baber/WOPTO huggingface dataset:
Patent GB-1384338-A (GB)
Title: Microwave signal detector
IPC: G01R29/08
Filed: 1972-11-15
Abstract: 1384338 Radio receiving arrangements N A BENNETT 19 Sept 1973 [15 Nov 1972] 52696/72 Heading H3Q A microwave signal detector comprises radiation receiving means associated with a detector diode D1, Fig. 1, and a chopping diode D2 which is fed with a signal derived from noise which has passed through a narrow band pass filter FL and then amplified and clipped to produce a square wave which is applied to the diode D2 to switch it: the diode D1 detects a received microwave signal which is modulated at the switching rate of the diode D2, the detected signal being passed through the filter FL to produce a positive feedback loop. In the embodiment the amplified output from filter FL is also applied to an output stage OP to produce an indication by means of loudspeaker LS; alternatively an optical indication may be given. In a detailed embodiment, the detector diode D1, Fig. 2, is coupled to a first amplifier A1 comprising D.C. coupled transistors TR1, TR2, TR3 with stabilizing negative feedback over resistors R5, R6, R7 and capacitor C2. The output is applied over resistor R8 to filter FL comprising circuit L1, C3 tuned, e.g. to 1 KHz. The output of filter FL is applied to a second amplifier A2 comprising integrated circuit IC1, the gain of which can be adjusted by variation of negative feedback by means of potentiometer VR1. The output from amplifier A2 is applied to the limiting amplifier A3 comprising integrated circuit IC2, the output of which is applied over capacitor C7 to the chopping diode D2; a further diode D4 provides D.C. restoration. The output from amplifier A2 is also applied to output circuit OP comprising a transistor TR4 driving loudspeaker LS, resistor R12 limiting the current through the loudspeaker. The output circuit is arranged to have a threshold value, diode D3 providing D.C. restoration.
Patent GB-1283853-A (GB)
Title: Photographic camera
IPC: G03B9/58
Filed: 1970-11-09
Abstract: 1283853 Photographic shutters PRONTORWERK ALFRED GAUTHIER G m b H 9 Nov 1970 [1 Dec 1969] 53177/70 Heading G2A A camera having an objective lens operating with a constant diaphragm aperture has a shutter consisting of a single main shutter blade 5 which is reciprocated across a shutter opening 3 and an auxiliary blade 12 which sweeps across the shutter opening whilst the opening is uncovered. This has the effect of reducing the exposure time compared with that obtainable with the use of the main blade alone. Upon depression of shutter release 9 a driving lever 7 pivotally mounted thereon is tensioned by a lug 7a engaging a lug 2a formed on a fixed base plate 2. A tip 7b of lever 7 follows the chain-clot line shown during this movement so that the tip 7b lies behind a lug 5a of blade 5, at the same time a pin 28 on lever 7 moves an armature lever 23 so that an armature 22 contacts an electromagnet 21. When the engagement between lugs 2a and 7a is lost, lever 7 drives blade 5 to open position where it is held by engagement of extension 5b with a latch 29. Auxiliary blade 12 is held in its initial position by a lug 12a contacting blade 5. Movement of blade 5 thus allows blade 12 to sweep across opening 3 under the action of spring 14, the strength of which is chosen so that the opening is fully uncovered before blade 12 starts overlapping the opening. The exposure time is determined by the ambient illumination received upon a photo-resistor 20, at the end of the period the electromagnet is deenergized to allow blades 5, 12 to move back to their initial positions. The shutter may alternatively be mechanically timed the amount of rotation of the main blade being controlled by a stepped reflex stop. The auxiliary blade may be formed with wedge shaped cutouts to produce a more linear exposure time characteristic. The invention may also be applied to a sliding plate shutter, Figs. 15, 16 (not shown).
Patent GB-1210923-A (GB)
Title: Improvements in or relating to sealed double-walled units
IPC: E06B3/677
Filed: 1967-11-22
Abstract: 1,210,923. Double glazing. W. R. GRACE & CO. 22 Nov., 1967 [23 Nov., 1966], No. 53200/67. Heading E1R. [Also in Division F4] In a sealed double walled unit such as a double glazed unit Fig. 1a, or a double walled container, Fig. 2a, as may be used in the pharmaceutical industries, the space between the two walls 2 or 2' is sealed by a sealing element including a self supporting desiccant rod 4 or 4' in the form of a self supporting central core 6 or 6' desiccant material surrounded by a jack 5 or 5' of moisture pervious material. In the rod specifically described the core is of a molecular sieve or silica gel mixed with a suitable fluid binder and the jacket is of thin pressed cardboard and a sealing material 7 or 7' which may also be an adhesive seals the rod to the walls 2, or 2'. Methods of assembling the elements together are described. The rod may be formed by extruding simultaneously from an extruder head with the core through an inner nozzle and the jacket through a surrounding outer nozzle..
Patent GB-1492050-A (GB)
Title: Process for the production of berlin blue
IPC: C01C3/12
Filed: 1974-12-10
Abstract: 1492050 Berlin blue DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT 10 Dec 1974 [10 Dec 1973] 53319/74 Addition to 1438064 Heading ClA Berlin blue (ferric ferrocyanide) is produced by reacting calcium ferrocyanide or sodium ferrocyanide, a ferrous salt and an inorganic or organic potassium salt simultaneously at a pH of up to 6 to form Berlin white (ferrous ferrocyanide), the temperature being initially in the range from 20‹ to 60‹ C., and oxidizing the Berlin white to Berlin blue. The reaction to obtain Berlin white may be accelerated by increasing the temperature up to the boiling temperature of the reaction mixture.
Patent GB-1169950-A (GB)
Title: Selective Hydrogenation
Inventor: FREVEL LUDO KARL
IPC: C07C5/08
Filed: 1966-12-01
Abstract: 1,169,950. Selective hydrogenation catalysts. DOW CHEMICAL CO. 1 Dec., 1966 [2 Dec., 1965], No. 53794/66. Heading B1E. [Also in Division C5] Selective hydrogenation catalysts containing copper and from a trace up to 20% of Ni, Zn, Co, Mo, Mn, V, W, Cd, Ti, Zr or U are contacted with a basic alkali metal compound, heated at temperatures up to 650‹C. and leaching the product with water. Examples describe the treatment of fresh and spent catalysts supported on diatomaceous earth, combinations described being Cu-Ni, Cu-Co, Cu-Mo and Cu-U.
Patent GB-1162103-A (GB)
Title: Improvements in or relating to Shaft Seals
Inventor: WILDA ARTHUR
IPC: F16J15/34
Filed: 1966-12-05
Abstract: 1,162,103. Shaft seals. WISSENSCHAFTLICH - TECHNISCHES ZENTRUM (WTZ) PUMPEN UND VERDICHTER VEB. 5 Dec., 1966, No. 54353/66. Heading F2B. A rotary shaft seal comprises two non- rotary sealing rings 6, 7 co-operating with at least one ring 8 rotatable with the shaft 4, an annular chamber bounded partly by the rings 6, 7 and through which a coolant is circulated, the chamber being divided into two chambers 1, 2 by a radial wall 3 which co-operates with a rotatable part, e.g. ring 8, to form a choke between the chambers for the coolant. Coolant, e.g. oil or water, is supplied to the chamber 1 at pressure Pz1 exceeding the pressure PG of the gas to be sealed and the choke 5 is designed to give a coolant pressure Pz2 in chamber 2 such that Pz2-Pb is approximately equal to Pz1-Pa, Pb being atmospheric pressure. The amount of coolant flow is controlled in chamber 1 by valve 9 and in chamber 2 by valves 10 and 11. In a modification, Fig. 2 (not shown), each non-rotary ring (6, 7) co-operates with a respective rotary ring (12, 13) and the choke (5) is formed between the wall (3) and the shaft (4).
Patent GB-1525465-A (GB)
Title: Method of cleaning surfaces
IPC: A47L13/10
Filed: 1975-12-15
Abstract: 1525465 Cleaning surfaces SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 15 Dec 1975 [17 Dec 1974] 54419/74 Heading A4F A surface contaminated with soot, such as a wall, ceiling or floor, is cleaned by applying to the surface a solution or dispersion of a thermoplastic rubber, allowing the liquid to evaporate so that a coherent film of the rubber is formed, and removing the film from the surface. The thermoplastic rubber may comprise a block copolymer of a conjugated diene, e.g. butadiene or isoprene, and a mono-alkenyl substituted aromatic hydrocarbon e.g. styrene. A preferred copolymer has the general formula A-B-A where the A's are similar or dissimilar polymer blocks of a mono-alkenyl substituted aromatic hydrocarbon, B is a polymer block of a conjugated diene hydrocarbon, each block A has a molecular weight of 5000 to 50000, block B has a molecular weight of 40000 to 500000, and A constitutes 10 to 65 wt. per cent of the copolymer. The block copolymer may be partially or fully hydrogenated to saturate the olefinic double bonds and/or the benzene rings. The elastomeric compound may contain coumaroneindene resin or polystyrene, mineral fillers and rubber extender oils, and may be dissolved in benzene toluene, xylene, cumene, styrene, methylene chloride, tetrachloromethane, trichloroethylene, methyl isobutylketone or ethyl acetate. The solution may be dispersed in water to form a latex. The solution may be applied by brushing, rolling or spraying to form a dried film of 20 to 2000 microns, and the film may be removed by peeling. The method may be used to clean soot from the surface.
Patent GB-1124270-A (GB)
Title: Herbicidal compositions and methods of application thereof
IPC: C07D277/40
Filed: 1965-12-23
Abstract: 5 - Halo - 2 - alkanoamido - thiazoles of the formula <FORM:1124270/C2/1> wherein Y is a C1-C6 alkanoyl group, are prepared by acylating 2-aminothiazole with an acid halide or anhydride of a lower alkanoic acid and halogenating the 2-alkanoamido-thiazole thus obtained.  The following 5-halo-2-alkanoamido-thiazoles have been prepared by this method and have been found to have herbicidal activity (see Division A5/A6): 2-formamido - 5 - chlorothiazole, N - (5 - chloro-2 - thiazolyl) - propionamide, N - (5 - bromo-2 - thiazolyl) - propionamide, N - (5 - chloro-2 - thiazolyl) - butyramide and N - (5 - bromo-2-thiazolyl)-butyramide.ALSO:A herbicidal composition comprises a compound of the general formula: <FORM:1124270/A5-A6/1> wherein Y is a hydrogen atom or a C1-C6 alkanoyl group and a carrier.  The compositions may be in the form of solutions, emulsions, suspensions, dispersible powders, emulsifiable concentrates, granules or dusts.  Non-ionic emulsifiers are specified as adjuvants which may be present in the compositions.
Patent GB-1488147-A (GB)
Title: Flow control valve
IPC: G05D7/01
Filed: 1974-12-19
Abstract: 1488147 Dispensing liquids ITT INDUSTRIES Inc 19 Dec 1974 [2 Jan 1974] 54872/74 Heading A4T [Also in Division F2] In a vapour recovery system (used, for example in filling an automobile fuel tank) Fig. 1, a valve Fig. 2 has a housing with first and second through passages 40, 38, a restriction 56 in the second passage and a first movable member 54 dividing a cavity into sections 48, 50, there being communication means 58; 60 and 64 between the restriction and one cavity 48 and between passage 38 and the other cavity; a second movable member 84 being sealed to a valve element 66 which is fixed to the first member and seated in the first passage to be unseated in operation by differential pressure across the restriction. In the system the valve 18 receives fuel from a pump 34, and vapour via a line 26 from a vehicle tank, which is passed by a blower 35 via a condenser 30 to a fuel storage tank 12.
Patent GB-1215177-A (GB)
Title: Improvements in or relating to the trimming of flash from metal
IPC: B23D79/00
Filed: 1968-11-21
Abstract: 1,215,177. Removing flash from metal. L'AIR LIQUIDE SOC. ANON. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE. 21 Nov., 1968 [23 Nov., 1967], No. 55298/68. Heading B3V. Flash produced at the start of a machining pass on a metal workpiece at an edge 18 transverse to the sides 6, 8 of the pass, is removed by blowing oxygen on to the flash before it has cooled to the point where it can no longer burn in oxygen without preheating. A torch nozzle is shown at 2 at the beginning of a scarfing operation on a steel slab and at 4 when it has effected the pass. The flush formed at the edge 18 of the scarfing pass during the starting operation is removed by oxygen nozzles 10, 12, 14, 16 fixed to the torch support and inclined at 10- 70 degrees to the workpiece surface. The flash at the side 8 of the pass is removed by oxygen nozzles 20, 22, 24 inclined at 30-60 degrees to the workpiece surface and 30-50 degrees with the direction 26. Nozzles 28, 30 may be arranged on the side 6 of the pass inclined at 20-90 degrees with the workpiece surface and 0-70 degrees with direction 26. The apparatus may be used to cut a blind hole at the end of a bar for producing seamless tubes.
Patent GB-1339819-A (GB)
Title: Electro-chemical treatment of aluminium or aluminium alloy  vessels
IPC: C25D11/04
Filed: 1971-11-29
Abstract: 1339819 Anodizing inside aluminium vessels HœTÍGEPGYAR 29 Nov 1971 [16 Dec 1970] 55298/71 HeadingC7B The inner surface of an aluminium metal or alloy vessel 4, intended for storing food or drink e.g. a beer barrel, is treated by deoxidizing it e.g. by etching with NaOH and neutralizing with HNO 3 , filling the vessel with electrolyte e.g.H 2  SO 4  and connecting it as anode, insulating a cathodically connected pipe 5 from and locating it in the vessel using an insulating insert 6 in its orifice, applying A.C. of 20 to 42 v at an initial C.D. of 4 to 8 A/dm<SP>2</SP> of inner surface, preferably reducing exponentially to zero, for at least 5 minutes to provide an anodic oxide layer e.g. 0À8 to 1À2 Á thick on the surface, removing the electrolyte and cathode-pipe, rinsing and drying the vessel prior to lacquer coating. The inner surface of the cathode-pipe 5 may be insulated by a plastic pipe 3 which extends to connect it to an electrolyte storage tank 1 in which is arranged a heating or cooling coil 12. The insert 6 has longitudinal openings therein for permitting electrolyte (and gas) flow therethrough; electrolyte received on tray 8 is pumped back to storage tank 1 via pipes 10 and 11.
Patent GB-1375978-A (GB)
Title: Automatic frequency control circuits
Inventor: AVINS J
IPC: H03J7/10
Filed: 1971-12-01
Abstract: 1375978 Automatic frequency control; tuning receivers; differential amplifiers RCA CORPORATION 1 Dec 1971 [4 Dec 1970] 55711/71 Headings H3A H3Q and H3T A frequency control circuit comprises a voltage divider 25 having a variable tap on one of its members arm 27 coupled to a variable reactance device 21 in an oscillator circuit 11-15, a frequency discriminator 20 responsive to the oscillator output to produce an error signal dependent upon the frequency deviation of the oscillator output from a predetermined value, a first circuit including transistors 30, 31 of opposite conductivity types having either one or both of the bases coupled to the output of the discriminator 20 for providing a current 28 directly proportional to the error signal, a second circuit 35, 36 for injecting a portion of the current into the divider 25 to provide uniform loop gain throughout the AFC tuning range. An AFC defeat switch (not shown) may be provided in between the circuit 30, 31 and the voltage divider 25 so that the oscillator 14 is manually tuned over the tuning range for the required frequency and then the switch is closed for superposing the AFC error signal from the discriminator 20 on the bias setting of divider 25 for frequency stabilizing 14. In the embodiment of Fig. 2 (not shown), the discriminator supplies a single ended output to one of the transistors while the other transistor is supplied with a current from a current source equal to the steady value of the discriminator output. The differential amplifier 30-33 forms a push-pull current mirror including temperature compensating diodes 32, 33.
Patent GB-1483000-A (GB)
Title: Process for inhibiting corrosion of reinforcing iron or steel placed in cement products
IPC: C04B28/02
Filed: 1974-12-24
Abstract: 1483000 Treating cement to inhibit metallic corrosion ONODA CEMENT CO Ltd 24 Dec 1974 [27 Dec 1973 12 March 1974] 55867/74 Heading C1H A process for inhibiting corrosion of reinforcing iron or steel placed in cement products containing a chloride (e.g. as hardening accelerator or antifreezing agent) comprises adding to a paste of an unhardened cement product a nitrite and a phosphate and/or borate, wherein the phosphate and/or borate conforms to one of the following structural formulµ wherein, in the case of a phosphate, n, n<SP>1</SP> and n<SP>11</SP> are mean mols of ethylene oxide (1-20) and R, R<SP>1</SP> and R<SP>11</SP> are alkyl, phenyl or alkylaryl (C 6-30 ), and wherein, in the case of a borate, I and m are 1-20, and R and R<SP>1</SP> are alkyl, phenyl or alkylaryl (C 6-21 ). Many phosphates and borates are particularly mentioned. The nitrite may amount to ¢-1/500 weight parts and the phosphate and/or borate 1/50-1/500 weight parts per weight part of the chloride. Sodium, potassium, magnesium, calcium and zinc nitrites are mentioned. The pH of the phosphate is adjusted to above 6À0 if the nitrite and phosphate are to be premixed. The examples disclose the addition to cement, sand and gravel in the production of concrete of the following: (1) calcium chloride, sodium nitrite and mixture of mono- and di-polyoxyethylene phenyl phosphates, (2) calcium chloride, sodium nitrite and polyoxyethylene-bis-glycerol borate monostearate or, alternatively, bis-glycerol borate, bis-glycerol borate stearate, polyoxyethylene-bis-glycerol borate or a mixture of bis-glycerol borate and polyoxyethylene phenyl phosphate, and (3) chloride (as sea sand), calcium nitrite and bisglycerol borate.
Patent GB-1489618-A (GB)
Title: Method of producing aluminium-coated steel
IPC: C23C4/02
Filed: 1974-12-30
Abstract: 1489618 Spraying steel with Al and posttreating SUMITOMO METAL INDUSTRIES Ltd 30 Dec 1974 [28 Dec 1973 4 Oct 1974 (2)] 56059/74 Heading C7F A steel surface is maintained at 100-500‹C and sprayed with Al; the Al-coated steel is then worked to an area reduction of 5-80%. This may be done by cold-rolling, optionally followed by heating at 150-600‹C for 3 minutes to 24 hours; alternatively rolling may take place at 150-600‹C. The steel is pre-treated by grit- or shot-blasting or pickling followed by washing; the coating thickness may be 30-300Á and spraying may be in a reducing, N 2 , or Ar atmosphere.
Patent GB-1375384-A (GB)
IPC: B23D31/04
Filed: 1971-12-06
Abstract: 1375384 Shearing WEAN UNITED Inc 6 Dec 1971 [22 Jan 1970] 56533/71 Heading B3W A blade holder 15 connected to a driving crank 13 by pitmans 16 so guided that during the return stroke the holder pivots about trunnions 26 (27), Fig. 1 (not shown), to cause the blade face 19a to form an acute angle with the material Sh 71 to be sheared. The trunnions 26, (27) secured to the holder 15 are located in cylindrical bushings (28), Fig. 1 (not shown), in blocks 29 slidable in guideways 32 and 34 in the shear frame 11. The relative positions of the trunnions and the pivot connections 18 between the holder 15 and the pitmans and the angular disposition of the crank-shaft 13 are chosen to cause a face 33 on each block to be urged against the guideway 34 during the shearing stroke and a face 33A to be urged against guideway 32 during the return stroke. Pivotal movement of the holder 15 during the shearing and return strokes respectively is limited by engagement of stops 40 and 35 with the frame. To ensure that pivoting takes place, a piston and cylinder device 36 is provided to act between the frame and the holder 15.
Patent GB-1247300-A (GB)
Title: Process for the production of phosphorus trioxide
Inventor: HEINZ DIETER
IPC: C01B25/12
Filed: 1969-11-19
Abstract: 1,247,300. Phosphorus trioxide. STICKSTOFFWERK PIESTERITZ VEB. 19 Nov., 1969, No. 56663/69. Heading C1A. Phosphorus trioxide is obtained by the oxidation of phosphorus with a mixture of oxygen and nitrogen or an oxide of nitrogen in the presence of a catalyst. The reaction is preferably carried out at 550-750‹ C. and 1-200 mm. Hg pressure, with about 0À1% by weight of the catalyst, which is an alkali metal hydroxide, carbonate or phosphate, barium hydroxide, or calcium carbonate. With recycling of unreacted phosphorus the yield of P 4 O 6  is 80-95%.
Patent GB-1332730-A (GB)
Title: Wristwatch
IPC: G04B37/04
Filed: 1971-12-07
Abstract: 1332730 Watches B LOEB 7 Dec 1971 [8 Dec 1970] 56871/71 Heading G3T A wristwatch comprises an inner case portion 1 which is provided with a side wall 3, a base 4, and a glass 2 and which is releasably fastened in a peripheral case portion 6 so that the latter may be reversed with respect to the portion 1 to present either of its different opposed faces to the viewer and thus alter the appearance of the watch. The portion 6 is formed of two parts 6a, b which are joined along a median plane and may be of different metals or have a different ornamentation or surface finish. An internal groove 10 in the portion 6 contains a wire spring 11 to engage a corresponding groove 9 in the portion 1. The part 6a is further provided with a catch 14 which engages in one of two depressions 13 in the portion 1.
Patent GB-1323449-A (GB)
Title: Emergency power-generating set
IPC: H02J9/08
Filed: 1970-11-30
Abstract: 1323449 Standby power supply systems KLOCKNER-HUMBOLDT-DEUTZ AG 30 Nov 1970 [3 Dec 1969] 56900/70 Heading H2H A standby power supply system comprises a generator 2, an electric motor 3, a flywheel 4, a super-charged internal combustion engine 6 and a cylinder 14 of compressed air which, in the event of a changeover from mains operation to emergency power generation, supplies at least some of the air for supercharging the engine. The compressor of the supercharger 7 is driven by an exhaust gas turbine and supplies air to the engine cylinders 9 via a pipe 10. To enable the turbine to reach full speed as rapidly as possible, the compressor also receives air from the cylinder 14 via a pressure reducing valve 13 and a valve 15 the opening of which varies in dependence on the turbine speed. The valve is closed when the turbine reaches full speed.
Patent GB-1150217-A (GB)
Title: Electronic Circuit Structure.
IPC: H05K7/10
Filed: 1966-12-21
Abstract: 1,150,217. Two-part couplings. C. OLIVETTI & CO. Inc. S.p.A. 21 Dec., 1966 [24 Dec., 1965], No. 57096/66. Heading H2E. [Also in Division H1] In a circuit assembly, e.g. for an electronic computer, a plurality of main circuit boards 1 carrying interconnected active and/or passive components, and having on their major surfaces an array of contact areas 3, are detachably disposed in parallel planes alternately with connection boards 4 carrying resilient connector members 8 which make contact with areas 3 on main boards 1. As described, each main board 1 comprises a multilayer printed circuit board formed by etching, and including deposited passive components; interlayer connections are formed where required through the insulating layers of the board. The external insulating layers of the board bear the contact areas 3, and also solid-state circuit blocks 2, which may have laterally extending terminals for connection to areas 3 by electron beam soldering or thermocompression; alternatively, the circuit blocks 2 may have, or may constitute, male plug-in members which engage female connectors on board 1. Each connection board 4 comprises an insulating frame formed by bonding together two corrugated sheets to provide channels 7 for forced-air cooling of circuit blocks 2, which protrude into channels 7 through apertures 9 therein. Opposed connector members 8 are connected through the board 4; connector members 8 on the same side of a board 4 may be interconnected by printed wiring. Boards 1 and 4 are releasably mounted between two mounting frames 10 (one only is shown), comprising grooved guides 11, 12 which receive edges of the boards and are subsequently clamped together with elastic spacers 16 by a "trellis" network 17. Main boards 1 may also be provided with edge connectors.