baber/WOPTO huggingface dataset:
Patent GB-822356-A (GB)
Title: Improvements in or relating to two zone breeder nuclear reactors
Inventor: TONGUE RONALD GEORGE
IPC: G21C1/28
Filed: 1956-07-12
Abstract: 822,356. Nuclear reactors. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. July 5, 1957 [July 12, 1956], No. 21632/56. Class 39(4). In a two-zone breeder reactor the fission zone is surrounded by a vessel containing the fertile material. Separate liquid coolants are used for the fission and fertile zones respectively, the fission zone coolant having a higher vapour pressure than that of the fertile zone. The fission zone container is constructed to withstand its own internal pressure while the outer fertile zone container is of simplified construction to withstand only the lower pressure of the fertile zone coolant. The fissile core may comprise fuel elements or a homogeneous liquid coolant with the fissile material and moderator dissolved or suspended therein. Similarly, the fertile zone may be in the liquid homogeneous form. The materials employed may be, fissile core, uranyl sulphate in heavy water ; fertile zone, slurry of thoria in terphenyls.
Patent GB-767331-A (GB)
Title: Improvements in side delivery rakes and/or swath turners
Inventor: BAMFORD HENRY VINCENT
IPC: A01D78/16
Filed: 1954-07-24
Abstract: 767,331. Side-delivery rakes. BAMFORDS, Ltd. July 14, 1955 [July 24, 1954], No. 21675/54. Class 6(3). In a side-delivery rake, of the type having rake-wheels arranged in oblique echelon formation, each rake-wheel 19 is driven by a driving member or shaft 33 rotatable on an axis parallel to that of the wheel, each driving member being driven from the power take-off of the towing tractor, other power-driven means, or the landwheels of the device, each rake-wheel being rotatably mounted on one end of an arm 22, the other end of which is freely rotatable about the axis of the driving member, so that each wheel is positively driven but can float vertically by virtue of the pivoted arm 22. The implement frame comprises elongated members 11, 12 mounted on land-wheels 13, 14, 15, the foremost of which is steerably secured to a drawbar 17 attached to the towing tractor and the other wheels 14, 15 are lockable in various angular positions. Upon the rear member 11 are mounted parallel bearings 24 for sleeves 23 carrying the arms 22, the driving shafts 33 passing through the sleeves and being drivingly connected through bevel gears 32 with a longitudinal shaft 31 coupled to the power take-off of the tractor. The other end of each shaft 33 is coupled by a step-down-ratio chain-drive 35 to a sleeve 20 integral with the hub of the rake-wheel and carried on a stub axle 21 on the free end of the arm 22. Each rake-wheel assembly is pivotally suspended from the chassis-member 11 by a spring 26. In a modification, Fig. 4 (not shown), a two-stage belt drive replaces the bevel gears 32 and the chain-drive 35, and, in a further modification, for swath-turning, a second series of rakewheels is carried by the member 12 and is driven by a second longitudinal drive-shaft coupled to the power take-off. Specification 712,992 is referred to.
Patent GB-320937-A (GB)
Title: Process of and apparatus for the production of normal magnesium carbonate from magnesites
IPC: C01F5/24
Filed: 1928-07-26
Abstract: 320,937. Hughes, T. July 26, 1928. Pigments.-Normal magnesium carbonate and other magnesium compounds are obtained from dense hard varieties of magnesite, which remain dense after successive treatment with small batches of dilute mineral acids and contain both basic and non-basic carbonates and impurities such as iron compounds, silicates, lime compounds &c., by a process comprising their treatment with mineral acid under conditions precluding substantial disintegration of the magnesite and permitting the selective action of the acid on the constituents of magnesite. Suitable magnesite in large lumps is treated with dilute sulphuric acid at an initial temperature of 60‹ F. A form of vessel for this process comprises a shallow dish divided into two portions and a channel by two perforated partitions arranged six inches apart. The lumps of magnesite are retained in the spaces outside the channel towards which the bottom of the vessel slopes from the sides. After four to five hours, the still acid solution of magnesium sulphate containing normal magnesium carbonate in suspension is circulated by a suction pump into a high-level terrace cascade of separator tanks. A strainer placed before the highest tank removes small pieces of siliceous matter. The magnesium carbonate settles in the separator tanks and the liquid from the lowest tank may deliver into a channel fixed round the top of the reaction vessel. At the end of the reaction, the products are pumped into a second group of separator tanks and the normal magnesium carbonate deposited is washed and dried. The normal magnesium carbonate so prepared is suitable for the production of paints, protective, and fire proofing compositions.
Patent GB-394502-A (GB)
Title: Improvements in valves for infants' feeding bottles
IPC: A61J9/04
Filed: 1932-08-03
Abstract: 394,502. Valves for feeding-bottles. CRESER, A. A. T., 3, Manor Park, Richmond, Surrey, and BAKER, G. B., 29, Glebe Avenue, Enfield, Middlesex. Aug. 3, 1932, No. 21751. [Class 135.] A valve device for an infant's feeding bottle, of the kind in which the air-admission passage is determined beforehand by setting an adjustable device, is characterized by a rotary control member e of rigid material mounted on a seating d arranged upon or inside the entrance to the bottle in such a manner that by its rotation it progressively varies the passage for the admission of air, the rotary control member cooperating with an air passage h which is provided at its inner end with a non-return valve i. By the rotation of the member e an aperture e<1> therein may be brought to any desired position over a groove d<1>, of progressively increasing depth, in the seating disc d, and thus vary the amount of inlet air which passes through the passage h and the rubber-sheathed non-return valve i. The valve device is held in position by a spring wire c. In a modification, Fig. 8, the rotary plug k is provided with a number of grooves k<6>, of varying depth, connected by a channel a<3> with the passage h governed by the valve i. In still further modifications a ground glass plug is furnished with a groove of varying depth which coacts with an aperture through the ground neck or in the ground top end of the bottle. The passage h preferably opens on to a "flat" beneath the rubber sheath i which may wholly or partly cover the end of the members f<1>, m<1>. In a still further modification, the aperture e<1> is governable by a rotary cam-shaped plate which may be turned to mask, wholly or partly, the aperture.
Patent GB-897816-A (GB)
Title: Improved means for determining tape position in relation to time
IPC: G11B27/34
Filed: 1960-06-22
Abstract: 897,816. Pulleys. AMPEX CORPORATION. June 22, 1960 [July 29, 1959], No. 21908/60. Drawings to Specification. Class 80 (1). [Also in Group XXXVIII] A magnetic tape indexing apparatus comprises a counter having a drum which is driven by the tape and which is provided with grooves to prevent air being trapped and to thereby ensure positive drive, the grooves being made in the form of a helix so that localized wear along parallel paths on the tape is avoided.
Patent GB-387334-A (GB)
Title: Improvements relating to means for carrying reels of paper in printing and other machines
IPC: B65H75/24
Filed: 1931-07-31
Abstract: 387,334. Feeding webs. CRABTREE & SONS, Ltd., R. W., Water Lane, and SHAW, J., 353, Oakwood Lane, both in Leeds. July 31, 1931, No. 21957. [Class 100 (i).] Means for carrying reels of paper in printing and other machines comprises a supporting spindle mounted in a supporting frame, a cylindrical extremity to the spindle for insertion within a reel, dogs mounted to be radially and slidably movable in seatings in the cylindrical extremity, and means positively acting on each of the dogs to move them outwardly into engagement with the bore of the reel. A tubular spindle a, mounted, in the reel frame e by means of ball bearings b, c and a thrust collar d, is provided with a flange a<1> which terminates in a reduced concentric support a2. The support a<2> is preferably cylindrical and is provided with a number of equidistant radial slots which receive wedge-shaped blocks i the lower faces of which are inclined and contact with corresponding faces in a cylindrically shaped axially movable nut g. The nut g is received in a cavity formed in the support a<2> and is engaged by a screwed rod f which passes through the tubular spindle a and is provided at its other end with a hand-wheel h. The wedge blocks i are maintained in position by a split ring j which is received in a peripheral annular groove in the support a<2> and in corresponding .slots provided on the upper surfaces of the blocks. A cylindrical cavity is provided in each of the wedge blocks i beneath the split ring j for the reception of a helical spring k, the upper end of which engages beneath the split ring j, and thus tends to maintain the wedge blocks upon the respective inclined surfaces of the nut k. An axial slot provided near the outer end of the nut g is engaged by a pin l to prevent the nut g being wound off the rod f. The engagement of the inclined surfaces on the nut g with the wedge blocks i prevent rotation of the nut. The reel may be braked through the intermediary of the reel grip by mounting a braking pulley m adjacent the hand-wheel h.
Patent GB-717328-A (GB)
Title: Wide-band thermionic valve amplifier
Inventor: DAVIES ERIC
IPC: H03F1/50
Filed: 1951-09-19
Abstract: 717,328. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 23, 1952 [Sept. 19, 1951], No. 21987/51. Class 40 (6) A wideband amplifier comprises main and auxiliary amplifiers A1, A2 respectively, Fig. 1, with mutually inverse frequency/attenuation characteristics, in which the signals el are applied to both and energy is also fed from the output of the auxiliary amplifier A1 to the input of the main amplifier, in phase with signal e1, so as to maintain the frequency/attenuation characteristic constant. Positive feedback may be applied to the auxiliary amplifier A2 and its frequency/ attenuation characteristic. determined by an output network R2, C2 which is the inverse of that, R1, Cl, of the main amplifier. Alternatively, Fig. 2 (not shown), the characteristics of the auxiliary amplifier may be determined by a stage provided with negative feedback from a cathode network having a frequency/attenuation characteristic similar to that of the main amplifier. In an embodiment, Fig. 3, the main amplifier V1 is cathode-driven from the auxiliary amplifier V2 and the valves are also coupled anode-to-grid by a network R4, C2, R2 having characteristics which are the inverse of those provided by the output resistance R1 and shunt stray capacity C1. In a further embodiment, Fig. 5, the valves V1, 2 are separately biased. by returning the grid leaks to tapping points on the common cathode resistance R3, and overall negative feedback is provided from a part, R5, of the load of a succeeding cathode-follower stage V3, being applied to the grid of valve V1 via a blocking condenser and resistance R2.
Patent GB-849704-A (GB)
Title: Yarn tensioning device
IPC: B65H59/22
Filed: 1958-07-09
Abstract: 849,704. Electro-magnetic yarn tensioning  devices. LINDLY & CO. Inc. July 9, 1958 [Jan. 2, 1958], No. 21992/58. Class 120(2) and 142(1).  Yarn y passing between two discs 3, 4 and round a central member 2 is tensioned by the pressure between the discs caused by an electro magnet 5 which attracts the top disc. The member 2 may be of a ceramic composition or chromium plated brass. The lower disc 4 is non-magnetic and may be chromium plated brass. The upper disc 3 may be of steel. Several tension devices 1a-1d, may be connected in parallel and controlled by a potentiometer 39. Individual adjustment is provided by resistances 41. The current may be A.C. which is passed through a rectifier 38 to provide a uni-directional pulsating current or alternatively a constant D.C. supply may be used. When used on a warping machine, the tensioning devices are in circuit with a stopmotion so that when the machine is stopped extra current is supplied to the tension devices thereby increasing the force on the yarn and preventing overrun or slackness.
Patent GB-1098180-A (GB)
Title: Printing plates and method of manufacture thereof
IPC: B41N1/10
Filed: 1965-05-25
Abstract: A lithographic printing plate comprises a base sheet, a sublayer on the base-plate, a copper ink-receptive layer electro-plated on the sublayer from an acid bath containing a crystal-growth reducing agent, and a non-porous water-receptive chromium layer on the copper layer.  The chromium is etched away to expose the parts of the copper layer corresponding to the matter to be printed. The base sheet may be paper, synthetic plastic, aluminium or preferably steel.  The steel base is degreased and a copper or nickel sublayer is electro-plated thereon, an alkaline bath being used for the copper layer.  If a bright finish is required for the printing plate, a commercial brightener is included in the nickel electro-plating bath. The acid bath for producing the copper ink-receptive layer comprises copper sulphate and sulphuric acid.  If a bright finish is desired, crystal growth reducing agents such as animal glue or agar, or a commercial brightener are added.  For a matte finish, the crystal growth reducing agent used is a double metal salt such as aluminium potassium sulphate or sodium potassium tartrate.  The final chromium layer is applied by electro-plating in a bath containing chromic acid (CrO3) and sulphuric acid, and will have a matte or bright surface depending on the surface of the copper layer underneath the chromium.
Patent GB-208573-A (GB)
Title: Apparatus for the production of sponge iron and other metallic products
IPC: C21B13/10
Filed: 1922-08-14
Abstract: 208,573. Thornhill, E. B., and Anderson, H. G. S. Aug. 14, 1922. Charges, agitating; cooling discharged materials; hearths; metallurgical furnaces; retort furnaces; tunnel furnaces.-In a furnace particularly adapted for the production of sponge-iron from ores &c., the charge is supported on a rotary hearth 1 by a bed 8 of material such as granular coke non-adherent to the reduced iron. The hearth is rotated slowly by a motor 9 through gearing 12, 13, and its lower surface is open to the atmosphere, a seal 40 being provided. The charge, is heated by radiation only from gas fired combustion tubes 44 formed of carborundum of similar material, and suspended in the reducing chamber 4 from beams 51 located outside the furnace. Stationary waterjacketed rabbles 19 with blades 23 preferably of graphite are arranged to agitate the charge and to discharge the product to a hopper 30 and waterjacketed conveyer 32. The rabbles are arranged to slide through openings in the furnace walls under the influence of rack and pinion gearing 26, 27. The charge is introduced through a conduit 15. Openings for an inspection tube and a pyrometer 49 are provided. In a modification a single combustion chamber is arranged extending above the hearth, and a central discharge opening is provided in the hearth. In a further modification the hearth is annular in form and in another form an endless belt conveyer is provided to carry the charge, through the reducing chamber. In another arrangement, Fig. 10, the heating means comprise carborundum tubes 99 packed with divided carbon 98 and connected with any suitable source of electric current. Specification 208,572, [Class 72, Iron &c.], is referred to.
Patent GB-699171-A (GB)
Title: Improvements in and relating to lug straps for looms
IPC: D03D49/38
Filed: 1947-08-08
Abstract: 699,171. Compound sheet materials. DAYTON RUBBER CO. Aug. 8, 1947. [Sept. 12, 1938] No. 22069/47. Drawings to Specification. Class 140. [Also in Group IX] A strap forming a part of a loom may be made from leather, loose fibres impregnated with adhesive, phenolic resins, a rubberized, glue treated, synthetic resin or thermosetting resin impregnated fabric. The strap may comprise several layers of fabric heavily impregnated or may comprise a heavy closely woven multi-ply webbing.
Patent GB-1143382-A (GB)
Title: Improvements in or relating to electrical apparatus for comparing the pulse repetition rates of two input pulse signals
IPC: H03K21/02
Filed: 1965-05-25
Abstract: 1,143,382. Electronic counters. GENERAL ELECTRIC CO. Ltd., P. COOKE, and R. G. WICKER. 25 May, 1966 [25 May, 1965], No. 22108/65. Heading G4A. [Also in Division H3] In apparatus for producing a series of pulses of which the repetition rate is equal to the difference between the repetition rates of two input signals, the input signals are fed via a gate to an output line, the gate being opened and closed in such a way that each pulse of the higher frequency input (except the first following a pulse of the lower frequency input) is gated to the output line but the output is inhibited by coincident input pulses. As shown, pulses on input lines 15, 16 are respectively steered by gates 19, 25 and 20, 26 to output terminals 21, 22. Each input pulse on lines 15, 16 is differentiated at 13, 14 so that its trailing edge can set or reset the bistable circuit comprising the reciprocally coupled pair of transistors 1, 2. The outputs from the bistable circuit 1, 2 control the gates 19, 25; 20, 26 in such a way that the gate receiving the higher frequency pulse train provides an output the frequency of which is equal to the difference between the two input frequencies, whilst the gate receiving the lower frequency pulse train provides no output. Complementary direct current outputs indicative of the phase difference between equal frequency pulse trains fed on input lines 15, 16 are available at the collectors of transistors 1, 2 via lowpass filters 36 (only one shown). Inhibiting coincident pulses.-Wholly or partly coincident input pulses at 15, 16 provide an output from the AND circuit 31, 32 which turns on transistor 27 so as to enable diodes 34, 35 to inhibit the output at 21, 22.
Patent GB-446646-A (GB)
Title: Improvements relating to the production of waterproof compositions of asbestos and cement
IPC: C04B28/18
Filed: 1934-07-28
Abstract: A composition for making water-resistant asbestos-cement products such as plates and pipes comprises asbestos, cement and a substance containing silica, alumina and iron oxide, separately or together, amounting in the aggregate to twice or more than twice the quantity of lime in the cement.  The composition is formed into articles and hardened by steam under pressure. Examples of suitable substances for addition to the cement are clay which has been baked at a temperature of 600-800 DEG  C., quartzite, chalcedony, opal, kieselguhr, sand stone, precipitated silicic acid, Si-substance, and quartz converted by heating to the amorphous state.  In an example clay containing 98 per cent of silica, alumina and iron oxide and 2 per cent of lime is heated to 600-800 DEG  C., and 55 parts, finely ground, are mixed with 45 parts of Portland cement containing 65 per cent of lime, and 15-20 parts of asbestos fibre.  The mass is mixed with water, formed into slabs and hardened under steam pressure.  Specification 367,815 is referred to.
Patent GB-1180663-A (GB)
Title: Repetitive pulse detector
IPC: G01S13/78
Filed: 1967-05-12
Abstract: 1,180,663. Pulse radar. INTERNATIONAL STANDARD ELECTRIC CORP. 12 May, 1967 [17 May, 1966], No. 22154/67. Heading H4D. In apparatus for detecting pulses of a predetermined repetition period t 1  interleaved in a random pulse train, the pulse train is recorded by means 13 on a medium 10 of such length that it is traversed in a period slightly different from t 1 , an integrator 14 is coupled to a read-out means 11 and a threshold detector 15 is connected to the integrator. The embodiment is for an airborne DME receiver (in a TACAN system) taking ground responses as pulse pairs decoded into single pulses, the airborne transmitter being triggered by pulses, Fig. 2A, once per revolution of a drum 18 and the integrator being a ringing circuit, Fig. 2C; when the bursts of the latter exceed a threshold level the output of reading head 11 is gated, Fig. 2E, to avoid drum saturation and the output, Fig. 2D, of circuit 15 is a set of pulses for distance-measuring. The relative speeds of drums 10 and 18 is such that subsequent reply pulses are recorded at a position slightly different from that of previous ones, Fig. 2B.
Patent GB-429133-A (GB)
Title: Improvements in or relating to automatic steering devices
IPC: G05D1/08
Filed: 1934-07-31
Abstract: 429,133. Steering automatically. ASKANIA - WERKE AKT. - GES. VORM. CENTRALWERKSTATT DESSAU UND C. BAMBERG - FRIEDENAU, 87, Kaiserallee, Friedenau, Berlin. July 31, 1934, No. 22377. Convention date, Aug. 2, 1933. [Class 4] In automatic steering - devices, particularly for aircraft, the deflections of a system responsive to angular deviation, velocity, or acceleration are transmitted to the force controller or relay of a steering motor through the intermediary of a damped resilient connection comprising two relatively rotatable levers 25, 26 connected by a spring coupling and a damping-device. As shown, a jet tube 2, which moves in front of two inlet nozzles and from which issues a stream of air under pressure to operate a rudder motor for controlling an aircraft rudder, is rotatably mounted about a vertical axis in bearings in a plate 3 and in a supply tube 4 provided with a rotatable end 6. A forked bracket 7 clamped on the tube 2 receives one end of a lever 10 rotatable about an axis 11 and adjustably secured to the bracket 7 by means of a U-shaped clamp 12. The tube 2 is adjusted from a capsule 15 connected through links 17, 18, a lever 20 and a link 28 to the lever 26, the pivot 24 of which is coaxial with that 23 of a lever 25 connected by a link 27 to the lever 10. The levers 25, 26 are normally held one above the other by a spring 33 which connects levers 31, 32 pivoted to a carrier 34 on a pivot 40 housed in a guided-adjustable block 41. The levers 31, 32 are provided with rollers 37, 38 and the spring 33 may be selectively placed between any of the holes 60, 61. The block is adjusted by screw-and-nut mechanism which is locked in any position by a spring-pressed pawl engaging a pinion. The levers 20, 10 are further connected by a damping-device and in one form the piston and cylinder of a dashpot are connected respectively to the levers 20, 10. Thus when the tube 2 is moved the levers move in register with one another until the tube 2 engages a stop when the levers separate stressing the spring 33 and moving the piston in the dashpot cylinder ; when the aircraft approaches the desired course the levers 25, 26 move in their separated positions due to the action of the dashpot and the rudder is held in a reversed steering- position until the dashpot gradually returns to its normal position. Specification 397,805 is referred to.