baber/WOPTO huggingface dataset:
Patent GB-924459-A (GB)
Title: Modified unsaturated polyester resins
Inventor: HUNT THOMAS
IPC: C08G63/676
Filed: 1961-02-04
Abstract: The pot-life of an unsaturated polyester is increased by reacting it, under non-polymerizing conditions, with an a ,b -unsaturated aldehyde of formula <FORM:0924459/IV(a)/1> where R1 is hydrogen or an aliphatic or aromatic group and R2 is hydrogen or a lower alkyl group.  Reaction is performed in the presence of an acid catalyst having a dissociation constant greater than 1x10-2 (e.g. p-toluene sulphonic acid or a boron trifluoride acetic acid complex) and, preferably, also an inhibitor (e.g. hydroquinone).  The preferred polyesters are those obtained by reacting (a) an unsaturated a ,b -dicarboxylic acid, e.g. maleic, fumaric, itaconic or citraconic acid, (b) a saturated glycol, e.g. ethylene-, diethylene-, triethylene-, trimethylene, a -propylene or 1:3-butylene-glycol, and, possibly, also (c) a non-polymerizable dicarboxylic acid, e.g. succinic, adipic, sebacic, azelaic, phthalic, tetrahydrophthalic, carbic or chorendic acid.  The modified polyesters are copolymerized with an unsaturated monomer (e.g. styrene, methyl methacrylate, ethyl acrylate, acrylonitrile, vinyl acetate, ethylene glycol dimethacrylate, diallyl phthalate, diallyl maleate or triallyl cyanurate) in the presence of a peroxide or hydroperoxide catalyst and possibly an accelerator (e.g. cobalt naphthenate, vanadium naphthenate or vanadium butyl phosphate).  In examples polyesters obtained by reacting maleic anhydride, phthalic anhydride and either ethylene glycol or propylene glycol were reacted with acrolein and subsequently copolymerized with ethyl acrylate or styrene.  The polyester may be inhibited with hydroquinone.
Patent GB-149887-A (GB)
Title: An improved propeller for air and water craft
IPC: B64C11/16
Filed: 1920-02-12
Abstract: 149,887. Urithzen, O. Feb. 12, 1920. Screw propellers. -To design the blade of a screw propeller, two concentric semicircles b, d are drawn with radii equal to the hub and propeller radii respectively, and the elevations of the half cylinders thus shown in plan are also drawn, the height being equal to the pitch of the blades. The semicircles b, d are divided into sectors corresponding to the number of blades, which, in the case shown, is six. Helices a, c with the same pitch are drawn in elevation and the points i, k are projected on to the helix a. The portion of the helix thus cut off then represents the shape of the root of the blade. The length of the arc g, h is marked off along the helix c from e to f, the points e, f are joined by a straight line and a similar curve e, o, f drawn symmetrically on the opposite side, the point o bisecting the curve. In Fig. 2, the dotted rectangle is a plan of the hub, and the line A is the plan of the root of the blade. The line F, M, E is similar to the line f, o, e, Fig. 1, and represents a plan of the tip of the blade. The sides are shown by the lines E, E', F, F<1>. Other contour lines intermediate between the hub and tip may be similarly drawn.
Patent GB-430589-A (GB)
Title: Improvements in or relating to indicating devices comprising pointers adjustable with reference to index sheets
IPC: H04M1/274
Filed: 1934-02-09
Abstract: 430,589. Impulse transmitters. HALL, F. W., 21, Bolton Gardens, Earl's Court, and HALL TELEPHONE ACCESSORIES (1928), Ltd., 70, Dudden Hill Lane, Willesden, both in London. Feb. 9, 1934, No. 4362. [Class 40 (iv)] [See also Group XXXVIII] In apparatus, such as impulse transmitters which can transmit a predetermined multidigit number at a single setting, comprising an adjustable pointer d<1>, d<2> co-operating with two staggered index-sheets a, a<1> of identical pattern, the sheets and their holders c, c<1> have inter-engaging notches and projections a<2>, e which prevent interchange of the sheets without reversal thus rendering any accidental interchange apparent.
Patent GB-797384-A (GB)
Title: Improvements in or relating to the extraction and purification of sapogenins
Inventor: WILKINS FREDERICK JAMES
IPC: C07J75/00
Filed: 1956-02-13
Abstract: In a process for the treatment of an aqueous slurry of crude material resulting from autolysis of a natural saponin-containing material to facilitate the removal of water therefrom, the slurry is heated at a pH in the range 1-8 to convert it to a state in which it can be filtered or centrifuged.  In an example an autolysed aqueous slurry at its natural pH (approx. 4) is autoclaved at 181 DEG  C. for 4 hours.  The residue after filtration is treated with 3N hydrochloric acid for 6 hours followed by treatment, after further filtration, with sodium hydroxide and methanol.  Calcium chloride is finally added and the filtrate evaporated to yield crude hecogonin.  Other examples describe modifications of the process wherein the slurry at its natural pH is autoclaved at 195-198 DEG  C. for 14 mins.; 195 DEG C. and 138 DEG  C. for 16 hrs.; and 157 DEG  and 138 DEG  C. for 4 hrs.; and wherein the slurry adjusted to N/10 acidity by sulphuric acid is autoclaved at 125 DEG  C. for 4 hrs.  Yields of hecogonin vary according to the process undergone.
Patent GB-348531-A (GB)
Title: Improvements in or relating to the casting of ingots
IPC: B22D7/00
Filed: 1930-02-10
Abstract: An aluminium alloy ingot to be subsequently worked contains 4-5 per cent of copper and 0,75 per cent each of manganese and silicon. Reference has been directed by the Comptroller to Specifications 19950/96, [Class 83, Metals, Cutting &c.], and 298,324, [Class 83 (i), Casting &c. metals].
Patent GB-692959-A (GB)
Title: Improvements in and relating to fixtures for electric lamps
IPC: F21V17/00
Filed: 1951-02-23
Abstract: 692,959. Electric lamp fittings. SYLVANIA ELECTRIC PRODUCTS, Inc. Feb. 23, 1951 [Feb. 28, 1950], No. 4515/51_ Classes 75(ii) and 75(iv) An electric lamp fixture comprises a chassis 1 having end plates 2 on the inner face of each of which are disposed projecting tabs 15, engaged by a flanged portion or flanged portions 20 of one or more lightcontrolling panel or panels 5. Latches 17 pivotally mounted on the end plates 2 hold the panels 5 in position. Fluorescent lamps 12 are supported by lampholders 6, fastened either to the end plates 2, or, as shown, to the inside faces of and projecting through apertures in the chassis 1. A V-section reflector 3 is supported by spring latches 13 and the plates 2 beneath the chassis 1, and is slotted to receive louvre fins 4 having hooked ends 16 for seating the lower edges of the panels 5. Each fin 4 is locked to the reflector 3 by a tab 14 formed integrally with the fin and deformed after the latter has been positioned in the reflector slot. The reflector 3 may be supported, when access is required to the chassis 1 for maintenance purposes by a pair of chains 18 after it has been disengaged from the latches 13. Specifications 692,960 and 692,961 are referred to.
Patent GB-539490-A (GB)
Title: Improvements in or relating to electron discharge arrangements employing electron beams
IPC: H01J31/04
Filed: 1940-03-11
Abstract: 539,490. Cathode-ray tubes thermionic valve circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 11, 1940, No. 4546. Convention date, March 10, 1939. [Classes 39 (i) and 40 (v)] In an electron discharge tube having two or more adjacent beams 1, 2 the current flow in one, say No. 1, is controlled by the second beam which is modulated. The beams are focused by an electromagnet 20 and enclosed in a shield 16 maintained at a potential positive to the cathodes 10, 11. The shield may be of rectangular cross-section and the end plates may be separate from the main part of the shield and at a different potential. The output anode 14 is connected to a load circuit; the anode 15 for the controlling beam may be at a negative potential so that electrons in the beam return to the cathode 11. The device may be used as a relay ; as a generator of square topped wave-form pulses sinusoidal currents are supplied by a transformer 21. Modulating currents are injected by a transformer 22 to vary the time intervals of the pulses.
Patent GB-1493593-A (GB)
Title: Radiography
IPC: G01T1/185
Filed: 1974-01-31
Abstract: 1493593 Radiography EMI Ltd 15 Jan 1975 [31 Jan 1974] 04561/74 Heading H4F Apparatus for examining a slice of a body by X- or y-radiation which is of the type described in Specification 1, 283, 915 in which a radiation source 5 and at least one detector (preferably a plurality of detectors 18 extending over the whole spread of a fan of radiation from source 5) in addition to being orbited around the body being analysed (which is on table 2 within ring 8) is provided with means for shifting the angular position of the detectors 18 after each orbital rotation so that with a three revolution examination cycle the detectors 18 1 -18 n  detect radiation received along beam paths 29 2 -29 n+1  during the first and third revolutions and along paths 29 1 -29 n  during the second revolution. The detectors comprise a unitary structure supported on guides 39, and this structure is shifted between two limit positions corresponding to the angular separation between two adjacent detectors by energizing coils 35 and 36. Sensitivity errors of the detectors have two components, the first being dependent on the position of the detector (that is a difference in the sensitivity of the detector from a neighbouring detector) and the second being dependent upon time (that is drift on the sensitivity of any one detector during the time occupied by an examination cycle). The first error component is compensated for by comparing the outputs of the detectors in pairs at predetermined times when the respective detectors of a pair receive radiation along identical paths, e.g. during the first and second revolutions when a radiation path is incident on the k<SP>th</SP> and then the k + 1<SP>th</SP> detector respectively due to the above angular shift. The second error component is compensated for by comparing the outputs from each detector when receiving radiation along identical paths at different times, e.g. during the first and third revolutions. The first error component may only be compensated where multiple detectors are used whereas the second error component may be compensated in systems emplying a single detector or multiple detectors.
Patent GB-1020265-A (GB)
Title: Bed, especially a folding camp bed with swingable back regulated by the supports
IPC: A47C1/032
Filed: 1964-01-24
Abstract: 1,020,265. Folding chair beds. O. GREINER. Jan. 24, 1964 [Jan. 24, 1963; April 1, 1963], No. 4580/64. Heading A4J. A folding chair bed has a seat 1 and back 2 hinged at 8. A support 11 is pivoted to seat 1. A further support consisting of two levers 3, 4 pivotally connected at 16 is pivoted at 6, 7 to seat 1 and back 2 respectively. Lever 3 may be of angle shape as shown or of curved shape, Fig. 4 (not shown). When a person sitting on seat 1 leans against back 2 lever 4 and a short part 3a of lever 3 form an obtuse angle approaching a straight line. Levers 3, 4 are designed so that they will transmit the weight of the user from the seat to the back in such a way that throughout the whole range of movement from 90 degrees to 180 degrees there is exact balance between the transmitted pressure and that of the user against the back 2.
Patent GB-116906-A (GB)
Title: Improved Means for Securing Shades to the Holders of Electric Lamps.
Inventor: WHEELER HENRY FRANCIS
IPC: F21V17/06
Filed: 1917-03-30
Abstract: 116,906. Wheeler, H. F. March 30, 1917. Shade-holders.-In a device for securing a shade to an electric lamp holder in which internal pins on a ring C engage bayonet slots in the holder, a spring 11 is inserted between the ring C and a second ring J, which bears against the shade. The bayonet slots are connected to the longitudinal part of the ordinary bayonet slots in the holder, and the ring J may be secured to the end of the spring H by clips K.
Patent GB-693062-A (GB)
Title: Improvements in or relating to electric capacitors
Inventor: GIRLING DOUGLAS STACEY
IPC: H01G4/22
Filed: 1951-02-26
Abstract: 693,062. Electric condensers. STANDARD TELEPHONES & CABLES, Ltd. Feb. 22, 1952 [Feb. 26, 1951], No. 4642/51. Class 37. [Also in Group VIII] A paper or mica condenser, sealed in a container by a thermosetting mixture of a base resin and a hardener, is impregnated with the base resin and hardener which is cured when the sealing mixture is cured. Suitable base resins are the aryl substituted ethylene oxides, e.g. the condensation product of epichlorohydrin and 2, 2<SP>1</SP>(p-p<SP>1</SP>-diphenylol) propane. A suitable hardener is phthallic anhydride.
Patent GB-556017-A (GB)
Title: Improvements in and relating to boiler and like furnaces
IPC: F23M7/00
Filed: 1942-04-09
Abstract: 556,017. Furnace fronts. McKEAN, J. G. April 9, 1942, No. 4655. [Class 51 (i) The furnace opening in the inner wall 1 of a double walled furnace front has a flat lower surface 3 and an arched upper surface 31 and is surrounded by a machined surface 11 against which a circular plate 18 carrying an openended cylindrical air director 19 is secured by studs 16 when the furnace is fired by an oil burner 7 carried by a door 6 in the outer wall 2. The lower part of the surface 11 is bordered by a flange 12. When the furnace is to be fired by coal the plate 18 and burner fittings are removed and a saddle piece 13 formed with depending flanges 14, 15 and having its upper surface flush with furnace dead-plate 8 is secured at the studs 16. A baffle 20 is also secured to the door 6. A damper-controlled opening 4 leading into the ash space may be closed by a plate secured to the inner wall 1 and the grate may be covered with broken firebricks while the furnace is fired by the oil burner.
Patent GB-1383392-A (GB)
Title: Selective hydrotreating of different hydrocarbonaceous feedstocks in temperature regulated hydrotreating zones
IPC: C10G65/00
Filed: 1972-02-01
Abstract: 1383392 Hydrotreating hydrocarbon oils EXXON RESEARCH & ENG CO 1 Feb 1972 [5 Feb 1971] 4713/72 Heading C5E A first hydrocarbon feedstock is hydrotreated with excess hydrogen in a first hydrotreating zone and the effluent from this zone is cooled by mixing with a second hydrocarbon feedstock and the mixture is hydrotreated in a second hydrotreating zone; the hydrogen uptake of the first feedstock is greater and that of the second feedstock is lesser than if the two feedstocks had been treated together in the two zones. The feedstocks treated can be crude oils, residual oils, shale oils, tar sand oils and liquid coal products; the first and second feedstocks can be similar feeds having different boiling ranges. A third feedstock can be added to the effluent from the second zone and after hydrotreating this mixture a fourth feedstock can be added to this effluent and the mixture hydrotreated in a fourth zone. Fig. 1 shows an embodiment in which the interstage cooling is assisted by quenching with water and Fig. 2 (not shown) illustrates an embodiment in which the interstage cooling is assisted by indirect heat exchange. The hydrotreating is carried out at 650-850‹ F. and 680-2000 p.s.i.g. using a catalyst comprising Cr, Mo and/or W together with Fo, Co and/or Ni on a carrier such as alumina, alumina-silica, zirconia and titania and which can contain bauxite, bentonite or montmorillonite.
Patent GB-468716-A (GB)
Title: Improvements in or relating to dust filters
IPC: B01D46/18
Filed: 1936-02-17
Abstract: 468,716. Air &c. filters. SPEIGHT, J. Feb. 17, 1936, No. 4768. [Class 8 (ii)] A travelling filter band 31 in an outer casing 11 passes over the sides of an air chamber 21 closed by plates except at the sides facing the filter where it has openings filled by frames 34 filled with expanded metal and a covering of hessian acting as a support for the filter band. Air &c. passes from conduits into chests 17 formed by partitions 15, 16, through the filter into the air chamber 21, and escapes by an outlet conduit; an inspection window 24 is provided. The band may be carried by a meshed steel band, or it may be laterally attached to driving belts which are secured to chains running over sprockets. Felt sealing strips 38, rotary felt sealing rollers 53, 54, and cleaning brushes 57, 58, and dust conveyers 56 located outside the air &c. flow are provided. In a modification, several parallel filter bands are provided in a casing, with air inlet chests located between and serving adjacent bands.
Patent GB-525072-A (GB)
Title: Improvements in or relating to cardboard boxes or containers
IPC: B65D5/42
Filed: 1939-02-14
Abstract: 525,072. Boxes for live birds. NOBLE, I. Feb. 14, 1939, No. 4771. [Class 18] Cardboard boxes or containers for live birds have ventilation holes 6 with guard members 7 protecting them from blocking from the inside. Members 7 are integral with the Blank. A separate lid 14 with hinge strip 12 may have ventilation holes 15 and the guards may be on the other walls.
Patent GB-952946-A (GB)
Title: Method and apparatus for emulsifying and texturating fats
IPC: A23D9/02
Filed: 1962-02-08
Abstract: The casing of a chilling unit for fat emulsions is formed of an aluminium alloy, which has high abrasive resistance and good mechanical strength, of the following nominal composition: Al 97.9%; Cu 0.25%; Si 0.6%; Mg 1.0%; Cr 0.25%.  The blades of the unit may be made of a similar alloy, nylon, or steel.
Patent GB-325689-A (GB)
Title: Electric cable terminals for telephone and like cables
IPC: H04Q1/14
Filed: 1929-02-14
Abstract: 325,689. Standard Telephones & Cables, Ltd., and Baguley, E. Feb. 14, 1929. Junction boxes; binding- posts.-A telephone cable or like multiple conductor is passed through a thimble 6 in a base 1 to a number of terminals 14 moulded into a head 2 mounted on the base, notched fanning strips 8 being moulded at both sides of the head to guide the conductors to the terminals. The drop wires from the terminals pass out through openings in the base at each side of the thimble 6. A cover 27 encloses the connections and is anchored by a chain 28 and the space 7 is filled with insulating compound. Designation strips 13 of ivorine &c. are provided. The terminals 14 are secured in bushes 12 on the head 2 and are hollow for the passage of the conductor 16. The upper end is recessed to form a soldering cup 18 and notched at 19 to retain the end of the conductor during soldering. The bent end prevents removal of the nut 20. A second nut or screw washer 22 forms an abutment for clamping the drop wire.
Patent GB-754231-A (GB)
Title: Improvements in or relating to devices for driving perforated picture film by means of a constant-speed sprocket
IPC: G03B1/42
Filed: 1954-02-19
Abstract: 754,231. Kinematograph apparatus. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 19, 1954 [Feb. 21, 1953], No. 4959/54. Class 97 (1). A perforated film is driven by a sprocket having a tooth pitch slightly greater than that of the film perforations so that, at any time, only one sprocket tooth, or pair of teeth, engages the perforation edge(s). This contact is maintained while one particular film frame is in effective use, after which the film is rapidly separated from the said tooth, or pair of teeth, so that the succeeding tooth or pair comes into contact with the edge(s) of the, next perforation(s). The film 19 is shown approaching the position where it is detached from the sprocket tooth 20 by the end 18 of a vibrating spring- blade, 16 actuated by a cam 22 which lifts, it until a slot 21 slips over the step in the cam. The movement of the blade may be damped by contact with felt strips adjacent its edges. The cam may be carried on the sprocket shaft, having one lobe for each sprocket tooth.
Patent GB-1148011-A (GB)
Title: A method for producing a material containing a solid lubricant by powder metallurgy
IPC: C22C32/00
Filed: 1967-02-01
Abstract: 1,148,011. Alloys; powder metallurgy. DEVENTER-WERKE G.m.b.H. Feb. 1, 1967 [July 1, 1966], No.4973/67. Headings C7A and C7D. A self-lubricating material produced by powder metallurgy comprises Cu and/or Ni as the primary metal; a solid lubricant such as graphite; and phosphorus, introduced into the powder mixture as an alloy or compound and persisting as such in the end product, in a quantity of at least 0À5% by weight. The solid lubricant may be present in a proportion of 4-25% by weight, and the phosphorus may be introduced in the form of a phosphorcopper alloy or compound to give a phosphorus content of 0À5-2% in the end product. The material may additionally contain lead (e.g. 20% by weight), tin, zinc, nickel, cobalt, manganese and/or silver. The examples disclose the following manufacturing sequences: - (1) cold press, heat treat above 750‹C. (preferably 780‹C. ) in normal furnace atmosphere, hot press; (2) cold press, heat treat at 750‹C.. in an oxygen-free atmosphere, cold press; (3) cold press, heat treat at up to 850‹C. in hydrogen, cold press, anneal in hydrogen at up to 750‹C.
Patent GB-509005-A (GB)
Title: Improvements in or relating to filter-tip cigarettes
IPC: A24D1/02
Filed: 1939-02-20
Abstract: 509,005. Cigarettes. ESCOTT, J. Feb. 20, 1939, No. 5046. [Class 130] A cigarette paper for filter-tip cigarettes is provided with a film a of rubber solution along one edge, a parallel film c on the reverse side, and a patch d of rubber solution at or near one corner. The films a, c are united by pressure when making a cigarette and the patch d is united to a band or ring r of rubber solution on a filter tip s, Fig. 2. Specifications 509,003 and 509,006 are referred to.