baber/WOPTO huggingface dataset:
Patent GB-1019548-A (GB)
Title: Improvements in and relating to amplifiers
IPC: H03K6/02
Filed: 1964-11-02
Abstract: 1,019,548. Transistor amplifier circuits. HUGHES AIRCRAFT CO. Nov. 2, 1964 [Nov. 18, 1963], No. 44556/64. Heading H3T. An amplifier comprising a number of transistors connected in series has a diode to protect an emitter base junction and a stabilized biasing circuit, the arrangement being such that the emitter-collector voltages of the transistors are equal. The circuit shown comprises a preamplifier 22, 24, 26 provided with negative feedback via a resistor 28 and having its output applied to the base of the first transistor 32 of a series chain 32, 34, 36. The latter two transistors are so biased through resistors 60, 64 from stabilized voltage sources provided by Zener diodes 52 and 50 that the voltage drop across the three transistors is equal. Protective diodes 76 and 78 are provided for the collector electrodes of transistors 34 and 32 since, when the signal is such as to interrupt suddenly the current flow, cut-off of the transistors does not occur simultaneously, transistor 32 being the quickest because the low base circuit impedance allows stored carries to quickly disperse. Further diodes 84, 86 prevent excessive reverse bias of the emitter-base junctions. The circuit is used to provide a sawtooth deflection voltage for a cathode ray tube and accordingly it is arranged in push-pull form by providing a similar output chain 38, 40, 42 fed by the preamplifier at the first-emitter so that the current in the two chains varies in antiphase, the normal condition being set by a potentibmeter 74 such that transistor 32 is non- conducting and 38 conducting. Common emitter coupling between transistors 32 and 38 may be provided instead of the driving arrangement shown. Negative feedback is provided from output load 44 to the input circuit. The series chains may comprise two, or more than three, transistors.
Patent GB-1100026-A (GB)
Title: Improvements in and relating to a tea-stalk extractor machine
Inventor: RIDLER WILLIAM FREDERICK ALLAN
IPC: A23F3/00
Filed: 1963-11-15
Abstract: 1,100,026. Screening machine. MARSHALL'S TEA MACHINERY CO. Ltd. 16 Nov.. 1964 [15 Nov., 1963], No. 45139/63. Heading B2H. A tea grader and stalk extractor comprises a reciprocatory screen 10, Fig. 3, formed with an array of raised apertured portions 11 over its surface, a majority of the portions each having a plurality of holes 12, 13 formed therein. Preferably all the raised portions have a plurality of holes. The holes are nearer the centre than the periphery of the portions. In the machine shown in Fig. 1, screens 10a, 10b are mounted in oppositely inclined trays 2, 3 which are supported on a frame 1 by means of flexible legs 4, 5 and are reciprocated by means of arms 6, 7 coupled to a crankshaft (not shown) mounted in bearings in an extension 8 of the frame and keyed to pulleys 9 driven through belting by a prime mover. Tea leaves are fed on to the screen 10a from a hopper 14 and the trays are vibrated to shake the leaves first across the surface of the screen 10a and then, in the opposite direction, across that of the screen 10b, an opening (not shown) in the base of the screen 10a adjacent its lower end allowing the leaves to fall on the upper end of the screen 10b. Leaves and mainly stalks from the lower end of screen 10b are collected in a receptacle (not shown). Small sized leaves passes through the holes 12, 13 of the screens 10a, 10b and drop on the bottom parts of the trays 2, 3 and are discharged through chutes 15, 16. The holes in screen 10a may have a different size different from that of the holes in the screen10b.
Patent GB-1209100-A (GB)
Title: Improvements relating to high-voltage direct-current systems
IPC: H02H7/26
Filed: 1968-09-24
Abstract: 1,209,100. H.V.D.C. converting systems. BROWN, BOVERI & CO. Ltd. 24 Sept., 1968 [26 Sept., 1967], No. 45333/68. Heading H2F. In a H.V.D.C. converter station forming one of a number of parallel connected stations connected between an A.C. network and a multipoint D.C. transmission system, should a short circuit condition occur due to back-flashing of a mercury arc rectifier therein, the station rectifiers are temporarily isolated or by-passed for a short duration by a controlled rectifier 20, 21 or alternatively a fast acting mechanical switch. Assuming a back-flash in a rectifier of a bridge 4 of station 2, then a transformer 8 is temporarily short circuited and there will be a rise in current on the D.C. side of the station which is detected by a current transformer 18 the output of which feeds a control equipment unit 22. The unit 22 acts to trigger a by-pass valve (not shown) connected across the faulty bridge to bypass direct current from bridge 5 and in addition the unit 22 biases the bridge 4 rectifiers to non- conducting condition. Energy stored in a smoothing choke 16 discharges, resulting in the station output current being reduced to zero. This would normally result in the choke ceasing to isolate the undisturbed bridge 5 from the D.C. voltage mains 1 which would act with the transformer voltage to produce over-voltage across bridge 5, and possibly back-flash. This is avoided by the triggering to conduction by unit 22 of the rectifier 20 in the short circuiting or by-pass path between a tap of the choke and earth, which maintains current flow through the choke so that it can absorb the difference between the presumed constant D.C. mains voltage and the station 2 voltage. Thus the choke remains effective to prevent mains voltage being applied directly across rectifier bridge 5 through which the current is rapidly reduced by the control action of unit 22. As soon as the short-circuiting condition has passed, the unit 22 automatically restores station 2 to its normal working condition.
Patent GB-1428790-A (GB)
Title: Production of cane sugar
IPC: C13B20/00
Filed: 1973-09-28
Abstract: 1428790 Removing solids from sugar liquors by flocculation and flotation TATE & LYLE Ltd 10 Sept 1974 [28 Sept 1973] 45516/73 Heading C6B  Suspended solid impurities are removed from a sugar liquor, which is cane sugar evaporated juice or affination syrup, by a process comprising adding a water-soluble phosphate salt (e.g. a sodium orthophosphate) to the sugar liquor, to form a water-insoluble calcium phosphate primary floc containing suspended impurities; aerating the liquor containing the primary floc, with agitation; distributing uniformly throughout the aerated liquor from 1 to 40 parts by weight of anionic flocculating agent per million parts by weight of sugar in the liquor, to initiate the formation of a secondary floc therin, the flocculating agent being a polymer with a molecular weight of from 1 to 10 million containing from 50 to 80 mole per cent of acrylamide units and from 50 to 20 mole per cent of acrylic acid and/or acrylate units; retaining. the resulting mixture for from 15 seconds to 5 minutes in a flocculator vessel, with non-turbulent agitation preventing the segregation of the secondary floc from the liquor and allowing the secondary floc to grow; transferring the liquor containing the secondary floc without further agitation from the flocculator vessel to a separator vessel; allowing the secondary floc to segregate by flotation from the liquor in the separator vessel; and separately removing clarified liquor and flocculated solids from the separator vessel. Preferably the phosphate salt is added in an amount corresponding to from 100 to 600 parts by weight of P 2 O 5  per million parts by weight of sugar in said liquor and from 1 to 20 parts by weight of flocculating agent are used per million parts by weight of sugar in the liquor.
Patent GB-1129702-A (GB)
Title: Equilibration and steam-reforming catalysts
IPC: B01J23/86
Filed: 1966-10-13
Abstract: 1,129,702. Reforming, shift and methanation catalysts. ESSO RESEARCH & ENG. CO. 13 Oct., 1966 [23 Dec., 1965], No. 45742/66. Heading B1E. Catalysts useful in reforming, methanating and effecting the shift reaction comprise an interspersed calcined mixture of 18-35 parts NiO, 12-61 parts Al 2 O 3 , 5-15 parts ZnO or CuO and 5-15 parts Cr 2 O 3  impregnated with a basic metal oxide promoter selected from 1-15 parts of BaO or 5-25 parts of an oxide of K, Cs, Sr, La, Ce, Fe, Co, Mo or W, the NiO being reduced to Ni in major amount when the catalyst is activated. Examples give details of composition of a variety of catalysts.
Patent GB-1367162-A (GB)
Title: A i avtopriborov method for manufacturing electromagnetic cores
IPC: H01F41/02
Filed: 1971-10-02
Abstract: 1367162 Making electromagnetic cores; forging NAUCHNO-ISSLEDOVATELSKY I EXPERIMENTALNY INSTITUT AUTOMOBILNOGO ELEKTROOBORUDOVANIA I AVTOPRIBOROV 20 Oct 1971 45962/71 Headings B3A and B3H [Also in Division H1] A method of making electromagnetic cores, e.g. transformers, choke coils, induction coils and the like, comprises forming slots 2 in a substantially planar sheet metal blank 1, the slots being parallel to an edge of the blank, and crushing the blank by applying force to the blank perpendicular to the slots, the force bending the blank along the lines of the slots and at places between the slots and pressing the crushed blank to form a core. The slots 2 are cut parallel to the direction of the grain of the blank 1 and in making U-shaped or E- shaped cores, the blanks are bent to the required shape. The shaped blanks are placed in a die 3 and crushed and pressed by a punch 4. The blanks may be flat when placed in the die, when cylindrical cores are required, Fig. 2 (not shown), and if necessary they may be heated prior to pressing or crushing.
Patent GB-1363338-A (GB)
Title: Method of and apparatus for control of helicopter gas turbine engine during autorotation
IPC: F02C9/58
Filed: 1972-10-05
Abstract: 1363338 Helicopter gas turbine engine BENDIX CORP 5 Oct 1972 [28 Oct 1971] 46013/72 Heading F1G The invention relates to a method of controlling a helicopter gas turbine engine in which engine power failure may be simulated for the purpose of helicopter practice auto-rotation. The engine comprises a gas generator section including a compressor-drive turbine 28, also a power turbine 32. Fuel supply is controlled by a metering device 34 which is regulated in response to compressor discharge pressure P c  communicated through line 38, leak-off passages 40, 42 being controlled by pivotally mounted levers 68, 70 of a gas generator turbine governor 44 which receives a manual signal from lever 62. A power turbine governor 48 receives a manual signal from lever 64 and controls the position of a pivotally mounted lever 88 which controls discharge of air from line 50. The governor 44 comprises centrifugal weights 66 and the lever 68 is loaded by a spring 72 the loading of which is controlled by the lever 62. The position of the lever 68 is also controlled by a diaphragm 80 which is connected to the lever by a rod 78. The diaphragm 80 is subject at its left-hand side to pressure P R  which is communicated thereto through line 58 and restriction 82; the diaphragm is subject at its right-hand side to pressure P E  which is communicated thereto through lines 58, 84 and restriction 86. The chambers at the two sides of the diaphragm may communicate through a passage 90 which is normally closed by a valve member 92 urged to the closed position by a spring 100. For the purpose of simulating engine failure, the control lever 62 is moved to the 'idle' position, the lever acting through linkage 106 and pivoted lever 104 to open the valve 92 whereby the pressures at the two sides of the diaphragm 80 are equalized so that the diaphragm has no control effect on the governor 44. So speed control of the gas generator turbine 28 is derived from the gas generator governor 44 in response to the position of the control lever 62 and the centrifugal weights 66.
Patent GB-1530716-A (GB)
Title: Locks and catches for vehicles
IPC: E05B65/12
Filed: 1976-11-08
Abstract: 1530716 Vehicle locks FICHTEL & SACHS AG 8 Nov 1976 [8 Nov 1975 10 Nov 1975 22 Dec 1975] 46353/76 Heading E2A A shuttering and/or locking device for vehicle doors includes a flywheel 4 which, before delivering its energy for closing or locking via transmission gear 6, 7, 8, has been brought up to a predetermined speed of rotation by an electric motor 2. This build-up of speed of flywheel rotation is made possible by e.g. idle-travel 22 between e.g. rack 9 and pull rod 12 which is connected to locking lever 18. This device is particularly suitable for connecting to existing shutting and/or locking mechanisms in conjunction with appropriate electronic control.
Patent GB-1255248-A (GB)
Title: A serial-entry, serial access memory device
Inventor: MURRAY WILLIAM DENNIS
IPC: G11C8/00
Filed: 1969-09-22
Abstract: 1,255,248. Magnetic storage arrangements. BURROUGHS CORP. 22 Sept., 1969, No. 46500/69. Heading H3B. Binary information is written serially and read out non-destructively in a magnetic thin film store by propagating a domain wall along a tensioned rod of 79 or 82 Permalloy or 14 Ni-Fe adjacent the store. The store may comprise either a plurality of magnetic thin-film wafers 74-78, Fig. 7, each supported by a glass substrate and spaced longitudinally along the rod, or a longitudinally-extending strip 104, Fig. 10, of magnetic thin film. Initially the rod is magnetized in the same direction throughout as shown at 14 in Fig. 1, but when domain reversal is effected by pulsing a starting coil 12, a domain wall 20 is propagated along the rod by a bias magnetic field 16. Since a cross field exists at the domain wall, this field causes non-destructive read-out at each wafer 74-78 or at each discrete storage location in the magnetic thin film strip 104, in turn, as it passes along the rod. Successive output pulses induced in the rod by the disturbed storage flux comprise the read-out signals in Fig. 7, while in Fig. 10 read-out signals are induced in a separate sense line 106. For writing, a current pulse of appropriate direction is applied through the rod each time the travelling domain wall reaches a storage location. The Fig. 7 arrangement may include a flux path closure shield as shown in Fig. 9. After reading or writing, the magnetic state of the tensioned rod is reset by reversing and increasing the bias field 16 or by energizing a reset coil. It is possible to reverse the direction of the propagated domain wall by reversing the bias field at a suitable time. Such reversal may be utilized for reading out stored data in reverse order. By varying the bias field the rate of data reading may be controlled. The embodiments may use 82 Permalloy which is characterized by the properties of one easy and two hard directions of magnetization; these properties are utilized in particular in the arrangement shown in Fig. 10.
Patent GB-1520510-A (GB)
Title: Internal combustion engine
IPC: F02M31/14
Filed: 1975-11-11
Abstract: 1520510 IC engine pre-combustion chambers; heating mixture TOYOTA JIDOSHA KOGYO KK 11 Nov 1975 [13 Nov 1974] 46623/75 Heading F1B An I.C. engine comprises a main combustion chamber 20 in cylinder head 21, an inlet passage 23 for conducting a first air/fuel mixture to a main inlet port 24 which is controlled by an inlet valve 22, an auxiliary combustion chamber 25 having a spark-plug 29, an auxiliary inlet opening 26 directed towards main inlet port 24 and an auxiliary passage 30 extending through the head 21 for supplying a second, richer air/fuel mixture and having an outlet end positioned adjacent main inlet port 21, whereby in operation of the engine, during induction of air/fuel mixture through the main inlet port a stream of rich air/fuel mixture flows into the auxiliary chamber while a lean air/ fuel mixture flows into main chamber 20. Auxiliary passage 30 comprises a first portion which extends through the cylinder head and a second portion formed by a tube 31 which either has a threaded end 32 which screws into the cylinder head or is press-fitted into the cylinder head up to a shoulder 33. Reference is made to Specification 1520504 (Ser. No. 46611/75) and to Specification No. 1454483.
Patent GB-953023-A (GB)
Title: A sintered electrode
IPC: H01J61/073
Filed: 1961-12-29
Abstract: 953,023. Electrode materials and constructions. PATENT - TREUHAND - GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN. Dec. 29, 1961 [Jan. 2, 1961], No. 46629/61. Heading H1D. A sintered electrode, e.g. for use in gas and/ or vapour discharge lamps, the sintered body of which contains at least one of the oxides of barium, calcium and thorium and at least one metal with a high melting-point such as tungsten or molybdenum, is formed such that the sintered body is pressed round an electrode pin of a metal with a high melting-point such as tungsten or molybdenum, and its surface comprises zones with different rates of vaporization and different work functions of electrons. In the various forms shown, the zone with a lower work function 5 is provided on the part of the electrode remote from the discharge space, Fig. 2, the zone of higher work function 6 may surround the zone of lower work function 5, Fig. 3 (not shown), and the two zones may have a distinct boundary, or merge one into the other, Fig. 4 (not shown). Specific compositions of the zones preferably comprise a mixture of 5BaO.2Al 2 O 3  with between 70-98% by weight, preferably 90%, of tungsten powder, the aluminium content amounting to 0.05-1%, preferably 0.1%, by weight. Alternatively, both zones may contain a mixture of 40-70% of thorium oxide, 10- 40% of barium carbonate, 5-20% of calcium carbonate and 0.5-5.0% of silicon dioxide, to which is added 60-90% preferably 80% of tungsten powder for the zone of higher work function, and up to 60%, preferably 30-40% of tungsten powder for the zone of lower work function. In manufacturing the sintered body, the mixtures are compressed to a pressure of 1000-5000 kg./cm.<SP>2</SP>, preferably 3000 kg./cm.<SP>2</SP> and sintered at between 2100-2300 C. Preferably, the ratio of diameter to length of the sintered body lies between 1: 1 and 1: 3, and the ratio of the diameter of the electrode core pin to that of the sintered body lies between 1: 2 to 1: 5.
Patent GB-1038208-A (GB)
Title: Improvements in and relating to the skin-packaging of articles
IPC: B65B11/52
Filed: 1964-11-17
Abstract: 1,038,208. Non-curling package. STANLEY WORKS. Nov. 17, 1964 [Nov. 19, 1963], No. 46727/64. Heading B8C. Before an article 4a (Fig. 4, not shown) is skin packaged to a base sheet 2a, the lower surface of the base sheet is moistened and during a skin-packaging sufficient moisture is removed from this lower surface to eliminate curling of the package under humid conditions. In the embodiment described the base sheet 2a which may be porous paperboard is moistened by passing between two rollers, one of which dips in an aqueous agent. The aqueous agent may be water, waterglass or a Werner-type chromium complex in isopropanol, admixed with hexamethylenetetramine and water. The article is placed on the dry surface of the sheet 2a and a length of synthetic thermoplastic film is supported above the sheet and article. The film is then heated and suction is drawn through the base sheet 2a to skin-package the article. The skin-package may then be passed through a drying oven, or the lower surface of the sheet 2a subjected to heat lamps to ensure that sufficient moisture has been removed from the sheet. The thermoplastic film 6a, may be bonded to the sheet 2a with or without adhesive. Several articles may be skin-packaged on the same sheet which is subsequently cut up. The base sheet may have printing on it and perforations may be incorporated for hanging or for opening the package. In the case of large articles perforations may be provided in the base sheet near the article to assist in the drawing of the film about the article.
Patent GB-1059102-A (GB)
Title: Vehicle lamps
Inventor: WELLS SYDNEY PENNINGTON
IPC: F21V19/00
Filed: 1962-12-12
Abstract: 1,059,102. Lampholders. JOSEPH LUCAS (INDUSTRIES) Ltd. Nov. 26, 1963 [Dec. 12; 1962], No. 46877/62. Heading H2E. [Also in Division F4] A vehicle lamp comprises a body of moulded synthetic resin provided with means for securing it to a vehicle, the body having an integral bulb supporting socket and at least one resilient arm being pivoted to the body and movable from an inoperative position to one in which it holds the bulb in position and provides an electrical connection thereto. In the form shown, the lamp comprises a cylindrical outer casing 6 having an integral reflector 7, closed in front by a lens 13 and provided with sockets 8, 9 to receive bulbs 18,25. The bulb 18 has a flange 17 engaging a rim 16 in the socket 8 with the interposition of an annular metal conductor 21 having an extension 22 formed with a screw-thread to receive the bulb 25 in the socket 9 and a further extension 24 forming an earth terminal. The bulb 18 is held in place by a pair of pivoted, spring tongues which are also connected to the leads and contact terminals on the base of the bulb connected to main and dipped filaments. The body 6 is formed with spigots for securing it to brackets on the vehicle.
Patent GB-956753-A (GB)
Title: Improvements relating to elastomeric products
IPC: C08K3/22
Filed: 1962-12-18
Abstract: An elastomeric article is reinforced with synthetic polyester or polyamide cord or yarn, wherein the skim stock contiguous to the cord or yarn contains 3-25% by weight of calcium or strontium oxide or activated aluminium oxide.  The skim stock is defined as that within 60 mils of the yarns or cords.  Specified articles are tyres, conveyer belts, drive belts and hoses. The oxides of the invention are preferably admixed with the skim stock as a 3:1 dispersion (or in the case of aluminium oxide a 5:3 dispersion) in an aromatic plasticizing oil.ALSO:An elastomeric article is reinforced with synthetic polyester or polyamide cord or yarn, wherein the skim stock contiguous to the cord or yarn contains 3-25% by wt. of calcium or strontium oxide or activated aluminium oxide.  The skim stock is defined as that within 60 mils of the yarns or cords.  Specified articles are tyres, conveyer belts, drive belts and hoses.  The oxides of the invention are preferably admixed with the skim stock as a dispersion in an aromatic plasticizing oil.
Patent GB-1415003-A (GB)
Title: Voltage generating arrangements
IPC: F23Q3/00
Filed: 1972-10-18
Abstract: 1415003 Piezoelectric generators MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 18 Oct 1972 47888/72 Heading H2A In a piezo-electric generator in which a hammer 38 is moved away from a piezoelastic element 32 against the action of a spring 39 and then released, the hammer actuating mechanism comprises a rotatable ring 40 having an internal saw-tooth shaped surface 41, 42 which engages a pin 36 projecting from the hammer through guide slots 37, the pin comprising a metal core coated with plastics material.
Patent GB-1092116-A (GB)
Title: A method of block recording data on a magnetic tape
IPC: G11B20/12
Filed: 1964-11-27
Abstract: 1,092,116. Data storage arrangements. NIPPON TELEGRAPH & TELEPHONE PUBLIC CORPORATION and IWASAKI TSUSHINKI KABUSHIKI KAISHA. Nov. 27, 1964 [Dec. 2, 1963], No, 48287/64. Heading G4C. In a method of and arrangement for recording blocks of data on a magnetic tape, the data is supplied at a frequency f<SP>1</SP> 1  to a buffer core store 3, with a switch Sw open until a predetermined number of bits is stored in the store 3. The switch Sw is then closed and data is recorded on the tape by a head 4 at a frequency f<SP>1</SP> 2  greater than f<SP>1</SP> 1 . During the recording the supply of data to the buffer store 3 is continued, recording being terminated when the buffer store 3 becomes empty. The recorded block length and inter-block space thus depend on the difference in value between f<SP>1</SP> 1  and f<SP>1</SP> 2 .