baber/WOPTO huggingface dataset:
Patent GB-821958-A (GB)
Title: Purifying acrylonitrile by distillation
Filed: 1956-09-26
Abstract: Acrylonitrile is obtained from a dilute aqueous solution thereof, which contains lactonitrile as an impurity, by subjecting the solution to steam-stripping while maintaining the pH of the solution at about 6 to 9 by addition of an hydroxide, phosphate, borate, or carbonate of an alkali or alkaline-earth metal, or a corresponding ammonium compound.  Under these conditions the lactonitrile is dissociated into acetaldehyde and hydrogen cyanide; and these compounds distil over with the acrylonitrile, so that the residue may safely be discharged to waste.  On condensation, the distillate stratifies into a water layer and an acrylonitrile layer.  The water layer may be returned as reflux to the stripping column.  The acrylonitrile layer, which contains acetaldehyde and hydrogen cyanide, is further treated to obtain a pure product.  In an example, an aqueous acrylonitrile solution, obtained by water-scrubbing a gas from the reaction of HCN with acetylene, and having a total HCN concentration of 2140 p.p.m. of which 1140 p.p.m. is as free HCN and the remainder is in the form of lactonitrile, is adjusted to a pH of 6.3 by the addition of 0.5N caustic soda.  The solution is then stripped with steam over a period of 20 minutes at 100 DEG  C.  After stripping, the concentration of HCN in the column-bottoms, either in the form of lactonitrile or as free HCN, is found to be only 78 p.p.m.ALSO:Acrylonitrile is obtained from a dilute aqueous solution thereof, which contains lactonitrile as an impurity, by subjecting the solution to steam-stripping while maintaining the pH of the solution at about 6 to 9 by addition of an hydroxide, phosphate, borate or carbonate of an alkali or alkaline-earth metal, or a corresponding ammonium compound.  Under these conditions the lactonitrile is dissociated into acetaldehyde and hydrogen cyanide; and these compounds distil over with the acrylonitrile, so that the residue may be safely discharged to waste.  On condensation, the distillate stratifies into a water layer and an acrylonitrile layer. The water layer may be returned as reflux to the stripping column. The acrylonitrile layer, which contains acetaldehyde and hydrogen cyanide, is further treated to obtain a pure product.  In an example, an aqueous acrylonitrile solution, obtained by water-scrubbing a gas from the reaction of HCN with acetylene, and having a total HCN concentration of 2140 p.p.m. of which 1140 p.p.m. is as free HCN and the remainder is in the form of lactonitrile, is adjusted to a pH of 6.3 by addition of 0.5 N caustic soda.  The solution is then stripped with steam for 20 minutes.  After stripping, the total concentration of HCN in the column-bottoms is only 78 p.p.m.
Patent GB-1220087-A (GB)
Title: Nickel complexes of oximes and their use in stabilizing polymers
Inventor: BRIGGS PETER JAMES
IPC: C07F15/04
Filed: 1967-06-26
Abstract: 1,220,087. Stabilized polymer compositions. IMPERIAL CHEMICAL INDUSTRIES Ltd. 13 June, 1968 [26 June, 1967], No. 29427/67. Heading C3P. [Also in Division C2] As light-stabilizers for polymers, use is made of chelate complexes of nickel with oximes of the formula in which R denotes an optionally substituted alkyl or alkenyl group of at least 6 carbon atoms and'the benzene ring may be further substituted. The optional substituent of the benzene ring may be fused to that ring, as in a naphthalene ring (see Division C2). Specified polymers which may be stabilized are polyolefins, polyvinyl chloride, polyformaldehyde and polyamides. The nickel compounds may be used in association with anti-oxidants, a number of which are specified. Other additions may also be made. Comparative examples are given of the stabilization of polypropylene. Specification 1,141,354 is referred to.
Patent GB-155808-A (GB)
Title: Improvements in braiding machines
Inventor: TOBER CARL
IPC: D04C3/00
Filed: 1920-10-19
Abstract: 155,808. Tober, C. Dec. 24, 1919, [Convention date]. Braiding-machines.-In machines in which sliding inner bobbin carriers 37 are driven round by a system of rollers 30, tracks 71, 73 carried by the spider 7 and situated at or near the highest and/or lowest positions a, b of the outer threads are arranged so as to bear on or support rollers 70. 72 and thus replace wholly or in part the sliding pressure of the carriers 37 on the slide track 41 by a rolling pressure. Fig. 4 shows a roller 75 with an annular flange 75<a> of non-metallic fibrous material which rolls on a lower track 76. The bobbin frame 50 is provided with a weight 110, the centrifugal force of which, in the running of the machine engenders an upwardly directed component which wholly or partially compensates the effect of gravity on the weight &c. thus reducing sliding friction. The carriers 37 are driven round by the action on rollers 23 of the driving rollers 30 which are mounted on axles carried by a rotating spider 26 and are driven by the engagement of a fixed annular gear 33 with pinions 32. The outer threads come from bobbins 18 and are operated by swinging levers mounted in vertically adjustable bearings 6 which carry rollers 3 running on a track 8.
Patent GB-915718-A (GB)
Title: Improvements in and relating to feedwater temperature control systems of turbine plants
Inventor: JONKER WILLIAM ABRAHAM ADOLF J
IPC: F01K7/40
Filed: 1958-09-16
Abstract: 915,718. Feedwater heaters. ENGLISH ELECTRIC CO. Ltd. Aug. 31, 1959 [Sept. 16, 1958], No. 29579/58. Class 64 (1). In a feedwater temperature-control system for a steam-turbine plant, the feedwater temperature is automatically adjusted by controlling the pressure in the feedwater de-aerator 1, 2 by means of steam, the quantity of steam supplied being determined by a pressureactuated flow-controller 12 responsive to pressure in the de-aerator and wherein a second pressureactuated flow-controller 16 responsive to pressure in the de-aerator operates a relief-valve 8 between the de-aerator and a point of lower pressure, such as the condenser 37. The deaerator comprises upper and lower vessels 1, 2, feedwater being supplied to the upper vessel through a pipe 3. It is drawn off by a pump 4 and passes to a boiler (not shown) through a pipe 5. Exhaust steam passes from a backpressure turbine 26 into the upper vessel and excess is passed, via the pipe 7, into the condenser 37 of a main turbine 36. A loadcontroller 20 connected to the supply pipe 24 to the turbine 26 is also connected by a pipe 19 to the flow-controller 12, and through a pipe 15, to the second flow-controller 16. A heater 45 is inserted in the supply-pipe 3 in heatexchange relationship with steam tapped off the pipe 6, condensate being pumped back into the pipe 3 by a pump 46. A reservoir 41 is connected both to the condenser 37 and to the lower vessel 2.
Patent GB-1444936-A (GB)
Title: Power-and-free conveyor systems
IPC: B61B10/02
Filed: 1973-06-22
Abstract: 1444936 Conveyors REDMAN FISHER ENG Ltd 5 June 1974 [22 June 1973] 29769/73 Heading B7L A conveyor system comprising a track 10, 11, a plurality of trolleys 15 movable along the track, and an elongated power-driven propelling element movable parallel to the track, the propelling element and at least some of the trolleys having cooperating dogs for transmitting drive from the propelling element to the trolleys, is characterized in that one trolley has a dog 20 movable positively between its operative position, wherein it cooperates with a dog on the propelling element, and its inoperative position under the control of means arranged along the track. The trolley has an upstanding pin 24 on which a turntable 22 is mounted. The turntable supports a dog 20 and has arms 32, 33 cooperating with abutments 31 arranged along the tracks 10 and 11, Fig. 3, whereby the dog is moved in a horizontal plane between its operative and inoperative positions. The turntable has depending side walls 28 cooperating with the edges of the track to prevent rotation of the turntable except in the vicinity of the abutments 31 where the track is cut-away as at 29, 30. Alternatively, the turntable is a circular plate and a pivoted latch on the trolley engages the turntable to hold it in its operative and inoperative positions. A cam surface on the track adjacent the abutment releases the turntable for movement. The lateral arms 32, 33 may be arranged so that the turntable always moves in the same direction and the pin may be inclined to the vertical so that in its inoperative position the dog 20 lies below the dog on the propelling element rather than to one side.
Patent GB-717955-A (GB)
Title: Improvements in or relating to a mechanism for dispensing pressure-sensitive adhesive tape
IPC: B65H35/00
Filed: 1952-11-26
Abstract: 717,955. Tape dispensers. DERBY SEALERS, Inc. Nov. 26, 1952, [Dec. 8, 1951.] No. 29935/52. Class 18. In a dispenser for pressure-sensitive adhesive tape a supply roll 15 is supported in a frame 11 the tape 16 being drawn from the supply roll by a feed roll 17, and from the feed roll by a stripper roll 19. The two rolls have continuous peripheral surfaces which are knurled or roughened, and they are spaced slightly apart and are driven by gearing so that the stripper roll has a greater peripheral speed than the feed roll. A lever 26 is secured to a shaft 25 which is provided with a one-way connection with the gearing, oscillation of the lever 26 giving the rolls 17, 19, a step-bystep movement to draw the tape from the supply roll. Movement of the lever in a clockwise direction is limited by a stop 27 secured to the frame and movement in the other direction is limited by a lug 28 on a measuring disc 29 which may be adjusted to supply the required length of tape by means of an arcuate slot 30 and screw 31. A spring may be provided to return the lever to its rest position against the stop 27. A removable cover 33, Fig. 5, is provided at its rear end with a downwardly turned flange 34, which engages with lugs on the frame 11, and at its forward end is provided with a downwardly extending portion 36 in which are recesses 37 which co-operate with lugs on the frame.' A resilient presser member of the type described in Specification 717,956, in the form of a spring plate 39 provided with a cutting edge 43, is secured to the cover and presses the tape against the stripper roll 19. In the portion 36 of the cover an adjustable screw 41 limits the movement of the plate 39 in a direction away from the roll. The feed roll and the stripper roll may comprise a plurality of spaced disc-like members, or one may be a solid roll and the other provided with the spaced discs.
Patent GB-706330-A (GB)
Title: Improvements in or relating to a method of manufacturing moulded rubber and textile fabric footwear
IPC: B29D35/14
Filed: 1950-12-07
Abstract: 706,330. Rubber-soled footwear. SVIT, NARODNI PODNIK. Dec. 7, 1950 [Dec. 10, 1949], No. 30024/50. Class 17(2) In a moulded shoe of rubber and textile, the foxing and sole are of different rubber compositions, e.g. with different physical characteristics, and, it may be, of different colours, and, in order to prevent the colours from running into one another during the moulding and vulcanization of the foxing and sole to the upper. the edge of one of the parts is pressed into the other part after they have been assembled and stuck together. The edge may be of serrated or other decorative formation 2.
Patent GB-1196032-A (GB)
Title: Polymerization of Vinyl Chloride
Inventor: REKERS LOUIS JOSEPH
IPC: C07C409/38
Filed: 1967-06-29
Abstract: 1,196,032. Polymerizing vinyl chloride. NATIONAL DISTILLERS & CHEMICAL CORP. 29 June, 1967 [29 June, 1966], No. 30036/67. Heading C3P. Vinyl chloride is polymerized in the presence of a tertiary alkyl per-3-butenoate (see Specification 1,079,725). In an example, suspension technique is used.
Patent GB-158755-A (GB)
Title: Improvements in travelling bags, hand bags, purses, cigarette cases, and the like
IPC: A45C3/00
Filed: 1919-12-02
Abstract: 158,755. Burch, J. B. Dec. 2, 1919. Hand and like bags; purses; pouches.-Travelling bags, hand-bags, purses, cigarette cases, &c. are stiffened at the seams, edges, or other parts by metal rods, strips, tubes, or helical spring coils enclosed in the usual piping having a selvedge which is attached to the article or in piping formed in the article itself. The bag shown in Fig. 3 is stiffened by a frame C extending along the top and side outside edges and across the ends at the bottom, the frame C, Fig. 9 being enclosed in the piping B, which is attached to the bag by the selvedge E. When the bag has a flexible or hinged bottom, the frame is hinged or provided with a coil at D. The piping and enclosed rods &c. may be arranged within the bag &c. Additional rods A enclosed in a piping B<1> or in a fold of the material of the bag &c. may be placed in the sides of the article.
Patent GB-1416860-A (GB)
Title: Earth cutting machines
IPC: F03C7/00
Filed: 1971-10-19
Abstract: 1416860 Earth-cutting machines D FIRTH K FOSTER and C J HOOKE 9 Nov 1972 [19 Oct 1971 4 Aug 1972] 30055/75 and 30056/75 Divided out of 1416859 Heading E1F [Also in Division Fl] An earth cutting (e.g. boring) machine, Fig. 7A, includes a cutting tool 202 driven by a fluid operated reciprocatable device, the device comprising an outer member 200, 208 carrying the tool 202, an inner member 212, 214 reciprocable relative to the outer member, and a resilient member 210 sealingly connected between the members 208, 212, the resilient member 210 having an average length in the direction of reciprocation greater than the average thickness measured normal to the direction of reciprocation. In operation an hydraulic system produces a pulsating pressure in a working chamber 222 defined by the outer member 200 and the flexible member 210. The pulses cause vibration of masses 216, 218, the latter being arranged to vibrate freely or to strike the tool 202. In the system shown, Fig. 4, a gear pump 70 controlled by a relief valve 80 delivers a substantially constant pressure past a non-return valve 78 to the device 10. At the same time a reciprocating pulse generator 84 delivers a pulsating supply to the device 10 downstream of the non-return valve 78, a relief valve 96 controlling the maximum pressure supplied to the device 10. An alternative system, Fig. 3 (not shown) consists of an oscillating spool valve which connects the device alternatively to a pump (40) and a reservoir (66). The hydraulic systems may be arranged to produce a forward stroke of the device which is of greater speed than the return stroke. The device 10 may be of circular, rectangular, square, triangular, polygonal, elliptical or irregular cross section. The inner member 32 of the rectangular construction of Fig. 2 is provided with a tool steel or tungsten carbide cutting edge 34. Such a construction is suitable for use as the cutting blade 32 of an earth cutting machine 300, Fig. 8, movable on crawler tracks 302, the blade being positionable by an hydraulic jack 306. The resilient member 22 is preferably of rubber having a uniform steel or tapering thickness and is 'bonded to the inner and outer members of mild steel. To improve the mechanical properties of the device the resilient member 22 is placed under compression by swaging the outer member inwardly by approximately 10% of its initial dimensions. Pressure may be applied to the inner end of the inner member via a floating piston (120), Fig. 6 (not shown).
Patent GB-278547-A (GB)
Title: An improved chimney pot or ventilating cowl
IPC: F23L17/02
Filed: 1927-04-30
Abstract: 278,547. Gough, H. T. W. April 30, 1927. Chimney and ventilating-shaft tops comprise two concentric series F, D of spaced vertical plates arranged above the orifice from the flue and surmounted by a cone or cap G, and the inner plates D are wholly or in part reduced in height so that a clear passage is provided between the tops of such plates and the level of the bottom of the cap G. The outer plates F are arranged so as to protect the gaps between the inner plates D, and both series of plates are mounted on an apertured diaphragm C carried by a truncated cone B extending into the flue A. The truncated cone G may be provided with slanting openings J protected by cover-pieces K bent out from the cone, and the whole top is surmounted by a nest of louvres. The plates F' may constitute the supporting means for the cowl G, or legs L, to which the plates F are connected, may be provided. In the case of a ventilating cowl, the cap is closed at the top.
Patent GB-1483200-A (GB)
Title: Dyestuffs derived from triphenylmethane their preparation and use
IPC: C09B11/00
Filed: 1974-07-08
Abstract: 1483200 Triphenylmethane dyestuffs PRODUITS CHIMIQUES UGINE KUHLMANN 8 July 1974 [6 July 1973] 30118/74 Heading C4P [Also in Division C2] The invention comprises triphenylmethane dyes of the general formula wherein R 2  and R 4  which may be different are H, alkyl, hydroxyalkyl or cyanoethyl, one of R 1  and R 3  is a 2,2,2-trifluoroethyl group and the other is an alkyl group or a 2,2,2-trifluoroethyl group, ring A may be substituted by 1 or 2 chlorine atoms or an alkyl or alkoxy group, rings B 1  and B 2  may each be substituted by at least one alkyl or alkoxy group and X# is a colourless monovalent anion. They are prepared by (a) condensing one molecule of optionally substituted benzaldehyde with two molecules of a compound of general formula and oxidizing the leuco compound formed (b) by condensing a p-aminobenzophenone of the general formula with an aniline of general formula or (c) by condensing a p-aminobenzophenone of the general Formula V  with an aniline of the general Formula II shown above in presence of a condensing agent, in which formulµ R 2 , R 3  and R 4  are as above. The dyes are used to dye polymers and copolymers of acrylonitrile and anionically modified polyamides and polyesters.
Patent GB-1138817-A (GB)
Title: Process for the preparation of high molecular weight polymers of conjugated dienes
IPC: C08F2/00
Filed: 1966-07-05
Abstract: 1,138,817. Metal carbonyls as polymerization catalysts. STAMICARBON N.V. 5 July, 1966 [9 July, 1965], No. 30186/66. Heading C3P. A conjugated diene is polymerized using a mixture of a nickel and/or cobalt carbonyl or partly-substituted carbonyl compound and a halide of a metal of Groups IV to VI of Mendeleef's Periodic Table by a process wherein carbon monoxide is released from the carbonyl compound in the presence of a conjugated diene and at least a part of the carbon monoxide formed is removed before or during polymerization. The carbon monoxide is preferably removed by the evaporation of part of the conjugated diene. -In the examples butadiene, isoprene, cyclopentadiene, dimethylfulvene and a mixture of isoprene and butadiene are polymerized in solution in the presence of a metal halide which is titanium tetrachloride, tetrabromide or tetraiodide, vanadium tetrachloride, vanadyl chloride, tungsten hexachloride, tin tetrachloride, or antimony tetrachloride. If desired a compound containing a free electron pair, such as air or water, may be added to the polymerization mixture.
Patent GB-817911-A (GB)
Title: Brackets for cycle fittings
Inventor: PURDEN ROBERT HESKETH
IPC: B62J6/06
Filed: 1956-10-04
Abstract: 817,911. Vehicle lamp supports. LUCAS (INDUSTRIES) Ltd., J. Sept. 25, 1957 [Oct. 4, 1956], No. 30251/56. Class 75(3) [Also in Groups XXV and XXXV] A bracket for attaching a dynamo o, for example, to a cycle is provided with a socket k for the reception of a stem m which extends from the dynamo o and has a lateral projection p, the socket k being formed with grooves t and u about 90 degrees apart and gaps q and r for passage of the projection p enabling the stem to be engaged in the socket by a sequence of axial and angular movements of the stem relatively to the socket. The bracket is constructed from a flat metal strip to form two side parts a, b and the socket k, a screw c being provided for clamping the stem in the socket and the side-part a being formed with an extension d for attaching the bracket by means of a screw i to a clip consisting of two sheet metal parts adapted to grip between them one of the cycle fork members g.
Patent GB-249195-A (GB)
Title: Improvements in or relating to holders for kinematograph films and the like
IPC: G03B17/26
Filed: 1924-12-16
Abstract: 249,195. Ponting, H. G., and Ford, G. W. Dec. 16, 1924. Kinematograph apparatus.-In film holders for use in a camera or projector for kinematograph or still pictures, and of the type comprising two spools each capable of being engaged by driving devices, a recess is formed in the portion of the outside wall of the holder against which the exposed length of film lies; when the holder is used in a kinematograph projector, the film may be illuminated by a reflector wholly or partly situated in the recess, and a kinematograph camera or projector for use with the holder may comprise an adjustable finger serving both as a guide for the film when the holder is being inserted, and as a clamping device when the holder is in position. As shown in Fig. 1, the wall 13 of the holder is formed with a recess 15 between film openings 16. One side of the recess is closed by one of the flat sides of the holder, and a hinged cover 18 having a flange 20, and enclosing the exposed length of film and the recess, is provided. Fig. 2 shows a modification in which the end of the film is left blank, or the film is connected to either or both spools by a strip of material which does not suffer damage by exposure and may be fireproof. As shown in Fig. 3, a kinematograph projector comprises a lamp 28, condenser 29, prism 30, and a projection lens 32, the prism 30 being situated within the recess in the casing 33. A guide member 34 has a hinged finger 35 which is turned into the position 36 to guide the film into the gate 31 when the holder is being placed in position, and is afterwards turned into the position 35 to clamp the holder. Specifications 12538/11, 188,681, 210,878, and 236,157 are referred to.
Patent GB-1238304-A (GB)
IPC: B32B27/00
Filed: 1967-06-30
Abstract: 1,238,304. Laminates. IMPERIAL CHEMICAL INDUSTRIES Ltd. 12 June, 1968 [30 June, 1967 (2); 15 Nov., 1967], Nos. 30350/67, 30351/67 and 51950/67. Heading B5N. [Also in Division C3] Syrups comprising a partially polymerized composition derived from at least one alkyl ester of acrylic acid, in which the alkyl group has 5 or more carbon atoms, and optionally not more than 20% by weight (based on total monomers) of a copolymerizable monomer (e.g. an alkyl methacrylate or styrene) are used as cements for bonding together two or more sheets of materials such as glass, polyvinyl chloride, polymethyl methacrylate, cellulose acetate and cellulose acetate butyrate. The syrup may contain a " cold-setting " polymerization catalyst or a catalyst which is activatable by heat or U.V. radiation. Where more than two sheets are bonded together, at least one of the cement interlayers may be formed of a material different from the polymerized syrup, e.g. polyvinyl butyral, plasticized polymethyl methacrylate and ethylene/hydroxyethyl methacrylate copolymer. In a preferred embodiment, an edge gasket having an inwardly extending flange is used for spacing apart adjacent sheets; the gasket may be formed from polymethyl methacrylate, polypropylene, vinyl chloride polymers or copolymers, or aluminium. Laminates bonded with the specified syrups are impact-resistant and are particularly useful in glazing for banks, prison windows, armoured bullion vehicles, personnel-carrying vehicles, high-speed vehicle windscreens, and glazing of cricket pavilions and golf clubhouses. In examples, laminates are formed from one or more sheets of glass together with one or more sheets or films of polyvinyl chloride.
Patent GB-412828-A (GB)
Title: Gentlemen's suit stand (folding)
IPC: A47G25/06
Filed: 1933-11-02
Abstract: 412,828. Stays for hinged articles. ANDERSON, W. G., 48, Lossie Wynd, Elgin, Morayshire. Nov. 2. 1933, No. 30412. [Class 65 (i).] A combined hinge and folding strut used for hinging the legs 11 to the upper shelf member 7 of a garment stand comprises strut portions 12 hinged together and to the hinge leaves 13. One strut portion may be extended beyond the pivot and provided with a pin 14, Fig. 3, to engage a gap 15 in the other section.