baber/WOPTO huggingface dataset:
Patent GB-1553986-A (GB)
Title: Perylene-3,4,9,10-tetracarboxylic acid diimide pigments their manufacture and their use
IPC: C09D11/02
Filed: 1976-10-08
Abstract: Perylene-3,4,9,10-dicarboximide pigments of the formula I <IMAGE>  in which both X represent a radical of the formula <IMAGE> or <IMAGE> are prepared. The pigments have a specific surface area according to BET of 5 to 35 m<2>/g, a maximum in the particle size distribution between 0.1 and 1  mu m in length and 0.1 to 0.4  mu m in breadth, the ratio of length to breadth on average being 4 : 1 to 1 : 1 and the amount of the particle sizes in the total distribution being at least 50%. Crude diimide of the formula I, whose primary particles have a size between 0.05 and 0.1  mu m to at least 60 to 70% and which form agglomerates of 0.1 to 100  mu m, is recrystallised here in organic liquids, in the presence or absence of water, at temperatures between 50 and 200 DEG C, until at least 50% of the particles have a size of 0.1 to 1  mu m.
Patent GB-1193824-A (GB)
Title: Improvements in or relating to Variable Attenuator Circuits
Inventor: TERRY MICHAEL TREACHER
IPC: H03G7/06
Filed: 1966-09-20
Abstract: 1,193,824. Automatic volume control. ELECTRIC & MUSICAL INDUSTRIES Ltd. 20 Sept., 1967 [20 Sept., 1966], No. 61922/66. Heading H4R. Variable attenuator comprises a number of resistive potentiometers connected in cascade in which the shunt component of each potentiometer is connected in series with a switch operated by a control signal, the switches being arranged to be operated in succession by a change in control signal so that the attenuation of the attenuator is progressively changed. In the limiter/compressor of Fig. 2 a balanced input signal applied to terminals 40, 41 is applied via long tailed pair 42 and emitter followers 51 and 52 to the balanced ladder attenuator having stages 45, 46 ... 50. Each stage comprises a series resistor 58 and a shunt resistor in series with the emitter collector path of a respective transistor. The emitters of the transistors are biased by the D.C. potentials appearing across the resistors 58, due to the current flow from transistors 59 and 60, so that the transistors are rendered conductive successively, stage by stage, as the potential applied to the control line 53 increases. The output from the attenuator is applied to a long tailed pair 61 from which the final output is derived via emitter follower 63. The control signal is derived either from the output of the attenuator, if the arrangement is to act as a volume compressor, or from the input to the attenuator if the arrangement is to produce a constant volume output. The appropriate signal is applied via switch 72, two complementary pair amplifier stages 73 and 74, and a phase splitting stage 75 to a full wave rectifier circuit 76. The resulting D.C. is fed via emitter follower 78 to a variable time constant circuit 80 by which the decay time of the control signal may be varied. The resulting control signal is applied via a Darlington amplifier 82 to the control line 53. A second Darling- ton amplifier 83 is provided which may be fed from a similar compressor circuit in the other channel of a stereo system to allow compression to be controlled by the channel carrying the larger signal. Similarly the control signal may be fed to a similar circuit for the other channel via terminal 85. Emitter follower 86 provides a limit on the negative excursion of the control voltage and therefore limiting the minimum attenuation of the circuit, or the point at which compression or limiting starts. Diodes 54 are connected between the bases of the attenuator stage transistors and the collectors of the transistors two stages before in order to limit reverse base to emitter voltage in the transistors, preventing breakdown and noise.
Patent GB-1277340-A (GB)
Title: High voltage selenium rectifier
IPC: H01L21/105
Filed: 1970-09-02
Abstract: 1277340 Selenium rectifiers INTERNATIONAL STANDARD ELECTRIC CORP 2 Sept 1970 [11 Sept 1969] 41990/70 Heading H1K In a high voltage series multi-unit selenium rectifier, e.g. for the beam voltage of a television C.R. tube, accumulated capacitance voltage is discharged at switchoff through the reverse resistance of the rectifier whose units have a gradually falling reverse current-voltage characteristic (Fig. 2, not shown) and thus a moderately constant ohmic reverse resistance (Fig. 3, not shown). This is obtained by admixing elements, e.g. zinc of the 2nd group of the Periodic Table, to the selenium layer, preferably at the boundary between the selenium and the forming cadmium selenide, the selenium being evaporated slowly on to the base-plate in amorphous form and thereafter thermally converted to the conducting form. A preferred proportion of zinc is 0À01 to 0À1% by weight. A stack of plural such rectifiers may be series connected in an insulant tube.
Patent GB-1370281-A (GB)
Title: Flexible plastics hoses
IPC: B29C48/49
Filed: 1971-09-02
Abstract: 1370281 Extruded reinforced tube CREATORS Ltd 2 Sept 1971 [2 Sept 1970] 42030/70 Addition to 1281682 Heading B5A [Also in Division F2] A thermoplastic or elastomeric tube extruded from an annular die outlet comprise a wall of a first material, e.g. soft polyvinyl chloride, reinforced by partially or completely embedded and simultaneously extruded rings or circumferentially extending ribs of more rigid or stronger material, e.g. rigid polyvinylchloride, which have been incorporated into the first material upstream of the extrusion outlet. In the Fig. 1 embodiment, the first material is supplied by a first screw extruder to the extrusion passage 2, via a tangential inlet to an annular chamber 6 and a passage 4, and the second material is supplied from a second screw extruder, via a similar inlet 5a and chamber 5, and the annular outlet of a passage 3, the discharge from which is intermittently partially, or completely, obturated by a reciprocated sleeve 23. Intermittent complete obturation produces axially separated circumferential rings, Fig. 6 (not shown), of the second material embedded within the first material, and the rings may be of circular or elliptical section in the axial plane. Partial obduration produces circumferential ribs of the second material interconnected axially by circumferentially continuous webs thereof. Alternatively, the obdurating end of the sleeve 23 may be castellated to produce the reinforcement as an interconnected mesh of circumferentially and axially extending webs 53, 54, Fig. 7. The second material flows to the annular outlet of the passage 3 through the passages of a spider 21 supporting an inner die member 9 which, immediately at the outlet of passage 3, may be provided with a lip (not shown) to deflect the second material fully within the first material. An outer die member 10 defining the passage 2, is radially adjustable by screws 10a. In the Fig. 8 modification of the Fig. 1 embodiment, the sleeve acts to obdurate the passageway 4 from which the second material is discharged, with the first material being continuously discharged internally thereof from the passage 3. A reinforcement of the second material on the surface of the first material, may be completely embedded by a second layer of the first material extruded from a further passage in the die. The sleeve 23 of the Figs. 1 and 8 embodiment, is connected for its reciprocatory movement to a yoke 33, via yoke and sleeve flanges 35, 36 locating in grooves 39, 40 of a plurality of axially slidable bolts 37, the yoke 33 being pivotally mounted between a pair of arms 31 pivoted at 32 about the die at one end for reciprocatory displacement at their other ends by an eccentric (not shown). The extruded tube is drawn from the die by a traction device and cooled. The dies are electrically heated.
Patent GB-1150914-A (GB)
Title: Improvements in Fragmentation Projectiles
IPC: F42B12/22
Filed: 1966-09-21
Abstract: 1,150,914. Fragmentation projectiles. COMPAGNIE FRANCAISE THOMSON HOUSTON-HOTCHKISS BRANDT. 21 Sept., 1966 [8 Oct., 1965], No. 42227/66. Heading F3A. Fragmentation projectile, e.g. anti-aircraft missile, comprises an explosive charge 62 contained within a metal or plastics casing (represented by the criss-cross lines) and on which casing are held juxta-posed, pre-shaped, metal fragments (not shown) of simple geometrical shape, e.g. paralellepiped, the sizes of the fragments increasing along the axis of the projectile from the front to the rear. Fragments of equal size can be arranged together in areas over the casing. The explosive charge 62, which may be barrel-shaped, is exploded at its centre when the target enters a conical radiation pattern beamed forwardly of the projectile by a proximity fuze. The largest fragments are projected rearwardly in the area 1 whilst the smallest fragments are projected forwardly in the area 3. Intermediate sized fragments are projected in the area 2.
Patent GB-954066-A (GB)
Title: Improvements relating to heat exchangers
Inventor: DICKSON RONALD
IPC: F28F3/02
Filed: 1960-12-08
Abstract: 954,066. Brazing. MARSTON EXCELSIOR Ltd. Dec. 8, 1961 [Dec. 8, 1960], No. 42295/60. Heading B3R. [Also in Division F4] In a heat exchanger consisting of a stack of heat exchange plates or tubes 1, 2, 3 and corrugated spacer elements 8, 9 (see Division F4), sheets of brazing foil (not shown) are interposed between the elements 8, 9 and between these and the plates or tubes 1, 2, 3. The assembly is then dipped in a bath of hot flux to melt the foil and braze the whole together at the points of contact.
Patent GB-992797-A (GB)
Title: Improvements in or relating to 6,7-seco-morphinan-6,7-dioic acid derivatives and their preparation
Filed: 1963-04-04
Abstract: The invention comprises compounds of formula <FORM:0992797/C2/1> wherein R and R11 represent alkyl groups of 1 to 5 carbon atoms and R1 represents a hydrogen atom or an aryloxy group, and the preparation thereof by reacting a compound of the formula <FORM:0992797/C2/2> with hydrogen peroxide in an inert organic solvent medium.  The process is preferably carried out under reflux. (-) - 3 - Methoxy - 6,7 - dioxo - N - methylmorphinan (cis) is prepared from (-)-3-methoxy - 4 - hydroxy - 6,7 - dioxo - N - methylmorphenan (cis) by conversion to the bis-ethylene ketal and etherification to give the 4-phenyloxy derivative followed by removal of the 4-phenyloxy group to give (-)-3-methoxy-6,7 - diethyleneoxy - N - methylmorphinan which is dekatalated.  (-) - 3 - Methoxy - 4 - phenyloxy - 6,7 - dioxo-N-methylmorphinan (cis) is prepared from (-) - 3 - methoxy - 4 - phenyloxy - 6,7 - diethyleneoxy - N - methylmorphinan (cis) described above.
Patent GB-1181262-A (GB)
Title: Inductive Electric Apparatus
Inventor: GREATHEAD THOMAS WILLIAM
IPC: H01F27/38
Filed: 1967-09-20
Abstract: 1,181,262. Voltage stabilizers. ADVANCE ELECTRONICS Ltd. Sept.20, 1967, No.42844/67. Addition to 1, 096, 622. Heading G3X. An A.C. voltage stabilizing arrangement comprises:- a transformer 1 having a core 4 which in operation is unsaturated, a primary winding 2 and a secondary winding 6; output terminals 7 connected directly to the winding 6; a circuit including a linear inductor 9 and a saturable inductor 8 connected across the winding 6, this circuit operating as described in Specification 1, 096, 622 so that the output voltage at terminals 7 is stabilized against input voltage variations; and a further circuit arranged to reduce the proportion of harmonics of the supply frequency present in the output voltage. As shown the further circuit comprises a first series combination of a capacitor 10 and an inductor 11 tuned to one harmonic, e.g. the third, and a second series combination 12, 13 tuned to another harmonic, e.g. the fifth. In a second embodiment Fig.2 (not shown) a compound inductor is associated with the secondary winding 6, the compound inductor having a first winding associated with a core portion which is saturated in operation and a harmonic-compensating second winding on a core portion which less readily saturable, the second winding being connected in series with a capacitor across the secondary winding 6.
Patent GB-1163023-A (GB)
Title: Encapsulation of Particulate Materials and Liquids
IPC: B01J13/08
Filed: 1966-09-26
Abstract: 1,163,023. Micro-capsules. GUNTHER WAGNER PELIKAN-WERKE. 26 Sept., 1966 [30 Sept., 1965], No. 42858/66. Heading B8C. A process of forming micro-capsules, stated to be an alternative to coacervation or polycondensation involves dispersing the substance to be encapsulated in a liquid medium with the addition of two film-forming components, one selected from the group consisting of metal alginate, metal carrageenate, metal carboxymethylcellulose, cellulose xanthogenate, unsaturated polyester and cellulose ester, and the other being a low molecular substance selected from the group consisting of metal salts having a multi-valent cation, organic acids, mineral acids, organic peroxides and O-titanic acid ester. Examples are as follows: To encapsulate tributylphosphate, ferric chloride is dissolved in it to form a 5-10% solution which is mixed with a 0À2-2% aqueous solution of ammonium alginate. Encapsulated droplets separate out which are washed in water to remove ammonium chloride and also excess ferric chloride by diffusion through the alginate film. To encapsulate clay particles, cadmium chloride solution is adsorbed on to the latter which are then suspended in a 0À1-1% aqueous sodium algenate solution. A film forms on the particles. Glycerine is encapsulated by dissolving cobalt naphthenate in a 70% solution of an unsaturated polyester resin in styrene. The solution is heated to 80‹ C. and glycerine containing methylethylketone peroxide is dispersed in it. The glycerine droplets thus are encapsulated in a polyester resin film. The process is suitable for encapsulating dyestuff solutions, pigments and solids for pharmaceutical or chemical purposes.
Patent GB-1243865-A (GB)
Title: Means for the conversion of a decimal number in bcd form into a pure binary number
IPC: G01P3/02
Filed: 1969-08-29
Abstract: 1,243,865. Decimal-to-binary converters. MESSERSCHMITT - BOLKOW - BLOHM G.m.b.H. 29 Aug.. 1969. [5 Sept.. 1968], No. 43207/69. Heading G4A. A BCD-to-pure-binary converter comprises a number of binary full adders, each (except the last) feeding sum and carry signals to the next, and each BCD input line (except the least significant) going to all the adder inputs associated with those powers of two which added together give the value of the input line. As disclosed, six 4-bit parallel binary adders are used for three decimal orders, each except the last feeding three sum bits and a carry bit to the next and providing one bit of the final binary output. The last adder provides four bits of the output.
Patent GB-1408896-A (GB)
Title: Sewage treatment
IPC: C02F3/18
Filed: 1972-09-19
Abstract: 1408896 Aerobic sewage treatment G W SMITH 19 Sept 1972 43374/72 Heading C1C [Also in Division B1] In a method and apparatus for purification of sewage by the activated sludge process, an aeration tank 31 has a submerged horizontal baffle 33 defining upper and lower flow paths 31a, 31b. The mixture of sewage and returned sludge is circulated round the baffle as by surface aerators 34 comprising rotatable perforated discs 3'6: The tank discharges over a weir 38. In modifications the sewage is additionally or alternatively circulated and aerated by jets of mixed air and returned sludge (42, Fig. 4, not shown) in the lower flow path 31b; the surface aerators may be elliptical discs (36<SP>1</SP>, Fig. 4), perforated drums (36<SP>11</SP>, Fig. 5, not shown) or brushes (36<SP>111</SP>, Fig. 6, not shown) and there may be a plurality of horizontal flow paths and baffles (Fig. 6). The baffles are preferably corrugated and may be of metal or synthetic resin.
Patent GB-1164643-A (GB)
Title: Draw Gear Using a Hydraulic Spring
Inventor: BITTEL KARL
IPC: F16F5/00
Filed: 1966-09-28
Abstract: 1,164,643. Railway vehicle draw gear. ZENTRALE ENTWICKLUNG UND KONSTRUKTION ZEK HYDRAULIK VEB. 28 Sept., 1966, No. 43407/66. Heading B7T. During slow compression a draw gear yoke or cradle 1, Figs. 1 and 2, moves a follower 2 to the left and forces a plunger 14 into a liquid cylinder 5 abutted against fixed stops 4. An auxiliary plunger 12, containing a plunger 23, piston 24 and liquid under very high pressure,- is provided with a piston 13 having spring loaded valves 21 and valves 18 fixed to a spring loaded plate 19, so that as the plunger 14 moves into the cylinder 5 the chamber 28, due to differential piston areas, has a pressure generated in it which is higher than the pressure in chamber 29 so that the valves 21 remain closed and the valves 18 open, the plunger 12 being moved out of cylinder 5 and to the left. The plunger 23 also moves out with the plunger 12 and keeps contact with the cradle 1, the plunger 12 finally abutting a stop 32. As the compression takes place the spring characteristics vary, the slight difference in cross-section between plungers 12 and 14 producing an initial very flat rate of spring rise until the piston 13 comes to abut the stop 32 when the rate rises steeply. If, however, dynamic compression is effected then the spring rate rises steeply from the beginning. The piston 13 may also have a throttle gap similar to that of piston 15, or the opening of the valves 18 may be delayed by a heavier spring 20 to further vary the spring characteristic. In a further modification the plunger 12 may be made slightly conical. During traction, the plunger 14 is held stationary by the stop plate 2 and movement of the housing 5 under pull on the yoke 1 is resisted by the pressure in chamber 29. The plunger 23 is in contact with the yoke 1 and is moved with it but the plunger 12 is moved outwardly by the increasing pressure in chamber 29 until it abuts the yoke 1. When the pressure in 28 reaches a certain valve the valves 18 open so that when piston 13 abuts the stop 32 the pressure in 29 rises so that valves 18 close and valves 21 open. The main plunger 14 then acts upon the liquid in chambers 28, 29. The liquid spring in the piston 12 being at very high pressure compensates for the changes in volume or pressure produced by the influence of temperature in chambers 28, 29, 30, since the substantially constant force of the plunger 23, which is little effected by temperature, presses the plunger 12 inwardly with the same force to produce constant pressure in 28, 29 or 30.
Patent GB-1482809-A (GB)
Title: Arrangement for adjusting the damping force of a shock absorber
IPC: F16F9/348
Filed: 1974-10-08
Abstract: 1482809 Valves; shock absorbers with adjustable damping ITT INDUSTRIES Inc 8 Oct 1974 [12 Oct 1973] 43473/74 Headings F2S and F2V  In an hydraulic or pneumatic piston-cylinder shock absorber of the type where the resistance to flow afforded by a path 8 through the piston 2 is adjusted by engagement of a stop 26 on the cylinder 1 with an adjustment member 16 carried by the piston-rod 3 followed by relative rotation of the piston-rod and cylinder, the stop 26 is movable from an operative to an inoperative position to prevent accidental adjustment.  The stop may be biased to the inoperative retracted position by a spring (not shown) or by the gas pressure (if the shock absorber is pneumatic), and held in the operative projecting position against this bias during adjustment. Alternatively (as shown) it may be screwed in and out between the two positions. The piston has two resilient valve members 10 and 12. The member 10 has peripheral recesses (11, Fig. 4, not shown) which may provide a permanently open path across the piston, but can be more or less covered by a wide part of the member 12 to adjust the damping, on relative rotation of the members 10 and 12. The adjustment member 16 has a recess 27 for engagement with the stop 26 when projecting, and a finger 30 for engagement with a recess 31 in the valve member 12. To adjust the damping, the shock absorber is fully extended and the stop 26 is moved to its operative position. The piston-rod is rotated relative to the cylinder until the stop 26 engages the recess 27 in the adjustment member 16, locking the valve member 12 to the cylinder. Subsequent rotation of the piston-rod in either direction causes relative rotation of the valve members 10 and 12 to vary the area of the recesses (11) covered. The relative rotation is limited by stop surfaces (32, 33, Fig. 4) on the member 10 and indexed by a projection 28 on the adjustment member 16 which engages recesses 29 on a ring 18. The stop 26 may be at the other end of the cylinder, in which case the shock absorber is fully compressed in order to adjust it.
Patent GB-896331-A (GB)
Title: A process for aromatizing hydrocarbons
IPC: C07C5/41
Filed: 1960-12-19
Abstract: The dehydrocyclisation of a non-aromatic hydrocarbon or the non-aromatic portion of a partially aromatic hydrocarbon is effected in the presence of a catalytic amount of iodine.  The starting material is preferably an alkene or aryl alkene in which there is a chain of at least 4 carbon atoms, the total number of carbon atoms in the chain plus the number of quaternary carbon atoms in the chain is at least 6 and the longest chain contains no more than 5 contiguous quaternary carbon atoms, e.g. a C7-C18 alkene or aryl alkene in which the straight chain from which it is derived has at least two unsubstituted hydrogen atoms; specified are di-isobutylene which may be mixed with butylenes and which yields p-xylene, diphenyl hexenes such as 2-phenylpropene dimer (2,4 - diphenyl - 4 - methylpentene-1) which yields terphenyl, monophenylhexenes which yield biphenyl, 3,3-dimethylpentene and 2,2,5-trimethylhexene.  At lower temperatures the olefin is also hydrogenated and isomerised and at higher temperatures hydrogenated and cracked, e.g. di isobutylene may give iso-octane or isobutane.  If preferred a hydrogen acceptor such as a C2-C5 olefin may be added.  The amount of iodine may be 0.5-2.5% mol of iodine based on olefin and is added as the element or alkyl iodide; it appears in the product as alkyl iodide and is recycled as such.  Other conditions are 400 DEG C.-550 DEG C., 0.5 kg./cm.2 absolute-17.5 kg./cm.2 gauge and 15 seconds-10 minutes.  The reaction may be effected in tubular coils in a conventional furnace. Specification 793,135 is referred to.