electronic wristwatch, capacitors and other IGFETs of the same conductivity type as those of the controlled circuit are incorporated in the substrate thereof to form a regulating transistor, a constant-current generator and one or more voltage multipliers. The current generator and the main electrodes (source and drain) of the regulating transistor, whose gate is tied to its source, are connected in series across a generator of reference voltage constituted by one or more such multipliers. One of the main electrodes of the regulating transistor is connected, directly or through a further voltage multiplier, to the reference terminal (O) of the controlled circuit while still another such multiplier may be inserted between the ouptut of the constant-current generator and the interconnected source and gate electrodes of the regulating transistor. The current generator may comprise a storage capacitor periodically charged through a first IGFET (T1) in the presence of the leading edge of an applied pulse, such as a half-cycle of a square wave, and discharged through a second IGFET (T2) on the trailing edge thereof.
Patent GB-2008169-A (GB)
Title: An Elongate, Mine Roof Material-Containing Element Dispenser for a Mining Machine
IPC: E21C35/00
Filed: 1978-07-14
Abstract: A roll of wire mesh (32) is supported on the rear of a cut mineral loading cowl (25) of a rock or mineral winning machine (15). As the machine traverses along a path (4) cut by the machine the wire mesh (33) is paid out to retain or contain the roof material (1). <IMAGE>
Patent GB-2028769-A (GB)
Title: Quick assemblage packaging carton
IPC: B65D5/24
Filed: 1978-08-31
Abstract: A carton for quick assemblage, starting from a flattened condition thereof, comprises a rectangular sheet of cardboard (1), pairs of parallel fold lines (a) impressed in the sheet and defining a rectangular bottom panel (3), and pairs of opposite flaps (4, 5) foldable perpendicular to the bottom panel, whereby the sides of the carton are formed. The flaps (4) extend, with the carton in the flattened condition, in the same plante as the bottom panel with the flaps (5) folded onto the bottom panel. The ends of the flaps (5) are provided with tabs (6) having adhesive areas (8) adapted to adhere to one another with the carton in the assembled condition. <IMAGE>
Patent GB-2030615-A (GB)
Title: Equipment for Laying a Layer of Elongate Material Adjacent to a Newly Exposed Mine Roof
IPC: E21D19/02
Filed: 1978-11-07
Abstract: The equipment comprises storage means (10) for a roll of material (11), e.g. wire mesh, and resilient guide means (12) for guiding the material (72) as it unwinds towards the newly exposed mine roof (5). <IMAGE>
Patent GB-2010382-A (GB)
Title: Sliding Door
IPC: E05F1/02
Filed: 1978-11-08
Abstract: A sliding door (13) biassed in a closing direction by a closing weight (24) and retainable in any opened position by retaining means which reduce the effective weight of the closing weight (24) to an extent sufficient to prevent closing of the door by the closing weight (24) but the door being closable manually or by automatic means such as a fire detector. Preferably the retaining means comprise a compensating weight (27) coupled to the closing weight by a cable 25 via an electromagnetic (28) which can be de-energised to allow the full weight of the closing weight (24) to act on the door to close the door. <IMAGE>
Patent GB-2034357-A (GB)
Title: Washing machine and agitator therefor
IPC: D06F17/00
Filed: 1978-11-23
Abstract: An agitator assembly for mounting in the wall of a washing machine tub comprises a flexible bar 1 with an integral spherical base 2 made of rubber or plastics. The base 2 is mounted between a packing ring 3 and a socket element 4 so that the bar 1 extends through an aperture in the tub wall 5 into the tub. Bolts 10 with compressed springs 12 bias the socket element 4 and base 2 against the tub wall and a water-tight seal is effected by a washer 6. The bar 1 is deflected by the washing and water moved around by a rotating drive disc and the base 2 is able to rotate within the socket element lubricated via channels 9. A protecting cap 7 limits the angular displacement of the bar 1 preventing small items being tangled or trapped and its specially shaped aperture reinforces the water-tight seal. The effect of the bars is to disrupt the flow inside the tub whereby to increase the agitation undergone by the washing. <IMAGE>
Patent GB-2040281-A (GB)
Title: Preparation of xanthothricin
IPC: C12P17/18
Filed: 1979-01-16
Abstract: The antibiotic xanthothricin may be prepared by cultivating axanthothricin- producing strain of the microorganism Streptomyces bruneus, particularly Streptomyces brunneus subspecies xanthrothricini, which is available under the accession No. RIA 1568 from the All-Union Research Institute of Antibiotics of the Union of Soviet Socialist Republics.
Patent GB-2015292-A (GB)
Title: A method for determining the attitude of a spinning spacecraft
IPC: G01S1/40
Filed: 1979-02-27
Abstract: This invention provides a means of determining, from signals received on the earth's surface, the orientation of a spinning spacecraft about its rotational axis. It utilises the Commutated Array technique whereby a symmetrical triad of linear arrays of microwave radiators mounted on the spacecraft provides three pseudo Doppler signals whose sum is proportional to the cosine of the angle  phi made by the observer's line-of-sight to the spacecraft and the axis of symmetry of the triad. This technique provides, through time-dependent sampling, means of obtaining angular accuracies of better than 0.01 DEG  with radiating apertures of much smaller size than would be required by conventional beam-forming techniques. Where the spacecraft is not rotating, or its orientation is known through other means, measurement of any two of the three array signals yields information on the observer's position relative to the spacecraft. <IMAGE>
Patent GB-2018868-A (GB)
Title: Railway rails
IPC: E01B5/02
Filed: 1979-04-06
Abstract: A flange-based rail 1 (e.g. for mine railways) has an asymmetric head 2 providing both (a) a conventional head portion 10 for flanged wheels and (b) a wide running face 24 for rubber-tyred wheels, the asymmetric head forming on one side a deep channel 14 for receiving a derailment-preventing member, or a brake, of a vehicle. On the other side a conventional channel 22 can receive a fishplate in a tightly fitting manner. <IMAGE>
Patent GB-2019778-A (GB)
Title: A Mica Insulating Foil and Method for its Manufacture
IPC: H01B3/04
Filed: 1979-04-25
Abstract: An impregnated mica insulating foil for insulating electrical machines comprises a mica paper (17) secured to an open weave fabric (11) e.g. of glass fibres by means of an epoxy resin adhesive and impregnated with an impregnating resin e.g. a hardener-free epoxy resin, the epoxy resin adhesive coating the fabric completely except in the regions between warp and weft threads which remain open to leave at least 50% of the surface of the mica paper adjacent the fabric unmoistened by the adhesive and the epoxy resin being non-adhesive at room temperature and soluble in the impregnating resin. The invention also includes a method of producing the insulating foil wherein the fabric 1 is passed through a bath 2 of the adhesive solution, air blasted at 3 to free the interstices of adhesive, dried at 4 and calendered by rollers 5, 6 to the mica paper strip 7 impregnated with resin by roller 8. <IMAGE>
Patent GB-2048162-A (GB)
Title: Composite strip material
IPC: C09J7/35
Filed: 1979-05-17
Abstract: Composite strip material, especially for use in the formation of waistbands, for skirts and trousers, hems, pleats and fabric belts, comprising a non-woven fabric 2 carrying a heat-activatable adhesive on one surface and one or more continuous lines of perforations 4a, 4b extending in and substantially parallel to its length direction, whereby the strip will fold preferentially about the one or more continuous lines, is characterized in that at least one strip of reinforcing material 6 is attached to the non-woven fabric, e.g. by stitches 8, the or each strip lying adjacent the one continuous line of perforations or between two adjacent such lines. A waistband for trousers 10 comprises a lining 12, with a facing fabric 16 and gauze interlining 18, and an outer facing fabric 14 heat-pressed onto the fabric 2. Lines of stitching 20, 22, 24 are provided. <IMAGE>
Patent GB-2051174-A (GB)
Title: Roofing tile with adjustable overlap
IPC: E04D1/04
Filed: 1979-05-23
Abstract: A roofing tile or "artificial slate" (1) has a first side lock portion (2) including upwardly facing channels and a second side lock portion (19) including a downwardly facing channel (20). The tile also has a head lock (3) and a downwardly extending lower end wall (22). A series of interconnected holes (11) is provided in the first side lock and a single hole (18) is provided in the head lock. When the tiles are arranged on a roof in mutually overlapping relationship, the side lock (2, 19) of sideways adjacent tiles interengage and the lower end walls (22) overlie the head lock (3) of downwardly adjacent tiles. Nails passing through one of the interconnected holes (11) and the holes (18) of downwardly adjacent tiles secure the tiles to a roof structure and the series of holes (11) permits adjustment of the amount of overlap between downwardly adjacent tiles. <IMAGE>
Patent GB-2053037-A (GB)
Title: Manipulating portable tools
IPC: B05B13/00
Filed: 1979-07-09
Abstract: A device for manipulating and operating portable tools including an overhead gantry beam (1), which moves on fixed rails (3 and 4) perpendicular to the axis of the beam, a trolley (5) mounted on and movable along the gantry beam (1), a boom (6) mounted on and extending downwardly from the trolley (5) a means for mounting a tool or tools at the end of the boom and numerical control system capable of controlling the position of the boom (6) from pre-determined numerical data. The device enables a very large workspace to be covered with minimal intrusion into the workspace by the device. In addition the tool or tools can be precisely controlled in any one or more of three orthogonal directions and enables otherwise difficult manual operations to be carried out on large items with ease. <IMAGE>
Patent GB-2032376-A (GB)
Title: Transport apparatus
IPC: A01D90/04
Filed: 1979-07-27
Abstract: Transport apparatus, for example, for loading wagons, comprises cutters (9), transport elements (2) projecting into a transport channel (3) and cooperating with the cutters, the cutters being adjustable in position when a predetermined cutting force is exceeded, and a control mechanism operable by the cutters. The control mechanism is connected to a drive (20) for the transport elements and if a force greater than the predetermined cutting force is applied to the cutters the drive to the transport elements is either terminated or reversed. <IMAGE>
Patent GB-2061014-A (GB)
Title: An electromagnetically actuated injector for internal combustion engines
IPC: F02M63/00
Filed: 1979-10-17
Abstract: An electromagnetically actuated fuel injector comprises an electrically wound core 4 and a coaxial moving iron 5. A needle valve 6 is secured to the iron 5 to close an aperture in bush 7. The front surface 41 of core 4 or the end face of the iron 5 carries a diamagnetic insulating thickening which serves to centre the moving assembly, to limit opening travel and to prevent sticking. The iron 5 has a polygonal cross section defining channels through which fluid can flow to provide an anti-pumping effect. <IMAGE>