baber/WOPTO huggingface dataset:
Patent GB-701699-A (GB)
Title: Improvements in and relating to air-operated hydraulic pumps
Inventor: MACKENZIE KENNETH ORD
IPC: F01L25/06
Filed: 1950-12-28
Abstract: 701,699. Regulating reciprocating pumps. KOMAC, Ltd. Jan. 25, 1952 [Dec. 28, 1950], No. 31459/50. Class 102 (1). In a control unit for controlling an airoperated hydraulic pump having a self-reversing, double-acting, air-operated piston slidable in a cylinder to impart pressure to the hydraulic cylinder of the pump, a change-over valve is adapted selectively to supply the air cylinder either with air at high pressure or with air at low pressure according to the hydraulic pressure produced by the pump. As shown, a changeover valve A, Figs. 1, 3, having high and low pressure air inlets 2, 3 respectively and an outlet connection 4 to the hydraulic cylinder is provided with a slide valve 23 connected by a rod 22 to a piston 21 slidable in a cylinder 20. The piston 21 is controlled by a diaphragmactuated control valve B, Figs. 1, 2. The valve B comprises a two-part casing 13, 14, clamping between its parts a diaphragm 9 carrying a valve member 16 and a plunger 11. In opera- . tion, air at low pressure supplied to the upper side of the diaphragm 9 from a pressure-reducing valve 7 opens the valve 16 to supply low pressure air through a line 28 to the cylinder 20 whence the piston 21 moves the valve 23 upwards to connect the high pressure inlet 2 from the main 6 to the outlet 4 to supply the doubleacting, air-operated piston operating the pump with high pressure air. The hydraulic pump pressure which is rapidly built up is transmitted through a port 34 in the valve B to act on the plunger 11 and when a predetermined hydraulic pressure is reached the diaphragm 9 is moved upwards to close the valve 16. Air in the cylinder 20 is then vented to atmosphere through the line 28 and a' port 5 and the high pressure air acting on the larger upper surface of the valve 23 moves this valve downwards to connect the low pressure inlet 3 to the outlet 4 to slowly continue the pumping operation until the total load on the air-operated piston equals the hydraulic load whence the air-operated piston comes to rest. In a modification, the inlet 3 and outlet 4 are reversed in which case the valve 16 is arranged to close under the action of the low pressure air. In a further modification, the cylinder 20, piston 21, and valve 16 are dispensed with, the diaphragm 9 then being directly connected to the valve 23.
Patent GB-509758-A (GB)
Title: Improvements in or relating to cinematographic apparatus
IPC: G03B41/08
Filed: 1937-11-16
Abstract: 509,758. Kinematograph apparatus. BAIRD TELEVISION, Ltd., and BAIRD, J. L. Nov. 16, 1937, No. 31490. [Class 97 (i)] In intermittent-feed apparatus comprising an optical compensator operative during the feed movements, the compensator comprises an oscillating light refracting device which is withdrawn from the light path while the film is stationary; the compensator may be a block of glass or synthetic resin and may be replaced in the beam by a non-oscillating block while the film is stationary. As shown, the compensator in a projector comprises a block 7, and a second oscillating block 6 displaces the light beam falling on the film 4 from a source 1. The blocks 6, 7 rock simultaneously in opposite directions, are removed from the beam when the feed claw disengages the film, being there replaced by non-oscillatory blocks, are rocked to their original positions, and are again moved into the beam when the feed claw re-engages the film A condenser 2 focuses light from the source 1 on an aperture 3, and a lens 5 focuses an image of this aperture on the film.
Patent GB-637511-A (GB)
Title: Device for weaving in gauze weave
IPC: D03C7/04
Filed: 1946-10-25
Abstract: 637,511. Leno shedding mechanism. DIEDERICHS, R. H. Oct. 25, 1946, No. 31745. Convention date, Feb. 18, 1942. [Classes 142 (i) and 142 (ii)] A leno harness comprises thin blanks d on a carrier c which oscillates them through 90 degrees about an axis coinciding with the inner end of a slot k ; a standing warp thread a passes through the slot k and a crossing warp thread b passes through a V-shaped slot i, the threads also passing through heddles m, s. To minimize chafing of the warp threads, the heddle m swings about the axis of the blanks and the heddle s swivels about the fell c. The warp threads a and b pass over separate back rests, which are coupled to the corresponding heddles m, s whereby they are oscillated to keep the tensions of the warp threads constant during shedding.
Patent GB-1032235-A (GB)
Title: Improvements in and relating to semiconductor thermometers
IPC: G01K7/01
Filed: 1963-08-12
Abstract: 1,032,235. Semi-conductor devices. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Aug. 12, 1963 [Aug. 13, 1962], No. 31752/63. Heading H1K. [Also in Division G1] A diode has a junction exhibiting a sharp breakdown at a reverse voltage dependent upon the junction temperature, and at the onset of breakdown current pulses traverse the junction. By adjusting the reverse voltage until pulses with a predetermined characteristic are passed temperatures may be determined (see Division G1). Indium is alloyed to an N-type germanium wafer and the diode is subjected to a plurality of etching steps to remove active centres near the edge of the junction, and to activate another centre in the interior of the crystal. A centre may be introduced by exerting pressure over a small area or by producing an area of high doping, e.g. by a second alloying step. The diode may be enclosed in a transparent glass envelope so that light falling on the diode provides free carriers, particularly when measuring low temperatures.
Patent GB-170501-A (GB)
Title: Improved apparatus for obtaining illusory effects
IPC: A63J21/00
Filed: 1920-11-10
Abstract: 170,501. Kenwin, G. Dickson-. Nov. 10. 1920. No Patent granted (Sealing fee not paid). Conjuring.-A ball D is made to travel over a cloth B covering an horizontal or inclined board A, without any visible means of moving, by placing it above a ring C which can be moved by concealed strings c, c<1> between the cloth B and board A. In a modification, a ring is made to roll along a track by similar means.
Patent GB-1218010-A (GB)
Title: Cross slide cutter block assembly
Inventor: PAPP MICHAEL WILLIAM
IPC: B23Q1/28
Filed: 1969-06-24
Abstract: 1,218,010. Tool holding assembly. WARNER & SWASEY CO. 24 June, 1969 [27 June, 1968], No. 31908/69. Heading B3T. A tool holder assembly 18 comprises a body portion 30 in which there is provided a slot 54 for receiving a cutting tool 16, a base portion 34 with a dovetail slot 36 extending transversely to the tool slot and clamping means adjacent the dovetail slot for clamping the assembly in an adjusted position on a cross slide in a machine tool. The clamping means includes a plate member 88 guidingly located on pins 104 so as to be movable normal to the inclined side of the dovetail slot, the member being actuated by a pivotable member 92 operated by a rod and screw 116, 112 which extends at right angles to the top surface 126 of the body portion 30, actuation of the clamping member 88 being effected by rotation of the screw 112 in the body portion. The cutting tool may be laterally adjusted in the slot 54 by screws 64, 66 and clamped in the slot by screws 60.
Patent GB-1439146-A (GB)
Title: Recording of kossel lines
IPC: G01N23/205
Filed: 1972-07-07
Abstract: 1439146 Cathode-ray tubes NATIONAL RESEARCH DEVELOPMENT CORP 15 June 1973 [7 July 1972] 31961/72 Heading H1D [Also in Division H5] Kassel lines, produced by the irradiation of a crystalline specimen with a beam of fundamental particles to generate divergent X-rays from a point source within the specimen, are recorded by placing a recording medium parallel to, but spaced from the particle beam at its point of incidence on the specimen. As described, the specimen 16 is mounted in a scanning electron microscope into which projects a camera body 4 of polymeric material. A cylindrical aluminium cassette 17, which can be slid into the camera body, is closed by a light opaque beryllium plate 18 against which a film 19 is pressed by an inner cylindrical aluminium cylinder 20 which slides within cassette 17. By adjusting the angle of tilt of the specimen 16, either back reflection or transmission of the beam may be employed, and the beam may or may not be scanned. The use of a set of pre-calculated charts for interpretation of the results, by fitting the charts to the observed pattern, is described (Fig. 3, not shown).
Patent GB-742041-A (GB)
Title: Improvements in or relating to the production of toluic acids
IPC: C07C51/487
Filed: 1953-11-19
Abstract: Purified toluic acids are isolated from impure toluic acids prepared by the liquid phase, air oxidation of xylenes and which are associated with close-boiling impurities, by heating the impure toluic acids in liquid phase at 230-315 DEG  C. and at atmospheric or superatmospheric pressure for a period of time sufficient to effect decomposition or polymerization of the impurities, removing low boiling materials and water from the heating zone and then distilling the heated mixture to recover purified toluic acids.  The crude toluic acid mixtures (90-98 per cent acids) obtained by vacuum distillation from the oxidation products, contain varying amounts of neutral materials formed during the oxidation and boiling within the boiling range of the toluic acid isomers.  The period of heat treatment varies with the temperature used and also with the particular impurities in the toluic acid mixture, but is usually between 10 and 60 minutes. The distillation of the heat-treated material is preferably under vacuum and below 240 DEG  C. to avoid further decomposition.  In examples various crude toluic acid mixtures are purified by the process of the invention.  Specification 739,299 is referred to.
Patent GB-740869-A (GB)
Title: Improvement in method and apparatus for blowing sand moulds and cores
IPC: B22C15/24
Filed: 1953-11-19
Abstract: 740,869. Moulding- machines. FEDERAL FOUNDRY SUPPLY CO. Nov. 19, 1953 [Aug. 3, 1953], No. 32111/53. Class 83 (1). In a method of sand mould and core blowing, the receptacle is prefilled with sand at a relatively low blowing pressure and the sand is subsequently rammed at a higher blowing pressure. The higher blowing pressure may be applied continuously or intermittently. The apparatus comprises a base 10, and a cross-head 11 on columns 12, 13. A sand-transfer chamber 14 is pivotally supported on the column 12 and comprises an inner perforated partition 30, a blow-plate closure 38 with vents 34 and a sand agitator 35 driven through gearing 36, 37. The blow-plate is connected to a vent-plate 40 having blow-hole bushes 45 which may be replaced by plugs 46 which block the opening through the blow-plate but vent the box to the atmosphere. Pressure-fluid enters the chamber by an inlet 33 through a valve 49, and exhausts through a filter 27 and exhaust opening 28 controlled by a piston 29. In operation, and with a selector switch in one position, the box is clamped against the chamber 14 by opening valve 25, a pressure-controlled switch 69 closing when a predetermined clamping pressure is reached. Actuation of a start button then energizes solenoids 80, 81 actuating valves 55, 61 respectively to admit pressure fluid from a restricted supply conduit through an adjustable throttle-valve 59 and inlet 33 to cause sand to fill the box under a reduced pressure and also to close the exhaust 28. When the box is filled, build up of pressure in the chamber 14 actuates a pressure-switch 67 to de-energize the solenoids 80, 81 and energize solenoid 87, actuating valve 55 which opens valve 49, and hence the chamber 14, to full fluid-pressure. When the pressure in the box 21 reaches a predetermined value, a pressure switch 71 actuated thereby de-energizes the solenoid 87, closing valve 49 and opening exhaust 28, interrupting the ramming until the pressure falls. Thus the sand is rammed intermittently until the operating circuit is opened. With the selector switch in an alternative position, ramming at high pressure, once started, is continuous. Closing of another switch in the circuit causes the sand to be blown at high pressure, continuously and intermittently, without prefilling. In a modification, a timer mechanism controls the period of prefilling.
Patent GB-746521-A (GB)
Title: Improvements in method of treating arsenical sulphide cobalt ores
Inventor: LICHTY LYALL JOHN
IPC: C22B1/06
Filed: 1953-11-19
Abstract: Cobalt arsenical sulphide ores containing iron are treated to produce a solution containing most of the cobalt and having a ratio cobalt:iron of at least 4:1 by weight; the process comprising treating the material to form a matte containing not more than 3 per cent of arsenic preferably in an electric furnace at a temperature high enough to vaporize the arsenic and arsenic sulphides, crushing the matte until at least 80 per cent of it is minus 200 mesh and then subjecting it to an oxidizing roast to eliminate most of the sulphur, sulphating the roasted material and then subjecting it to a second roast in the presence of air between 575 DEG C. and 650 DEG C. until a solution obtained by leaching the roasted material with water has a ratio of cobalt:iron of at least 4:1.  Roasted matte may be recycled by adding it to the ores supplied to the electric furnace, and the treatment of an ore concentrate containing also silver, nickel, and copper to produce a solution containing their sulphates is described. U.S.A. Specification 1,590,525 is referred to.ALSO:Cobalt arsenical sulphide ores containing iron are treated to produce a solution containing most of the cobalt and having a ratio cobalt: iron of at least 4:1 by weight; the process comprises treating the material to form a matte containing not more than 3 per cent of arsenic, preferably in an electric furnace at a temperature high enough to vaporise the arsenic and arsenical sulphides, crushing the matte until at least 80 per cent of it is minus 200 mesh and then subjecting it to an oxidising roast to eliminate most of the sulphur, sulphating the roasted material and then subjecting it to a second roast in the presence of air between 575 DEG C. and 650 DEG C. until a solution obtained by leaching the roasted material with water has a ratio cobalt: iron of at least 4:1.  Roasted matte may be recycled by adding it to the ores supplied to the electric furnace, and the treatment of an ore concentrate containing also silver, nickel and copper is described.  U.S.A. Specification 1,590,525 is referred to.
Patent GB-607616-A (GB)
Title: Nickel base alloy
IPC: C22C19/05
Filed: 1945-11-28
Abstract: A nickel base alloy consists of:-Al : 1.0-9.0 per cent, Cr: 13.0 to 27.0 per cent, Co: over 10 but not over 35 per cent, Ti: 0.01 to 5.0 per cent, Si: 0 to 2.0 per cent, C: 0 to 1.5 per cent, N: 0 to 0.5 per cent, Fe and/or Mn: 0 to 3.0 per cent, Mo and/or W: 0 to 8.0 per cent, Ta plus Nb: 0 to 4.0 per cent, Ni remainder and at least 30 per cent, but if the content of Mo or W or both together does not exceed 5 per cent and the content of Ni plus Co is 45 per cent or more, the ratio of the content of Ni plus Co to the content of Al+Si+2 Ti does not lie between 11:1 and 20:1. Up to a total of 0.5 per cent of one or more of the elements Mg, Ca, B, Ba, Sr and Zn, Ce and the other rare earth elements may be added.  One or more of the elements V, Zr, Cu, Be, Ag, Sb and Sn, but not more than 1 per cent of any one or 2 per cent in total may be added.  The alloy may be worked at 1200 DEG to 1300 DEG C., soaked at 1020 DEG  to 1100 DEG C. for 8 to 30 hours and then quenched or cooled in air and aged at 650 DEG  to 850 DEG C. from 8 to 30 hours.
Patent GB-505855-A (GB)
Title: Improvements in and relating to motor-driven tractors
IPC: B60K17/28
Filed: 1937-11-23
Abstract: 505,855. Tractors; driving-gearing. WOOD, R. L. Nov. 23, 1937, No. 32229. [Classes 79 (i), 79 (ii), and 79 (iii)]. A tractor is provided with a transverse countershaft h mounted in the usual rear axle s and driven by the propeller shaft through differential gearing, the ends of the countershaft having pinions driving road wheels n mounted on the ends of a hollow-axle casing p of conventional design, the two casings p, s being rigidly secured together side by side to the chassis. In the construction shown the casings are secured together by bolts r and to the chassis by U bolts t. The wheels n are mounted on solid ends inserted in the casing p and are provided with internally-toothed rings k meshing with the pinions j. One of the pinions is slidable out of mesh with its toothed ring k so as to disconnect the drive to the road wheels when it is desired to drive auxiliary machinery; the pinion is slid for this purpose by a handle w'. A pinion y<2> engaging the crown wheel of the differential gear drives a shaft y having a pulley or sprocket wheel z, or a coupling, universal joint or flexible shaft for driving any desired apparatus, the pulley &c. being controlled by an internal brake applied by means of a cable z<1>. A mower, potato-digging machine or saw may be combined with and driven by the tractor, the mower drive including a clutch which will slip or yield if the cutter meets abnormal resistance.
Patent GB-1439012-A (GB)
Title: Display units
IPC: A47F5/00
Filed: 1973-07-06
Abstract: 1439012 Brackets A H ROBINS CO Inc 6 July 1973 [27 April 1973] 32365/73 Heading A4B A bracket 20 has a horizontal limb 24 provided on its underside with an adhesive strip 18 comprising pressure sensitive adhesive tape with a peeloff protective cover strip by means of which the bracket may be secured to the top surface of a shelf 48 or the like at an edge thereof, the bracket including a depending limb 32 for overlying the front edge of the shelf, the depending limb 32 including a boss 34 with a socket 36 which in use receives a part 4 of a display unit. The bracket may include a raised part 30 defining a space 52 which in use may accommodate a raised lip along the shelf edge. The display unit may comprise a cantilever bracket 10 which may in turn support a drum-like article support for rotation about a vertical axis. The part 4 may serve as a pivot pin whereby the display unit be rotated above the vertical axis of the socket 36.
Patent GB-787428-A (GB)
Title: Improvements in or relating to cathode ray tubes
Inventor: WARREN GEOFFREY WILLIAM
IPC: H01J29/48
Filed: 1954-11-09
Abstract: 787,428. Cathode constructions. GENERAL ELECTRIC CO. Nov. 9, 1955 [Nov. 9, 1954], No. 32415/54. Class 39(1). The thermionic cathode of an electron gun comprises an apertured cup- or box-shaped portion 8, the inner faces 15 of which are coated with emissive material, and the modulating electrode 21 is a stiff metal conductor extending through the wall of the cathode with its tip in proximity to the aperture 18 so as to control the number of electrons flowing to the anode. A partition 13 separates the heater chamber from the emissive chamber. The end face of the cathode is shaped as a re-entrant cone having a semi-apical angle of between 55 degrees and 75 degrees' determining whether the beam is parallel shaft divergent or slightly convergent. The anode may also be re-entrant. In a cathode for producing three separate beams in a colour television tube there are three modulating electrodes 21, 22 and three apertures 18 arranged at the corners of an equilateral triangle or in a straight line. Specification 767,446 is referred to.
Patent GB-160918-A (GB)
Title: A new and improved cooking and heating stove
IPC: F24B1/28
Filed: 1919-12-29
Abstract: 160,918. Verity, C. H. Dec. 29, 1919. Combined open fire-places and cooking-stoves comprise a closable open grate with a superposed oven and side hobs adapted to be hidden from view by hinged or sliding panels. The stove shown comprises a barless grate 10 with a front 24 of adjustable inclination and preferably two independent boilers 11, 12 at the rear for hot-water supply and for heating radiators. The oven 13 rests on a perforated cast - iron plate 18 above the grate and is provided with a door 17 resembling a canopy and a ventilator 60. The front of the fire may be completely enclosed by a blower 25 formed of sheet - iron with a central laver of asbestos or the like 28, Fig. 7. The gases may be caused to pass from the back of the fire either over the boilers into a central vertical flue 31 controlled by a damper 33, or into flues beneath the boilers leading to vertical flues on each side of the flue 31 and with separate dampers. Flues 43 controlled by dampers 46 lead from the sides of the grate to beneath side hobs 14, 15, whence the gases pass up flues 42 to the top of the oven and thence to the chimney flue 32. Hinged or sliding doors 48 close in the space above the hot-plates and may be arranged to close the dampers 46 automatically when they are shut. The hob flues 43 are each formed of three specially-shaped firebricks 55, 56, 57, and may be reinforced with a metal lining where they open into the grate. Ventilating-tubes 59 lead from above the hotplates to the flue 32.
Patent GB-899382-A (GB)
Title: Process for the production of copolymers of vinyl chloride and fumaric acid esters
IPC: C08F214/06
Filed: 1959-09-24
Abstract: 899,382. Vinyl chloride-fumarate ester copolymers. WACKER-CHEMIE G.m.b.H. Sept. 24, 1959 [Sept. 24, 1958], No. 32582/59. Class 2(6) A process for preparing vinyl chloridefumarate ester copolymers comprises forming an aqueous polymerization reaction medium containing a hydroxyalkyl cellulose as reaction medium together with at least 80 mol. per cent of vinyl chloride and at most 20 mol. per cent of a fumarate ester of molecular formula C n H 2n-4 O 4  where n is an integer from 14 to 44, and causing the monomers to undergo copolymerization. The copolymers obtained may be shaped without the addition of plasticizer or softening agent. Both carboxyl groups in the fumarate ester need not be esterified with the same alcohol, and mixed esters formed from 2, 3 or even 4 alcohols may be used provided that the mixed ester falls within the given formula. The preferred hydroxyalkyl cellulose is a hydroxyethyl cellulose which in 5 wt. per cent aqueous solution has a viscosity of 100 to 500 poises/20C. of the concentration thereof is preferably not greater than 0À5 wt. per cent of the monomers and 0À3 wt. per cent of the aqueous phase. The pH of the aqueous phase is desirably maintained between 4À5 and 8; sodium bicarbonate or a phosphate salt may be used as buffer. The whole monomer mixture is preferably charged to the reaction vessel before polymerization commences. The catalyst may be any of those used to prepare polyvinyl chloride, preferably di-lauroyl peroxide. Examples contrast the properties of copolymers of vinyl chloride and di(2-ethylhexyl) fumarate or dilauryl fumarate prepared according to the invention with (i) a vinyl chloride/di(2- ethylhexyl) maleate copolymer prepared using partially acetylated polyvinyl alcohol as protective colloid, (ii) a vinyl chloride/di(2-ethylhexyl) fumarate copolymer prepared similarly to (i), or using methyl cellulose as colloid.