baber/WOPTO huggingface dataset:
Patent GB-1303540-A (GB)
IPC: G05D16/20
Filed: 1970-12-30
Abstract: 1303540 Automatic pressure control B H HADLEY 30 Dec 1970 [6 March 1970] 61822/70 Heading G3R [Also in Division F2] In a system in which high and low-pressure sources are coupled through electromagnetic valves to an output line, the pressure in the latter is compared with a reference pressure by a manometer, the error signal from which varies in opposite senses energization of the valves and hence the forces applied to the valve poppets, portions of which are of magnetic material. In Fig.1 fluid-pressure in a conduit 26 is applied to a fixed cistern 10 of a mercury manometer having a moving cistern 11 associated with a vacuum conduit 25 and elevated by a lead screw 28 to a position corresponding to a desired pressure to be maintained in conduit 26. Coarse, initial, errors between the pressure in conduit 26 and the desired pressure are detected by a differential pressure device 14 adjusting a capacitor 17 arranged in a bridge circuit 32 so that, with a switch 38 in a position opposite to that shown, the coarse error signal is applied through lead and normal operational amplifiers 41, 42 to a power amplifier 43 controlling valves 40 to adjust the flows in a high-pressure conduit 39 and a vacuum conduit 39<SP>1</SP> in opposite senses until the pressure in conduit 26 is more nearly correct. Then switch 38 is operated manually or automatically to the position shown and a valve 29 is opened so that in addition to applying the coarse error signal to amplifier 41, a fine error signal derived from capacitors 15 and 16, responsive to the mercury levels in cisterns 10 and 11 and arranged in a bridge circuit 35, is applied to amplifier 42. The output of amplifier 43, indicated at 61, 62 in Fig.2, is applied to moving coil-operated poppet valve 51, 50 to adjust the flows in high-pressure conduit 39 and vacuum conduit 39<SP>1</SP>. To prevent sticking valve seatings 110 are non-magnetic but valves 55 are of magnetic material so that they are attracted to a permanent or electromagnet 117 attached to the moving coil 58. Diaphragm-operated ball valves 52 and 53 differentially responsive to the pressures on each side of valves 50, 51 control the flow to the latter so as to keep the pressure drop across them constant. The gains of amplifiers 41, 42, which have capacitive feedback, are automatically varied in a non-linear manner by photo-sensitive feedback resistors responsive to the magnitude of the pressure in conduit 26.
Patent GB-2034839-A (GB)
Title: A coupling element and pipe coupling for use with jacketed pipes
IPC: F16L39/00
Filed: 1978-08-15
Abstract: The invention concerns a coupling element and pipe coupling for use with jacketed pipes, i.e. pipes having an inner main flow passage and an outer coaxial auxiliary flow passage. The coupling element comprises a radially inner part 8 having a first annular section 11 for securing to the inner pipe 3 of the jacketed pipe and defining an inner bore for alignment with the main flow passage. A radially outer part 9 of the element has a second annular section 12 for securing to the outer pipe and a passage extends between the inner and outer parts and opens at one end between the first and second annular sections and at the other end into an axial face 13 of the element. The element may be secured to a second element with the axial faces 13, 22 of the elements confronting one another, the inner bores aligned and the passages in communication with each other to form a pipe coupling. In the coupling a first sealing member 25 is included between the axial faces and radially inwardly of the passages and a second sealing member 26 is provided between those faces and radially outwardly of the passages. <IMAGE>
Patent GB-2007454-A (GB)
Title: Laser warning devices for indicating receipt of laser radiation
IPC: G01S3/783
Filed: 1978-09-05
Abstract: Comprises laser radiation detectors 2, 3, 4, 5 sensing receipt of laser radiation from a respective sector, and connected via threshold detectors 26 to 29 and inverters 30 to 33 to J inputs of JK flip-flops 34 to 37 with indicators 14 to 17, (lamps) connected to the Q outputs thereof. NAND-gate 38 has four inputs connected to the outputs of the threshold detectors 26 to 29 and an output connected via inverter 39 to a first input of an RS flip-flop 40 and to clock inputs of the flip-flops. The outputs of the RS flip-flop 40 are connected back to a fifth input of the gate 38 and via a monostable circuit 41 and a pulse former 42, to clear inputs of the flip- flops and to the other input of the RS flip-flop 40. The threshold detectors render the device insensitive to radiation below a particular threshold. Items 34 to 42 act as a radiation time of arrival discriminator such that on receipt of direct radiation by one or more of the detectors the associated 14 to 17 will be lit and the device will be rendered insensitive to delayed reflected radiation for a short predetermined period (mono 41) thereafter. <IMAGE>
Patent GB-2020725-A (GB)
Title: Improvements in or relating to lockable clips
IPC: A62B35/04
Filed: 1978-09-18
Abstract: A clip for use with a safety harness has a body 10 shaped to define a hook, a latch 12 which is mounted so as to be movable relative to the body 10 between a first position in which it closes the mouth of the hook (as shown) and a second position in which the mouth is open, and a locking member 14, 45 which is biassed towards a position (as shown) in which it retains the latch 12 in its first position, the locking member 14 being movable (counterclockwise, as shown) against the bias to a position in which the latch 12 can be moved to its second position. <IMAGE>
Patent GB-2010564-A (GB)
Title: Bell Ringing Mechanism
IPC: G10K1/34
Filed: 1978-11-01
Abstract: A bell-ringing mechanism has a drive motor 5 for effecting swinging movement of the bell in both directions. The change of direction of the drive of the motor is effected through a reversing circuit and power is fed to the motor through a switching device which allows the time of switching on and switching off of power to the motor to be independently altered for both directions of swinging movement of the bell. <IMAGE>
Patent GB-2029722-A (GB)
Title: Pressure cookers
IPC: A47J27/08
Filed: 1978-11-17
Abstract: An automatic domestic pressure cooker, which can be adjustably preset to cook for a period of which the start may be adjustably preset and of which the termination is automatic, includes a valve 28 which can close to seal a cooking chamber and a thermal sensor 26 which is disposed to sense a vapour temperature between 2 DEG  and 5 DEG C below the boiling point of water, and to cause consequentially the closure of the valve. The cooker includes an electrical heating element 3 disposed in the base of the bowl which sits in a recess in a plinth carrying the electrical controls. The element is controlled by a regulator 19 which maintains the chamber during cooking at a predetermined temperature above the boiling point of water. The cooker includes a timer 20 which, at the end of the period of cooking, causes the venting of the cooking chamber if desired, and either the cessation or reduction of heating of the cooker by the heater. <IMAGE>
Patent GB-2009391-A (GB)
Title: Solar heaters
IPC: F24S23/30
Filed: 1978-11-29
Abstract: A solar heat is composed of a series of cylindrical or spherical lenses (17) mounted side by side to focus incident radiation on to a collector (11, 12) below the series. Between the collector and the series of lenses is a barrier (13, 14) formed with slits or holes. The barrier is positioned for the slits or holes to be at the focal lines or focal points of the lenses. The side of the barrier facing the collector is gilded to reflect low frequency radiations from the collector. <IMAGE>
Patent GB-2012779-A (GB)
Title: U.V.-Curable Resins
IPC: C08G12/46
Filed: 1978-12-20
Abstract: U.V.-curable compounds of low viscosity are prepared by reacting hexamethoxymethyl melamine with from 2 to 4 moles of hydroxy compound, comprising 1 to 4 moles of a monohydroxy compound prepared from equimolar amounts of a glycidyl alkanoate and acrylic acid, with optionally up to 2 moles of hydroxyethyl acrylate and/or up to 0.5 mole of a polyalkylene glycol.
Patent GB-2057483-A (GB)
Title: Abrasive Papers
IPC: B24D11/00
Filed: 1979-03-24
Abstract: Abrasive papers comprising a multiplicity of relatively small perforations spaced over the area of the paper.
Patent GB-2046728-A (GB)
Title: Derivatives of Tetrahydroxadiazin-3,5 Dione as Agents for Plant Growth and Development Control
IPC: A01N43/88
Filed: 1979-04-17
Abstract: Compositions and methods for plant growth control utilize as active component a compound of the formula:   <IMAGE> wherein R<2> is phenyl or phenyl substituted with methyl, tert-butyl, nitro, or one or two halogens; R<4> is hydrogen, methyl, chlorophenyl, or 2,4-dichlorobenzoyl; R<6> is hydrogen, C1-C3 alkyl or phenyl, provided that when R<2> is an unsubstituted phenyl and R<6> is a C2 or C3 alkyl then R<4> is not hydrogen.
Patent GB-2039496-A (GB)
Title: Cored acrylic polymers
IPC: C08F285/00
Filed: 1979-05-03
Abstract: A resilient, acrylic graft polymer is produced by a four stage, sequential polymerization in which the products of the first and third stages are elastomeric, while those of the second and fourth stages are non-elastomeric. In stages 1 and 3, the monomer comprises a C1-8 alkyl acrylate, while in stages 2 and 4 it comprises a C1-4 alkyl methacrylate. Upon blending with a nonresilient methacrylic matrix resin, followed by molding, an impact resistant molded product is obtained which has low stress-whitening, generally does not show substantial crack propagation on impact and does not readily break on subjection to fold endurance tests.
Patent GB-2053329-A (GB)
Title: Road surfacing
IPC: E01C7/26
Filed: 1979-05-23
Abstract: A road or like construction has a wearing course (4) comprising a compacted composition including an aggregate (5) and a binder (6) therefor, such as tar or bituminous macadam. Hardened cementitious material (8) such as Portland Cement is located in the voids (7) between adjacent particles of aggregate in the wearing surface of the course. The cementitious material may be applied to the wearing course in dry powder form by means of a brush. <IMAGE>
Patent GB-2042694-A (GB)
Title: Fuzes for Guided Missiles
IPC: G01S13/18
Filed: 1979-06-26
Abstract: A pulse-radar proximity fuze for detonating a warhead of a flying body such as a guided missile when the flying body is at a required distance from the target comprises a pulsed radio frequency transmitter 13 which transmits signals towards a target. Reflected signals are received and passed to a range gate 18 which opens between successive transmitted pulses for a time interval which corresponds to the time interval during which a received signal generated by reflection from the target of the last transmitted pulse would be received were the target at a range at which detonation of the warhead is required. Signals passing the range gate are used to detonate the warhead. <IMAGE>
Patent GB-2035684-A (GB)
Title: Subdividing semiconductor wafers
IPC: H01L21/30
Filed: 1979-10-12
Abstract: A substrate 10 having epitaxial layers 11, 12, 13, 14 forming double heterostructure lasers is subdivided by anisotropically etching V-grooves 22 in the lower face of the substrate and then mechanically cleaving or breaking along lines 20. The resulting bars are scribed and broken along lines 23 to form individual laser diodes. When the wafer is 3 to 5 mils thick the V-grooves preferably extend to 1 to 2 mils less than thickness of the wafer. When the wafer is 6 to 10 mils thick preferably a parallel-sided channel is first formed followed by V-grooving. The method results in cleaved faces with little mechanical damage in the active area and produces diode lasers of uniform length. <IMAGE>
Patent GB-2038432-A (GB)
Title: Hydraulic Supply Priority Valves
IPC: F15B1/027
Filed: 1979-11-13
Abstract: An accumulator charging valve (1) connected to a pump (3) gives to a port (9), which is connected to a brake booster (11), priority of supply over port (5), which is connected to power steering gear. When accumulator pressure is low, ball valve (13) allows flow from pump (3) through passage (14) and throttle (6) to the non-return valve (8) in the accumulator inlet, and to the inlet chamber (21) of control valve (19), so that when the booster (11) operates, pressure in line (3) moves the control valve spool (27) and pressure from chamber (21) closes the valve (4). When accumulator pressure is high, ball valve (13) closes throttle (6) and vents passages (18,21) so that there is no control pressure available to close valve (4). The fluid source (3) thus only has to deliver fluid under high pressure if the booster is in operation, thereby reducing noise and prolonging the life of the pump as well as reducing the pump's energy consumption. <IMAGE>
Patent GB-2063290-A (GB)
Title: Production of shale oil
IPC: C10G1/00
Filed: 1979-11-15
Abstract: In a two-stage continuous process for the production of shale oil, oil shales are first at least partially dehydrated in a vessel 3 at up to 550 DEG F and are then retorted in a vessel 3' at a higher temperature (800 to 1000 DEG F) for a mixed yield of hydrocarbons and other products via line 3b. In both stages heat is applied indirectly through the walls of the vessels so as to reduce the amount of contamination of the products. The capacity of the first vessel (3) is lower than that of the second (3'). The preliminary dehydration reduces the amounts of pitchy products and hence "stickiness" liable to be encountered during retorting and thereby increases the flexibility available. <IMAGE>
Patent GB-2071224-A (GB)
Title: Sealing device for a roller bearing having an outer race with rib
IPC: F16C33/80
Filed: 1980-03-04
Abstract: In a sealing device for a roller bearing having an outer race having an radially inwardly directed rib at at least one end thereof, a seal held on the rib of the outer race has, on the outer periphery thereof, a concave peripheral groove engaging the rib with a suitable clearance interposed therebetween, the seal is of the floating type in which the inner diameter of the seal is greater than the outer diameter of a shaft, and the clearance between the rib of the outer race and the shaft is sealed by the seal of the floating type. <IMAGE>
Patent GB-2050721-A (GB)
Title: Battery charging apparatus
IPC: H02J7/04
Filed: 1980-04-10
Abstract: In a battery charger of the kind in which pulsating d.c. is supplied to the battery (6) from the rectified output of transformer (1) until a threshold device 15 detects the battery is charged, a bimetallic strip (9, 10) responds to the charging current. If the battery draws high current, say upon initial charging, then resistor 9 heats up strip 10 causing it to break the circuit until the strip cools. The resistor and bimetal strip are chosen so as to allow an average current flow within the capabilities of transformer 1, thus obviating the need for a current limit resistor, and protecting the circuit. Once the battery has charged sufficiently, the bimetallic strip ceases to operate. The device is said to enhance reliability and to permit a smaller and lighter transformer to be used. <IMAGE>
Patent GB-2074731-A (GB)
Title: Machining monitor
IPC: G01N29/14
Filed: 1980-04-16
Abstract: A method and apparatus for detecting faults in the material of a workpiece during machining. The method involves the use of a transducer (13) which detects the acoustic emission from the machining process, and signal processing and display equipment (14, 15, 16, 17) which indicates when the acoustic emission is greater than a predetermined value and the position of the tool at that time. These peak values of acoustic emission have been found to correlate with faults in the material, hence the positions of faults may be indicated. <IMAGE>
Patent GB-2053912-A (GB)
Title: Acylaminobenzoic acid derivatives
IPC: C07D235/08
Filed: 1980-06-23
Abstract: Acylaminobenzoic acid derivatives of the formula:-   <IMAGE> [wherein R<1> represents a hydrogen atom, an alkyl group containing from 1 to 6 carbon atoms (which may be substituted by one or more than one of the same type of substituent selected from the hydroxy group, alkenyl groups containing from 2 to 5 carbon atoms and alkanoyloxy groups containing from 2 to 7 carbon atoms), R<o> represents a hydrogen atom or a group of the formula -COR<2>, and R<2> represents an alkyl group containing from 2 to 20 carbon atoms], which are new compounds, possess pharmacological properties and are useful inter alia in the prevention or treatment of atherosclerosis.
Patent GB-2080215-A (GB)
Title: Gliding type parachute
IPC: B64D17/02
Filed: 1980-07-24
Abstract: Aerodynamic slots in a gliding type parachute or other flexible air sustained membrane, have normal tape or webbing reinforced edges, but differ from what is known by having their two edges A, B equal or nearly equal in length, and with load suspension lines L attached to one edge B. A plurality of slots is arranged in lines, parallel or nearly so, one to the other, e.g. on a square or rectangular canopy, so that this arrangement of slots and suspension lines geometrically arranged, will cause what laid out without load is a flat canopy, upon deployment under load, to form lift generating sections with the required angle of attack, whereby each open slot directs its maximum air efflux at and over a shaped aerodynamic lift generating section of the canopy membrane behind it. A restraining line R may connect the two edges of a slot, or a control line T may be attached to the upper edge A of a slot to control opening and aerofoil geometry and hence descent rate, forward speed, or direction. <IMAGE>
Patent GB-2056179-A (GB)
Title: The mounting of circuit breakers
IPC: H02B1/052
Filed: 1980-08-01
Abstract: An array of circuit breakers are mounted on an assembly, comprising a mounting rail (20) with a mounting flange (28). For engagement by a catch assembly 16 on the circuit breaker when attached to a bus bar (42) the mounting rail (20) having stabilising means (32) which, are engaged by the catch assembly 164 to restrain movement of the circuit breaker relative to the mounting rail (20) in a direction longitudinally of the mounting rail. In modifications the outer ends 18 of the spring catch may engage over or between projections of the rail 20 extending beyond the circuit breaker wall or may engage the edge of the rail frictionally. <IMAGE>
Patent GB-2081796-A (GB)
Title: Lever Locks
IPC: E05B25/02
Filed: 1980-08-05
Abstract: A lock and key-assembly, the lock including a bolt 12 movably mounted within the body of the lock for movement between a retracted and an extended position, a group of levers 18 pivotally mounted in the body for movement between first and second positions, the levers each having a gate formation 18b for co-operation with the bolt for preventing its movement to its retracted or extended position when the levers are in their first position, the gate formations of the levers when in the second position being aligned to permit the bolt to move to its retracted or extended position, at least one of the levers including a drive abutment member 22 which extends across levers for engagement therewith so that on movement of the one lever to its first position from its second position the drive abutment member positively engages to other levers to ensure that they are also moved to and retained at their first position. Movement of the bolt 12 is achieved by drive means 29 which includes a projection 30 mounted on a disc 31 which is rotatably mounted in a recess formed in a back plate 14, shaft 34 serving as a guide for a key. <IMAGE>
Patent GB-2061106-A (GB)
Title: Chairs
IPC: A47C3/22
Filed: 1980-10-02
Abstract: A chair provided with a seat carrier and an associated backrest carrier includes a pneumatic spring connected between the seat carrier and backrest carrier, and a mechanical draw spring one end of which is connected directly to the backrest carrier and the other end of which is connected to an adjustable lever pivotally mounted on the seat carrier. The pneumatic spring and mechanical spring are disposed in side-by-side parallel relation to one another between a pair of generally vertical spaced bars forming a portion of the backrest carrier. The force exerted by the mechanical spring is in opposition to the restoring force exerted by the backrest carrier so that movement of the lever to increase the force exerted by the mechanical spring reduces the total restoring force exerted on the backrest carrier.
Patent GB-2087945-A (GB)
Title: Thermal insulation of Buildings
IPC: E04B1/76
Filed: 1980-11-18
Abstract: Curable urea-formaldehyde resin foam, optionally containing reinforcing fibres, is applied to a surface of a building and a layer of a curable composition is thereafter applied as a protective cladding. The curable composition may be a fibre-reinforced cement. The building surface is initially roughened to provide a key. Both layers may be sprayed onto the surface.
Patent GB-2066980-A (GB)
Title: Improvements in and relating to microfilm reading apparatus
IPC: G03B21/11
Filed: 1980-12-12
Abstract: A microfiche 11 is held on a holder 7 comprising a flat transparent plate 8, and is covered by a transparent sheet 10, which adheres to plate 8 and/or microfiche 11. Guide means on the underside of the holder 7 engage guide means on a support unit to guide movement of the holder relative to the support unit in one direction. The support unit is itself movable in a perpendicular direction. <IMAGE>
Patent GB-2069279-A (GB)
Title: Surface-acoustic-wave parametric device
IPC: H03H9/64
Filed: 1980-12-22
Abstract: A surface-acoustic-wave parametric device wherein the width of a parametric interaction region M in a direction perpendicular to the SAW propagation direction is varied so as to correspond to a desired frequency characteristic. <IMAGE>
Patent GB-2066796-A (GB)
Title: Beverage dispensing machine
IPC: G07F13/10
Filed: 1980-12-31
Abstract: A dispensing device for use in a beverage dispensing machine includes a chute 13 from a cup dispensing device 10 to a cup filling station. A cup arrestor, e.g. a solenoid operated finger 16, is provided to selectively arrest cups. An ingredient, e.g. sugar, is fed from a hopper 21 by a worm feed 20 driven by a motor 19 into the arrested cup. Below the cup filling station, and a perforated shelf 14 is an overflow tray 15 having a level sensing float 27 to trigger a micro-switch 30 to override operation of the dispensing machine. <IMAGE>
Patent GB-2092304-A (GB)
Title: A Device for Measuring the Thickness of a Metal Deposition Layer
IPC: G01N27/28
Filed: 1981-01-27
Abstract: A device for measuring the thickness of a metal deposition layer on a metal foil 29, the device having an electrolyte chamber 11 which, on the side facing the foil, has an opening for letting through electrolyte to the foil, a cathode in the electrolyte chamber, and a supply conduit 51 for the electrolyte, connected air-tight and liquid-tight to the electrolyte chamber. The electrolyte chamber is connected to an under-pressure flow- off line 49, which is located at a distance from the mouth of the supply line in the electrolyte chamber. An under-pressure generator 34 is connected to the flow-off line. The supply line is also under-pressure- proof and runs continuously into the fluid volume of a supply vessel 56 for the electrolyte, which has a connection 61 with the atmosphere. <IMAGE>