baber/WOPTO huggingface dataset:
Patent GB-1323831-A (GB)
Title: Single mixed refrigerant closed loop process for cooling a fluid  material
IPC: F25J1/02
Filed: 1971-04-19
Abstract: 1323831 Gas mixture liquefaction and separation process; refrigeration J F PRITCHARD & CO 19 April 1971 [14 Jan 1971] 25213/71 Headings F4H and F4P Cooling or liquefaction of a dry compressed gas stream 70, Fig. 1a, e.g. natural gas, is effected by passage through a single path 74a, 74b, 74c of an indirect heat exchanger 30 traversed by a single mixed refrigerant stream in a closed circuit comprising a compressor 18, after cooler-condenser 20 and expansion valve 46; the refrigerant stream having components of successively lower boiling points e.g. C5 to C1 hydrocarbons, the boiling point of one of which is below the liquefaction temperature of the feed mixture at the prevailing pressure, the boiling point of another component being sufficiently high to permit condensation in the aftercooler 20 and the freezing points of all the refrigerant components being below the feed liquefaction temperature. In operation the condensate formed at 20 is separated in a drum 24 and the resulting gas and and liquid streams 32, 34 are combined at 28, warmed in a path 42 of exchanger 30 before being expanded at 46 and returned at 48 through exchanger 30 and recycled to compressor 18. The feed gas mixture having been partly condensed in heat exchanger path 74a is withdrawn and fed to a fractionator 78 the overhead from which is returned at 80 to exchanger path 74b for further cooling and partial liquefaction. The feed stream is withdrawn at 82 and the condensate is separated at 84 and used as reflux for fractionator 78 whilst the gaseous feed stream is further cooled and fully liquefied in exchanger path 74c before being expanded at a valve 142 to storage pressure. The liquid bottoms from fractionator 78 are fed to a debutanizer column 106 from which product liquid butane is withdrawn through a line 132 and gaseous overheads from column 106 are condensed at 112, a portion thereof is used as reflux for column 106 and the remainder is passed through a line 120 and is liquefied in an exchanger 92 cooled by boil-off gas from the product L.N.G. storage container 146.
Patent GB-748666-A (GB)
Title: Improvements in or relating to slide wire potentiometers
Inventor: STYAN WILLIAM CARTER
IPC: H01C10/24
Filed: 1953-09-11
Abstract: 748,666. Variable resistances. VICKERS-ARMSTRONGS (ENGINEERS), Ltd. Aug. 13, 1954 [Sept. 11, 1953], No. 25233/53. Class 37. A slide-wire potentiometer comprises a drum around which a resistance wire is wound in an external screw thread groove and a threaded member which engages the thread on the drum so that when it is rotated it moves along the thread axially of the drum, a contact element being associated with the threaded member so as to make a sliding contact with the surface of the wire. Figs. 1 and 2 show a slide wire potentiometer in which a resistance wire is wound in a helical groove formed on the external surface of a drum 16 the ends of the wire being turned back and taken through insulator 15 to a brush contact 28 mounted on a holder 29 which is carried by a nut 30 located on an insulated adjusting screw 31. A nut 17 engages the screw threads on drum 16 and a radially projecting peg 18 engages in a longitudinal slot formed in a member 19 associated with shaft 20 so that on rotation of the shaft in its bearings 36 nut 17 rotates and peg 18 moves axially of the drum. A brush holder 21 (Fig. 2) mounted in a recess on nut 17 carries a contact 22 which on movement of the nut slides on the resistance wire in the helical groove on drum 16 and a contact 23 which slides over a take-off slip ring 24, which is insulated from casing 10 by insulating layer 25, and from which an output may be taken. Brush holder 21 is pivoted on a pin 26 having an insulating brush 27. A centre tap is made on the resistance wire, as shown on Fig. 3, by means of a peg 33 which projects through the wall of drum 16 and contacts the underside of the resistance wire wound thereon, the centre tap connects with the insulated output terminal 35<SP>1</SP> via lead 35 and contact spring 34. To stop rotation of shaft 20 when the limits of the resistance wire have been reached a stop collar 37 is fixed on shaft 20 and has a projection which engages with an angled tag (not shown) provided on a number of washers 38 which are loosely mounted on shaft 20. One washer is provided in respect of each turn of wire on drum 16 plus a number to allow for lost motion due to the width of the tags. Thus for each successive turn of shaft 20 the projection on collar 37 will engage a tag until on the last turn a fixed stop 39 prevents further rotation.
Patent GB-922466-A (GB)
Title: Improvements in and relating to sequence detectors
IPC: H01H67/26
Filed: 1959-08-10
Abstract: 922,466. Circuits employing bi-stable magnetic cores. AMP Inc. Aug. 10, 1959 [Aug. 18, 1958], No. 27256/59. Class 40 (9). [Also in Group XXXVIII] A device for identifying the occurrence of a predetermined sequence of signals from a source, comprises a sequence of bi-stable devices, set by corresponding signals of the sequence but unset by any signal from the source, with means associated with an occurring and an immediately preceding signal of the sequence to inhibit the unsetting of the devices. Magnetic core circuits.-The magnetic cores 110, 112 . . . , 117, are unset when flux lines travel clockwise about the central hole and set when the flux is clockwise about each of the smaller holes. An " A " signal passes through bucking winding 118, winding 120 to set the core 110, and over line 122 to the unsetting windings 130, 128, 126 and 124. The effect of the signal in winding 124 is counteracted by winding 118. The first signal of a group is of a strength greater than that necessary to switch a core; subsequent signals are just below the threshold strength. Such a signal (" T ") energizes bucking windings 132, 134 of cores 110, 112 respectively and transfer winding 136. If core 110 is set, the signal is amplified above threshold strength to set core 112. The signal is also applied over line 122 to the unset windings. An "O " signal would now result in core 114 being set from core 112 in similar fashion to that described for core 112 while 110 would be unset. Thus a correct sequence of signals will result in core 117 being set. An incorrect sequence, whether containing a wrong signal or in the wrong order will unset the cores.
Patent GB-706007-A (GB)
Title: Improvements relating to trays
IPC: A21B3/15
Filed: 1949-10-01
Abstract: 706,007. Bakers' trays. THOMAS, T. R., [trading as T. & R. INDUSTRIAL SUPPLIES CO.]. Sept. 29, 1950 [Oct. 1, 19491, No. 2,5295/49. Classes 18 and 66 Bakers' trays are formed with metal walls having outwardly and downwardly turned flanges at the base, enabling them to be stacked with the base of an upper tray engaging over the top of a lower. The bottom may comprise wire mesh grids and ventilation holes may be provided in the walls.
Patent GB-297419-A (GB)
IPC: C22B1/02
Filed: 1928-09-04
Abstract: 297,419. Krupp Grusonwerk Akt.- Ges., r. Sept. 21, 1927. [Convention date]. Void [Published under Sect. 91 of the Acts]. Rotary furnaces-In roasting sulphur-containing materials in a rotary tubular furnace, the part of the furnace in which the greatest heat is generated is cooled to prevent sintering of the material. The cooling is effected by Introducing excess of cool air, by injecting water or other liquid, by forming the furnace wall of such thickness that the losses of heat by radiation are increased or by passing cool air through pipes in the furnace or in the lining. The heated air may be passed into the zones where less heat is generated.
Patent GB-350329-A (GB)
Title: Improvements in and relating to mirrors and the method of manufacturing the same
IPC: A45D42/00
Filed: 1930-08-26
Abstract: 350,329. Looking glasses. TOBIN, E., 42, Limes Avenue, Waddon, and TOBIN & CO., Ltd., Stafford Road, both in Croydon, London. Aug. 26, 1930, No. 25453. [Class 52 (iv).] A mirror with bevelled edges having a polygonal plane surface a within a differently shaped boundary b is formed by bevelling a polygonal sheet and subsequently cutting the outer edge to the desired shape. For use as a shaving mirror a light can be placed behind the glass and the silvering omitted from the bevels a<1>; or for decorative effect the bevels can be coloured to contrast with the frame.
Patent GB-1024027-A (GB)
Title: Hydrogen compounds of elements of the third and fourth main groups of the periodic system
IPC: C01B6/00
Filed: 1964-06-19
Abstract: Silicon hydrides containing hydrocarbon or halohydrocarbon groups are prepared by reacting the corresponding halide with an alkali metal hydride in the presence of an alkylmercapto borane, HnB(SR)3- n where R is an alkyl group and n is 0-2, e.g. tris- and bis-(dodecylmercapto)borane.  The examples describe the preparation of mono-, di- and trimethyl silanes from the corresponding chlorides using NaH.ALSO:An alkali metal borohydride is prepared by reacting a boron halide with an alkali metal hydride in the presence of an alkylmercaptoborane, HnB(SR)3-n, where R is alkyl and n is 0-2.  In Example (5), BF3, NaH and tris-(dodecylmercapto)-borane are used.
Patent GB-1218418-A (GB)
Title: Copper-clad plastics panels
IPC: H05K1/03
Filed: 1968-05-28
Abstract: 1,218,418. Laminated metal-resin panels. CINCINNATI MILLING MACHINE CO. 28 May, 1968 [9 June, 1967; 5 March, 1968], No. 25575/68. Heading B5N [Also in Division C3] A panel comprises a copper sheet having bonded thereto a plastics base comprising the reaction product of methylmethacrylate, an unsaturated polyester and an organic epoxide having (i) no. of epoxy groups: molecular weight equal to at least 1: 950, (ii) neither carbon atom of the epoxy group bonded to more than two other carbon atoms, and (iii) the epoxy group being separated from any aromatic ring by at least one carbon atom, the polyester comprising at least 50%, preferably 50-90% of the three components. The plastics material may be reinforced by woven or non-woven glass fibre or synthetic resin fibre mats, or by paper. In manufacture, a reinforcement may be laid on the copper sheet and the reaction mixture applied thereto, or one component may be applied to the sheet or reinforcement prior to applying the other components. The assembly is then heated under pressure, e.g. by heated platens. The plastics material may then be post-cured. The polyester may be a commerciallyavailable polyester or may be made by reaction between glycols and unsaturated dicarboxylic acids: the glycol used may comprise a mixture of C 2 -C 10  glycols and may contain up to 50 wt. per cent of glycols containing an ether linkage, and the unsaturated acids may be mixed with up to 25 wt. per cent of saturated acids. Various commercially available poly esters, glycols and acids are mentioned. A long list of epoxides is mentioned, and the formulµ of preferred epoxides are specified. Catalysts, fillers and fire retarders may be included in the mixture of monomers and polymers.
Patent GB-866215-A (GB)
Title: Improvements in or relating to electrical calculating devices
Inventor: DAVIS CHARLES HOWARD
IPC: G06F7/50
Filed: 1957-08-13
Abstract: 866,215. Multi-stable-state circuits. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Aug. 7, 1958 [Aug. 13, 1957], No. 25590/57. Class 40(6) [Also in Group XIX] An electrical calculating device includes two cascades of resistors fed from separate constantcurrent supplies, a plurality of input means each arranged to raise the potential of the whole of one cascade by an increment of voltage, and to lower the potential of the other cascade correspondingly, and output means for detecting the polarity of the potential difference between selected pairs of points on the cascades. In the circuit shown, negative "1"-representing signals applied to any of input terminals T1-T7 switch over conduction from the left to the right side in an associated double triode V1-V7. Each such switch-over causes an increment of potential to be added at point X and subtracted at point Y, this operation being speeded up by assisted cathode follower circuits V8, V9 and V8<SP>1</SP>, V9<SP>1</SP>. The points X, Y are connected through cascades of resistors as shown to constant current valves V10, V10<SP>1</SP> respectively, whereby for every change in potential at X and Y corresponding changes will be produced at every point in each cascade. Corresponding points in the two cascades are connected to the control grids of long-tailed pairs of pentodes V11, V11  to V17, V17<SP>1</SP>. For zero input, when all the valves V1-V7 are conducting on the left, pentodes V11<SP>1</SP>-V17<SP>1</SP> are conducting. If, however, one of the valves V1-V7 is switched over by a "1" input, the potential applied to the grid of V11 will be higher than that applied to V11<SP>1</SP> so that conduction is switched. Similarly, for two "1" inputs, conduction will be switched in the first two pairs V11, V11<SP>1</SP> and V12, V12<SP>1</SP>, and so on, whereby for seven "1" inputs, all the pentode pairs will be switched over and V11-V17 will conduct. The circuit may be employed in a binary adder (see Group XIX), or for coding (see Group XXXVIII) in which case valves V1-V7 may be weighted by varying the cathode resistances. Specification 717,114 is referred to.
Patent GB-247630-A (GB)
Title: Improvements relating to wearing apparel
IPC: B63C9/093
Filed: 1925-08-26
Abstract: 247,630. Evans, H. H. Aug. 26, 1925. Buoyant garments.-A buoyant suit for airmen &c. is provided with a detachable pouch filled with cellular rubber, the edge of the pouch being furnished with a hollow beaded edge of castellated form which registers with a similarly castellated edge on the suit, the parts being connected by a wire. Specification 11624/11, [Class 70, India-rubber &c.]. is referred to.
Patent GB-1435748-A (GB)
Title: Tyre tread compositions and their production
IPC: C08G18/00
Filed: 1973-05-29
Abstract: 1435748 Tire treads FIRESTONE TIRE & RUBBER CO 29 May 1973 [8 June 1972] 25617/73 Headings C3P and C3R Tire treads comprise one-step reaction products of a polyisocyanate and a polymer containing at least two amino groups selected from (a) polyamino homopolymers of conjugated dienes containing 4 to 6 carbon atoms, (b) polyamino copolymers of such conjugated dienes and aromatic vinyl compounds, (c) polyamino copolymers of such conjugated dienes with vinyl nitriles, (d) polyamino polyethers and polyesters, (e) polyamino polymers of aliphatic olefins and (f) mixtures and reaction products of such polymers with polyhydroxy polymers, and contain at least 30 parts of carbon black, silica or metal oxide as reinforcing pigment per 100 parts by weight of the reaction products, the ratio of NCO/NH 2 , NCO/NHR, NCO/ (OH+NH 2 ) or NCO/(OH+NHR) where R is alkyl or aryl being at least 1À15 and there being at least 25 weight per cent of reaction product in the tread. The treads may also contain a proportion of other elastomers, e.g. rubber or scrap or reclaimed rubber. The reaction with the. polyisocyanate may be catalysed by conventional catalysts, e.g. tin salts and 1,4- diazabicyclo[2,2,2]octane. The compositions may be further cured in the presence of an organic peroxide. Examples describe the preparation of tire stocks from amino terminated polyoxypropylenes, optionally together with hydroxy terminated butadiene/styrene copolymers; toluene diisocyanate or diphenylmethane diisocyanate; and carbon black or silica; dibutyl tin dilaurate as catalyst; 4,4<SP>1</SP>- methylene bis-(2,6-di-t-butylphenol) as antioxidant; and optionally rubber processing oil and N,N-dihydroxypropylaniline.
Patent GB-615729-A (GB)
Title: Improvements in or relating to incubators
IPC: A01K41/00
Filed: 1946-07-16
Abstract: 615,729. Automatic control systems for incubators. HARDY, G. R. July 16, 1946, No. 25652/45. [Class 38 (iv)] [Also in Groups I and XXXVII] An automatic temperature control system for an incubator (see Group I) comprises two sets of electric heaters 88 and 90 controlled by three mercury switches 62, 64, 66. A switch arm 72 has the switch 64 mounted thereon, the switches 62, 66 being mounted adjacent to said arm, switch 66 being normally closed and switch 62 normally open. The switch arm is first operated by a hand-lever 84 which causes switch 62 to close by tilting, thus energizing all the heaters. A temperature-responsive capsule 70 expands on rise of temperature and controls the arm 72 by moving lever 71. When a predetermined temperature is reached, the arm 72 is tilted so that switch 64 is opened, disconnecting heater 88. When a further predetermined temperature is reached, the arm 72 tilts switch 66, disconnecting heater 90. If the temperature still rises, the switch arm makes contact with stop 78, energizing an alarm system. Similarly, if the temperature drops so that arm 72 makes contact with stop 80, the alarm system is again energized. Specification 404,671, [Group I], is referred to.
Patent GB-1261229-A (GB)
Title: Take-up reel for strip material
Inventor: WANGERIN ELMER OSCAR
IPC: G11B15/67
Filed: 1969-05-20
Abstract: 1,261,229. Tape reels. EASTMAN KODAK CO. 20 May, 1969 [20 May, 1968], No. 25682/69. Heading B8M. [Also in Divisions G2-G3] A take-up reel for film or other strip material may selectively receive two or more films of predetermined different widths and comprises a hub 22 and flanges 23, 24 spaced to receive the widest film, and one or more resilient guide members 38a, 38b extending tangentially from the hub whose edges engage and retain the narrower films thereby holding such films against the lower flange 23. Resilient snubber arms 36a, 36b with friction pads 37a, 37b also extend from the hub and engage a film end entering the reel through opening 33 in a cylindrical guide 27 surrounding the reel, the film being wound on to the hub as the reel rotates. The guides 38a, 38b and snubbers are made in bifurcated form, and one or more are wrapped round hub 22 as the film is wound, depending on the width of film.
Patent GB-1317109-A (GB)
Title: Apparatus for making thermoplastics carrier bags
IPC: B29C65/18
Filed: 1971-04-19
Abstract: 1317109 Carrier bags F M C CORP 19 April 1971 [8 April 1970] 25692/71 Heading A4G [Also in Division B5] A thermoplastic web W, Fig. 1 folded along its longitudinal centre line is fed intermittently from a roll WR through creasing rolls 32a - d and web folding devices for folding the longitudinal edges WE, Figs. 2, 3, (not shown) to produce lips having two, (Fig.2) or three, Fig.3 (not shown) web layers, through web tensioning apparatus 36, through carrier bag making apparatus 38 for simultaneously making hand-receiving cut-outs H, Fig. 5, and longitudinal line seals LS in the lips and through a reciprocating seal bar 42 and an intermittently rotating seal roll 44 to produce transverse welds and cuts. The apparatus 38, Fig.6, comprises outwardly biased stripper plates 204, 206 for separating the web lips, stationary heatable seal bars 192, 194 and cutting dies 198 between the plates 204, 206 and reciprocable platens 76, 78 for pressing the lips into contact with the seal bars 192, 194 and cutting dies 198. Platen 76 is driven by a cam 94 through a plunger 72, rocker bars 128 coupling plunger 72 to a plunger 74 on platen 78 to drive the latter, plunger 74 being biased upwardly by a spring 116. The pressure applied by the platens 76, 78 can be adjusted by screws 136, 160. The bag making operation may be interrupted for one cycle after a predetermined bag count, and during interruption for more than one cycle, the seal bars 192, 194 and cutting dies 198 are pivoted 90 degrees out of the web path, the platens 76, 78 are prevented from reciprocating and bar 42 and roll 44 are made inoperative. The seal bars 192, 194 and cutting dies 198 are pivoted by a hydraulic or pneumatic cylinder 184 that causes rotation of a shaft (170), Fig. 12, (not shown) rigid with parts 192, 194, 198 through a rack 190 and a spur gear 174. The platens 76, 78 are prevented from reciprocating by a pneumatic or hydraulic cylinder (222), Figs. 8, 9, (not shown) mounted on a wall (221) of platen 78, a nut (234) on the piston rod (228), when extended, abutting a plate (138) of platen 76. The web portions cut out by the dies 198 are removed by a vacuum motor through passages 249, 241, 257, 251, elbows 243, (253), Fig. 11, (not shown) and hoses 245, (255). In a modification, the dies may produce cut outs H2, H1, Figs.5A, 4A, (not shown) that are retained by tabs (T2, T1) and a line (260), or by a line (274), Fig.4, (not shown). The bag may be locked by passing one of these cut-outs through aperture provided by the other. Specifications 1267720 and 1315154 are referred to.
Patent GB-1098390-A (GB)
Title: Process and apparatus for removing readily condensible impurities from gases
IPC: F25J5/00
Filed: 1966-06-09
Abstract: 1,098,390. Cold separation of gas mixtures. LINDE, A.G. June 9, 1966 [June 10, 1965], No. 25701/66. Addition to 1,044,889. Heading F4P. In a process wherein condensible impurities, e.g. carbon dioxide and water vapour previously deposited in one or other paths 10a, 15 of switchable indirect heat exchangers 12a, 13 of the plate or tube type traversed by feed gas, e.g. air, and being cooled by a reverse flow of cold purified gas in the shell side of the exchangers 12a, 13 are revaporized under a partial vacuum of between 0À05 and 0À5 atmospheres pressure, the reversely flowing cold purified gas is pure nitrogen leaving the head of an air rectification column 31 through a line 11 and a further product, e.g. oxygen, withdrawn from the column 31 through a line 33 is passed through an exclusive path 34 of a further indirect heat exchanger 4 having two switchable paths 3, 7 traversed by counterflowing crude nitrogen withdrawn from column 31 through a line 6 and by a minor portion of feed air withdrawn from a line 1. A third heat exchanger 12b is arranged in parallel with exchangers 12a, 13 and in operation and assuming path 15 of exchanger 13 is to be derimed the cold pure nitrogen flow is stopped by closing a valve 19c, an inlet valve 32c in path 15 is closed and a valve 43 is opened to connect path 15 to a vacuum pump 16 and the crude nitrogen line 6 is connected through valves 17, 18 to the cold end of path 15 to effect scavenging thereof under vacuum.
Patent GB-331131-A (GB)
Title: Improvements in saw blades
IPC: B23D61/02
Filed: 1929-08-23
Abstract: 331,131. Wagner, K. Aug. 23, 1929. Saws. - Saw-blades with inserted teeth are made with recesses 4 separated by ribs of the full thickness of the blade, and the base of each tooth segment 6 is riveted into or over the recess. The common surfaces 8 of adjacent segments may register with the rib as shown, but need not. Several shapes of recess are illustrated.