baber/WOPTO huggingface dataset:
Patent GB-703065-A (GB)
Title: Improvements in or relating to the dehydration of hydrazine by azeotropic distillation
IPC: C08G65/08
Filed: 1950-05-31
Abstract: Aqueous solutions of hydrazine containing about 70 per cent hydrazine are dehydrated by distilling the solution with a liquid which forms a water-azeotrope boiling below the hydrazine-water azeotrope. Suitable liquids are aniline, benzene, pyridine, xylene, toluene, n-hexylamine, n-hexylalcohol, phenol and xylidine.  In a laboratory-scale example, an aqueous solution containing 3 per cent. of hydrazine was subjected to simple fractionation until the constant boiling mixture containing 70 per cent. hydrazine, remained in the distilling-flask.  This mixture (100 grm.) was transferred to the three-necked pot shown in Fig. 1, together with aniline (400 grm.); and the charge was distilled and rectified in an atmosphere of nitrogen.  The forerun condensed distillate (38 grm.) which came over until the pot-temperature reached 112 DEG C., separated into two liquid layers in the <PICT:0703065/III/1> <PICT:0703065/III/2> settling chamber from which it was removed from the system.  The upper layer was mainly water, and the lower layer was mainly aniline. The pot-temperature was then raised to 116 DEG C., and a single phase distillate (18 grm.) containing 85 per cent. hydrazine and the balance aniline, was obtained.  The apparatus was cleaned out; and the single phase distillate was charged to the pot and distilled at a pot-temperature of 112-114 DEG C. to give 5 grm, of anhydrous hydrazine, and several cuts containing very high concentrations of hydrazine (greater than 95 per cent.), at higher temperatures. Apparatus for a continuous process is shown in Fig. 2; and this is also charged with nitrogen.  An aqueous solution of hydrazine is preheated, and introduced through line 2 into column 1, from which water is withdrawn overhead and rejected from the system.  A concentrated (approx. 70 per cent.) solution of hydrazine collects in reboiler 6 from which it is transferred through pipe 10 to column 13. This column is charged through pipe 18 with aniline on starting-up the process.  Water and aniline vapours pass from the head of column 13 to condenser 20; and the condensate is passed to separator 21 from which the oily layer, which contains aniline, hydrazine and some water, is returned to the column through line 14, while the aqueous layer is recycled to column 1 via line 24.  The conditions in column 13 are maintained such that the liquid in reboiler 25 is largely aniline, while a side-stream containing 75 to 85 per cent. hydrazine and the balance aniline, is withdrawn through line 26.  The separation of aniline and hydrazine is effected in column 27 from which anhydrous hydrazine is withdrawn overhead.  Aniline is pumped from reboiler 35 to reboiler 25 or to the upper part of column 13.
Patent GB-228418-A (GB)
Title: Improvements in pantograph mechanisms for engraving machines
IPC: B23Q35/20
Filed: 1923-12-06
Abstract: 228,418. Braren, L. K. Dec. 6, 1923. Engraving.-A pantograph engraving machine, adapted for plane surface or plastic reproductions, comprises a parallelogrammatic linkage 1 - - 4 supported by two axes intersecting each other at right-angles, a tool 39 and tracer 13 being carried by the linkage with the tool arranged between the tracer and the supporting axes. A bracket 26 carrying the linkage, a work-table 28, and a pattern-holder 30 are all mounted in a guide 29 provided on a, frame 27. A shaft 37 fixed to the link 1 pivots about screws 17, 18 in a bracket 19 carrying a shaft 38 pivoted about screws 24, 25 in the bracket 26. A screw stop 35 in a slotted arm 32, pivoted at 33 to the bracket 19, and slidable on a stationary bolt 34, limits the depth of cutting. To balance the linkage, the links 1, 3 are extended and carry adjustable counterweights 22, 23. The links 1, 2 are tubular castings and the links 3, 4 of steel tubing, the latter being graduated to facilitate arranging the link 2 which bears marking lines for adjusting a tool-holder 9. For plastic reproductions, a bar 36, fitting with a forked end over shaft 38, serves as a gauge for adjusting the faces of the tool and tracer in line with the axis 24, 25.
Patent GB-388962-A (GB)
Title: Improvements in or relating to screw-drivers
IPC: B25B23/10
Filed: 1932-05-12
Abstract: 388,962. Screwdrivers. CHING, F., 98, Sidwell Street, Exeter, Devon. May 12,1932, No. 13674. [Class 61(iii).] A screw-holding screwdriver comprises a shank 1 tapered at the forward end to form the blade 13 and fitted at the rear end with a handle 3, a sleeve 4 sildably mounted on the shank terminating at the forward end in spring tongues 5 bowed inwards at 6 and bent over at the ends 7 to form claws for holding the screw 15. Sleeve 4 is influenced rearwardly bv a coil spring 14 located between the sleeve 4 and an outer sleeve 9 secured thereto by the operating head 8, the forward end of spring 14 engaging the rear end of a sleeve 10 fitting between sleeves 4, 9 and terminating in a ferrule 11 provided with slots 12 with end shoulders engaging shoulders on the blade 13. The handle end of the shank 1 has flats 17 engaging the correspondingly formed aperture in the head 8 to prevent the latter rotating.
Patent GB-138534-A (GB)
Title: Improvements in and relating to work receptacles for sewing machine benches
IPC: A47B29/00
Filed: 1919-05-31
Abstract: 138,534. McEwen, T. May 31, 1919. Sewing-machines; stands. -A basket or work-receptacle 1 is hooked upon the horizontal bar of a light metal frame 3 pivoted at 6 and 7 upon the bench and the floor. In place of a single receptacle, a frame having two or more pockets can be used. The frame can be turned upon its pivots so as to carry the receptacle under the bench.
Patent GB-167329-A (GB)
Title: Improvements in or relating to droppers for wire fences and means for securing the same
IPC: E04H17/26
Filed: 1920-05-20
Abstract: 167,329. Corrie, J. B. May 20, 1920. Droppers; wire fencing, securing to droppers.- Sheet metal U or V-shaped droppers for wire fencing are constructed with plain front edges and are corrugated transversely or indented throughout the whole or part of the length for the reception of fence wires, which are secured in position by metal clips fixed by means of a special tool. In the form shown in Figs. 7 and 8, indentations 2 are produced by the formation of projections 2<a> and the fence wires are secured by clips formed of channel-shaped wires 5 having hooked ends 5<a> which are bent over the fence wires 4. A device for securing the wires in position comprises a lever 6, Figs. 9 and 10, having secured in its lower end a bar 7 provided with hooked ends 7<b>. In operation the fence wire is placed in one of the indentations, and the hooked ends 7b of the bar 7 are placed over the wire which is forced into the position shown in Fig. 8 by means of the lever 6, and secured therein by the clip. In a modification of the dropper, the transverse grooves are replaced by smaller indentations, and the securing-clips are formed in two parts which are twisted together or secured by a right and left-handed screwed sleeve.
Patent GB-599430-A (GB)
Title: Selenium rectifier
IPC: H01L21/105
Filed: 1944-07-21
Abstract: 599,430. Asymmetrically-conducting resistances. STANDARD TELEPHONES & CABLES, Ltd. July 21, 1944, No. 14014. Convention date, July 16, 1943. [Class 37] The selenium layer of a rectifier element is treated with sulphur trioxide, with or without water vapour, e.g. by exposure to the fumes present above hot concentrated sulphuric acid, to improve the rectifying characteristics. The concentration of the acid should be at least 95 per cent, commercial fuming sulphuric acid heated to 200‹ C. or over being suitable, and the time of exposure should be between 5 and 30 seconds. Nascent selenium and selenium dioxide are stated to be formed on the surface of the selenium layer. A counter-electrode is applied to the fumed surface and the element electroformed.
Patent GB-543844-A (GB)
Title: Improvements in vibration damping devices of the flywheel type
IPC: F16F15/16
Filed: 1940-09-10
Abstract: 543,844. Torsional-vibration dampers. ELECTRICAL RESEARCH PRODUCTS, Inc. Sept. 10, 1940, No. 14045. Convention date, Sept. 14, 1939. [Class 108 (iii)] [Also in Groups XXVI and XXXVIII] A device of the flywheel type for damping vibrations of a rotating shaft, such as the driven shaft 2 of a sound film recording or reproducing apparatus, comprises a rotating drum 5 mounted on the shaft and having a hollow annular peripheral portion 6 containing a liquid, such as mercury, of high density and low viscosity, and one or more internal baffles 18 each built up of a series of spaced rectangular plates 19 the apertures between which lie in the direction of the peripheral flow of liquid in the drum, and the size of the apertures being so related to the density and viscosity of the liquid that at the resonant frequency of the system the impedance is mainly due to the frictional resistance to the flow of liquid through the baffles, whilst the volume of the liquid is such that its moment of inertia is substantially greater than the moment of inertia of the container, the object being to suppresoscillations having small frequency and small amplis tude in addition to those having small frequency and large amplitude and those having large frequency. Formulae are given in the Specification for selecting the distance that the baffle plates should be spaced apart in accordance wtih the density and viscosity of the liquid, and for determining the resistance of the baffle to the flow of liquid therethrough. In the apparatus shown in Figs. 1 and 2 the travel of the film F is controlled by a driving sprocket 7 and feed take-up sprocket 8, the film being guided by guiderollers 9 .. 12 and passing over a driven roller 4, between which and the film slip is prevented by a pressure roller 13. The roller 4 is mounted on one end of the shaft 2, which is supported in ball bearings 3 and carries at its other end the liquidcontaining drum 5. In this construction the plates 19 are spaced apart radially and are arranged in two separated groups, while in a modification, Fig. 7, the plates 19 are spaced apart in a direction parallel to the axis of the drum. The Specification as open to inspection under Sect. 91 also describes a modification in which each baffle is formed of a radially disposed plate having a number of orifices or short tubes arranged therein. This subject-matter does not appear in the Specification as accepted.
Patent GB-758217-A (GB)
Title: Improvements in or relating to a method of manufacturing a circular glass lense secured in a frame
IPC: G02B7/02
Filed: 1954-05-13
Abstract: 758,217. Radiation detectors. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 13, 1954 [May 16, 1953], No. 14051/54. Class 40 (3). [Also in Groups XI, XX and XXXVI] A photo-diode or photo-transistor consists of a semi-conducting crystal 20 situated at the focus of a lens 25 formed by introducing a quantity of molten glass into a circular support 24 having a melting-point exceeding that of the glass, and cooling whilst rotating it about the optical axis of the lens to be obtained.
Patent GB-317511-A (GB)
Title: Improvements in type actions for typewriting machines
IPC: B41J7/02
Filed: 1928-05-14
Abstract: 317,511. Alexander, F. May 14, 1928. Type-lever actions.-The key-lever 1 is connected by a link 7<1> to a lever 9 pivotally connected to a lever or bell-crank 12 having a pin 14 engaging a slot 15 in the heel of the type-lever 4. The levers 9, 12 may have open slots engaging pivot rods 10, 13. To permit detachment of the type-lever it is formed with an open slot for engaging a pivot rod 5, and the slot 15 is formed with an opening 16. Specification 315,044 is referred to.
Patent GB-551900-A (GB)
Title: Improvements in and relating to shock absorbers
IPC: F16F7/06
Filed: 1941-11-03
Abstract: 551,900. Trichional shock absorber. SHACKLETON, H., and POCHIN, A. D. Nov. 3, 1941, No. 14171. [Class 108 (iii) The upward and downward movements of the axle relatively to the frame 3, Fig. 1, of a vehicle are braked unequally by a band 9 encircling a drum 13, and connected to a differential lever 10, the mechanism being enclosed in a casing, secured to the frame and the drum connected to the operating arm 6. A spring 14 applies the minimum tension to the band. Two oppositely acting bands side by side on the drum may be used. The operation of the brake may be modified in accordance with the range of movement by an arm 23, Fig. 5, connected to lever 10 and engaging a cam 22 movable with the drum. In a further modification a similar arm is operated by a mass so as to give inertia control. The spring controlling the differential lever may be limited by spaced stops against movement in either direction- The adjustment may be controlled from a distance-
Patent GB-853000-A (GB)
Title: Improvements in or relating to marine life-saving equipment
Inventor: THOMSON WILLIAM GILBERT
IPC: B63C9/22
Filed: 1958-05-03
Abstract: 853,000. Boat handling apparatus. DAVIT DEVELOPMENTS Ltd. July 24, 1959 [May 3, 1958], No. 14180/58. Class 115. A boat handling and launching device comprises a platform 2 which supports a deflated life-raft 1 and has hingedly connected arms 3 which are adapted to extend outwardly from the platform during launching operations under the pull exerted by the harness 7A and together with the webbing straps 17 support the life-raft which has been simultaneously inflated. The device is stowed as indicated by full lines in Fig. 1. The harness 7A is joined at 8 to a raising and lowering means on the parent ship 20 and may be suspended from two or more cables. Fenders are secured to the outermost ends of the arms 3 and the device may be locked in the extended form and be fitted with springs to assist its extension. A pivotally mounted boom may be provided to enable the raft to be manually propelled away from the platform. The device may be extended manually or automatically on board the parent ship, the life-raft inflated and passengers embarked and it may accommodate more than one life-raft or life-raft pack. The device amy be fitted with collapsible handrails to assist embarkation of passengers. Further embodiments comprise a plurality of sections hinged together and folded in the stowed condition with the harness connected to the extremities of the sections. A remote control line controls a release device which allows the sections to unfold to form a platform.
Patent GB-977316-A (GB)
Title: Improvements in polymers
IPC: C07F7/00
Filed: 1961-04-20
Abstract: A process for the production of foamed polyurethanes having improved stability and resistance to heat deterioration comprises reacting an isocyanate with an organic compound containing more than one hydroxyl group and water or a blowing agent in the presence of stannous octoate as catalyst.  Suitable hydroxyl containing compounds are glycol, diethylene glycol, hexamethylene glycol, glycerol, 1, 2, 6-hexanetriol, and sorbitol, polyoxyalkylene polyols obtained by the reaction of alkylene oxides with glycol, propylene glycol, 2-ethylhexanediol-1, 3, glycerol, trimethylolpropane, 1, 2, 6-hexanetriol, tetrols, hexols, carbohydrates glucose, sucrose and polyhydroxy fatty acids such as castor oil; and polyoxyalkylene glycols, including block copolymers. Polyisocyanates listed include compounds containing divalent groups, for example, -O-, -O-R-O, -CO-, -CO2-, -S-, -S-R-S- and -SO2-, polymeric diisocyanates, phosphonic and phosphonous diisocyanates, compounds containing -Si-NCO, Si-NCS, isocyanates derived from sulphonamides, cyanic acid or thiocyanic acid and compounds containing a metal, e.g. tributyltin isocyanate. In example (2) a foam is prepared from polyoxypropylene glycol (M.W. 2000), water, siloxane-oxyalkylene copolymer emulsifier, triethylene diamine, tolylene diisocyanate and stannous octoate.  In other examples the polyols used are propylene oxide addition products of (3) sucrose, (4) methyl glucoside and (5) sorbitol. Trichloromonofluoromethane is used as blowing agent in example (4).
Patent GB-451980-A (GB)
Title: Improvements in or relating to television receivers
IPC: H04N5/64
Filed: 1935-05-15
Abstract: 451,980. Television receivers. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and JESTY, L. C., c/o General Electric Co., Ltd., Wembley, Middlesex. May 15, 1935, No. 14235. [Class 40 (iii)] A television receiving-apparatus comprises a cathode-ray tube contained in a suitable housing of light weight but otherwise connected to the remainder of the apparatus solely by flexible leads. The housing is provided with a part adapted to fit over or to be placed near the eye or eyes of an observer, and similar to the eye-piece of a hand-telescope or the eye-pieces of a binocular. Optical devices are provided whereby the image is magnified and the images seen by the two eyes appear to coincide. In a system arranged for stereoscopic television, the housing preferably contains two cathode-ray tubes, one viewed by each eye. The receiving apparatus may incorporate head-phones separate from the housing for the cathode-ray tube.
Patent GB-901646-A (GB)
Title: Graft polymers and compositions containing the same
IPC: C08F279/04
Filed: 1959-04-27
Abstract: Graft polymers are obtained by first preparing an aqueous dispersion of a rubbery polymer of a conjugated 1,3-diene having a second order transition temperature not higher than 0 DEG C. and having combined therein at least 85% by weight of butadiene or isoprene or a mixture thereof and containing not more than 1,5% by weight of a cross-linking monomer containing a plurality of non-conjugated vinylidene groups, and dispersing and polymerizing therein 15 to 90 parts by weight per 100 parts of rubbery polymer of a monomer mixture consisting of 60 to 85% by weight of a mono-vinylidene aromatic hydrocarbon or nucler halo-hydrocarbon or a mixture thereof and 40 to 15% by weight of acrylonitrile, methacrylonitrile or mixture thereof, the polymerization being carried out in the substantial absence of emulsifying agents other than those present during the production of the rubbery polymer. The rubbery polymer may be a homopolymer of the dienes or copolymers thereof with up to 15% of monomers such as styrene, o-, m- and p-vinyl toluenes, alpha-methyl styrene, methyl, ethyl, butyl and octyl acrylates and methacrylates, acrylonitrile and methacrylonitrile.  The rubber polymer may also include up to 1,5% of a cross-linking monomer such as divinyl benzene and diallyl phthalate and maleate.  The monovinylidene aromatic compound employed in the preparation of the graft polymer may be styrene, o-, m- and p-methyl- and chlorostyrenes, 2,4-dimethyl- and 2,4-dichloro-styrenes, 2-methyl-4-chlorostyrene, p-ethylstyrene and alpha-methylstyrene. The resulting graft polymers are used for blending with rigid interpolymers of 60 to 85% by weight of a monovinylidene aromatic hydrocarbon or nuclear halo-hydrocarbon or a mixture thereof and 40 to 15% by weight of acrylonitrile, methacrylonitrile or a mixture thereof, e.g. styreneacrylonitrile and styrene-alpha-methylstyrene-acrylonitrile interpolymers, the polymers being present in such proportions that the rubbery polymer employed in the production of the graft polymer forms 5 to 40% by weight of the mixture.  The graft polymers may also be used as stiffening and reinforcing agents in rubber stocks, in the manufacture of glass fibre reinforced laminates and as additives to polyvinyl chloride.
Patent GB-115576-A (GB)
Title: Improvements in Pistons.
Inventor: PULLIN CYRILL GEORGE
IPC: F16J1/18
Filed: 1917-05-17
Abstract: 115,576. Pullin, C. G. May 17, 1917. Channels and reservoirs in pistons.-Passages j, Fig 2, in the gudgeon-pin bosses of a piston lead from an oil - collecting groove h to holes P, Fig. 3, in the hollow gudgeon-pin L. The connecting-rod small end is lubricated from the interior of the gudgeon-pin by holes O. Specification 114,518, [Class 122 (i), Engine and like cylinders &c.], is referred to.
Patent GB-139968-A (GB)
Title: Rectifying machines for shells
IPC: B23B41/12
Filed: 1919-06-05
Abstract: 139,968. Sumbling, W. H. June 5, 1919. Projectiles.-A device for trueing the internal bottoms of shells before boring consists of a baseplate A with two brackets B, C, the former B supporting one end of a boring-bar D and a screw feed-device therefor, and the other C supporting one end of a sleeve G which, at its other end forms a bearing for the other end of the boring-bar. A rounded head 22 on this sleeve is adapted to abut against the internal conical bore of the shell, which is further secured and centred by a pivoted clamp 13, 14 with jaws f and a pivoted locating-stop 23. A thrust ball bearing g may be inserted between the feed-nut and a shoulder on the bar. The bar is rotated through a long pinion d.
Patent GB-276101-A (GB)
Title: Spinning machine
IPC: D01H4/00
Filed: 1926-06-07
Abstract: 276,101. Edelmann, B. O. June 7, 1926. Spinning-machines; spindle apparatus; twist tubes and like twisters; spindle-driving apparatus; moistening.-In spinning- machines wherein fibres are sucked by a funnel on to a spirally grooved cone terminating in a point leading to the mouth of the funnel, the cone 9 is driven by friction discs 6, which are mounted on screwed shafts 2, Fig. 1 so that they are forced thereby against a friction cone 7, the shafts 2 being coupled by a chain 5 and driven by an electromotor through one to five gearing. The funnel 10 is supplied with compressed air or steam through a pipe 19 and communicates through a wire gauze wall with a chamber 14 connected by a pipe 15 and valve 18 to an exhauster 16 mounted on one of the shafts 2. Fibres from drawing-rollers 21 are sucked in through a funnel 20 and drawn down the grooves of the cone 9 to the pointed end 12 and thereby spun and are then delivered to the roller 22. The funnel may be axially adjustable to vary the space between it and the cone. When starting, a wire is inserted in the mouth of the funnel to collect the fibres and the yarn initially formed thereon is drawn out. The steam is preferably impregnated with 0.1 to 1 per cent of mucilage, for instance that obtained from St. John's bread If the machine is to be used for spinning around a core the cone 9 is provided with an axial hole for its passage.
Patent GB-1044675-A (GB)
Title: Method of and apparatus for reproducing sounds optically recorded on films
IPC: G11B7/00
Filed: 1963-04-10
Abstract: 1,044,675. Playing back small optical soundtracks. N. SHIRAHASE. April 10, 1963 [April 23, 1962], No. 14379/63. Heading G5R. To obtain comparable frequency response from an optical sound-track on 8 mm. (or 16 mm.) film, where the speed is some 20% (or 40%) of that normal with 35 mm. film, it is not normally practical to scale down the slit to suit. Accordingly, light 1 is condensed at Z on to the sound-track of film 3<1> and the emergent beam magnified some 5 times (2¢ for 16 mm.) before analysis by a slit 5 whose operative length is at least 0À025 mm. (as standardized for 35 mm.) for transmission to a photo-cell or photo-transistor 6.