baber/WOPTO huggingface dataset:
Patent GB-1317713-A (GB)
Title: Infra red scanning system
IPC: H04N5/33
Filed: 1971-01-19
Abstract: 1317713 Infrared scanning system DYNARAD Inc 19 Jan 1971 [22 Jan 1970] 2507/71 Heading H4F An infra-red scanning system comprises a dichroic beam splitting element 42 which directs visual energy to a visual channel and infra-red energy to an infra-red channel, the visual channel comprising lenses for viewing the same field of view as the infra-red channel which comprises low inertia scanning mirrors 46, 52, scanning the field of view, lenses 60 to focus the infra-red energy on to an infra-red detector 62 in a dewar 64 to provide a corresponding electrical output signal which is fed to a display unit 12. Where the system is for use at close focal distances a lens system is provided after the beam splitting element. The display can be in a continuous range of greys or in a range of discrete greys according to selected temperature bands. In the latter case means are provided for selecting two isotherm bands, which signals may be stroked prior to their application to the display tube. Compensating means provided to compensate for the variation in the tube writing rate caused by the sinusoidal motion of the scanners to produce uniform intensity scanning of the tube, comprises units for squaring each of the synchronization signals from the scanning system, and units for summing the squared synchronization signals with the said output signal to provide a correction signal. Maximum temperature can be displayed as maximum white or maximum black. In an alternative embodiment, Fig. 5, not shown, one of the oscillatory scanning mirrors also serves as the beam splitting element for separating visual and infra-red energies. Single line scanning systems are described. Figs. 6 and 8, (not shown), where only one scanning mirror is employed. In a further embodiment, Fig. 9, (not shown), a television type scanned visual display is provided in synchronism with the scanned thermal image, remote visual viewing being provided by applying the visual energy to a vidicon or other image tube and thence via amplifiers to a cathode ray tube display. Deflection signals to the vidicon are synchronized with the infra-red scanning mirrors. Both infra-red and visual displays may be presented on the same display tubes. The invention is also described as applied to an infrared scanning microscope, Figs. 10, 11, 12 (not shown).
Patent GB-584881-A (GB)
Title: Improvements in or relating to methods of making synthetic fibers
IPC: D01D5/08
Filed: 1945-02-01
Abstract: <PICT:0584881/IV/1> In a process for the production of synthetic fibres of thermoplastic material, a solid piece of thermoplastic material 1 in the form of a bar or a plate held in the holder 4 is brought into contact with a heater 2, having a resistance element 3, so that a film of molten material 6 is deposited on the heater 2. The heater 2 and the block 1 are separated, thus subjecting the film to a pulling action, which leads to the formation of a number of fibres 7. The separation may be such that the fibres are drawn out to the length desired.  Alternatively, the separation may be such as to initiate formation of the fibres which are then drawn out to the desired length by a further pulling action in any convenient direction, followed by removal of the fibres from the solid piece of material.  Either the member 2 or the holder 4 may be reciprocable by a suitable mechanism providing a feeding movement of the holder 4 to compensate for the decrease in size of the block 1.  Thermoplastic compounds mentioned are: cellulose esters, e.g. cellulose acetate or cellulose acetate butyrate, cellulose ethers, e.g. ethyl cellulose, vinyl polymers, e.g. vinyl chloride or acetate and vinylidene chloride, polyamides and polyacrylic compounds, e.g. methyl methacrylate.  The surface of the heater is such that it is wetted by the thermoplastic material, e.g. copper.
Patent GB-418655-A (GB)
Title: Improvements in and relating to methods of manufacturing insulating materials
IPC: C08B3/00
Filed: 1933-01-26
Abstract: Insulating material for electric wires and conductors comprises a non-saponified cellulose tri-ester containing a predominant amount of radicals of acetic acid and only up to "\ba1/10\be gramme-molecules" of radicals of other organic or inorganic acids.  The introduction of these radicals is effected with the aid of inorganic acids such as nitric acid, or organic acids, acid halides, acid anhydrides, acid amides, or acid esters.  The material is more water-proof, and resistant to electric discharges than acetone-soluble cellulose acetate.  A copper conductor may be wound with film strips of the cellulose tri-ester and then heated to remove any residual solvent such as chloroform.  The conductor is then treated in a vacuum with a softening agent such as amyl acetate.  It is again heated in a vacuum to expel air from the coating and while the latter is in a swollen condition it may be lead covered.  A cellulose acetate-nitrate containing 0,1 per cent of nitrogen is obtained by heating cellulose with acetic acid, acetic anhydride and a small quantity of nitric acid.  Films for insulation purposes are made from chloroform solutions of the ester.  Cellulose acetate-butyrate containing 0,5 per cent of butyric acid is obtained by mixing cellulose with acetic acid and a little sulphuric acid and then adding acetic anhydride and a small quantity of butyryl chloride.  In another example, cellulose is mixed with acetic acid containing a little sulphuric acid and then with acetic anhydride containing stearic acid.  The cellulose acetatestearate containing 2 per cent of stearic acid is purified with ether and dissolved in chloroform from which solution clear, flexible films suitable for electric insulation purposes are obtained.
Patent GB-979561-A (GB)
Title: Polyurethane compositions
IPC: C08L75/08
Filed: 1963-01-22
Abstract: A cured polyurethane composition suitable for the wearing surface of a shoe resulting from (1) an ethylene/propylene copolyether glycol containing less than 10 mol per cent. of ethylene ether group and having a MW of 800-1600, (2) diphenyl methane 4,41 diisocyanate and/or one or more tolylene diisocyanates, (3) a chlorinated aromatic diamine, (4) wood flour and/or nut shell flour; the diamine to excess diisocyanate mol ratio being from 0.5 to 1.0, the diisocyanate being present in 1.7 to 2.5 mols per mol of polypropylene ether glycol, and the flour being present in amount from 60 to 100 parts by weight per 100 parts of the polypropylene ether glycol and being characterized by the ability to form a permable mixture when mixed with the polypropylene ether glycol in the recited amounts. The diamine may be: methylene bis-chloroaniline, ortho dichlorobenzidine, isopropylidene bis orthochloroaniline and 50/50 mixtures thereof with 4,41 diamino diphenyl sulfone. Fillers may be: cellulosic powders or ground nut shells e.g. walnuts, pecan, cashew, peanut and various woods e.g. pine, spruce or fir with oak, maple walnut or elm. The cellulosic flour is preferably ground to 100 mesh. Other fillers e.g. ground pumice stone or talc may be added. The ether glycol is dehydrated under vacuum, magnesium oxide added, and a propolymer formed with the diisocyanate. The cellulosic flour is then added with the cross-linking agents, mixed, cast into molds and cured. Soles and heels of shoes may be prepared.ALSO:Soles and heels for shoes are made from a cured polyurethane composition derived from (1) an ethylene/propylene copolyether glycol of low unstaturation containing less than 10 mol. per cent of ethylene ether groups and having a M.W. of 800 of 1600 (2) diphenyl methane 44/ha1/h3 diisocyanate and/or one or more tolylene diisocyanates (3) a chlorinated aromatic diamine (4) wood flour and/or nut shell flour; the diamine to excess diisocyanate mol ratio being from 0.5 to 1.0, the diisocyanate being present in 1.7 to 2.5 mols per mol of polyether glycol and the flour being present in an amount from 60 to 100 parts per 100 parts of polyether glycol and being characterized by the ability to form a pourable mixture when mixed with the copolyethere glycol in the recited amounts.  Fillers may be cellulosic powders or ground nut shells, e.g. wallnut, pecan, cashew, peanut or various wood flours, e.g. pine, spruce, fir, oak, maplee, walnut or elm.  Other fillers, e.g. ground pumice stone or talc, may be added.
Patent GB-573818-A (GB)
Title: Improvements in control equipment for variable speed electric motors and hoisting machinery driven thereby
IPC: H02P1/20
Filed: 1943-02-18
Abstract: 573,818. Controllers for D.C. motors. BROWN, H. B., SAYER, C. M., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd Feb. 18, 1943, No. 2736. [Class 38 (iii)] A controller for a reversible winch motor such as disclosed in Specification 573,816, [Group XXXV], comprises a bar OB, Fig. 2, slidable either way, so that cams thereon close in succession switches 1st H, 2nd Hand 3rd H; or 1st L and 2nd L ; a switch OP being closed in the " off " position of the bar. The motor MA has a series field SF wound for the lifting direction and a shunt field SHF wound for the lowering direction. A no-volt and brake release coil B is energised in the " off " position of the controller and by closing contacts b energises a coil BHC which permits a mechanical brake to be operated. When switches 1st H. 2nd H and 3rd H are closed resistors R1, R2, R3 are cut out, and motor accelerates upwards with the series field overpowering the shunt field. When switches 1st L and 2nd L are closed, switch s is closed and then resistors R1, R2 are cut out, and the motor accelerates downwards with only the shunt field energised. The overload coils OC1 and OC2 aid each other and the coil OC2 is cut out when resistor R1 is cut out. The Provisional Specification refers to Specification 573,817.
Patent GB-765686-A (GB)
Title: Improvements in and relating to shrouds for the protection of connections between electrical conductors
Inventor: SIMMONDS HENRY
IPC: H02G5/00
Filed: 1954-01-29
Abstract: 765,686. Distribution boxes. ENGLISH ELECTRIC CO., Ltd. Jan. 28, 1955 [Jan. 29, 1954], No. 2742/54. Class 38(1). In order to protect the connections between bus-bars 1, 2 and conductors 6, 7 a box 5 is assembled by first drilling holes for the conductors in thin insulating panels 9a-9d, joining the conductors, and then sliding grooved insulating parts 8a, 8b over the panels and securing the parts by bolts 10. In another embodiment (Fig. 3) for shrouding the connection between a terminal 13 and a cable 12, member 8b is replaced by a panel 11 similar to the panels 9 and a fuse 15 and carrier 16 are provided, a split-pin 17 forming one fuse connection entering a hole in terminal 13 when the box is assembled, and the other connection being formed by a. terminal 18.
Patent GB-1519933-A (GB)
Title: Digital phase comparison apparatus
IPC: H03L7/091
Filed: 1977-01-24
Abstract: 1519933 Phase comparators PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 24 Jan 1977 02743/77 Heading H3A A phase comparison apparatus suitable for use in a phase lock loop and having a wide operational range to speed lock-in reduces the level of noise components at its output by selectively connecting to the output 97, the output of a first phase comparator 13-26 with a narrow operational range or the output of a wider range second phase comparator (included in 31) when operating outside the range of the first comparator and obtains smooth transition between the outputs and an overall linear characteristic over the wider range by combining at 96 the second comparator output with a first or second constant voltage level V +, V - depending on phase (or frequency) lead or lag. The first phase comparator 13-26 operates by converting an input at 11 into a trapezoidal wave and by sampling it at 16 at its rising or falling edges by a narrow pulse derived at 23 from the corresponding leading or falling edge in the second signal at 21 and storing the sampled voltage at 20. In an alternative embodiment (Fig. 8, not shown), the stored voltage is further sampled to remove A.C. ripple. The second phase comparator (Fig. 13, not shown) may be a conventional bistable, logic gate arrangement producing pulses of duration related to the phase difference. A level detector 36 detects the end of the leading edge of the output of 13 i.e. a limit of the operational range of the first comparator.
Patent GB-485888-A (GB)
Title: Improvements in charging apparatus for carbonising plant
IPC: C10B31/04
Filed: 1937-01-30
Abstract: 485,888. Bearings. WOODALLDUCKHAM (1920), Ltd., and McEWAN, M. H. Jan. 30, 1937, No. 2819. [Class 12 (i)] [Also in Group XII] In a coke-oven charging-car carrying one or more hoppers 12 each pivoted on a horizontal axis, the bearings comprise trunnions 29 fitted with hardened steel sleeves 30 and supported in boxes 31, the latter having vertically adjustable bases 32 carrying hardened steel plates 33 on which the trunnions rotate.
Patent GB-683450-A (GB)
Title: Ethyl cellulose composition containing di-tertiary-octyl di-phenyloxide
Inventor: KROPSCOTT EARLE LEVI
IPC: C08K5/06
Filed: 1951-02-08
Abstract: A composition suitable for moulding, extruding, or coating operations, comprises ethyl cellulose of at least 45 per cent ethoxyl content and 2-30 per cent of its combined weight therewith of di-tertiaryoctyl diphenyloxide having a boiling range of 210-215 DEG C. at 3 mm. of mercury, absolute pressure.  The di-tertiary-octyl diphenyloxide may be obtained by condensing di-isobutylene with diphenyloxide and fractionally distilling the resulting product.  In examples, ethyl cellulose of 46-47.5 per cent ethoxyl content and of viscosity 75-100 centipoises (determined on a 5 per cent solution thereof, by weight, in a 70 : 30 mixture of toluene and ethanol, by volume) is mixed with di-tertiary-octyl diphenyloxide, in a proportion of 5-16 per cent of the composition by weight, and a small proportion of pigment. A pentaerythritol ester of rosin may be present as an additional plasticizer.  The composition may be used for making articles by compression moulding, injection moulding, or extrusion.  Solvents may be added to the composition to form solutions suitable as lacquers or other coating compositions or for making films.  The composition has good dielectric properties, low water-absorption, good flexibility, and high impact strength even at low temperatures, e.g. -18 DEG  C.  The di-tertiary-octyl diphenyloxide plasticizer is stated to be unsuitable for use with cellulose acetate and other specified cellulose derivatives or with polyvinyl chloride or other specified synthetic resins.ALSO:Di-tertiary-octyl diphenyloxide is obtained by condensing di-isobutylene with diphenyloxide in the presence of a Friedel-Crafts catalyst such as aluminium chloride, and fractionally distilling the product, the fraction boiling at 210-215 DEG  C. at 3 millimetres of mercury, absolute pressure, being collected.  The compound, or mixture of isomeric compounds, obtained has a density of 0.944-0.952 at 20-25 DEG  C., a refractive index, referred to the D line of sodium, of 1.525 at 25 DEG  C., and a viscosity of 5000 to 7000 centistokes at 25 DEG  C. and 40 centistokes at 80 DEG  C.  It is obtained as a colourless or slightly yellow liquid.  It may be used as a plasticizer for ethyl cellulose (see Group IV (a)).
Patent GB-948549-A (GB)
Title: Improvements in and relating to polymeric anti-oxidants
IPC: C08L21/00
Filed: 1962-01-26
Abstract: A polymeric antioxidant is prepared by reacting a polymer of at least 50% of conjugated diene hydrocarbon-the polymer having less than 50% of the diene units in 1,4 configuation-with an aromatic hydroxyl compound having at least one hydroxyl group attached to a carbon atom in an aromatic nucleus.  Specified dienes are butadiene and 2-methyl butadienes, 2-3-dimethyl and diethyl butadienes and 2-ethyl-butadiene together with their copolymers with styrene, alpha-methyl styrene, vinyl toluene, the vinyl xylenes, divinyl benzenes, trivinyl benzenes acrylonitrile, methacrylonitrile, vinylidene cyanide, vinyl formate, acetate, propionate, laurate, and benzoate, isopropenyl acetate, methyl ethyl, butyl and dodecyl acrylate and methacrylate, 2-ethyl hexylmethacrylate and decylmethacrylate.  Specified hydroxyl compounds are phenol p-nonyl phenol, the cresols, 6-t-butyl-o-cresol, 2,4-dimethyl phenol 3-4-dimethyl phenol, catechal, 5-6-7-8-tetra-hydro-beta-naphthol and 2-6-dimethyl- 4-t-butyl phenol. The reaction may take place at a temperature of 50 to 200 DEG C. using an acid catalyst such as an alkane sulphonic acid, a halide of boron or aluminium or an aluminium salt of a phenolic compound in the presence of a solvent which may be an excess of the aromatic hydroxy compound.  The antioxidants may be used with any polymeric material including natural rubber, conjugated diene polymers and copolymers both rubbery and non-rubbery polymers, polysulphide rubbers, rubbery polyesterurethanes and polyetherurethanes and copolymers of acrylic acid esters, of vinyl halides and vinyldene halides and polymers of ethylene, propylene and butene-1.
Patent GB-647553-A (GB)
Title: Improvements in quick-action springs for electrical switching devices
Inventor: STRAFFORD FREDERICK RICHMOND W
IPC: H01H37/60
Filed: 1948-02-03
Abstract: 647,553. Thermal switches; snap-action switches. BELLING & LEE, Ltd. Feb. 3, 1948, No. 3177. [Class 38(v)] [Also in Group XXXII] A snap-acting spring strip 5 for use in a switch requiring a low operating differential, has a stamped-out contact-carrying tongue 6 and a side 11 formed with a depression 12 on the inner edge, whereby that edge is given a greater length than the corresponding outer edge and the strip tends to curve concave upwardly. One end 8 of the strip is fixed and the other end 7 engaged by a bimetal strip 24 adjustably mounted on a spring 25. On increase of temperature the strip 24 deflects downwards and inverts the curvature of the depression 12 and the contact-carrying end 13 of the tongue 6 leaves the fixed contact 2.3. A slight decrease in temperature suffices for the bimetal to bend upwardly and permit the strip 5 to revert to its original shape.
Patent GB-524506-A (GB)
Title: Improvements in vacuum cut-offs
IPC: H01J9/385
Filed: 1939-01-31
Abstract: 524,506. Valves. GENERAL ELECTRIC CO., Ltd., and DONALDSON, D. H. Jan. 31, 1939, No. 3251. [Class 135] A dual-closure device comprising a bell 7 adapted to dip into mercury or other liquid in an annular trough 2 said bell carrying a lift-valve closure 9 adapted to co-operate with a seat on the inner periphery 4 of the annular trough has this closure member formed of a ball such as is used for bearings. The device is housed in a vessel 1 and is actuated by an armature acting through a wire 11 passing over the lower surface of a bend connecting the main part of the vessel to the vertical tube 12 in which the armature hangs. The armature is raised or lowered by a magnet outside the tube. Specification 17926/13, [Class 135], is referred to. Reference has been directed by the Comptroller to Specification 17926/13, [Class 135].
Patent GB-1138652-A (GB)
Title: Improvements in or relating to spring clutches
IPC: F16D41/20
Filed: 1966-01-25
Abstract: 1,138,652. Friction clutches. CURTISSWRIGHT CORP. 25 Jan., 1966 [28 Jan., 1965], No. 3260/66. Heading F2C. An overrunning coil-spring clutch, with or without manual disengaging means, comprises a coil-spring 20 tightly embracing a cylindrical output member 14, one end (left) of the coil abutting tangentially against a projection (22) on the output member, whilst its other end (right) is expanded into frictional engagement with a spaced concentric cylindrical input member 10 by actuating means carried by the input member 10 and comprising in Fig. 1, an axially slidable key 24, engaging the coilspring end, and mounted on a resilient split washer 28, fast at one end to the input member 10 and yielding axially to permit the coilspring end to cam the key 24 axially to an idle position when the output overruns the input. In addition, the key 24 can be retracted manually, for clutch disengagement at any time, by a collar 36 slidable on the input member 10. In non-controllable forms, Figs. 4 to 6 (not shown), the key 24 is replaced by a splitspring washer, one end of which abuts tangentially on the end of the coil-spring; and in Fig. 7 (not shown), by a key fixed on the input member, the coils of the spring being axially spaced to permit the coil-spring itself to yield axially on overrun. The spring coils may taper axially in width from the anchored end towards the actuated end.
Patent GB-633243-A (GB)
Title: Means for supplying electrical power to a movable electrically-operated apparatus
IPC: H02G5/04
Filed: 1948-02-05
Abstract: 633,243. Collectors. HOLLANDER, J. M. Feb. 5, 1948, No. 3346. [Class 38 (i)] In a system for supplying electrical power to movable apparatus wherein a wander lead from the apparatus passes through a longitudinal slot 19 in a support to spring contacts 22a, 23a, 24a on a collector shoe 33, the support comprising two U-shaped members 11, 12, arranged facing each other and the member 11 carrying conductive rails 22, 23, 24 on insulating blocks 25 with which the spring contacts on the shoe coact, an insulating strip 46 is placed between the rail 24 and the slot 19 to mask said rail. The sides 34, 35 of the shoe carry pairs of grooved rollers 29, 30 which run on the rolled edges 28 of an earth plate 27 held captive between the blocks 25 and the member 11, thereby holding the shoe in position. Alternatively the guide rails may be L-shaped and mounted on the blocks 25, flat rollers engaging the faces thereof farthest from the shoe, Fig. 4 (not shown). Further pairs of rollers may engage opposite sides of at least one of the conductive rails to prevent slewing of the shoe in this case. The support may be formed in convenient lengths to facilitate installation. Specification 623,976 is referred to.
Patent GB-327497-A (GB)
Title: Improvements in or relating to motor vehicles
IPC: B60K17/04
Filed: 1929-02-01
Abstract: 327,497. Guy, S. S. Feb. 1, 1929. Transmission gear of invariable ratio; disconnectible gearing; transmission gear between separate axles. - In motor vehicles of the kind having two or more rear wheels driven from the gear-box by means of a transverse shaft c and one or more longitudinal shafts b at each side of the vehicle, the drive from the gear-box to the transverse shaft is transmitted by means of an intermediate shaft. In the construction shown the gear-box shaft d<1> is provided with an extra gear wheel e driving the transverse shaft through an intermediate shaft h. This shaft carries a gear wheel i, driven by the wheel e through an idle wheel l, and a bevel gear j meshing with the bevel gear k on the shaft c. The gear wheel i is slidable on its shaft so as to disconnect the drive when desired.