baber/WOPTO huggingface dataset:
Patent GB-1509547-A (GB)
Title: Tetracycline derivatives and process for preparing them
IPC: C07D319/06
Filed: 1975-04-14
Abstract: 1509547 Tetracyclines HOECHST AG 14 April 1975 [13 April 1974] 15206/75 Heading C2C Novel tetracyclines of the general formula wherein each of R<SP>1</SP> and R<SP>2</SP> is a C 1-5  alkyl group or R<SP>1</SP> and R<SP>2</SP> together form an ethylene or propylene group, each of R<SP>3</SP> and R<SP>4</SP> is a hydrogen atom, a C 5-7  cycloalkyl group, a C 1-6  alkyl group, optionally substituted by at least one substituent selected from hydroxyl, di-C 1-4  alkylamino, di-C 1-4  alkylcarbamoyl, C 1-4  alkoxycarbonyl, phenyl, heterocyclyl and carboxy groups, and if substituted by a carboxyl group, optionally also substituted by an amino group, which may itself be substituted by or R<SP>3</SP>R<SP>4</SP>N- is a 5- or 6-membered heterocyclic ring, optionally including an oxygen or an additional nitrogen atom and optionally substituted by a C 1-4  alkyl, C 1-4  hydroxyalkyl, carboxy-C 1-4  alkyl, hydroxyl or carboxy radical, each of R<SP>5</SP> and R<SP>6</SP> is a hydrogen atom or hydroxyl group, R<SP>7</SP> is a hydrogen atom or methyl group, or R<SP>6</SP> and R<SP>7</SP> together form a methylene group, and R<SP>8</SP> is a hydrogen, chlorine or bromine atom or a di-C 1-4  alkylamine group, and acid addition salts thereof are prepared by reacting, in any order, a tetracycline of the general formula or a salt thereof with an aldehyde of the general formula R<SP>1</SP>O-CH(OR<SP>2</SP>)-CHO and a compound of the general formula R<SP>3</SP>R<SP>4</SP>NH or a salt thereof, followed optionally by salification of the product. The tetracyclines may be included in pharmaceutical compositions as the antibacterially active ingredient. Other active ingredients such as penicillins, sulphonamides, gentamycin and chloramphenicol may also be included.
Patent GB-1414445-A (GB)
Title: Agents for disinfecting stalls
IPC: C11D3/43
Filed: 1974-04-05
Abstract: 1414445 Disinfecting animal stalls HENKEL & CIE GmbH 5 April 1974 [6 April 1973] 15208/74 Heading A5E Animal stalls are disinfected by an agent which comprises a phenolic disinfectant dissolved in a mixture of perchloroethylene and a monohydric alcohol having 2 to 4 carbon atoms. The disinfectants used in the examples are p-chloro-m-cresol and o-phenylphenol The preferred alcohol is isopropenol. A wetting agent such as sodium alkylbenzene sulphonate is optionally added. The agent is effective against maw-worm eggs and coccidiae.
Patent GB-123340-A (GB)
Title: Improvements in or relating to Metal Keeper Rings or Packing Rings such as are used in conjunction with Obturator Rings.
Inventor: HECHT JOHN SEBASTIAN
IPC: F16J9/06
Filed: 1917-10-19
Abstract: 123,340. Hecht, J. S., and Dowdell, A. T. Oct. 19, 1917. Piston packing. - The inner flange of a thin flexible metal packing of cup-leather type e is pressed against the side of the piston groove by spring pressure. A helical spring may be employed made either from wire or from a flat metal strip. The ring is caused to exert axial pressure, either by twisting it, or by distorting it to the section shown in Fig. 4. Fig. 5 shows a modified form of spring 1 acting on the flange of a packing-ring 6. The ring may be of rectangular or oval section. A wave spring made from a flat metal strip may be employed acting either directly on the flange of the packing-ring or on a keeper ring. Fig. 12 shows a wire wave spring 8 lying in a recess in a keeper ring 5 which is pressed on to the flange of the packing-ring 6. Alternatively, the keeper ring may have pockets containing spiral springs, or spiral springs 12 may be confined between two rings 5<a>, 5<b>, as shown in Fig. 16.
Patent GB-634073-A (GB)
Title: Process for the preparation of local anaesthetics
IPC: C07D295/18
Filed: 1944-08-10
Abstract: Anilides of the general formula <FORM:0634073/IV (b)/1> wherein R1 and R5 and at least one of R2, R3 and R4 (especially R3) represent acyclic hydrocarbon residues and the rest hydrogen, X represents a mono- or di-substituted amino group and m and n are whole numbers, m being greater than or equal to n, are manufactured by condensing a phenylamine, substituted in the 2- and 6-positions and at least one other position by an acylic hydrocarbon residue, or a salt thereof, with an aminoalkylcarboxylic acid containing the group or groups X, or an alkyl ester or amide thereof, or with a halogenated alkylcarboxylic acid, or an anhydride, halide or amide thereof, followed in the latter case by further condensation with a primary or secondary amine.  The condensation of the phenylamines or their hydrohalides with halogenated alkylcarboxylic acids or their derivatives, and the treatment of the products with amines, may be effected under the conditions set out in Specification 634,072.  The products are useful as local anaesthetics, preferably after conversion into their salts with organic or inorganic acids, e.g. tartaric, citric or especially hydrochloric acid.  Examples illustrate various features of the invention, using the following starting materials : 2 : 4 - dimethyl - 6 - ethyl -, 2 : 4 : 6-trimethyl- and 2 : 6-diethyl-4-methylaniline; the hydrochlorides of 2 : 3 : 4 : 5 : 6-pentamethyl- and 2 : 3 : 6 - trimethyl - aniline; N-allylaminoacetic acid, b -(N-diethylamino)-aminoacetic acid amide; chloracetyl chloride, b -chloropropionyl chloride, a -bromopropionyl bromide, chloracetic acid, chloracetamide, chloracetic anhydride and a  : b -dibromopropionyl chloride; diethylamine, dimethylamine and n- or iso-butylamine.  Additional amines specified for use in the second of the alternative processes are methylamine, allylamine cyclohexylamine,  1 : 2 : 3 : 4 - tetrahydro - 2 - naphthylamine, benzylamine, piperidine and 1 : 2 : 3 : 4-tetrahydroisoquinoline.  N - Dibenzylaminoacetic acid amide is prepared by refluxing ethyl chloracetate with dibenzylamine in benzene, and treating the resulting N-dibenzylaminoacetic ester with ammonia in alcohol.
Patent GB-211638-A (GB)
Title: Improvements in fluid pressure engines
IPC: F01K25/00
Filed: 1920-06-07
Abstract: 211,638. Muntz, W. E. June 7, 1920. Engines working on special systems.-In reciprocating or rotary engines or turbines the steam supply is intermittently cut off so that a rapid succession of impulses is imparted to the piston during each stroke or to each vane during each revolution. As applied to a reciprocating engine, a spigot cock 6 driven by a chain 8 from some rotating part of the engine, is interposed between the piston valve 3 controlling the steam supply, and the cylinder 11. The cock may be in two parts 6', 16 seated by a spring 20, and driven in opposite directions, as shown in Fig. 4. In the application to a turbine, the cock is driven at a speed such that each blade receives several impulses during its passage past the steam-inlet port, which is of a width to direct the steam simultaneously on to a number of blades.
Patent GB-824041-A (GB)
Title: Improvements in and relating to tape speed control in apparatus for recording signals on magnetic tape
Inventor: WOOD CHARLES BARRINGTON BISHOP
IPC: G11B15/52
Filed: 1957-05-14
Abstract: 824,041. Magnetic recording apparatus. BRITISH BROADCASTING CORPORATION. May 14, 1958 [May 14, 1957], No. 15324/57. Class 40 (2). [Also in Group XXXV] Apparatus for controlling the velocity of a magnetic tape, particularly one carrying television signals, comprises a recording head 11 which applies information signals and synchronizing pulses, a separator 17 which extracts the synchronizing pulses, a reproducing head 12 which picks up the recorded signals and pulses, a separator 18 which extracts the recorded synchronizing pulses, and a discriminator 19 which generates a difference voltage dependent on relative phase displacement of the pulses from the separators to control the speed of the tape driving motor 15. For replay, the synchronizing pulses from the reproducing head may be compared with pulses generated by a master wave form generator. For more accurate control the line synchronizing pulses may be utilized and the two heads separated by the minimum practical number of line spacings.
Patent GB-659081-A (GB)
Title: Process for the manufacture of separators for lead accumulators
IPC: H01M50/414
Filed: 1948-06-07
Abstract: Separators for lead accumulators are made by mixing wood or dried wood extract with a synthetic resin powder and introducing the mixture into an atmosphere containing the vapour of a solvent for the synthetic resin until synthetic resin grains have become sufficiently sticky to make it possible to roll out the mixture to form a coherent plate.  In an example, finely-ground wood may be impregnated with a 1 per cent solution of polystyrene in benzene, or polyvinyl chloride in methylene chloride, and the mass dried and reground after which it is mixed with a slightly coarser powder of the same material and then treated in an atmosphere of the solvent and rolled into a plate. Silicic acid gel impregnated with wood extract may replace the solid extract.  The process may be effected continuously and the powdered mixture may be strewn upon a porous layer of the synthetic resin fabric.  A liquid which forms a thin lyophobic layer between the rolls and the powder may be added to prevent sticking.ALSO:Separators for lead accumulators are made by mixing wood or dried wood extract with a synthetic resin powder and introducing the mixture into an atmosphere containing the vapour of a solvent for the synthetic resin until synthetic resin grains have become sufficiently sticky to make it possible to roll out the mixture to form a coherent plate.  In an example, finely ground wood may be impregnated with a 1 per cent solution of polystyrene in benzene, or polyvinyl chloride in methylene chloride, and the mass dried and reground after which it is mixed with a slightly coarser powder of the same material and then treated in an atmosphere of the solvent and rolled into a plate. Silicic acid gel impregnated with wood extract may replace the solid extract.  The process may be effected continuously and the powdered mixture may be strewn upon a porous layer of the synthetic resin fabric.  A liquid which forms a thin lyophobic layer between the rolls and the powder may be added to prevent sticking.
Patent GB-544653-A (GB)
Title: Improvements in door operating system
IPC: E05F15/04
Filed: 1940-10-18
Abstract: 544,653. Door-operating appliances. NATIONAL PNEUMATIC CO. Oct. 18, 1940, No. 15444. Convention date, Oct. 17, 1939. [Class 65 (i)] [Also in Group XXVI] Apparatus for operating two doors simultaneously comprises two shafts 4, 4<1> on the doors connected by cranks 5, 6 and rods 9, 10 to the piston 14 and cylinder 12 of a fluid-pressure engine, so that when fluid is admitted to either end by the ports 15 or 16, the piston and cylinder move in opposite directions to move the doors. To ensure synchronism, the cylinder carries a pin 24 engaging the forked end of a lever 26 pivoted on a fixed pin 27 and connected by a link 30 to the arm 5 at 31. The piston has three flexible packing rings, the outer ones of which have internal grooves 20 exposed to the fluid pressure through ports 21 or 22. The rod 9 has a packing ring 17 with an external groove exposed to the pressure fluid through ports 19. In another form, the cylinder 12 is pivoted on a fixed pin, and the two shafts 4, 4' are connected by links to the piston.
Patent GB-1235892-A (GB)
Title: Electrodeposition of aluminium
IPC: C25D3/44
Filed: 1968-04-01
Abstract: 1,235,892. 892. Electro-deposition of aluminium. NISSHIN STEEL CO. Ltd. April 1, 1968 [April 7, 1967], No.15544/68. Heading C7B. Aluminium is cathodically deposited from a bath comprising at least one aluminium halide and lithium hydride and/or lithium aluminium hydride as solutes and tetrahydrofuran and/or at least one substituted derivative thereof as solvent, the aluminium values concentration in the bath being at least 0À7 mole per litre and the ratio n relating the solutes being determined by the equation where X = the number of moles of aluminium halide, Y = the number of moles of lithium aluminium hydride, and Z = the number of moles of lithium hydride, and the value of n is from 1 to 3. The bath solvent may further comprise 10 to 40% by volume of at least one aromatic compound and may further comprise at least one chain ether in a volumetric amount not exceeding that of the tetrahydrofuran and/or derivative thereof, in which case the aromatic compound forms from 5 to 50% of the bath by volume, the ratio of aromatic compound to ether being 0À8 to 5 by volume. The tetrahydrofuran derivatives typically are methyl, chloro and bromo derivatives, the aluminium halide is the chloride although the bromide or iodide or mixtures of halides may be used, the aromatic compound is benzene, toluene, or dichlorobenzene, the ether is ethyl ether, n-propyl ether, n-butyl ether, isopropyl ether, phenol methyl ether or ethyl phenyl ether. If polyvinyl chloride or 1:2- dichloroethane is included in the bath glossy deposits are obtained.
Patent GB-481841-A (GB)
Title: Common wave radio transmitting systems
IPC: H04H20/67
Filed: 1937-06-04
Abstract: 481,841. Wireless transmitting systems. STANDARD TELEPHONES & CABLES, Ltd. June 4, 1937, No. 15547. Convention date, July 10, 1936. [Class 40 (v)] A plurality of stations arranged to broadcast the same signal on the same radio frequency are controlled by modulating a wave of the desired radio frequency with the signal and heterodyning it with a wave produced from a low-frequency wave. The resultant frequency together with the low frequency are transmitted to the stations where they are utilized to produce the desired modulated common frequency. At the master control station A the carrier f is generated at 1 and modulated at 4 with speech from 3, the filter 5 selecting the sidebands fŒs for radiation from aerial 8. A low frequency f such as 5000 cycles is generated at 2 and raised in frequency to f2 by the harmonic generator and filter 9, 10. The radio sidebands are modulated by f2 at 11 and the lower sideband f-f2Œs selected by filter 12 for transmission, together with frequency f1 from filter 14, to the controlled stations B, C. At B, f 1 is separated by filter 18 and raised in frequency (as at station A) by harmonic generator 20 and filter 21 to f 2 and is then modulated at 19 on to the other line frequency to give rise to the frequencies fŒs which are amplified and radiated by aerial 24.
Patent GB-1334487-A (GB)
Title: Phosphorus removal from phosphorus-bearing liquors
IPC: C02F1/52
Filed: 1972-04-05
Abstract: 1334487 Removing phosphorus from liquids ENVIROTECH CORP 5 April 1972 [5 April 1971] 15630/72 Heading C1C In a system for reducing the phosphorus content of a liquor the liquor is passed through at least a first zone and a second zone, a chemical is added to the second zone to form a phosphorus-containing adsorptive sludge which sludge is passed to the first zone to remove phosphorus from the liquor in that zone, and the liquor being passed from the first to the second zone is substantially sludge free. The adsorptive sludge may be concentrated prior to entering the first zone. Waste sludge may be removed from the first zone at a rate equal to the rate of flow of sludge thereto. The rate of sludge flow to the first zone and the rate of chemical addition may be controlled by means dependent on means sensing the rate of flow of liquor to the first zone and the phosphorus contents in the influent to the first zone and the effluent from the second zone. The chemical may be a salt of Al, Fe, Cu, Co, Ni, Si, Pb, Sn and Zn, preferably FeCl 3 , Al 2 (SO 4 ) 3  or alum.
Patent GB-357562-A (GB)
Title: An improved mill for grinding or reducing chocolate or other material
IPC: B02C7/08
Filed: 1930-05-21
Abstract: 357,562. Disc mills. SONSTHAGEN, A., 10, Broad Walk, Snaresbrook, London. May 21, 1930, No. 15646. [Class 59.] A mill for grinding chocolate &c. comprises concentrically mounted, positively driven, revoluble grinding elements rotating in the same direction at a speed determined by formulµ given in the Specification so as to cause a powerful centrifugal action to be exerted on the material, with or without means whereby adjustment of the speed of the elements may be effected during the Dinning of the mill. The discs 7, 8 which may vary in size are mounted on a sleeve 6 and shaft 3 respectively and are driven in the same direction but at different speeds. The sleeve 6 is driven bv bevel wheels 26a, 27 and the shaft 3 by sun-and-planet wheels comprising a disc 32 on the shaft carrying wheels 33 in gear with a wheel 35 on a driven shaft 36 and with an annular toothed disc 34 fixed to the sleeve 6. The driven shaft 36 is rotated by a worm and worm wheel 38, 37 and the drive may be transmitted through a change-speed gear 40. Both discs are driven by chain and sprocket wheels from a motor 15. The sun-and-planet gear may be dispensed with and the shaft 3 be driven bv a pair of bevel wheels. The disc 7 is provided with a peripheral tray 24 on which the ground material is heated or cooled as it is thrown outwards into a collecting trough 25. The material to be ground is fed through the upper disc by a pipe 26 and enters a tube b secured to a spider attached to the top of the shaft 3. The upper disc 8 is pressed on to the lower disc 7 by a spring d the compression of which is regulated by a nut c. The recess in the upper disc for the reception of a batch of the material to be ground may be provided with a perforated grating 48, Fig. 5, so that the material is subjected to a preliminary coarse grinding before passing between the discs. The grating may be dispensed with. Floating discs may be interposed between the upper and lower discs and the spacing between the discs may be made adjustable. The ground material may be returned to the mill for further grinding or the material may pass successively through a series of pairs of discs. The discs may be disposed in a vertical or inclined plane. Openings may be made in the upper stone for the release of any gases generated during grinding and grooves or channels extending toward the periphery and of such depth that they do not become filled with material may be provided for the same purpose.
Patent GB-999867-A (GB)
Title: Slip coupling
IPC: F16D7/02
Filed: 1964-04-15
Abstract: 999,867. Slip couplings. ROBERTSHAW CONTROLS CO. April 15, 1964 [June 7, 1963], No. 15664/64. Heading F2U. An overload slip coupling in a timing mechanism or meter comprises a driving member 10 fast on a knurled portion of a shaft 16 and carrying, freely rotatable on an integral hub 22, a driven member 30 which is urged into frictional engagement with the driving member 10 by a leaf spring 44 axially retained in a groove 58 on the shaft and having dimpled ends 56 which radially locate the spring in an annular recess 36 in the driven member 30. The spring 44 is rotationally located in a slot 24 of the driving member 10 and is formed with a keyhole type slot 48 permitting quick replacement of the spring for varying the spring rate, and hence slip load, and facilitating assembly of the unit.
Patent GB-1249236-A (GB)
Title: Improvements in means for winding materials at constant and variable tension and linear velocity
Inventor: NORTON JOHN
IPC: D03D49/20
Filed: 1969-03-26
Abstract: 1,249,236. Feeding webs. WILSON &  LONGBOTTOM Ltd. 25 March, 1970 [26  March, 1969], No. 15705/69. Heading B8R.  [Also in Divisions D1, F2 and G3]  A winding machine for winding rolls 66,  Fig. 3, of yarns or fabric employs a positively infinitely variable gear G of the belt and  expanding pulley type, Fig. 1 (not shown), the regulating force on the control lever 30 of the  gear G being provided by a pneumatic or  hydraulic piston and cylinder unit 40. The  yarns or fabric pass over a tension roller 76 suspended from an electrical tension-measuring  device 80, the signals from which are fed to potentiometric control unit 84 with a pointer 90 indicating the tension and setting pointers 92 indicating upper and lower acceptable tension limits. Output signals from the unit 84 are fed to a fluid pressure control device 94 controlling the supply of pressurized fluid from a pump 96 to the cylinder 40. If the tension falls below or rises above the limit set by pointers 92, fluid at appropriate pressure is supplied to or exhausted from cylinder 40 to increase or decrease the force on control lever G, thereby increasing or decreasing the linear surface velocity of the roll 66 and restoring the tension to the desired range. If it is desired to wind at varying tension, a unit 84 is employed in which the setting pointers 92 progressively move along the calibrated tension scale as winding progresses. In an alternative arrangement, the unit 84 is omitted and regulating means are provided on cylinder 40 to maintain a constant pressure.
Patent GB-613987-A (GB)
Title: Improvements in protection devices for the guideways of lathes and like machine tools
IPC: F16C29/08
Filed: 1945-06-20
Abstract: 613,987. Grinding and polishing. PROGRES INDUSTRIEL SOC. ANON. June 20, 1045, No. 15722. Convention date, March 11, 1940. [Class 60] [Also in Group XXII] A protection device for the guideways of grinding and like machine tools of the kind in which metallic coverplates extending the length of the bed project into a slot provided in a carriage and are fixed at the interior of the bed forming a pair of angularly disposed faces substantially parallel to the faces of the guideways is characterized in that the coverplates extend upwardly and outwardly into a curved slot in the carriage. The covers 3 extend the full length of the bed 2 and are secured by bolts 4 at spaced intervals along its length to projecting lugs on the inside of the bed. Gaps between the lugs allow foreign matter to fall through to the inside of the bed. The covers are of such rigidity and thickness as to protect the guideways against damage through bodies falling thereon.
Patent GB-168983-A (GB)
Title: Improvements in change-speed mechanism
IPC: F16H63/18
Filed: 1920-06-10
Abstract: 168,983. Hupp, I. June 10, 1920. Variable-speed toothed gearing comprises clutches movable together in pairs, one of each pair sliding on a countershaft 14, Fig. 1, and the other upon a driving-shaft 12 or driven shaft 13, the whole being operated by a sliding cam bar 37, Figs. 2 and 3. Gears 26, 39, 45, 58, 70 loose on the shaft 14 mesh respectively with gears 21, 38, 44 loose on the shaft 12, and with gears 54, 68 loose on the shaft 13, the pair 70, 68 being connected through an idler 74 for reversing,. Helical teeth are preferably employed. A double clutch 33 between the gears 21, 38 and a like clutch 34 between the gears 26, 39 are -operated together by a transverse spindle 30. A double clutch 52 between the gear 44 and a clutch 17 on the shaft 13 for direct driving is operated together with a single clutch 53 beside the gear 45 by a like spindle 48. Other double clutches 66, 67 a.re operated by a third spindle 62. Cranks 30<a>, 49, 63 on the spindles 30. 48, 62 engage. grooves 76. 77, 78 in the bar 37, which is slid longitudinally.
Patent GB-575755-A (GB)
Title: Improvements relating to fuel feed chambers for the carburetters of internal combustion engines
IPC: F02M7/12
Filed: 1944-08-18
Abstract: 575,755. Feed chambers for carburetters. MORRIS MOTORS, Ltd., and DAVEY, B. A. Aug. 18, 1944, No. 15825. [Class 7 (iii)] The fuel in a carburetter feed chamber b is maintained at a level determined by an adjustable overflow device, comprising an adjustable cylinder c working in the feed chamber, the chamber having a liquid fuel inlet d and communicating at f with the carburetter jets and being arranged within a second chamber a having an outlet e for the liquid fuel which flows over the upper edge of the adjustable cylinder. Fuel from the outlet passes back to the supply system.