baber/WOPTO huggingface dataset:
Patent GB-1471150-A (GB)
Title: Self-biased class c oscillators
IPC: H02M7/5383
Filed: 1973-07-30
Abstract: 1471150 Transistor oscillators THORN ELECTRICAL INDUSTRIES Ltd 18 June 1974 [30 July 1973] 36200/73 Heading H3T [Also in Division H2] In a transistor class C tuned transformer feedback oscillator having a biasing capacitor 19 for the input electrode of a transistor 11, a circuit path 81, 82 is connected to a winding 80 which is coupled to an inductor 20 of a parallel resonant circuit 13 of the tuned transformer such that in operation the circuit 81, 82 provides a potential source of lower voltage than a terminal 14 to which the parallel resonant circuit is connected for discharging the bias capacitor 19 when the transistor 11 is in its non-conductive condition. The oscillator operates similar to Specification 1,308,284. The discharge from capacitor 19 is primarily through resistor 82, diode 81 and auxiliary winding 80 and only to a small extent through resistor 26. The auxiliary winding 80 and diode 81 provide an auxiliary positive rail of lower voltage than the terminal 14 which permits the capacitor 19 to discharge during alternate half cycles without excessive power dissipation. The rate of discharge is set by selecting the value of R82. In a modification (Fig. 2, not shown) a single winding (18a) is used in place of the feedback and auxiliary windings 18, 80, and the positive supply for discharging the biasing capacitor (19a) is provided by a diode (81a) which charges a storage capacitor (84). This discharge rate is adjusted by appropriate selection of the value of a resistor (83). In a further modification (Fig. 3 of the provisional Specification not shown) the lower end of auxiliary winding 80 is connected to 16 via a further winding (86) of the transformer 23. A transformer (Fig. 4, of the provisional Specification not shown) is constructed to provide leakage inductance between a winding section (A) containing windings 20, 18, 80 and a winding section (B) containing windings 24, 24a, 24b and (86) which takes the place of a ballast in a lamp circuit to limit the current through the discharge lamp 60. Windings 80 and (86) are connected in phase opposition so that in the pre-strike interval the discharge voltage across the capacitor 19 is reduced. When the lamp strikes the frequency of the oscillator increases and the output voltage of winding 86 falls to one third of its pre-strike value and the net discharge voltage for capacitor 19 is increased to maintain correct phasing at increased frequency.
Patent GB-359270-A (GB)
Title: Improvements in and relating to platen presses
IPC: B41F1/28
Filed: 1930-12-01
Abstract: 359,270. Printing-machines. ROCKSTROH-WERKE AKT.-GES., Heidenau, near Dresden, Germany. Dec. 1, 1930, No. 36214. Convention date, Dec. 27, 1929. [Class 100 (i).] Sheet-registering devices.-Sheets are registered on the platen a of a press by means of movable registering devices n, o which are moved in opposite directions to engage the side edges of sheets on the platen by means of a single operating-device which consists of a lever f acting on a projection e on one of the guide pins c, i of carriers b, k supporting the registering-devices. The lever f is connected by means of bar h which extends through the platen to the carrier k of the registering-device o. As shown, the carriers b, k are guided by rods c, i and also by other rods engaging apertures in the platen, but the guides for the carriers may be arranged on brackets d attached to each side of the platen, similar to the one which supports the lever f and guide pin c.
Patent GB-1503186-A (GB)
Title: Common-offset-distance seismic trace filtering
IPC: G01V1/36
Filed: 1975-09-03
Abstract: 1503186 Processing seismic traces MOBIL OIL CORP 3 Sept 1975 [23 Sept 1974] 36282/75 Heading G1G In multiple coverage exploration, the signal-tonoise ratio of seismic traces from source and receiver positions along a line of exploration are enhanced by gathering the traces into sets having common source-to-receiver offset distances, determining initial dip estimates for each set, smoothing the estimates and stacking the traces of each set along the apparent (smoothed) dips, with appropriate weighting coefficients. The thus enhanced traces are then processed by convention common depth point operations. The initial dip estimates are formed by obtaining sum-of-magnitude and cross-product signals for each of a plurality of different dip trajectory orientations at each of a plurality of different time locations on the traces of each set and deriving therefrom, by multiplying, a merit function for each orientation and time location of each set, the orientations giving the highest merit functions being selected as the initial dip estimates. Smoothing is by grouping initial dip estimates for adjacent time locations and replacing each estimate by the median value of the group. The weighting coefficients are related to the midpoints of equal areas under a normal distribution curve.
Patent GB-1498889-A (GB)
Title: Dental burs
IPC: A61C3/02
Filed: 1975-09-03
Abstract: 1498889 Dental burr DENTSPLY INTERNATIONAL INC 3 Sept 1975 [11 Sept 1974] 36367/75 Heading A5R [Also in Division B3] A dental burr 20 comprises a head, fixed to one end of a shank, and having longitudinally extending teeth 28 each with a sharp cutting edge 26, a flat cutting face 24, a relief surface 30 and a groove 22 to receive chips removed from a patients tooth in which the burr operates. The groove 22 is defined along one side by the cutting face 24 which also defines one side of the cutting edge 26 and extends from the edge radially towards the axis of the head, the opposite surface of each edge 26 being defined by the relief surface 30 which is convex in cross section and merges with an adjacent side surface 32 of groove 22 along a rounded ridge 34 substantially midway between successive edges 26. The helix angle of the teeth with respect to the burr axis is 10-30, preferably 12. The root surface of each groove extends radially a distance e ranging between 40% and 60% of the radial length f of the face 24, the dimension f being 20% to 30% of the radius g of the burr cutting head.
Patent GB-967951-A (GB)
Title: A process for the preparation of permono sulphuric acid
Inventor: MARSHALL JOHN GEOFFREY
IPC: C01B15/06
Filed: 1959-10-27
Abstract: Permonosulphuric acid is prepared by reacting gaseous sulphur trioxide with liquid hydrogen peroxide of at least 50% concentration. The molar ratio of sulphur trioxide to hydrogen peroxide may be 0.9 : 1 to 2.0 : 1 and the temperature may be 20-50 DEG  C.  The sulphur trioxide may be mixture with one or more inert gases containing up to 50% sulphur trioxide, e.g. 7% SO3 in air.  The gas may be introduced through a disperser with mechanical stirring, and where a mixture is used effluent gas may be recycled after charging with further SO3. The reactants can be introduced continuously in a counter current fashion and the product continuously withdrawn.  A portion of this product can be recycled by being mixed with the initial charge of peroxide.  Specifications 738,407 and 797,701 are referred to.
Patent GB-414578-A (GB)
Title: Improvements in concrete mixers
IPC: B28C5/20
Filed: 1933-12-29
Abstract: 414,578. Concrete mixers. ETABLISSMENTS RICHIER, 127<bis>, Avenue National, Charleville, Ardennes, France. Dec. 29, 1933, No. 36613. Convention date, April 10. [Class 86.] A trough for use with concrete mixers is provided with two blades inclined relatively to the axis of rotation and connected together at the centre of the trough by means of a sheet iron member 10, each blade comprising a solid portion 8 extended in a forward direction by a solid removable portion 9, Fig. 3, and in the backward direction by means of iron members 11 located in the same plane as the blade and parallel to its rear edge, the members 11 being secured to an iron member 12. The portions 8 and 9 are placed edge to edge and fixed separately to the wall of the trough by means of keys or the like so as to be removable therefrom. Auxiliary narrow blades 17, Fig. 1, inclined in the reverse direction to the solid blades, are arranged at the rear of the trough to throw back the materials towards the centre of the trough.
Patent GB-1344246-A (GB)
Title: Nitrile recovery process
Filed: 1971-08-04
Abstract: 1344246 Nitrile recovery process MONSANTO CO 18 Oct 1971 [17 May 1971] 36706/73 Divided out of 1341906 Heading C2C Aliphatic unsaturated nitriles, e.g. acrylonitrile, produced by ammoxidation of olefins, recovered in a process in which (a) the effluent from the ammoxidation reactor at an elevated temperature enters a quench column within which a first stream of the nitrile and other organic materials is separated from a second stream of ammonium salts, water, dissolved product nitrile and impurities, (b) the first stream exits the quench column overhead and is processed for recovery and purification of the nitrile, (c) the second stream exits the quench column bottom and is separated into an organic phase and an aqueous phase, and, (d) the aqueous phase is fed to a waste water column at an intermediate point therein in which column the nitrile is removed from the aqueous phase; and in which (c) the quench column is operated at a top temperature such that substantially all of the by-product polymer precursors are caused to be concentrated in the second stream.
Patent GB-1355737-A (GB)
Title: Container for fissionable material
IPC: G21F5/005
Filed: 1972-08-07
Abstract: 1355737 Shielded containers B G DUBOVSKY V K BOGATYREV G M VLADYKOV and V Y SVIRIDENKO 7 Aug 1972 36708/72 Heading B4Q A container in which fissile material may be stored or processed comprises a metal vessel 1 in the form of an elongate rectangular parallelepiped on the largest faces of which are provided rectangular shields 2. The shields 2 each comprise a layer 3 of a neutron-absorbent material, e.g. boron, cadmium or a rare earth element, located directly in contact with the vessel 1 and a layer 4 of a neutron-retarding material immediately upon layer 3. The layer 4 is provided with alternating projections 5 and depressions 6 facing layer 3 and is preferably formed of an hydrogen-containing material, such as polyethylene. The depressions 6 are filled with a porous material 7, e.g. a foamed plastics material. If the container is to be employed for processing a fissile material, involving heating or cooling, water is passed through metal pipes placed within cavities formed in the projections (Fig. 3, not shown). A container suitable for measuring the concentration of fissile material (Fig. 4, not shown) is provided with neutron detectors containing helium-3 mounted within the depressions. A further embodiment (Fig. 5, not shown) comprises a container adapted to deposit a fissile material in its vessel and to evacuate mother liquor. In this case one of the vessel walls and the adjacent neutronabsorbent layer are provided with perforations and the depressions communicate with the outside of the container so that the mother liquor may be evacuated through the perforations and the porous material in the depressions. The vessel has two inlets, one for air and the other for a solution or suspension of a fissile material.
Patent GB-1062650-A (GB)
Title: Improvements in or relating to gas-heated circulation water heaters
IPC: F23N1/08
Filed: 1963-09-18
Abstract: 1,062,650. Valves. JUNKERS & CO. G.m.b.H. Sept. 18, 1963 [Sept. 22, 1962], No. 36738/63. Heading F2V. A heat exchanger 12, Fig. 1, has a return pipe 11 and a supply pipe 13 whilst a burner 16 supplied with gas through a spring-loaded waterdeficiency valve 18 is operated by a diaphragm 22 with low and high-pressure chambers 23, 24 which are connected across a restriction 52 in a parallel flow branch 51 that includes a thermally-responsive cut-off valve 53. In a modification, the chamber 23 is connected directly to pipes 11 or 13; alternatively, this chamber may open to the throat of a Venturi in pipe 13. The restriction may be arranged in series with the heat exchanger. In another form; the parallel flow branch leads from the throat of a Venturi in pipe 13 and is connected to the chamber 23 only, the other chamber 24 being connected directly to the pipe 13. The cut-off valve may be of the thermal type.
Patent GB-948957-A (GB)
Title: Improvements relating to mass spectrometer ion sources
Inventor: GREEN BRIAN NOEL
IPC: H01J49/18
Filed: 1961-10-13
Abstract: 948,957. Ion sources. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Oct. 8, 1962 [Oct. 13, 1961], No. 36863/61. Heading H1D. The evacuable chamber of a mass spectrometer ion source is provided with a transparent viewing aperture protected by a movable shutter which prevents the obscuring of the aperture by contaminating material emitted by the sample being ionized. As shown, an ion source comprises a chamber 1 having a transparent cover plate 3, insulating supports 5 which project inwardly through the cylindrical side wall 2 of the chamber for holding rods 6 of the sample material, mechanisms 8 for moving the supports 5, a shield 11 having an aperture 12 through which the rods 6 may be inspected, and a shutter 13, e.g. of tantalum, movable by a mechanism 16 so that it can be located between the aperture 12 and the cover 3 to prevent contamination of the latter when the sample material is ionized by producing a spark between the electrodes 6. The mechanism 16 includes a cam 24 mounted on a shaft 23 and attached to a bar 14 carrying the shutter 13, so that rotation of a hand wheel 25 moves the bar 14 into and out from the chamber 1. A mechanism including a magnet for moving the shutter 13 may replace the mechanism 16. In another embodiment, Figs. 2 and 3 (not shown), the shutter is pivoted within the chamber 1 and can be rotated into its protecting position.
Patent GB-985590-A (GB)
Title: Improvements in thermostatically controlled gas valves
Inventor: MCGOWAN ERIC
IPC: G05D23/12
Filed: 1962-09-28
Abstract: 985,590. Valves. BRITISH THERMOSTAT CO. Ltd. Sept. 20, 1963 [Sept. 28, 1962], No. 36887/62. Heading F2V. [Also in Division H2] A gas valve and one or more electric switches are arranged in combination as a single unit, and are acted upon by a common thermostatically-operated lever. A switch and thermostat housing 1 and a valve housing 2 are joined together. In the housing 1, a bellows capsule 3 is joined by a tube 4 to a thermostatic sensing unit, and movement of the capsule 3, acting against spring 7, with its adjusting set-screw 8 causes movement of lever 6, pivoted at 10. In the housing 2 is a gas inlet 13 and an outlet 14 whilst a piston valve 15 movable against a spring 18 by the lever 6 through an adjusting screw 11 controls the inlet. The push rod 19 passes through a guide 20 and a sealing diaphragm 21. Another trimming screw 12 acts on an electric switch 22. In a further embodiment, several switches may be included, the associated trimming screws being adjusted if required to operate one before the other and a further spring acting on the arm to reduce movement due to a given temperature change.
Patent GB-1191746-A (GB)
Title: Improvements in or relating to Hose Connectors
IPC: F16L33/207
Filed: 1967-08-11
Abstract: 1,191,746. Hose couplings. ALFRED TEVES G.m.b.H. 11 Aug., 1967 [1 Dec., 1966], No. 36929/67. Heading F2G. A socket for a pressure hose comprises a connection member 17 and a deformable sleeve 12 and has a bore stepped to give three successively smaller diameters, the largest diameter being within the sleeve and for receiving the hose which is gripped when the sleeve is deformed radially inwardly, and an inner sealing tube 11 forced into the intermediate bore and having a chamfered end 14 in contact with the nose of the step 13a to the smallest bore, the tube also extending within the sleeve and arranged to fit within the hose. The seating of the tube may be enhanced by caulking 19 or soldering.
Patent GB-1074421-A (GB)
Title: Halogenation of alkyl substituted phenylacetates
IPC: C07C69/157
Filed: 1964-09-09
Abstract: Phenyl acetates substituted in the nucleus with at least one methyl group are converted into halogen-methyl derivatives by halogenation at a temperature of at least 70 DEG  C. in the presence of an organic azo compound as catalyst. The catalyst has the general formula (R1)R11C(X)-N : N(X)CR11(R1), in which X is a nitrile, carboxylic acid or carboxylic ester group, R1 is a hydrocarbon or alkoxyhydrocarbon radical and R11 is an alkyl group of 1-6 carbon atoms, or R1 and R11 together form a cyclic radical.  The preferred catalyst is a ,a 1-azobisisobutyronitrile, but others are specified also.  The preferred halogenating agents are chlorine and bromine and a solvent may be present, carbon tetrachloride being preferred. Examples are given of the chlorination of mtolyl acetate to produce the corresponding mono-, di- and tri-chloromethyl compounds. Reference is made also to the chlorination of xylyl phenyl acetates to produce 2,3-, 2,4-, 2,5-, 2,6-, 3,4- and 3,5-tetrachlorodimethyl phenyl acetates, and to the halogenation of the methyl groups of a trimethyl-substituted phenyl acetate.
Patent GB-362671-A (GB)
Title: Improvements relating to dyeing and like machines
IPC: D06B3/26
Filed: 1930-12-11
Abstract: <PICT:0362671/IV/1> In dyeing and like machines in which fabrics in endless rope form are plaited into a vat or bath for wet treatment by means of an elliptical wince and raised out of the vat by a circular wince, the circular wince 1 and the elliptical wince 4 are intergeared by a chain drive 7 to ensure uniform surface speed of the winces, and the relative positions of the axes of the winces are adjustable to compensate for the elliptical shape of the plaiting wince and its chain wheel, so as to maintain uniform tension in the chain and in the fabric.  In the form shown, the axis 5 of the wince is mounted on levers 8 pivoted at 9 and reciprocated by a rod 12 connected to an eccentric 13 on the axis 2 of the wince 1.  The rod 12 may also be moved by appropriately designed cam tracks or cams.
Patent GB-1097320-A (GB)
Title: Preparation of tertiary amines
Filed: 1965-09-01
Abstract: A process for the preparation of a tertiary amine comprises the step of heating in a closed system under pressure an alkyl sulphate, the hydrocarbon radical of which has from 6 to 22 carbon atoms, with a secondary amine in the presence of an inorganic alkaline earth metal or alkali metal base and at a reaction temperature in the range of 100 DEG  to 200 DEG  C.  In examples: a mixture of amines is obtained by heating sodium lauryl sulphate and aqueous dimethylamine in the presence of caustic soda (1); in similar processes sodium hydroxide is replaced by potassium hydroxide (2) and the sodium lauryl sulphate is replaced by the potassium salt.
Patent GB-965543-A (GB)
Title: Spectrograph
Inventor: MENZIES ALEXANDER CHARLES GEOR
IPC: G01J3/18
Filed: 1959-11-04
Abstract: 965, 543. Grating spectrographs. HILGER & WATTS Ltd. Nov. 2, 1960 [Nov. 4, 1959], No. 37435/59. Heading G2J. A spectrograph has an entrance slit 2, a concave grating 1 and one or more exit slits for the spectral lines, there being disposed behind said slits photomultipliers 11. In order to photograph the spectral lines, the entrance slit 2 is made movable so that the focus of the spectral lines may be shifted towards the grating, for example, to 7 where means may be disposed for locating the photographic material. Such means may be removable or can remain in position when the spectrograph is used for direct reading.
Patent GB-861920-A (GB)
Title: Improvements in and relating to vehicular apparatus, such as power lawnmowers, incorporating an internal combustion engine with a manually actuatable starter device
IPC: F02B63/02
Filed: 1959-11-06
Abstract: 861,920. Turning gear. MOTO-MOWER Inc. Nov. 6, 1959 [Nov. 19, 1958; July 22, 1959], No. 37685/59. Class 7(5). Vehicular apparatus, such as a power lawn mower, has an axle 28, Fig. 2, with ground engaging wheels and an engine 18 providing a source of motive power and having starting means comprising a spring 56 wound up on manual movement of the vehicle to cause rotation of the axle 28, the spring 56 being manually releasable to apply engine starting torque. As shown, the spring 56 is connected at one end to a housing 44 and at the other end to the shaft 40 of a pulley 108 driving by a belt 110 a pulley 112, which powers the engine crank-shaft 22 via a spring- loaded pawl 116 and ratchet 124. The shaft 40 has fast therewith a helical gear 66 meshing a like gear 74 rigid with a sprocket, which is connected by a chain 100 to a sprocket 96 fast with a gear 94, rotatable on a shaft 92 carried on two parallel arms 86, movable about the axis of the gear 74. When the carrier 86 is moved downwardly by operation of a Bowden cable 104 the gear 94 meshes a gear 34 on the axle 28 and the spring 86 is then tensioned by manual movement of the vehicle, subsequent raising of the carrier 86 allowing the spring 56 to unwind and drive the crank-shaft 22. A second embodiment is shown in Figs. 5, 6 and 9. A tapered drum 78<SP>1</SP> is rotatably mounted on wheel axle 181. A clutch mechanism consisting of four projections 821 in axle collar 801 fitted into four corresponding indentations in drum 781 connects the drum to axle 181. A helically coiled spring 881 tends to keep the drum to the left in engagement with collar 801 but by means of yoke 98<SP>1</SP> mounted on shaft 901, pivoted at 921, and handle 1001 the drum may be moved to the right and thus become free to rotate independently. A cord 66<SP>1</SP> connected to drum 781 and passing over pulley 1081 is coiled round and attached at its end to pulley 64<SP>1</SP> which is mounted on a shaft 361 coaxial with the engine crank-shaft 241, on which is mounted the cutting blade 261. A spring 34<SP>1</SP> is connected to the shaft 361 the other end being connected to cover 321. A pawl 521, spring 561, and ratchet teeth on cup 601 allow a one-way drive to the shaft 241. To start the engine the vehicle is pushed forwards with the drum 781 in engagement with collar 801, thus winding cord 661 on drum 78<SP>1</SP> and tensioning spring 341. Drum 78<SP>1</SP> is then made independent by movement to the right by handle 100<SP>1</SP> and the spring 34<SP>1</SP> winds the cord 661 back on pulley 641, at the same time providing a starting torque through ratchet 521 and the teeth in cup 601 to the shaft 241. A third embodiment, Fig. 13 (not shown), has the cord pulley, spring, pawl and ratchet toothed cup-shaped piece all mounted below the engine.