baber/WOPTO huggingface dataset:
Patent GB-608295-A (GB)
Title: Manufacture of imidazolines
IPC: C07D233/06
Filed: 1946-05-28
Abstract: Imidazolines are prepared by reacting a nitrile with an aliphatic diamine in which the two amino groups are attached to vicinal carbon atoms, in the presence of hydrogen sulphide or a substance capable of yielding hydrogen sulphide during the reaction, e.g. carbon disulphide, phosphorus pentasulphide, on alkali metal sulphide, an ammonium sulphide, iron sulphide or aluminium sulphide.  The reaction may be effected in the presence of a smaller quantity of hydrogen sulphide than which corresponds to equimolecular proportions of the nitrile and hydrogen sulphide. The nitrile employed may be an aliphatic, alicyclic, aromatic, araliphatic or heterocyclic nitrile which may carry substituents such as halogen atoms, substituted or unsubstituted hydroxyl or amino groups.  The reaction is advantageously carried out in an organic solvent, e.g. ethanol, xylene or toluene, at a raised temperature and in a closed vessel, and a mineral acid such as a hydrogen halide, sulphuric or phosphoric acid may be added.  In examples, the preparation of the following compounds is described: 2-benzyl-imidazoline, 2-[naphthyl-(11)-methyl]-, 2-[41-methoxy - naphthyl - (11) - methyl]-, 2 - (31 : 41 : 51 - trimethoxybenzyl-, 2-(21-methoxy-naphthyl-(11)- and 2-(N - phenyl - aminomethyl) - imidazoline hydrochlorides, and 2-phenyl-, 2-n-pentyl-, 2-cyclohexylmethyl-, 2 - [b  - phenylethyl]-, 2 - [pyridyl - (31)- and 2-[quinolyl-(81)-methyl]-imidazolines.  The samples furnished under Sect. 2 (5) comprise 2-benzyl- and 2-(N-diphenyl-aminomethyl)-imidazoline.
Patent GB-1470799-A (GB)
Title: Compensation loop for a pulse-width modulation device
IPC: G05F5/00
Filed: 1974-04-11
Abstract: 1470799 Automatic voltage regulation INTERNATIONAL STANDARD ELECTRIC CORP 11 April 1974 [11 April 1973] 16216/74 Headings G3R and G3X A regulating arrangement for a pulse width modulation power supply includes a non-linear circuit providing a switching signal with a markspace ratio proportional to the quotient of signals representing the supply output and the input voltage. - As shown in Fig. 6, a D.C.-D.C. converter includes switching transistors Q3, Q4 controlled in a pulse width modulation mode by a known error amplifier circuit ÁA723 receiving a feedback signal Y from a voltage divider 21 connected to the converter output E o . The circuit operates to regulate the output voltage, and the control signals fed to transistors Q3, Q4 are modified to compensate for variations in supply voltage E i . To achieve this, a sawtooth voltage is fed to terminal 3 of the amplifier circuit ÁA723, the amplitude of the sawtooth signal being proportional to a voltage X representing the supply voltage. The frequency of the sawtooth signal is determined by clockpulses H switching field-effect transistors 16, 17 which periodically discharge a capacitor 11. The operation of the circuit is such that the markspace ratio of the switching transistors is proportional to the ratio of the voltages Y and X.
Patent GB-670520-A (GB)
Title: Agricultural weeder attachment
IPC: A01B35/24
Filed: 1949-06-20
Abstract: 670,520. Agricultural implements. REEKIE, J. M. April 20, 1950 [June 20, 1949], No. 16284/49. Class 6(i) A weeding attachment for a tractor comprises a bracket 1 mounted on the tractor tool-bar 12, a plate 2 hinged to the bracket 1, flexible tines 4 mounted on the plate 2 and springs 11 for maintaining the tines in contact with the ground. As shown the tines enter holes in the plate and are adjustably clamped to the plate 2 by means of eye-bolts 8 projecting through slots 7
Patent GB-1378348-A (GB)
Title: Orally administered drug composition for therapy in the treatment of  narcotic drug addiction
IPC: A61K9/00
Filed: 1972-04-10
Abstract: 1378348 Narcotic antagonist WEST LABORATORIES Inc 10 April 1972 [12 April 1971] 16490/72 Heading A5B A preparation useful in combatting narcotic drug addiction consists of a solid composition to be dispersed in an aqueous medium and taken orally, which composition comprises (a) an amine active in the treatment of narcotic drug addiction, the hydrochloride of which is soluble in water but insoluble in alkali, (b) a precipitating agent for the amine selected from (i) alkalizing agents providing an alkaline pH in water either directly or on standing or heating and (2) alkaloids and (c) at least one other solid. The active amine may be propoxyphene or methadone. The precipitating agent may be sodium bicarbonate, disodium hydrogen phosphate or tannic acid.
Patent GB-554237-A (GB)
Title: Improvements relating to machinery lubricating means
IPC: F16N23/00
Filed: 1941-12-23
Abstract: 554,237. Lubricators. ROVER CO., Ltd., and IVERSEN, P. A. SCOTT Dec. 23, 1941, No. 16556. [Class 12 (iii)] To lubricate motor vehicle parts automatically and intermittently, a piston subjected to main oil pressure from inlet i compresses its absorbent pad e so as to force oil to the outlet c. On releasing the oil pressure the pad slowly swells out against the pressure of spring g and absorbs oil leaking past the piston. The oil pressure may be that of the hydraulic brake system, the engine-lubricating system, or a separate system directly controlled by the driver.
Patent GB-822497-A (GB)
Title: A motor vehicle with independently suspended driven road wheels
IPC: B60G11/18
Filed: 1956-05-29
Abstract: 822,497. Road vehicle spring suspensions. MACKERLE, J. May 29, 1956 [June 9, 1955], No. 16567/56. Class 108(2) [Also in Group XXXI] Relates to independently suspended rear driving wheels (see Group XXXI) each supported by an axle casing pivoted at its inner end to a differential gear casing (not shown). The casing carries a plate 15 to which are pivoted convergent, substantially horizontal suspension rods 16, 17, the lower rod 16 forming an arm on a vehicle suspension torsion spring 19 and being about twice the length of the rod 17.
Patent GB-145457-A (GB)
Title: Improvements in spark plugs
IPC: H01T13/46
Filed: 1920-06-18
Abstract: 145,457. Plunkett Energizing Spark Plug Corporation, (Assignees of Plunkett, W. H.). Aug. 31, 1919, [Convention date]. Sparking-plugs. - The central conductor is divided so as to produce one or more sparks in series with that which ignites the charge, these additional gaps being formed within chambers a, b surrounded by the interengaging sections 5, 6, 7 of insulation. The sizes of the gaps may be adjusted by means of mica washers 16, 19<1>. To promote cooling, the surface of the insulation which is exposed to the explosion is ribbed. The spark between the electrodes 8, 3 takes place within a recess 12.
Patent GB-630189-A (GB)
Title: Improved apparatus for alternately reducing and increasing the atmospheric pressure within a zone, particularly for use in machines for filling containers with powdered material
IPC: B65B1/26
Filed: 1945-06-29
Abstract: 630,189. Moulding powdered substances. CARTER, C. F. June 29, 1945, No. 16596. Convention date, Aug. 18, 1944. [Class 87 (ii)] [Also in Group XVII] The Specification as open to inspection under Sect. 91 comprises a filling-machine including a hopper 30, Fig. 1 (Cancelled), having a plurality of filler heads 32, Figs. 1 (Cancelled) and 6 (Cancelled), and driven by a motor 48 through chains 38 and 40, Figs. 1 (Cancelled) and 3 (Cancelled), and sprockets 19, 18 secured to the hopper casting 13 to rotate about a stationary hollow shaft 12. Containers 22 are each fed on to a plate 21 and carried by the chains to a position under a filler head, whereafter an arm 26 is released from a cam track and a spring 28 raises the plate 21 and presses the mouth of the container into filling position against the gasket 86 of the filler head; which rotates with the container during filling, the plate 21 then being lowered and the container carried on to an unloading position. Powder is drawn rapidly into the container through a head 32 by means of reduced pressure in the container, and towards the end of the filling cycle a compressor at the lower end of a member 33 on a shaft 34 compresses the powder in the container to allow more to enter, the member 33 having agitators along its length to shake the powder in the head. Each shaft 34 has at its upper end a pulley 36, Fig. 2 (Cancelled), and is thus rotated by a belt 56 driven by a motor 53 during part of the cycle, the belt being positioned around idler pulleys 57, 58. A pump attached to a pipe 70 produces a vacuum in a chamber 71 in the casting 13. By means of apertures 73, 77 in a stationary ring 72 and a rotating ring 76 embracing the chamber 71, and flexible tubes 80, 81 connected to the screened apertures 84, 85 and rotating with the ring 76 to register in predetermined order with the apertures 73 and with ports 75 leading to atmosphere, air is withdrawn from the container alternately through the apertures 84, 85. In another form, the tubes 80, 81 of each filling head are connected to the ports 122, 124 of a valve device (see Group XVII), the parts 70, 71, 72, 76 being dispensed with, and the shaft 34 being stopped some time before removal of the container to allow removal of dust therefrom. Each filling head may have several tapered openings. The apparatus may also be used for supplying powdered resins, plastics, wood fibre, clays, &c., to mould-forms, and may supply several moulding-machines, being synchronised thereto. This subject-matter does not appear in the Specification as accepted.
Patent GB-960229-A (GB)
Title: Method of age hardening magnetostrictive cores
Inventor: LEVESQUE PASCAL
IPC: H01L41/47
Filed: 1961-05-08
Abstract: Magnetostrictive material in rod form is prepared from an alloy containing in percentage by weight .Ni.41-43 .Cr.5.0-5.8 .Ti.2-3 .C.0-0.04 .Mn.0.2-0.6 .Fe.balance by solution treating in the range 900-1000  DEG C. and quenching, followed by cold working to give at least a 50% reduction in cross-sectional area, and then a two stage precipitation treatment in the range 500-650  DEG C., the second stage being carried out at a higher temperature than the first. Each stage of the precipitation treatment may last for 2-3 hours or 18-30 hours.
Patent GB-315068-A (GB)
Title: Improvements in shock absorbers or vibration dampers and the like
IPC: F16F9/46
Filed: 1928-06-08
Abstract: 315,068. Rule, T. B. June 8, 1928. Springs, arrangement of. - A part s of the frame or chassis of a vehicle is supported on the axle by a fluid-friction vibration damper in which a plunger b enters a cylinder a, and oil which is thus put under pressure comprises air trapped in a hollow central filling plug, lifts the one way valve c against the pressure of a helical spring and also lifts the annular valve n against the helical spring m. The movements are damped by restricting the area of the orifices through which the oil flows.
Patent GB-1413554-A (GB)
Title: Nuclear fuel
IPC: G21C3/62
Filed: 1973-04-06
Abstract: 1413554 Dysprosium aluminate CENTRE D'ETUDE DE L'ENERGIE NUCLEAIRE 6 April 1973 [12 April 1972] 16713/73 Heading C1A [Also in Division G6] Dysprosium aluminate, for addition to nuclear fuel as a burnable poison, is a mixed compound of Dy 2 O 3  and Al 2 O 3  in any proportions but is preferably of the formula 3Dy 2 O 3 .5Al 2 O 3 . This compound is prepared by mixing powdered alumina and dysprosium oxide in the stoichiometric proportions, fusing the mixture, cooling, grinding to a particle size below 10 microns, compressing into pellets, and then heating to homogenize the product, which may be granulated and mixed with UO 2 .
Patent GB-342988-A (GB)
Title: Improvements in index tabs
IPC: B42F21/08
Filed: 1930-05-30
Abstract: 342,988. Index tabs. SCHLEIFER, W., 144, Penzingerstrasse, Vienna. May 30, 1930, No. 16758. Convention date, June 3, 1929. [Class 16.] A tab for index cards comprises a frame a, Figs. 1 and 4, with three adjoining depending strips b, c, d which are bent so that the two outer strips b, d are adapted to secure the tab in slots e provided in the index card f, whilst the central strip c forms a backing for the frame a. The lower edge of the frame a rests firmly on the upper edge of the index card, and the side edges g of the frame are bent over to prevent lateral movement of indicator slips inserted in the frame.
Patent GB-362423-A (GB)
Title: Improvements in and relating to dies for extruding rods and wires
IPC: B21C25/02
Filed: 1930-05-30
Abstract: An alloy which is cast to form a metal-working die may be formed of tungsten carbide, with 1-7 per cent of carbon, and less than 20 per cent of low-melting metals.  Some of the tungsten carbide may be replaced by chromium or by a metal of the same group, such an alloy having the composition, chromium up to 30 per cent, iron, cobalt, or nickel up to 20 per cent, and tungsten carbide with 1-4 per cent of carbon.  Instead of melting tungsten carbide, metallic tungsten may be melted in the presence of carbon, or carbon-yielding gases.
Patent GB-1537452-A (GB)
Title: Apparatus for cooking a foodstuff
IPC: A47J37/04
Filed: 1977-04-22
Abstract: 1537452 Frying egg mixtures TOSHINGIKEN KK 22 April 1977 [24 April 1976] 16853/77 Heading A4D Apparatus for frying omelettes comprises a number of frying pans 2 arranged around a rotatable support member 1, gas burners 8 on the support member for heating the frying pans, and a drive mechanism (5, 6, 7, 25) for intermittently rotating (through gearing 26, 29) the support member and also actuating (through gearing 27, 30) a pump 17 which supplies egg mixture from nozzles 23 to the frying pans. The apparatus includes frying pans which may be lifted about pivots for ejecting the omelettes and as in Fig. 7 (not shown), the pans may each be in two halves able to be pivoted one over the other. The egg mixture nozzles 23 are positioned over one half, Fig. 2 (not shown), of each two halved pan in turn and an air actuated piston and cylinder (21) causes the nozzles 23 to move from over the one half (9) to cover the other half (10), Fig. 5 (not shown), when a switch (41) is actuated.
Patent GB-706382-A (GB)
Title: Improvements in or relating to clutches
IPC: F16D67/06
Filed: 1952-07-04
Abstract: 706,382. Combined clutch and brake. HOOVER, V. A. July 4, 1952, No. 16856/52. Class 80 (2)  An electromagnetically-controlled clutchbrake device comprises a driving shaft 10, to which is secured a driving disc 22, a driven disc 20 on an axially .movable driven shaft 15, a fixed brake disc 21, bearing means, such as bearings 43, 44, supporting the driven shaft, the bearing 43 being axially immovable with respect to the driving shaft and the bearing 44 being axially immovable with respect to the driven shaft, resilient means, such as a compression spring 49, between the bearing means, tending to cause engagement of the driven disc with the brake disc, and magnetic means, such as a stationary coil 30, operable to. move the driven shaft axially against the force of the resilient means to engage the clutch. As shown. the outer race of the bearing 43 is secured to the casing surrounding the device and the driven shaft slides axially within its inner race, while the inner race of the bearing 44 is secured to the driven shaft and its outer race slides in the casing. The parts supporting and surrounding the coil 30 are all made of magnetic material. save for the flange 28 of the coil support and the friction linings 50 on the driven clutch disc, which are both of non-magnetic material, the resulting flux-path of the coil being as shown by the arrows. The friction lining 50 on the clutch disc is formed of tobin bronze sprayed on to the disc 20 in the molten state and machined to the correct size. The central portion of the driving disc 22 is reduced in thickness by the formation of an annular groove 29, which allows the outer portion of the disc to be flexed with respect to the driving shaft and compensates for any slight misalignment of the driving shafts. As shown, the driving shaft 10 is a continuation of the driving shaft of a reversible electric motor and the coil 30 is connected in series with the motor, so that the clutch is automatically engaged when the motor drives.
Patent GB-635148-A (GB)
Title: Friction brake or clutch
IPC: F16D13/52
Filed: 1947-06-26
Abstract: 635,148. Disc brakes. LETOURNEAU, Inc., R. G. June 26, 1947, No. 16934. Convention date, Aug. 6, 1946. [Class 103 (i)] [Also in Group XXIV] A friction brake of the type comprising an outer drum 1 surrounding an inner drum 2, the drums being concentrically spaced and relatively rotatable, annular friction discs disposed between the drums, alternate series of discs 3 and 4 being axially but non-rotatably shiftable relative to the inner and outer drums 1 and 2 respectively, and a fluid pressure actuated control ring 18 operative to clamp the discs together, is characterized in that a perforate member or members 19 of material that is relatively thin in the radial direction of the discs is fixed between the control ring 18 and the adjacent end disc to minimize heat transfer therebetween.
Patent GB-796081-A (GB)
Title: Electric pulse communication system
IPC: H04J3/06
Filed: 1956-06-01
Abstract: 796,081. Multiplex pulse signalling pulse generating circuits. STANDARD TELEPHONES & CABLES, Ltd. June 1, 1956 [June 6, 1955], No. 16998/56. Classes 40 (5) and 40 (6). A pulse generator comprises a sine wave source 1, Fig. 1, a circuit including a half-wave rectifier 2 and a time constant network and a differentiating circuit 7 whereby a rectified half sine wave distorted by the time constant network to have a shallow leading edge and a steep trailing edge, curves A, Fig. 2, is differentiated to produce a pulse coincident with the sharp transition to the steep trailing edge, curve B. The time position of the pulse 11, curve B may be modulated by varying the bias of diode 3 derived from source 12 and resistor 6. A multichannel pulse communication system using the generator is described, Fig. 4 (not shown). A low-pass filter, Fig. 5 (not shown), prevents interference between the modulation channel and the input from the commutator. In another embodiment the audio source 68, Fig. 6, and sine wave source 66 are isolated by means of a bridge 67, maintained in balance by the rectifier circuit 81, 82, 83 whose values are identical with those of circuit 84, 69, 74 and 75. A circuit is described for generating a double pulse marker signal, Fig. 7 (not shown). In another embodiment the modulator circuit is a dual of that of Fig. 1, Fig. 8 (not shown).
Patent GB-807094-A (GB)
Title: Method of recovery of uranium by a resin-in-pulp process
IPC: B01J47/10
Filed: 1955-06-13
Abstract: <PICT:0807094/III/1> <PICT:0807094/III/2> <PICT:0807094/III/3> In the recovery of uranium compounds from leach pulps with a granular ion exchanger, the liquor is flowed through a substantially vertical screen having mesh openings finer than the particle size of the ion exchange material but coarser than the pulp solids and a turbulent layer of gas bubbles is passed upwardly across the screen to prevent clogging thereof by ion exchange particles or suspended solids.  As shown in Fig. 2, a mixture of granular ion exchanger and acid leach ore pulp is placed in a vessel provided with a sloping bottom 3 and a vertical screen 4.  A continuous stream of air bubbles from a perforated pipe 5 passes up the screen and the treated liquor is removed at overflow 8.  Liquor passing through the screen to compartment 1 may also be agitated by air bubbles from a perforated pipe 23 and the barren liquor leaves at 8 either by gravity or by an air lift through pipe 9.  A series of such cells may be employed in a circular configuration as shown in Figs. 5 and 7.  Each cell is provided with a movable spout 11 which may be turned towards an inner channel 14, Fig. 5, or through the next adjacent cell or to an outer channel 13.  In operation a pulp from the sulphuric acid leaching of tailings from the cyanidation of gold ore is introduced into cell A and flows successively through cells A to D when the barren liquor is discharged into the central channel 14. In the meantime eluting fluid such as a mixture of hydrochloric acid and ammonium chloride is fed successively through cells E to H and recovered from the latter in the outer channel 13.  Once cell A is exhausted it is connected to cell H and fresh pulp is fed first to cell B.  Alternatively a series of cells may be arranged so that the resin is transported from cell to cell countercurrent to the transference of pulp, the resin thereby being passed through a series of adsorption and elution cells for return to the first cell of the series.
Patent GB-146130-A (GB)
Title: Improvements in radiators or coolers
IPC: F28F9/18
Filed: 1920-06-23
Abstract: 146,130. Pressed Metal Radiator Co., (Assignees of Sonneborn, C.). June 22, 1916, [Convention date]. Headers and tube-plates, constructions of.- Tubes 10 enter the slightly coned inturned apertures 9 in a dished thin metal header 2 and are welded thereto. The outer halves 1 of the headers are united to the inner at their flanged edges 3 by welding.
Patent GB-1505749-A (GB)
Title: Method of manufacturing an electric lamp
IPC: H01K1/24
Filed: 1975-04-24
Abstract: 1505749 Electric incandescent lamp manufacture PATENT - TREUHAND - GES FUR ELEKTRISCHE GLUHLAMPEN mbH 24 April 1975 [26 April 1974] 17069/75 Heading H1F A halogen incandescent lamp, for example, having a tubular envelope 1 with a longitudinally extending coiled filament 4 supported by a number of tungsten filament supports 9 having an inner coiled section 10 of diameter larger than the filament and an outer coiled section 11 which resiliently engages the inner wall of the envelope, is manufactured by a method including the steps of reducing the diameter of the outer section 11, e.g. by threading it on to a plug of smaller diameter, inserting it into the envelope and releasing the tension to enable the outer section to expand into retentive engagement with the envelope. After withdrawing the plug the mount comprising the filament 4, sealing foils 5, 6 and lead-in wires 7, 8 is threaded through the supports mounted in the envelope. In order to more firmly locate the supports in the envelope, the region of the envelope adjacent the supports may be heated by an annular burner, the supports being impressed as at 23 due to their resilience in the softened envelope wall. The envelope may be straight or U-shaped, the latter being formed by heating and bending a straight tubular envelope.