baber/WOPTO huggingface dataset:
Patent GB-468218-A (GB)
Title: Improved process for the preparation of acetic anhydride
IPC: C07C51/56
Filed: 1935-12-31
Abstract: <PICT:0468218/IV/1> <PICT:0468218/IV/2> Acetic anhydride is produced by heating acetic acid vapour in presence of an anhydrideforming catalyst, cooling the reaction vapours, to condense acetic acid water and acetic anhydride as described in the parent case, and then separating the acetic acid and reacting it with the ketene which remains uncondensed.  The reaction vapours from an apparatus b, Fig. I, are cooled at c, the condensate passing to a fractionating column d, water containing some acetic acid being withdrawn at the top and condensed at g, while the ketene vapour passes from the cooler c to the bottom of a trickle tower e where it reacts with acetic acid from the column d forming anhydride, and the reaction heat in e vaporizes a part of the acetic acid, which passes to the column d by a pipe m and assists the fractionation in d; reduced pressure is maintained by a pump i.  In a modification, Fig. II, the vapour liberated in e is cooled at l or by an external cooler, and waste gas escapes to the pump i; if for any reason there is too little acetic acid in e, more is added through m.  In an example, acetic acid vapour containing 0,1 per cent of ammonia and 0,3 per cent of triethyl phosphate is passed through a chromium alloy tube at 780 DEG  C., a pressure of 30--40 mm. being maintained by the pump i, using the apparatus shown in Fig. II.  The vapours are cooled to 0 DEG  C., and the condensate fed to the column d, 55 per cent acetic acid distils from the top of the column and a mixture of 75 parts acetic acid and 25 parts acetic anhydride flows to the tower e, which is also fed with additional acetic acid.
Patent GB-1401442-A (GB)
Title: Diaphragm pump and non-return outlet valve therefor
IPC: F04B53/10
Filed: 1971-07-30
Abstract: 1401442 Diaphragm pumps HENDERSON PUMPS & EQUIPMENT Ltd 30 Oct 1972 [30 July 1971] 36043/71 Heading F1A [Also in Division F2 ] A diaphragm pump, e.g. for bilge water, comprises a diaphragm 9, Fig.1, secured to a housing 10 and reciprocated by a handle 6, check valvecontrolled inlet and outlet connections 13 and 14 communicating with the housing, the outlet check valve comprising a member 30, Fig.7, of neoprene or nitrile rubber with a tubular portion 32 which extends into the outlet pipe and a flange 31  which fits within recesses in the housing. Tubular portion 32 has three triangular-section recesses 33 in its side walls increasing in section towards its end 34 to define slits in a star configuration. In the rest position, the slits are closed, the pump delivery pressure opening the slits to form a substantially circular opening.
Patent GB-1454930-A (GB)
Title: Universal rolling mill
IPC: B21B13/10
Filed: 1974-08-16
Abstract: 1454930 Universal rolling mills NIPPON KOKAN KK 16 Aug 1974 [4 Sept 1973] 36084/74 Heading B3M In a universal rolling mill housing, each chock of each of top, bottom, and vertical rolls is provided with a pair of roll gap adjusting wedges arranged adjacent the inner surface of a housing window, each wedge being adjustable in the direction of the axis of its associated roll. The housing construction also facilitates roll removal. Figs. 1 and 2 show a mill in which top and bottom rolls 1, 2 have chocks 6, 6<SP>1</SP>, 7, 7<SP>1</SP> pivotally mounted in blocks such as 46 slidable in grooves 47 in the housing. The chocks bear through mating cylindrical or spherical surfaces on pressure members 31, 31<SP>1</SP>, 3111, 31<SP>111</SP> which contact the wedges 11, 11<SP>1</SP>, 12, 12<SP>1</SP>, 13, 13<SP>1</SP>, 14, 14<SP>1</SP> (some not shown). The wedges are adjustable by lead screws 15, 15<SP>1</SP>, 16, 16<SP>1</SP>, 17, 17<SP>1</SP> rotatable by motors and reduction gears. For removal of these rolls, the top part of each housing is a beam 10, 10<SP>1</SP> which after removal of a pin 49, 49<SP>1</SP> by jack 37<SP>1</SP> is pivotable through 90 degrees by a jack 29, 29<SP>1</SP>. The upper roll balancing devices 30, 301 have rods 30<SP>11</SP>, 30<SP>111</SP> ending in T-pieces so as to be engageable with or disengageable from chocks 6, 6<SP>1</SP> by rotation. One end of each roll 1, 2, is axially adjustable, and the other is axially free (Fig. 9, not shown). The vertical rolls 3, 4 are mounted in chocks 8, 9 slidable between yokes 5a, 5a<SP>1</SP>, 5b, 5b<SP>1</SP> on the housing. These chocks bear through pressure pieces (not shown) against wedges 22, 22<SP>1</SP>, 23, 23<SP>1</SP> movable vertically by motors, reduction gears and lead screws. Each wedge has a cut away part enabling the chocks and rolls to be withdrawn laterally when the wedges are appropriately positioned. Fuid pressure balancing devices are provided for the vertical rolls (see Fig. 3, not shown).
Patent GB-1079290-A (GB)
Title: Composite and prestressed steel-concrete beams and structures and their manufacturing process
IPC: E04C3/293
Filed: 1965-08-24
Abstract: 1,079,290. Reinforced concrete structures. A. BIRGUER. Aug. 24, 1965 [May 21, 1965], No. 36215/65. Heading E1W. In a process for making a structure including a prefabricated concrete beam, the tension zone of the beam is prestressed by means of tensioned reinforcement 6, after which a non-stressed metal element 8 is fastened to the tension zone by high tensile bolts 10 with the interposition of a layer 9 of adhesive material which is allowed to set, and finally a second prestress is applied to the structure by means of tensioned reinforcement 7 in the tension zone of the beam. One or more further non- stressed metal elements 2, 3 are provided on the compression zone of the beam, these elements being either attached by studs 5 when the beam is cast, or fixed by high tensile bolts after the first prestress is applied to the tension zone by the reinforcements 6. An upper slab 12 may be cast before the second prestress is applied, and the beam may have connecting rods which engage in the slab. Cables 13 for tranverse prestress are provided.
Patent GB-1197205-A (GB)
Title: Method of Making a Semiconductor Switching Element
IPC: H01L29/36
Filed: 1967-08-07
Abstract: 1,197,205. Semi-conductor devices. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 7 Aug., 1967 [13 Dec., 1966; 29 Dec., 1966; 13 March, 1967], No. 36217/67. Heading H1K. Deep-level impurities are frozen into a semiconductor body during the manufacture of a switching element by cooling after diffusion of the impurities from a liquid phase eutectic alloy into the solid phase semi-conductor body. A relatively high concentration of deep-level impurities accumulates in the vicinity of the interface between the recrystallized region and the semi-conductor body. The eutectic alloy may include the deep-level impurity material as a major constituent, or this impurity may be contained within an alloy involving other materials. The semi-conductor body may be predoped with a concentration of deep-level impurities, e.g. by diffusion, prior to the alloying process of the invention. The embodiment shown comprises a P-type Si body 21, which may optionally be pre-doped with Cu. On alloying an Sb-doped Au foil to the body at at least 1000 C., and then cooling rapidly, a recrystallized N-type region 22 is formed, with a region 23 of high Au concentration within the P-type body 21 and adjacent the resulting junction, the electrode 24 being of Au containing some Si (and Cu). A sharpening of the negative resistance characteristic due to avalanche breakdown is said to result from the localized high-Au concentration region 23. An ohmic electrode 25 is applied to the body 21, or alternatively the alloying process described above may be applied to both faces of the body, resulting in a bi-directional switch which may or may not be provided with a gate electrode. Ge may also be used for the body 21, and other deep-level impurities referred to are Fe, Co, Mn and Ni.
Patent GB-779186-A (GB)
Title: Rotary electromagnets
IPC: H01F7/13
Filed: 1955-12-19
Abstract: 779,186. Electromagnets. LEE SPRING CO., Inc. Dec. 19, 1955 [June 21, 1955], No. 36339/55. Class 35. The armature 26 of a rotary electromagnet has a return spring (not shown) concentric with its shaft 18 and a resilient spring strip 88 secured to its shaft and arranged to meet an abutment during the last few degrees of movement so as to overcome the residual magnetism on deenergization. The stator 32 consists of curved sections carrying coils 40 joined by opposed pole faces 42, 44, the latter, towards which the armature turns, having slots 54 for shading coils. The abutment rotor pole-faces 46 have corresponding recesses 55 to accommodate the outer edges of the shading coils. The coils 40 are insulated from the core by insulating strips 68, 70 located by slots 66 in the core, and by curved strips 72 secured by end-cheeks 76 having cuts 80 enabling them to be fitted in position.
Patent GB-1402768-A (GB)
Title: Automatically operable pressurised dispensing devices
IPC: B65D83/16
Filed: 1972-08-04
Abstract: 1402768 Door actuated mechanism for dispensing container valves J BRENEZ and A MOURGUES 4 Aug 1972 [27 Dec 1971] 36543/72 Heading F1R A device for actuating a pressurized dispenser valve by movement of a door, comprises a mounting bracket for the container carrying a door engaging lever 22 secured to, and for causing angular movement of, the actuator 18 which has internal teeth engaged by a spring pawl on a spindle 13 rotatable on the bracket and having an axial cam surface at the lower end which engages a complementary cam surface formed in a hollow button 4 mounted on the container valve tube 3. Angular movement in one or both directions of the lever 22, depending on the shape of the actuation teeth and the cam profiles, causes axial movement of the button.
Patent GB-1318585-A (GB)
Title: Mixing apparatus
IPC: B01F25/60
Filed: 1970-07-29
Abstract: 1318585 Mixing apparatus E I DU PONT DE NEMOURS & CO 29 July 1970 [30 July 1969] 36733/70 Addition to 1255638 Heading B1C Apparatus for mixing liquid reactants comprises a cylindrical chamber 16, inlets 17, 18 in the periphery of the chamber, at least one of the inlets being in the form of either a slot as shown, or more than two discrete apertures aligned axially of the chamber (Fig. 2, not shown), a rotor 20 mounted coaxially within the chamber and arranged to be driven by a source of power other than the inlet momentum of the reactants, the rotor being in the form of a cylinder having a diameter of 90-99.85% of the diameter of chamber 16 or having blades terminating close to the periphery of the chamber, and an outlet 19 in the periphery of the chamber downstream from the inlets in the direction of liquid flow. The inlet and outlet streams can be directed into and out of the chamber tangentially as shown or radially or at any angle therebetween. At least one of the inlets may be supplied via a distributor manifold or chamber (Figs. 2-4, not shown). The reaction mixture may be recycled through the apparatus (Fig. 5, not shown).
Patent GB-1466450-A (GB)
Title: V-butt welding
IPC: B23K9/02
Filed: 1974-08-21
Abstract: 1466450 Welding by fusion VARIOSFABRIEKEN BV 21 Aug 1974 [22 Aug 1973] 36816/74 Heading B3R A grooved backing bar 6 for one-side V butt welding is held in place by spring steel retaining elements 7 rotatably retained in bores 8 of the bar and having legs arranged, in their unstressed state, to diverge at an angle α (Fig. 2) greater than that # (Fig. 1) of the V of the weld preparation, the arrangement being such that when placing the bar in position the elements are initially orientated so that their legs pass through the preparation root gap 5, as shown in Fig. 2, the elements then being given a quarter turn, by way of handle portions of the elements, to the position shown in Fig. 1 in which the legs are stressed against the preparation V walls 3, 4. The elements may be of wire or strip. The element portions located in the weld preparation are fused with the weld metal and the handle portions fall away with the backing bar after weld metal solidification. The backing bars may, by selection of their number, length and form, be used for welding curved workpieces. Single or double V, corner, vertical or inclined butt welds may be effected.
Patent GB-787713-A (GB)
Title: Improvements in or relating to electrical connectors and more particularly to ceiling roses
IPC: H02G3/20
Filed: 1955-12-22
Abstract: 787,713. Ceiling-roses; two-part couplings. MASON, O. Dec. 22, 1955, No. 36829/55. Class 38 (1). The two parts of a connector, as shown a ceiling rose, of the type described and claimed in Specification 615,692, in which the detachable part 12 slides into an undercut groove 13 in the fixed part 11, are automatically spring-locked on assembly by the engagement of rounded ends of spring plunger contacts 17 with the concave upper surfaces 38 of contacts 29 in parts 11 and 12 respectively. Part 12 comprises a metal casting 27 and an insulating plug 28 located in the casting by a screw 37, the contacts 29 being screwed into said plug. Two studs 34 on the casting facilitate the insertion of part 12 into groove 13. Part 11 also comprises a metal casting 15 and contact-carrying insulating plug 16, the groove 13 being formed in a portion 20 of the casting. The contacts 17 are retained in the plug 16 by fibre discs 24, 25. A flange 23 on plug 16 is formed with locating studs (not shown) to co-operate with apertures (not shown) in the casting wall 19. The locking means may alternatively be independent of the contacts which may then have flat contact surfaces.
Patent GB-1403433-A (GB)
Title: Gas cutting method and means
IPC: B23K7/00
Filed: 1972-08-10
Abstract: 1403433 Gas cutting MITSUI SHIPBUILDING & ENG CO Ltd 10 Aug 1972 [27 Aug 1971 30 Sept 1971] 37363/72 Heading B3V A metal plate 1 is cut by using two gas cutting jets 7, 8 one of which 7 is inclined to the plate surface and the other of which 8 impinges on the plate 1 immediately adjacent but rearwardly of the position of impingement of the one gas jet 7 so that prior to impingement the two gas jets 7, 8 project across, but do not interfere with each other when viewed laterally and so that two overlapping kerfs are produced. In an embodiment described, a cutting oxygen jet 7 from a nozzle 3 is advanced ahead of a cutting oxygen jet 8 from a nozzle 4 and is inclined at an angle of 20-50 degrees to the normal to the plate 1. The nozzle 3 may also be arranged obliquely relative to the cutting direction 2. The pressure of the oxygen jet 7 is preferably lower than that of the oxygen jet 8 such that it cannot along cut completely through the plate 1. In another embodiment, two cutting oxygen jets 8 are arranged on each side of the inclined cutting jet 7 (Pig. 6, not shown). The jets 7, 8 may alternatively emanate from a single torch assembly.
Patent GB-1007716-A (GB)
Title: Improvements in or relating to delay lines
IPC: H03H9/40
Filed: 1961-10-18
Abstract: 1,007,716. Electromechanical delay lines. WESTERN ELECTRIC CO. Inc. Oct. 18, 1961 [Oct. 21, 1960; Nov. 15, 1960], No. 37325/61. Heading H3U. An electromechanical dispersive delay line having a linear delay/frequency characteristic comprises a wave transmission body in the form of a tapered body and means for propagating elastic longitudinal-mode wave motion in the body. The transmission body may be in the shape of a tube (Fig. 4) or a strip. Either the thickness dimension of the strip (Fig. 2) or the width dimension (Fig. 11) may be tapered. In the former case, the thickness of the strip is made equal at one end to a wavelength at the lower limit of the operating band and equal at the other end to a wavelength at the upper limit. The width dimension is at least ten times the thickness dimension. Ceramic transducers 15 attached to the end faces and polarized in the thickness direction in such a manner that they operate in a thickness-longitudinal mode. The edges of the strip may be covered with absorbent tape 14, 14a and part of this may overlap on to the adjacent major faces. As shown in Fig. 11, the overlapping part 18 exactly corresponds to the extent of the taper. The upper end of the transducer may be arranged level with the top edge of the delay line. In order that the midfrequency of the delay/frequency characteristic may coincide with the frequency of minimum attenuation, it is necessary to choose for the delay line a material having a Poisson's ratio of about 0À33. A suitable Al-Cr-Mg alloy is given in the Specification.
Patent GB-828779-A (GB)
Title: Apparatus for handling overspray paint
IPC: B05B16/00
Filed: 1955-12-30
Abstract: <PICT:0828779/III/1> <PICT:0828779/III/2> A spray booth wherein overspray paint materials are captured, killed and floated by an aqueous solution of paint killing agents comprises apparatus for separating the floating point and maintaining continuous recirculation of the liquid consisting of a tank having a weir forming part of the boundary of the tank over which the killed paint and adjacent aqueous solution flow into container means.  Air is drawn across the article being sprayed, the air is washed and the paint particles collected in the circulating aqueous solution in the booth.  The aqueous solution and killed paint flow from a trough over a vertical plate 2 to a tank 6 then over a weir 8 to a sluice trough 10 at the lower end of which it passes under a baffle 16 to a sludge collection trough 18 where it passes through one or more screens 20, 22.  A pump 24 skims the top layer of killed paint and discharges it through pipe 44 to a separation chamber 26 and through a pipe 46 to the sluice trough and through a pipe 50 to nozzles 54, 56, 58 and 66. Liquid in trough 18 is also recirculated by a submerged tunnel 28 which is connected to air washers 30, 32 and 34.  The circulation may also be increased by supplying liquid from a trough 62 having a partition 63 above the liquid in the tank the partition being cut away at 64 to provide flow of liquid into the trough and into the tank.  A weir 36 parallel to the weir 8 may be provided to prevent rearward flow of the liquid.  A float 68 in the trough 18 controls the level of the liquid in the trough so that air does not enter a tunnel 42 connected to an air washer.  A float 78 in the tank prevents the level falling too low in the tank.  The pump 24 comprises a motor driving a vertical shaft carrying a plate with upstanding vanes placed just beneath the liquid surface.  The outlet pipe from the pump enters the top of the separation chamber 26 and an outlet shoot 106 discharges the upper layer of liquid comprising the killed paint.  An overflow comprises a cup 108 below the shoot and connected by a pipe 112 to a pipe 52 entering the bottom of the chamber and connected to the pipe 50.  The cup is surrounded by partition 114 which reaches almost to the bottom of the chamber.  A second overflow pipe 116 is connected to the pipe 52, the flow of liquid being controlled by valves to provide a discharge from the shoot 106.  Specifications 754,585, 815,470 and 828,778 are referred to.
Patent GB-860817-A (GB)
Title: Improvements in expansion joints for wall panels
IPC: F17C3/02
Filed: 1958-02-26
Abstract: 860,817. Storing liquefied gases. CONSTOCK LIQUID METHANE CORPORATION. Feb. 26, 1958 [March 14, 1957], No. 37591/58. Divided out of 860,814. Class 8(2). The joint lines of adjacent panels forming a heat insulation lining of a liquefied gas storage tank are covered by impermeable strip material 45, e.g. aluminium which is bonded at its margins to adjacent panels but is free along the centre portion which is either embossed or recessed to lie in a groove 30 scored along the joint line andprovides an expansion joint. Specifications 860,815, 860,816 and 860,819 also are referred to.
Patent GB-966858-A (GB)
Title: Improvements in or relating to the cleaning of porous objects
IPC: B06B1/08
Filed: 1960-11-02
Abstract: 966,858. Filters. CAVITRON ULTRASONICS Inc. Nov. 2, 1960 [Nov. 2, 1959], No. 37604/60. Headings BID and BIT. [Also in Division H4] Cleaning of a filter element, e.g. an inward flow element F, Fig. 27, having an open end j and a closed end i and made of tightly woven stainless steel, fibre glass or nylon yarn is effected by immersing it in a bath of cleaning liquid 65, Fig. 1, and subjecting it to ultrasonic vibrations emanating from the working face 7, Fig. 2, of a magneto-strictive vibrator A (see Division H4) and in a direction normal to that portion of the filter surface being cleaned thereby producing intense cavitation of the column of cleaning liquid between said face 7 and the filter surface. Prior to cleaning, the open end j-of the element F is pushed over an adapter 60, Fig. 12, capable of rotary and axial movement relatively to a tubular supporting arm 50 and thus relatively to the vibrating face 7. The tube 50 surrounds an inner tube 51 so as to form an outer passage 50<SP>1</SP> which is connected by a cylindrical manifold 53 to a duct 71 supplied with pressurized cleaning liquid by a pump 73 when a two-way reversing valve 68 is in the position shown in Fig. 22. The manifold 53 is capable of a 90 degrees movement relative to a knuckle member 52, Fig. 11, and the latter is carried by an arm 56 held by a clamp 57. The pump 73 delivers through a duct 75 from which branches a sampling duct 76<SP>1</SP>, through a flow meter 79, the valve 68 and duct 71, passage 51<SP>1</SP> and the filter wall and liquid is withdrawn from the bath through duct 71, the valve 68 and a duct 72. On reversing valve 68 cleaning liquid flows inwardly through the filter wall, through passage 50 and duct 71, the valve 68 and the inlet duct 72 of pump 73 and pressurized liquid passes from duct 70 through valve 68 and duct 67 to the bath. The pressure drop so formed within the filter element is transmitted through an inner passage 51<SP>1</SP> of the tube 50, the manifold 53 and a duct 97 to a calibrated manometer 92 whereby the porosity of the filter element may be compared with that of a standard element. The cleaned filter element is tested for enlarged pore openings after removing from adapter 60 by connecting it to a plug 98 and supplying compressed air from a line 81 through a filter 84, flow and pressure regulating devices 85, 87, 88 and immersing it in the cleaning bath ; the maximum pressure at which air bubbles appear on the outer surface of the filter being a measure of its soundness. The so-cleaned and tested element F is resiliently held by a spring-biased collar o, Fig. 34, within a casing m having an inlet n<SP>1</SP> and a cleaned fluid outlet n<SP>11</SP>. A disc-like filter element having concentric corrugations is held during cleaning in the mouth of a funnelshaped adapter 63, Fig. 18 (not shown), to the spout of which is adjustably secured the tube 50. Specification 966,859 is referred to.
Patent GB-1394106-A (GB)
Title: Method of preparing an antifriction material
IPC: C01B31/36
Filed: 1972-08-12
Abstract: 1394106 Silicon carbide bodies A S TARABANOV P N MAKHALOV V S DERGUNOVA G E LAZAREV A D GOPIUS G V ANTIPIN and M T BANNIKOV 12 Aug 1972 37726/72 Heading C1A A SiC body containing elemental C and Si is prepared by (a) hot-pressing a mixture of carbonaceous material with a binder at a temp. of 150-180‹ C. to form a green body having a density of 1À0-1À4 g./c.c., (b) calcining the green body at 800-1000‹ C. and then (c) impregnating the body with molten Si at a temp. of 1700-2050‹ C. The body may have a SiC content of 20-72% by wt., C content of 10-75% and a Si content of 3-25%. Fe and/or Al may be added to the carbonaceous mixture prior to pressing in an amount up to 3% by wt. of the product. The molten Si may be alloyed with Ni, Co, Zr, Nb, Ti, Mo, W, Ta and/or Cr. The carbonaceous material may be graphite, carbon black and/or carbon fibres. The binder may be a phenol-formaldehyde resin. Compression may be carried out at a pressure of 50-200 kg./cm.<SP>2</SP>. The green body may be calcined in an inert atmosphere and the impregnation performed in a vacuum.