baber/WOPTO huggingface dataset:
Patent GB-1276373-A (GB)
Title: Solid state oscillator
IPC: H03B9/14
Filed: 1969-10-17
Abstract: 1276373 Semi-conductor oscillators HITACHI Ltd 17 Oct 1969 [18 Oct 1968] 51240/69 Heading H3T [Also in Division H1] A solid state oscillator has a cavity resonator 1 with a conductive plate 3 isolated in a plane perpendicular to the direction of an equiphase plane of an electric field in the resonator at a position bisecting the resonator, at least two solid state oscillating elements 4 are disposed respectively on opposite surfaces of the conductive plate 3 through which a bias voltage is provided and the positional deviation between the elements 4 disposed in the equiphase plane' of the electric field is at the most <SP>1</SP>/ 8 #g (where #g is the resonator wavelength). The elements 4 may be Gunn diodes, IMPATT avalanche diodes or limited space chargeaccumulation(LSA) diodes. The conductive plate 3 is D.C. isolated from the wall of the resonator 1, is fed with D.C. bias from a RF choke 6 and is tapered at its ends (Fig. 3a) for matching. The resonator 1 is shown as part of a rectangular waveguide and has a movable short circuit 2 and adjusting stubs 7 for adjusting the impedance of each element and the frequency. Variable reactance circuits 10 and short plungers 11 may be included to enable the RF voltage acting across each element 14 to be varied independently. A resistive element 12 may be connected in series with each oscillating element 4 so as to protect them from over current. Also if one of the oscillating elements 4 becomes damaged to act as a short circuit the associated resistive element 12 allows bias still to be applied to the remaining oscillating elements so that these still produce oscillations. The resistors 12 may be variable in the form of a temperature dependent resistor whose resistance increases with increasing temperature to stabilize the oscillator by providing constant current. The resistor 12 may be embedded in the conductive plate 3. The oscillator output is taken from a coupling window 8 and the waveguide may be circular or elliptical.
Patent GB-1389429-A (GB)
Title: Gypsum boards
IPC: C04B28/14
Filed: 1972-11-07
Abstract: 1389429 Plaster compositions BPB INDUSTRIES Ltd 1 Aug 1973 [7 Nov 1972] 51368/72 Heading C1H An accelerator for use in making gypsum board comprises gypsum and a C 12  (or more) fatty acid or its salt; e.g. stearic, palmitic, oleic and linileic acids or their A.M. or A.E.M. salts. The accelerator has a specific area of at least 800 m.<SP>2</SP>/kg.
Patent GB-1078260-A (GB)
Title: Reciprocatory spark ignition internal combustion engines
IPC: F02B17/00
Filed: 1965-12-06
Abstract: 1,078,260. Combustion chambers. FORD MOTOR CO. Ltd. Dec. 6, 1965 [Dec. 10, 1964], No. 51607/65. Heading F1B. In a spark ignition I. C. engine wherein air is inducted into a cylinder so that it swirls in parallel streamline layers, fuel is introduced into only some of these layers swirling near the spark plug, and the ignition timing is varied in dependence upon the engine load so that the amount of mixing between fuel impregnated and unimpregnated layers before ignition is such that at ignition, a correct mixture strength is obtained in the region of the spark plug. However, under all conditions, ignition occurs before complete mixing of the fuel and air so that regions remote from the spark plug contain substantially fresh air which prevents detonation. In Fig. 1, the air swirls about an axis perpendicular to the cylinder axis and an injector 30 directs fuel on to part of the inlet port swept by air layers swirling near spark plug 38, which layers are thus impregnated with fuel. The ignition is advanced progressively for progressively lighter engine loads. Instead of being directed on to the inlet port, fuel may be directed on to part of the inlet valve head, Fig. 2 (not shown). The inlet passage may be divided into two passages by a longitudinal partition, Fig.3 (not shown), fuel being introduced into only one of these passages by an injector or a rich mixture carburetter. In Fig.4 (not shown), separate passages for air and mixture are provided and are controlled by separate inlet valves actuated by the same rocker arm. The mixture passage may be slightly throttled. In Fig. 5, the air swirls about the cylinder axis. Separate air and mixture passages 82, 86 are provided, and the air and mixture valves 80 and 87 are opened respectively during the initial and latter parts of the induction stroke. The mixture valve seat is separated from the cylinder by a cylindrical recess within which the head of valve 87 moves with small clearance thus permitting this valve to move before the port opening is scheduled. In another modification, Fig. 6 (not shown), an injector disposed in the cylinder wall directs fuel on to the cylinder head. A single air inlet is divided into two passages by a partition and one of the passages may be throttled to vary the air charge swirl rate. In Figs. 7 and 9 (not shown), an injector located in the cylinder head impregnates the air layer adjacent the head with fuel, and in Fig. 8 (not shown), an injector disposed in the cylinder wall near the bottom dead centre position of the piston directs fuel on to the dished piston crown.
Patent GB-1098236-A (GB)
Title: Improvements in the catalytic hydrogenation of aromatic compounds containing reducible groups
Inventor: RICHARDS JEFFREY
IPC: C07C209/36
Filed: 1965-12-07
Abstract: The catalytic hydrogenation of aromatic hydrocarbons containing olefinic or acetylenic groups is effected in the presence of sulphur dioxide, whereby the tendency of the aromatic nucleus to undergo hydrogenation is reduced. The sulphur dioxide may be added as a gas or in solution.  The catalyst may be a known hydrogenation catalyst, a number of which are specified, and may be supported on a carrier. An example is given of the production of ethylbenzene from styrene.ALSO:The catalytic hydrogenation of aromatic compounds containing one or more reducible groups is effected in the presence of sulphur dioxide, whereby the tendency of the aromatic nucleus to undergo hydrogenation is reduced. Specified reducible groups are nitro, nitroso and azo groups, which yield amino groups, alkenylimino and cyclo-alkenylimino groups, which yield alkylamino and cycloalkylamino groups, carbonyl groups, which yield carbinol groups, and olefinic and acetylenic groups, which yield the corresponding saturated compounds (see Division C5). The reducible group may be present initially in the compound to be reduced or it may be formed in situ, as in the reductive alkylation of primary aromatic amines in the presence of ketones. The sulphur dioxide may be added as a gas or in solution.  The catalyst may be a known hydrogenation catalyst, some of which are specified, and may be supported on a carrier. Examples are given in which (1) p-aminodiphenylamine and acetone yield p-isopropylaminodiphenylamine, (2) p - aminodiphenylamine and cyclohexanone yield N-cyclohexyl - N1 - phenyl - p - phenylene diamine and (3) nitrobenzene yields aniline, sulphur dioxide and a hydrogenation catalyst being present in each case.
Patent GB-1293988-A (GB)
Title: Printing mixtures capable of developing color
IPC: B41M5/10
Filed: 1970-11-02
Abstract: 1293988 Printing inks XEROX CORP 2 Nov 1970 [3 Nov 1969] 51972/70 Heading C4A [Also in Division D2] A printing mixture capable of undergoing colour change comprises a decolorizable coloured dye capable of decolorizing in alkaline medium admixed with a colourless stable azo dye intermediate in an acidic medium, the intermediate being capable of forming a coloured azo dye by reaction with a coupling agent in an alkaline medium. A colour developer for use therewith thus comprises an alkaline solution of an azo coupling reagent. Numerous decolorizable dyes, azo dye intermediates and coupling agents are disclosed. The printing mixture is preferably maintained at a pH of 3À5-6À5 with dilute mineral acid, and the developer at 7À5-14 using caustic soda, soda ash or ammonia. The mixture can be used as an ink for pens or brushes, to impregnate or coat typewriter ribbons, or in the formation of carbon paper, either by admixture with conventional coating materials therefor or by forming ink microcapsules. The colour developer may be applied to a formed image by swabbing, spraying or immersion, or the paper employed may be impregnated therewith. Example 1 discloses a dark blue ink comprising aniline blue, tetrazotized 4,4<SP>1</SP>-diamino-2,2<SP>1</SP>,5,5<SP>1</SP>- tetramethyltriphenylmethane, and aqueous HCl for impregnating a typewriter ribbon. The developer therefor is 2-naphthol-3,6-disulphonic acid in NaOH, which generates the red dye Brilliant Carmine L. In Example 2 a transfer sheet is formed by coating with the same ink admixed with a casein solution.
Patent GB-1163777-A (GB)
Title: Production of 4-Formylmethylene-Oxazolidinones-(2)
Inventor: SEEFELDER MATTHIAS
IPC: C07D263/38
Filed: 1966-11-24
Abstract: 1,163,777. Formylmethylene-oxazolidinones. BADISCHE ANILIN- & SODA-FABRIK A.G. 24 Nov., 1966 [25 Nov., 1965], No. 52635/66. Heading C2C. [Also in Division C4] Compounds of the formula wherein R, R<SP>1</SP> and R<SP>2</SP> each denotes an aliphatic, cycloaliphatic, araliphatic or aromatic radical with up to twelve carbon atoms, R<SP>1</SP> and R<SP>2</SP> may also denote joint members of a 5- to 12- membered cycloaliphatic ring and R 1  may also be H and preparation thereof by reacting a compound of the formula wherein R, B<SP>1</SP> and R<SP>2</SP> have the above significance with a compound of the formula wherein R<SP>3</SP> and R<SP>4</SP> each denotes C 1 -C 4  alkyl radical or a C 6 -C 10  aryl radical or R<SP>3</SP> and R<SP>4</SP> together with the nitrogen atom which they substitute and, if desired, with another hetero atom may form a heterocyclic ring having preferably 5 or 6 members at a temperature of 0 to 120 C. in an inert solvent such as a hydrocarbon, chlorohydrocarbon or ether with boiling point between 40 and 200 C. and subsequently hydrolysing the product in a conventional manner by treating it with specified alkaline agents. The formamido chlorides of the third general formula above are prepared by treating an appropriate N-formylamino compound with a specified inorganic acid chloride, in particular, those derived from dimethylformamide, N- formylpiperidine and N-methylformanilide are used in the examples. The preparation of 3- phenyl-, 3-cyclohexyl- and 3-n-butyl-substituted 5 ,5-dimethyl - 4-formylmethylene-oxazol - idin-2-one; 3-cyclohexyl- and 3-n-butyl-substituted 5,5 - pentamethylene - 4 - formylmethylene - oxazolidin - 2 - one; and 3 - benzyl and 3-(3<SP>1</SP>-methoxypropyl)-substituted 5- methyl - 5-ethyl - -4-formylmethylene - oxazolidin- 2-one is described.
Patent GB-1164290-A (GB)
Title: Improvements in or relating to Gear Pumps and Motors.
Inventor: HEINE HEINZ
IPC: F04C15/00
Filed: 1966-11-24
Abstract: 1,164,290. Rotary positive-displacement pumps and motors. INDUSTRIEWERKE KARLMARX-STADT VEB. Nov.24, 1966, No.52739/66. Heading F1F. A reversible rotary positive-displacement pump, or motor, of the externally-meshing geartype includes a pair of gears 2, 3, Fig. 1 attached to rotatable shafts 4, 5 mounted in axiallymovable bearing-bushes 6--9 that are pressed against the ends of the gears by pressure communicated to chambers 20, 21 containing seals 40, 41 from the high-pressure side of the gears through a channel 14, or 15, Fig.3, a bore 31, or 32, in one of a pair of fixed bushes 29, 30 that form a housing for a valve member 33, and a channel 19 having branches extending to said chambers. Leakage fluid escapes to the lowpressure side of the gears through bores 27, 28 in the shafts, non-return valves 24, 25, channels (22, 23, Fig. 2, not shown), a duct (16) containing the bushes 29, 30, and the channel 14, or 15. The valve member 33 closes either the bore 31 or the bore 32 according to the pressure difference between inlet and outlet chambers 12, 13 for the working fluid, which chambers are separated from each other by the intermeshing gear teeth.
Patent GB-1196300-A (GB)
Title: Freeze-Drying Apparatus
IPC: F26B5/06
Filed: 1967-12-01
Abstract: 1,196,300. Freeze - drying apparatus. NESTLE'S PRODUCTS Ltd. 1 Dec., 1969 [23 Dec., 1966], No. 52921/69. Divided out of 1,196,299. Heading F4G. A freeze-drying apparatus comprises an elongated vacuum chamber comprising a fixed hood 20 connected to a vibrating elongated ribbed tray 23 by flexible seals 29, the tray being mounted on supports 24 supported on springs 25 and vibrated by a pneumatically or electromagnetically operated vibrator 27. The apparatus comprises heating pipes 30, gas or oil burners or electric heaters. The chamber has a vapour outlet connected to condenser(s) 21. The chamber comprises a filter 35 for removing fine particles from the sublimed vapours. The filter 35 comprising one or more parts, is connected to perforated chassis 36 supported by vibrator 37. The filter is connected to tray 23 by flexible seals 38. In use, material is fed into one end of the chamber through an airlock and discharged at the other end through an airlock.
Patent GB-1408282-A (GB)
Title: Thermosetting moulding compositions
IPC: C08L67/06
Filed: 1972-11-17
Abstract: 1408282 Unsaturated polyester compositions HOECHST AG 17 Nov 1972 [18 Nov 1971 5 Aug 1972] 53299/72 Heading C3P A thermosetting moulding composition comprises (A) an unsaturated polyester, (B) a copolymerizable monomer, (C) a filler or reinforcing substance, (D) a catalyst, (E) a mouldrelease agent and (F) a compound of the formula wherein R 1  is alkylene having 1 to 8 carbon atoms, arylene having 6 to 12 carbon atoms, diarylene-alkane having 13 to 15 carbon atoms, diarylene-sulphone having 12 carbon atoms or cycloalkylene having 5 to 8 carbon atoms, R 2  to R 5 , which may be the same or different, and each represents a hydroxyl-terminated poly- (oxyalkylene) group derived from one or more alkylene oxides, styrene oxide and cyclohexylene oxide. In the examples the compositions comprise polyesters prepared from maleic anhydride, ethylene glycol, propene-1,2-diol, dimethylpropane-1,3-diol, isophthalic acid and phthalic acid, styrene, tetra-(polyoxyethklene-/ oxypropylene) ethylenediamine, calcium stearate, t-butyl perbenzoate, ground limestone, glass fibres finished with a vinyl silane size, diamyl peroxide, ground kaolin, dropped silanized glass fibres, magnesium oxide and tetra-(polyoxypropylene) ethylenediamine.
Patent GB-1423980-A (GB)
Title: Separately excited speed controlled dc motors
IPC: H02P7/282
Filed: 1971-11-18
Abstract: 1423980 Automatic speed control SEVCON Ltd 19 Feb 1973 [18 Nov 1971] 53720/71 Heading G3R [Also in Division H2] The speed of a separately excited D.C. motor particularly for traction; and having a field winding 11, is controlled by a static switching circuit varying the mean current through the field. In Fig. 1, the field current is fed via a rectifier 13 and choke 12, and the mean field current and hence the speed is controlled by intermittently shunting the field 11 by means of a thyristor 14. A thyristor 16, a capacitor 15, a diode 17, and an inductor 18 provide a commutation circuit for thyristor 14. The two thyristors are triggered by respective pulses from a pulse generator 19, the mark space ratio of 14 which determines the field current, and which may be controlled by an accelerator pedal. The armature 22 have a regulating means comprising an inductor 20 and rectifier bridge 21 permitting connection to a supply voltage greater than rated voltage, and maintaining a substantially constant armature current. In another embodiment Fig. 2 (not shown) the field is supplied from A.C. through an impedance and is shunted by two alternately-conducting thyristors (33, 34) controlled by a pulse generator (35). When one thyristor is conducting the other is always non-conducting and each can be made to conduct for part of a half-cycle by increasing the firing angle of the triggering pulses. With no delay i.e. zero firing angle a thyristor conducts for the complete half-cycle and no current flows in the field. The direction of the field depends on which pulse train is delayed and therefore the motor is reversible by this means. In a further embodiment Fig. 3 (not shown) two field coils (41, 42) are arranged in series with respective thyristors to produce opposing magnetic fields the thyristor being controlled to conduct alternately, the strength and direction of the resultant field depending on the length of the periods of conduction of one thyristor to that of the other. In an alternative arrangement the thyristors are connected in parallel with the coils and a current limiting device is used in the rectifier circuit, also the use of silicon controlled switches instead of thyristors is referred to. 'The speed of the motor may be kept constant by'comparing a speed signal from a tachometer with a reference signal and using the error signal to control the pulse generator and vary the delay between the two series of pulses and alter the speed of the motor until the error is zero. -
Patent GB-1213313-A (GB)
Title: Improvements in and relating to cases of metallic material
Inventor: SUMPF MAX
IPC: G01D11/24
Filed: 1967-11-27
Abstract: 1,213,313. Instrument casings. OTTO BRœCKNER K.G. Nov.27, 1967, No.53839/67. Heading G1Q. A metallic case for an electric instrument consists of a rectangular primatic cover open at front and rear and reinforced by rectangular frames 4, 5 around its front and rear edges. The cover is bent up from an elongate length of sheet metal whose ends are butt jointed at 2 by being riveted to a strip 3 on the inside of the case and bridging the butt joint. The frames also have ends 6 butt jointed together and bridged by T-shaped pieces 7, 8. Both frames are braced by angle pieces 9 on the inside of the case along the corners of the cover, secured to the frames. The securing is by projections 14 bent out of the frames to pass through slots (13), and then bent over. The ends of the angle pieces are split and bent over to overlap at 15, threaded holes being provided in the bent over parts for mounting the instrument. Alternatively strips having threaded holes may be attached to diametrically opposite parts of the frames to provide a mounting for the instrument.
Patent GB-1245809-A (GB)
Title: Molybdate orange pigment
IPC: C09C1/00
Filed: 1968-11-14
Abstract: 1,245,809. Molybdate orange pigments. E.I. DU PONT DE NEMOURS & CO. 14 Nov., 1968 [15 Nov., 1967], No. 54113/68. Heading C4A. Molybdate orange pigment is characterized by 4-9 mol. per cent lead molybdate, 1-7 mol. per cent lead sulphate, and not more than 25 mol. per cent monoclinic lead chromate, and is produced by passing a chromate-molybdatesulphate salt solution of the appropriate molar proportions into a stirred lead salt solution through a jet at a linear velocity of at least 48 feet/second. Chloride ion addition, and successive silica and alumina coatings may be effected in known manner.
Patent GB-1100449-A (GB)
Title: Improvements in tobacco smoke filter element
IPC: A24D3/06
Filed: 1966-12-02
Abstract: A tobacco smoke filter element comprises a resilient tubular outer wrapper surrounding a filler of compressible liquid-entraining material arranged to permit axial filtering flow of smoke therethrough and has disposed therein at least one frangible capsule containing a liquid smoke-treating medium and a multiplicity of particles of active carbon moisturized with said liquid.  The capsule is broken to release its liquid content into the filler by squeezing the outer wrapper.  The filler is formed from conventional smoke filter materials optionally coated with a stiffening material.  A single relatively large capsule or a number of capsules of small diameter, including microcapsules, may be used.  Suitable encapsulating materials include hard petroleum wax, gelatine and frangible plastics.  The liquid used is water, optionally including a surfactant, flavourants such as lemon oil, decongestants, or metal salts.  The active carbon may be replaced by other adsorptive materials such as silica gel, zeolites or chabazites.
Patent GB-1377655-A (GB)
Title: Vitreous enamelling steel
IPC: C21D9/46
Filed: 1971-11-22
Abstract: 1377655 Producing steel NIPPON KOKAN K K 22 Nov 1971 [21 Nov 1970] 54217/71 Heading C7A A process for manufacturing steels suitable for vitreous enamelling consists of (i) casting a steel consisting by weight of:- 0.03 to 0.15% carbon 0.10 to 0.50% manganese 0.005 to 0.06% sol. aluminium 0.01 to 0.10% titanium the balance being iron and impurities, e.g. P, S, N, O; slabbing and hot-rolling the cast ingots or billets; pickling and decarburizing to a carbon content less than 0.01%; cold-rolling and temperrolling. Alternatively, the decarburization can take place after the cold-rolling.
Patent GB-1126198-A (GB)
Title: Cloth handling apparatus
Inventor: BOOTH CHARLES WITNEY
IPC: B65H45/101
Filed: 1965-12-22
Abstract: 1,126,198. Folding fabrics. PRICES TAILORS Ltd. 20 March, 1967 [22 Dec., 1965], No. 54282/65. Heading D1S. Apparatus for handling successive lengths of fabric comprises a device 9 to receive and cuttle each successive fabric length, means 16, 21 to convey each cuttled length to a folding device 28, 29 which folds the fabric laterally, and means 33, 34 for taking each folded fabric length from the device 28, 29 and delivering it from the apparatus. A fabric cutting table 1, Fig. 1B, has two endless conveyor belts 2 at the delivery end of which guide belts 4 are supported. A cuttling table 9 is pivoted at 10 on a wheeled carriage 11 reciprocable through a push rod 12 by a crank mechanism 14 preferably driven from the drive for the conveyors 2. The free edge of the table 9 is provided with forks (9A). Fig. 3B (not shown), movable between narrow conveyor belts 16 which pass over a platform 19 having arms 20 projecting between the forks (9A). Two further conveyor belts 21, Fig. 1A, are driven from a motor 27 through a transmission 24, 25, 26 and transmit the drive to the belts 16. A folding guide surface 28, similar in shape to a riding saddle, is situated below the belts 21 and has a central slot through which a folding plate 29 is reciprocable. Rollers 31, 32, Fig. 2, are spring urged together and support endless belts 33, 34 which pass over a common roller 35, upper rollers 36, 37 and tensioning rollers 38, 39 and are driven through a transmission 40, 41 from the motor 27. A weight 42 acts on an arm 43 carrying a compensating roller 44 to permit the belt 33 to move away from the belt 34 as they pass over the roller 35 with a thickness of fabric there between. In operation, the belts 16, 21, 33, 34 are run continuously. As each length of fabric enters the feed mechanism from the table I the carriage 11 commences to reciprocate and the fabric is cuttled. When the trailing edge clears a beam from a lamp 7 to a photocell 8, the table 9 is lowered to the position indicated by a ram and cylinder assembly 15 to transfer the cuttled fabric onto the belts 16 which feed the fabric onto the bolts 21 over the surface 28. The table 9 is raised and cuttling of the next length commences. When the leading edge of the first length interrupts the beam from a lamp 28A projected onto a reflector on the other side of the slot to be received back by a photocell 28B, the plate 29 is raised by a pneumatic ram and cylinder assembly 30 to push the centre of the cuttled fabric draped over the surface 28 upwards into the nip between the belts 33, 34 which deliver the folded length. The plate 29 is then retracted. A feeler operated microswitch 45, Fig. 1A, may be provided to stop the machine if the folder mechanism fails to transfer the fabric to the belts 33, 34.