baber/WOPTO huggingface dataset:
Patent GB-928540-A (GB)
Title: Travelling wave tubes
Inventor: JR WILLIAM ANDERSON SMITH
IPC: H01J25/44
Filed: 1961-01-20
Abstract: 928,540. Magnetron amplifiers. RAYTHEON CO. Jan. 20, 1961, No. 2428/61. Class 39 (1). A crossed field electron discharge device comprises a non-re-entrant delay line 12 having at least two terminals 54, 55, Fig. 2, which are mutually uncoupled except through the delay line, and a substantially continuous cathode, Fig. 1, co-extensive with a major portion of the delay line, in which the cathode is a cold cathode to which no external supply of energy is applied to elevate its temperature sufficiently to produce an electron flow sufficient to operate the device, and in which an external source of radio-frequency power is coupled to at least one of the delay line terminals 54, the magnitude of the power being at least sufficient to cause ionisation of residual gas in the device. The cathode is preferably comprised of a substance having a secondary emission ratio exceeding unity, e.g. nickel rods which may be platinum coated, copper rods, oxide coated, or tungstenthoria cermet cathodes containing 10% or 30% thoria. In the operation of the device a sequence device is used so that the radio frequency power is first applied to the delay line followed by the application of the anode voltage.
Patent GB-112191-A (GB)
Title: Improvements in or relating to Railway Signalling Apparatus, and Apparatus for Stopping Trains Independently of Drivers.
Inventor: TIDDEMAN EDMUND SPENSER
IPC: B61L3/02
Filed: 1917-02-19
Abstract: 112,191. Tiddeman, E. S. Feb. 19, 1917. Track apparatus actuating signals on trains and for stopping trains.-Apparatus of the kind in which danger signals are operated and brakes applied by mechanical means when a track ramp is passed, unless electrical devices are energized to substitute a clear signal and to restrain the operation of the brakes, is arranged to control steambrake apparatus on the locomotive, either alone or in conjunction with vacuum or pressure brakes on the train. Fig. 3 shows means for controlling the supply of steam to the steam brake pipe 60 and the admission of air to the vacuum train-pipe through the pipe 69. The lever 17 is held in the normal position shown in full lines and released or maintained when the shoe 16 rides up the track ramp according to the electric state of the ramp in the manner described in Specification 6499/15. In the present apparatus, the lever 17 is connected by links to a lever 41 supporting a steam-pressed valve 44 which is kept closed so long as the toggle links 24, 25 are kept straightened. When these collapse, steam passes to the valve 55 which opens the pipes 52 to the steam-brake pipe 60 and cuts the latter off from the pipe 62 to the driver's release valve. Steam also passes from the pipe 51 to a whistle. The lever 17 is extended to engage the valve stem of a vacuum-brake valve 63, which, when the lever 17 is displaced, opens the brake pipe 69 to atmosphere through a whistle on the pipe 70. The apparatus is re-set by the piston 73, one side of which is always open to the atmosphere, while the other side may be connected to an auxiliary vacuum reservoir 85 through the hand-operated valve 79. A polarized relay may be used on the train to distinguish between ramps for different directions of running along sections of single track.
Patent GB-751029-A (GB)
Title: Recovery of platinum metals from sulphidic raw materials
IPC: C01G55/00
Filed: 1954-01-27
Abstract: Platinum metals (specifically platinum, palladium, osmium, iridium, rhodium and ruthenium) contained in sulphidic raw materials comprising iron and copper and/or nickel and/or cobalt, are recovered by at least partly converting the iron sulphide to oxide by roasting to a sulphur content at least sufficient to combine with said non-iron metals as sulphides, solubilizing said metals by sulphatizing and/or chloridizing roasting, leaching the product with water, acids, e.g. dilute sulphuric acid, salt solutions or ammonia, separating the solution and treating the residue, preferably in aqueous suspension and in the presence of a chloride, e.g. sodium chloride (whereby a complex salt, e.g. Na2Pt Cl6 is formed), with chlorine, separating the platinum metals from the residue after leaching if necessary, and recovering them from solution, e.g. by precipitation with a nonprecious metal such as copper or iron, or with formic or sulphurous acid.  In modifications, (1) the leaching is carried out with ammonia and the chloridizing and/or sulphatizing roasting is omitted, (2) the leaching is carried out with water, acids or salt solutions and the chlorine treatment is effected simultaneously, (3) the leaching is carried out with ammonia and air, the ironcontaining residue is not roasted until after the leaching and is then treated with chlorine.  In all cases where ammonia is used for leaching is should be expelled, e.g. by heating with lime before introducing chlorine.  Roasting is preferably carried out by fluidized technique, e.g. at above 600 DEG C.; the temperature may then be reduced and chloridizing agents such as sodium chloride added.  In the example a rotary kiln was used for the first roasting at 600 DEG C., and a hearth roaster for the chloridizing roasting at 400 DEG C. with 20 per cent of sodium chloride; leaching with 1 per cent sulphuric acid was employed and the leached product treated with a solution containing 20 per cent of sodium chloride into which chlorine was led.  Specification 739,827 is referred to.ALSO:Platinum metals are recovered from solution by precipitation with a non-precious metal such as copper or iron or with formic or sulphurous acid.
Patent GB-214731-A (GB)
Title: Improvements in shift mechanisms of typewriting machines
IPC: B41J1/14
Filed: 1923-01-27
Abstract: 214,731. Harrington, F. C. A., and Harrington Standardized Typewriter Co., Ltd. Jan. 27, 1923. Shift-key actions.-In machines of the type in which the platen is raised or lowered through the medium of a depending arm and a rail on an oscillating frame operated by the shift-key, the rail v, which is arranged parallel to the platen and is carried at the upper end of the frame p, the intermediate pivotal mountings q, r, and the connection to the shift-key at the lower end of the frame are all arranged in a substantially vertical plane, the rail being engaged by the arm m depending from the platen-carriage b. Shift-keys are mounted at each end of a rocking shaft 7 connected bv an arm 8 and a link 6 with the frame p which is pivoted at the back of the machine. The frame is provided with upwardly and outwardly extending arms s, t in which the rail v is adjustably mounted. Upwardly and downwardly extending arms on the frame p carry adjustable stops z<1>, z<2> engaging stops 2, 3 on the machine to limit the movement of the frame. The link 6 has ball-and-socket connections at each end. Paper-carriages; carriage-shift mechanism. - The platen-carriage b is supported by rollers f, g on a rail h secured to the machine frame. Projections k, k<1> and the downwardly-extending arm m are formed on the platen-carriage and are connected by a rail n parallel to the platen. The lower end of the arm m is bifurcated to embrace the rail v, and the inner arm of the bifurcated portion is provided with a roller w. On operation of the shift-key, the platen-carriage is rocked on the rail h.
Patent GB-546893-A (GB)
Title: Improvements in or relating to means for guiding threads from kops, spools, or the like
IPC: B65H57/12
Filed: 1941-07-11
Abstract: 546,893. Unwinding thread. BALLAMY, L. M., and SHEEPSHANKS, R. H. July 11, 1941, No. 2556/42. Divided out of 547,117. [Class 120 (ii)] [Also in Group VII] Thread for a sewing- machine needle is received from a stationary cop 14 by the flexible end 17 of a tube which moves round the cop as the thread unwinds. The tube may be flexible throughout its length up to the delivery of the thread to the sewing machine.
Patent GB-517409-A (GB)
Title: Improvements in apparatus for melting soft metals
IPC: F27D99/00
Filed: 1939-01-25
Abstract: 517,409. Thermal switches. BADER, K. Jan. 25, 1939, No. 2617. [Class 38 (v)] [Also in Groups XIII and XI] A control for the electric heating of a crucible, for melting soft metal and provided with lagging surrounding the heating means, interrupts the heating after a predetermined expansion of the crucible. An arm 10 secured to the base of the crucible 1 carries an electrical contact 22. Connected to a pivot 12 on the arm 10 is a lever 11 carrying a contact 20. A flexible steel strip 13 extends from the top of the crucible 1 to the arm 11, so that on expansion of the crucible the lever 11 is rotated to separate the contacts 20, 22. The strip 13 is shielded by heat insulation 5. The current to the heating elements, which normally passes through the contacts 20, 22, then passes through a relay as described in Specification 504,724 to produce a tilting of a mercury switch 19 to break the electric circuit. A pilot lamp 33 is connected in parallel with the contacts 20, 22 to indicate when the circuit is broken.
Patent GB-697955-A (GB)
Title: A method and apparatus for multi-colour printing on fabrics and like materials
Inventor: WIGBY FREDERICK FRANK
IPC: B41F15/08
Filed: 1950-02-02
Abstract: 697,955. Stencilling. JAFRA PUBLICITY, Ltd. Feb. 2, 1951 [Feb. 2, 1950], No. 2698/50. Class 100(ii) In multicolour printing by successive stencilling on neckties, scarves or other forms of textiles, soft leather &c. the material is positioned before the application of at least the second and further colours by use of a transparent guide in register with the operative position of the stencil next to be used, the guide then being displaced without disturbing the material to permit the colour to be applied. The guide 15, hinged to one end of a base 10, carries a replica 16 of the representation to be applied by a stencil 18 to an article held by a tongue 20; the guide is swung over the article and the tongue 20 is moved to bring a design 21 already carried by the article into exact register with the replica 16; the guide is then returned to the position shown and a silk screen frame 12, hinged to the other end of the base 10 and carrying the stencil 18, is brought down for application of the colour by a rubber &c. squeegee in the normal way. Further colours may be applied by having additional replicas on the guide 15, or each on separate guides, corresponding to further stencils on the frame 12. A number of screens and supports may be provided, each having a number of guides, or one guide with a number of replicas, corresponding to a number of identical stencils through which the same colour is applied simultaneously to a number of articles side-by-side. The initial design 21 may be applied in any way, e.g. in separate apparatus, or by use of a fixed tongue 19 aligned with a stencil 14. According to the Provisional Specification the guide may be slidable on the base 10 instead of being hinged, and in either case may be finally located by co-operating projections and recesses or holes; means may be provided for securing the material to be printed on positively to the base 10.
Patent GB-1245306-A (GB)
Title: Dust collecting apparatus
Inventor: JONES ALLEN H
IPC: B01D46/04
Filed: 1969-01-16
Abstract: 1,245,306. Gas filter. W. W. SLY MFG., CO. 16 Jan., 1969 [16 Jan., 1968], No. 2729/69. Heading B1T. In a gas filter as described in Patent No. 1,185,337, wherein successive ones of a row of inward-flow filter bags (25) are supplied with reverse flow gas by a nozzle moving across their open mouths, the nozzle comprises a gasdelivering slot 43 in front wall 45 on which are mounted parallel resilient blades 50, which project out to engage the upright mullions (26) separating the mouths of adjacent bags (Fig. 5, not shown), the upper and lower ends of the spaces between blades 50 being sealed by U- shaped resilient strips 74 whose free edges make a sliding seal with rails 56 (57), extending along the top and bottom of the row. Rails 56 (57) comprise an inclined portion (Fig. 3) and the ends of blades 50 and the central parts of the strips 74 are bevelled to match this portion. Blades 50 and strips 74 may be rubber or plastics. Strips 74 are secured to upper and lower angle bars 68 by clips 79, with straight resilient strips 72 interposed. The end portions of adjacent strips 74 touch, as shown in Fig. 4, but are not connected.
Patent GB-980816-A (GB)
Title: Improvements in tunable parametric amplifiers
IPC: H03F7/04
Filed: 1962-01-25
Abstract: 980,816. Parametric amplifiers. GENERAL ELECTRIC CO. Jan. 25, 1962 [Feb. 10, 1961], No. 2782/62. Heading H3B. A tunable travelling wave parametric amplifier has an idler wave transmission path so loaded that its frequency w i  against phase constant B i  curve contains a region where the frequency w i  remains substantially constant for variations in B i . By operating the amplifier at this idler frequency a wide range of signal frequencies w s  may be tuned without a proportional tuning range for the pump frequency w p  being necessary. In fact the variation in pump frequency required is equal to the variation in signal frequency as the constraints w i  + w s  = w p  and B i  + B s  = B p  must be satisfied to obtain amplification. In the embodiment shown in Figs. 1 and 3 a backward travelling wave amplifier comprises a waveguide 6 carrying the pump wave and a central sinusoidal conductor 7 carrying the signal and idler frequencies, the non-linear capacitances being provided by matched pairs of diodes connected between the central conductor 7 and the wide walls of the waveguide. A similar forward travelling wave amplifier (Fig. 7, not shown) is also described. In the embodiment shown in Figs. 10 and 11 a central waveguide 32 carries the pump wave, a compartment 38 contains a sinusoidal conductor 40 which carries the signal wave and is coupled by diodes 58-63 to conductors 44-49 which resonate at the idler frequency, tuning to this frequency being obtained by tuning stubs 51-56. The tuning stubs 64-69 serve to match the capacitance characteristics of the diodes and stubs 71-76 serve to couple the pump wave to the conductors 44-49. This last embodiment may also be used as a frequency changer, for example by replacing one of the stubs 51-56 by a coaxial line which transmits the idler wave. It is also stated that a looped path may be used with only one reactance element, the waves passing the element a large number of times. Tuning of the signal may be carried out electronically the pump frequency adjusting automatically to produce maximum signal amplification.
Patent GB-604133-A (GB)
Title: Improvements in or relating to holders for condenser lenses
IPC: G02B7/02
Filed: 1945-02-05
Abstract: 604,133. Condenser lens mounts. KIESCHKE, W. Feb. 5, 1945, No. 2797. [Class 97 (i)] A tubular condenser holder is made in segments, each of which has an internal groove to receive an arc of the edge of the lens, 'secured together by an encircling ring. The segments may be slotted to provide ventilation. As shown the holder 4 comprises segments 5, 6 divided by diametrically opposite axiallydirected slits 7 and groove at 10 to receive a plano-convex condenser lens 3. The slits 7 widen at the grooved end to form ventilation slots 8, and similar slots 8 are formed in the body of each segment. These slots also provide resilient tongues 9 in the segments which allow for lens expansion. Screwed on to the assembled segments to hold them together is a ring 13, an internal flange 14 which rests on the top of the segments. A recess 18 in the holder 4 receives a loose fitting trunnion ring 19 in which are secured diametrically opposite pins 20, passing through horizontal slots 22 in supporting arms 23 and vertical slots 21, in a housing 17 encircling the holder 4. Between the ring 19 and an external flange 15 on the holder 4 is a spring 24 so that by lowering or raising the pins 20, the holder 4 may be depressed upon or removed from a support (not shown). A socket in the ring 13 above flange 14 receives a ring 26 into which is screwed an internal ring 28 loosely securing in the socket another plano convex lens 27, the ring 26 being secured to the ring 13 by a removable spring wire 29. A ring 30 carrying a loosely fitting diffuser plate 31 is similarly secured to the ring 26. Specification 592,953 is referred to.
Patent GB-979452-A (GB)
Title: Improvements in or relating to mine roof supports
Inventor: PEAKE CECIL VOWE
IPC: E21D23/00
Filed: 1960-01-26
Abstract: 979,452. Advancing mine roof supports. COAL INDUSTRY (PATENTS) Ltd. April 26, 1961 [Jan. 26, 1960], Heading E1E. A mine roof support comprises two superimposed impermeable bags 1, 2 which are mounted on rollers 4, 5 respectively and disposed between side plates 3. Each bag is subdivided by walls 7 into chambers inter-connected by pressure limiting non-return valves and is protected from undue contact with the rollers by a belt 15. The spindles of the rollers 4 extend into slots to allow relative vertical adjustment of the bags. A roller and endless band roof support 12, 13 carried by a pair of arms 11 is mounted on the side plates 3 by an oleopneumatic leverage 14.
Patent GB-1207708-A (GB)
Title: Melt casting of thermoplastic materials
Inventor: SPENCER ARTHUR WILLIAM
IPC: B29C48/08
Filed: 1968-01-18
Abstract: 1,207,708. Making lay flat films and sheeting by melt casting. EASTMAN KODAK CO. 18 Jan., 1968 [20 Jan., 1967], No. 2813/68. Heading B5B. In the production of lay flat films and sheeting by melt casting a synthetic organic thermoplastic polymer under pressure through a linear extrusion orifice on to the peripheral surface of a chilled moving casting surface such as a roll, a stream of a clean heated gas is caused to impinge against the full width of at least one surface of the extruded film or sheet as it leaves the extrusion orifice. The polymer may be polyethylene terephthalate. The stream of gas may impinge only on the surface of the extruded film opposite to that which makes contact with the casting surface. The pressure may be reduced on the surface of the extruded film opposite to that upon which the gas impinges so that the gas is drawn round the edges of the sheet at the ends of the extrusion orifice. The stream of clean gas may impinge on the full width of both surfaces of the extruded sheet. The stream of gas may have temperature of between 400 and 650 F. The gas stream may be emitted from a series of uniform holes equally spaced along the length of the extrusion orifice and spaced therefrom between  and 5 inches. The invention prevents the undesirable build-up of deposits of foreign materials derived from the hot extruded polymer as it leaves the extrusion orifice.
Patent GB-688479-A (GB)
Title: Improvements in and relating to rolling mills
IPC: B21B31/18
Filed: 1950-02-03
Abstract: 688,479. Rolling-mills. BRIGHTSIDE FOUNDRY & ENGINEERING CO., Ltd., and UDALL, W. Feb. 5, 1951 [Feb. 3, 1950], No. 2902/50. Class 83 (iv). In a method of axially adjusting a rolling-mill roll 1, a supporting unit 3 axially fixed on the roll 1 is adjustable in an axial direction in the housing 5 by pairs of jaws 16, 17 adjustable about fixed pivots 13 on both sides of the roll axis and engaging projections 10 on the supporting unit. The jaws 17 are coupled by a turnbuckle 25 for adjusting the axial position of the rolls and each pair of jaws 16, 17 is coupled by eyebolts 18 for adjustment to engage the opposite faces of the flanges 10 which have hardened inserts 11.
Patent GB-884719-A (GB)
Title: Plasma discharge apparatus
IPC: H05H1/16
Filed: 1960-01-27
Abstract: 884,719. Thermonuclear apparatus; discharge apparatus. UNITED STATES ATOMIC ENERGY COMMISSION. Jan. 27, 1960 [Jan. 29, 1959], No. 2842/60. Classes 39(1) and 39(4) A method of forming an energetic ion plasma comprises establishing a magnetic field along the axis of an evacuated container, establishing magnetic minor fields at each end of the container, initiating and sustaining a gas fed arc discharge coaxial with the axis, and maintaining a radial potential gradient normal to the surface of the arc discharge to accelerate ions therefrom and electrons thereto. In Fig. 1 an anode 2 and cathode 1 are arranged on the axis of a cylindrical container 5, and two ring shaped cathodes 6, 7 and a cylindrical anode 22 are provided within the container. All the cathodes are of the gasfed type and may be supplied with deuterium and/or tritium from gas sources 18, 14 and 15. The discharge space is surrounded by coils 21 and minor coils 19, 20 are provided at each end. Electrodes 1 and 2 may be cooled by cooling tubes 107, 108 and baffles 111, 112 may be mounted in front of them; baffles and cooling coils (not shown) may also be provided for electrodes 6 and 7. The end spaces of the container 5 may be evacuated through ducts 25, 26 and the discharge space through duct 27. In operation gas is fed to the cathodes until the pressure at the cathodes reaches 3 x 10<SP>-3</SP>mm. and the discharges are initiated by connecting R.F. sources in parallel with D.C. sources to the electrodes; after the arcs are struck the R.F. sources are disconnected and the pressure in the discharge space is reduced to 5 x 10<SP>-5</SP>mm. the pressure in the end spaces being 3 x 10<SP>-4</SP>mm. A high potential difference of 20-50 kV is maintained between the arcs, the inner one being negative, for example, so that electrons diffuse from the inner arc to the outer one and ions from the outer to the inner. Either of the arcs may be replaced by a solid electrode as in Fig. 5 (not shown) or may be of hollow instead of solid form, Fig. 3 (not shown). Specifications 673,424, 853,916 and U.S.A. Specifications 2,197,079, 2,920,235 and 2,927,232 are referred to.
Patent GB-1237602-A (GB)
Title: Multi-ply fabric constructions
IPC: D03D25/00
Filed: 1969-01-17
Abstract: 1,237,602. Structural fabrics. COLLINS & AIKMANN CORP. 17 Jan., 1969 [5 Feb., 1968], No. 2967/69. Heading DIK. [Also in Divisions El and E2] A woven fabric for use in underwater structures consists of two plies 51, 52 joined together by binder warp threads 53, which are woven with the aid of wires 54 to produce a final spacing between the plies of say ¢ in. to 24in. The upper ply is loosely woven and may be buoyant so that the plies separate when immersed in water to facilitate filling with concrete. Materials mentioned for the yarns are polyethylene and foamed or unfoamed polypropylene or nylon.
Patent GB-175263-A (GB)
Title: Improvements in devices for attaching working sheets to rotating grinding and like tools
IPC: B24D9/04
Filed: 1922-02-01
Abstract: 175,263. Machovß, A. Rßz-. Feb. 9, 1921, [Convention date]. Wheels.-Emery cloth, emery paper, a brush band, or like working- sheet is attached to a rotating disc a by passing the joined ends through a slide e into an aperture b in the disc, wherein is mounted an angularly adjustable roller c, to which the ends are clamped by a spring tongue d. The ends of the roller have circular heads c<1>, c<3>, which fit into recesses in the disc, one head c<3> being connected to the roller by a screw c<2>, so that, by tightening this screw, the roller can be clamped in adjusted position. The heads are formed with slots for engagement by a spanner. To improve the grip upon the ends of the sheet, the free end of the tongue is formed with a bead, and a spring clipping-member d<1> is provided to co-operate with the tongue.