baber/WOPTO huggingface dataset:
Patent GB-1382652-A (GB)
Title: Open end spinning machines
IPC: D01H4/12
Filed: 1972-03-23
Abstract: 1382652 Spindle drives PLATT INTERNATIONAL Ltd 20 March 1973 [23 March 1972] 13696/72 Heading DID [Also in Division F2] A belt drive for an open end spinning rotor comprises a primary belt 14, two rotatable members 9, 11 and a secondary belt 15 which drives the rotor shaft 2. The primary belt 14 and the two rotatable members 9, 11 are relatively movable so that there can be selective contact between the primary belt 14 and either of the rotatable members and thus the rotor may be driven at a high speed sufficient to spin yarn or at a lower speed to effect piecing up.  As shown, drive to the rotor shaft 2 is transmitted from primary belt 14 via the secondary belt 15 by either of the differently sized lay shafts 10, 12 which drive the secondary belt. Alternatively, the lay shafts could be the same size with pulleys 9, 11 being of different sizes. The drive is selected by a pneumatic ram 16 acting on T-piece 7. The rotatable members 9, 10, 11, 12 and the rotor shaft 2 are mounted on a movable support which can be moved to disengage the primary belt drive and brake the secondary belt via brake pads 19. The secondary belt 15 can be tensioned by mounting one of the rotatable members 9, 10, 11, 12 in spring-loaded bearings.
Patent GB-597340-A (GB)
Title: Improvements in or relating to means for transmitting speech signals in which subdivision of the speech into components is used
IPC: G10L19/02
Filed: 1945-06-01
Abstract: 597,340. Transmission systems. PATELHOLD PATENTVERWERTUNGS- & ELEKTRO-HOLDING AKT.-GES. June 1, 1945, No. 13829. Convention date, June 1, 1944. [Class 40 (iv)] Speech is transmitted by first separating the signal into a number of partial frequency ranges, then dividing the frequency of each of these ranges, combining these results to form a signal for transmission, separating out the components at the receiving end, multiplying their frequency separately to form the original components, and then combining them to form the original speech. Auxiliary signals may be mixed with the components before transmission and these signals then have to be removed at the receiving end. The frequencies for transmission can thus be adjusted to obtain a narrower wave band. Apparatus for carrying out this method of transmission may also be combined with means for scrambling the speech. In one method of carrying out the invention, shown in Fig. 5, each frequency range is separated by a band-pass filter BP, the amplitude is limited in AB and the frequency divided in TE. The resulting signal is fed to a modulator M controlled by a voltage proportional to the amplitude of the original signal and produced by a rectifier G and a low-pass filter TP. The resulting signal therefore has the amplitude of the original signal, but a fraction of its frequency. In the receiving apparatus shown in Fig. 6, the bands are reproduced by filters BP and a signal of constant amplitude but multiplied to the original frequency is produced by the limiter AB and multiplier VE. The modulation product of this and the signal from BP pass through a high-pass filter HP and the original partial band signal is produced. The signals indicating amplitude and frequency may be transmitted separately instead of combined as above.
Patent GB-119101-A (GB)
Title: Improvements in the Manufacture of Refractory Bricks, Blocks, Tuyeres and the like employed in connection with Furnaces for Smelting Metals and for other purposes.
Inventor: MASON HERBERT EVANS
IPC: C04B35/03
Filed: 1917-09-27
Abstract: 119,101. Mason, H. E., and Couper, A. Sept 27, 1917. Refractory substances.-In the manufacture of refractory magnesite bricks a salt or salts of boric and/or perboric acid in conjunction with one or more of the following fluxing agents, basic slag, iron oxide, iron ore, metallic iron or iron slag, is incorporated with a mixing of calcined or raw magnesite and water. The mixture is formed into bricks and fired. Alternatively the fluxing agent or agents and borate &c. are mixed, shaped into brick, calcined, and ground into powder before being mixed with the calcined magnesite. The average proportions in 100 parts of mixing are about one part of borate &c. to about 6 parts of each or any or all of the fluxing agents named.
Patent GB-374594-A (GB)
Title: Process for the manufacture of disulphides from mercapto compounds
IPC: C07D263/60
Filed: 1931-05-11
Abstract: Organic disulphides are prepared by treating mercaptans of the aromatic or heterocyclic series or dithionic acids or dithiocarbamic acids with oxygen or a gas containing oxygen in the presence of nitrous acid or nitric oxides in a neutral or acid medium.  The quantity of nitrous acid or nitric oxides, which act as oxygen carriers, is insufficient to effect oxidation in the absence of free oxygen; generally the addition of 10 per cent or less of the oxygen carrier is sufficient to produce in most cases a smooth, quick oxidation; the speed of reaction can be increased by using larger quantities of oxygen carrier, or by good distribution of air or oxygen, vigorous stirring, increased temperature, &c.  The following substances are oxidized in the presence of nitrous acid by means of air or oxygen:-2-mercaptobenzthiazole to dibenzthiazyl disulphide, 2-mercaptonaphthoxazole (prepared by treating a -nitroso-b -naphthol with sodium hydrosulphide and carbon disulphide) to the disulphide, dimethyldithiocarbamic acid to tetramethylthiuram disulphide (the time of reaction being shortened by working under pressure, if desired), p-thiocresol, obtainable by reducing p-toluenesulphonic acid, to pp<1>-ditolyldisulphide, and potassium xanthogenate to xanthogen disulphide.  Specification 279,790, [Class 2 (iii), Dyes &c.], is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) describes the use of an oxygen carrier generally in the above process, but this subject-matter does not appear in the Specification as accepted.
Patent GB-323442-A (GB)
Title: Improvements in clockwork recording apparatus for pigeon competition flights and the like
IPC: G07C1/26
Filed: 1929-05-04
Abstract: 323,442. Martens, H. May 4, 1929. Portable checking and recording clocks. - In apparatus particularly for timing pigeon flights means are provided to detect any attempt to influence the clockwork by shaking. The means as shown in Figs. 2 and 3, comprises an auxiliary balance, consisting of a lever 4 with weighted arms, mounted on an axle 2 supported in a bracket 1 and maintained in a normal position of rest by means of a spring 7. Each arm of the lever 4 is provided with a curved needle 9 which when the balance is oscillated is caused to penetrate the record-disc 3 rotated by the clockwork, the oscillations being limited bv abutment extensions 11 on the bracket. Instead of a spiral spring two blade springs one on either side of the axle 2 may be provided to maintain the balance in mid-position. The arms of the balance lever are curved so that the ends knock against the cover of the apparatus to produce a noise to mask that of the ordinary clock balance.
Patent GB-707509-A (GB)
Title: Improvements in or relating to machine tools
Inventor: SWANSON FRED ROBERT
IPC: B23Q7/06
Filed: 1952-06-03
Abstract: 707,509. Milling. SUNDSTRAND MACHINE TOOL CO. June 3, 1952, No. 13949/52. Class 83 (3) A machine comprises means for moving a tool-head 13 through a cutting and a reverse stroke, and means 30 on the head for engaging a workpiece beyond the cutting station and moving it to the cutting station B on the reverse stroke. In a milling machine, the cutter and its driving motor 18 are mounted on the head 13 which is reciprocated by a piston 15 attached thereto. The head is moved rapidly up to a workpiece, such as a cylinder head 21 clamped at the cutting station B, and then at a slower speed while cutting takes place. The dogs 30 on the head co-operate to move the workpieces to and from the cutting station. After a cutting-stroke, one dog engages a lug 21<SP>1</SP> on a workpiece at a loading section A and the other engages a similar lug on the finished workpiece. The head then moves back and the dogs tilt slightly (30c) against a spring 55 and allow a switch 58 to actuate an indicator to show that workpieces are being moved. If a workpiece meets an obstruction, the dogs are tilted further (30d) to compress a spring 60 and allow a switch 66 to operate and stop the head. Should the head fail to stop, the dog tilts free of the projection 21<SP>1</SP> (30c) and remains locked in that position. A spring 45 allows the dogs to tilt in the opposite direction (30a) when the head is advanced. The dogs may be locked in an upward position (30b) when the machine is adjusted.
Patent GB-947862-A (GB)
Title: Improvements in thrust bearing
IPC: F16C17/06
Filed: 1960-04-21
Abstract: 947,862. Thrust bearings; lubricating. GENERAL ELECTRIC CO. April 21, 1960 [April 23, 1959 (2)], No. 13995/60. Heading F2A. In a water lubricated thrust bearing assembly the bearing pads are spring-urged towards the thrust plate to maintain a fine clearance. The bearing assembly comprises a thrust plate 36 secured to a rotating shaft 34 by a nut 38, a bearing element on each side of the plate formed by pivoted rockers 44, and shoes 46, the latter carrying segmental carbon pads 48. The rocker of the upper bearing carries a ring 52 dowelled to a plate 56 at 54, a wave spring 64 located in a groove in the ring to form unequal clearances 76, 78, which take up radial expansion and contraction of the spring, and the bearing is sealed by a metallic seal 68 welded to the plate 56 and the stator housing 28, at 70 and 72. The thrust on the bearing is taken by a cap 42 secured to the housing 28. The lower bearing is similar to the upper bearing but the bearing is sealed by a washer 84 urged by a wave spring 66 and the thrust is taken by a shoulder on the housing 28. A clearance 51 is maintained in the bearing which is unloaded, by springs 64, 66, and the faces of the pads are shaped, e.g. conically,cylindrically &c. so that the water pressure is progressively increased from the leading edge to the centre of the pads. To maintain the clearance 51, springs 64, 66, may be replaced by sets of coil springs, or by pressure actuated pistons.
Patent GB-378463-A (GB)
Title: Improvements relating to the concentration of dilute acetic acid or liquor containing same
IPC: C07C51/42
Filed: 1931-05-12
Abstract: Dilute acetic acid such as vinegar is concentrated by passing the pre-cooled solution through a heat exchanger at a sufficient speed and rate of heat exchange to cause the formation of ice crystals which are carried along by the liquid stream and separated.  The crystals are washed with some of the initial solution and may then be mixed with alcohol, the mixture being used to pre-cool the solution, and afterwards being returned to the vinegar plant so as to supply the alcohol and a part of the water needed for the process while saving the remaining acetic acid.  In an example, the concentration of 10 per cent vinegar is effected by passing the solution, pre-cooled to -2 DEG  C. through a heat exchanger at 3 feet per second, the heat transfer being 500-1000 calories per square metre of cooling surface per hour. To control or limit the rate of cooling, the cooling surfaces may be coated with material of low conductivity such as rubber or enamel.  More than one heat exchanger may be used; for instance the first may cool the liquor to -5 DEG  C. and the second to -15 DEG  C. giving a vinegar of 40 per cent.
Patent GB-783256-A (GB)
Title: Centrifugal separator
IPC: B04B1/12
Filed: 1956-05-07
Abstract: 783,256. Centrifugal separators. AKTIEBOLAGET SEPARATOR. May 7, 1956 [Sept. 22, 1955], No. 14050/56. Class 23 In a separator comprising a rotor 5 enclosing conical liners 3, 4, liquid from the inner edges of the liners is led to a chamber 12 having means for discharge of liquid from the rotor. As shown the discharge means is a skimming device 21, but the means may comprise a duct leading from the chamber to an overflow outlet. Liquid to be separated enters the chamber through the inlet 1 and passes between the liners to the separating chamber 7. Sludge is discharged through outlets 6. Some of the sludge, or an auxiliary liquid, passes through a bore 24, chamber 25, and tubes 26 to discharge into the separating chamber adjacent the outlets 6. When the rotor is stopped liquid drains through outlets 19.
Patent GB-894569-A (GB)
Title: A device for compensating axial astigmatism of electron lenses
IPC: H01J37/153
Filed: 1959-04-24
Abstract: 894,569. Electron miscroscopes. TESLA, NARODNI PODNIK. April 24, 1959 [April 24, 1958], No. 14052/59. Class 39 (1). Astigmatism in the objective lens 1, 2 of an electron microscope is corrected by a 4-pole stigmator 3 which is disposed outside the vacuum space and which is mechanically displaceable in a plane perpendicular to the axis of the lens. The stigmator is excited by field windings 4 through which adjustable direct current is passed. An alternating current may also be passed to enable centering of the field of the system. The stigmator is also mechanically rotatable. The stigmator may be disposed between the pole-pieces of the objective.
Patent GB-1140865-A (GB)
Title: Improvements in and relating to telescopic hydraulic supports
Inventor: EYRE IVAN DAVID
IPC: A47C3/30
Filed: 1965-04-03
Abstract: 1,140,865. Linkwork. ARMSTRONG PATENTS CO. Ltd. 28 Feb., 1966 [3 April, 1965], No. 14222/65. Heading F2K. [Also in Division A4] A telescopic hydraulic support comprises an inner cylinder 16, attached at its upper end to a spigot 10 and at its lower end to a radial flange 28 containing a spring-loaded ball valve 32, and an outer cylinder 20 having at its upper end seals 24 engaging the exterior of cylinder 16 and being attached at its lower end to a spigot 12. In the fully extended condition, the lower cylinder 20 is completely filled with oil, and air in the upper cylinder 16 constitutes a pneumatic spring 54. To vary the length of the support, ball valve 32 is opened by operation of a rod 38 by means of a slidable control sleeve 46.
Patent GB-1241601-A (GB)
Title: Anthraquinone compounds
Inventor: GREENHALGH COLIN WILLIAM
IPC: B29D30/66
Filed: 1968-03-25
Abstract: 1,241,601. Anthraquinone compounds. IMPERIAL CHEMICAL INDUSTRIES Ltd. 27 Feb., 1969 [25 March, 1968], No. 14271/68. Heading C2C. The invention comprises compounds of the formula where Y is Cl or Br and the anthraquinone nucleus may contain further substituents. The compounds are prepared by reacting the corresponding hydroxymethyl compounds with a chlorinating or brominating agent, e.g. thionyl chloride or bromide or hydrogen chloride or bromide.
Patent GB-790479-A (GB)
Title: Frequency correcting arrangements
IPC: H04J1/06
Filed: 1954-05-18
Abstract: 790,479. Multiplex systems. AUTOMATIC ELECTRIC LABORATORIES, Inc. May 18, 1954 [May 29, 1953], No. 14562/54. Class 40 (4). In a carrier system, a pair of in-band pilot currents introduced at the transmitter and received at the transmitter and received in .selective parallel circuits are modulated on each other to produce a current lying outside the transmitted band and the intelligence band is modulated therewith to produce a band in which frequency errors arising from transmission are substantially cancelled. In the system, Fig. 2, which uses a carrier frequency of 304 Kc/s and pilot currents of 44 and 88 Kc/s, the received pilot frequencies 216+ error (d) and 260+ error (d) are selected by filters 271, 2711 and applied to the modulator 41. Modulation product 2(260+d)-(216+d)= 304+d is selected and is modulated with the whole received signal (164+d-264+d) in modulator 371 to reproduce a 40-140 Kc/s supergroup.
Patent GB-785117-A (GB)
Title: Improvements in or relating to fibre-drafting elements
IPC: C08K3/22
Filed: 1954-05-18
Abstract: A fibre drafting element is composed of pulverized butadiene-acrylonitrile copolymer or polychloroprene rendered water absorbent by the addition of one or more water-insoluble hydrophilic inorganic materials.  Specified materials are precipitated aluminium or calcium silicates, precipitated aluminium oxide, activated alumina and bentonite clay.  The hydrophilic material may be added in the proportion of 100 or more parts per 100 synthetic rubber, preferably less than 150 parts, and the composition may contain a wetting agent.
Patent GB-183966-A (GB)
Title: Improved spring clips for holding removable articles as mats, seating, boxes to their base or floor
IPC: A47G27/04
Filed: 1921-05-26
Abstract: 183,966. Searls, C. M. May 26, 1921. Petrol and like cans, detachably securing.-In Petrol and like cans, detachably securing.-In a device for securing oil &c. containers to a base comprising a plate a soldered, welded &c. to the article and formed at one end with a hook a' and at the other end with guides a<2> for the sliding hooked plate b, projections on a crossbar c on the plate a are connected by rubber bands d to projections b<2> on the plate b. To apply the device, the hook b<1> is hooked into a loop in the base and the plate a pulled in the direction of the arrow so as to engage the hook a' in a second loop in the base. By cutting away the plates a, b at e, f and riveting a cross-bar g to the plate b, an additional central rubber band may be employed.
Patent GB-1006133-A (GB)
Title: Tetracycline compounds
Inventor: SCOTT ALASTAIR IAN
IPC: C07C409/40
Filed: 1962-04-16
Abstract: Hydroperoxy-dehydrotetracycline compounds of the general formula <FORM:1006133/C2/1> in which R1 represents a hydrogen, chlorine or bromine atom, R2 represents a hydrogen atom or a methyl group, R3 represents a hydrogen atom or, when R1 represents a hydrogen atom, a hydroxy group, R4 represents a hydrogen atom or a dimethylamino group and R5 represents a hydrogen atom or a hydroxy group, and in which the dotted lines represent the alternatives of a double bond in the 5, 5a, or 5a, 11a positions may be prepared by oxidation of the corresponding anhydrotetracycline.  Oxidation is preferably effected in solution in an inert solvent by means of molecular oxygen with the aid of irradiation by light.  The hydroperoxy derivatives may be reduced to the corresponding dehydro-tetracycline compounds, e.g. by treatment with an aqueous solution of an alkali metal sulphite or by catalytic hydrogenation.
Patent GB-374237-A (GB)
Title: A new or improved lens mount for photographic cameras and the like
IPC: G03B3/02
Filed: 1931-05-18
Abstract: 374,237. Lens mounts. VINTEN, W., of Vinten, Ltd., North Circular Road, Cricklewood, London. May 18, 1931, No. 14656. [Class 97 (i).] In a focusing lens mount for a camera &c., means for imparting a longitudinal movement, unaccompanied b y rotary movement, to the lens by rotation of the focusing ring, comprises a tubular sleeve d, having an inturned flange f forming a housing for the lens, the sleeve being mounted on the iris shutter sleeve a and provided with a flange e adjacent the collar b. An externally-threaded sleeve k is rotatably mounted on the sleeve d between the flange e and a collar h and is fixed to the focusing ring m by a screw n. The sleeve k engages in internal threads in a tubular member p which fits round the rearward part of the sleeve d and is secured to the camera. Rotation of the sleeve d is prevented by a key q carried by the member p entering a slot g in the sleeve. The focusing scale is marked on a flange o extending from the ring m, the zero line being marked on the part r.
Patent GB-383902-A (GB)
Title: Improvements in teeth cleaning appliances
IPC: A61C15/04
Filed: 1932-05-24
Abstract: 383,902. Toothbrushes. AKI, S., Summit, Bittacy Park Avenue, Mill Hill, London. May 24, 1932, No. 14657. [Class 19.] The handle of a toothbrush A is provided at the end with a forked or U-shaped portion the outer ends of the limbs B of which are provided with tapering inclined notches C for the purpose of detachably securing a strip of dental floss or similar tooth-cleaning material.
Patent GB-238656-A (GB)
Title: Improvements in or relating to presses for fixing ferrules in railway chairs
IPC: E01B31/26
Filed: 1924-06-18
Abstract: 238,656. Greenwood & Batley, Ltd., and Barker, J. H. June 18, 1924. Presses, mechanical.-A press for fixing wooden ferrules in railway chairs comprises a two-part framework furnished with a yielding table to support the chair, a crosshead carrying a spring- controlled tool carrier and a reciprocating bar feed for positioning the chair within the press. The lower frame portion 1 is secured by bolts 12 to, and supports, the upper portion which comprises a pair of side members 2 united at the top by a cross member 6 and at the bottom by a table portion 5. Within the portion 5 slides a hollow boss 69 carrying the table 83, the boss being supported through a roller 71 by a lever 73 carrying an adjustable weight 76. A crank shaft 19 mounted in the upper portion of the framework- 2 is connected by a rod 43 to a crosshead 45 upon which is mounted by spring bolts 52 a carrier 58 for the tools 59 secured in place by set screws 61. The members 2 are gapped at 22 for the passage of the crank shaft 19 which is supported in bearings 16 comprising upper members integral with the frame 2 and lower members adjustable by screws 23 on blocks 24. The crosshead 45 is guided by bushings housed in the numbers 2 and adjustable by screws 8. Motion is imparted to the shaft 19 from a drive shaft 21 through gears 28, 29, countershaft 20 and gears 30, 31. A bracket 102 secured to the lower framing 1 carries a series of rollers 105 aligned with the table 83 upon which a chair 63 loaded with ferrules 62 is placed by hand. The chair is positioned upon the table 83 by a pair of bars 95 connected to sectors 89 secured to a sleeve mounted on a shaft 87 under the influence of weights 93. The outward movement of the bars is effected through a crank pin 103 on the gear 31 and rod 111 which passes loosely through a trunnion 112 on a lever 114 secured to the sleeve of the sectors, the rod 111 being furnished with adjustable nuts 115 which engage the lever 114 in one direction only. Cams 121, associated with trip levers 124, co-operate with rollers 96 on the ends of the bars 95 to lift them on the outward movement so that they drop behind a chair. Projections depending from brackets on the bars 95 engage the chair, the rollers 105 being recessed and the table 83 slotted at 107 to accommodate such projections.
Patent GB-1010533-A (GB)
Title: Binding agent, particularly for constructional purposes
IPC: C04B28/22
Filed: 1964-04-09
Abstract: Cement is produced by grinding blast furnace slag to a specific surface area of at least 4000 cm2/g.  (Blaine) mixing with lime and regrinding. Gypsum may also be added to the slag.
Patent GB-313289-A (GB)
Title: Improvements in or relating to commutators for dynamo-electric machines
IPC: H01R39/04
Filed: 1928-05-19
Abstract: 313,289. Edmondson, R., and Associated Electrical Industries, Ltd. May 19, 1928. Commutators. - The commutator - segments 10 are secured by clamping rings 11 each having a conical face engaging with the segments and a second conical face engaging with a curved or conical face on a ring 16 which is pressed against the ring 11 by bolts 17 and screws, the arrangements being such that the resultant of the pressures on the conical faces lies in or near the median plane on the ring 11 as indicated. In a modification one of its rings 16 is integral with the commutator spindle and the other is screwed on to it, the bolts 17 being dispensed with.