baber/WOPTO huggingface dataset:
Patent GB-1162224-A (GB)
Title: Preparation of Oxymethylene Copolymers
Inventor: MAY HERBERT
IPC: C08G2/00
Filed: 1966-01-26
Abstract: 1,162,224. Preparing oxymethylene copolymers. BRITISH INDUSTRIAL PLASTICS Ltd. 13 Jan., 1967 [26 Jan., 1966], No. 3483/66. Addition to 1,111,232. Heading C3P. Cyclic oligomers of formaldehyde are copolymerized with other compounds in the presence of as catalysts (1) SbF 5-x R x , where R is chlorine, bromine, alkyl, aryl, alkoxy, or fluorosulphonyl, and is 1 or 2, or (2) a salt containing the anion SbF 6-y A y #, where A is chlorine, bromine, hydroxyl, alkyl, aryl, alkoxy, or fluorosulphonyl, and y is 1, 2 or 3. Specified classes of comonomer are styrene and substituted styrenes, aldehydes, allyl compounds, cyclic esters, unsaturated aliphatic and alicyclic hydrocarbons, vinyl ethers and esters, and N-vinyl and C-vinyl heterocyclic compounds. Specified cyclic oligomers are trioxan and tetroxan. Specified classes of cations in the compounds (2) are the carbonium, carboxonium, oxonium, hydroxonium, and anyl diazonium cations. In the examples, trioxan is copolymerized with styrene (1-3, 7, 8), norbomadiene (5, 6, 9, 10) and betapropiolactone (4), using the following catalysts: triphenylmethyl - pentafluorochloroantiomonate (1, 4, 5, 9, 10), triphenyl methyl pentafluorohydroxyantimonate (3, 6), benzoyl pentafluorochloroantimonate (2), antimony dichlorotrifluoride (7), and triphenyl methyl pentafluorofluorosulphonyl antimonate (8), and using cyclohexane (1-8) and methylene dichloride (9, 10) as solvents.
Patent GB-739181-A (GB)
Title: Process for the production of xanthene carboxylic acid
IPC: C07D311/84
Filed: 1953-02-06
Abstract: Xanthene-9-carboxylic acid is prepared by a process comprising reacting xanthene in an inert organic solvent medium with an aryl- or alkylsodium compound in the nascent state, formed in situ in the solvent medium containing the xanthene from sodium and an aryl or alkyl halide and converting the resulting xanthene-sodium into the corresponding carboxylic acid by treatment with carbon dioxide and decomposition of the resulting sodium salt.  The sodium is preferably employed in excess. Optimum yields of product result when diethyl ether is used as solvent; other solvents are mentioned including phenyl alkyl ethers.  The sodium-xanthene may be converted to the corresponding acid compound by direct addition of solid carbon dioxide.  In a typical example, finely cut sodium is added to an ethereal solution of xanthene, chlorbenzene is then added and the mixture allowed to reflux under a nitrogen atmosphere with shaking; solid carbon dioxide is added to the product and thereafter the catalyst is destroyed with methanol and the xanthene-carboxylic acid sodium salt produced recovered by extraction with water. Acidification yields the free acid.
Patent GB-690647-A (GB)
Title: Combined frying pan cover and colander
IPC: A47J37/10
Filed: 1951-02-13
Abstract: 690,647. Colanders. PESENTI, J. Feb. 13, 1951, No. 3510/51. Class 66 An. inverted colander with a broad rim 14 and small perforations 16 serves as a lid for a frying- pan 4. A handle 11 is shaped to coact with curved feet 12 when the colander is used as such. Flanges 15 on the rim cover a pouring channel of the' frying-pan and also serve as hand-holds.
Patent GB-782199-A (GB)
Title: Improvements in and relating to warping machines
Inventor: BONNELL WILLIAM
IPC: D02H3/00
Filed: 1955-02-07
Abstract: 782,199. Warping yarns. COURTAULDS. Ltd. Feb. 6, 1956 [Feb. 7, 1955], No. 3521/55. Glass 142(1) In a warping machine in which the speed of rotation of the warp beam is varied to maintain a constant winding, speed, a speed controlling device is incorporated in the drive to the beam and is connected to the cage of a differential gear. One input member of the gear is connected to a roller driven by the warp and the other input member is. driven by a constant speed motor; any difference in the speeds of the input members causes the cage to rotate and alter the speed of the drive to the beam. In one embodiment, a beam 8 is driven through a clutch 10 from a motor 9. The warp 2 passes over tension rollers 4, 5, 6and the roller 6 is connected by a flexible drive to one 13 of the input wheels of the differential gear 14, the other input wheel 15 being driven by a constant speed motor 16. Any difference in speed, between the wheels 13, 15 causes the cage to rotate and, through a shaft 11 to move the brushes of the motor 9 and thereby vary its speed. In other embodiments; the differential gear 14 may be replaced by an epicyclic gear or by a spur-gear differential. When the beam 8 is stopped by a brake, the motor 16 is also stopped by a brake to prevent the motor 9 from being speeded up.
Patent GB-788109-A (GB)
Title: Preparing polyglycol terephthalate-isophthalate copolyesters
IPC: C08G63/82
Filed: 1955-02-07
Abstract: A copolyester is made by polycondensing a mixture of a bis glycol terephthalate C or a low polymer thereof) and a bis glycol isophthalate (or a low polymer thereof) in presence of a catalytic amount of basic ferric acetate.  The glycol may be ethylene-, propylene- or butylene-glycol.  The bis glycol esters may be prepared by reacting the glycol with the free acids or their monohydric esters or by reacting the sodium or potassium salts of the acids with ethylene chlorhydrin.  In an example, ethylene glycol, a 75/25 dimethyl terephthalate/dimethyl isophthalate mixture and basic ferric acetate was heated at 197 DEG  C. under nitrogen gas to effect ester-interchange.  The pressure was then gradually reduced to 0.1 mm. of Hg. and the bis glycol esters heated to 260 DEG  C. to effect polycondensation. Specification 766,290 is referred to.
Patent GB-1451744-A (GB)
Title: Skin-care and skin-protection agents
IPC: A61Q17/04
Filed: 1975-01-28
Abstract: 1451744 Skin-cosmetics HENKEL & CIE GmbH 28 Jan 1975 [29 Jan 1974] 3572/75 Heading A5B A skin-care or skin-protection agent contains 1-20% of a compound of formula: wherein R is H or C 1-4  alkyl, X is furan or tetrahydrofuran, M is H, alkali metal, alkaline earth metal, ammonium, alkylammonium or hydroxyalkylammonium. Many such compounds are specified. Exmples disclose day cream, baby cream, night cream, boron/glycerine cream, sun-screen cream, face pack. aftershave and face lotion.
Patent GB-1413771-A (GB)
Title: Solid state switch structure
IPC: H03K17/97
Filed: 1974-01-25
Abstract: 1413771 Controlled non-linear inductors ILLINOIS TOOL WORKS Inc 25 Jan 1974 [2 Feb 1973] 3599/74 Heading H3X A switch comprises two apertured wires 12, 14, Fig. 1 which are saturated alternately according to the position at the limits of its movement of a displaceable magnet structure 22, and are both saturated when the magnet passes through a range of intermediate positions, the saturation of a core isolating a sense winding 18, 20 from a variably-energized drive winding 16 to which it is normally inductively coupled. Instead of moving transversely of the core apertures as shown the magnet may be moved parallel to a common core axis, Fig. 4 (not shown). The magnet structure may consist of two pairs of magnets 50, 51, Fig. 6, located at respective ends of a rocker actuator pivoted at 56, each pair of magnets when in the saturating position straddling the core 42, 43. In a modification, Fig. 8 (not shown), the rocker actuator carries a single magnet for each core. In a further embodiment, Fig. 10, the drive and sense windings passed through cores 70, 71 are conductive loops 76, 77, 80, 81 attached by solder 78 to portions 73, 74, 75 of a printed circuit board. A single permanent magnet 82 slidably movable between two positions is used for saturating the cores, the magnet being secured to a slide element 83 displaceable by a pivoted actuating lever 88. Rollers 91, 92 on the slide element engage a panel 93 which may include detents for limiting the slide movement. The sense winding outputs may be applied as respective inputs of a bi-stable flip-flop, Fig. 3 (not shown).
Patent GB-1035325-A (GB)
Title: Windshield cleaning device
IPC: B60S1/50
Filed: 1963-01-29
Abstract: 1,035,325. Windscreen cleaning systems. F. HANSELMANN. Jan. 29, 1963 [Jan. 31, 1962], No. 3609/63. Heading A4F. [Also in Division B8] A windscreen washer system comprises a chamber 26 for receiving washing liquid by gravity from a supply container 27, and connected by a conduit 2 to a chamber 10 which is filled with compressed air from a source (not shown) via an inlet 1. The washer is actuated by depressing a push button valve 11 to allow compressed air to pass from the chamber 10 through the conduit 2 to lift a valve member 32 to seal the metering chamber 26 from the reservoir 27, and to eject the contents of the chamber 26 through a conduit 38 on to the windscreen. Different constructions for the valve 32 are described. Reference has been directed by the Comptroller to Specifications 866,218 and 903,472.
Patent GB-290335-A (GB)
Title: Improvements in or connected with ash handling and quenching plant for furnaces and the like
IPC: F23J1/02
Filed: 1927-02-09
Abstract: 290,335. Ludwig, L. Feb. 25, 1927. Thermal switches for use in lamp-holder adapters to produce a flashing light comprise a straight bimetallic arm 26 connected at 16 to an insulating base 14, which is of flexible mica &c. to prevent permanent deformation of the bimetallic arm and loosening of the connection 16.
Patent GB-285081-A (GB)
Title: Process for manufacturing moulded bodies from carbon or mixtures of carbon and metal, with metal insertions
IPC: H01R43/12
Filed: 1928-02-07
Abstract: 285,081. Siemens, K.. F. von, Siemens, H. von, and Franke, A., (trading as Siemens & Co., Geb.). Feb. 11, 1927, [Convention date]. Brushes.-Dynamo brushes and like electrical contacts, moulded from mixtures of carbon or metal and carbon, are provided with metal inserts for the reception of screws by moulding the mixture about metal inserts placed on the bottom of the mould. The inserts may be tapered to prevent subsequent withdrawal from the article and may be positioned within the mould by pins on the mould bottom or by recesses therein; in the last-mentioned case, the projecting portion of the insert is subsequently removed by grinding &c.
Patent GB-662781-A (GB)
Title: Improvements in and relating to sharpeners for safety-razor blades
IPC: B24D15/08
Filed: 1949-02-14
Abstract: 662,781. Sharpening and cleaning safetyrazor blades. KRISCHKE, H. A., and DAVIS, A. G. Feb. 10, 1950 [Feb. 14, 1949; May 28, 1949], Nos. 3933/49 and 14351/49. Classes 60 and 138 (i) A device for sharpening and cleaning or oiling safety-razor blades comprises two rigid blocks 1, each of which has an abrasive or sharpening surface and which are inclined to each other at an angle that will sharpen the cutting edge or edges of the blade 4 when it is moved longitudinally or transversely of the blocks, the latter being spaced from each other with soft fabric means 5 rigidly mounted therebetween for cleaning and oiling the blade. The blocks are preferably made of glass and their sharpening surfaces may be smooth or rendered abrasive by grinding or sand-blasting. The Y- shaped holder to which the blocks are secured by cement is made from sheet aluminium and is provided with two slots 8 and 9 which allow the cleaning of double-edged and single-edged blades, respectively. The fabric 5, which may be baize, is similarly slotted and is soaked or impregnated with a lubricant, such as machine oil. The first Provisional Specification states that the holder may be made from the material known by the Registered Trade Mark of " Perspex " with sharpening surfaces of very fine emery paper.
Patent GB-945595-A (GB)
Title: Photographic printer
IPC: G03B27/52
Filed: 1960-02-04
Abstract: 945,595. Photographic projection printing apparatus. PAKO CORPORATION. Feb. 4, 1960 [March 6, 1959], No. 3972/60. Headings G2A and G2J. A photographic projection printer comprises a supporting structure, an optical section including objective lens, an illuminated negative section including a negative holder, and a paper section carrying photo-sensitized paper, one of such sections being fixed relative to said supporting structure, means for guiding the other two sections for movement along the optical axis of the optical section in a manner such that the distance between the sections for varying the size of the prints with images in focus is determined by the formulae d 1  = (M + 1)f, and d 2  = (M + 1/M)f, where d 1  is the distance between the lens and the paper and d 2  is the distance between the lens and negative, M is the magnification and f the predetermined focal length of a suitable objective lens, adjusting means engaging the movable sections and simultaneously moving the same along said axis to vary the size of the image and maintain focus, and a compensating lens system for adjusting the actual focal length of the objective lens system to correspond to the value f in the above formulae. As shown (Figs. 1 and 3), the printer comprises a supporting table A, an illuminating section D mounted under said table A, a negative holder E mounted on a transparent insert 40, an optical section F slidably mounted on fixed vertical columns 51, 52 (only 52 of which can be seen in Fig. 3), and a paper section C which contains a roll of photo-sensitized paper, is slidably mounted on the columns 51, 52, and is counterbalanced by weights 143 sliding in standard 34 and connected to the paper section housing 110 by a cable 137. Adjusting means engaging the movable sections F and C for automatic focusing comprises two helical cams 171 and 172, mounted on a rotatable drum 150 and engaged respectively by rollers 183 and 202 on the said sections. The shaft 154 of the drum may be rotated through worm gearing (Fig. 6 not shown) by means of a hand wheel 218, and the magnification ratio set at a particular time may be read through a window 226 in a housing 230 of the adjusting means by reference to a scale 225 provided on a wheel rotatable with said shaft. The optical section F comprises (Fig. 12) a conventional projector lens 90 of nominal focal length 3.6 inches-which value is used in the setting of the helical cams 171, 172- and a compensating lens system 100 for bringing the focal length of the projection lens up to this nominal value. In the embodiment shown, the compensating lens system comprises a positive meniscus lens 105 mounted by means of a housing 104 at a fixed distance from the projector lens 90 and a negative meniscus lens 102 mounted at a variable distance from the lens 105 by means of a housing 101 screwthreaded by engaging the housing 104. Optical data for these compensating lenses is given. Specification 945, 593 is referred to.
Patent GB-328948-A (GB)
Title: Improvements relating to air filtering, heating, humidifying and like apparatus
IPC: B01D46/02
Filed: 1929-02-06
Abstract: 328,948. Andrew, T. Feb. 6, 1929. Air, treating.-Air for use in buildings is passed through a filtering- apparatus comprising a number of horizontal fabric tubes a, the open ends of the tubes, to which the air is admitted, being detachably clamped by rings d to rings c projecting from a Plate b, and the closed ends of the tubes being each provided with a wooden block e connected by a spring e<1> to a supporting bar f. Caps are provided for closing the rings c when the tubes a are removed for cleaning. The tubes a are mounted in a casing i which may be preceded by an air inlet chamber. After filtering, the air may be drawn through a compartment k containing heating pipes, water sprayers, or other means for heating or cooling, and humidifying or drying the air. The air is drawn through the apparatus by a fan g.
Patent GB-564140-A (GB)
Title: Improvements relating to chucks
IPC: C03B23/045
Filed: 1943-03-11
Abstract: 564,140. Uniting metal to vitreous material. BRITISH THOMSON -HOUSTON CO., Ltd., and SINCLAIR, W. D. March 11, 1943, No. 3982. [Class 36] [Also in Group XXII] Chucks for holding fragile objects such as glass tubes comprise two telescopic members with opposed conical surfaces at their far ends. The inner member is attached to a spindle 8 and carries a driving pulley 5. The outer member 1 carries a number of fingers 2 mounted in slots and normally held parallel with the axis by a garter spring 3. A spring 6 engaging recesses in the member 1 and the pulley 5 forces the fingers to ride up the cone 4 and grip the tube internally, the end of the tube being centred by the cone on the member 1. The glass tube may be sealed to a coaxial metal tube by rotating the tubes at high speed, and softening the glass by heat when centrifugal force causes expansion to effect the seal.
Patent GB-1370827-A (GB)
Title: Honing machines and drive arrangements therefor
IPC: B24B33/06
Filed: 1972-01-28
Abstract: 1370827 Honing machine control MASCHINENFABRIK GEHRING KG 28 Jan 1972 [30 Jan 1971] 3998/72 Heading B3D  A drive arrangement for traversing a rotary or other honing tool 12 includes control means whereby, immediately prior to commencement of reverse traversing movement, such movement can be delayed for a preselected time. The hone 12 is advanced by pressure P directed from an inlet 1 through a passage 3 to a cylinder chamber 6, fluid from a lower chamber 7 exhausting through passages 4, 23 and a regulator 25 for governing the advance rate. As shown at the end of the stroke, a cam 10 co-operates with a member 17b to shift a valve 17, so that the input pressure P is connected to a line 19 and a previously, pressurized passage 20 to drain, and a main valve 2 is shifted, Fig. 2 (not shown). Pressure from the inlet 1 then acts through the passage 4, the passage 3 being connected to a line 24, which remains blocked by a delay control valve 29 with the hone 12 in a dwell condition. A passage 21 branching from the line 19 leads pressure through a valve 32 and regulator 34 to the control valve 29, the valve 29 being shifted at a rate governed by the regulator 34 so that the line 24 becomes connected with a passage 26, Fig. 3 (not shown), the chamber 6 being thus connected to exhaust through the regulator 25, so that the hone up-stroke is initiated after the required dwell period. To terminate the upstroke, Fig. 4, a cam 11 contacts the member 17b, shifting the valve 17 to its initial position, the passage 20 being pressurized and the line 19 connected to exhaust so that the valve 29 is returned to its initial position. To inactivate the control valve 29 when no dwell is required, the valve 32 may be shifted by electromagnetic means 37, so that pressure through an inlet 31 acts on the valve 29 to maintain a permanent connection between the line 24 and passage 26, c.f.. Fig. 3 (not shown), The dwell time may, further, be modified by adjustment of the valve 34 or a stop screw 30, and the valve 17 may be replaced by electric, pneumatic or mechanical reversing control means.
Patent GB-872829-A (GB)
Title: Milling and boring machines
IPC: B23Q1/62
Filed: 1959-02-05
Abstract: 872,829. Copy-milling. HOERN, J, H. Feb. 5, 1959, No. 4156/59. Class 83 (3). A copying machine tool comprises two coaxial cams 41, 61 in a carriage 20, one of which reciprocates the carriage and the other operates a lever 71 to reciprocate a slide 58 mounted on the carriage. The carriage 20 moves on guide-rods 18 as the cam 41 is rotated by worm gearing 28, the cam 41 engaging a roller 39 carried by a yoke 35. The cam 41 is held against the roller by a fluidoperated piston P. A similar device 83 holds the slide 58 against the lever 71 which is rocked by the cam 61. The slide 58 carries a vertically-movable slide 87 on which a rotary tool T is adjustably mounted. The slide is reciprocated by a third coaxial cam 97 through a lever 104, and a follower 98 held against the cam by fluid-pressure means. The workpiece is clamped on a table which is indexable to bring a new workpiece into operative position.
Patent GB-664190-A (GB)
Title: Improvements in and relating to supports for skeins of knitting wool and the like
IPC: D04B3/06
Filed: 1949-02-16
Abstract: 664,190. Skein-supporting means. HOLT, H. A. Feb. 10, 1950 [Feb. 16, 1949], No. 4177/49. Class 120(ii) A skein-supporting means comprises a body, having a cup-shaped portion at one end A, the wall of said cup-shaped portion being thin relative to its maximum outer diameter, means at the other end B for attaching the body to a flat surface by a suction effect and central skeinengaging stem portion C connecting the two ends. The body is preferably formed as a unitary rubber moulding and two or more such bodies may be used for holding a skein of wool.
Patent GB-280077-A (GB)
Title: Improvements in the use of gas-filled photo-electric cells
IPC: H01J40/16
Filed: 1927-02-15
Abstract: 280,077. General Electric Co., Ltd., and Campbell, N. R. Feb. 15, 1927. Vacuum tubes. - In the use of a gasfilled photo-electric cell for photometric purposes, means for applying to the cell a voltage just below the stopping voltage is combined with means for subjecting the cell to a constant illu mination just insufficient by itself to make the cell reach the condition in which a small change of illumination produces a relatively large change of current. A voltage is applied to the cell approximately equal t,o the voltage at which a glow discharge started in the unilluminated cell will stop as the voltage is reduced, giving the curve of current and illumination shown in Fig. 1. A primary illumination OA is applied to the cell so that a small increase in illumination will result in a great increase of current. A suitable construction of cell consists of a glass vessel 1 having a lead 2 making contact with a potassium. covered silver coating, and a ring 4 carrying an open gauge 5 as anode. The cell is filled with argon to a pressure of about 0.16 mm. Specifications 232,183; 243,349, [Class 40 (v), Wireless signalling &c.] ; and 264,173 are referred to.
Patent GB-524849-A (GB)
Title: Improvements in the manufacture of butadiene
IPC: C07C1/24
Filed: 1939-02-09
Abstract: 524,849. Butadiene. CONSORTIUM FUR ELECTROCHEMISCHE INDUSTRIE GES. Feb. 9, 1939, No. 4237. Convention date, Feb. 9, 1938. [Class 2 (iii)] Butadiene is prepared from 1 : 3 butylene glycol or its ether (##<SP>1</SP>-dihydroxy butyl ether) by splitting off water in the presence of an amount by volume of water many times as great as the amount of butylene glycol present, in the presence of water splitting catalysts, the splitting taking place in the liquid phase at temperatures above 100‹C., the butadiene being removed from the reaction mixture immediately after its formation. The preferred water splitting catalysts are mineral acids and their acid salts, sulphonic acids, phosphoric acid, and perchloric acid. In an example, 80 parts of 1:3 butylene glycol in 20 parts of water is passed into 2000 parts of 1 per cent. sulphuric acid boiling at 200‹C. in an autoclave. The butadiene is drawn off as fast as it is produced.
Patent GB-789269-A (GB)
Title: Improved method of producing a compound which is capable of increasing the calcium content of the blood
IPC: A61K41/00
Filed: 1956-02-10
Abstract: The invention comprises a substance having maxima in the U.V absorption spectra, when dissolved in ethanol, at 242 mm  and 259 mm , and being the product obtained by reduction with an alkali metal and an alcohol of the U.V. irradiation product of 7-dehydrocholesterol or an ester thereof and the preparation thereof. Sodium may be used as alkali metal.  As the alcohol there may be used ethanol, propanol, propanol-2, butanol, 2-methyl butanol-2, ethane diol-1,2 and propane-diol-1,3.  Reaction may be effected at 70-140 DEG  C.  Examples describe the reduction of Vitamin D3 and of a product obtained by irradiating 7-dehydrocholesterol.ALSO:A product obtained by reduction with an alkali metal and an alcohol of the U.V. irradiation product of 7-dehydrocholesterol or an ester thereof, can be employed in aqueous dispersions or solutions for increasing the calcium content of the blood of animals.  Additives, e.g. NaCl and glycerine, may be employed to obtain solutions isotonic with blood.