baber/WOPTO huggingface dataset:
Patent GB-1078895-A (GB)
Title: Improvements in and relating to semi-permeable membranes useful as battery separators
Inventor: LARSEN DONALD WAYNE
IPC: H01M50/497
Filed: 1964-08-06
Abstract: Semi-permeable membranes having an essentially flat surface consist essentially of a microporous polyolefin having a standard load melt index of 0.  The polyolefin may be a blend of high molecular weight polyolefin having a standard load melt index of 0, and a low molecular weight polyolefin having a standard load melt index of 0.1 to 5.  The membrane may consist of a homogeneous mixture of 8-100 volume per cent of polyolefin, 0-40 volume per cent of a substantially inert solid plasticizer, and 0-92 volume per cent of an inert filler.  The membrane may be made by blending a composition comprising 5-65 volume per cent of polyolefin having a standard load melt index of 0, 5-60 volume per cent of an inert filler, and at least 30 volume per cent of a plasticizer, forming the composition into a web having at least one essentially flat surface, and extracting from the web a portion of the filler or the plasticizer or both, to form a porous sheet or film.  The web may be formed by, e.g., extrusion, calendering, or moulding. Specified polyolefins are polyethylene, polypropylene, polybutene, and copolymers thereof.  The filler may be soluble or insoluble in water, and may be inter alia a metal oxide or salt, glass, wood, clay, or cement.  Many fillers are specified. The plasticizer, which may also be soluble or insoluble in water, may be, inter alia, an organic ester, a phosphate ester, a hydrocarbon, a low-molecular weight synthetic polymer, a natural oil or resin, or a glycol.  Many are specified. Extraction of the plasticizer and/or filler to form the porous web may be effected in one or more stages by treating the web with one or more solvents for the plasticizer or filler, e.g. chlorinated hydrocarbons, water, alcohol, acetone, acids or alkalis.  The microporous films or sheets which are, e.g., 1-50 mils thick and have a pore diameter generally less than 1 micron, are used as battery separators.  In one embodiment, the films or sheets are formed with ribs thereon, the ribs being integral with the web, or subsequently attached to the web (see Division Hl).  In a typical example, a composition containing polyethylene, silica and petroleum oil is extruded to form a film which is then immersed in petroleum ether to extract the petroleum oil, and form a microporous film.
Patent GB-807989-A (GB)
Title: Method of preparing molten magnesium-base alloy for casting
Inventor: ROBERSON KEITH
IPC: C22C1/02
Filed: 1957-10-14
Abstract: Molten magnesium-base magnesium-zinc-zirconium alloy is prepared for the production of castings free from excessive segregation of zinc-zirconium compound by alloying the zinc and zirconium with molten magnesium at a temperature of 1210-1450 DEG F., allowing the alloy to settle while maintaining the temperature in the range 1200-1275 DEG F. and separating the supernatant metal while still maintained within this temperature range.  The separated supernatant metal is preferably held in aquiescent state within the temperature range 1200-1275 DEG F., with a temperature fluctuation of not more than 50 DEG F., before being transferred at a temperature in the same range, to a casting mould.  The Specification refers to the production of alloys containing 1.0-9.0 per cent by weight of zinc and 0.1-0.9 per cent by weight of zirconium.  Zirconium may be introduced into the molten magnesium as the metal or as a reducible salt such as the tetrachloride mixed with an equal weight of potassium chloride.  Specification 667,252 [Group XXII] is referred to.
Patent GB-1399332-A (GB)
Title: Exhaust gas silencer for motor vehicles
IPC: F01N1/16
Filed: 1971-07-08
Abstract: 1399332 Exhaust gas silencers M V HINDERKS 10 July 1972 [8 July 1971]  32229/71 Heading F1B Exhaust gas silencer comprising a chamber of C- shaped cross-section in the direction of flow of the exhaust gases, the chamber having an exhaust gas inlet, an elongated gas discharge aperture formed by the open end of the C-shaped cross-section positioned remote from the inlet and a member spaced from an external surface of the chamber and forming therewith a passageway the cross-sectional area of which progressively decreases towards the discharge aperture and terminates adjacent thereto. The silencer comprises a metal sheet 21 bent to form upper and lower surfaces of a chamber and welded or brazed to end plates 8. Stiffening recesses 12 are riveted together at 23 near the discharge opening. A gas inlet stub 19 is provided. A further plate 20, having a stiffened leading edge 7 is secured beneath the chamber and forms with the chamber a duct 6. Movement of the vehicle forces air into the duct, the air mixes with the exhaust gas to reduce its temperature. The exit velocity of the gases is reduced by the provision of the elongated discharge opening which has a greater area than a conventional tail pipe. In an alternative construction, the trailing edge of the upper surface is formed as a part which is hinged to the remainder of the upper surface and can be swung down to close the discharge opening, as may be necessary on an amphibious vehicle.
Patent GB-800318-A (GB)
Title: Improvements in or relating to slurry inlet means in strainer apparatus
Inventor: JALKANEN MATTI JOHANNES
IPC: D21D5/04
Filed: 1956-10-23
Abstract: 800,318. Filters for liquids. RAUMAREPOLA OY. Oct. 23, 1956, No. 32259/56. Class 46. In a straining tower 1 to which fibrous slurry is fed from an inlet 10 and a rotary scraper 4 is spaced from and above a filter screen 2 to provide a feed passage 13 there-between, there being a distributing duct 9 surrounding the filter screen 2, the bottom of the distributing duct 9 is lower than the screen to provide a setting chamber for heavy metal &c., particles and the top of the duct is higher than the screen. The inlet 10 or inlets if there are more than one, deliver tangentially to the duct 9 and arms 8 on the scraper 4 direct the slurry on to the screen 2 from which the deposited fibrous matter is removed by scraper blades 5. The floor of the duct 9 slopes downwards to an outlet 15 and an air vent 17 is provided in the upper part of the duct.
Patent GB-341950-A (GB)
Title: Improvements in or relating to methods of and means for use in lasting shoes
IPC: A43D75/00
Filed: 1929-10-24
Abstract: 341,950. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., Belgrave Road, Leicester.-(United Shoe Machinery Corporation; 205, Lincoln Street, Boston, U.S.A.) Oct. 24, 1929, No. 32288. [Class 17 (i).] Lasting a n d pulling-over. - A shoe upper conforming machine has means organized for use in effecting the temporary securing of an upper in conformed position by a temporary fastening device which is formed for exerting, by means of a face thereof, pressure heightwise of the shoe over a considerable area. As applied to the step-by-step lasting machine described in Specification 24405/93, [Class 17, Boots &c.], a supply roll 11 carries strip cardboard and the lower face of the tack receiving member 1 is grooved longitudinally to guide the strip, the edge gauge or bunter 13 supporting it on its lower side. When the pincer has pulled over a portion of the upper, and while it is still under tension, the member 1 is advanced to wipe over the upper and carry a tack into driving position. A pawl 17 formed with rack teeth engages a ratchet wheel 15 on the shaft of a feed roll to feed the strip forward with the member 1. On the descent of the tack driver 5, the tack is driven and a knife 25, normally raised by a spring 27, is depressed by an abutment 29 on the driver to sever the end of the cardboard strip. A washer is thus left below the head of the tack to transmit pressure over a considerable area of the upper margin. The apparatus is intended for use on shoes wherein the margin of the upper is secured to the insole by cement.
Patent GB-254980-A (GB)
Title: Improvements in and relating to automatic electric motor starting controllers
IPC: H02P1/34
Filed: 1925-12-22
Abstract: 254,980. Igranic Electric Co., Ltd., (Cutler-Hammer Manufacturing Co.). Dec. 22, 1925. Automatic starters.-The starter comprises a line switch 1 and an accelerating switch 2. the latter operated by an electromagnet 2a controlled. jointly by a current relay 6 and an auxiliary switch 7. A spring 15 tending to close the auxiliary switch is put under strain by the closure of the line switch but the response is delayed by the inertia of the member 13, and in addition the relay 6 is held open until the current is reduced to a determined value.
Patent GB-291388-A (GB)
Title: Improvements in aircraft
IPC: B64C23/00
Filed: 1927-12-02
Abstract: 291,388. Boerner, A. June 1, 1927, [Convention date]. Planes, construction of; propelling; surface friction, reducing.-For driving aircraft air is withdrawn from the upper rear surface of the supporting plane and if desired also of the fuselage and pressure air is supplied to the undersurface thereof near the forward end. The air may be pumped through the body of the supporting plane or through separate conduits. The surface of the plane or fuselage comprises recesses k with rearwardly directed perpendicular faces. Fig. 3 shows a cross-section of a plane in which air is withdrawn through an orifice e and discharged through an orifice g and directed rearwardly by a screen h. A similar opening m with a screen n enables air to be discharged over the upper surface when desired. The openings e, g, m are controlled by sliding shutters or flaps. Holes d' in the forward edge of the plane and fuselage are provided to reduce head resistance and the air taken in is accelerated and discharged through the openings g or m. The planes are bent downwardly towards the tips and are swept rearwardly. Steering and balancing.-The planes are pivoted about axes c, Fig. 2, and their inner ends normally rest upon spring stops on the fuselage.
Patent GB-1039892-A (GB)
Title: A regulating system
IPC: H02P9/26
Filed: 1963-08-19
Abstract: 1,039,892. Automatic control of generators. SIEMENS-SCHUCKERTWERKE A.G. Aug. 19, 1963 [Aug. 18, 1962], No. 32771/63. Heading G3R. The field windings 10 of an alternator are excited through rectifiers 11,12, which are connected to transformer 13 and have grid control sets 15, 16, receiving signals from comparator 18. Signals dependent upon the rectifier current are obtained from transformers 14A, 14B, and applied to comparator 18 which also receives reference signals from circuit 19. The latter is of the type which receives a plurality of input signals and allows only the largest signal to become effective to provide a reference signal at the input of the comparator 18. As shown, a load angle controller 28 and a generator voltage controller 20 are associated with the input to the circuit 19. A reactive power controller 21 compares signals representing desired and actual values of the reactive power of the generator, and provides an error signal which is applied to the controller 20. Overcurrent limitation is afforded by controller 22, whilst controller 24 is connected to the controller 20 and operates to decrease the generator voltage when the reactive current increases. Signals representing the actual value of the generator voltage are supplied to the controller 24, and current signals to the controllers 22,24,these signals being derived from transformers 25, 26. A reference signal representing the desired value of the generator voltage is also applied to controller 24. The load angle of the generator is measured in circuit 27 by detecting the phase difference between signals derived from the generator voltage and from an A.C. tachometer generator 29 respectively. The output of the circuit 27 is compared with a reference signal, amplified in amplifier 28, and then applied as one input to the circuit 19. When the load angle exceeds an adjustable desired value, the signal from the amplifier 28 over-rides that from the controller 20 to decrease the exciter current and so reduce the load angle. The grid control sets 15,16 are connected to controller 14 which ensures that the rectifiers are never completely quenched. The circuit 19 comprises push-pull proportional amplifier 1 having its input terminal connected with diodes 2, 3 and resistor 4 connected to a source of negative bias potential. Only the larger of positive signals applied to the diodes 2, 3 respectively becomes effective as the input signal to the amplifier. If the diodes are reversed, then only the smaller signal becomes effective.
Patent GB-1147992-A (GB)
Title: Method of manufacturing foamed concrete
IPC: C04B38/02
Filed: 1966-07-21
Abstract: 1,147,992. Foamed concrete. HEBEL GASBETONWERK G.m.b.H. 21 July, 1966 [3 Aug., 1965], No. 32783/66. Heading C1H. In a method of making foamed concrete using a suspension of aluminium powder as the foaming agent, the suspension is made in a large quantity for a number of charges using neutral water, the portions required for the individual charges being removed from time to time after agitation of the stock suspension. The suspension may be formed from degreased aluminium powder and water at below 20‹ C. Preferably uniform distribution of the aluminium powder in the stock is maintained by continuous agitation and the removal of each individual portion is effected by an automatic measuring and dispensing device adapted to operate on a weight or volume basis.
Patent GB-970861-A (GB)
Title: Improvements in or relating to mattresses
Inventor: NICHOLS WILLIAM HENRY
IPC: A47C27/15
Filed: 1959-09-26
Abstract: 970,861. Mattresses. PLASTIKADE (MANCHESTER) Ltd. Dec. 28, 1960 [Sept. 26, 1959], No. 32799/59. Heading A4M. A mattress of polyurethane, other plastic or foam rubber in layers 11 covered by outer layers 10 and edge strips 12 has pads 13 secured to layers 10 at spaced intervals leaving gaps 14 and a textile cover is secured to the assembly by buttons or tufts at the intersections of gaps 14, the cover being pulled into the gaps to give a quilted appearance.
Patent GB-1387517-A (GB)
Title: Process for the production of acrylonitrile and catalyst for the process
IPC: B01J23/881
Filed: 1973-07-10
Abstract: 1387517 Oxidation catalyst SOC ITALIANA RESINE SIR SpA 10 July 1973 [1 Aug 1972] 32932/73 Heading B1E [Also in Division C2] A catalyst for the production of acrylonitrile by the ammoxidation of propylene, contains elements in the atomic ratio:-Bi 4-9  Zr 1-4  Fe 0À5-2  Mo 12  Vo 0À01-1  P 0-2  O 45-68 . The catalyst may be deposited on a support, such as silica.
Patent GB-1255907-A (GB)
Title: Salt core for use in foundries
Inventor: ANDERKO KURT
IPC: B22C1/00
Filed: 1970-07-07
Abstract: 1,255,907. Extracting castings; core-coating materials. KARL SCHMIDT G.m.b.H. 7 July, 1970 [9 July, 1969], No. 32992/70. Heading B3F. [Also in Division C3] In a method of forming a cavity in a casting, a water-soluble salt core comprising a mixture of a neutral water-soluble salt, synthetic resin binder, and water glass, is located in a mould where the cavity is to be formed in the finished casting. The core is formed by ramming the mixture into a wooden mould and curing and drying at 120 C. for 2 hours. Before casting eutectic Al-Si alloy the core is preheated to 550 C. The core is subsequently flushed out of the completed casting with water. The core may be coated with a layer of waterglass in a thickness of up to 0À1 mm. to ensure the formation of a smooth surface on the casting.
Patent GB-604856-A (GB)
Title: Improvements in and relating to refrigerator control apparatus
IPC: F25B49/02
Filed: 1945-12-06
Abstract: 604,856. Automatic control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 6, 1945, No. 33032. Convention date, Dec. 8, 1944. [Class 38 (iv)] [Also in Groups XIII and XXXVII] A bulb 3 containing methyl chloride is clamped to the evaporator 5 of a refrigerator and has the lower closed end projecting below the evaporator into the compartment so that the liquid evaporates in the lower part of the bulb and condenses in the upper part, which is connected by a tube 4 with a bellows 1 operating the switch 2 of the motor 8 driving the compressor 9. The control is thus in accordance with the temperature of both the evaporator and the air in the compartment. An opposing bellows may be provided to correct for changes in barometric pressure. Specifications 529,741 and 31023/45, as open to inspection under Sect. 91, are referred to.
Patent GB-438754-A (GB)
Title: Improvements relating to belt drives
IPC: F16H7/02
Filed: 1934-11-17
Abstract: 438,754. Belt gearing; conveyers. NYBORG, T. G., and MINING ENGINEERING CO., Ltd., Meco Works, Worcester. Nov. 17, 1934, No. 33088. [Class 80 (i)] [See also Group XXX] In a belt drive, more especially for a belt conveyer, the belt 4 is squeezed against the driving drum or pulley 1 by a mangle roller 3 so arranged that the resultant force on it due to the belt tension is substantially balanced by a reaction acting in or near the plane of the resultant, without substantially affecting the pressure of the spring 7 which produces the squeezing action of the mangle roller. As shown, the mangle roller is mounted on plates 5 pivoted at 6 in the plane of the resultant, and the whole of the reaction is taken by the pivot, but the pivot may lie in any plane intersecting the plane of the resultant at the axis of the roller 3 at not more than 25‹. The triangular plates 5 which carry the mangle roller also carry a plate 12 co-operating with a fixed plate 11 to prevent dirt from falling on to the lower run of the belt.
Patent GB-867424-A (GB)
Title: Improvements in windscreen washers
IPC: B60S1/48
Filed: 1957-10-23
Abstract: 867,424. Windscreen cleaners. TRICO PRODUCTS CORPORATION. Oct. 23, 1957 [Oct. 29, 1956], No. 33118/57. Class 138(1). A fluid pressure operated diaphragm windscreen washer pump has a hollow stem, through which the pressure fluid passes, attached to the diaphragm and extending into the pressure fluid supply conduit, a vent port which passes through the wall of the conduit being uncovered by the stem at the end of the pump stroke. As shown, compressed air from pipe 24 reaches the top of diaphragm 34 through stem 39, water being delivered from chamber 33 via ball valve 53 to pipe 21 and the windscreen, and chamber 33 being refilled via ball valve 48 on the return stroke of the diaphragm actuated by spring 37. When the top of stem 39 uncovers ports 44, pressure above the diaphragm and in pipe 24 is released. The pump is controlled by valve 22. When knob 66 is pressed, disc 61 engages seat 72 and the compression of spring 59 moves piston 58 against stem valve 62 allowing compressed air from supply pipe 23 to reach pipe 24. Some air passes up passage 69 and secures disc 61 on seat 72 so that the compressed air supply to the pump is maintained so long as there is pressure in pipe 24. When ports 44 are uncovered, the pressure in pipe 24 drops, disc 61 returns to the position shown, and the supply of compressed air through valve 62 is cut off.
Patent GB-392974-A (GB)
Title: Improvements in or relating to the application of adhesive or other coatings to strip leather or like articles
IPC: A43D25/18
Filed: 1931-12-01
Abstract: <PICT:0392974/III/1> A leather strip 30 for use as a welt in making boots and shoes is coated with a narrow band of adhesive by drawing the strip by feeding and presser rolls across the periphery of an applying roll 18 supplied with adhesive by a transfer roll 12.  The strip is supported and pressed against the applying roll by a thrust member 38 forced towards the applying roll by a spring 44.  Gauges 46, 50 limit the width and thickness of the band of adhesive applied. The presser roll 32 and the two gauges are raised to introduce the strip, the lifting of the gauge 46 effecting simultaneously the retraction of the thrust member 38.  Specification 369,599, [Group VII], is referred to.
Patent GB-1182578-A (GB)
Title: A Double-Walled Cylindrical Cold Liquefied Gas Storage Tank
IPC: F17C3/02
Filed: 1968-07-12
Abstract: 1,182,578. Liquefied gas storage containers. PITTSBURGH-DES MOINES STEEL CO. 12 July, 1968 [2 Feb., 1968], No. 33297/68. Heading F4P. A cylindrical flat-bottomed inner cold liquefied gas storage tank is supported by a plurality of spaced modules 40, 70'Fig. 4 located between the tank bottom 30 Fig` 1 and the flat bottom 20 of an outer tank and rigidly connected together by planking 90, and the spaces between the modules and that between the cylindrical side walls 32, 22 of the inner and outer tanks are filled with heat insulating material e.g. expanded perlite or mineral wool. The modules 40 which are peripherally arranged beneath the inner tank wall 32 comprise radially extending wood blocks 42, 46, tangential blocks 44 therebetween and top plates 50 all nailed together, whereas modules 70 which support the tank bottom 30 comprise hollow rectangular frames filled with loose insulation 62 and to which are nailed the planks 90. The latter are also nailed to shoulders 56 on modules 40. The exterior of wall 32 is secured by anchor straps 66 which pass between the sector-like space between blocks 40, through a concrete levelling pad (58) Fig. 3, (not shown) and into a concrete foundation 16 supported by piles 14.
Patent GB-372739-A (GB)
Title: Improvements in band-pass filters
IPC: H03H7/01
Filed: 1930-11-05
Abstract: 372,739. Valve amplifying circuits; filter circuits. DUBILIER CONDENSER CO. (1925), Ltd., Ducon Works, Victoria Road, North Acton, London.-(Assignees of Dalpayrat, H. F.; 45, East 22nd Street, New York, U.S.A.) Nov. 5, 1930, No. 33304. Convention date, Nov. 19, 1929. [Classes 40 (iii) and 40 (v).] A band-pass coupling comprises a coil 2, Fig. 3, and variable condenser 3, the circuit so formed being shunted by end extensions 4, 41 in series with fixed condensers 5, 5<1>. Fig. 3A represents the corresponding frequency-response curve 9, compounded of the curve 7 due to the main circuit 2, 3, the curve 8 due to the combination of this circuit with the coil extension 4 and condenser 5, and curve 10 due to the addition of the second coil extension 4<1> and condenser 51. The two end extensions of the coil 2 may be connected to the same fixed condenser. Or only one end extension and one fixed condenser may be used. In a modified arrangement, Fig. 4, the secondary coil 2 is closely coupled to an open-ended coil 12 having a relatively large number of turns. The distributed capacity 13 between the individual turns, in combination with an earth capacity 14, forms a number of shunt circuits similar to 4, 5 and 4<1>, 5<1>, Fig. 3, and results in a wider band-response. Fig. 5 shows a complete receiver with an aerial input formed of a combination of the circuit shown in Fig. 4 with a simplified form of the circuit shown in Fig. 3. The same circuit is also used as a coupling between the screened-grid valve 15 and the detector valve 16, which is, in turn, coupled through two radio-frequency chokes 38, 39 shunted by condensers 41, 42, 43 to the first low-frequency stage 17. A variable resistance 30a regulates the grid bias on the valve 15, whilst a filament rheostat 31 serves to control volume.
Patent GB-190162-A (GB)
IPC: B60C23/18
Filed: 1922-12-07
Abstract: 190,162. Marti Cabretosa, V. Dec. 7, 1921, [Convention date]. Non-metallic elastic bodies and cores; tyre attachments to rims. -A rubber tyre is formed with radial pockets 44, 45 which communicate with one another and with the atmosphere by lateral passages 46, 47 respectively. Rubber &c. blocks 48, 49, correspondingly apertured, partially fill the pockets. To lessen friction between the blocks and the walls of the pockets, and to augment air-circulation, the contacting surfaces of those parts are formed with straight or helical crossing grooves. The tyre base is corrugated to seat on a corresponding ring 52 which is riveted to a band 51 fitting the rim-bed 34. The tyre is clamped between a fixed flange 35 and a detachable flange 37 which is secured by bolts 53 housed in the corrugations of the ring 52.