baber/WOPTO huggingface dataset:
Patent GB-1524361-A (GB)
Title: Apparatus for controlling the air-fuel mixture ratio of internal combustion engine
IPC: F02D35/00
Filed: 1975-10-09
Abstract: 1524361 Automatic control of engine air/fuel ratio NISSAN MOTOR CO Ltd 9 Oct 1975 [21 Oct 1974 (2) 18 March 1975] 41382/75 Heading G3R The air/fuel ratio supplied to an engine is controlled according to whether an exhaust gas composition signal is above or below a predetermined value, and the rate of control depends upon another engine parameter (speed or throttle setting). The object is to reduce hunting in the gas composition control system, the frequency of which depends upon speed and induction air-flow. The ratio is controlled by pulses whose width is modified by an integrating amplifier 16, with or without the addition of a proportional amplifier 17. 16 integrates alternately up and down as the exhaust composition oscillates about the set value, the integration rate being dependent upon the engine parameter. As shown, the integrater input is derived from the output of a threshold switch (comparator) 12 via limiter 13, the limit being proportional to or a function of engine speed. The integrator has a constant characteristic but the integration rate depends upon the applied voltage; thus, a higher rate for a shorter time (due to more rapid oscillations) and vice versa results in equal amplitude peaks in the output Fig. 4 (not shown) which controls the width of pulses from a generator 20 supplying a carburetter or fuel injector 22. Reference has been directed by the Comptroller to Specification 1410545.
Patent GB-1356937-A (GB)
Title: Pyrimido-isoquinolines
Inventor: HODSON H F
IPC: A61K31/505
Filed: 1970-08-27
Abstract: 1356937 Pyrimido - isoquinolines WELLCOME FOUNDATION Ltd 11 Aug 1971 [27 Aug 1970 30 Nov 1970] 41402/70 and 56781/70 Heading C2C The invention comprises compounds of formula and their acid addition salts, wherein X<SP>1</SP> and X<SP>2</SP> are each H or together form an additional bond. These compounds are prepared by (1) reacting 1 - aminoisoquinoline or 1 - amino - 3, 4 - dihydroisoquinoline with CH 2 :CHCO 2 R or ZCH 2 CH 2 CO 2 R, where R is C 1 -C 6  alkyl and Z is a nucleophilic atom or group, (2) cyclizing 3 - (1 - imino - 1,2 - dihydro - 2 - isoquinolyl)- propionic acid or its 3,4 - dihydro derivative, or (3) oxidizing 1,3,4,6,7,11b - hexahydro - 2- oxo-2H-pyrimido[2,1-a]isoquinoline. Therapeutic compositions for oral, parenteral or rectal administration comprise compounds of the above formula, which have antiflammatory and antiarthritic activity.
Patent GB-1361999-A (GB)
Title: Ultrasonic examination apparatus
IPC: A61B8/00
Filed: 1971-09-06
Abstract: 1361999 Ultrasonic inspection devices F HOFFMANN-LA ROCHE & CO AG 6 Sept 1971 [18 Sept 1970] 41412/71 Heading H4D [Also in Division H1] Apparatus for the ultrasonic examination of an object comprises a transmitter in the form of a cathode-ray tube having a faceplate with a piezo-electric transducer layer mounted thereon, a receiver for reflected ultrasonic waves from the object, a visual display device, and an ultrasonic lens arrangement for concentrating the transmitted and reflected ultrasonic waves. In the Fig. 1 embodiment an electron beam from gun 19 is scanned over the exposed surface of a piezo-electric slab 17 mounted via an electrically insulating (but acoustically conducting) layer 18 on a faceplate 16. An electrical signal at the required ultrasonic carrier frequency is applied by pulse generator 23 to a grid 21, whereby that portion of the slab 17 surface illuminated by the electron beam acquires a voltage close to the voltage on grid 21 and a corresponding acoustic pulse is emitted. The acoustic energy is focused by acoustic lens 25 to some point within a test object 14 in water-tank 12, and the object is thus scanned in a "flying-spot" manner. Reflected energy is received via acoustic lens 26<SP>1</SP> and transducer 26, whose output is amplified at 27, demodulated at 28, and fed to intensity-modulate a television-type display 29 scanned in synchronism with the electron beam of the gun 19. Faceplate 16 is of brass to provide electrical screening and its thickness is an acoustic half-wavelength multiple to give low acoustic reflection at the faceplate/water interface. Shield electrode 22 prevents the voltage on grid 21 from degrading the electron beam focus or deflection. An inclined, partiallyreflecting acoustic mirror may be inserted between the acoustic source and object 14 to direct object-reflected energy on to transducer 26 and also to attenuate the energy reaching object 14 (e.g. in medical diagnostic applications). In a second embodiment (Fig. 3, not shown) a plane at a selected depth in object 14 is investigated by applying a frequency-swept signal to grid 21, heterodyning this signal with the received signal from transducer 26, band-pass filtering the result, and feeding the filter output via demodulator 28 to display 29.
Patent GB-1525438-A (GB)
Title: Process for the production of 2,3-dichloro-1,3-butadiene
IPC: C07C67/00
Filed: 1976-10-06
Abstract: 1525438 2,3-Dichloro-1,3-butadiene BAYER AG 6 Oct 1976 [9 Oct 1975] 41447/76 Heading C2C  2,3-Dichloro-1,3-butadiene is obtained by the addition of 0À1-50 wt. per cent of a phasetransfer catalyst which is a quaternary ammonium or phosphonium salt or at least a diorgano substituted sulphonium salt to a mixture of 2,3,4-trichloro-1-butene and an aqueous solution of alkali metal hydroxide, 0À05-10 parts by weight of the catalyst being used per 100 parts by weight of the halobutene, the reaction being conducted at -10 to +10‹ C., without any significant fluctuations, in the presence of O 2 . Preferably a continuation of at least one inhibitor soluble primarily in the monomer phase, e.g. phenothiazine and/or N-nitrosodiphenylamine and at least one inhibitor soluble in the aqueous phase, e.g. diethyl hydroxylamine are present. The molar ratio of butene to alkali metal hydroxide, e.g. NaOH is 1 : 1À05-1À5. The aqueous catalyst solution is preferably 0À5-10 wt. per cent.
Patent GB-1311948-A (GB)
Title: Thyristor-regulator
IPC: H02M3/137
Filed: 1970-08-28
Abstract: 1311948 Control systems for inductive loads ALLMANNA SVENSKA ELEKTRISKA AB 28 Aug 1970 [1 Sept 1969] 41505/70 Heading H2H [Also in Division H3] In a system in which D.C. to a load 9 is regulated by a thyristor 1 which is turned off by an auxiliary thyristor 3 in an oscillatory circuit comprising an inductor 5 and a capacitor 6, the inductor is common to the load circuit and to the oscillatory circuit, and the two thyristors and the capacitor are in parallel with each other and in series with the load. 1 and 3 are triggered alternately by adjustable means 11 so as to regulate the average current in the load. Initially, the upper plate of 6 is positive, but the charge reverses via 5 and 3 when 3 is triggered, turning off 1. This charge is dissipated through the load and recharging occurs with the original polarity ready for the reset operation. 2 is a "flywheel" diode for the load. A resistor 7 and diode 8 may be provided to maintain "overcharge" of the capacitor 6 resulting from any inductance in the supply conductors. In Fig. 2 (not shown) the thyristors 1 and 3 are each replaced by a parallel pair and the inductor has four close coupled windings, one in series with each thyristor.
Patent GB-1444852-A (GB)
Title: Method of and apparatus for marking timing indicia on vehicle engines
IPC: F01B31/00
Filed: 1974-09-25
Abstract: 1444852 Marking timing marks on vehicle engines CROSS CO 25 Sept 1974 [12 Nov 1973] 41653/74 Heading B4X [Also in Divisions F1 and G3] A method of marking radial timing indicia 33, Fig. 4, on vehicle engine blocks 12, Fig. 5, comprises the steps of preforming a timing mark 34 on the engine pulley 28, providing means (such as a notch 51, Fig. 4) on the pulley a first known angular distance a from said mark for actuating a sensor 50, mounting the sensor 50 and a marking tool 52, 53 on an angularly adjustable carriage 49 at a second known angular spacing b, the carriage 49 being mounted for angular adjustment about an axis coincident with the crank-shaft axis, rotating the crankshaft, measuring the angular distance between the arrival of the actuating means 51 at the sensor and top-dead centre of cylinder No. 1, angularly adjusting the carriage until this measured angular distance equals the difference between angles a and b and then causing the marking tool to form radial indicia on the engine block. Apparatus for carrying out the method is described in connection with an assembly line from which engines are automatically diverted to the timing station. At this station each engine is located and driven at measured speed, sensors 23, 25 and 50, Fig. 5, for the speed of rotation, TDC, and notch position respectively being coupled to a comparator 59 forming part of a servo system including a servomotor 58 for adjusting the carriage 49 to the required position. The marking tool 52, 53 is actuated automatically when this position is attained. Signals may simultaneously be given from the TDC sensor 25, speed sensor 23 and a distributer points closure sensor 66, Fig. 5, to a second comparator 68 forming part of a second servo-system which includes a servomotor 74 for adjusting the distributer 67 to a desired angular position.
Patent GB-1363650-A (GB)
Title: Flame-retardant non-woven fabric
IPC: D04H1/64
Filed: 1971-11-17
Abstract: 1363650 Spot-bonded fibre fabric; flameproofing fabrics JOHNSON & JOHNSON 17 Nov 1971 [1 Sept 1970] 41725/70 Headings DIP and D1R [Also in Division B5] A non-woven fabric comprising flammable cellulosic fibres and fire retardant cellulosic fibres is bonded in discrete areas with binder plus fire retardant. Preferably 5% to 95% fire retardant rayon staple and 95% to 5% flammable rayon or cotton staple are carded or air laid together into a web. Alternatively layers of fire retardant rayon and flammable rayon may be superposed; the top and bottom layers being fire retardant rayon. The web may be reticulated and then printed with an aqueous emulsion using a roller engraved with a pattern of spaced dots. The exemplified emulsion contains an ethyl acrylate/acrylonitrile copolymer, phosphate plasticised PVC, diammonium hydrogen phosphate as fire retardant, a non-ionic surface active agent, a silicone antifoaming agent and a pigment. The rayon may be delustred by titanium dioxide.
Patent GB-1477219-A (GB)
Title: Removal of sulphur dioxide from waste gases
IPC: C01B17/60
Filed: 1974-09-25
Abstract: 1477219 Removing SO 2  from gases NEW JERSEY ZINC CO 25 Sept 1974 [28 Sept 1973] 41771/74 Heading C1A SO 2  is removed from gas mixtures containing a small proportion (e.g. less than 2%) thereof by contacting the gases with a slurry of ZnO in H 2 O or with a slurry of ZnO in ZnSO 4  solution, the pH of the slurry being maintained constant. (e.g. above 4) by the presence of ZnO in the slurry, and separating from the resulting liquor crystals of ZnSO 3  and ZnSO 4  which are formed as absorption of SO 2  is continued. The slurry suitably contains more than 2 wt. per cent Zn, and is between room temperature and 70 C. The supernatent liquor after separation of ZnSO 4  and ZnSO 3  may be made up with H 2 O, ZnO and/or ZuSO 4  and recycled.
Patent GB-919851-A (GB)
Title: Improvements in or relating to carding engines
IPC: D01G15/80
Filed: 1959-12-12
Abstract: 919,851. Stripping carding surfaces. COOK & CO., MANCHESTER, Ltd., and MILNES, A. H. Nov. 29, 1960 [Dec. 12, 1959], No. 42325/59. Class 120 (1). A bank of carding engines has each cylinder and doffer pneumatically stripped during operation by traversing suction nozzles controlled in such manner that the engines are stripped in turn. In each carding engine, suction nozzles are carried in proximity to the main cylinder and the doffer by a double helical screw 23 driven through a pulley 25 associated with a clutch for rendering the screw 23 operative under the influence of a solenoid. When the nozzles have moved across the cylinder and doffer, a lever mounted on the nozzle carriage engages an abutment 42 to cut off the nozzles from the suction source and energize a solenoid on the next carding engine in the stripping series. The nozzles of the first carding engine are returned to the starting position, whereupon the first solenoid is deenergized and the clutch disengaged. In a modification, only a half of each carding surface is stripped during a single nozzle traverse, Another modification has means for stripping cylinders and doffers independently and another has a traversing compressed air nozzle serving to blow fibres to the top of the card clothing of the cylinder adjacent the flats. It is preferred to use trapezium shaped suction nozzles. An air blast arrangement is provided for piecing up separated portions of web.
Patent GB-1128967-A (GB)
Title: Load-responsive valve for pneumatic hoists
IPC: B25H1/00
Filed: 1967-09-18
Abstract: 1,128,967. Valves. BIRFIELD ENG. Ltd. 18 Sept., 1967 [22 Sept., 1966], No. 42366/67. Heading F2V. [Also in Division B8] A controller for the air supply to a pneumatic load balancing hoist (see Division B8) comprises a main air passage between a supply 60 and an outlet 58A to the hoist, and including a manually adjustable main regulator 66 which is controlled by pilot air pressure in a chamber 72 acting on a diaphragm 71. The pilot air taken from the supply 60 is controlled by a regulator 70 and setting screws 76, 78 and passes through a line 80 to a load responsive relief valve in the hoist loading rope. The outlet 58A to the hoist is controlled by a check valve 68 operated by the main air passing the regulator 66.
Patent GB-971841-A (GB)
Title: Wide-band amplifier
IPC: H03F3/40
Filed: 1962-11-12
Abstract: 971,841. Amplifying circuits. BECKMAN INSTRUMENTS Inc. Nov. 12, 1962 [Nov. 13, 1961], No. 42580/62. Heading H3W. In a wideband amplifier the higher frequencies are passed by a transformer 1 to a " fast " amplifier 2, while the lower frequencies are passed to a modulator 3, the input of which is short-circuited for the higher frequencies by a shunt capacitor 22. The modulator may be of the " chopper " type and passes the low frequencies as modulation on a carrier wave to a second transformer 4 and thence to a " slow " amplifier 5. The output of the " slow " amplifier is demodulated in a demodulator 6 and the reformed low frequencies recombined with the higher frequencies in a mixer 7. Part of the output is taken off by means of an adjustable potentiometer comprising variable resistors 41, 42 together with variable inductor 44 and applied as negative feedback to the input. In the negative feedback path the higher and lower frequencies are again split, the higher frequencies passing via transformer 8 and the lower frequencies via modulator 9, the input of which is by-passed for high frequencies by capacitor 47. The output of the modulator 9 is passed over transformer 10 to demodulator 11, the output of which is shunted for high frequencies by capacitor 27; the low frequency demodulator output and high frequency output from transformer 25 are combined in series with the signal input. The transformers 1, 4, 8, 10 are provided with primary screens 56 which are connected to the input terminal 13, inner guard shields 57 which are connected to the earth 59 on the cable connecting the amplifier to a transducer, and secondary screens 58 which are connected to the earth terminal on the output side. The Specification also describes (Figs. 2, 3, not shown) modifications in which the degree of feedback is determined by resistive networks on the input side of the system instead of on the output side. Specification 877,998 is referred to.
Patent GB-934093-A (GB)
Title: Conversion of alkali metal fluorides to chlorides
IPC: C01D3/04
Filed: 1961-11-29
Abstract: An alkali metal chloride is produced by introducing hydrogen chloride, e.g. anhydrous HCl, into a substantially anhydrous fused salt bath containing at least one fused alkali metal fluoride, and the hydrogen fluoride set free is recovered.  The salt bath may be one serving as an electrolyte for the deposition of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, or W.  The reaction temperature may be from the melting point of the salt bath to 1000 DEG C., the preferred temperature with a predominantly fused NaCl bath being 820 DEG C. About 0,25 to 1 litre per minute of HCl may be introduced.  The HF may be absorbed in NaOH or condensed at low temperature.  In Example I, a salt mixture containing 35,2% NaCl, 28,1% NaF and 36,7% KF is loaded into a graphite container in a stainless steel reactor, and after sealing and flushing with argon, the charge is melted under an argon atmosphere at 800 DEG C.  Anhydrous HCl is passed through the melt for 120 minutes at about 0,5 litres/minute by means of a stainless steel tube dipping beneath the surface, the off-gases from the reactor being absorbed continuously in NaOH solution.  After stopping the HCl flow, the system is cooled.  In Example II, potassium fluotantalate is charged into fused NaCl maintained at 810 DEG -1000 DEG C. under an argon atmosphere, electrolysis is initiated, and anhydrous HCl is introduced below the surface of the bath adjacent to the anode at 0,25-1 litre/minute.  The evolved HF is collected in aqueous NaOH or condensed, or recycled to produce additional fluotantalate.
Patent GB-1469605-A (GB)
Title: Signal smoothing device
IPC: G05F1/56
Filed: 1975-10-17
Abstract: 1469605 Smoothing circuits SIEMENS AG 17 Oct 1975 [4 Nov 1974] 42822/75 Headings H3W and H4L [Also in Division H2] A waveform smoothing circuit comprises an amplifier 12 having an input 10 for an unsmoothed waveform feeding an integrator 15, a negative feedback path (via 27) from the output of the integrator to the input of the amplifier, and means, e.g. 23, limiting the input signal to the integrator to predetermined maximum values, the smoothed waveform issuing from the output 2 of the integrator. The said limiting means may be constituted by saturation of the amplifier 12. The waveform to be smoothed may be A.C. mains voltage having, e.g. a sudden dip in voltage due to commutation over a short time interval (t 1  to t 2 ), Fig. 4 (not shown). When the input voltage at 10 fails to balance the feedback voltage at 12a the amplifier 12 produces a transient output which is limited in amplitude by the limiter 23. After integration at 15 the voltage dip in the output waveform is relatively small. The effectiveness of the circuit is increased by an arrangement rendering the limiting voltage level approximately equal to the undisturbed voltage level at the output of 12. A further integrator 17 is connected to a proportional amplifier 24 the output of which is arranged to be equal to the voltage U v  at 12b, so that a fluctuation in U v  is limited in range by the threshold voltages of diodes 21, 22, (2D), Fig. 4 (not shown). The gain of proportional amplifier 24 is adjusted for variations of frequency by a frequency-to-voltage converter 25.
Patent GB-1204167-A (GB)
Title: A method of producing a tubular body from a cylindrical metal billet by cold working and an apparatus thereof
IPC: B21C23/08
Filed: 1967-09-20
Abstract: 1,204,167. Forging. TOKAI RIKA DENKI SEISAKUSHO K.K. 20 Sept., 1967 [4 Feb., 1967], No. 42833/67. Heading B3H. Apparatus for forming a tubular body e from a cylindrical billet a comprises a first station with a die 34 and punch 43 to perforate the billet without axial restraint, a second station with a die 35 and punch 44 to axially size the tube c and size the bore by moving surplus metal c<SP>1</SP> against the tube blind end and a third station with a die 36 and punch 45 to remove the surplus and the blind end. The tube d is then moved to a fourth station with a die 37 and punch 46 which forces the tube through a sizing die 48. The dies are mounted in line on a bed 3 and the punches on a member 42. The punches are guided by bushes in a plate 5. A billet transfer slide 6 is reciprocated between the bed 3 and the plate 5 by a cam (12), Fig. 1a (not shown), acting on a roller 10 on the underside of the slide. The slide is biased by springs 9 towards the cam. The slide has a central slot 13 and spring-urged fingers 18 are arranged in opposed recesses along the slot. The billet is fed by gravity down a passage 23 on to a rod 32 and is pushed between a pair of fingers on the slide by a pneumatic piston 29 against spring 31, 33 bias. The slide is reciprocated in timed relationship with the punches. At the first station the punch 43 forces the billet from the fingers 18 into the die 34 which has a diameter equal to the finished tubular body. The punch 43 has a diameter substantially equal to the inner bore of the finished body and a shoulder which does not limit axial flow. Alternatively a punch 43<SP>1</SP> has a stepped form. The rough product b is ejected from the die into the next set of fingers on the slide 6 and moved to the second station. At this station a two-part punch 44a, 44b serves to give the product the same length l as the finished product and surplus metal c<SP>1</SP> is deposited against the blind end. The punch member 44b is arranged to be spaced from the blind end at the end of its downstroke. The billet is ejected and transferred to the third station for removal of the surplus metal and the blind end. The product is then transferred to a final station with a sizing ring 48, a punch 46 and a stripper ring 50. The ends of the tubular body may be tapered by use of suitably shaped punches, dies and ejectors, Figs. 8-9 (not shown). The die at the second station may have a recess (55), Fig. 10 (not shown), to receive surplus metal.
Patent GB-915025-A (GB)
Title: Improvements in and relating to control mechanism for multiple change-speed gear boxes
IPC: F16H61/02
Filed: 1959-12-16
Abstract: 915,025. Change-speed control. TATRA, NARODNI PODNIK. Dec, 16, 1959 [Jan. 13, 1959], No. 42855/59. Class 80 (2). Each of the ratios of a change-speed gear in a motor vehicle is established when compressed air is admitted from a pipe 28 through a valve 29, which may be of the type described in Specification 915,024, to pipes 22 ... 27 leading to servo cylinders 15... 18 containing pistons 9 ... 13 connected by rods 5 ... 8 to selector forks 1 . . . 4. The selector forks 1, 3 each have a ratio established position and a neutral position, the selector fork 2 has two ratio established positions but no neutral position, while the selector fork 4 has two ratio established positions and a neutral position. Pipes 19 ... 21 leading to the servo cylinders 15, 17, 18 are fed with compressed air when it is desired to restore the associated selector forks 1, 3, 4 to their neutral positions. Compressed air is vented from the system through an outlet 30, and the valve 29 is controlled by a handle 32 mounted beneath the steering-wheel 34 of the vehicle. Specification 899,349 also is referred to.
Patent GB-1263517-A (GB)
Title: Substituted resorcylic acids and esters and process for making same
Inventor: GROSSMAN JAMES DOUGLAS
IPC: C11B9/00
Filed: 1969-08-29
Abstract: 1,263,517. Perfumes. INTERNATIONAL FLAVORS & FRAGRANCES Inc. 23 Aug., 1969 [30 Aug., 1968], No. 43080/69. Heading A5B, [Also in Division C2] Perfume compositions comprise compounds of the formula: wherein R, and R 2  are alkyl radicals containing 1-5 carbon atoms, at least one of R 1  and R 2  containing two or more carbon atoms and R 3  is hydrogen or an alkyl radical containing 1 to 5 carbon atoms (see Division C2). Examples describe chypre essences containing such compounds.