baber/WOPTO huggingface dataset:
Patent GB-969711-A (GB)
Title: Improvements in or relating to a process for the continuous acylation of amylose
IPC: C08B33/02
Filed: 1962-11-02
Abstract: In a process for continuous acetylation of amylose, an aqueous suspension containing 1-20% by weight of retrograded amylose is mixed with a vinyl ester of a monocarboxylic acid, and the mixture subjected to a temperature of 330 DEG F. to 360 DEG F. at a pressure of 100 p.s.i.-145 p.s.i. in presence of an alkaline catalyst to effect uniform dispersion and acylation of the amylose. "Amylose" is defined as the amylose resulting from fractionation of a non-granular starch, a preponderance of the amylose being at least a partially retrograded form.  Vinyl esters specified are vinyl formate, acetate, propionate and butyrate.  Specified catalysts are hydroxides, carbonates, borates, and sulphates of alkali metals, lower alkyl tertiary amines e.g. triethylamine and quaternary ammonium hydroxides. The preferred apparatus for the reaction is one which allows steam under pressure to be injected into a continuous stream of amylose which is then pumped into a pressure reaction vessel, temperature and pressure being controlled by adjustment of a valve in the pressure vessel through which the cooked solution flows into another container.  Examples disclose the preparation of amylose formate, acetate, propionate and butyrate.
Patent GB-1008219-A (GB)
Title: Conductor bar assembly
IPC: B60M1/16
Filed: 1963-10-22
Abstract: 1,008,219. Supporting conductors. O. EVANS. Sept. 23, 1964 [Oct. 22, 1963], No. 417l6/63. Heading H2C. [Also in Division H1] An overhead 8-shaped conductor bar 3 is held in a U-shaped hanger clamp 9 by two jaws 9a engaging depressions 7 in the insulating sheath at a position near the lower face of the bar, so as to avoid piercing the sheath when the clamp is tightened. The interior projections 4a on the sheath stop the conductor from falling out. The whole clamp is insulated from its support spindle 11 by an insulator 12. Specification 885,765 is referred to.
Patent GB-903775-A (GB)
Title: Improvements in amplifier circuits
IPC: H04N3/22
Filed: 1958-12-24
Abstract: 903,775. Automatic voltage control systems. SYLVANIA ELECTRIC PRODUCTS Inc. Dec. 24, 1958 [Dec. 30, 1957], No. 41774/58. Class 38 (4). [Also in Group XL (c)] The output current of a sawtooth wave amplifier is maintained constant by comparing a voltage dependent on the output current with a reference voltage and using the resulting difference to control the gain of the amplifier. The Figure shows a line time-base circuit comprising a driver valve 94, scanning coils 54 and damper circuit 50. A winding on the output transformer provides a voltage on the grid of a control valve 66 and further winding 46 provides a H.T. voltage on the anode. If the grid voltage exceeds a reference voltage developed across a gas discharge tube 80 in the cathode circuit, the valve conducts and develops a voltage across a smoothing capacitor 32. This voltage is applied to the grid of the driver valve 94 in such a sense that it tends to maintain the output of the sawtooth generator constant. A further feedback may be provided from the screen grid through a capacitor 102 to prevent hunting.
Patent GB-1388936-A (GB)
Title: Chloroisocyanuric acids
IPC: C07D251/36
Filed: 1972-09-11
Abstract: 1388936 Chloroisocyanuric acids FMC CORP 11 Sept 1972 [14 Sept 1971] 42069/72 Heading C2C  Trichloroisocyanuric acid is obtained by the chlorination of an aqueous solution containing a salt of dichloroisocyanuric acid at a pH of 2À5-3À5 at a temperature of at least 0 C. Preferably a substantially saturated solution of the Na or K salt is reacted at 0-30 C., pH 2À6-2À9. The aqueous solution may be the effluent of a process for producing a salt of dichloroisocyanuric acid by (a) reacting cyanuric acid and a suitable base and chlorinating the product of said reaction to produce dichloroisocyanuric acid and (b) neutralizing at least a portion of said acid with a suitable base to produce a salt of dichloroisocyanuric acid. Thus dichloroisocyanuric acid per se and salts thereof can be obtained in addition to trichloroisocyanuric acid in such a combination process.
Patent GB-1002233-A (GB)
Title: Coupling for trailers, more particularly trailers provided with driving wheels
IPC: B62D59/02
Filed: 1963-10-25
Abstract: 1,002,233. Tractor/trailer couplings. LIHNELL VAGN A.B. Oct. 25, 1963 [Oct. 25, 1962], No. 42156/63. Heading B7T. A tractor/trailer universal joint coupling comprises, arms 3 and struts 5, 6 secured to a ring 4 and pivoting about pins 2, and a ring 12 bolted to the ring 4, Fig. 6, and mounted to turn on bearing members 10 in a grooved ring 8, the ring 8 being connected by arms 17, 18 to pivots 19 and arms 23, 24 connected to the draw-bar 22. A central opening 14 is provided in the ring 12 for a power take-off 15 to drive the trailer wheels. The members 10 may be of other cross-sectional shapes or may be formed of balls.
Patent GB-1422123-A (GB)
Title: Waterproof sheeting
IPC: C09J7/38
Filed: 1972-09-12
Abstract: 1422123 Coated sheet material COAL INDUSTRY (PATENTS) Ltd 5 Oct 1973 [12 Sept 1972] 42221/72 Heading B2E [Also in Divisions B5 and C3] A waterproofing material comprises a flexible waterproof sheet comprising a mixture of at least 10% by weight of a first bituminous material and at least 15% by weight of a first thermoplastic polymer compatible with the first bituminous material, and, adhering to at least one face thereof, a continuous layer of a pressure-sensitive composition comprising a second bituminous material and at least one second polymeric material compatible with the second bituminous material, the second bituminous material being of the same genus as the first bituminous material, the layer of adhesive composition having a thickness of at least 1 mm. The bituminous materials may be of petroleum origin or coal origin. The first thermoplastic material may be a vinyl chloride, ethylene or propylene homopolymer or copolymer. The composition from which the flexible waterproof sheet is produced may also comprise a fibrous or particulate filler, a natural or synthetic rubber and a migratory or non- migratory plasticiser. The second polymeric material may be an unvulcanised or partially vulcanised rubber, polyvinyl chloride, polyethylene polypropylene, a copolymer of vinyl acetate with ethylene or polystyrene, and the bituminous material used in the adhesive composition is preferably a coal digest. The adhesive may also contain a tackifier, e.g. a coumaroneindene resin, aromatic hydrocarbon/formaldehyde condensation resin or cross-linked aliphatic hydrocarbon resin, a fluxing oil or other extender for the bituminous material and a fibrous filler. The adhesive layer may be covered with a release layer which is removed prior to application of the water proofing material.
Patent GB-847469-A (GB)
Title: Ice making machine
Inventor: BAYSTON JOHN ROBERT
IPC: F25C1/04
Filed: 1958-05-16
Abstract: 847,469. Ice-making. BAYSTON, J. R. May 16, 1958, No. 42295/59. Divided out of 847,468. Drawings to Specification. Class 29 The matter of this Specification is included in Specification 847,468 but the claims are directed to the feature that the identical superimposed ice-making units have each a vertical shoot extending right through so that ice produced by the upper units can be discharged through the shoots of lower units, all the ice being accumulated in a single bin at the bottom.
Patent GB-999481-A (GB)
Title: Improvements in pumps having reciprocating piston which acts as a rotary distributor
IPC: F02M41/12
Filed: 1961-11-29
Abstract: 999,481. Fuel injection pumps. SOC. ANON. POUR L'EXPLOITATION DE PROCEDES CHIMIQUES ET PHYSIQUES. Nov. 29, 1961 [Dec. 7, 1960], No. 42708/61. Heading F1A. A rotating and reciprocating piston 2 distributes liquid to valved outlets 4 by means of a groove 7 and controls the suction port 3 by means of grooves 8 connected to the piston head by passages 10, 11. The arrangement is such that the relevant outlet 4 communicates with both the pump chamber and the inlet 3 before delivery commences and that the inlet 3 is closed before delivery commences.
Patent GB-918697-A (GB)
Title: Improvements relating to television inspection apparatus
Inventor: TATTERSALL JOHN OWEN
IPC: H04N7/18
Filed: 1959-12-17
Abstract: 918,697. Servicing reactors; viewing equipment for reactors. A.E.I.-JOHN THOMPSON NUCLEAR ENERGY CO. Ltd. Dec. 7, 1960 [Dec. 17, 1959], No. 42964/59. Class 39 (4). [Also in Group XL (b)] Spindles 8, 9 of combined television camera and grab equipment similar to that disclosed in Specification 879,528 and connected, respectively, to bodily rotate the grab and to actuate the grab tongs, are driven from a single motor 27. The spindle 9 is driven directly through a gear-wheel 33 whilst spindle 8 is driven through a clutch 28 operated by a solenoid 29. The clutch comprises an axially fixed member 30 rigid with a gear-wheel 32 and an axially movable member 31 biased to the disengaged position, Fig. 6, by a spring 35. A shaft 37 extending through apertures in the members 30, 31 carries a gear-wheel 38 and has a pin 40 engaging a slot 41 in the member 31. Thus when the solenoid 29 is energized the member 31 is pulled down and cogs on the opposed end faces of the members 30, 31 engage so that a drive is transmitted from wheel 33 through wheels 34, 32, members 30, 31, pin and slot 40, 41, shaft 37 and wheels 38, 39 to the spindle 8. When the spindle 8 is driven to bodily rotate the grab the solenoid is energized to give a compensatory rotation to the spindle 9 so that the tongs are not operated. When the tongs are operated by the spindle 9 the clutch 28 is disengaged and to prevent back drive from the tongs causing unwanted bodily rotation of the grab, should the tongs encounter an obstruction, the member 31 is locked against rotation by the engagement of the slot 41 with a fixed stud 42. Reference has been directed by the Comptroller to Specification 879,528.
Patent GB-1447669-A (GB)
Title: Production of unsaturated acids esters and nitriles
IPC: G01N21/71
Filed: 1973-09-13
Abstract: 1447669 Catalyst composition ROHM & HAAS CO 13 Sept 1973 [6 Oct 1972] 43136/73 Heading B1E [Also in Division C2] A catalyst composition, used in the reaction of formaldhyde with an alkanoic acid or ester or an alkyl nitrile to give unsaturated compounds, comprises pyrogenic silica, optionally admixed with up to 10% wt of pyrogenic zirconia, the silica having a total surface area of from 150-300 m<SP>2</SP>/g, a total pore volume of 3-15 cc/g and a pore size distribution such that at least 50% of the pore content is constituted by pores having a diameter in excess of 10000Š, less that 30% by pores of diameter less than 1000Š and the remaining pore content by pores in the range 1000-10000Š, the silica having been calcined with a base activating agent which increases the basicity of the silica. The base activating agent may be organic, e.g. pyridines, alkylamines, quaternary ammonium salts, alkali metal salts of carboxylic acids or sulphur-containing organic bases such as trimethyl sulphonium hydroxide, or it may be inorganic, e.g. metals of Gps IA, IIA and IIIB and their salts, oxides, superoxides, hydroxides or amides. Other specified activating agents include antimony pentoxide; borax; sodium phosphate, hydrogen phosphate, carbonate, silicate and tungstate; ferrous hydroxide; cesium molybdate; stannic oxide; and magnesium aluminium silicate. The Examples relate to catalysts wherein the base acitvating agent used is potassium hydroxide, cesium hydroxide and/or cesium stearate (buffered by disodium hydrogen phosphate and borax), substituted hydroxylamines or sodium pyrophosphate.
Patent GB-1311928-A (GB)
Title: Shuttles
IPC: D03J5/00
Filed: 1970-09-10
Abstract: 1311928 Shuttles EMIL FORSTER AG 10 Sept 1970 [16 Sept 1969] 43301/70 Heading D1E Apparatus for securing the head of a spring clamp 7 for a pim or cop in a shuttle wherein a bolt passes through a transverse bore 2a in the shuttle and the head of the clamp includes a cylindrical resilient member 3a surrounding the bolt, which member 3a, when the bolt is tightened presses against the wall of the bore and grips the head of the clamp. The resilient member 3a may have a frusto-conical end covered by a frusto-conical annulus 4a which abuts the head of the clamp, and there may be a resilient member on each side of the head of the clamp (Figs. 1-6, not shown). The resilient members may have concave, convex, or chamfered ends cooperating with respective complementary surfaces on the clamp head (Figs. 1-6, not shown).
Patent GB-1020974-A (GB)
Title: Improvements in or relating to the measurement of a gradient and/or a higher derivative of magnetic fields
IPC: G01R33/07
Filed: 1964-10-26
Abstract: 1,020,974. Magnetic tests. SIEMENSSCHUCKERTWERKE A.G. Oct. 26, 1964 [Oct. 26, 1963], No. 43638/64. Heading G1N. [Also in Division H1] An indication of the gradient of a magnetic field is given by a meter 9 connected across a bridge circuit containing two probe arms 1, 2 joined by a bridge 18, the probe arms and the bridge being formed integrally from a single piece of magneto-resistive semi-conductor material, such as indium antimonide. The bridge 18 is metallized, and mutually parallel strips of good conductivity may be mounted on or embedded in the probe arms 1, 2 at right angles to their axes. Two such devices, possibly formed from a single piece of semi-conductor material, Fig. 4 (not shown), may be combined to measure the second derivative with respect to distance of the magnetic field.
Patent GB-1520908-A (GB)
Title: Oven cleaning by pyrolysis
IPC: F24C14/02
Filed: 1975-10-23
Abstract: 1520908 Supply circuits for heat cleanable ovens COMPAGNIE EUROPEENNE POUR L'EQUIPMENT MENAGER 23 Oct 1975 [29 Oct 1974] 43672/75 Heading H2H A cooker having a heat cleanable oven comprises a catalyzer which includes a heating resistor whereby the temperature of the catalyzer is increased, energization of the heating resistor being terminated when the oven temperature reaches a value at which the catalyzer becomes effective but lower than the cleaning temperature. An oven comprises four heating resistors A, B, V, S, suitably situated in the oven which resistors a,re used in the cleaning and cooking operations of the oven, a heating resistor G used for a grilling operation and a heating resistor C associated with a smoke catalyzer (not shown) preferably containing palladium oxide which becomes effective above 350‹ C. A selector switch Co (shown in Fig. 1 in the oven cleaning position) connects resistors A, B across an A.C. source u, v in series with a cooking thermostat Tc and switch contact P2-3 and resistors V, S in parallel across the A.C. source by way of an oven door switch Lp, the 500‹ C. contact of a cleaning thermostat Tn and contacts a, b, c of the switch Co. The resistor C which accelerates the heating of the smoke catalyzer is energized from the A.C. supply by way of the door switch Lp, the 350‹ C. contact of the cleaning thermostat Tn and the contact a of switch Co. Initially the four heaters A, B, V, S are energized during cleaning together with the resistor C. As the oven temperature increases the thermostat Tc opens at a maximum cooking temperature below 350‹ C. thus de-energizing heaters A, B. When the oven temperature reaches 350‹ C. at which the smoke catalyzer becomes effective the 350‹ C. contact of the thermostat Tn opens to de-energize the catalyzer heating resistor C. Thereafter the heaters V, S remain energized to complete the cleaning operation with the oven temperature being cycled about 500‹ C. by the 500‹ contact of the thermostat Tn. When the switch Co is in the cooking position (Fig. 2, not shown) the heaters A, B are permanently energized with the heaters V, S, cyclically energized by way of the cooking thermostat Tc at the desired oven temperature. During cooking the heater resistor C is also permanently energized by way of the 350‹ contact of the thermostat Tn and a contact of the switch Co in the P4-5 position.
Patent GB-984065-A (GB)
Title: Improved castors
IPC: B60B33/02
Filed: 1963-11-06
Abstract: 984,065. Castors. A. VAN DE WALLE. Nov. 6, 1963 [July 18, 1963], No. 43771/63. Heading A4U. A castor lockable against swivelling and rotation has a stirrup 1 pivoted to the wheelfork 20 and carrying a spring pawl 8 which engages a recess in a ring connected to the pivot 15 when the stirrup 1 is moved by means of a lever 3 to lock against swivelling. A rod 6 slideable within the swivel bearing engages a stirrup 12 and when thrust downwardly locks the wheel in a required direction by the engagement of a projection 2 with a toothed wheel 10 connected to pivot 15, the crosspiece 9 of stirrup 12 carrying as well as projection 2 a spring brake 17 which is made to contact the tyre of the wheel and stop rotation.
Patent GB-935759-A (GB)
Title: Automatic gain control systems
Inventor: LAW PETER GEOFFREY
IPC: H03G3/30
Filed: 1960-12-20
Abstract: 935,759. Automatic gain control. WESTING- HOUSE BRAKE & SIGNAL CO. Ltd. Oct. 20, 1961 [Dec. 20, 1960], No. 43782/60. Class 40 (4). In an automatic gain control system for an amplifier, the pilot frequency or other constant signal is filtered from the amplifier output and applied to a control circuit, Fig. 2, to differentially adjust the heater currents of thermistors TH1 and TH2 which are connected in a bridged T attenuator circuit, Fig. 3, in the input of the amplifier, the variation of resistance of the thermistors being such as to tend to keep the amplifier output constant. The current through one of the thermistor heaters may be indicated or operate alarm circuits for supervision purposes.
Patent GB-1291629-A (GB)
Title: Improvements relating to a flow control valve
IPC: E21D15/44
Filed: 1970-09-14
Abstract: 1291629 Valves ROBERT BOSCH GmbH 14 Sept 1970 [13 Sept 1969] 43805/70 Heading F2y A combined relief and bleed valve for an hydraulic pit prop has a bleed valve member 1 movable against spring 7 by rod 17 to disengage seat 3 and connect the prop to exhaust via annulus 6 and gaps 5 defined by flats on the valve member. An elastic sleeve 9 within valve member 1 is biased by a gas loading pressure to close inlet and outlet ports 12, 14. A porous sintered metal ring 15 surrounds the outlet ports. In use, sleeve 9 is distorted by excess pressure in the prop to connect ports 12 and 14. The conical surfaces 3, 4 may alternatively be planar; in either case, one or both of the surfaces can be plastics-coated.
Patent GB-1354797-A (GB)
Title: Drying
IPC: D21F5/02
Filed: 1971-09-21
Abstract: 1354797 Drying sheets or webs D J M CHAMOUTON 21 Sept 1971 [22 Sept 1970] 43852/71 Heading F4G In a method of drying materials such as sheets or webs 1 of paper, the material is passed through an enclosure 8 which is substantially sealed from the external atmosphere and is contacted with a drying member, e.g. rotary cylinders 2 to liberate steam from the material. The drying member is heated from the inside with compressed steam which condenses inside the member during the liberation of steam from the material. The condensate is conducted by pipe-line 4 through a pressure reducing device 7 and reconverted into steam in a heat exchanger 6, for example, using steam liberated from the material and passing along pipe-line 10. Pipeline 4, device 7, exchanger 6 steam pipe-line 3 and compressor 5 all form a closed circuit. Steam generated by the material is maintained at a pressure slightly above atmospheric, in the apparatus shown, to prevent ingress of air at slits 9. In the particular apparatus shown, steam introduction lines 13, 18 and 15, 16 are used for initiating the steam cycle and scavenging air from the enclosure 8 respectively. Lines 23, 24 remove excess water from pipe-line 4, pump 19 removes non-condensable products from cylinders 2, and circuit 14 supplies water by means of pump 17 to saturate the steam compressed by compressor 5. The temperature in the enclosure and the moisture content of the paper web is controlled by an electrical circuit in which temperature sensor 25 connected to bridge 26 balanced so that a variation is signalled to amplifier 27, which via relays 28 and servo-motor 29 controls the speed of the motor 32 of compressor 5. Moisture sensor 33 similarly is linked to servomotor 37 which controls a valve in pressure reducing device 7. The operating frequencies of the two control circuits are substantially different to prevent cross-coupling.
Patent GB-1361553-A (GB)
Title: Anti-friction bearing component manufacture
IPC: C21D9/40
Filed: 1972-09-22
Abstract: 1361553 Heat treating steel FORD MOTOR CO Ltd 22 Sept 1972 43936/72 Addition to 1292800 Heading C7A [Also in Division F2] Components of rolling bearings (e.g. balls and races) are prepared by heating a blank of SAE steel 52100 to a temperature (e.g. 2000‹F) resulting in a completely austenitic structure, cooling the austenitized blank sufficiently rapidly to avoid the formation of any massive carbides and to yield a finely divided pearlitic structure, hardening the blank by heating to such a temperature and for such a time that it is insufficient to produce carbide growth but sufficient to establish a thermodynamic equilibrium between the austenite and undissolved carbide, quenching the heated blank in oil or a coolant producing a similar cooling rate and tempering the quenched blank to a Rockwell C hardness of 60 to 64. During the hardening step the blank is preferably heated to 1550‹F for about one hour. The blank is tempered at 250‹ to 400‹F.
Patent GB-1439390-A (GB)
Title: Treatment of chloroprene rubber
IPC: C08L21/00
Filed: 1973-09-20
Abstract: 1439390 Treating polychloroprene BP CHEMICALS INTERNATIONAL Ltd 20 Sept 1973 [7 Oct 1972] 44092/73 Heading C3P  The surface of polychloroprene particles is treated with an aliphatic polyhydroxy compound in aqueous solution to prevent agglomeration. Compounds used in examples are glycerol, ethylene glycol, di- or triethylene glycol, polyethylene glycol (n=200-4000), polypropylene glycol (n=1000-4000) and polyvinyl alcohol (n= 500-4000).
Patent GB-1437609-A (GB)
Title: Variable speed drive unit
IPC: F16D25/10
Filed: 1973-09-24
Abstract: 1437609 Clutch/brake combinations; friction clutches; viscous couplings; full-face disc brakes G M SOMMER CO Inc 24 Sept 1973 [22 Sept 1972] 44735/73 Headings F2L F2C F2E and F2W A variable speed drive comprises the combination of a multi-disc slipping clutch having clutch discs 218, 222 and a multi-disc brake having brake discs 220, 224, an hydraulically operated piston 228 moving under fluid pressure against springs 236 to press the clutch discs 218, 222 together via a bearing 264 interconnecting piston 228 and the presser plate 256 of the brake, which presser plate is connected to the presser plate 258 of the clutch through bolts 252 and spacer pins (not shown). The springs 236 engage the brake on release of fluid pressure. The clutch and brake are within a housing 42 through which fluid flows from a pump 32 so that the clutch operates through viscous shear. The discs 222 of the clutch are connected to a driving shaft 14 (which also drives the pump 32 through a toothed belt 110) and the discs 218 to a driven shaft 18, which also supports the discs 220 of the brake, whose discs 224 are attached to a part of the fixed housing 42. Cooling of the device is by a fan 84, fins 44 and a coolant passage 247. An electronic controller (Fig. 1, not shown) controls a servo-valve 30 which apportions the fluid from pump 32 between the inside of housing 42 (chamber 43) and the piston 228, to which latter the fluid flows through passages 248 and 246 and this controller also receives an input from a magnetic pick-up 156 which co-operates with a pulse gear 22 on shaft 18 to provide a feedback indicative of the rate of rotation of shaft 18. The controller can provide controlled acceleration or deceleration of shaft 18 or may vary the speed of the shaft in accordance with a programme. In a described application (Figs. 4, 5, 6 and 7, not shown) the shaft 18 drives a pump supplying fluid to an hydraulic ram. Other applications are the driving of fans, extruders, mixers, machine tools, stamping presses and balancing machines.