baber/WOPTO huggingface dataset:
Patent GB-1322249-A (GB)
Title: Process and apparatus for the flotation of fine-grained mixtures of material particularly of minerals
IPC: B01D3/24
Filed: 1970-10-22
Abstract: 1322249 Froth flotation DES ALTENBERGS FUR BERGBAU UND ZINKHUTTENBETRIES AG 22 Oct 1970 50236/70 Heading B2H In a process for the flotation of fine-grained mixtures of material, e.g. minerals, from a pulp to which flotation agents have been added, the pulp is ventilated and conveyed through at least one feed pipe 11, Fig. 2, into a cyclinetype flotation cell 1 by means of at least one air lift 5, Fig. 1, preceding the flotation cell, in which cell the pulp is fed tangentially into an annular chamber 10 closed at its top and surrounding a foam discharge chamber 7 into which the foam formed in the chamber 10 and containing the material to be floated out passes and is withdrawn from the upper part thereof. Air in excess of that required for froth flotation is removed from the upper part of the chamber 10 through one or more ventilating pipes 12 provided with a damper or valve 13 for regulating the quantity of air discharged. The pulp with air bubbles present therein passes from the chamber 10 into a funnelshaped base part 14 of the flotation cell which is provided with perforated settling plates 15. The air bubbles carrying the grains of material to be floated out rise to the top of the funnel 14 and pass, together with further grain-carrying bubbles passing through perforations 16a in the lower edge zone of the partition wall 16, through a screening plate 7a into the foam discharge chamber 7. The latter has a lower cylindrical part and an upper rectangular part over the opposite edges 17 of which the foam discharges with the desired material into collecting channels 8 and is withdrawn through pipes 18. The remainder of the pulp flows through a pipe 9b into an overflow box 19 which is provided with an adjustable weir 20 which regulates the level of the pulp in the flotation cell. The ventilating pipe or pipes 12 lead into the box 19 to convey compressed air back to the pulp being discharged. The pulp then flows from the overflow box through discharge pipes 9, 9a to a further flotation cell of a flotation plant, Fig. 1, consisting of three cells 1 connected in series and provided with an air lift 5 before each cell.
Patent GB-1462796-A (GB)
Title: Adjustable suction device
IPC: D06B15/04
Filed: 1974-11-20
Abstract: 1462796 Suction apparatus RIMAR SpA 20 Nov 1974 [21 Nov 1973] 50294/74 Heading F4G A suction device for, for example, withdrawing liquid from a woven fabric, comprises two longitudinally extending or mutually facing half-shells 1, 2, one 1 being fixed and the other 2 being pivoted to said one half-shell 1 through a driving shaft 23 and a pusher 7 sealingly passing through the one half-shell 1 and engaging the inner surface of the other half-shell whereby the slit 4 formed between the free longitudinally extending edges 11, 22 may be adjusted in width. The pusher 7 is driven by a linkage which connects the pusher to a shaft 8 perpendicular to the direction of motion of the pusher 7. The shaft 8 is provided with an actuating means (Figs. 1, 3, not shown). A further shaft 30 extending parallel to the edges 11, 22 of the half-shells 1, 2 is provided, the shaft 30 carrying a laminar elongate rectangular element 32, 33 which may be brought across the slit 4 so as to close a part thereof. The space 6 between the half-shells communicates with a suction means. As disclosed a plurality of equispaced pushers 7 are provided the range of movement thereof being limited by a pin and slot 13 connection. The shaft 8 drives a worm gear 9 and the rotation thereof is translated into linear motion of the pusher by co-operating threads 10, 12. The shaft 30 carries a plurality of elements 32, 33 adjacent each end thereof for the purpose of limiting the extent of the slit open to the material to be treated. A seal 37 is interposed between the half-shell 2 and a hollow shaft 3 which carries the driving shaft 23. The half-shells 1, 2 may be pivoted away from each other for maintenance purposes by rotating the driving shaft 23.
Patent GB-1127017-A (GB)
Title: Improvements in alternating current generators
Inventor: SOMERVILLE WILLIAM MURRAY
IPC: H02K19/24
Filed: 1964-12-10
Abstract: 1,127,017. Dynamo-electric machines, &c. CLARKE, CHAPMAN & CO. Ltd. 1 Dec., 1965 [10 Dec., 1964], No. 50318/64 Heading H2A. A rotor for a high-speed A.C. generator comprises three parts, all of high-strength low reluctance ferrous alloy, the main part consisting of a cylindrical section with at least one, preferably two, (like) poles extending radially outwardly from the middle of its length, and the two other parts each consisting of a sleeve located about the first part and having recesses to accommodate one half of each pole. The unrecessed portions of the sleeves meet and are joined at the mid-point of the length of the main part to form the opposite poles, but a gap is left all around the periphery of each main part pole, this gap being continuous with an annular gap between the sleeves and the main part. This gap is filled with brass, phosphor bronze, or stainless steel of low permeability to function as a damping winding and to form a bond between the parts. Beyond the sleeves the main part has cylindrical or frusto-conical portions ending in bearing trunnions. In the alternator,the complete rotor is surrounded, at the middle, by a wound stator ; the sleeve ends, which are tapered, are closely surrounded by tapered extensions of the inner walls of excitation coil casings, these tapered extensions being directed axially inwards; and the ends of the abovementioned " main part " are surrounded by extensions of outer walls of the excitation coil casings. The purpose of the rotor construction is to provide strength at speeds of the order of 30,000 r.p.m.
Patent GB-1236986-A (GB)
Title: Low bulk leakage current avalanche photo-diode
Inventor: BIARD JAMES ROBERT
IPC: H01L31/107
Filed: 1968-10-23
Abstract: 1,236,986. Semi-conductor devices. TEXAS INSTRUMENTS Inc. 23 Oct., 1968 [15 Feb., 1968], No. 50367/68. Heading H1K. An avalanche photodetector has an active junction 7 between a shallow highly-doped N + (P + ) region 6 and a P(N) region 3, both of which regions emerge at the upper surface 4 of the device and carry electrodes 12, 9 thereon respectively, and a " back " junction 2 between the region 3 and a highly doped " back " region 1 within a minority carrier diffusion length of the active junction 7. The function of the back junction 2 is to reduce the bulk leakage within the device. In the embodiment shown the back region 1 is of the opposite conductivity type to the region 3, which may be formed on it by diffusion or epitaxial deposition, and the region 1 carries an electrode 14 to permit reverse biasing of the back junction 2. In an alternative form the back region (21), Fig. 2 (not shown), is of the same conductivity type as the region (3) and carries no electrode. Fig. 1 also shows the provision of a deep annular diffused N-type guard ring 5 around the periphery of the shallow N + region 6, which is also diffused. An inversion layer-inhibiting P + ring 16 is also provided either by diffusion or by alloying from the annular A1 electrode 9. The electrode 12 is of Au on Mo while the back electrode 14 is of Au. Ge, Si or InAs are referred to as alternative semi-conductor materials, with Sb as a dopant in regions 1, 5 and 6 and Ga in region 3 in the case of Ge.
Patent GB-1281228-A (GB)
Title: Tool for simulating finger-pressure treatment
Inventor: SEKIGUCHI USHINOSUKE
IPC: A61H7/00
Filed: 1969-10-14
Abstract: 1281228 Massage apparatus U SEKIGUCHI 14 Oct 1969 [14 Oct 1968] 50437/69 Heading A5R Apparatus for simulating finger pressure comprises a generally rectangular container 2 having a plurality of frusto-conical retaining bosses 3 integral in an upper face 4 set around apertures therein, and a corresponding number of hollow, generally cylindrical members 1 placed partially within the cups 3 and retained apertures therein, and a corresponding number therein by means of lateral shoulders 10 on each member 1 cooperating with lips 11 of upper openings in the cups 3, which cups also contain a resilient member 12, preferably a helical spring, tending to engage the shoulders 10 with the lips 11. A plate 6 is fixed to the base of the container 2 and supports a platform 7 having depressions 9 therein arranged beneath the apertures in the face 4 beneath the cups 3. The springs 12 are placed in the depressions 9 and extend upwards into the interiors of the members 1. The diameters of the shoulders 10 are greater than the corresponding diameters of the depressions 9 to limit the axial movement of the members 1. The 3 parts of the members I extending out of the cups 3 have rounded, closed ends 13. In a modification, Figs. 3 and 4 (not shown), this end 13 is formed with a plurality of shallow, round depressions (14) and in a further modification, Figs. 5 and 6 (not shown), the end part 13 is solid and of an elastic material such as rubber and is also provided with depressions (14). The end parts 13 of the members 1 in all embodiments are preferably made from a resilient rubber material. Each spring 12 may be replaced by a rubber rod.
Patent GB-1439773-A (GB)
Title: Treating underwater surfaces
IPC: C09D5/16
Filed: 1973-10-31
Abstract: 1439773 Protecting underwater surfaces B KIRKSAETER and D RASMUSSEN 31 Oct 1973 [19 Dec 1972] 50525/73 Headings B7S and B7M A method of providing protection against fouling to a surface destined to be below water during use comprises applying a wax layer to the surface, optionally over a paint surface, the layer being formed by spraying molten wax on the surface and allowing it to harden to form the layer. The apparatus described includes a container 2 having a chamber 3 for wax and a chamber 4 for a cleaning agent. The chamber is heated and pump 7 directs molten wax or cleaning agent through conduits 8 to a nozzle, for spraying the wax. The Specification makes no claim to the method claimed in claims 1 to 3 of Specification 1,336,103 or to the ship claimed in claim 4 of that Specification.
Patent GB-1528915-A (GB)
Title: Motorcycle frames
IPC: B62K19/08
Filed: 1974-11-21
Abstract: 1528915 Motorcycle frames A DAWSON and G A HARMSWORTH 26 Nov 1975 [21 Nov 1974] 50595/74 Heading B7E A motorcycle frame comprises a pair of substantially flat plates 2 releasably secured together in substantially parallel spaced relationship, the plates having forward sections 9 for the direct releasable mounting of a steering head 12, downward sections 10 for the releasable mounting of an engine 16 and rearward sections 11 for the releasable mounting of a rear wheel suspension 23.
Patent GB-1486292-A (GB)
Title: Method for bulking yarn
IPC: D06F58/30
Filed: 1974-11-22
Abstract: 1486292 Bulking yarn CHALLENGE-COOK BROS INC 22 Nov 1974 [23 Nov 1973] 50743/74 Heading D1L Yarn in bundles is bulked in a tumbler by raising the temp. of the yarn with heated air and steam, continuing the heat and steam treatment until the yarn is heat-set, and then cooling the yarn whilst removing moisture therefrom. The process may be carried out in tumbler 2, disposed within housing 1, provided with an external air circulation system containing a cooling coil 15, a steam injector 35, a blower 22, and a heating coil 26. The heating and cooling coils may be by-passed through ducts 27 and (37), [Fig. 7 (not shown)] respectively. The inlet ducts 25 and 27 are connected to housing 1 by breakable, pneumatic seal 30, [Fig. 3 (not shown)]. The sequence of treatment steps may be as follows. The yarn is first tumbled without air circulation to relax the fibres, and then whilst the tumbling is continued (a) air, heated by coil 26, together with live steam from nozzle 35, is circulated to raise the temp. of the yarn to 180-200F, (b) the temp. is then raised with further heat and steam to 270F to heat-set the yarn, (c) the yarn is then cooled and the moisture content reduced using coil 15, (d) and then the yarn is further cooled with cool air which by-passes the heater duct 25, gate 28 being closed and gate 29 open. Subsequently the circulating air is vented via stack 24 by closing gate 29 and the seal 30 broken to open the tumbler to ambient conditions.
Patent GB-1300916-A (GB)
Title: Magnetic core memory plane
IPC: G11C5/05
Filed: 1970-10-27
Abstract: 1300916 Magnetic storage arrangements FUJI DENKI KAGAKU KK 27 Oct 1970 [27 Oct 1969] 50898/70 Heading H3B A magnetic storage arrangement, Fig. 8, comprises a matrix of apertured cores 1 interconnected by X and Y drive lines 2 and in contact with a transparent plate 8, the X and/or Y lines being wound around the plate so as to form several turns through each core. As shown in Fig. 7, the lines 2 are anchored at each end to terminals 10 on a frame 9. Alternate terminals on the frame may be on opposite faces of the frame. During threading of the cores they are supported on a flat base (3), Fig. 6 (not shown). The transparent plate may be plastics or an electrically coductive glass, and a heat conducting resin or grease may be used between the cores and the plate.
Patent GB-1020080-A (GB)
Title: Improvements in arrangements for compensating drift effects due to temperature variation
IPC: H03L1/02
Filed: 1963-12-30
Abstract: 1,020,080. Oscillator circuits. CSF. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Dec. 30, 1963 [Jan. 4, 1963], No. 51233/63. Heading H3F. Drift in an electronic circuit due to temperature variations is compensated by the change in capacity of a reversely biased semi-conductor diode to which is applied a voltage varying as a function of temperature. The invention is described as applied to a quartz crystal oscillator comprising an amplifier A (Fig. 2, not shown), giving zero phase-shift and with feed-back between its input and output terminals over the quartz crystal-Q. The semi-conductor diode C is connected in series with the quartz crystal Q and has applied to it the variable back bias V from source G. The source G may comprise a potentiometer network formed of resistors R1-R3 (Fig. 3, not shown), in which resistors R1, R2 are connected in series across a constant potential source and resistor R1 is shunted by a thermistor r; the control voltage is taken across resistor R2 via series resistor R3. In a modification (Fig. 4, not shown) giving compensation in the opposite sense, the thermistor is connected across the resistor from which the control voltage is taken. In a further modification a potential varying in one sense is derived from a potentiometer comprising resistors R1-R3 and thermistor r, Fig. 6, and one varying in opposite sense from a potentiometer comprising resistors R4-R6 and thermistor r<SP>1</SP>. The two voltages are combined via diodes D1, D2 which prevent each source from having a modifying effect on the other.
Patent GB-516215-A (GB)
Abstract: 516,215. Step-by-step conveyers BRIGHT-SIDE PLATING CO., Ltd., and KRONSBEIN, J. July 29, 1938, No. 22551. Addition to 483,593. [Class 78 (i)] The duplex carrier system of the parent Specification is arranged to actuate hooks engageable with the carrier bars in such a manner that the bars are intermittently removed from and returned to a fixed support on or above the tanks by a step-by-step feed' motion. Hooks 12 are attached to the ends of bars 14 which are suspended by belts 13 from the top carrier 7 of the duplex system.' Guide rollers 14a mounted on the bars engage vertical rails 15 secured to the lower carrier 10 of the system. The driving gear comprises a three-phase reversible motor 5, an initial reduction gear box 6 having rack-and-pinion connections to the carrier 7, a magnetic clutch 8, and a second reduction gear box 9 provided with rack-and-pinion connection to the carrier 10. The bars are not traversed through the tanks and are returned by hand to the feeding point.
Patent GB-1440304-A (GB)
Title: Transmission line pulse transformers
IPC: H01F19/04
Filed: 1974-11-29
Abstract: 1440304 Transmission-line pulse transformers MULLARD Ltd 29 Nov 1974 51763/74 Heading H1 A pulse transformer comprises a bifilar winding of two or more turns wherein the conductors forming the winding are increased in cross-sectional area from a point about midway on the first turn to a point about midway on the last turn. From Fig. 5, which shows one of the conductors B-G of such a winding, it may be seen that the cross-sectional area, and hence the characteristic impedance, changes at the points C and F midway on the first and last turns. According to the invention, the changes in characteristic impedance from Z 0  to Z 1  and vice versa are such that reflected waves arise at points C, F of phase and magnitude sufficient to cancel the reflected waves which arise through directional coupling between adjacent turns. It can be shown that an incident wave in one turn of the winding gives rise to contradirectional waves in adjacent turns on either side, and that the amplitudes of the incident and coupled waves are related by a coupling factor k= C m /C i  where C m  is the capacitance between adjacent lines and C i  is the self-capacitance of the line. The Specification gives a detailed description of how the contradirectional waves arise and shows that they can be substantially cancelled by waves arising at the impedance discontinuities C, F if Z 0  and Z 1  are such that Z 1 #Z 0 [(1-k)/1+k)]. The formulµ from which the values of Z 0 , Z 1  and k may be found from the dimensions of wire conductor-pairs and printed conductor-pairs are given in the Specification. In the embodiment shown (Figs. 8, 9), the bifilar winding comprises two seriesconnected portions in the form of bifilar helices printed on opposite sides of respective substrates 81, 82 arranged parallel to each other on either side of a spacer 85. The two helices are interconnected by conductors 68,72. The width of the printed conductors is increased at point C halfway on the first turn and decreased to the original width at point F halfway on the last turn. The winding is enclosed in a ferrite pot core 83, 84 accommodated by suitable apertures in the printed circuits and the spacer. A modification using a single bifilar helix is described (Figs. 6, 7, not shown). A further modification using a toroidally-wound twisted wire pair is briefly described. The necessary change in characteristic impedance is provided by a change in the diameter of the wire at the appropriate points.
Patent GB-1444703-A (GB)
Title: Method of treating gas or vapour produced in steel-making
IPC: F27D17/00
Filed: 1974-11-29
Abstract: 1444703 Inhibition of scale HOOGOVENS IJMUIDEN BV 29 Nov 1974 [11 Dec 1973] 51838/74 Heading C7E [Also in Division C1] Lime scale on metal surfaces is prevented from being produced in the washing of calcium oxide carrying gas or vapours by washing with water to which is added a solution consisting of from 0.5 to 2.0 wt. per cent hydrogen chloride and from 9 to 13 wt. per cent ferrous ion at a constant rate. This rate of addition is preferably chosen so as to balance the rate of supply of hydroxide ions to the system. The calcium hydroxide formed is removed by the formation of ferrous hydroxide and calcium chloride.
Patent GB-1522687-A (GB)
Title: Method of supporting drivages in mines and tunnels driven by shotfiring
IPC: E21D11/14
Filed: 1975-12-19
Abstract: 1522687 Mine and tunnel linings RUHRKOHLE AG 19 Dec 1975 [24 Dec 1974] 52015/75 Heading E1F In a method of supporting a mine or tunnel driven by shotfiring, a crown segment canopy is preassembled from segments 4, 5 of crowns 16-20, distance pieces 13, 14 and at least one lagging mat 21, preferably made from wire mesh. After assemblage e.g. at A 3  and using an erector, the canopy is conveyed into freshly advanced drift A 1  and lifted to the position indicated by chain lines so that distance pieces 25, 26 and lagging mats 22 can be connected between the canopy and the previously set assembly in drift A 2 . The canopy is then further raised into contact with the roof (the position indicated by solid lines), and additional segments 6 and legs 3 are positioned, adjustment being made so that the cross-section of each individual support adapts to the local crosssection of the drift, the periphery of each support contacting the rock at several points, and no backfilling being necessary. As shown, the adjustment for each support is provided by a hydraulic leg 3 acting through a butt cap 2. Alternatively the length of overlap between segments may be varied or the legs and additional segments may be hinged to the canopy and straightened until the supports make tight contact with the rock.
Patent GB-1241809-A (GB)
Title: A method for manufacturing a semiconductor device
IPC: H01L27/00
Filed: 1968-11-04
Abstract: 1,241,809. Semi-conductor devices. HITACHI Ltd. 4 Nov., 1968 [6 Nov., 1967], No. 52130/68. Heading H1K. In the manufacture of a semi-conductor device, after formation of a first inclusion of one conductivity type by diffusion impurity into one face of a substrate of the opposite type, there are simultaneously formed two further spaced inclusions of the one type, one of which overlies at least part of the first inclusion and of the substrate. In one embodiment, Fig. 2C, the first diffusion, of boron, through oxide masking forms a P+ zone 12<SP>1</SP> in a 111 or 100 face of an N type silicon wafer. The second diffusion, also of boron, forms circular and annular P type zones which constitute the emitter 12 and collector respectively of a lateral transistor. In an alternative form the emitter and collector are of strip form. A lateral transistor of the described type and a complementary double diffused NPN transistor may be incorporated in an integrated circuit. The two transistors are simultaneously formed in wall isolated portions of an N type epitaxial layer over N + inclusions diffused into a P type substrate. The P + part of the emitter of the lateral transistor and the isolation walls are formed simultaneously in a first diffusion step, then the emitter and collector proper and the base of the complementary transistor are formed in a second diffusion. Finally, a third diffusion is effected to form the emitter of the complementary transistor and heavily doped base and collector contact rings of the respective transistors.
Patent GB-1148548-A (GB)
Title: Method and apparatus for determining the direction of motion of a moving object
Inventor: AUSMAN JOHN STANLEY
IPC: G01S13/62
Filed: 1967-11-16
Abstract: 1,148,548. Determining bearings. LITTON INDUSTRIES Inc. Nov. 16, 1967 [Dec. 29, 1966], No.52280/67. Heading G1F. Apparatus for determining the direction of motion of a moving object comprises means 16 for producing a signal proportional to the time rate of change of the distance R between a fixed point and the object and means 14 for producing a signal proportional to the velocity v of the object. If # is the angle between the velocity vector v and the distance vector R then it follows that v cose + R = O where R is the time rate of change of the distance R. The means 14 may comprise an accelerometer whilst the means 16 may be a radar system. A motor 20 is driven by the output of an amplifier 18 and its shaft is connected to a resolver which generates a signal proportional to the cosine of the angle of deflection # of the shaft. A multiplier 24 supplies a voltage proportional to v cos# to the amplifier so that the motor is driven by a voltage proportional to v cos # + R. The shaft is rotated until the amplifier output is zero, i. e. until the rotational angle of the shaft equals # and this angle may be transmitted to an indicator. A compass 26 measures the azimuth angle and with respect to North of the velocity vector and this angle is added to the angle # by a mechanical sumination device 28 to give the azimuth angle y of the distance vector R.
Patent GB-1408251-A (GB)
Title: Toy
IPC: A63H1/30
Filed: 1973-11-12
Abstract: 1408251 Spinning toys T G VAN RHYN and D B SAAIMAN 12 Nov 1973 [30 Nov 1972] 52371/73 Heading A6S A spinning toy comprises a handle 20 from which depend strings 16, 18 to be wound onto and unwound from pulleys 12, 14 as they rise and fall. A frame 24 secures the pulleys 12, 14 together and is so dimensioned that the pulleys and frame can pass through a hole 26 in the handle.