baber/WOPTO huggingface dataset:
Patent GB-576592-A (GB)
Title: Separation of hydrocarbons
IPC: C07C7/11
Filed: 1943-11-03
Abstract: Olefins are separated from mixtures with more saturated hydrocarbons by extracting with a preferential solvent consisting of a carboxylic acid anhydride, a carboxylic ester of a keto alcohol or a polycarbonyl compound wherein the carbon atoms of the carbonyl groups are adjacent or separated by one or more carbon atoms which are devoid of hydroxy groups and with the carbon atoms of the carbonyl groups form an unbroken acyclic carbon chain, and separating the undissolved hydrocarbons from the liquid solution of the olefins. The separation of narrow boiling mixtures predominating in C4 hydrocarbons, of ethylene from ethane, propylene from propane, n-butylene from a butane, pentadienes from amylenes, and pentadienes or amylenes from iso- or n-pentane is referred to.  Solvents specified are anhydrides such as acetic, propionic, butyric, butyric-acetic, acetic-propionic, n- and iso-valeric, acetic-isovaleric, di-acetyl, di- and tetra-halo-diacetyls, acetyl propionyl, acetyl acetone, halo-acetyl acetones, methyl propyl diketone, propionyl acetone, acetonyl acetone, dipropionyl acetyl isobutyryl, methyl acetyl acetone, butyryl acetone, propionyl butyryl, isobutyryl acetone, acetyl isovaleryl, methyl acetyl propionyl methane, ethyl acetyl acetone, pentan- and heptan-triones, formates and acetates of hydroxy acetone, diacetone alcohol, esters of keto acids such as methyl and ethyl aceto-acetates and levulinates, and esters of polybasic acids such as diethyl oxalate, malonate, succinate, and maleate, methyl ethyl oxalate, and dimethyl malonate.  The mixture to be separated may be extracted while in vapour or liquid phase. In ordinary extraction, the temperature is preferably below the boiling point of the solvent, but above the condensation temperature of the most readily condensible constituent of the mixture which is extracted as a vapour.  Extractive distillation is preferably operated at superatmospheric pressure. The solubilities of butadiene and butylene at 20 DEG  C. in several of the specified solvents are given.  In an example, acetic anhydride is fed to the top of a column kept at about 20 DEG  C., a vapour mixture of 40 per cent butadiene and 60 per cent butylenes being fed near the centre.  Bottom reflux is provided, and the fat solvent at the bottom yields over 98 per cent pure butadiene.
Patent GB-1120657-A (GB)
Title: Magnetic tape reproducing device
Inventor: HUBER WILLIAM BABLER
IPC: G11B15/02
Filed: 1967-04-20
Abstract: 1,120,657. Cassette-type tape players. MOTOROLA Inc. 20 April, 1967 [22 July, 1966], No. 18268/67. Heading G5R. A playback head 22 is adjusted vertically to co-operate with different tracks on the tape by means of a cam follower 24 and a cam 14 having a plurality of cam surfaces 20 each associated with a different tape track, the mounting for the head 22 including a pantograph device 60 which keeps the face of the head parallel to the tape. The cam 14 may be rotated manually by means of a screw 48 or automatically at the end of each track by a solenoid actuated through a conductive strip on the tape. A screw 61 provides azimuth adjustment of the head 22. A thrust bearing on the capstan shaft (Fig. 5, not shown) limits axial movement of the shaft.
Patent GB-1347630-A (GB)
Title: Net-making loom
IPC: D04G1/00
Filed: 1972-04-20
Abstract: 1347630 Net-making loom ZANG ETABS 20 April 1972 [24 June 1971] 18322/72 Heading D1C In a net-making loom in which sets of first and second threads 5, 10 a knotted by rows of first and second needles 1, 2 a bar 11 is displaced to cover the points of the first needles while the knots are tightened. A loop 4 of each first thread is formed around pairs of needles. Hooked needles 6 draw loops 7, 7a of the thread over bobbins 9 containing second threads 10. As the first threads are pulled to return the loops 7, 7a and tighten the knots, threads 10 are pulled through the loops 4. The bar 11 is swung down about its axle, so that holes 12 or slots cover the needle points. Velvet 22 covers the front of the bar.
Patent GB-1526534-A (GB)
Title: Drain digging machines
IPC: E02F5/10
Filed: 1976-05-05
Abstract: 1526534 Drain digging machines G MILES & SON Ltd 2 May 1977 [5 May 1976 9 Sept 1976] 18332/76 and 37319/76 Heading A1B A mole plough is mounted on the end of a beam 10 which in use is towed behind a tractor with skids 18, 40 on the beam in contact with the ground. Transport wheels 56 are carried on legs 44 of a transverse frame which is pivotally connected to the main beam 10 about an axis parallel to the length of the beam by means of a hinge 50, and about a horizontal axis perpendicular to the length of the beam by means of a hinge 46. The position of the frame about the axis of the hinge 46 is adjustably controlled by a hydraulic ram 62, 68.
Patent GB-1166015-A (GB)
Title: Improvements in or relating to Pivotable Windows
IPC: E06B7/18
Filed: 1968-04-18
Abstract: 1,166,015. Pivotable windows; glazing; releasable fastenings. ETAB AGURA. 18 April, 1968 [21 April, 1967; 22 April, 1967], No. 18368/68. Headings E1J, E1R and E2A. In a pivotable window in which the sash is locked in the closed position by a semicircular cylindrical bar 9 rotatable about a horizontal axis to move the bar from an unlocking position in which it is wholly accommodated within a longitudinal recess 8 in one frame (e.g. the fixed frame) into a locking position (as shown) in which the bar 9 is partly accommodated in a recess 7, 8 in each adjacent frame member, each recess 8 occupied by the bar 9 in the unlocking position is formed with locating faces 10, of 30-degrees arc, matching the radius of the bar and terminates at a shoulder 11 and the bar has a longitudinal rib 14 to engage one or other shouder 11 in the locking and unlocking positions respectively and a sealing strip 13 is provided to form a stop against which the flat surface 15 of the bar contacts in the locking position of the bar, and the strip 13 can be prestressed by a lip 20 to exert pressure on the bar 9. A stop flange 28 may be provided for the face 15 to abut. The recess 7 may be lined with rubber or plastics material in a frame of metal or harder plastics than the lining. Single or double glazing may be mounted in the sash by removable glazing strips 23, Fig. 5 which has teeth 29 to be engaged by teeth 30 on tapered strip 28 which fixes sealing strips 31 against the glazing 21. The recess 6 in the sill of the main frame may be used to collect condensation water &c. from the window and which is drained away through tubes 17.
Patent GB-572199-A (GB)
Title: Improvements in or relating to clip fastening devices
IPC: F16B5/06
Filed: 1942-12-28
Abstract: 572,199. Clips. MILLS, H. E. Dec. 28, 1942, No. 18409. Convention date, Dec. 24, 1941. [Classes 44 and 65 (ii)] In a clip device particularly for securing together apertured plate-like members such as sheet-metal panels, flanges and the like, and of the kind in which a V-form member is adapted to embrace the plate, &c., one of the limbs having an inwardly embossed or stamped out projection or offset adapted to snap into the aperture, the edge of the aperture and of the offset are disposed so that the offset will not disengage from the aperture under force applied parallel to the plane of the plate, no matter in what direction such force is applied. The other limb of the clip may have a similar off-set or may be otherwise formed to hold a second plate, or flange. As described, the aperture is circular and the off-set comprises a pair of oppositely directed segmental or semi-circular lugs 20, which together fit the aperture. The lugs are off-set from and parallel to the plane of the limb and plate, so that the edges of the aperture and lugs are normal to said plane. Figs. 1, 2 show the lugs 20 formed from limb 12 of the clip which is applied to the apertured flange 18. The other limb is slit to provide marginal tongues the free ends 30 of which are bent at right-angles to overlie a plate 34, and a central tongue 32 which is outwardly inclined so that its free end abuts against the lower face of the plate. The end of limb 12 is outwardly flared at 28 to facilitate application. A simple U-form of clip having parallel limbs each of which has inwardly directed off-sets as described, the clip embracing the marginal portions of superposed flange and plate and engaging registering apertures. An S-form clip is also described for connecting overlapping marginal portions of two plates, the outer limbs having inwardly directed off-sets. Fig. 9 shows a form for connecting nesting flanges of articles 80, 82, limb 84 having an inwardly directed off-set, whilst limb 90 which enters the space between the flanges is outwardly bowed and has an outwardly directed off-set. Fig. 12 shows a pair of clips 100, 102 connected together by a pivot-pin 104 so that the flanged member to which the clips are respectively applied are hingedly connected.
Patent GB-698472-A (GB)
Title: Improvements in or relating to tablet feed hoppers
IPC: B65G47/00
Filed: 1951-08-03
Abstract: 698,472. Hoppers. IMPERIAL CHEMICAL INDUSTRIES, Ltd., and ALDRED, L. Aug. 3, 1951. No. 18411/51. Class 78 (i). Tablets are discharged by gravity from hopper 2 along passage 4, the discharge being regulated by oscillation of brush 5, the latter being pivoted at 6 and agitated by crank 8. The passage 4 may be subdivided and each subdivision may have a bottom which is flat or inclined and the height of which may be varied by a screw. Also, brush 5 may swing on parallel links instead of pivot 6.
Patent GB-440203-A (GB)
Title: Improvements in the manufacture of nitrocellulose
IPC: C08B5/02
Filed: 1934-06-21
Abstract: In the production of nitrocellulose under atmospheric conditions such that the natural humidity of the air exceeds 5 grains of water per cubic foot, the nitrating acid is separated from the nitrocellulose by means of a centrifuge and the atmosphere in contact with the acid-wet material is maintained at a humidity less than 5 grains per cubic foot.  The air supplied to the centrifugal separator is de-humidified and if desired the quantity of air supplied may be less than usual.  Instead of air, an inert gas such as dry carbon dioxide may be supplied to the centrifugal separator.  Air or other gas of low moisture content may also be used to remove acid fumes from the nitrating dippers and the acid-wet nitrocellulose may be maintained in air of low moisture content right up to the point where it is drowned in water.  The air or other gas may be dehumidified by passing it over calcium chloride, silica gel, or concentrated sulphuric acid, or it may be cooled below its dew point to cause elimination of moisture before being led into the centrifuge.  The process results in a product of uniform properties which does not give rise to graining when dissolved in organic solvents; there is less denitration and a larger yield.  The product is particularly suitable for the manufacture of artificial leather.  In examples, cotton linters are immersed in nitrating acid and then transferred to an aluminium centrifuge.  Air or carbon dioxide is introduced through the cover of the outside casing of the separator, carrying the acid fumes through an outlet at the side of the casing.  The charge is quenched and then stabilized by boiling in water.  No graining effects are produced when the humidity of the air is less than 5 grains per cubic foot but graining is bad when the humidity of the air is 7--9 grains per cubic foot.  In another example part of a charge of nitrocellulose is centrifuged in the presence of air saturated with water vapour due to the opening of steam pipes in the room, and the other part is treated with air containing 3,4 grains of water per cubic foot.  In the first case the product shows bad graining while in the second case graining is absent.  Specification 291,082, [Class 2 (ii)], is referred to.
Patent GB-650594-A (GB)
Title: Improvements in or relating to detector circuits for amplitude modulated carrier waves
Inventor: WATTON WALTER LESLIE
IPC: H04N5/455
Filed: 1948-07-09
Abstract: 650,594. Valve circuits for radio reception. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 9, 1948, No. 18440. [Class 40 (v)] Distortion is prevented in a diode or like detector circuit by making the variation of amplitude and phase with frequency in either direction from the carrier frequency in the input circuit the same as the corresponding variation as the frequency varies from zero in the detector load circuit. The detector load may comprise resistance R3, Fig. 1, and shunt capacity C3, the tuned input circuit L, C1 being adjusted to have a similar amplitude and phasevariation characteristic. The load circuit may also include inductance L3, Fig. 2, a corresponding response being obtained in the input circuit by means of inductance L2, capacity C2 and resistance R2 connected in series across a tap on the inductance L1.
Patent GB-117567-A (GB)
Title: An Improved Method and Apparatus for Controlling and Pumping Oil Wells.
Inventor: STIRLING ROBERT
IPC: F04F1/18
Filed: 1917-12-12
Abstract: 117,567. Stirling, R. Dec. 12, 1917. By aerating a s c e n d i n g column.-In oil wells, particularly those in which oil is found in loose sand with gas under pressure, the drilling-tube B has inlets E adapted to be closed by an internal sleeve F to prevent the entrance of oil or sand until a suitably proportioned discharge pipe G is inserted ; the sleeve is then moved preferably by the discharge pipe to uncover the perforations. A rotary sleeve may be employed instead of an axially-movable sleeve as shown. The discharge pipe may have a nozzle K, to which air may be supplied through the tube B to assist the gas to raise the oil. When a well is choked by a sand plug, a drilling tube fitted as described may be lowered through the plug. Where soft sand is encountered, the lowering of the tube B is effected by moving the sleeve F to uncover the perforations E and admitting air to the nozzle K so as to maintain a discharge of liquid, which liquid removes the sand.
Patent GB-1393962-A (GB)
Title: Electrical forked contact assembly for receiving a contact  blade
IPC: H01H1/54
Filed: 1972-04-20
Abstract: 1393962 Switch contacts; fuse contacts BO WENNERSTEN 20 April 1972 [21 April 1971] 18454/72 Heading H1N An electrical forked contact assembly comprises a pair of contact members each having a first elongate part 1, 4, a second elongate part 2, 3, extending from one end of said first part at right angles thereto in a predetermined direction 5, and a slot which extends along each elongate part of that contact member, the said second parts being parallel to each other so that, in use, a contact blade, of an isolating switch or a blade fuse 6, for example, can be inserted into the slots to form a bridge by movement in said direction 5, and forces exerted by a current passing from one contact member via the blade to the other contact member act on the blade mainly in the direction 5. Pins 7, 8 limit the insertion of fuse 6. The contact members may have third elongate parts (1<SP>1</SP>, 4<SP>1</SP>, Fig. 3, not shown) forming U-shapes with the first and second elongate parts but since these are relatively distant from the blade the forces opposing its entry are small.
Patent GB-221781-A (GB)
Title: Improvements in and relating to steam and gas turbines
IPC: F01D1/16
Filed: 1924-08-05
Abstract: 221,781. Erste Br³nner Maschinen- Fabriks-Ges. Sept. 15, 1923, [Convention date]. Axial-flow type; rotors.-In a combined drum and disc wheel turbine the last stages of the turbine are constructed as a disc wheel section d forming a direct continuation of the drum section e. The Figure shows a construction in which the drum and discs together with the shaft a, b are made in one piece. The end a of the shaft may, however, be bolted to the combined rotor which may itself be divided transversely. The shaft may be hollow.
Patent GB-994111-A (GB)
Title: Apparatus for delivering a liquid into a receptacle
Inventor: MASON JAMES ROWLAND
IPC: B67C3/26
Filed: 1963-05-10
Abstract: 994,111. Bottling. VICKERS-ARMSTRONGS (ENGINEERS) Ltd. May 7, 1964 [May 10, 1963], No. 18725/63. Heading B8T. Apparatus for the supply of liquid to a receptacle comprises a control head 4 with liquid delivery means 11, 12, 15 biased towards the head, the latter having a first control means with an active position in which the delivery means is displaced from the head and its liquid outlet is opened, and an inactive position in which the delivery means is urged towards the head and the outlet is closed, and a second control means which, when liquid is being discharged, is activated in response to the liquid level in the receptacle whereby the first control means is caused to take up its inactive position. The delivery means consists of concentric tubes 11, 15, to the annular space between which liquid is fed by a pipe 12. The upper end of the tube 11 is attached to a piston 6 slidable in a housing 1, and the upper end of the tube 15 is attached to a piston 13 slidable in the piston 6. In the non-filling position the tubes are urged upwardly by springs 7 and 14. The head includes a low pressure air supply continuously fed through the tube 15 via passage 22 and a tube 18, and a high pressure air supply pneumatically controlled by an arrangement of valves which feeds a cavity 8. In the active position of the control means, high pressure air is fed to the cavity whereby the pistons and their attached tubes are forced downwardly, and the mouth of the receptacle to be filled is contacted by a mouthpiece 60 telescopically slidable on the tube 11 and urged downwardly by a spring 59. The tubes enter the receptacle mouth until a sleeve 17 contacts the piston 6 whereupon the piston 13 and its tube 15 moves down a further distance against the spring 14 until a valve 16a, 16b opens the liquid outlet. The low pressure air from the tube 15 passing into the receptacle escapes from between ribs on the mouthpiece 60. When the liquid reaches the level of the lower end of the air tube a back pressure is built up in the tube and its supply passageways, which results in the operation of valves to cut off the high pressure air to the cavity, whereupon the liquid delivery means returns to its original position. The control means of the head 4 includes a shuttle valve 33 with interconnected blocks 33a, 33b and a shuttle valve 35 slidably disposed in a chamber 25, which are moved pneumatically to control the high pressure air supply to the cavity 8. High and low pressure air passages, and exhaust passages connect with the chamber 25, and additional manually operable valves are conrected in the high pressure lines. The back pressure set up when the receptacle is filled acts on a diaphragm which closes a nozzle emitting high pressure air, whereupon that air pressure is directed into the chamber 25 at the appropriate inlet to move the shuttle valve 33 and close the passage 24 supplying the cavity 8.
Patent GB-1389667-A (GB)
Title: Mains safety isolating device
IPC: H02H9/04
Filed: 1971-06-03
Abstract: 1389667 Earthing guitars and microphones C F McCRORY 2 June 1972 [3 June 1971] 18736/71 Heading H4J An electric guitar, microphone or other electro-acoustic transducer device providing an electrical output is connected to the earthed primary winding of a transformer, the secondary winding of which is connected to the primary winding of a second transformer having a separately earthed secondary winding. This earthed secondary is connected to a mains powered amplifier and loud-speaker. The two separate earths provide safety to a performer if, for example, a fault develops and the amplifier housing becomes live. An isolating device comprises a transformer T 2 , the primary winding a of which is connected to a socket I for the plug of a guitar or microphone. Winding a 1  and preferably the transformer core e, are earthed, heads 4, 5 from the transformer secondary b (which is of lower impedance than winding a) are connected to the primary winding c of transformer T 1 . Windings b and c are matched. A secondary winding d, of higher impedance than winding c is connected by conductors 8, 9 to an output socket O which receives a plug of a mains powered amplifier. Conductor 9, and preferably the transformer core f, are earthed separately from winding a. One or both transformers T 1 , T 2  may have three windings, any further secondary winding of transformer T 1  being earthed separately from conductor 2. A potential divider comprising two balanced resistors R 1 , R 2  is connected to earthing point E 1 . A hum rejection circuit comprising resistor R 3  and capacitors C 1 , C 2  is provided.
Patent GB-649657-A (GB)
Title: Improvements in or relating to spring assemblies for seats, mattresses and the like
IPC: A47C7/34
Filed: 1948-07-13
Abstract: 649,657. Spring upholstery. ULLMANN, L., and CHISWELL WIRE CO., Ltd. July 13, 1948. No. 18810. [Class 52 (iv)] Each upholstery spring 10 in an assembly is mounted on a separate short steel strip 11 the aligned ends of the strips being connected by transverse helical wires 12. The strips 11 are directly connected to the frame 17 at one end of each row, the strip at the opposite end being connected to an angle bracket 19 by a tension spring 18.
Patent GB-1320252-A (GB)
Title: Forging machine
IPC: B21K1/44
Filed: 1971-06-03
Abstract: 1320252 Forging machines NATIONAL MACHINERY CO 3 June 1971 [26 June 1970] 18851/71 Heading B3H A multi-die forging machine comprises a main frame 10, an auxiliary frame 18 pivoted to the main frame about an axis 21 and a slide 22 movable on the auxiliary frame 18 and carrying workpiece gripper assemblies to transfer workpieces between the dies. The frame 18 is pivoted against the action of a fluid spring 124 by a cam 111, Fig. 4, on a cam-shaft 26 which also has a set of cams 82, Fig. 5, which each vertically reciprocate an operating rod of each of the gripper assemblies 23, Fig. 6, respectively by means of a pivoted forked member 102 which acts on the rod and moves it through a rotatable sleeve 31 against the bias of a fluid spring 41. The gripper assemblies are mounted on trunnions 24 of the slide 22. The sleeves 31 each carry a pair of pivoted fingers 47, 49 actuated by the downward movement of the rod which contacts extension arms 77, 78 of the fingers. The upper part of each sleeve carries a gear segment 39, which engages a fixed rack (57), Fig. 1 (not shown), on the auxiliary frame 18 so that the finger assembly is rotated as the slide moves to reverse a workpiece before it enters the next die. Each sleeve 31 can be locked against rotation if desired and the segments are then rotated to an inoperative position. An alternative gripper assembly, Fig. 8 (not shown), has wider spaced fingers 161, 162 for larger workpieces. The fingers are urged towards each other by a fluid spring 163 and have no means of rotation. The slide is reciprocated by a separate cam drive 131, Fig. 9a, through a rack and pinion 143 and an overload clutch 142, 144 to a crank arm 147 connected by a rod 156 to the slide. The rack and pinion are housed at one end of a fluid spring 138 which is pivoted to the machine frame at the other end 141. The spring and the rack and pinion can thus be moved away from the clutch 142, 144 against spring 148 bias if overload occurs due to jamming of the slide. The slide is easily removed for replacement by simply pivoting the frame 18 upwards. In operation the cam drive 131 for the slide and the cam-shaft 26 for the auxiliary frame 18 and the operation of the fingers are synchronized with the machine cycle so that between forging strokes the fingers grip a workpiece ejected from the die, the frame 18 pivots to move the workpiece away from the die and the slide is moved to bring the fingers in line with the next die. The frame 18 then pivots to bring the workpiece nearer to the die and the fingers open. The fingers may rotate the workpiece during transfer.