baber/WOPTO huggingface dataset:
Patent GB-671670-A (GB)
Title: Improvements in or relating to control valve arrangements
IPC: F15B13/04
Filed: 1949-03-24
Abstract: 671,670. Endless-belt conveyers. BORGWARNER CORPORATION. March 24, 1949. [March 26, 1948] No. 8041/49. Class 78 (i). [Also in Group XXIX] A control valve arrangement for regulating the flow of working pressure liquid to a motor, applicable to an endless conveyer for loading, e.g. coal, is characterised by an adjustable throttling valve between the liquid source and the motor, and a by-pass valve having three pressure-operated motive surfaces for directing varying portions of the liquid from the throttle valve to maintain the motor at constant speed irrespective of load variations. The supply of pressure liquid from an electric motor driven gear pump G, Fig. 1, passes from an inlet 21, Fig. 2, through a manually-operated throttling valve 25 to an outlet 22 leading to a motor M driving an endless conveyer 11. The speed of the motor and therefore the form of the discharge trajectory 11c, 11d, is set by the valve 25 and kept constant irrespective of the load by means of a by-pass valve 32 controlling the passage 23 to a sump S. As the load increases, the increased pressure at the outlet acts via the passage 34 on the back 33 of a spring-loaded piston and tends to close the by-pass valve so that more supply pressure passes to the motor. Similarly, a decrease in speed allows the supply pressure to open the by-pass. The area A2 of the back of the piston is predeterminedly greater than the closed area A1 of the valve, while a piston area A3 is provided to accelerate the opening movement of the valve.
Patent GB-959463-A (GB)
Title: Improvements in corner reflectors
Inventor: LOWERY PETER ALBERT
IPC: H01Q15/18
Filed: 1961-03-06
Abstract: 959,463. Radar reflectors. CHEMRING Ltd. April 11, 1962 [March 6, 1961], No. 8076/61. Drawings to Specification. Heading H4A. Foamed P.V.C. is moulded around an octahedral corner reflector to protect it from the effects of wind, rain and ice. The P.V.C. has an " open " or " closed " cellular structure and if " open " an additional P.V.C. outer sheath is provided. Since the moulded structure is fairly rigid the usual metallic supports for the reflector are replaced by elastic tape membranes. Specification 810,138 is referred to.
Patent GB-849487-A (GB)
Title: Improvements in or relating to electrostatic sound transducers
IPC: H04R19/00
Filed: 1957-03-13
Abstract: 849,487. Telephone instruments. TELEFUNKEN G.m.b.H. March 13, 1957 [March 14, 1956], No. 8224/57. Class 40 (4). A condenser microphone or loud-speaker comprises an apertured fixed electrode 1 made of aluminium and a vibratable diaphragm 2, the surface of the fixed electrode being chemically or electrochemically oxidized so as to provide a slightly conductive layer 4 which prevents the build-up of surface charges during operation. The diaphragm may be slightly spaced from the fixed electrode, Fig. 1 (not shown), or may be in part contact with a roughened oxidecoated surface as shown in Fig. 2. In a modification of the latter embodiment, Fig. 3, a synthetic resin insulating layer 5 is interposed between the oxide layer and the diaphragm 6. The oxide layer may be formed by application of a solution of soda and potassium chromate in water at a temperature of 90‹ C. and may alternatively be applied to a surface of the -diaphragm. Specification 335,248 is referred to.
Patent GB-1205122-A (GB)
Title: Process for the production of phosphoric acid
Inventor: LONG RAYMOND H
IPC: C01B25/22
Filed: 1968-02-20
Abstract: 1,205,122. Phosphoric acid. LUMMUS CO. 20 Feb., 1968, No. 8279/68. Heading C1A. Phosphoric acid is produced from phosphate rock by (a) treating finely divided rock with phosphoric acid in a digestion vessel at 70- 80‹ C., the acid having a concentration of 30- 40% P 2 O 5 , and being used in an amount to provide 1À9-2À6 kilos P 2 O 5 /kilo of P 2 O 5  in the rock; (b) continuously removing the digestion slurry and adding it to a nucleation vessel containing calcium sulphate hemi-hydrate and monocalcium phosphate in phosphoric acid, and treating with 50-85% of the stoichiometric amount of H 2 SO 4  required; (c) removing the nucleation slurry continuously to a reaction vessel containing calcium sulphate hemi-hydrate in phosphoric acid, where sulphuric acid is added to complete the stoichiometry, or up to 2% in excess or below this value; (d) removal of the reaction slurry, and (e) filtering the slurry. The temperature of the reaction slurry may be maintained either by preheating the phosphoric acid, or by recycling a portion of the reaction slurry, preferably in an amount to provide an additional 1À5-8 kilos of P 2 O 5 /kilo of P 2 O 5  in the rock. The sulphuric acid used may be 60-93% by weight. The reaction slurry may be at 93-116‹ C. Phosphoric acid obtained by washing the filtered calcium sulphate hemihydrate may be used as feed for the digester, or may be recycled to dilute the sulphuric acid in the nucleation or reaction stages. The reaction stage may be carried out in one or more steps.
Patent GB-721268-A (GB)
Title: Improvements in or relating to polyvinyl resin compositions containing organic basiclead salts
IPC: C08K5/098
Filed: 1950-07-28
Abstract: A polymer or copolymer of vinyl chloride is stabilized with from 0.25 to 10 per cent based on the weight of the polymer of a basic lead salt of an aliphatic dicarboxylic acid of the general formula CnH2n(COOH)2 or Cn + 1H2n (COOH)2 where n is an integer greater than or equal to 1, such as malonic, succinic, adipic, azelaic, sebacic, maleic or fumaric acid.  An example describes a composition comprising a vinyl chloride-vinyl acetate copolymer, dioctyl phthalate, and dibasic lead adipate, sebacate or maleate.
Patent GB-1299521-A (GB)
Title: Improvements in or relating to mills
IPC: B02C17/22
Filed: 1970-02-20
Abstract: 1299521 Tube mills SLEGTEN SA 20 Feb 1970 [5 March 1969] 8320/70 Heading B2A A tube mill comprises a lining made up of frusto-conical sections 24, 23 Fig. 3 of differing conicity arranged successively so as to exert a sorting action on the grinding balls, the larger balls being urged to migrate towards the feed end and the smaller balls towards the discharge end. The larger angle of conicity may be from 15 to 25 and the smaller angle from half to one third that of the larger. The height of a section at the transition region 8 is less than .05 the diameter of the mill and the length of the smaller angled core is between one and two times the height. The length of the larger cone is as great as conveniently possible. The lining members are corrugated and the corrugations are such that their sides penetrate into the bottom of the load of grinding media .10 without axially deflecting the media, Fig. 5. The plates are bolted at 24 to standard-drilled apertures. Three or more varying conicity sections may be used, and one section may be cylindrical.
Patent GB-416465-A (GB)
Title: An improved sheet metal bottle or can
IPC: B65D8/00
Filed: 1934-03-16
Abstract: 416,465. Cans. RETTMEYER, C., 426, Eiffestrasse, Hamburg, Germany. March 16, 1934, No. 8328. Convention date, April 1, 1933. [Class 66.] A sheet metal bottle or can for motor vehicle oil is of conical form and has a radially outwardly-projecting flange b at the mouth to which a cover is secured by soldering or by interfolding with the flange.
Patent GB-569112-A (GB)
Title: Operation of anion-exchange units
IPC: C13B20/14
Filed: 1943-05-25
Abstract: 569,112. Purifying water. RESINOUS PRODUCTS & CHEMICAL CO. May 25, 1943, No. 8332. Convention date, July 16, 1942. [Class 46] In the process of removing dissolved salts from water by passage first through a cationexchange material in the hydrogen form to substitute hydrogen for the cations, so giving free acids corresponding to the anions of the dissolved salts, and then through an anionexchange resin in the basic form to absorb such acids and wherein regeneration of the cation - exchange material and the anionexchange resin is effected by acid and an alkaline solution respectively, the rinsing of the regenerated anion-exchange resin is effected by acidic effluent previously drawn off from the anion-exchange resin while in the spent condition. For removal of acid from dilute solutions, an anion-exchange material alone is used and regenerated as above. Rinsing of the cation-exchange material is effected by raw water. The anion-exchange resin may be a gelled and heat-hardened phenol-formaldehydepolyalkylene polyamine condensate in basic form. Modified natural materials such as casein or leather which have free basic amino groups may be used as anion-exchange material. Regeneration may be effected by sodium, potassium, or ammonium hydroxides, sodium carbonate. The cation-exchange material may be a sulphonated organic solid, e.g. lignin, coal, cellulose, or a resin such as a sulphited quebracho-formaldehyde condensate, or a sulphonated phenol-formaldehyde condensate ; regeneration may be effected by hydrochloric, sulphuric or acetic acid. Specifications 556,622 and 557,414 are referred to.
Patent GB-1524444-A (GB)
Title: Compact overhead projector
IPC: G03B21/20
Filed: 1976-03-02
Abstract: 1524444 Overhead projectors MINNESOTA MINING & Mfg CO 2 March 1976 [3 March 1975] 08332/76 Heading G2J In an overhead projector, a light source 20, an aperture plate 21, a plane mirror 22, a Fresnel condenser lens 23, a stage 11, and a projection head 14 throwing an image on to a remote screen, are arranged along an optical axis A. The light source 20 comprises a lamp 26 within a part ellipsoidal reflector 28. The ellipsoid if completed would have two foci Fi, Fo. The filament 27 of lamp 26 lies on the axis of the ellipsoid, between the foci but near focus Fi. An apertured plate 21 is located between the foci but near focus Fo, and the aperture (which may be of circular or other shape and variable in size) is smaller than the crosssection of the high-intensity beam at that position. This is shown to improve both the evenness of illumination and the resolution of the image. The container for the light souce 26 and mirror 22 has air inlet and outlet louvres 24, 12, a fan (not shown) for circulating air, levers 17, 18 for adjusting the lamp and a switch plate 16. The projection head 14 is carried by a foldable arm (13) at the side of the container, Fig. 1 (not shown), so that apparatus packs conveniently.
Patent GB-745997-A (GB)
Title: Improvements in servo-operated hand brakes for road vehicles
IPC: B60T13/10
Filed: 1954-03-22
Abstract: 745,997. Fluid-pressure brakes. SOC. ANON. A. SAURER. March 22,1954 [May 16, 1953], No. 8335/54. Class 103 (1). In a fluid-pressure servo-operated hand brake mechanism, particularly for heavy road vehicles, it is arranged that when the hand is removed from the main hand lever 1, the servo force is also cut out, and there is thus no danger of the brake force being gradually reduced as the pressure drops off. This action is provided by a lever pivoted to the main hand lever 1, at 3 having a part 2 extending parallel to the lever 1 but kept away therefrom by a spring 13 so that a valve 11, controlling the supply of pressure fluid from a reservoir 35 to the servo cylinder 40, is held away from a valve pin 12. When pressure is applied to the handle 6 to move the lever 1 to apply the brake, the valve 11 is opened by engagement with pin 12 and the fluid pressure servo cylinder becomes operative but is de-energized as the hand is removed after locking of the lever 1 by the ratchet 9.
Patent GB-341338-A (GB)
Title: Improvements in and relating to rudders for toy submarines
IPC: A63H23/02
Filed: 1930-03-15
Abstract: 341,338. Boat, ship, &c. toys. BING WERKE VORM. GEB. BING AKT.-GES., 215, Regensburgerstrasse, Nuremberg, Germany. March 15, 1930, No. 8440. Convention date, Nov. 14, 1929. [Class 132 (iii).] The lateral rudder 2 of a toy submarine is frictionally mounted on a wire stirrup 1 and carries a slotted height rudder 8 rotatable about a pin 5 integral with the rudder 2, a projection 11 on a bracket 10 fixed to the rudder 8 allowing the latter to take up various inclinations by engaging in holes 11a, 11b, 11c.
Patent GB-765289-A (GB)
Title: Automatic apparatus for adjusting and testing polar electromagnetic relays
IPC: H04Q1/20
Filed: 1955-03-23
Abstract: 765,289. Electromagnetic relays. WESTERN ELECTRIC CO., Inc. March 23,1955 [March 24, 1954, No. 8451/55. Drawings to Specification. Class 38(5) A circuit for automatically adjusting and testing the permanent magnet bias of a polar relay having its fixed contact comprising the permanent magnet so that the relay operates and releases at desired current values, comprises a control circuit responsive to a, switch having two positions, in the first of which the control circuit connects a source of magnetizing current pulses to a coil magnetically coupled to the permanent magnet, the amplitude of these pulses being such as to overmagnetize the magnet, and in the second of which the control circuit connects to the coil a source of variable demagnetizing current pulses of gradually increasing magnitude, the control circuit also selectively connecting to the relay operating coil a source of reset'current of sufficient magnitude to maintain the armature of the relay on the contact being demagnetized during the application of the demagnetizing pulses, or connecting during intervals between the pulses a source of test current the magnitude of which is that required to release the armature from that contact when the relay is correctly adjusted, and a detector responsive to movement of the armature away from the contact to cause the control circuit to terminate the series of demagnetizing pulses. The Specification describes in detail two different circuits for performing the above operations with reference to a relay having two fixed magnetized contacts disposed to either side of the armature. In these circuits a detector is provided for each contact, the control circuit being such that the operation of the first detector to indicate release of the armature from the first contact causes the control circuit to apply demagnetizing pulses to the demagnetizing coil associated with the second contact and operation of the second detector to indicate release of the armature from the sceond contact causes the control circuit to re-apply demagnetizing pulses to the demagnetizing coil of the first contact, demagnetizing pulses being thus applied alternately to the two demagnetizing coils until the detectors indicate immediate release from each contact in turn, whereupon the adjustment is terminated. Specifications 648,656, 691,207 and U.S.A. Specification 2,590,228 are referred to.
Patent GB-789856-A (GB)
Title: Improvements in toy easels
Inventor: MCTEAR JAMES FRASER
IPC: A63H33/30
Filed: 1956-03-19
Abstract: 789,856. Easels. WILKANE, Ltd. April 5, 1956 [March 19, 1956], No. 8542/56. Class 52(3) An easel with front legs 1, 2 joined by a cross-bar 3 and a rear leg 5 carried on a first pin 4 has the cross-bar recessed at 7 to receive the edge of a blackboard 8 and the rear leg 5 has an extension 6 carrying a knob 9 which in the splayed position of the leg engages the upper edge of the blackboard to secure it against dislodgement.
Patent GB-150762-A (GB)
Title: Improvements in and relating to furnaces or kilns
IPC: F27B1/00
Filed: 1919-04-04
Abstract: 150,762. Anderson, R. J. April 4, 1919. Shaft furnaces; rotary furnaces; metallurgical furnaces; chemical manufactures, furnaces for.- Consists of a furnace or kiln adapted for the reduction of ores, for conversion of chemical compounds. manufacture of cement, and like operations. Fig. 1 shows the application to an iron or lead smelting blast furnace. Products of complete combustion from combustion chambers 41, 42, and products of incomplete combustion (including carbon monoxide) from combustion chambers 45, 46 are delivered into the charge, and in each combustion chamber the air and fuel are supplied in numerous crossing jets and in regulable proportions so that complete interaction coupled with precise regulation is obtained. Either gaseous, oil, or pulverulent fuel can beused. The cross-jetting is obtained as shown in connexion with the " primary " combustion chambers 41, 42, and diagrammatically in Fig. 5, by means of refractory air pipes 15 extending across the chamber and perforated all round, and by fuel jets 22 directed longitudinally of the chamber, and thorough mixture is further ensured by the staggered relation of the air pipes and of the fuel jets, as shown in Fig. 5, and by the fact that both air and fuel jets are in planes substantially at right-angles to the outlet from the chambers. Fig. 7 shows the application to a rotary furnace for conversion of heavy chemicals, and more particularly designed for the manufacture of sodium sulphide from sodium sulphate. Gases issuing at 92 at an upper level from the " primary " combustion chamber serve mainly to heat and soften the oncoming charge while gases of incomplete combustion issuing at 93 from the " secondary " combustion chamber at a lower level effect the desired reduction to sodium sulphide. The completed product is discharged at 91.
Patent GB-828862-A (GB)
Title: Improvements in or relating to electrical information storage systems
IPC: H04N5/257
Filed: 1957-03-15
Abstract: 828,862. Statistical apparatus. WESTERN ELECTRIC CO. Inc. March 15, 1957 [March 26, 1956], No. 8623/57. Class 106 (1). [Also in Group XL (b)] In apparatus in which information recorded photographically on a slider 23 is sensed by projecting light from the screen of a cathoderay tube 14 through a lens 22 on to the slide, the information is recorded by the use of coloured as well as opaque and transparent areas and is passed from the slide to an output register 30 via dichroic mirrors 24-26 and photo-cells 27- 29. A three-colour system with colour combinations and a binary code may be employed. The particular address on the slide 23 is determined by an input register 15. Specification 789,660 is referred to.
Patent GB-526510-A (GB)
Title: Improvements in the manufacture of hard or highly viscous insulating materials
IPC: H01B3/18
Filed: 1939-03-18
Abstract: 526,510. Bituminous &c. compositions. HENLEY'S TELEGRAPH WORKS, CO., Ltd.,W. T., TUNSTALL, H. A., and POLLETT, W. F. O. March 18, 1939, No. 8688. [Class 22)] Hard or highly viscous electric insulating materials of the kind described in Specification 417,845 and consisting of a substance containing free organic acid, a liquid vehicle or diluent and a base capable of reacting with the free acid contain, in addition, a dehydrating agent such as quicklime, strontium or barium oxides, anhydrous calcium sulphate, calcium sulphate hemihydrate, silica gel or active carbon or alumina. Specification 526,511 also is referred to.
Patent GB-511550-A (GB)
Title: Improvements in optical projection apparatus
IPC: B64F1/20
Filed: 1938-03-22
Abstract: 511,550. Baffled louvres, for projector lamps. GENERAL ELECTRIC CO., Ltd., and THOMAS, E. R. March 22, 1938, No. 8766. [Class 75 (iv)] In optical projection apparatus baffled louvres having interior glossy black surfaces, e.g., black stove enamelled, are used to give a sharp cutoff of light on one or both sides of the-louvres, the design being based on the assumption that for glancing angles greater than an angle a the light reflected is negligible. In Fig. 3 baffles 6 subtend angles a at lines on the louvres 1 midway between. In Fig. 6 baffles 6 are forwardly inclined at an angle a/2 to the louvres 1; in Fig. 7 rearwardly inclined at an angle a- /2 , #, (dependent on the length of the louvres), being in all cases the angle of cut-off above the upper louvre and d1, the projected distance apart of the baffles in the two latter cases, being always less than h cot a where h is their height. Specification 488,472 and U.S.A. Specification 1,878,632 are referred to.
Patent GB-861380-A (GB)
Title: Improvements in or relating to compositions containing cycloheximide
Filed: 1958-03-19
Abstract: A fungicidal composition comprises cycloheximide and a solubilized lignin, e.g. lignosulphonate of an alkali metal including ammonium or an alkaline earth including magnesium or a lignate of an alkali metal including ammonium preferably in the proportion of about 1000 to 4000 parts of solubilized lignin for each part of cycloheximide. Surface-active agents, e.g. hydrocarbon sulphonate or a carboxy hydrocarbon sulphonate or an alkyl phosphate preferably in a proportion of between 50 to about 500 parts of each part of cycloheximide may also be incorporated. The composition may be in two parts, one part containing the cycloheximide in a water-dispersable powder isolated from the other part containing the solubilized lignin admixed with a liquid surfactant in a single packaging unit so that on mixing with water the spray mix is obtained.  Insecticides, fungicides and bactericides, a citrate or phosphate buffer salt, spreaders and stickets may also be incorporated.  Specifications 639,943 and 644,919 are referred to.
Patent GB-669197-A (GB)
Title: Improvements in soot-blowers
IPC: F28G3/16
Filed: 1949-04-01
Abstract: 669,197. Joints for sootblower tubes. WILSON, A. M. July 13, 1950 [April 1, 1949], No. 8873/49. Class 99 (i) In a soot blower of the type including a supported conduit 3 as the means whereby the cleaning medium is ejected upon the tubes or other parts to be cleaned, the conduit having a number of nozzles at intervals throughout its length and being supported so that it can be given a turning motion about its axis in order to direct the cleaning medium over as large a surface as practicable and having a connection between the operating appliance and the nozzle conduit 3 made as a universal joint which comprises a tubular connector 4, 5, 6, approximately co-axial with the appliance and conduit, end parts on the connector having part-spherical convex surfaces, end attachments 7, 8, each secured to the connector and respectively secured to the operating appliances and nozzle conduit, and fittings 9 in the attachments having part-spherical concave surfaces which make fluid-tight joints with the convex surfaces and hold the connector against endwise movement relative to the operating appliance and conduit, there is provided means, such as projections 12 and grooves 13, between each attachment and the connector for transmitting the turning motion from the operating appliance to the nozzle conduit. Although in the embodiment shown the nozzle conduit rotates, but does not move axially the universal joint is capable of transmitting to and fro endwise movement to the conduit if desired. Specification 504,925 is referred to.
Patent GB-996928-A (GB)
Title: Improvements in or relating to products made of mineral fibres
Inventor: HOLDEN DEREK JOSEPH
IPC: B29C51/08
Filed: 1963-03-06
Abstract: 996,928. Moulding fibre - resin articles. FIBREGLASS Ltd. June 8, 1964 [March 6, 1963], No. 8892/63. Heading B5A. Articles are moulded from a fibre-resin mat located between co-operating heated male and female dies, the mat being initially supported over the female die by a cushion of air so that procuring of the outside surface of the mat due to premature contact with the female die is prevented. When the dies are heated electrically as in Fig. 1, the mat 3 is supported prior to the moulding operation by blasts of air issuing through orifices 1B in the female mould 1, the male die being lowered quickly to force the mat into the female die against said blasts of air, which are stopped upon complete closure of the dies. When the dies are heated by a fluid (see Fig. 2, not shown), the sheet is supported by air from nozzles located around the perimeter of the female die.