baber/WOPTO huggingface dataset:
Patent GB-869050-A (GB)
Title: Improvements in reflex klystrons
IPC: H01J23/36
Filed: 1959-04-20
Abstract: 869,050. Impedance matching. VARIAN ASSOCIATES. April 20, 1959 [May 26, 1958], No. 13429/59. Class 40(8) [Also in Group XL(a)] A reflex klystron of the internal-external cavity resonator type has means for suppressing undesired modes of operation including a wave trap in the form of a cavity resonator coupled to the external cavity, the cavity resonator containing a dissipative element for absorbing energy associated with the undesired mode. The klystron comprises an emitter 19, focusing electrode 20, grids 16, 18 and reflector electrode 14. Energy is transmitted to an external cavity resonator through an oval ceramic window 23 sealed in a flexible alloy frame 22. The space 22<SP>1</SP> between the window frame and the body of the klystron presents a series inductance to the transmitted wave the effect of which is eliminated by means of a number (e.g. two or four) of flexible metallic strips 24 brazed to the window frame and the klystron body. Coupling between the internal and external cavities is improved by means of a U-shaped nickel strap 37 which also has the effect of increasing the frequency separation between the full-wave mode and the unwanted 3#/2 mode. The external cavity   is tuned by a capacitative plunger 29 such as is described in Specification 861,069. The cavity is connected by a quarter-wave section 31 to a wave trap 32 designed to surpress the unwanted mode. A resistance card 36 is arranged in the trap 32 one quarter-wavelength from the end wall. In the modification shown in Fig. 3, the wave trap 42 containing resistive card 43 is coupled to the external cavity resonator 39 by means of a quarter-wave section 38. The cavity is coupled to the section 38 by an aperture 41.
Patent GB-1037540-A (GB)
Title: Improvements relating to the preparation of epsiloncaprolactam
IPC: B01J2/04
Filed: 1964-04-01
Abstract: The invention comprises caprolactam in the form of round pellets. The pellets preferably have a mean diameter of 0.5-5 mm. and contain less than 0.3% by weight of moisture.  The pellets may be prepared by dividing molten caprolactam into drops, e.g. by spraying and solidifying by direct cooling in a gaseous medium, e.g. air.  In the examples, the drops fall down a tower against an upward current of air.  Additives may include stabilizers such as anti-oxidants, and catalysts for the polymerization of the lactam.
Patent GB-751895-A (GB)
Title: Shock-damping means for liquid-conveying pipes
IPC: F16L55/053
Filed: 1954-05-07
Abstract: 751,895. Pressure-relieving devices for fluids. QUENETTE, J. May 7, 1954 [May 28, 1953], No. 13445/54. Classes 69 (2) and 135. Shock damping means for liquid supply pipes comprises a vessel divided by a diaphragm 4 into a compartment 3a communicating with a supply pipe 2 and a compartment 3b communicating with a container 6 filled with air at a slightly higher pressure than that normally prevailing in the pipe 2. The container 6 is large so that on a shock wave moving the diaphragm from its normal position (shown in dotted lines) the rise in pressure in the compartment 3b and the container is negligible.
Patent GB-901866-A (GB)
Title: Improvements in or relating to capacitors
IPC: H01G4/015
Filed: 1961-04-14
Abstract: 901,866. Capacitors. SIEMENS & HALSKE A.G. April 14, 1961 [April 14, 1960], No. 13525/61. Drawings to Specification. Class 37. In a method of producing a rolled capacitor, the outer ends of the conductive and dielectric layers are coterminous, and a layer of electrically-insulating substance is applied over the said ends and circumferential surface of the capacitor to prevent the turns subsequently unwinding. The said substance may be sprayed on or shrunk on in the form of a tube. A layer of insulating substance may be applied to the inner circumferential surface to prevent the inner turns unwinding.
Patent GB-1049917-A (GB)
Title: Improvements in steel making processes
IPC: C22C38/00
Filed: 1964-04-02
Abstract: Steels which are to have good cutting properties over a wide range of cutting speeds are produced by adjusting the oxygen content of a steel melt to between 0.004 and 0.1% and then treating the melt with an alloy consisting of .Si.45-90% .Ca.0.5-40% .Al.up to 4% .Mn.0.5-8% .Fe.(if any) the remainder, the composition and amount of the alloy added being adjusted in relation to the oxygen content of the melt to produce in the steel uniformly distributed non-metallic inclusions comprising more than 50% SiO2, 0.5-25% CaO and not more than 45% Al2O3.
Patent GB-652279-A (GB)
Title: Process for the manufacture of diastereoisomers
Filed: 1948-12-15
Abstract: Compounds of the general formula <FORM:0652279/IV (b)/1> (wherein R, R1 and R2 are the same or different and represent hydrogen or acyl radicals, R3 represents hydrogen or an alkyl radical of not more than 4 carbon atoms, and R4 and R5 are the same or different and represent hydrogen, halogen, or alkyl or alkoxy radicals of not more than 4 carbon atoms) are separated into their (racemic) regular and pseudo structural forms by crystallization from an organic solvent in which one form is less soluble than the other (e.g. an aliphatic alcohol, acetone, chloroform, ethyl acetate or aqueous mixtures thereof). After separation of the less soluble form, the more soluble may, if desired, be recovered from the mother liquor, and can be purified by conversion into a derivative which is less soluble than the corresponding derivative of the other form; e.g. the crude pseudo form of the free diol (from which the regular form has mostly been separated in the first crystallization) may be acylated with an acyl halide or anhydride to the N : O3-diacyl derivative, which on recrystallization separates first.  Examples describe the separation of 1-phenyl-2-aminopropane-1 : 3-diol and its N-(dichloracetyl), o-methyl, m-methoxy and 31 : 41-dimethyl derivatives and of 2-amino-3-phenylbutane-1 : 3-diol.  Specifications 652,272, 652,273, 652,274, 652,275, 652,276, 652,277, 652,278 and 652,280 are referred to.
Patent GB-988434-A (GB)
Title: Improvements in or relating to gas-tight sealing devices
Inventor: WILLAN JAMES HENRY GERALD
IPC: F16J15/52
Filed: 1963-04-06
Abstract: 988,434. Seals. G. L. WILLAN Ltd. March 25, 1964 [April 6, 1963], No. 13780/63. Heading F2B. [Also in Division F4] Sealing means for a vacuum furnace poker 7 or other member capable of oscillation and reciprocation comprises a sealing sleeve 8 in which the member is slidably sealed and which is mounted in a ball-and-socket joint formed in halves and sealed to the sleeve by a flexible diaphragm 25 secured at its inner periphery to the sleeve and clamped at its outer periphery between the two ball members 17, 21 of the joint. The poker 7 is a sliding fit in the sleeve 8 and is sealed therein by 0-rings (not shown) housed in grooves 9 in the sleeve which extends into a tube 5 on the furnace cover 2. The socket ball member 21 is secured by a flange 20 to the tube 5 and the poker is supported in telescopic tubes 34A, 34B and 34C depending from the sleeve 8.
Patent GB-1026293-A (GB)
Title: Generator waveform reconstruction circuitry
IPC: H02M5/27
Filed: 1964-04-03
Abstract: 1,026,293. Modifying waveforms. GENERAL ELECTRIC CO., April 3, 1964 [April 5, 1963], No. 13899/64. Heading H2H. The output waveform of a variable speed alternator 300 is connected for distortion due to transient impedance by a circuit which adds through current transformers 10-12 a voltage to correct the distortion. The transient impedance of the alternator is determined and equivalent networks 13-15 constructed to provide the added voltage. The same transformers detect the load current and determine the level of the correcting voltage. A frequency converter 20 is connected to the supply comprising for each phase a pair of controlled rectifiers fired by a signal derived from the corrected voltage and a stable frequency oscillator 320.
Patent GB-1425481-A (GB)
Title: Process for reducing nitrogen oxide emission from automobile exhausts
IPC: B01D53/94
Filed: 1973-03-22
Abstract: 1425481 Treating exhaust gases MONSANTO CO 22 March 1973 13902/73 Heading C1A Nitrogen oxides are removed from automobile exhaust gases which also contain oxygen, carbon monoxide, hydrogen and hydrocarbons by contacting the gases at elevated temperatures with a catalyst containing rhodium on a support in an amount of less than 0À05% by weight under conditions which on the average are reducing but where sufficient oxygen is present to keep the ammonia production to no more than 100 p.p.m. but insufficient to prevent at least 90% reduction of the nitrogen oxides. The catalyst suitably contains 0À005 to 0À005% rhodium and may also contain nickel, platinum and halide ions. The support is preferably on a transition alumina and may be in the form of an alumina-coated ceramic. The process is preferably operated at above 600‹ C. and the average amount of oxygen is preferably no greater than 2% by volume. The process is suitable for engines operating with a rich air to fuel ratio. Supplementary air is added to the exhaust gases prior to contact with the catalyst to obtain the required oxygen content, e.g. by impinging a jet of air upon a jet of exhaust gases.
Patent GB-1494975-A (GB)
Title: Butterfly valves
IPC: F16K1/22
Filed: 1976-04-07
Abstract: 1494975 Butterfly valves MILWAUKEE VALVE CO Inc 7 April 1976 [9 May 1975] 14011/76 Heading F2V A butterfly valve member 16 has a part spherical peripheral edge 70, 72 which, in its closed position, contacts a sealing ring 60 housed in an internal groove 50, 52 in a cylindrical body 12, and is characterized in that vanes 78, 80 formed on the member 16 define circumferentially spaced continuations of the edge 70, 72 and hold the sealing ring 60 in the groove 50, 52 immediately prior to closing or after opening of the valve. The height of the vanes increases with distance from the axis of rotation of the valve member 16 so that all the vanes make or break contact with the sealing ring 60 at the same time. In a modification, Fig. 5, the valve member comprises a central, planar disc 102, from each face of which extend parallel vanes 114, the peripheries of the disc 102 and of the vanes 114 all defining parts of a common sphere. The sealing member is thus engaged in the closed position of the valve member by the periphery of the disc 102 and at all other times by the peripheries of the vanes.
Patent GB-1441367-A (GB)
Title: Filled aromatic polycabonates with improved properties
IPC: C08L33/02
Filed: 1974-03-29
Abstract: 1441367 Polycarbonate moulding compositions BAYER AG 29 March 1974 [26 May 1973] 14025/74 Heading C3R A moulding composition comprises (a) 90 to 50 parts by weight of a thermoplastic aromati polycarbonate of molecular weight between 10,000 and 100,000, (b) 1 to 50 parts by weight of a hydrophobic quartz mineral that is composed of over 90% by weight of SiO 2 , and (c) 0À1 to 10 parts by weight of one or more vinyl polymers containing, in the same polymer or in a mixture of polymers, both epoxy groups and ether acyloxysilane groups or alkoxysilane groups, the composition containing at least 0À01 parts by weight of epoxy equivalents and 0À01 parts by weight of silicon resulting from the silane groups. Up to 30% by weight of the quartz mineral may be replaced by titanium dioxide. The polycarbonates used in the examples are those derived from bisphenol A, optionally with tetrabromobisphenol A or tetrachlorobisphenol A, Various vinyl polymers (c) are specified, e.g. that derived from glycidyl methacrylate, methyl methacrylate and vinyltriethoxy silane.
Patent GB-946417-A (GB)
Title: Improvements in or relating to a disc assembly for data storage apparatus and magnetic recorders
IPC: G11B17/028
Filed: 1961-04-18
Abstract: 946,417. Magnetic disc recording &c. apparatus. LABORATORY FOR ELECTRONICS Inc. April 18, 1961 [May 2, 1960; March 21,1961], No. 14047/61. Heading G5R. A thin, flexible disc 2 is rotated by a motor 6 above a plurality of heads 17 and means are provided to adjust the disc/head spacings so that all heads have substantially equal sensitivity. The heads 17 are carried in a backplate 9 and when this is plane, the outline 26 of the disc (clamped to the radial distance 23) follows the NORMAL curve. When the backplate 9 is grooved as in Fig. 6, and the disc 2 rotates in the direction 34, the outline follows the curve 33, while if the edge of the disc 2 is perforated, Fig. 7, the outer edge then follows the curve 35. Reverse rotation has an opposite effect and the disc 2, when perforated as in Fig. 7, when rotated in the direction 36, takes up the outline of curve 37. Instead of the Fig. 6 arrangement, the backplate may be perforated in a number of places (Fig. 8, not shown) giving rise to the outlines of Fig. 5, (not shown). In either case, suitable proportioning brings the outline close to the IDEAL curve 27, where the product of head/disc spacing and of relative transducing speed is constant. In a second embodiment (Figs. 9, 10, not shown), a single hole in the disc 2 allows the region of the disc radially outward of the hole to take up the desired profile above a plane backplate. In Fig. 1, a motor-field screening plate 18 is sufficiently removed from the disc 2 to have no effect on the disc profile.
Patent GB-127827-A (GB)
Title: Improvements in Chain Hoists.
Inventor: LEON KARL OSKAR
IPC: B66D5/02
Filed: 1919-06-04
Abstract: 127,827. Leon, K. O. June 5, 1918, [Convention date]. Geared pulley-hoists. -In worm-geared pulley-hoists, when the hand-chain wheel is rotated to raise the load, the worm wheel 3 screws along the shaft 5 and forces together the disks 7 of a friction clutch which couples the load-chain wheel 2 and the shaft. When the hand chain is moved to lower the load, the shaft 5 is held by a ratchet device 17, 18, and the wheel 3 is screwed along the shaft to release the clutch. The wheel 2 is connected by a crank 11 and connecting-rod 10 to the piston 9 of a fluid-pressure brake. Ports 13 lead from the brake cylinder 8 into a passage 12, and one of them is throttled by a slide valve 14 which is connected by a bell-crank lever 15 to a spring- actuated pin 16 bearing against the wheel 3. The amount of throttling, and hence the speed of lowering, depends on the amount of movement of the wheel 3. In a modification, the clutch is arranged between the worm and the hand-chain wheel, and the latter controls the amount of throttling of the port 13.
Patent GB-1421899-A (GB)
Title: Mixer valves
IPC: F16K11/085
Filed: 1972-03-25
Abstract: 1421899 Valves H WATTS and D E WATTS 16 March 1973 [25 March 1972 (3) 18 Dec 1972] 14137/72 14138/72 14139/72 and 15286/73 Addition to 1117783 Heading F2V A mixer fitting for hot and cold water supplies has a cylindrical chamber 2, Figs. 1 and 2, with laterally disposed inlets 3, 4, valve means 6 rotatable between two angularly spaced positions, sealing members 8, 9 carried by the valve means for shutting off the inlets and comprising a pair of tubular members each of which is a sliding and sealing fit in a transverse cavity in the valve means and has one end in sliding and sealing relationship with the cylindrical surface of the chamber and which when brought into register with the inlet is urged against the inlet by water pressure therein to seal the inlet, manual control means 21 at one end of the chamber, and an outlet port 15 which exits from the chamber either laterally or axially from the end of the chamber opposite the manual control means. Angular movement of the valve is limited by a stop pin 24 and the sealing members may be urged outwardly by springs. The valve may be modified by the provision of a second outlet, e.g. for a shower, controlled by a diverter valve or by providing an inclined outlet with an aerator or a rose.
Patent GB-250416-A (GB)
Title: Improvements relating to the measurement of heat
IPC: G01K5/32
Filed: 1925-05-29
Abstract: 250,416. Blackie, A. May 29, 1925. Heat and temperature co. efficients, apparatus for determining; thermometers and pyrometers. - Consists of apparatus in which the equilibrium pressure of a fluid due to its gain or loss of heat and to its resultant flow through a restricted passage is arranged to be measured. The apparatus shown comprises an approximately cylindrical chamber 1, one circular face 2 of which is subjected to the heat, this face being preferably blackened while the remainder of the chamber is bright. A pipe 3 connects the chamber with a pipe 4 which at its upper end is provided with a plug 5 having a capillary bore 6, and at its lower end is connected to one arm of a manometer &c. 7. The heat received by the surface 2 is measured by the steady or maximum pressure attained during the movement of the fluid through the aperture 6. The pressure gauge may be of the aneroid, Bourdon, &c. type and the chamber 1 may itself constitute the indicating element of an aneroid gauge, the face opposite to the face 2 being constructed as a diaphragm. The device may be used for example to measure the heat transmitted through a surface such as a boiler &c. setting, or it may be arranged to receive radiant heat only. Alternatively, the chamber 1 may be immersed in a heated medium so as to act as a thermometer.
Patent GB-235711-A (GB)
Title: Improvements in appliances for opening tins, and their like, in one operation
IPC: B67B7/46
Filed: 1924-06-13
Abstract: 235,711. Hallam, G. June 13, 1924. Opening by cutting. - A machine for opening tins by cutting out a portion of an end comprises a base 1, in which are formed centreing openings 2 of different depths and diameters, the base supporting t'wo or more guide rods 3 upon which a member 4 is slidable, the position of the part 4 being variable by means of a screwed spindle 5 operated by a handle 6. Mounted to slide vertically within the part 4, and operable by a rack and pinion actuated by a handle 11, is a sleeve 7 supporting by means of a bolt 13, a cutter 12, the bolt terminating in a piercer point 15. The upper end of the bolt carries a handwheel 14 to facilitate adjustment &c. of the cutter which is attached to the threaded lower end. Rods 17, secured to a washer 18 and passing through openings in the top of the cutter, serve for removing the cut-out portion from the cutter after opening. In use, the sleeve having been set within the part 4 by engaging the spring- pressed ball 4a in an opening in the sleeve, the part 4 is brought to the requisite height and the sleeve and cutters moved downwardly to open the tin.
Patent GB-311939-A (GB)
Title: Improvements in and relating to connecting and tightening devices for chains
IPC: F16G15/04
Filed: 1928-05-15
Abstract: 311,939. Jackson, L. Mellersh-, (American Chain Co., Inc.). May 15, 1928. Chain strainers.-A chain strainer, particularly for the side chains of anti-skid devices for vehicle wheels, comprises a tension member 10 having an aperture 12 near one end to receive a chain link 13 and an open slot 15 near its other end. A locking lever 11 is pivoted to this end of the tension member and is provided with a recess 25 to receive the other end link 16 and with a deeper recess 24, which, when the lever 11 is swung counterclockwise, coacts with the slot 15 to retain the link. A hook 26 is formed near the free end of the lever to engage under the link 13 and lock the strainer. The rook is in the same plane as the lever, which is swivelled at the pivot 18 by the spring-pressed arrangement shown in Fig. 4 so that the lever may be swung transversely somewhat to permit the hook to clear the link 13. A portion of the flange 17 of the tension member 10 is formed as a protective ring 21, Fig. 4, for the pivot 18 and spring 19.
Patent GB-120869-A (GB)
Title: Improvements relating to the Manufacture of Nitric Acid.
Inventor: DAWSON BEN
IPC: C01B21/26
Filed: 1918-09-04
Abstract: 120,869. Dawson, B. Sept. 4, 1918. Nitric acid.-In the absorption of nitrogen oxides in an upward spray of water and air in an empty tower in which the spray is produced by a jet of compressed air opening below the surface of water in the bottom of the tower, the jet J is surrounded by an inverted funnel J' having holes J<2>, the upper part of the funnel being above the lever W of the water. This arrangement prevents irregularities in the working of the jet owing to variations in the level of the water. A series of towers T are shown in Fig. 1, the gases entering at N and leaving at N<2>, while water is supplied at W<2> and drawn off at W<3>.
Patent GB-439931-A (GB)
Title: An improved process for the production of potassium nitrate
IPC: C01D9/04
Filed: 1935-05-16
Abstract: In the production of potassium nitrate from nitric acid and potassium sulphate, the process of the parent Specification is modified by using less nitric acid than is used in the parent case and separating the precipitated potassium nitrate before the double salt KHSO4, KNO3 is formed.  By this means larger yields of potassium nitrate are obtained, and the mother liquor corresponds in composition to a solution saturated with the double salt.  In an example, the solution of potassium sulphate in nitric acid is effected at 50 DEG  C., and the solution is cooled to 0 DEG  C. in 40 minutes before the separation of potassium nitrate. The mother liquor is used for decomposing phosphates.
Patent GB-829444-A (GB)
Title: Apparatus for measuring the magnetic susceptibility of a gas
Inventor: MUNDAY CHARLES WALTER
IPC: G01N27/74
Filed: 1957-05-07
Abstract: <PICT:0829444/III/1> Apparatus of the type described in Specifications 703,240 and 746,778 for determining the composition of a gas by measuring its magnetic susceptibility, wherein a body suspended on a fibre in a cell containing the gas is subjected to a non-uniform magnetic field, and the deflecting force thereby exerted on the body is measured, is characterized in that the cell comprises a first zone surrounding the body, and a second zone through which the gas is passed in a streamlined manner, the gas circulating in the first zone only by diffusion from the second zone.  As shown, a cylindrical cell 1, made of non-magnetic material and containing a pair of shaped polepieces 3, 4, is slidably mounted between the poles 6, 7 of a permanent magnet.  A quartz dumb-bell 5 is suspended on a fibre 5A, which is held at each end, between the polepieces in a first zone 2 of the cell, and the gas to be tested is introduced into a second zone 10, through an inlet tube 11, in such a manner that it circulates with streamlined flow through the second zone to an outlet pipe 12, some gas diffusing into the first zone and causing deflection of the test-piece, which is measured in known manner. Non-magnetic blocks 8, 9 reduce the dead-space of the first zone. The zones may be partly separated by a porous or perforated barrier.
Patent GB-232446-A (GB)
Title: Improvements in worm gearing of the drop-worm type applicable to the saddle of a lathe
IPC: B23Q5/40
Filed: 1924-06-14
Abstract: 232,446. Lang, W. B., and Watkins, L. June 14, 1924. Turning. - In means for controlling the engagement of worm-andwheel gearing in the feed-mechanism of lathes, a worm sleeve 5 carries worms 3, 4 alternatively engageable with worm-wheels 1, 2 for longitudinal and transverse feed, respectively, and slides in a box or casing 7 pivoting on a pin 8 carried in the apron and parallel with the worm-wheel shafts. The sleeve rotates on a rod 10 slotted to engage a crank-pin 14 on a shaft 15, which carries pins 17 engaging longitudinal slots in a sleeve 19 carrying a handle 20. A lever 21 engages at one end a lug 23 on the box 7 and, at the other, the end of the sleeve 19. The worm sleeve 5 is splined to a driving-pinion 6, which is geared to the feed driving-shaft 26. When the sleeve 19 is pressed downwards, the lever 21 disengages from the lug 23 and the box 7 falls about the pivot 8, in which position rotation of the handle 20 moves the worms 3, 4 for engagement with their appropriate wheels. Reengagement is attained by lifting the handle and shaft 15.