baber/WOPTO huggingface dataset:
Patent GB-1202388-A (GB)
Title: Improvements in magnetic transducer head
IPC: G11B5/235
Filed: 1967-11-03
Abstract: 1,202,388. Magnetic transducer heads. GENERAL ELECTRIC CO. 3 Nov., 1967 [9 Nov., 1966], No. 50093/67. Heading G5R. The magnetic transducer head for recording or erasing includes a core comprising a pair of core pieces each consisting of laminations of magnetic material, and a magnetic spacer disposed in a gap defined by opposed spaced faces of the core pieces, the spacer comprising laminations of the same magnetic material as the core piece laminations, the planes of the spacer laminations being substantially perpendicular to the general plane of the core; the spacer is saturable at a pre-determined fluxdensity less than the flux density at which the core is saturable, so that, subsequent to the use of the head, remanent magnetic flux in the core at less than the pre-determined flux density is shunted directly between the opposed spaced core faces and remanent magnetic flux fringing outwardly of the gap is reduced. Unwanted erasure, or distortion of previously-recorded information, is thereby prevented. As shown, the laminations of the spacer element 36 may have a thickness of 0À002 inch and be bonded with a thermosetting adhesive (each layer being, e.g., 0À0001 inch thick). The adhesive layers are too thin to be effective as "head gaps" especially having regard to the low reluctance provided by the comparatively large area of contact between adhesive and lamina. As shown, the spacer element 36 is of the same width as the core legs 14 and 16, but has a greater vertical height than the pole face 26 of leg 16 (which is tapered). The reluctance of the spacer element may be varied by varying its height and width: specifically, it may occupy only a portion of the gap 30. The reluctance and dimensions of spacer element 36 are such that it becomes substantially saturated during a recording or erasing operation, while remoter parts of the magnetic circuit having a larger cross-sectional area remain unsaturated. Preferably the strength of signal applied to coil 22 is sufficient to saturate the oxide or metallic layer 33 of magnetic tape 34. The back gap (not shown) between the C-shaped leg 16 and the I-shaped leg 14 at the lower end of the head has the same length as, but is several times the height of, the gap 30, and is filled with a non-magnetic material. It is stated that a reading head of equivalent construction designed to read information previously written with a particular recording head according to the invention would need to have its spacer made of a magnetic material different from the magnetic spacer material of the particular recording head.
Patent GB-1198799-A (GB)
Title: Improvements in or relating to Lead Acid Batteries
Inventor: COOPER NORMAN WILLIAM
IPC: H01M10/54
Filed: 1966-11-09
Abstract: 1,198,799. Alkaline treatment of a charged lead-acid battery. N. W. COOPER. 31 Oct., 1967 [9 Nov., 1966], No. 50163/66. Heading H1B. The charge-holding ability of a lead/acid battery is restored by charging the battery, removing the free acid electrolyte and replacing it with a strongly alkaline solution, and subsequently removing the alkaline solution, washing the battery and refilling it with acid electrolyte. The alkaline solution may contain NaOH or KOH amounting, e.g., to 1 pound per gallon of water.
Patent GB-1267290-A (GB)
Title: 4-substituted 2-amino-1,3,4-thiadiazolones-(5) and their use as herbicides
Inventor: SASSE KLAUS
IPC: A01N43/824
Filed: 1970-10-23
Abstract: 1,267,290. 2 - Amino - 1,3,4 - thiadiazolones. FARBENFABRIKEN BAYER A.G. 23 Oct., 1970 [25 Oct., 1969], No. 50474/70. Heading C2C. Novel thiadiazolones of the formula in which R represents alkyl or alkenyl groups having 1-8 carbon atoms and optionally substituted by alkoxy, cycloalkyl, cycloalkenyl, furyl or aryl group which aryl group may be substituted by halogen, alkyl, dialkylamino, alkoxy and/or haloalkyl, or R represents a C 3-12  cycloalkyl group or a anaryl group optionally substituted by alkyl, haloalkyl, nitro and/or alkoxy groups, and the known compound in which R is phenyl, are prepared by condensing a thiosemicarbazide of the formula R-NH-NH-CS-NH 2  with phosgene, preferably at temperatures in the range 25-100 C. in the presence of water. The reaction medium may also contain a water immiscible organic solvent. Examples relate to the preparation of the 4-phenyl, cyclohexyl, propyl, ethyl, isopropyl, butyl, benzyl and 4<SP>1</SP>-chlorobenzyl compounds; many other suitable starting thiosemicarbazides are specified. 1-Cyclohexylthiosemicarbazide is obtained by NaBH 4  reduction of cyclohexanone thiosemicarbazone. The thiadiazolones possess herbicidal properties and are used in conventional forms as pre- and post-emergence weed-killers.
Patent GB-1467498-A (GB)
Title: Apparatus for counter current gas-solid contact
IPC: B01D53/06
Filed: 1974-11-21
Abstract: 1467498 Gas/solid contacting apparatus; gas filter SUPERIOR OIL CO 21 Nov 1974 [24 June 1974] 50515/74 Headings B1L and BIT A gas/granular solid contacting apparatus (e.g. for filtering flyash or absorbing SO 2 ) comprises a closed chamber having a solids entry section (62 which may be fed by hopper 70 via gas-tight valve 76), above a plurality of louvres (96, 104, 108) which define troughs (95, 102, 106) which direct the countercurrent flow of gas and granular solid, receptacle means (114) dispersed below the troughs to receive measured quantities of solid therefrom, the receptacles being movable from a receiving position to a dumping position above a solids discharge section 110; the gas inlet (168) being situated below the troughs and the gas outlet (92) above. A rotatable rake (82) may be provided within the chamber to maintain a generally horizontal upper surface to the solids bed.
Patent GB-1523637-A (GB)
Title: Working of materials
IPC: B02C17/00
Filed: 1975-12-11
Abstract: 1523637 Ball mills; magnetic mixing J N KUZNETSOV and V A AMBROSIMOV 11 Dec 1975 50823/75 Headings B1C and B2A A ball mill has magnetically-influenced grinding media, e.g. magnetic elements, and comprises at least one chamber 1 Fig. 1 enveloped by an electric winding 3 which is arranged to produce a variable magnetic field in the chamber. The chamber height is 1.1 to 1.5 of the height of the layer of magnetic elements. Where there are several chambers their total volume is 0.8 to 1.0 of the effective volume of the magnetic field. Material is fed in via a hopper 7 and discharged via a sieve 6. An additional winding 4 and voltage regulator 5 serve as an adjustable magnetic gate altering the height of the media layer. The chamber may be made of rubber and angled to the horizontal and gas e.g. air may be supplied to alter residence time. The grinding media may be spherical or ellipsoidal and of magnetically hard ceramic or metallic materials e.g. barium hexa ferrite, manganese-aluminium, samarium cobalt, ticonal, alnico. Examples of cement, pigment and paint grinding and CO 2  mixing or absorption are described in the latter case the magnetic elements are cylinders coated with polyurethane resin. Various forms of chamber and winding arrangement are shown including a chamber divided by partitions Fig. 6 (not shown) and a plurality of chambers in series Fig. 7 (not shown). In one embodiment the chamber 1 is arranged between two flat annular windings 3' Fig. 4 with the chamber surrounded by the feed bin or hopper 7, the upper winding 3' being protected by a conical member 9.
Patent GB-1146680-A (GB)
Title: Improvements relating to water turbines
Inventor: MATHEWS RONALD VERNON
IPC: F03B3/18
Filed: 1965-12-01
Abstract: 1,146,680. Hydraulic turbines. ENGLISH ELECTRIC CO. Ltd. Nov.18, 1966 [Dec.1 1965], No.50988/65. Heading F1T. In a Francis or other water turbine in which guide vanes 14 are angularly adjustable into positions in which their vertical edges 36 engage to form seals, the lower bearing housing 28 of each vane can be lifted to bring ring portions 32, 34 into sealing contact with the lower edge of the vane and so as to lift the vane into sealing contact with a part of the top cover 26 of the turbine casing. The part has a contour matching that of the upper edge of the vane. The bearing housings 28 may be lifted by hydraulic cylinders. Alternatively, pressurized water drawn from the spiral inlet casing may be admitted to spaces 30 for this purpose. The sealing surfaces of the cover 26 and ring portions 32, 34 may be formed by rubber or other flexible rings. Rubber sealing strips may be fitted to one or both edges 36 of each vane.
Patent GB-1007676-A (GB)
Title: Catalytic reforming
IPC: C10G35/095
Filed: 1963-12-24
Abstract: A naphta feedstock is reformed in the presence of a crystalline aluminosilicate containing metallic cations of which at least 50% are a rare earth metal.  The catalyst which preferably contains at least 0.5 equivalent of metallic cations per gram atom of aluminum and a silicon to aluminium atomic ratio of at least 1.5 is prepared by treating a precursor, e.g. an alkali metal aluminosilicate, with rare earth metal ions followed by heating in air or an inert gas at 400-1500 DEG  F. or in atmospheric steam at 800-1500 DEG  F. or 10-200 atmospheres steam at 350-700 DEG  F.  Other metallic ions present should preferably be polyvalent, alkali metals being present in amounts less than 0.25 equivalent per gram atom of aluminium.  The catalyst may be embodied in a porous matrix, preferably an oxide, which may contain promoters, the catalyst forming 2-95% by wt. of the composition, and may also contain 0.1-15% wt. of a hydrogenating-dehydrogenating component. Reforming is effected at 500-1050 DEG  F., 0.1-25 atmospheres, preferably atmospheric pressure, and 0.05-40 vol./vol./hr. in the presence or absence of hydrogen, e.g. up to 20 mols per mol of naphta.  The catalyst may be regenerated by oxidation. Specification 1,007,675 is referred to.
Patent GB-1368604-A (GB)
Title: Static relaying circuit
IPC: H03K17/795
Filed: 1970-10-29
Abstract: 1368604 Fail safe switching circuits WESTINGHOUSE BRAKE & SIGNAL CO Ltd 20 Sept 1971 [29 Oct 1970] 51334/70 Heading H3T A fail-safe switching circuit comprises an insulated coupler operable with no conductive connection between its input and output and adapted to pass on a signal in the form of an alternating high and low conductivity condition, the coupler being enabled and disabled in response to a signal representing the presence or absence of a further alternating conductivity condition. In Fig. 1, 1-19 corresponds with the operating coil of a relay and 20-28 the contacts. In the presence of an alternating high and low conductivity condition at the input terminal 16 having an alternating frequency equal to the resonance frequency of circuit 10, 11 the rectifier 12, 15 produces a negative voltage which cuts off transistor 18 but which is connected through diode 17 to the output terminals A. When the alternating condition is absent or of the wrong frequency transistor 18 conducts to apply a positive voltage to A. Terminals A and B are connected with one or other polarity to diodes 27 which emit a characteristic light when forwardly biased so that an alternating high and low conductivity condition at input terminals 20 is passed on via a phototransistor 28 sensitive to the characteristic light, to output terminals 23. The polarity of connection of A and B to the diode circuit determines whether the condition is passed on by the presence or absence of the alternating condition at terminal 16. The resonant circuit and rectifier may be replaced by a non-resonant rectifier system (Fig. 6, not shown) and the circuits may be connected in parallel or cascade (Figs. 3A and 3B, not shown). In addition, by feeding back an output to an input the circuit may be self holding. The alternating conductivity condition at terminals 20 and 22 may be provided by a phototransistor illuminated by a diode pulsed by a multivibrator (Fig. 2, not shown) and the diode path may include a push-button switch (at 53, Fig. 4, not shown). The output from 23 to 25 may be converted to a D.C. signal by a converter (Fig. 5, not shown) which may be selective to the alternation frequency.
Patent GB-1362794-A (GB)
Title: Electric control system for a rolling mill
IPC: B21B37/46
Filed: 1971-10-29
Abstract: 1362794 Automatic control of rolling mills ALUMINIUM FOILS Ltd 29 Oct 1971 [29 Oct 1970] 51459/70 Heading G3R [Also in Division B3] In a "coarse and fine" control system for a rolling mill, the output gauge is corrected by either a continuous or pulse signal according to whether the output gauge error is above or below a predetermined value respectively. In an embodiment, the output gauge of an aluminium foil strip is measured by an eddy current transducer 15 and fed to an error correction circuit ECC. If for instance the output gauge rises above its desired value, a micro-circuit amplifier module SPHA, also Fig.4 (not shown), triggers on when the output gauge signal exceeds a predetermined value, set on its associated potentiometer, energizing  relay SPHR to apply short correction pulses to a roll gap or rolling speed regulator, thus reducing the output gauge. If the correction rate is too slow i.e. the gauge error further increases, amplifier LPHA is triggered on to energize relay LPAR, applying longer pulses to the gauge regulator. A still further increase in gauge error triggers on amplifier CCHA energizing relay CCAR and applying a continuous signal to the regulator. If the actual output gauge falls below the desired value, amplifiers SPLA, LPLA, CCLA act in a similar but opposite manner. The triggering error levels of the amplifiers may be 1%, 3% and 5%. In an alternative error correction circuit, the pulse length of the pulsed portion of the correction signal may be varied continuously according to the gauge error. Anticipatory control may be used, where the input gauge is measured by transducer 14 to trigger amplifiers IGWA, IGHB, or IGLA, IGLB, if the input gauge is above or below the desired value respectively. These amplifiers, which trigger at preset input gauge error levels, change the state of a monostable circuit MSC for a predetermined time through triggering circuits FTC, STC, thus energizing relay MCR, whose contacts may activate indication or alarm means, other contacts e,g. MCRI changing the rate of correction applied from the output gauge correction circuit, for example amplifier SPHA may initiate long correction pulses and amplifier LPHA initiate continuous pulses. The reference input gauge error levels of the amplifiers in the anticipatory control circuit may be automatically changed if an input gauge error persists for a predetermined time. In the mill shown, the rolls 10, 11 and output reel 13 are electrically driven, the input reel 12 electrically braked and the roll gap hydraulically controlled.
Patent GB-1291457-A (GB)
Title: Improvements in or relating to artificial culture of shrimp
Inventor: MIYAMURA MITSUTAKE
IPC: A01K61/59
Filed: 1969-10-21
Abstract: 1291457 Shrimp culture MARIFARMS Inc 21 Oct 1969 51550/69 Heading A1A A method of cultivating shrimp comprises placing a controlled number of egg-carrying female shrimp in a controlled environment of sea-water of predetermined area and depth for spawning, controlling the aeration, removing adults and abnormal eggs after spawning, controlling the number of nauplii, growing phytoplankton in the environment, feeding the nauplii in the early larva stages on this plankton, and maintaining the temperature of at at least 25C during spawning and hatching and at at least 25C during the early larva stages. The hatching tanks 10, 20 can be charged and discharged with sea water passed through a filter box 22 by means of a siphon or water gate which may be provided with a suitable pump. The roof 21 of the hatchery is of semitransparent material equipped with blinds and light fixtures to regulate illumination during day and night. The numbers of eggs and nauplii are regulated throughout cultivation by random sample counting and appropriate filtering nets. The propagation of diatom plankton food culture is stimulated in enclosure 35 by introducing nutrient salts after which it is transferred to the nauplii tanks. A further food culture including benthic diatoms is prepared and used to feed the shrimp on about the third day of the zoea stage and supplemented by other foods such as nematoda, fish eggs, bivalve larvae &c. During the following mysis development, animal-type food is used such as artemia (brine shrimp). In the post-larva period only fish-meat and bivalves are fed. The young shrimp are then transferred to the culture pond which may depend on tidal flow to bring in water and plankton and remove waste as in 40 or may have an artificially controlled current of water. The water depth is at least 1m and the pond has a gently undulating floor of sand with hillocks 151 in which the shrimp may hide and aeration devices 242 provided.
Patent GB-1244482-A (GB)
Title: Lock or latch mounting means for doors of concrete
Inventor: HERBERT KENNETH
IPC: E05B9/08
Filed: 1967-11-15
Abstract: 1,244,482. Mounting locks. TONKS (BIRMINGHAM) Ltd. 31 Oct:, 1968 [15 Nov., 1967], No. 51920/67. Heading E2A. A latch and/or lock 10 is fixed into a recess 11 in the edge of a door, particularly a glass door 12, by means of a pair of plates 17, 18 clamping the door on either side and having outwardly turned flanges 30 for engagement in grooves 31 in cover-plates 32, and sliding movement of these plates being restrained between flanges 33 at the rear of the fixing plates 17, 18 and the forend plate 37. The lock shown has a barrel 13 secured by a screw at 16 and projecting through a hole 40 in one cover-plate, but it may be of plate tumbler type. The fixing plates 17, 18 are secured by four screws 21 entering threaded sockets 19 in plate 18, two of the screws passing through resilient bushes 22 lying in partcylindrical portions of the door-recess 11. These plates engage the lock body by inturned flanges 24 and tongues 25. The forend plate and the lock plate 15 are secured to flanges 26 on plate 18 by screws 36 and nuts 29. The flanges 33 have stop-plates 34 rivetted to them. A door handle 41 of channel shape is secured to cover-plate 18. (For Figure see next column)
Patent GB-1504909-A (GB)
Title: Louvte blades
IPC: B01D45/06
Filed: 1976-12-17
Abstract: 1504909 Louvre blades GREENWOOD AIRVAC VENTILATION Ltd 17 Dec 1976 [20 Dec 1975] 52261/75 Heading F4V A hollow louvre blade 1 has a first and second longitudinally extending opening 5 into the hollow interior of the blade respectively in the vicinity of the blades upper and lower edges. Rain which is wind-driven up the blade's surface passes through the upper opening into the blade, thence through the blade to a lower lip, along the lip, through an aperture 19 in a side member 11 and down the side member to a sump from which it discharges through a drainage pipe 23. Each blade is secured at each end to a flange of a respective angle member 12 provided at each side of the louvre. In a modification, each blade is secured to two flanges of two members 12 (and 30), Figs. 4 and 5 (not shown). Instead of apertures 19, the lower lip of each blade is cut away at one end (at 32) to allow water which has collected in the lip to escape and run down the side of one of the side members 11. Curved blade cross-sections are illustrated in Figs. 7 to 9 (not shown). In a further alternative, blades are supported by securing them to tags pushed out from the side members 11. The openings provided by pushing out the tags may serve as drain openings from the blade interiors.
Patent GB-1406265-A (GB)
Title: Container for granular or pulverulent material
IPC: A01F12/60
Filed: 1972-11-13
Abstract: 1406265 Grain tank MASCHINENFABRIK FAHR AG 13 Nov 1972 [11 Nov 1971] 52264/72 Heading A1F [Also in Division B8] A grain tank for a combine harvester is characterised by a cover 5 above and running the length of the auger 3 thus restricting the access to the auger to the two slots 8, 8'. The cover 5 is supported on two pairs of swinging arms 9 and its position within the arc of swing is controlled by a screw 10 passing through a pivoting abutment 11. Adjustment of the effective length of the screw 10 by means of a nut 13 and a locknut 14 causes the width of the feed slots 8, 8' to be varied. The slots 8, 8' may be tapered along the length of the cover by a non-uniform cross section. Also one leg of the cover 5 may be narrower than the other to compensate for unbalanced geometrical or feed conditions.
Patent GB-1094098-A (GB)
Title: Improvements in or relating to sifters
IPC: B07B4/02
Filed: 1964-12-23
Abstract: 1,094,098. Centrifugal separators; pneumatic separation. GEBR. PFEIFFER BARBAROSSAWERKE A.G. Dec. 23, 1964 [Jan. 2, 1964], No. 52379/64. Headings B2H and B2P. A sifting apparatus of the re-ciruclating air type for treating material containing fine substances and grit comprises a central cyclone 1 for separating the fine substances from the circulating air and surrounded by a collecting space 4 for relatively small and large grit and, arranged centrally above the cyclone, a fan 2 for producing the current of circulating air and a bladed type sifting wheel 5 for separation of the fine substances and relatively small grit carried by the circulating air, the fan 2 at its suction side lying coaxially of the cyclone and at its outlet being surrounded by a separating space 3 for the dust which communicates with the space above the cyclone 1 both upwardly, through baffles 6 and thence along a circuitous annular route A, and directly downwardly through a gap 14. The material to be treated is fed at 11 and is distributed circumferentially by way of a nozzle ring or annular gap 9 which has a rotating and/or vibrating supply ring for even distribution of the mateerial. Air sucked by the fan 2 passes upwardly through the feed material and carries with it the fines and the relatively fine grit, the relatively course grit falling down by gravity to a discharge port 13 via a stepped annular grid 10. The current of air, after separation of the relatively fine grit by the sifting wheel 5, conducts the fines to the cyclone 12 where the major portion of the fines are separated from the air. The air then passes through the fan 2 which imparts a whirling motion to it so that any remaining fines in the air is separated by centrifugal force into the space 3 and re-enters the space above the wheel 5 via the gap 14. The air then passes through the baffles 6 and through the grit in the collecting space 4 before being recirculated through the cyclone 1. The relatively fine grit separated by centrifugal force by the wheel 5 is thrown against the wall 15 and gravitates into the space 4 to be discharged together with the relatively coarse grit.