baber/WOPTO huggingface dataset:
Patent GB-2064898-A (GB)
Title: A drive arrangement for a stepping motor
IPC: G04C3/14
Filed: 1980-12-02
Abstract: The drive arrangement comprises circuitry for detecting the passage of the motor current through a relative maximum while a drive pulse is applied to the motor. The duration of the drive pulse, which ordinarily has a predetermined minimum duration T0, is increased by a predetermined amount  DELTA T if no maximum is observed during the time T0. If no current maximum is detected during the detection pulse, the detection pulse is prolonged by one or more increments of predetermined lengths, up to a predetermined maximum duration. The drive pulse is also prolonged each time the detection pulse is prolonged. In one preferred embodiment, a memory circuit (13), which is reset after each drive pulse, which is reset after each drive pulse, stores the maximum value of the motor current observed during a given pulse as of a given instant. A comparator (12) compares the stored value to the instantaneous value of the current, the comparator output changing state when the current falls after passing through a relative maximum. <IMAGE>
Patent GB-2066936-A (GB)
Title: Hydrocarbon recovery
IPC: F25J3/02
Filed: 1980-12-03
Abstract: A process for obtaining at least one liquefied C4 hydrocarbon from a gaseous stream comprising at least one gaseous C4 hydrocarbon comprises compressing in at least one compression stage (22, 27) said stream so as to give compressed gas having a pressure in the range about 5.5 to about 8.5 kg/cm<2>, and cooling in at least one cooling stage (23, 29) at least a portion of said gas so as to give at a temperature in the range about 2.0 to about 15.0 DEG C at least one liquid phase and at least one gaseous phase, at least one said liquid phase comprising at least one liquefied C4 hydrocarbon, at least one said gaseous phase optionally containing at least one gaseous C4 hydrocarbon. <IMAGE>
Patent GB-2093671-A (GB)
Title: Bite detector
IPC: A01K97/12
Filed: 1981-02-26
Abstract: The Bite detector comprises a block of material having a bore therethrough for receiving a fishing line and having a slot on an upper surface dimensioned so as to press fit onto a fishing rod. In use the detector is attached to a rod and the fishing line threaded therethrough. After casting, the detector is detached from the the rod and thereby is suspended on the line. A bite on the line will result in an upward movement of the detector.
Patent GB-2071655-A (GB)
Title: N-imidazolyl derivatives of 1- chroman and process for their preparation
IPC: C07D405/04
Filed: 1981-03-02
Abstract: Compounds of formula   <IMAGE> wherein R is C1-C6 alkyl, n is 0, 1, 2 or 3, one of R1 and R2 is hydroxy and the other is hydrogen or C1-C6 alkyl or R1 and R2, taken together, form an oxo group; and each of X1, X2, X3 and X4 independently is hydrogen; halogen; hydroxy; NO2; CN; C1-C6 alkyl; C1-C6 alkyloxy; trihalo-C1-C6 alkyl; -SR% or -COOR%, R% being hydrogen or C1-C6 alkyl;   <IMAGE> each or R_ and R> being hydrogen or C1 to C6 alkyl; or one of X1, X2, X3 and X4 is phenyl, phenylthio, phenoxy or benzyl, optionally substituted by various substituents; or two adjacent X1, X2, X3 and X4 groups, taken together, complete a fused saturated or unsaturated 6-membered carboxylic ring optionally substituted by various substituents; and pharmaceutically acceptable salts of these compounds. The compounds and salts are useful in the treatment of, for example, thrombosis.
Patent GB-2087456-A (GB)
Title: Linings for Sewers
IPC: E21D11/38
Filed: 1981-03-13
Abstract: The lining of a sewer is effected by means of sheets 18, 19 of plastics material so formed and shaped that, when assembled, they conform to the cross-section of the sewer, the longitudinal edges of the sheets being formed with interlocking tongues 20 and grooves 21 whereby the sheets may be connected together to form a lining. The abutting ends of adjacent lining sections may be connected by means of locking rings or by means 22, 23 formed integrally with the lining sheets. <IMAGE>
Patent GB-2075199-A (GB)
Title: Detection system for concealed current carrying conductors
IPC: G01V3/06
Filed: 1981-04-23
Abstract: An underground electromagnetic radiating source is detected by two coils (1, 2) one over the other. To avoid false readings due to air borne signals, their outputs are compared (13) and only if the lower coil (2) output is a predetermined amount greater than that of the upper coil (1) is the output of coil (2) passed to activate audio indicator (21) via switch (15). Automatic gain control (9) is applied to both coil outputs, to limit the gain whenever either output threatens saturation. <IMAGE>
Patent GB-2102351-A (GB)
Title: Pressure indicating device
Inventor: TOMLINSON JAMES ALAN
IPC: G01L7/16
Filed: 1981-05-30
Abstract: A pressure indicating device (10) for a fluid transporting vehicle, e.g. a slurry tanker, comprises a cylinder (11) in which piston (14) is slidable in response to the pressure in a pressure vessel (13) of the vehicle. An indicator rod (19), having markings (24) thereon, is attached to the piston (14) and extends out of an end wall (20) of the cylinder (11). A spring (21) biasses the piston (14) towards the pressure vessel (13) throughout all or the vessel remote half of the piston's travel; in the latter case a second spring (21) biasses the piston (14) away from the vessel (13) throughout the other half of the piston's travel. In alternative arrangements one of the springs may be replaced by a body of gas trapped in the cylinder (11), and the cylinder may be transparent so that the position of the piston (14) can be seen directly. <IMAGE>
Patent GB-2079193-A (GB)
Title: Universal Milling Machine
IPC: B23C1/027
Filed: 1981-06-26
Abstract: A feed drive system for displacing a movable part of a universal milling machine includes an electric motor, a motor brake and handwheel (15). The motor is fixed in a stationary location and connected to the handwheel (15) through a coupling tube (47), the handwheel (15) being slidable longitudinally relative to the coupling tube (47) and being attached to an actuating rod (55) arranged to operate a switch (39) in the circuit of the motor and brake. <IMAGE>
Patent GB-2080674-A (GB)
Title: Disposable protective cap and apparatus and method for its production
IPC: A42B1/04
Filed: 1981-07-30
Abstract: The invention relates to a disposable protective cap, particularly a disposable nurse's cap. The cap is formed from a rectangular sheet of nonwoven fabric having a pair of opposed side edges and a pair of opposed end edges. The sheet is pleated along longitudinal fold-lines parallel to the opposed pair of side edges and the pair of opposed side edges 15 are secured together. The pleats are secured together at one end of the pleated sheet and the other end of the pleated sheet is at least partly elasticated 8, 11 to provide an expandable and contractable opening for the head. The invention also provides an apparatus and method for producing the cap and in particular an apparatus and method for the continuous production of the cap. <IMAGE>
Patent GB-2086494-A (GB)
Title: Clutch facings
IPC: F16D13/62
Filed: 1981-10-02
Abstract: Clutch facings for use in vehicles are moulded from fibres in a thermoset resin using a higher pressure at an inner peripheral portion 3 to produce greater hardness. The facing as moulded has thickness t, overall width l outer peripheral width l1, inner peripheral width b and inner peripheral thickness 10% or less (a) thick on each side than t. The facing is ground to final shape. Asbestos, glass, phenolic resin and carbon fibres are preferred, and a phenolic resin and rubber binder. The differential hardness avoids juddering due to high hardness and irregular disengagement due to low hardness. <IMAGE>
Patent GB-2104320-A (GB)
Title: Obtaining electrical energy from cryogenic fluids
Inventor: REEVE BRIAN ROBERT
IPC: F02C1/04
Filed: 1982-01-14
Abstract: A plant for converting a cryogenic fluid into gas, comprises a container (1) for the cryogenic fluid, means such as a pipe (2) and a pump (3) for supplying the fluid from the container (1) to a vaporising plant (5) for converting the cryogenic fluid into a gas stream at super-atmospheric pressure, means (6, 12) for supplying the gas stream to the inlet of a gas expander (16) which includes a rotor (18) drivable by the gas stream, which rotor (18) comprises an output drive shaft (22), an alternating current generator (28) arranged to be driven by the shaft (22) and a voltage and frequency converter (32) having its input side connected to the electrical output of the generator (28) and its output side connected to an electrical power netwrok (15). The converter (32) is of the kind which, over a predetermined range of the speed of rotation of the generator (28), delivers at its output side electric power at a voltage and frequency which at all times conform to the voltage and frequency of the network (15). <IMAGE>
Patent GB-2114861-A (GB)
Title: Fish-pond ventilating device
Inventor: HATTON KEITH
IPC: A01K61/00
Filed: 1982-02-23
Abstract: A device for providing ventilation through the frozen surface of a fish- pond or the like, thereby preventing asphyxiation of the fish beneath the ice, comprises a hollow preferably generally frusto-conical body 1 formed of a heat insulating material such as expanded polystyrene. The base 2 is open and the body rests on the water 3 with the open base downwards. An aperture 6 is provided through the body at the apex of the conical portion, to allow passage of carbon dioxide outwardly, and air inwardly, and to allow the introduction of fish-food into the water. <IMAGE>
Patent GB-2099569-A (GB)
Title: Duct coupling arrangements especially for heat exchangers
IPC: F28D9/00
Filed: 1979-10-26
Abstract: A combination structure interconnecting and sealing means for joining an air duct with the end plate of a heat exchanger core to allow for variations in spatial dimensions resulting from thermal expansion. The coupling arrangement comprises a circumferential flange attached, as by welding, to the circular duct. The periphery of the flange is provided with radial slots which are engaged underneath T-shaped clips attached to the heat exchanger plate. Within the circumference of the flange and generally in line with the duct and associated manifold section of the end plate is a U-shaped bladder member extending entirely around the joint and welded to provide a seal between the end of the duct and the plate. Similar bladder members are provided between adjacent units making up an overall heat exchanger core.
Patent GB-2104939-A (GB)
Title: Laying pipes
Inventor: WALSH BERNARD
IPC: E21B4/20
Filed: 1982-05-28
Abstract: In a trenchless pipelaying apparatus based on the motion and action of the earthworm a telescopic hollow main body comprising a Nose 2 and Tail 1 section telescopically jointed 3 having the capability for extending or contracting under power. At least one moveable bearing member 4 is carried in the Nose section which is useable as a Nose section anchorage. The tapered Nose section is also provided with a mouth 18 through which excavated material may pass. Effective movement of this anchorage is remotely controllable by power operable means. The connection piece at the back of the apparatus allows the pipeline to be connected to the Tail section. A cartridge 11 of a prepacked impermeable plastic jacket is located in the main body as shown and allows the jacket to be fed out during motion. A hole in the cartridge allows the passage of controls and on larger models of the apparatus passage of earth. Inside the main body an optional auger 6 or archimedean screw is operated by power means. A hatch 9 allows initial prefilling of a free flowing material suitable for use as pipe bedding to be fed through a mouth guard 20. Upon completion this latch allows material to be extracted from within the main body.   In Operation The Nose 2 thrusts forward from the Tail 1 allowing a proportion of earth to enter the hollow body. When fully extended the Nose 2 operates its anchorage plates 4 and mobilises sufficient anchorage to exceed the skin friction acting on the Tail. The Tail is then drawn towards the Nose by power means, feeds out bedding material around the pipe and pulls up the pipeline with it, which is enclosed in a substantially frictionless environment caused by the film of liquid between it and the pipe. <IMAGE>
Patent GB-2123295-A (GB)
Title: First aid apparatus
Inventor: BROWN LINDA CATHRINE
IPC: A61F5/058
Filed: 1982-06-26
Abstract: A support 1 or surgical dressing may be used in combination with other similar supports to make up a field kit. The support 1 comprises a woven fabric backing 2 of two layers which are stitched together along top edge 3 and outermost edges 4 of the ends. Strips of 'Velcro' material 5, 6 are provided on opposing sides of the backing 2 at opposite ends thereof. The ends of the support 1 may be used with a splint to support, for example, a broken limb with said ends being overlapped and held together substantially simultaneously. The support 1 may be provided with glow material and may have a sponge insert or the like to provide a cervical collar. <IMAGE>
Patent GB-2102718-A (GB)
Title: Improvements in or relating to rotary percussive drills
Inventor: SIMPSON FRANK FLINTOFT
IPC: B25D16/00
Filed: 1982-07-21
Abstract: A rotary percussive hand-held electric drill includes an electric driving motor (18) whose direction of rotation is reversible. The motor (18) is coupled to a drill chuck (2) by rotary drive means including unidirectional drive means (13, 15, 16, 17) operable to permit the rotary drive means to transmit to the chuck rotation of the motor in one direction but not rotation of the motor in the other direction. A percussive drive translates rotation of the motor into movement of a member (29) for imparting percussive blows to a drill bit when located in the chuck (2). <IMAGE>
Patent GB-2106887-A (GB)
Title: Cooling method and apparatus
Inventor: O'ROURKE PETER MICHAEL
IPC: C04B40/06
Filed: 1982-07-28
Abstract: Concrete being mixed or agitated in a rotating drum 7 is cooled by injecting a cryogenic liquid into the drum through a probe or lance 7. The drum is rotated at a relatively high speed greater than that required for mere mixing or agitation of the concrete so as to expose an increased or maximum surface area of the concrete. The cyrogenic liquid is introduced into the drum such that the cryogenic liquid makes substantially superficial contact with the concrete. <IMAGE>
Patent GB-2139679-A (GB)
Title: Door frame assembly
Inventor: PASSOVOY RICHARD H
IPC: E06B1/52
Filed: 1982-12-22
Abstract: A door frame assembly comprises a frame member (18) with a web (26) and side flanges (27, 28), the web (26) includes two slots (34, 42) for receiving tongues (53, 55) of an hinge plate (52), a cover section (60) or strike plate. The cover sections (60) finish the frame member (18) around the hinge and strike plates and provide an assembled frame with a continuous surface. The frame member (18) may have a longitudinally-extending ridge (43) between the slots, and the hinge plates (and cover and strike plates) having a complementary groove (57). <IMAGE>
Patent GB-828806-A (GB)
Abstract: 828,806. Rotary lamps. STONECHANCE Ltd. May 15, 1957 [June 4, 1956], No. 17154/56. Class 75(4) A light system for a navigational, identification or other light beacon consists of a fixed lamp mounting and an assembly of translucent panels surrounding and arranged to rotate about the lamp 16, the assembly being divided transversely of the axis of revolution into upper and lower parts which can be relatively adjusted about the axis. The parts comprise sets 1, 2 of half panels mounted between rings 3, 4, 5, 6, the rings 4 and 5 being provided with a series of bolt holes spaced e.g. at 5 degree intervals whereby the parts can be joined in one of a series of selected relations by bolts 8. Each panel is formed of concentric ribs surrounding a central convex boss and may be associated with a fluted spreader lens. The assembly is carried by the shaft 17 driven by a constant speed unit 14 which may be of the type described in Specification 828,805 and is enclosed in a housing having panes 18 held between top and bottom rings 19, 20. Sun-hoods 24, 25 are provided on the top of a housing and around the casing of the driving mechanism.
Patent GB-2113189-A (GB)
Title: Automatic loader and unloader for printed circuit boards
Inventor: MASADA DAIZO
IPC: B65H5/00
Filed: 1983-01-17
Abstract: A mechanism for automatically loading and unloading printed circuit boards 26 from machines 14 for assembling electronic components to boards transports a board from a storage magazine 12 and places the board on an X-Y components placement station of the assembly machine. After the components have been placed onto the board, the board is dropped down through the assembly table and transferred back to the storage magazine, preferably to the same tray 18 of the magazine 12 when of the multi-tray type. Two assembly machines 14 with their associated loading and unloading mechanisms may be placed back-to- back as shown in Figure 1. <IMAGE>
Patent GB-2136210-A (GB)
Title: Method of Forming Substrates
Inventor: WIECH RAYMOND E
IPC: H01L29/06
Filed: 1983-02-14
Abstract: A substrate is formed by moulding a composition comprising a particulate material (e.g. alumina) and a binder to provide a planar mounting area for a heat producing element (2) (e.g. an integrated circuit chip) and a heat sink aperture (9) directly below the mounting area. The binder is then at least partly removed and the substrate sintered. A fluid may be circulated through the heat sink aperture (9) or a heat pipe system may be utilised. Conductive tracks (24) may be provided by moulding grooves in the substrate which are further filled with a conductive ink before firing. The grooves enable connecting wires (3) to cross the tracks (24) without the risk of short circuiting. A method of making a mould of reduced size from a master is described in which the uniform shrinkage of a ceramic when fired is used in a sequence of replicating steps. <IMAGE>
Patent GB-2136918-A (GB)
Title: Pump impeller arrangement
Inventor: DAVY PHILIP ANDREW
IPC: F16D1/091
Filed: 1983-03-22
Abstract: In order to minimise obstruction of the eye and to enable assembly and dismantling by hand, there is provided a centrifugal pump impeller 5 which is threaded directly on to a stub shaft rather than being secured by nuts. It is desired to provide a stop for the motion of the impeller and this is obtained by a taper 8 matching a taper on the stub shaft. Cleanability of the thread form 7 is enhanced by providing a restricted return path for cleaning fluid. Figure 5 shows an axial slot 11 or bore 12 leading to the junction of the thread and taper for this purpose. Other, alternative return paths are shown in other Figures. <IMAGE>
Patent GB-2144286-A (GB)
Title: Digital to analogue converters
Inventor: MALLINSON ANDREW MARTIN
IPC: H03M1/00
Filed: 1983-07-30
Abstract: A digital-to-analogue converter has a reference voltage applied across a series of resistors. Each point (12) between the resistors is connected, individually, to an associated one of a plurality of identical constituent parts (T3, T4) of an output stage, there also being provided within the output stage an amplifier having as an input stage an appropriate constituent part, when driven selectively. In response to each digital input signal, switches of an arrangement of current switches (T1) selectively are actuated, a current is supplied thereby to drive said appropriate part of the output stage, causing the potential of the corresponding point of the resistor series, to cause a related analogue voltage at the converter output (26). The converter is fast acting, currents being operated upon within said parts of the output stage, and the arrangement of switches. Conveniently, in the output stage each said part comprises a differential pair of bipolar transistors (T3,T4). <IMAGE>
Patent GB-2125745-A (GB)
Title: Tricycle
Inventor: DUNCE JOHN JAMES
IPC: B62K5/00
Filed: 1983-08-16
Abstract: The tricycle rear chassis (46, 48) is mounted to the main frame (10) through a flat suspension member (44) made from upper and lower pairs of spring steel strips (64, 66) sandwiching a rubber block (72). This gives up-and-down resilience without lateral movement, and also gives torsional resilience so that the main frame can tilt relative to the rear chassis but is urged by the suspension member towards a normally upright position. <IMAGE>
Patent GB-2126250-A (GB)
Title: Production of electrotinned goods free from whiskers
Inventor: ASCHER DIETRICH
IPC: C25D5/50
Filed: 1983-09-07
Abstract: Process for the production of electrotinned goods, in particular electrotinned wires, substantially free from whiskers, characterised in that the electrotinned goods are subjected to subsequent heat treatment, during which they are heated to a temperature just below the melting point of the tin applied by electroplating or below the eutectic temperature of the tin alloy applied. The tinned goods are preferably heated to a temperature from 5 DEG C to 30 DEG C below the melting point of tin or below the eutectic temperature. Heating preferably carried out in an inert gas.
Patent GB-2129293-A (GB)
Title: Shower cubicles
Inventor: BARRON ARTHUR
IPC: A47K3/28
Filed: 1983-10-06
Abstract: A shower cubicle has a cabinet 2 which is integrally moulded with a tray 8 and rear and side walls 4 and 6. A mixer valve 26 and a shower head 24 are securely fastened to the cabinet and secured in a sealing manner by resin and resin reinforcement 40, 42. <IMAGE>
Patent GB-2128699-A (GB)
Title: Improvements in hydraulic anti- skid braking systems for vehicles
Inventor: FARR GLYN PHILLIP REGINALD
IPC: B60T8/42
Filed: 1983-10-19
Abstract: Operating fluid from a supply (15) e.g. a master cylinder to a vehicle brake (32) is modulated in accordance with skid signals from skid sensing means suitably an opto-sensor (5, 6) which signals are electrical in nature, and an hydraulic pump (2), e.g. wheel-driven, incorporating at least one plunger (10) working in a bore (11) has a working chamber (23) to control brake re- application following skid correction. Fluid from the supply (15) to the brake is modulated by a solenoid-operated valve assembly (3) which is responsive to the skid signals, the valve assembly incorporating a normally-open isolating valve (47) disposed between the supply and the brake, and a normally closed dump valve (46) disposed between the brake (32) and a reservoir (35) for fluid. An arrangement employing twin pumps for a dual circuit systems disclosed. An alternative construction of the valves 46, 47 is also disclosed. <IMAGE>
Patent GB-2151905-A (GB)
Title: Footwear
Inventor: COOPER PHILIP ROY
IPC: A43B3/02
Filed: 1983-12-21
Abstract: An article of footwear comprises a sole 2 and a heel supporting member 12, with an upper 10 comprising a sleeve of flexible material having a first-end portion secured at margins thereof to marginal portions of the sole 2, a second end portion of the sleeve being open to receive the wearer's foot, and a fastening means adapted in use to gather or pleat material of the upper against the front of the wearer's foot in the region of the instep and heel end thereof without imposing any predetermined shape on the upper in the region of the toe end portion of the foot. <IMAGE>