baber/WOPTO huggingface dataset:
Patent GB-2019151-A (GB)
Title: Improvements in sampled analog filters
IPC: H03H11/12
Filed: 1979-04-03
Abstract: An integrator circuit of the type having an operational amplifier with an integrating capacitor (C1) in a feedback loop from its output to its input and having a switched capacitor (K0C1) as equivalent of a resistor connection between a signal source and said input, is characterized in that said switched capacitor is alternately discharged and connected between said signal source and said input with a predetermined frequency, by means of FET switches operated by clock pulses  phi 1,  phi 2. A second stage of similar form, but having its switches energised in a different sequence is connected in cascade with the first to provide a second order biquadratic filter. <IMAGE>
Patent GB-2046114-A (GB)
Title: Apparatus for the separation of material suspended in a liquid
IPC: B01D33/00
Filed: 1979-04-10
Abstract: Apparatus for the separation of material suspended in a liquid, comprising a vessel 2 into which the suspension to be treated is fed and a rotary filter drum partially immersed in the suspension, wherein this filter drum together with another drum form a pair of cooperating, counter- rotating drums 1 of which at least one is a filter drum rotatably mounted on two end carrier means, a stationary shield arrangement 7 being mounted on the carrier means within the drum and dividing the interior of the drum into sections, at least one of these sections C-F being connectable to a vacuum source for reducing the air pressure in that section. The filler is cleaned by a high pressure blast applied through section I and the sludge removed by a scraper 15. <IMAGE>
Patent GB-2046493-A (GB)
Title: Safety device for cycles
IPC: B62J6/20
Filed: 1979-04-11
Abstract: A safety attachment for a cycle wheel comprising an annular disc (10) made of flexible or resilient sheet material and having a light-coloured or reflective surface of each side of the disc, the disc having a slit (13) extending from its inner (11) to its outer circumference (12) whereby the disc can be attached to the wheel (16) of a cycle between the hub (17) and the rim (18) by being interwoven between the spokes (15). <IMAGE>
Patent GB-2022649-A (GB)
Title: Support frame for galleries and tunnels
IPC: E21D11/18
Filed: 1979-04-20
Abstract: A closed support frame for galleries or tunnels consists of a U-shaped arch portion (1) to which a straight floor beam (2) is connected. In order to enable the floor beam (2) to resist the rock pressure from below, it has upward projecting lugs (11) to which are connected the legs of the U-shaped portion (1). The lateral rock pressure causes the floor beam (2) to bend downwardly so that any rock pressure acting from below can be absorbed. The floor beam may be in two parts slidable relative to one another and held together by clamps. <IMAGE>
Patent GB-2020001-A (GB)
Title: Burner
IPC: F24C3/10
Filed: 1979-04-23
Abstract: A gas burner for use on a cooker hot plate 1 incorporating the electrodes of a spark ignition/re- ignition system comprises an annular body 2 of an electrically insulating material (e.g. ceramic material), a steel spillage cap 3 fitted above the body so as to define burner flame ports 4 therebetween, the spillage cap providing one electrode at earth potential of the ignition system, and a narrow metal rim 6 fitted as an integral part of the body 2 in its outer peripheral surface below the burner flame ports, which ring provides the other high tension electrode of the ignition system. The respective electrical connections to the electrodes pass through the burner body for connection to an electric circuit arrangement below the cooker hob plate. <IMAGE>
Patent GB-2030132-A (GB)
Title: Polyhalogenated hydrocarbons, useful as insecticide intermediates, and methods for their preparation
IPC: C07C19/14
Filed: 1979-05-10
Abstract: Polyhalogenated hydrocarbons of general formula RR<1>CH-CHX-CH2CYZQ wherein R is hydrogen or lower alkyl, R<1> is lower alkyl, X is Cl, Br or I, Y is F, Cl or Br, Z is Y or Q and Q is a group W(CF2)m- in which W is hydrogen, F or Cl and m is 1 or 2, provided that X is always Br or I when at least one of Y and Z is Br, and a process for preparing these polyhalogenated hydrocarbons by reacting an alkyl-substituted butene with a polyhalogenated alkane having from 2 to 4 carbon atoms, in the presence of a catalyst.
Patent GB-2040850-A (GB)
Title: Helicopter rotor
IPC: B64C27/32
Filed: 1979-05-14
Abstract: A helicopter rotor includes a rotor head 11 comprising a hollow structure 13 and the rotor blades (not shown) are each supported via a spindle 15 in a hollow elastomeric bearing 16 arranged to permit blade flap, lead/lag and feathering movements. A resilient support means 29 is housed within the structure 13 and is operatively associated with each rotor blade so as to provide controlled restraint of rotor blade movements in the blade flap plane. In the illustrated embodiment, the support means 29 comprises interconnected inner and outer elastomeric assemblies 30,31, the outer assembly 30 being connected to each rotor blade through a common elastomeric lead/lag damper unit 19 which provides inter-blade damping of blade lead/lag movements. The outer elastomeric assembly 30 also provides an automatic blade droop stop. <IMAGE>
Patent GB-2022808-A (GB)
Title: Improvements in or relating to heat pumps
IPC: F25B13/00
Filed: 1979-05-23
Abstract: A heat pump adaptable for air conditioning or refrigeration use by reversing flow through condenser 101 and evaporator 103 and having a compressor 109 driven by a polyphase electric induction motor 110, the heat transfer capacity and direction being controllable by controlling the speed and direction of the motor using control equipment to sequentially switch a DC power supply. Both the frequency and effective average phase voltage may be varied to suit the load. The compressor may be of the intermeshing rotor type having several stages, and the motor and compressor are mounted in a sealed casing. The control equipment comprises an electric logic system. <IMAGE>
Patent GB-2026064-A (GB)
Title: Tunnel linings
IPC: E21D11/08
Filed: 1979-07-25
Abstract: An arcuate tunnel unit comprises an arcuate cast concrete block (13 or 14) having a projection on one end face and a recess in the other end face. An arcuate tunnel lining segment (10) is built from three units (13, 14, 13) arranged end-to-end with adjacent projections and recesses inter-engaging. The units (13, 14, 13) are held together during handling and erection in a tunnel by a pair of tie rods (16) passing through channels in the blocks and engaging nuts (17) in pockets (15). An annular ring is built from a number of segments (10), adjacent segments being held together by tie-rods (18) and specially adapted blocks (not shown) being used at two opposed locations in the rings. The depth of each recess is less than that of each projection to permit limited relative tilting of the block and the gaps between adjacent end faces of the blocks on either side of the projections and recesses may be filled with compressible filler material. <IMAGE>
Patent GB-2028231-A (GB)
Title: Tank wall structure of a foam sandwich
IPC: B32B5/14
Filed: 1979-07-31
Abstract: A tank structure for a road vehicle has an inner monocoque commodity container 1 of GRP totally enclosed within an outer monocoque structure 2 of GRP and a load bearing foamed plastics material 3 filling the interspace therebetween and formed in situ in discrete volumes, the foam forming the sole loading bearing connection between the inner container and outer structure. To avoid propagation of stress fracture lines through the foam mass 3 the latter is injected dose-wise in discrete volumes forming balloons which skin on their surfaces to form a cohesive but not homogeneous structure. The skinned surfaces provide random paths for propagation of stress lines to prevent a single fracture line forming under high shear loading. <IMAGE>
Patent GB-2030135-A (GB)
Title: 4-Oxo-1-azabicyclo (3.2.0 heptan- 7-ones
IPC: C07D503/00
Filed: 1979-08-08
Abstract: The present invention relates to compounds of the formula (II):   <IMAGE> wherein R is (a) a hydrogen atom, (b) a lower alkyl group or (c) a lower alkyl group substituted by a lower alkoxy group which may optionally be in cyclic form. These compounds have been prepared in optically pure crystalline form and have been found to possess ???- lactamase inhibitory properties.
Patent GB-2028354-A (GB)
Title: Process for preparing fire retardant polyurea foams
IPC: C08J9/00
Filed: 1979-08-13
Abstract: A polyurea foam is prepared by reacting an aromatic polyisocyanate, as isocyanate component, with a composition containing water, a catalyst and a flame retardant, as water component. Various surfactants have been found which, when incorporated in the water component, enable a stable emulsion to be formed. This enables the flame retardant to be incorporated into the water component and not, as previously, into the isocyanate component and it thus becomes possible to use less isocyanate component in relation to water component than was previously necessary. The water component containing a tris(haloalkyl) phosphate as flame retardant and an aliphatic amine or imidazole as catalyst is also provided, in the form of a stable aqueous emulsion. Suitable surfactants are blends of fatty acid esters and polyalkylene ethers of a mixture of sorbitan mono-oleate and an ethoxylated sorbitan mono-oleate.
Patent GB-2057236-A (GB)
Title: Rush cutter
IPC: A01D44/00
Filed: 1979-09-07
Abstract: A rush cutter for cutting rushes in a body of water comprising an elongate blade (2) mounted transversely between two arms (1) of which the upper ends are swivellably attachable to a boat (6), for instance in the oarlock holes. The arms point obliquely rearward towards the bottom of the body of water, and the blade (2) is swivellable upward from the bottom with a view to avoiding obstacles and to discontinue work. The upper ends of the arms (1) are interconnected by means of a transverse rod (3) and the rod carries sleeves (4) which are turnable and axially displaceable to the rod. The sleeves (4) have pins fitting into the oarlock holes and securable therein. A transverse control rod (7), by which the position in height of the blade (2) is controllable, is attached to the arms (1). <IMAGE>
Patent GB-2033929-A (GB)
Title: Process for dyeing and printing cellulose fibres
IPC: D06P3/60
Filed: 1979-10-02
Abstract: Cellulose fibres which can be swollen with water-miscible swelling agents or mixed fibres containing these fibres, are dyed or printed with dyestuffs which are free from sulphonic acid groups and carboxylic acid groups, of the general formula   <IMAGE>  wherein R represents halogen or optionally substituted alkyl, alkoxy or acylamino,  n represents the number 0, 1, 2 or 3,  X represents hydrogen, NH-A or   <IMAGE> A represents hydrogen or optionally substituted alkyl, cycloalkyl, aryl or acyl and the radicals Y independently of one another represent hydrogen, NH-A, hydroxyl or alkoxy, or one Y represents   <IMAGE> and the other Y represents hydrogen or NH-A, and the dyestuff is fixed by heat treatment. Blends of cellulose with polyester or polyamide fibres are employed.
Patent GB-2061811-A (GB)
Title: Cooling blown extruded tubular film
IPC: B29C48/10
Filed: 1979-11-02
Abstract: A tube (4) of plastics material extruded by an extruder (1), is inflated by compressed air from a nozzle (6) and the expanded tube (7) is passed between pinch rollers (8) to a storage roll (9). To expedite cooling of the inflated tube (7), the tube (7) is surrounded by a column (10) and cooled air from a fan/cooler unit (12) is supplied through a hose (13) to an annular space (11) between the tube (7) and the column (10) and extracted from the space (11) by a hose (14) and returned to the unit (12). Irises may be provided at the top and bottom of the column (10) to seal the ends of the space (11) and plenums at the top and bottom of the column (10) preferably cause a toroidal air flow in the space (11). <IMAGE>
Patent GB-2041497-A (GB)
Title: Gate valve
IPC: F16K3/18
Filed: 1980-01-02
Abstract: A gate valve for fluids comprises a closure element 5 consisting of two valve discs 6 and 7 and a chamber 16 therebetween of alterable volume which is charged with a pressure medium in order to press the discs against seats 3 and 4. To open the valve, the valve discs are retracted towards each other away from the seats and the closure member 5 is displaced sideways by an arm 11. In order that relatively high closing forces can be generated with low medium pressure, a second chamber 33 comprising plates 34 and 35 connected by a bellows 36 is disposed in the chamber 16. Plate 34 is rigidly connected by rods 37 to the non-adjacent valve disc 7, and plate 35 is connected similarly to valve disc 6 by rods 38. The force acting on each valve disc due to pressure medium in the chamber 16 is thus increased by the force acting in the same direction on the connected plate. <IMAGE>
Patent GB-2039611-A (GB)
Title: Using exhaust gas expansively in inoperative cylinders of a Otto or Diesel cycle internal combustion engine
IPC: F02B75/18
Filed: 1980-01-09
Abstract: An internal combustion engine, comprising cylinders (1-4), intake valves (9-12), exhaust valves (13-16), and exhaust ducts (5-8), includes an auxiliary duct (21) connecting the exhausts of the cylinders, valves (22,23) located in the exhausts of two of the cylinders (1,4) allowing exhaust gas therefrom to pass either through the respective exhaust duct or into the auxiliary duct, the engine being operable conventionally with valves 22,23 in position 22',23' or in an alternative manner wherein the intake valves (10,11) and the discharge valves (14,15) of the cylinders (2,3) are fixed to be closed and open respectively, the valves (22,23) in position 22'', 23'' so as to direct exhaust gas into the auxiliary duct, said exhaust gas acting expansively in the cylinders (2,3), the rotatable valves (26,27) being closed, and then being expelled from the cylinders (2,3) through the discharge ducts (6,7) the rotatable valves being open. The valves are driven at half crank shaft speed. <IMAGE>
Patent GB-2041667-A (GB)
Title: Electrical connection box
IPC: H02G3/08
Filed: 1980-01-17
Abstract: An electrical connection box has at least two apertures 12, optionally blanked-off by a removable web of material 11, in the sidewalls 9 thereof for receiving a conduit or armoured cable, and an assembly of nuts 15 removably located relative to the box and interconnected by means of connecting members 16 secured thereto, there being provided one nut 15 for co-operation with each aperture 12. The box may have a channel 13 for maintaining each nut 15 in an operative position relative to its associated aperture 12. The nuts 15 may be engaged with electrical conduits, or with cable glands when armoured cables are to be connected. <IMAGE>
Patent GB-2041063-A (GB)
Title: Clamp frame for screw clamp connector and method of making the same
IPC: F16B2/06
Filed: 1980-01-28
Abstract: A bush 20 threaded at 19 to receive a clamping screw is formed at one end of a metal strip 11 and an aperture 22 adapted to accommodate the bush at the other. The metal strip 11 is folded into a frame and the bush is upset or riveted at 23 to secure the two end sections 15A and 15B together. The elasticity of this clamp frame 10 compensates for an unloosening of the clamping screw. <IMAGE>
Patent GB-2044596-A (GB)
Title: Method and apparatus for expanding tobacco
IPC: A24B3/18
Filed: 1980-02-12
Abstract: Tobacco containing solid carbon dioxide is fed into an expansion chamber (14) in which it is expanded by hot gas; the solid carbon dioxide thereby being sublimed and moisture and organic material in the tobacco being volatalised. The gas and expanded tobacco enter a separator (15) from which the tobacco is discharged through a rotary valve (17). Gas is withdrawn from the separator (15), a portion of it vented, and the remainder heated by heater (27) and then returned to the expansion chamber (14). In order substantially to preclude air flowing through the rotary valve (17) into the separator (15) the pressures below and above the rotary valve are equalised. Alternatively, some of the gas withdrawn from the chamber (15) my be used to isolate the valve (17) from the atmosphere. By precluding air flow into the separator (15) the tobacco may be expanded without using steam (other than that evolved from the tobacco) or excessive temperatures.
Patent GB-2049663-A (GB)
Title: Novel benzoin ethers and their use as photosensitizers
IPC: C07C239/00
Filed: 1980-02-22
Abstract: Compounds of the formula I,   <IMAGE> wherein Ar is phenyl or phenyl which is substituted by halogen, C1-C4alkyl or C1-C4alkoxy, R<1> is hydrogen, C1-C4alkyl, benzyl or allyl, R<2> is one of the groups -CO-R<3>, -CO-O-R<3>, -CO-NH-R<3>, -CO-N(R<4>)2 or -SO-R<3>, while <3> is C1-C12alkyl, C2-C12alkenyl, C7-C6phenylalkyl or C5-C7cycloalkyl, or has one of the meanings assigned to Ar, and R<4> is C1-C4alkyl, are suitable for use as sensitizers for the photopolymerisation of unsaturated compounds and for the photochemical crosslinking of polyolefins. They are distinguished in particular by an excellent resistance to yellowing of the polymers. These compounds are obtained by reaction of the corresponding benzoins with formaldehyde and subsequent acylation of the benzoin- hydroxymethyl ethers by conventional methods.
Patent GB-2045760-A (GB)
Title: Process for the preparation of 2,5- bis(2,2,2-trifluoroethoxy)-N-(2-piperidylmethyl) benzamide (flecainide)
IPC: C07C51/29
Filed: 1980-03-18
Abstract: A process for preparing flecainide comprises reacting para-dibromo- benzene or para-dihydroxybenzene with a compound of formula CF3CH2O- A wherein A is -SO2CF3 or an alkali metal, acetylating the resulting 1,4- bis(trifluoroethoxy) benzene to give the bis (trifluoroethoxy) acetophenone in the presence of a Lewis acid catalyst, then either chlorinating the acetylated product, adding a buffering base and further chlorinating to form the corresponding  alpha , alpha , alpha -trichloroacetophenone or reacting the acetylated acetophenone with hypochlorite to form the corresponding benzoic acid and reacting the acid with an inorganic acid chloride to provide the corresponding acid chloride, and then reacting the product of either of the latter pair of steps with 2-amino-methyl-piperidine to form the flecainide product in one step or with two 2-amino-methyl- pyridine followed by reduction to form the flecainide product in two steps. Individual reaction steps in the above scheme are presented as being novel per se, as are some of the intermediate compounds formed.
Patent GB-2046747-A (GB)
Title: 2-mercaptopyridine derivatives and their use in the recovery of metal concentrates
IPC: B03D1/012
Filed: 1979-07-24
Abstract: New compounds of the general formula:   <IMAGE> where R is an alkyl or cycoalkyl group, are useful in flotation processes for the recovery of metal concentrates from metal-bearing mineral ores.
Patent GB-2048373-A (GB)
Title: A fuel injection pump for an internal combustion engine
IPC: F02M41/12
Filed: 1980-04-02
Abstract: A fuel injection pump for an internal combustion engine having a pump piston (8) received in a bore (10) and reciprocally and rotatably driven by cam drive means (3). A working chamber (11) is defined between an end of the bore (10) and an end of the pump piston (8). In order to stop the engine or to achieve quiet running a passage (16) is connectible with the working chamber (11) by means of an electro- magnetically operated valve (17). The passage leads to a suction chamber (25) of the injection pump. Alternatively to achieve quiet running the passage (16) communicates with an accumulator. <IMAGE>
Patent GB-2046266-A (GB)
Title: Process for the production of nonadecane diols
IPC: C07C29/16
Filed: 1980-04-03
Abstract: A process for the production of a mixture of nonadecane diols from oleyl alcohol under the conditions of oxosynthesis, in which oleyl alcohol, hydrogen and carbon monoxide are reacted together at 110 to 200 DEG C under a pressure of from 100 to 400 bars in the presence of a rhodium catalyst and a tertiary amine.
Patent GB-2053758-A (GB)
Title: Consolidating scrap
IPC: B30B9/32
Filed: 1980-05-21
Abstract: A scrap metal processing apparatus for compressing and then shearing a charge of scrap metal into compact portions has a relatively small plan area to permit its transportation. A movable platen (13) receives the charge and is swung from a horizontal to a vertical position (14) by rams (15) to crush the scrap against a fixed upright wall (12). A horizontally reciprocal shear (17) at the base of the wall is then gravity-fed with the compressed charge, sheared-off portions of which discharge onto a ramp (18). The apparatus is mounted on a chassis supported by hydraulic legs (11), optionally replaceable by road wheels. <IMAGE>
Patent GB-2061327-A (GB)
Title: A needle control and selection mechanism for a knitting
IPC: D04B15/68
Filed: 1980-09-09
Abstract: Needles 12 in a flat bed knitting machine each have a respective jack 13 having a combined selection and expulsion (or rejection) butt 21 cooperative with selection cam arrangements, each of which comprises a pair of cam parts 23a and 23b which are of substantially- identical mirror image configuration relative to one another and of which the upstream one (23a in Fig. 3) serves by its surface 25 to pivot the jacks 13 into dispositions in which ends 22 thereof are brought into the range of influence of electromagnetic selection members 17 and the downstream one (23b) serves by its face 24 to bring into operation selected jacks which are repelled by the members 17. <IMAGE>
Patent GB-2058598-A (GB)
Title: Slurry storage method and apparatus
IPC: A01C3/02
Filed: 1980-09-22
Abstract: A farm slurry installation comprises a conventional tank (4) adjacent which is positioned a support pillar (37). A jib (24) comprising an arm (25) and down pipe (27) is mounted on the pillar and is movable from the use position shown in solid lines to the raised position shown in broken lines. In use, when slurry is added to the tank from an associated reception pit it is pumped through arm (25) and down pipe (27) to a nozzle (28) through which it is emitted as a radial jet. The down pipe (27) is slowly rotated by motor (31) to cause the jet to sweep around the tank wall and break up any sediment or top crust. <IMAGE>
Patent GB-2090390-A (GB)
Title: A process and apparatus for drying coiled yarns
IPC: F26B15/12
Filed: 1981-01-09
Abstract: Yarn drying apparatus 10 comprises a delivery chamber 14 for the drying air, an outlet chamber 16 for the drying air, and a hank chamber 12, in which the yarns are moving. The air delivery and outlet chambers are in communication with each other only through the hank chamber, and the delivery and outlet chambers are also arranged so as to extend substantially along the hank movement path. The air delivery chamber is arranged at the top and the air outlet chamber is located at the bottom. <IMAGE>
Patent GB-2072590-A (GB)
Title: Crown reinforcements
IPC: B60C9/18
Filed: 1981-02-20
Abstract: A pneumatic tire has a crown reinforcement consisting of a main belt 24 which is formed of two or more plies 24a,b,c with cords at less than 30 DEG  to the equatorial plane E and which has an overall width Wa approximately equal to the tread with Wt, a ply 26 with cords at less than 30 DEG  to the plane E which is located between the tire carcass 20 and the main belt 24 and which has a width Wr of 40-60% Wa, and a ply 28 with cords at more than 45 DEG  to the plane E which is superposed on the main belt 24 and which has a width Wc of 40-90% Wa, the cord fabric of the ply 28 as a whole having a modulus of elasticity less than that of the cord fabric of the ply 26. The modulus of the cords per se of the ply 28 may be smaller than that of the cords of all the remaining plies and/or the "void ratios" (as defined in the specification) of the ply 28 as a whole and its cords per se may be greater than in the remaining plies. <IMAGE>