baber/WOPTO huggingface dataset:
Patent GB-1501879-A (GB)
Title: Gas turbine engine
IPC: F02C7/105
Filed: 1975-11-14
Abstract: 1501879 Gas turbine engine with rotary regenerative heat exchanger ROLLS-ROYCE Ltd 14 Nov 1975 [21 Nov 1974] 50406/74 Headings F1G and F1J [Also in Division F4] The invention relates to a gas turbine engine in which air from the compressor is pre-heated in a rotary regenerative heat exchanger the rotational axis of which is parallel with the engine axis, the compressed air passing radially inwardly through a first segmental area of the heat exchanger matrix and the turbine exhaust gases passing radially outwardly through a second segmental area of the matrix. The engine shown is a gas turbine ducted fan engine and the rotary heat exchanger matrix 23 is of frusto-conical form and is disposed coaxially of the engine downstream of the LP turbine 14. Air from the compressor 11 of the core engine passes through passage 28 which divides into four tapering chambers 26 disposed adjacent the periphery of the heat exchanger matrix 23. The air flows radially inwardly through the matrix as indicated by arrows being thereby pre-heated, into four tapering chambers 29 which combine into annular passage 30, and then enters the combustion section 12. The combustion gases flow through the HP turbine 13 and LP turbine 14 and discharge through annular passage 32 from which the gases discharge between the chambers 29. through the matrix 23, through the spaces between the chambers 26 and thence to the exhaust duct 34 and propulsion nozzle 35. The HP turbine drives the compressor, and the LP turbine drives the fan 17, also, through gearing 21, the heat exchanger matrix 23, the matrix being rotatably mounted on bearings 24, 25.
Patent GB-1471819-A (GB)
Title: Camera for stereophotography
IPC: G03B35/00
Filed: 1975-12-09
Abstract: 1471819 Stereoscopic photography DIMENSIONAL DEVELOPMENT CORP 9 Dec 1975 50432/75 Addition to 1445585 Heading G2A In the camera claimed in Claim 2 of Specification 1445585, the value of W is not substantially greater than 5 mils, and the range of values of c is extended to from 1À0 to 10À0.
Patent GB-1077960-A (GB)
Title: Improvements in electron tubes
IPC: H01J25/587
Filed: 1963-12-24
Abstract: 1,077,960. Magnetrons. PHILIPS ELECTRICAL & ASSOCIATED INDUSTRIES Ltd. (Philips' Gloeilampenfabrieken N.V.). Heading H1D. A tunable magnetron including a substantially cylindrical anode structure 1 of electrically conductive material enclosing a plurality of sectors 2 constituting cavity resonators, the sectors being interconnected by apertures 5 forming part of an annular groove on and penetrating a depth into an end face of the anode, has electrically conductive parts comprising first and second portions secured to a common support rotatable about an axis concentric with the groove, the parts being displaceably arranged in the apertures, the arrangement being such that each of the apertures is filled completely from the end surface to an intermediate depth less than the depth of the groove by the first portion of the conductive part and such that the filling of the aperture by the second portion of the conductive part varies as the support is rotated relative to the anode structure. As shown, the displaceable conductive part comprises a conductive cylinder 8 having, below a critical depth in the grooves, a profiled inner surface forming recesses 21, the part above the critical depth constituting the first portion and - that below, the second portion. In an alternative embodiment, Fig. 8 (not shown), the part below the critical depth has recesses or holes (25) which pass partially or entirely through the second portion in a radial direction. The inner wall of anode 1 may have a roll (24) enclosing part of the recess 5.
Patent GB-1095704-A (GB)
Title: Thin film resistors
Inventor: BALDE JOHN WILLIAM
IPC: H01L49/02
Filed: 1964-12-16
Abstract: <PICT:1095704/C6-C7/1> A resistive thin film is formed on a substrate by cathodic sputtering, reactive sputtering or vacuum evaporation. The substrate may be of glass, plastic, mica or ceramic material and the thin film may be of one of a number of metals, or compounds thereof.  In Fig. 7 a thin film of tantalum nitride is deposited over gold terminals, previously deposited and fired, on to a glass microscope slide which has previously been washed in a detergent, rinsed and boiled in acqua regia or nitrogen peroxide.  The cathode 79 is of tantalum (though titanium, niobium aluminium, hafnium zirconium &c., or a coating or wrapping thereof, may be used).  The chamber 74 is first evacuated to 2 x10-6 mm. of mercury then the substrate sheet 71 is heated to 400 DEG C. after which nitrogen is introduced into chamber 74 at a dynamic pressure followed by argon at a pressure of 15 microns of mercury.  During sputtering the partial pressure of the nitrogen is maintained at 6 x10-4 mm. of mercury. Sputtering is conducted for about 5 minutes using a 5000 volts D.C. or an asymmetric or biased D.C. source.
Patent GB-1462158-A (GB)
Title: Preparation of colour-patterned plastics sheet
IPC: D06P5/28
Filed: 1975-12-15
Abstract: 1462158 Pattern-dyed plastics laminates CARL FREUDENBERG 15 Dec 1975 [18 Dec 1974] 51215/75 Heading B5N [Also in Divisions B2 and B6] A sheet of plastics material having a dye pattern extending throughout its thickness is made by applying a gas-permeable layer of fusible plastics to a substrate sheet which bears one or more sublimable dispersion dyes in the desired pattern, and heating to sublime the dye and to fuse the plastics. The plastics may be applied as powder, granules or an open-cell foam sheet, and may comprise polyethylene, pvc, polyurethane, polyamide or rubber. The substrate may be a release paper, which may be embossed, or a permanent non-woven, woven or knitted fabric backing, e.g. acrylate-bonded polyamide fleece. Such permanent backings may be bonded to the sheet either simultaneously with its formation on a release paper or by fusion or adhesive after its formation. Heat may be applied, at least in part from the side side of the substrate remote from the dye, by plate, infra-red or belt calender. Suitable dyes, subliming at 140-250 C, are listed.
Patent GB-1496168-A (GB)
Title: Orthodontic appliance
IPC: A61C7/08
Filed: 1974-11-26
Abstract: 1496168 Orthodontic appliances E O BERGERSEN 26 Nov 1974 [25 Jan 1974] 51217/74 Heading A5R An orthodontic appliance includes a material having an intrinsic physical or chemical characteristic which, when the appliance is worn in the mouth, changes the visual appearance of the material in dependence on tune so that the period for which the appliance has been worn in the mouth can be determined. The material may include, preferably in the ratio of 1:1, transparent water blush polyvinyl chloride which becomes increasingly opaque when it is exposed to moisture. The construction of the appliance is substantially as described in Specification 1176048.
Patent GB-1195290-A (GB)
Title: Pattern Feature Extracting System
IPC: G06V10/20
Filed: 1967-11-10
Abstract: 1,195,290. Character recognition. FUJITSU Ltd. 10 Nov., 1967 [10 Nov., 1966], No. 51249/67. Heading G4R. A pattern feature extraction system scans a character with a linear array of detecting elements using relative movement transverse to the array, the detecting element outputs being sampled cyclically to simulate essentially a scan along the array, the slopes of the waveform from this and of the waveforms from the detecting elements being used to deduce character line slope. A character is moved horizontally past a column of photo-cells to produce analogue signal trains each of which is differentiated, then subjected to both positive and negative thresholds to detect steep rises and falls of ink density in the horizontal direction. The resulting signals are sampled and serialized into two trains (for rises and falls respectively) to feed circuitry for detecting horizontal, vertical, forward sloping and backward sloping line elements. This circuitry also receives two signal trains representing occurrence of steep rises and falls respectively of ink density in the vertical direction, obtained by sampling and serializing into a single train the original analogue signals from the photo-cells then differentiating and thresholding the train as above.
Patent GB-1526840-A (GB)
Title: Reactive triazine dyestuffs
IPC: C09B62/08
Filed: 1975-12-15
Abstract: 1526840 Reactive triazine dyestuffs CIBAGEIGY 15 Dec 1975 [18 Dec 1974] 51352/75 Heading C4P Dyestuffs have the formula wherein R 1  is hydrogen or low-molecular alkyl, R 2  is H or low-molecular alkyl, aryl, or the radical of an organic dyestuff containing sulpho groups or, when R 1  is hydrogen, an -NH 2  group, and R 1  and R 2  together with the N atom can form a ring with at most 6 carbon atoms which may be interrupted by hetero atoms, X 1  and X 2  are H, sulpho, or the -N=N-K radical wherein K is the radical of a coupling component and, if one X is the -N = N-K radical, the other X is sulpho, and the benzene ring A can contain further substituents. R 2  may be the radical of a dyestuff, containing sulpho groups, of the monoazo or polyazo, metal complex, phthalocyanine, anthraquinone, stilbene, oxazine, dioxazine, triphenylmethane, nitro or azomethine series. The dyes contain a sulpho group in the ortho position to the amino group on the triazine ring. The dyestuffs may be prepared by condensation of the appropriate amines with 2,4,6-trifluoro- 1,3,5-triazine followed if appropriate by diazotization and coupling. The dyestuff may be attached to one amine (HNR 1 R 2 ). The dyes may be used for dyeing and printing silk, leather, wool, high molecular weight polyamide fibres and high molecular weight polyurethanes, and especially cellulosic materials such as linen, cellulose, regenerated cellulose and especially cotton.
Patent GB-1427046-A (GB)
Title: Hand lamp with pivotable wire cage section
IPC: F21L14/02
Filed: 1973-11-07
Abstract: 1427046 Lamps DANIEL WOODHEAD Inc 7 Nov 1973 [25 May 1973] 51606/73 Heading F4R A hand lamp comprises a hollow handle 11, a lamp bulb socket 13 mounted in the upper end of the handle, and a lamp bulb protecting member 20 also mounted on the upper end of the handle, the front section 21 of the member being made of wires or bars and being pivotally supported at its upper end on the rear section 22 of the member so as to be openable to give access to the bulb. The lower leg portions 56 of the sidemost wires or bars 27, 28 are adapted to be resiliently latched behind a pair of spaced plates 58, 59 secured to the handle when the front section is in the closed position. The central wires or bars 26 are joined at their lower ends by a plate or bar (70) which fits beneath a projecting lip (72) to form an additional latch, and the upper ends of the wires or bars are bent to form parallel legs 26a, 36, 37 (Fig. 5), with hooked ends 35 (Fig. 1) which are engaged in apertures 34 in a pair of discs 32, 33 to form the pivotal support. The rear section 22 of the member, which carries the discs 32, 33, may be of similar construction to the front section and form therewith a complete cage, or may alternatively be a solid metal reflector.
Patent GB-1406098-A (GB)
Title: Fluid flow machines
IPC: F04D29/08
Filed: 1972-11-08
Abstract: 1406098 Turbomachine shrouding B B C BROWN BOVERI & CO Ltd 8 Nov 1972 10 Nov 1971] 51616/72 Heading F1T To enable the clearance a between the tips of turbine or like rotor blades 2 and surrounding stator shroud segments 7 to be adjusted the mounting lugs 8 of the latter engage circumferential grooves 6 in stator blade carriers 3 via packing shims 12, 12'. The angles α, α' of the shroud surface and rotor blade tip respectively are the same.
Patent GB-1171917-A (GB)
Title: Improvements in Disc Brake Assemblies.
Inventor: FREHOLM OMAR ERIC
IPC: F16D65/092
Filed: 1966-11-18
Abstract: 1,171,917. Brake pad assemblies. BUDD CO. 18 Nov., 1966, No. 51708/66. Heading F2E. A disc brake assembly comprises disc brake subassembly which comprises at least one pad 15 secured to a backing sheet 17 of resilient material which, in turn is attached to a shoe-plate 10. The backing sheet 17 contacts a region of the shoe-plate 10 in line with the central portion(s) of the pad(s) 15 and the relative shapes of the shoe-plate surface and backing sheet 17 permit tilting of the pad(s) 15. The surface of the shoeplate is either formed with rounded projections 20 or cavities (Figs. 3, 4, not shown) and, in the latter case, the backing sheet projects into and contacts the lowest portion of the cavities. The backing sheet is either attached to the shoeplate by means of wires 13 passing through aligned holes 12 in pairs of studs 11, the wires pre-stressing the backing sheet, or by means of shouldered, hold-down screws (Fig. 4, not shown).
Patent GB-1407851-A (GB)
Title: Process for producing solid epoxy resin compositions
IPC: C08F8/00
Filed: 1972-11-09
Abstract: 1407851 Coated products DOW CHEMICAL CO 9 Nov 1972 [12 Nov 1971] 51863/72 Heading B2E [Also in Division C3] Steel is coated with a primer comprising a solid epoxy resin obtained by reacting (in any sequence) (I) a liquid epoxy resin, e.g. a diglycidyl ether of bisphenol A; (II) a compound containing more than one phenolic OH group, e.g. bisphenol A; and (III) a polymer of an alkadiene with (meth)acrylonitrile which oontaines 1-5% by wt. of -COOH groups. In an example a steel substrate was coated with an epoxy resin of the invention cured with dicyandiamide and 2-methylimidazole and pigmented with TiO 2 . It was cured 5 mins at 177‹C served as a primer for a conventional acrylic paint.
Patent GB-1020310-A (GB)
Title: Process for preparing fire retardant polyurethane foams
IPC: C08G18/50
Filed: 1964-12-22
Abstract: A rigid, cellular polyurethane is prepared by reacting an organic polyisocyanate with a polyfunctional active - hydrogen - containing substance in the presence of a blowing agent, 2% to 10% of antimony trichloride, and a chlorinecontaining organic compound of volability less than 0.002 g./sq. in./hr. at 105 DEG  C. in amount to provide 2 to 8% of chlorine, the percentages being based on the weight of the polyurethane. Preferably the reaction is carried out in the presence of 4.5 to 6% of antimony trichloride and the chlorine containing organic compound in amount to provide 3.5 to 5% of chlorine. The polyfunctional active-hydrogen-containing organic substance may be a polyfunctional polyester, polyesteramide or polyether.  The blowing agent may be carbon dioxide produced in situ or a fluorinated, saturated, aliphatic hydrocarbon.  The chlorine-containing organic compound may be a chlorinated naphthalene, polyvinyl chloride, a perchloropentacyclodecane or a chloro-polyol.
Patent GB-1241426-A (GB)
Title: Pulse spectrometer in particular for measuring nuclear resonances
Inventor: LAUKIEN GUNTHER RUDI
IPC: G01N24/08
Filed: 1968-11-04
Abstract: 1,241,426. Nuclear resonance spectrometers. G. R. LAUKIEN. Nov.4, 1968[Nov.2, 1967], No.52149/68. Heading G1N. In a nuclear magnetic resonance spectrometer in which the sample is subjected to pulses of high frequency energy, the carrier frequency and the duration and spacing of the pulses are all derived from a common source of high frequency base frequency whereby the phase of the carrier frequency at the start of each pulse is predetermined. As shown, a crystal controlled oscillator 10, or a decade frequency generator or frequency synthesizer, generates the base frequency (e.g. 1 MHz). Frequency multipliers or decade frequency generators 11, 11', 11" and phase shifters 16, 16', 16" give a selectable range of carrier frequencies and/or phases. A binary or decade frequency divider 12 has several different outputs in the range of 1 microsec-100 sec. and a logic circuit 13 selects a desired pulse programme. The selected pulses are formed at 14 and fed to control a gate circuit 15 so that it passes a pulse of high frequency energy during the duration of each pulse from the pulse former 14. The high frequency energy is fed via a frequency multiplier 17 and amplifier 18 to the sample probe 19. The resonance signal is passed through a preamplifier 23 to a main amplifier 24 which may also receive the carrier frequency via switch 25, frequency multiplier 17' and amplifier 26 for superheterodyne operation. The output from amplifier 24 may be converted to an intermediate frequency and fed to an oscillograph 28. Alternatively, the output from amplifier 24 may be rectified in phase rectifier 30 or by a diode circuit 31 and fed to the oscillograph 28 or through an integrator 32 to a recorder 33. The main amplifier may be gated to pass signals only when interesting information is expected. The oscillograph, integrator and recorder receive trigger signals from a further logic selection circuit 34 which controls the selection of pulse trains. Pulse trains. Successive pulses may have the same carrier frequency but differ in phase by e.g. 90 or 180 degrees. The first pulse may have a duration t followed after a time interval A by a series of pulses of duration 2t separated by intervals 2A. A sequency of triplets may comprise two pulses of equal length and a longer pulse in between. The same pulse trains may be repeated automatically and the results superimposed to reduce the interference level. Alternatively, the pulse trains can be continuously changed in accordance with a definite programme.
Patent GB-1160130-A (GB)
Title: Particle Analyzing apparatus and method of Utilizing Multiple Apertures
IPC: G01R19/00
Filed: 1966-11-22
Abstract: 1,160,130. Particle analyzing apparatus. COULTER ELECTRONICS Ltd. Nov.22, 1966 [Feb. 14, 1966], No.52318/66. Heading G1N. [Also in Division G4] Apparatus for counting the number of particles per unit volume of a fluid comprises means for passing the fluid through a plurality of apertures 205-207 and deriving from the passage of each particle a signal related to the size of the particle. The invention is concerned with detecting a clogged aperture so that a false reading may be discounted. In simplest form Fig. 1 (not shown) two like-sized apertures are used and the two signal channels should produce similar results which are then averaged. If the difference between the two channels is sufficient the read-out circuit is disabled and an alarm given. In the case of three like-sized apertures the readings of pairs of channels are compared, whereby a defective channel is detected. The readings of correctlyoperating channels are averaged and fed to a readout. Three apertures of varied size may be employed and compensation made for these sizes whereby a distribution of particle size is obtained. Narrow bands of sized particle counts from the small and medium, and medium and large apertures are compared, substantial disagreement indicating which channel is faulty and disabling the appropriate read-out, Fig.3 (not shown).
Patent GB-1405030-A (GB)
Title: Gear hobbing machines
IPC: B23C5/26
Filed: 1973-11-12
Abstract: 1405030 Gear hob spindles; spindle mountings MACHINE TOOL DIVISIONAL SERVICES Ltd 6 Nov 1974 [12 Nov 1973] 52331/73 Headings B3K and B3B  In a gear hobbing machine means is provided to permit the removal and replacement of the gear hob without affecting the accuracy of alignment and subsequent rigidity of the hobbing spindle, the means comprising a removable bearing assembly including a housing 7 securable to the machine frame 1, a bearing sleeve 9 mounted in roller bearings 8 within the housing, a part tapered collet member located within the sleeve 9 and which in the operative position is located around the hobbing spindle between the bearing sleeve 9 and the spindle end 30. Radial play of the bearings 8 is taken up by a nut 10 on the bearing sleeve and the collet is urged by its tapered region into gripping relationship with the spindle end 30 by way of the threaded plug 12 and dished springs 14. Coaxial with the bearing sleeve and collet in the end 15 of the housing there is provided a threaded bolt member 16, 17 which can be rotated so as to engage the end of the threaded plug 12 to effect release of the dished spring pressure and hence the release of the collet 11 from the spindle end 30. The bearing assembly is then release from the frame 1 and from the spindle to facilitate the release of the hob 6. The inner end 18 of the bearing housing 7 is provided with a sealing ring 19 which surrounds the spindle end when in operation, and a cover-plate 20 biased by a spring 22 moves along within the collet as the bearing is removed from the spindle to cover the opening in the bearing housing and hence prevents the ingress of dirt.
Patent GB-1411451-A (GB)
Title: Fluoroelastomer composition
IPC: C08K13/02
Filed: 1972-11-13
Abstract: 1411451 Fluoroelastomer compositions DAIKIN KOGYO CO Ltd 13 Nov 1972 [11 Nov 1971 25 July 1972] 52394/72 Heading C3P A fluoroelastomer composition comprises (a) a fluoroelastomer, i.e. a fluorinated elastic copolymer containing at least 50% by weight of fluorine, (b) at least one member selected from a bivalent metal oxide, a bivalent metal hydroxide and a mixture of a bivalent metal oxide and/or metal hydroxide with a metal salt of an acid which is incompletely dissociated in water, (c) an aromatic polyhydroxy compound or an alkali metal or alkaline earth metal salt thereof, and (d) at least one quaternary ammonium compound corresponding to one of the general Formulae (I) to (VI) wherein R 1  is an alkyl group having from 1 to 20 carbon atoms, a carbocyclic group, a heterocyclic group or an aralkyl group having from 7 to 20 carbon atoms; R 2  is hydrogen, an alkyl group having from 1 to 12 carbon atoms, a carbocyclic group, a heterocyclic group, an aralkyl group having from 7 to 12 carbon atoms, an alkoxyl group having from 1 to 12 carbon atoms, a benzyloxy group, a hydroxyl group, a carboxyl group, an alkoxycarbonyl group, an acyl group or a cyclohexylcarbonyl group; R 3  is an alkyl group having from 1 to 20 carbon atoms or an aralkyl group having from 7 to 20 carbon atoms; R 4  and R 5  are hydrogen or a C 1 -C 3  alkyl group; A is an alkylene group or a phenylene group; B is an alkylene group; and X- is an anion. In the examples vinylidene fluoride, hexafluoropropene and tetrafluoroethylene are copolymerized in the presence of water, ammonium persulphate, methyl cellulose, 1,1,2- trichloro - 1,2,2 - trifluoroethane and di- (3,5,6 - trichloro - 2,2,3,4,4,5,6,6 - octafluorohexanoyl)peroxide. The resulting copolymers are compounded with medium thermal carbon, magnesium oxide, calcium hydroxide, hydroquinone, 1,3 - dibenzyl - 2 - methylimidazolium chloride, 1-dodecyl-2-methyl-3-benzylimidazo - lium chloride, water, N,N<SP>1</SP> - di - cinnamylidene- 1,6-hexanediamine, 2-methyl-imidazole, 1- dodecyl - 2 - methylimidazole, 1 - dodecyl - 2- methylimidazole hydrochloride, bisphenol A and the potassium salt of bisphenol A and cured.
Patent GB-1164674-A (GB)
Title: Fluid Inlet Distributor for a Downflow Contacting Vessel
Inventor: BALLARD JOHN HERBERT
IPC: B01J8/02
Filed: 1967-11-20
Abstract: 1,164,674. Inlet flow distributor for reactor. UNION OIL CO. OF CALIFORNIA. 20 Nov., 1967, No. 52757/67. Heading B1F. A liquid inlet distributor mounted in the top vertical nozzle of a downflow contacting vessel comprises flow balancing means positioned within the nozzle to effect the distribution of fluid flowing downwardly therethrough symmetrically about the vertical axis of the nozzle and fluid distributing means positioned within said vessel below said nozzle to receive said symmetrically distributed fluid from said flow balancing means and to disperse said fluid within said vessel in a number of discrete fluid streams of reduced momentum. In the embodiment of Fig. 3, the flow balancing means comprises a covered chimney 4 into which fluid flows through apertures 6 and thus down through aperture 2 to the fluid distributing means which comprises perforated plates 20 and 30. In the embodiment of Fig. 8, the flow balancing means is a symmetrically perforated plate 53 and the fluid distributing means comprises perforated dished plates 70 and 80.