baber/WOPTO huggingface dataset:
Patent GB-1287989-A (GB)
IPC: H02H7/122
Filed: 1970-11-09
Abstract: 1287989 Converters TOKYO SHIBAURA ELECTRIC CO Ltd 9 Nov 1970 [10 Nov 1969 8 June 1970] 53268/70 Heading H2F In an inverter circuit containing at least two series connected thyristors, the current through the thyristors is monitored; if current is detected simultaneously in both thyristors the inverter is isolated from the D.C. input for a predetermined period. D.C. power is fed to a poly.phase inverter circuit 10 having thyristors 16, 17, 18, 19, 20 and 21 via main switch 30, thyristor chopper 31, D.C. current transformer 32, and smoothing choke 33. The current flowing in each thyristor is detected by means of transformers 36 to 41. If a pulse due to current flowing through one thyristor coincides with the control pulse applied to the other thyristor of the bridge arm an output pulse is produced from one of AND gates 42 to 47. This pulse passes through OR gate 49 to switch off chopper 31 for a period determined by monostable 49. In a second embodiment, Fig. 4, each thyristor has a resistance 75 to 79 in series with it and a transistor 81, 82 &c. connected to it. If both the thyristors carry current, transistors 81 and 82 are both conducting, and this causes transformer 63 to saturate, thus interrupting the transmisssion of pulses from generator 59. This causes the chopper to switch off the D.C. supply. In another embodiment the resistor and transistors are replaced by diodes. In a further embodiment, such an inverter is supplied with D.C. from a reversible rectifier fed with A.C. If two thyristors in the inverter conduct the rectifier is switched to function as an inverter and pump any power in the main inverter back into the A.C. supply.
Patent GB-1199295-A (GB)
Title: Improvements in or relating to Variable Diameter V-Belt Pulley Assemblies
IPC: F16H61/662
Filed: 1967-11-24
Abstract: 1,199,295. Expanding-pulley gear. ERNST HEINKEL A.G. 24 Nov., 1967 [14 Dec., 1966], No. 53474/67. Heading F2D. In an expanding pulley gear in which an axially fixed flange 2 fast on a shaft 1 carries rods 4 to guide an axially movable flange 3 having an extension 9 carrying in a bearing 8, a pressure ring 7 engaged by an adjusting cup 16, or forked lever (22) (Fig. 3, not shown) axially moved for ratio adjustment by a hand wheel 14 and screw 13, the pressure ring 7 and cup 16 are formed with interengaging spaced lugs 10, 11 and 17, 18, 19 to prevent uncontrolled relative rotation therebetween and consequent wear and noise. In Fig. 3 (not shown) the lugs 11 on the pressure ring directly contact the lever fork ends (21). In Figs. 4 and 5 (not shown) the shifting device comprises a spigot (24) on the end of an adjusting pin (23) engaging a socket (25) in the pressure ring whilst in Figs. 6 and 7 (not shown) the pin (23) directly contacts the lugs 11 on the pressure ring. A lever 15 serves to lock any ratio setting.
Patent GB-1300709-A (GB)
Title: A mop
Inventor: FAI ANDREW TSANG NG
IPC: A47L13/14
Filed: 1971-11-19
Abstract: 1300709 Mop A TSANG NG FAI 19 Nov 1971 53809/71 Heading A4F A mop comprises a cover 5 slidable along the handle 1 so as to engage the mop head, the cover decreasing in cross-section away from the mop head and being provided with spiral flutes so that the mop head may be compressed and wrung by the cover. The cover has a handle 6. The mop head may be detachably secured to the handle as shown in Fig. 5. The mop head is engaged by a loop 13 connecting the two halves 12a, 12b of a split sleeve. Each half of the split sleeve has a lug 11 for engaging a hole 10 in the end of the handle, and a threaded member 14 is provided to secure the sleeve in position on the handle. (For figures see next page)
Patent GB-1387460-A (GB)
Title: Production of 6-aminopenicillanic acid
IPC: C12P37/06
Filed: 1972-11-22
Abstract: 1387460 Producing 6-aminopenicillanic acid BAYER AG 22 Nov 1972 [23 Nov 1971] 53891/72 Heading C2C 6-Aminopenicillanic acid is produced by N-deacylating penicillin G in aqueous solution at pH 6 to 8 and 20 to 50 C. with a penicillin acylase bound covalently to a solid carrier which is the anhydride form of a copolymer of acrylamide, N,N<SP>1</SP>-methylene-bis-acrylamide and maleic acid. The 6-aminopenicillanic acid produced may be isolated by bringing the reaction solution to its iso-electric point (pH 4À3) to precipitate the product.
Patent GB-1496495-A (GB)
Title: Processing circuit for television chromatic signals
IPC: H04N9/465
Filed: 1974-12-17
Abstract: 1496495 Colour television receivers INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA SpA 17 Dec 1974 [19 Dec 1973 9 April 1974] 54345/74 Heading H4F A PAL colour television receiver has a switching voltage generator operating at half line frequency and controlled in phase by the output of a phase comparator. The comparator receives a reference burst extracted from the received PAL signal for comparison with a locally-generated sub-carrier. The sub-carrier generator is excited by alternate reference bursts which are passed to it via a gate controlled by the switching voltage generator. The switching voltage controls the phase of the subcarrier signal fed to a synchronous demodulator in known manner. In one embodiment, Fig. 1, the chrominance signal 1 quadrature-modulated on a sub-carrier is passed to a.g.c. 2 and gate 8. Gate 8 is enabled at line frequency by input 9 to pass the reference burst to gate 11 and phase comparator 16, e.g. a synchronous demodulator. Gate 11 is enabled at half line frequency by the output of switching voltage generator 10 and passes alternate bursts to sub-carrier regenerator 12, e.g. a crystal filter. The continuous sub-carrier from regenerator 12 passes via 90 degree phase shifter 13 to comparator 16. Units 17, 18, e.g. a gate and a low pass filter, receive the comparator output and provide pulses at half line frequency if the inputs to the comparator are out of phase. The pulses are passed to a frequency selective circuit 19 whose output changes the phase of switch 10 as necessary, switch 10 being switched at line frequency by input 9 to provide the half line frequency switching signal. The sub-carrier from unit 12 controls a.g.c. 2 and colour killer 3 via, for example, an amplitude detector, and also passes to 45 degree phase shifter 14. The output of shifter 14 is additionally shifted by 90 degrees and applied to demodulator 5 to provide the B - Ysignal. It is also passed direct and via inverter 22 to switch 23 which is controlled by the switching voltage from unit 10 to apply the subcarrier with the required phase to demodulator 4 which provides the R - Y signal. Modifications of Fig. 1 involve the removal of units 17 and 19 or of 17 and 18, the use of a second phase comparator receiving the outputs of units 19 and 10 to synchronize unit 10, or the replacement of unit 19 by a pulse generator. Further, gate 11  may be replaced by a switch directing the reference bursts alternately to units 12 and 16. A second embodiment (Fig. 3, not shown) is generally similar to that of Fig. I but there is no phase shifter between units 12 and 16, the required phase shift being introduced between units 8 and 16. Further, the comparator output passes to switch 10 only via a diode (31). The phase shifter (30) may alternatively follow units 8 or 11.
Patent GB-1184590-A (GB)
Title: Improvements in or relating to Vacuum Electric Switches.
Inventor: LUDLOW JOHN HEYWOOD
IPC: H01H33/662
Filed: 1967-11-29
Abstract: 1,184,590. Vacuum switches. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 20 Nov., 1968 [29 Nov., 1967], No. 54368/67. Heading H1N. A tubular shield which surrounds the contacts of a vacuum switch has an outwardly extending central flange gripped between flanges of two envelope parts which are joined at their flanges. As shown, the shield 35 is formed of two identical parts 35A, 35B welded together at flanges 37 and retained with the flanges 37 gripped between the welded together flanges 7A and 9A of annular members 7 and 9 joined to respective glass envelope parts 3 and 5. The envelope is closed by end plates 15, 21 on which the fixed and movable contacts 25, 27 are mounted, the former being mounted on a support 17 provided with holes 33 for evacuation of the envelope during manufacture. In Fig. 2 (not shown), the flanges 37 are shaped to fit the contours of the envelope flanges so as to provide additional space in the envelope near the contact making surfaces which have a larger area than those of the Fig. I arrangement.
Patent GB-1374346-A (GB)
Title: Pharmaceutically active isoxazolone derivatives
IPC: C07D413/06
Filed: 1972-11-24
Abstract: 1374346 Isoxazolone derivatives SANKYO CO Ltd 24 Nov 1972 54443/72 Heading C2C Novel isoxazolone derivatives of the formula wherein R<SP>1</SP> is H, halogen or alkyl, R<SP>2</SP> is H, alkyl, alkoxycarbonyl or aryl, or R<SP>1</SP> and R<SP>2</SP>, together with the carbon atoms to which they  are attached, represent a fused benzene ring with the isoxazoline ring and -NA) is an unsubstituted or substituted 5-7-membered saturated heterocyclic ring optionally containing further hetero atoms are prepared by 4-R<SP>1</SP>-5-R<SP>2</SP>- 2-haloformyl - 4 - isoxazolin - 3 - ones or 2- haloformylbenzisoxazolin-3-ones with the appropriate heterocyclic compounds or by reacting 4-R<SP>1</SP>-5-R<SP>2</SP>-3-hydroxyisoxazoles or 3-hydroxybenzisoxazoles with compounds of the formula wherein X is halogen. 2 - Chloroformyl - 4 - isoxazolin - 3 - one is obtained by reacting phosgene with 3-hydroxyisoxazole. Pharmaceutical compositions, suitable for oral or parenteral administration, contain the above novel compounds and pharmaceutical carriers or diluents. The compounds possess analgesic, anti-inflammatory, antitussive and anti-hypertensive activities.
Patent GB-1082510-A (GB)
Title: Epoxy-resin blends and traffic paints based thereon
Inventor: NEAL DENNIS
IPC: E01F9/08
Filed: 1965-12-23
Abstract: Epoxy resin compositions comprise (a) 10-30 wt. per cent of a solid glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane having a molecular weight of 700-4000 and a Durran's mercury method softening point of 60-160 DEG  C. and (b) 90-70 wt. per cent of an epoxy-containing reaction product of a dimerized octadecadienoic acid and at least 1.5 times the chemical equivalent amount of a glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane of molecular weight 340-500.  Traffic paint compositions comprise an epoxy resin composition as defined above, solvent and pigment wherein the volume ratio of resinous composition to solvent is 70:30 to 30:70 and the volume ratio of resinous composition to pigment is 40:60 to 60:40. The components of resinous composition may be reacted at 150-260 DEG C. before incorporation in the paint.  An epoxy-ester is prepared by reacting a diglycidyl ether of 2,2-bis(4-hydroxyphenyl)-propane and dimerized octadecadienoic acid in the presence of methyl diethanolamine at 120-150 DEG  C.
Patent GB-1356700-A (GB)
Title: Automatically controlling mole ratios
IPC: G06G7/75
Filed: 1971-11-25
Abstract: 1356700 Control of chemical composition TEXACO DEVELOPMENT CORP 25 Nov 1971 [14 Dec 1970] 54710/71 Heading G3R In the catalytic reforming of oil, or the hydrogenation of kerosine, light gas oil or lubricating oil, the mole ratio of hydrogen in the recirculating gas, to the hydrocarbon in the oil is computed on the basis of sensed parameters in the system, and maintained at a desired value to minimize coking of the catalyst, by controlling the speed of a compressor recirculating the gas. A signal means 24, see also Fig. 2 (not shown), contains meters (28), (29) measuring the boiling point and API gravity of the charge oil, whose outputs are processed in the unit 24, on the basis of disclosed algebraic equations relating the meter outputs to the average specific gravity and molecular weight of the oil, to provide signals E 2 , E 1  representing the latter quantities. Reference voltages (E a -E n ) fed to the unit represent co-efficients in algebraic analysis The signal E 2  is multiplied by signal E 14  representing oil flow rate, the resultant being divided in unit 81 by the signal E 1 , to provide an output E 16 , the denominator of an algebraic expression representing the mole ratio. Signal means 87, see also Fig. 3(not shown), contains a chromatograph (88) sensing the hydrogen, and specified hydrocarbon constituents of the recycled gas, and, on the basis of disclosed algebra, outputs a signal E 19  representing the percentage by volume of hydrogen, and a signal E 20  for the specific gravity of the gas. Such signals are multiplied in unit 102, and multiplied by a signal E 25  representing gas flow rate, to provide signal E 26 , the numerator of the mole ratio expression. E 26  is divided by E 16  in unit 110, and amplifier 112 having a gain equal to a co-efficient in the expression, outputs a signal equivalent to the actual mole ratio, which is subtracted in unit 116 from a predetermined desired value mole ratio signal E 9 , the difference signal establishing a setting of a speed controller influencing a steam flow recorder controller 125 pneumatically controlling the setting of a steam valve 130 providing steam to a turbine 20 driving recirculating gas compressor 17. Signal E 28  is an actual steam flow signal. A tachometer 120 feeds a turbine speed signal to controller 120, limiting the maximum allowable turbine speed. Clock 21, via switch 22, controls the operation of sample and hold units (34, 63 Fig. 2, 90-90H Fig. 3) in the units 24, 87. Computation may be analogue, or digital with a/d converters at the sensor locations, and a d/a converter at the speed controller input. Amplifier 112 may be replaced by a multiplier receiving a reference voltage representing the co-efficient in the mole ratio expression, and the output of divider 110. Alternatively, the mole ratio may be stabilized by controlling the oil flow to the catalytic reforming unit.
Patent GB-1454869-A (GB)
Title: Electrolytic cell
IPC: C25C3/14
Filed: 1974-12-19
Abstract: 1454869 Electrolytic cells COMALCO Ltd 19 Dec 1974 [20 Dec 1973] 54861/74 Heading C7B An electrolytic cell, e.g. of the Hall type for Al production, has a plurality of equal-sized rectangular anodes 16 depending downwardly into a rectangular cathode cavity 10, in two rows parallel to the long side of the cavity. The majority of the anodes have their short side parallel to the long side of the cavity while the remainder are conversely arranged whereby one or more spaces 18 are formed at selected locations for feeding e.g. alumina and tapping the product. The total anode area is at least 85% of the cavity cross-section. Prebaked or Soderberg anodes may be used.
Patent GB-1164498-A (GB)
Title: A Process for the Manufacture of Benzophenone Derivatives
IPC: A61K/
Filed: 1966-12-08
Abstract: 1,164,498. Benzophenone derivatives. F. HOFFMANN-LA ROCHE & CO. A.G. 8 Dec., 1966 [9 Dec., 1965], No. 54952/66. Heading C2C. Compounds of the general formula (R,R<SP>1</SP> = halogen, NO 2 , CF 3 , C 1-7  alkyl; R<SP>2</SP> = halogen; R<SP>3</SP> = C 1-7  alkyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)-(C 1-7  alkyl); broken lines denote optional substituents), are prepared by treating the corresponding ketone under anhydrous conditions with NH 3  under pressure and in the presence of BF 3 , TiCl 4 , AlCl 3 , FeCl 3 , ZnCl 2 , SbCl 3  or SnCl 4 .
Patent GB-1154378-A (GB)
Title: Conveyor Loaders
Inventor: MOTHERSHAW HAROLD GEORGE
IPC: B65G15/10
Filed: 1965-12-30
Abstract: 1,154,378. Endless conveyers. GEORGE ORTON SONS & SPOONER Ltd. 1 Dec., 1966 [30 Dec., 1965], No. 55187/65. Heading B8A. Articles are transferred between a roller conveyer 42 and a vertically moving conveyer 40 by means of an apparatus comprising a plurality of endless conveyer belts 19 arranged in a horizontal plane on each side of a base member 10 and driven by a common drive shaft 16 mounted on said member 10 wherein the conveyers 19 on one side of the base member are in interleaved relation with the conveyers on the other side. The idler pulleys 18 for the conveyers 19 at opposite ends of the apparatus are each mounted by a pair of plates 12 extending parallel to the respective conveyer, which plates are attached to the base member and are integral with the corresponding one on the opposite side of the base member. The base member is mounted on a framework 43, 46, 49 wherein by means of hydraulic jacks 51, 50 the apparatus may respectively be moved horizontally between positions adjacent the two conveyers 40, 42 and vertically. To transfer articles to or from an upwardly or downwardly respectively moving conveyer 40 the apparatus is arranged in a position whereby the fingers of the platform 41 of the conveyer 40 pass between the conveyers 19 and deposit or remove articles thereon. To load a downwardly moving platform the apparatus is raised and when the platform 41 is just below the conveyers 19 the apparatus is moved towards the conveyer 40 and then lowered at a rate greater than that of the platform to deposit the article thereon before being withdrawn. To remove an article from an upwardly moving conveyer the above method is reversed. Articles are held on the roller conveyer 42 by means of a stop (52), Fig. 5 (not shown) when the apparatus is adjacent the conveyer 40. The stop comprises a bell crank, one arm (53) of which is spring urged into the path of the articles and the other arm (55) is engageable by the apparatus when adjacent the roller conveyer to overcome the spring (57) and permit the discharge of the articles.
Patent GB-1456219-A (GB)
Title: Fan and apparatus including the same
IPC: F04D29/44
Filed: 1973-11-28
Abstract: 1456219 Centrifugal seperator G ZSOL DOS 28 Nov 1973 55227/73 Heading B2P [Also in Divisions E1, F1 and F2] The suction fan of a suction sweeper for roads has an involute casing wall 29 formed over its upper half in a region extending over a subtended angle of up to 180‹, typically 145‹, from the beginning of the involute in the direction A of impeller rotation with louvres 33 (or a single continuous opening). It is found that little or none of the debris entrained in the air drawn into the fan reaches this region. Air discharged through the louvres 33 to atmosphere is therefore substantially debris-free. An outer wall 30 may be provided, the air discharged through the louvres 33 then passing to atmosphere via a filter (not shown) in the lower half of the space between the walls 29, 30, whereby any remaining debris is removed. The remainder of the air, containing substantially all of the debris, but amounting typically to only 30 to 35% of the air entering the 'fan is discharged at 102 to a storage bag. The debris entering the fan is comminuted to some extent by cutting edges 73 on the impeller blades 25.
Patent GB-1183930-A (GB)
Title: Circuit Arrangement in a Calculating Machine for Producing Selection Timing Pulses for the Bit Extraction from a Cyclic Store
IPC: G06F3/00
Filed: 1967-12-06
Abstract: 1,183,930. Delay line store. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 6 Dec., 1967 [29 Dec., 1966], No. 55477/67. Addition to 1,177,405. Heading G4C. The circuit arrangement of the parent invention is modified in that the second counter can only count to values 0, p, 2p when p registers are accommodated in the store and a logic circuit interrogates p successive first counter states and p further signal lines, one for each register, and portions of the logic circuit allow a signal to issue at counts 1, 2, 3 . . . p between the valves 0 and p or p and 2p. A delay line 5 stores the b, c, d digits of four 16 digit registers A, B, C, D. If the least significant bit of the least significant digit of register A is denoted A1a and the most significant bit of the most significant digit of register A is denoted A16d then the contents of the register are stored in the order A1a B1a C1a, D1a A2a, B2a, C2a, D2a. . . A16a, B16a, C16a, D16a . . . D16d. A quartz clock feeds counter Z1 which counts up to 60, inhibits input gate F1 and enables gate H2 to pass clock pulses to a counter Z2 which can be preset to count to 0, 4 or 8 before emitting a signal which resets counter Z1 and hence allows Z1 to receive the clock pulses again via gate H1. A logic circuit AL comprising four AND gates and an OR gate receives inputs from a control circuit LW defining which register is to be accessed, mA, mB, mC, mD and inputs from four successive counter states of Z1 (for instance states 1, 2, 3, 4). Successive bits of a, b, c, d digit in a particular register are stored 64 clock pulses apart, so control LW enables e.g. register A and presets Z2 to count 4. If AND gate KA is enabled to read out A1a, then 64 clock pulses pass before AND gate KA is again enabled and A1b is read out. After four bits have been read out, as determined by counter Z3 A2a may be required. If so Z2 is preset to count to 8, 68 pulses pass and A2a is read out. Z2 is preset to 4 and the A2 digit can be read out. If the corresponding bit from a different register is required the appropriate control signal enables one of gates KB, KC, KD with Z2 preset for 5 and a count of 65, 66 or 67 occurs reading out, e.g. B1a, C1a, D1a if Aid had been the last bit previously read out.
Patent GB-1356928-A (GB)
Title: Method of securing an optical cable to a panel
IPC: F21V8/00
Filed: 1970-11-21
Abstract: 1356928 Light guides JOSEPH LUCAS (INDUSTRIES) Ltd 12 Nov 1971 [21 Nov 1970] 55500/70 Heading G2J [Also in Division F4] A panel is illuminated by means of an optical cable one end of which is located adjacent a light source and the other end of which is engaged in a groove in a support member secured to the panel. The groove has a pair of narrow portions which grip the cable, and a pair of flexible barbed tags project from the support member and snap into an aperture in the panel.
Patent GB-1440335-A (GB)
Title: Control of a dc motor
IPC: B41J29/38
Filed: 1973-11-30
Abstract: 1440335 Automatic control of position FUJITSU Ltd 30 Nov 1973 [5 Dec 1972 11 Dec 1972] 55605/73 Heading G3N In a system for driving an object to a desired position, a D.C. motor is initially accelerated to a desired speed by a pulse controlled feedback arrangement. When the object reaches a location close to the desired position, the motor is decelerated in steps and then driven in accordance with an analog signal proportional to the distance from the desired position. As shown in Fig. 3A, a motor 16 drives paper in a line printer in accordance with a pulse command from a computer received at terminal 10 of a logic control circuit 11. The shaft of motor 16 also drives a photo-electric position sensor 17 which supplies high frequency pulses indicative of motor speed to the circuit 11, and also produces low frequency trapezoidal pulses the duration of which determines the spacing of lines printed on the paper web. A start command at terminal 10 causes circuit 11 to turn on a field effect transistor D and a signal on line 19 produces a rapid acceleration signal for the motor 16 from a high gain amplifier 15. The speed pulses from sensor 17 are compared with the pulse length of a multi-vibrator and the motor speed is thereby stabilized at a high level by pulse width modulation. Receipt of a stop command causes pulse width modulated deceleration signals to be fed on line 19 to the amplifier 15, the pulse widths being determined by the speed pulses and a series of multi-vibrators. Finally, when the desired position is almost reached, FET D is turned off, and FETs A and B are turned on so that amplifier 15 acts as a servo-amplifier using as analog feedback the negative slope portion of a trapezoidal pulse from sensor 17. The motor stops when a position is reached corresponding to the zero voltage midpoint of this negative slope portion.