baber/WOPTO huggingface dataset:
Patent GB-1185375-A (GB)
Title: The Treatment of Flexible Fibrous Porous Sheets
IPC: C14C11/00
Filed: 1967-04-14
Abstract: 1,185,375. Coated sheet material. MINNESOTA MINING & MFG. CO. 14 April, 1967 [15 April, 1966; 12 Dec., 1966], No. 17298/67. Heading B2E. [Also in Divisions C6 and D1] A flexible, fibrous porous sheet is impregnated or coated with (a) a polyether polyprimary amine having a M.W. of at least 1000 and having a primary amino terminal group attached directly to each end of a polyether moiety containing recurring groups of which at least a major portion consists of oxytetramethylene recurring units and at most a minor portion consists of oxyalkylene (other than oxytetramethylene) or thioalkylene recurring units having from 2 to 6 straight chain carbon atoms, at least one half of said primary amino terminal groups having the structure -OC 4 H 8 NH 2 , said polyether moiety having less than 3% by weight secondary amino nitrogen atoms and less than 0.3% by weight tertiary amino nitrogen atoms and (b) at least one epoxy resin having an oxirane equivalence greater than 1, the oxirane active hydrogen equivalence ratio being between 1/1 and 20/1. The term "oxirane/active hydrogen equivalence ratio" means the number of oxirane equivalents in the total epoxy resin to the number of amino-attached active hydrogen equivalents in the total weight of the polyether amine. The components (a) and (b) with or without an epoxy curing agent and solvent may be applied to the sheet and cured or the components (a) and (b) may be partially reacted, mixed with an epoxy catalyst and solvent and applied to the sheet and completely cured. The polyamine may be poly (tetramethylene oxide) diprimary amine prepared from tetrahydrofuran. The polyamine may be prepared from tetrahydrofuran and other cyclic ethers or thioethers (e.g. oxacycloheptane, 3,3-bis (chloromethyl) oxacyclobutane; phenyl glycidyl ether, propylene oxide, ethylene sulphide, epichlorohydrin and 2-methyl tetrahydrofuran). The epoxy resin may be a polyepoxide with or without a monoepoxide. The epoxy resin may comprise diglycidyl ether of bisphenol A or 1,4 butane diol, butyl glycidyl ether phenyl glycidyl ether, allyl glycidyl ether and glycidyl ether of m-pentadecenylphenol. The sheet may be leather, polyurethane sheet/polyester fibre web laminate, a sheet comprising polyurethane and nylon and leather fibres, cotton twill cloth or a sheet comprising nylon and polypropylene fibres and polyurethane. The compositions may comprise acrylic polymers, polyurethanes, leather fibres, lanolin, petroleum jelly, wood flour, corn cob dust, carbon black, cork and iron oxide. The sheet may be treated with polyurethane, acrylic resin, nitrocellulose or flock prior to or after treatment with the components (a) and (b).
Patent GB-1190775-A (GB)
Title: Improvements in or relating to Fluid Operated Jacks
IPC: E04G21/12
Filed: 1967-04-14
Abstract: 1,190,775. Hydraulic jacks. CHRISTIANI & NIELSEN Ltd., and G. PERSICKE. 10 April, 1968 [14 April, 1967], No. 17319/67. Heading B8J. [Also in Division F2] An hydraulic jack unit for applying tension to reinforcement rods or cables for concrete elements comprises a cylinder 1 with a piston 2 having a piston-rod 3 extending through a seal 6 at the tail end 5 of the cylinder. The piston 2 is sealed to the cylinder wall by seals 9. A hollow tubular element 19 extends through the cylinder 1, the piston 2 and piston-rod 3 being a sliding fit thereon. A cap 12 carried by the element 19 closes the head end of cylinder, being secured thereto by an annular inset weld 13. The weld material is of a different colour from that of the cylinder 1 so that when it is machined out, e.g. for replacing the seals 9, it is easy to detect that it has all been removed. Fig. 2 (not shown) illustrates a stool member for use with the jack.
Patent GB-621463-A (GB)
Title: Trigger mechanism for air guns
IPC: F41B11/647
Filed: 1947-02-13
Abstract: 621,463. Air guns. LAWRENCE, A., and LASZLO, S. E. Feb. 13, 1947, No. 17381/48. Convention date, Feb. 28, 1946. Divided out of 621,417. [Class 119] The trigger 55 on an air gun acts upon a loaded sear 65 to release it from retaining means, the sear thereupon acting independently of the trigger to effect the release of a sear '61 from its holding engagement with the spring- loaded piston 26. The sear 65 of the construction shown has a slot 69 for the reception of its pivot pin 67 and is urged anticlockwise by a spring 73 to a position in which its nose 75 bears on a plate 66. On pulling the trigger the sear 65 is moved rearwardly on the pin 67 and thus releases the nose 75 from the plate 66. The sear now pivots on its pin and in doing so engages with an arm 71 of the sear 61 to release the latter from the piston. The sear 65 when released from the plate 66 is urged into contact with a pin 77 which, by contacting a cam surface 79 of the sear, urges the sear to a position where it will once again be engaged by the plate 66, to compress the spring 73, when the barrel is swung about its pivot 14 and returned to the position shown for re-cocking purposes. Specification 621,417 is referred to.
Patent GB-387577-A (GB)
Title: Improvements in weighing apparatus
IPC: G01G21/00
Filed: 1932-06-20
Abstract: 387,577. Weighing-apparatus. WISTOFT, S., 4, Set. Nikolajvej, Copenhagen. June 20, 1932, No. 17440. [Class 143.] In a weighing-scale of the type wherein the scale beam 1 is situated in the lower part of the casing 3 and the check links 12 are arranged between the pan 7 and the beam, the pivotal points'of the check links are displaced from the vertical position over the pivots 2, 5 of the beam, and the pan carries an out-of-centre projection 15 to form one of the check link pivots, the rod 8 supporting the pan passing between the check links without a direct connection thereto. The check links act respectively as thrust and compression members in co-operation with oppositely-directed knife-edges. An upwardlydirected part 16 of the casing surrounds the check links. The scale pan has a depending flange 17 enclosing the top of the part 16.
Patent GB-731373-A (GB)
Title: Improvements in feeding devices for screens
IPC: B07B1/46
Filed: 1952-07-11
Abstract: 731,373. Feed-box for jigging conveyers. NORDBERG MANUFACTURING CO. July 11, 1952 [July 11, 1951], No. 17546/52. Class 78(1). Feed-box 6 for feeding material to screen 4, which is vibrated by counter-balanced eccentric drive 11 and supported by springs 7, includes teeth 27 which are positioned at different angles so as to-spread the material over the screen. As shown, the teeth are adjustably bolted to the bottom of the feed-box, the material falling therefrom into a shoot leading to the screen.
Patent GB-699982-A (GB)
Title: A new or improved vehicle head lamp
Inventor: LUND WILFRID HERBERT
IPC: H01K9/08
Filed: 1951-07-25
Abstract: 699,982. Vehicle lamps electric incandescent lamps. SAFE-BEAM LAMP, Ltd. July 25, 1952 [July 25, 1951], No. 17588/51. Addition to 660,435. Classes 39(ii) and 75(ii) A vehicle headlamp incorporates a front lens as claimed in the parent Specification in combination with a parabolic reflector and a lamp bulb having a main filament passing through or slightly below the focal point of the reflector and an auxiliary filament of which at least the greater part lies above the focal point and the whole of which lies substantially in a transverse vertical plane containing the focus. Fig. 1 shows a lamp bulb for use in the headlamp and provided with a main horizontal coiled filament a spaced from a parallel auxiliary horizontal coiled filament b. The bulb has a bayonet cap c and two end contacts d, both filaments being connected to the cap c and to the contacts d so that the current can be supplied to either or both filaments through switching means. The auxiliary filaments b may, alternatively, be of U or V outline with its lowest part at or just above the focus of the reflector when the bulb is mounted in the latter. When the main filament only is energized a substantially horizontal long-range beam is emitted for normal driving, and when the auxiliary filament only is energized a downwardly inclined non-dazzling beam is produced. Both filaments may be energized when an intense long range beam is desired.
Patent GB-712178-A (GB)
Title: Improvements in and relating to the production of nitrogenous fertilizers
Inventor: ETTLE GILBERT WILLIAM
IPC: C05C9/02
Filed: 1950-07-14
Abstract: A urea-aldehyde condensate, for use as a fertilizer, is made by reacting urea and formaldehyde in aqueous solution of not more than 90 per cent. total concentration by weight and in the molar ratio of urea to formaldehyde of 1:1 to 2:1, in the absence of added condensation or buffer agents, at a temperature of 70 DEG  to 110 DEG C. for a period of up to 40 minutes, whereby a thickened mixture is obtained which is solidified by further application of heat or by cooling and is then broken up to give particles of desired size which are dried at 130 DEG C. or below.  The formaldehyde, e.g. as an aqueous solution or as paraformaldehyde, may be added to an aqueous solution of urea which may have an initial temperature of 110 DEG C., or solid urea may be added to an aqueous solution of formaldehyde. The formaldehyde solution may be pre-heated to 70 DEG C. before addition to the urea solution or before solid urea is added thereto. The thickened mixture may either be cooled and solidified in the reaction vessel or solidified by discharge therefrom on to a chilled or heated metal roll or plate; in the latter method hardening is accelerated by adding a little mineral acid, e.g. nitric acid, to the mixture before discharge from the reaction vessel.  The dried product may be crushed to a powder, and the dried or crushed product may be granulated with the addition of moisture e.g. in amount of 20 per cent. by weight, and if desired with (a) an inert diluent such as anhydrite, gypsum or starch, e.g. in amounts equal to the weight of the powdered product, or (b) other fertilizers, such as ground ammonium sulphate, e.g. in amounts of 10 per cent. by weight of the powdered product.  Examples are given.ALSO:A nitrogenous fertilizer comprises a dried or crushed urea-aldehyde condensate (see Group IV(a)) which may be granulated by the addition of moisture, e.g. in amount of 20 per cent by weight, and, if desired, with (a) an inert diluent such as anhydrite, gypsum or starch, e.g. in amount equal to the weight of the powdered condensate, or (b) other fertilizers such as ground ammonium sulphate, e.g. in amount of 10 per cent by weight of the powdered condensate.
Patent GB-625797-A (GB)
Title: Coffee maker
IPC: A47J31/047
Filed: 1947-07-04
Abstract: 625,797. Electrically-heated coffee makers. SUNBEAM CORPORATION. July 4, 1947, No. 17741. Convention date, Oct. 27, 1938. [Class 39(iii)] [Also in Groups VI, XXXV and XXXVII] In an electrically-heated coffee-maker, the electric heating element, 22, is shaped to conform to the dished shape of the bottom of the lower vessel 16 and is held in position by inner and outer clamping rings which engage a threaded portion of the well 24 and a threaded flange respectively.
Patent GB-1503155-A (GB)
Title: Solid plate electric heating units
IPC: H05B3/74
Filed: 1975-04-29
Abstract: 1503155 Resistance heating unit GENERAL ELECTRIC CO 29 April 1975 [10 May 1974] 17752/75 Heading H5H The resistance of a coiled strip-like resistive film 40 bonded to the underside of a solid plate 28 increases in steps from the central zone 72 of a hot zone to the outside of the hot zone, each turn of the coil being of uniform resistance/unit length so that the temperature distribution across the hot zone of the hot plate is substantially uniform. As shown, a resistive film 40 in the form of double spiral is bonded to the underside of a glass-ceramic plate 28. Each turn 74. 76, 78, 80. 82 of the spiral is uniform in thickness throughout its length, but the width of the turns decreases from the inner one 74 to the outer one 82. The resistance per unit length of the turns thus increases from the innermost turn 74 to the outermost turn 82. The film 40 is made of layers of gold and platinum, overlaid at its ends 86, 88 with silver to provide cold terminal connecting ends. A single point temperature control probe 90 is pressed against the film 40. A metal reflector dish 44 is provided. The arrangement described is part of a smooth topped hob provided with four hot zones. A metal plate 42 with four reflector dishes formed therein is joined to the glass-ceramic hob 28 by wrap around channel 48 and retained in the cooking range by a plurality of S-shaped springs 60. In Fig. 4 (not shown) a single spiral pattern, the width of whose turns decreases in steps from the centre outwardly is provided. In Fig. 5, the meandering circular formation provides turns 114, 116, 120, 124 whose width decreases from the centre turn 114, to the outer turn 124. The glassceramic plate 28 may be replaced by a metal plate insulated with porcelain enamel.
Patent GB-219702-A (GB)
Title: Improvements in slow combustion stoves
IPC: F24B13/02
Filed: 1924-07-25
Abstract: - 219,702. Doerfel, R. July 25, 1924. Air-heating stoves; closed solid-fuel stoves; grates; feeding; dampers; linings; covers.-A closed solid-fuel air-heating stove comprises a combustion chamber having refractory walls arranged above an inclined grate the effective area of which is regulatable, and connected to a flue containing air-heating elements exposed to the combustion gases and also to radiation from the hot flue walls. The form shown in Figs. 1 and 3 comprises a hopper a supplying fuel to a grate d past a regulating slide b. The rear wall c of the hopper is hollow and air-cooled. The gases pass up the refractory-walled combustion chamber f, then downwardly, and again upwardly around air-heating tubes k, which may have internal ribs and may, as shown in Fig. 4, be formed in sections each comprising a rib integral with a segment of the wall. The effective area of the grate, a portion of which is imperforate, may be adjusted by moving the grate through pinions e engaging racks on the grate. The grate may be agitated by the same means to clear it from ashes. An aperture g, Fig. 3. serving as a window, and also to admit secondary air, is provided. The top h of the stove forms a hot-plate. In the form shown in Fig. 5, the hollow rear wall c of the fuel hopper a supplies secondary air to the stove. The sliding grate d, at the rear of which is a fixed clinker grate n, may be withdrawn after removing a stop-pin o. An air-supply damper m is automatically adjusted according to the position of the grate through a rod q operated by a cam p on the spindle e. A cover v containing a grid is arranged over the top h and is removed when the latter is in use as a hot-plate. The air-pipes k pass at the top through glands. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a form of the stove having no fuel-hopper, the fuel being fed to the. top of the fuel shaft, at the bottom of which is an horizontal and horizontally-movable grate. This subject-matter does not appear in the Specification as accepted.
Patent GB-339601-A (GB)
Title: Improved manufacture of condensation products of formaldehyde and urea
IPC: C08G12/12
Filed: 1929-06-10
Abstract: 339,601. Kunstharzfabrik Dr. F. Pollak Ges. May 11, 1929, [Convention date]. Condensation products of urea, thiourea, and their derivatives with aldehydes.-Urea-formaldehyde condensation products are prepared by first condensing urea with formaldehyde in aqueous solution in the proportion of one molecule of urea to less than 1.4 molecules of formaldehyde at a temperature not exceeding 70‹ C., and then mixing therewith a similar condensation solution prepared at higher temperature in the presence of an acid and containing at least two molecules of formaldehyde per molecule of urea, the respective quantities of the two condensation solutions being such that the proportions of urea and formaldehyde in the product are in the ratio of 1 to 1.4-1.8. In its simplest form, the first condensation solution may comprise aqueous monomethylolurea and the second a hot acid dimethylolurea solution. Examples are given. The Specification as open to inspection under Sect. 91 (3) (a) also describes the addition of formaldehyde alone to the first condensation solution containing one molecule of urea to less than 1.4 molecules of formaldehyde in order to bring the proportions in the product to one molecule of urea to 1.4-1.8 molecules of formaldehyde. Examples are given of this feature. The Specification also states that thiourea and derivatives of urea or thiourea ma.y replace the urea and that other aldehydes than formaldehyde may be employed. This subject-matter does not appear in the Specification as accepted.
Patent GB-730700-A (GB)
Title: Improvements in and relating to the production of filter elements for filter tip cigarettes
IPC: A24D3/10
Filed: 1953-06-29
Abstract: A filter tip cigarette has a filter element in the form of a cylinder constituted by preferably uniformly-sized particles, bonded together substantially at their points of contact only, of "active" cellulose acetate flake, i.e. cellulose acetate precipitated, as by addition of water, in flocculent form from solution in acetic acid or other solvent and, preferably, then washed.  As described, the cylinder is cut.off from extruded and dried rod formed (1) by spraying sieved particles with an aqueous solution of a water-soluble adhesive such as starch, feculose or methyl cellulose, (2) by mixing sieved particles with such an adhesive in powdered form and moistening as by steaming until the adhesive is dissolved or (3) by treating sieved particles with the vapour of a volatile solvent such as acetone to dissolve their surface only, rod extensions then being dipped into water to restore the particles completely to "active" cellulose acetate flake form.  According to the Provisional Specification, the filter elements may be used in cigarette holders.
Patent GB-748958-A (GB)
Title: Improvements in or relating to the preparation of steroid substances
Inventor: LONG ALAN GIBSON
IPC: C07J75/00
Filed: 1953-06-29
Abstract: The invention comprises 3-keto-4-bromo-allosteroids and a process for their preparation by reduction of a 2:4-dibromo-3-keto-allosteroid to remove one atom equivalent of bromine, and separation of the 3-keto-4-bromo compound from the mixture thus obtained.  The 3-keto-4-bromo-allosteroids may be subsequently dehydrohalogenated to yield 3-keto-D 4-steroids.  Specified reducing agents are chromous salts, titanous chloride, titanous sulphate, hydrogen iodide, zinc-copper couple; and the reaction is preferably effected in a polar organic solvent, e.g. methanol, ethanol, acetone, or acetic acid.  The dehydrohalogenation process may be effected using dimethyl formamide, 2:4-dinitrophenylhydrazine, collidine, or semicarbazide, decomposing any carbonyl derivative produced by treatment with a carbonyl exchange reagent, e.g. pyruvic acid. In examples (1) 2:4-dibromo-3-ketocholestane in acetone is treated with aqueous chromous chloride under nitrogen, yielding 4-bromo-3-keto cholestane. (2) 21 - acetoxy - 2:4 - dibromo - 17 a  - hydroxy-3:11:20 - triketo allopregnane in cooled acetone-methanol is treated with chromous chloride-hydrochloric acid, yielding 21-acetoxy-4 - bromo - 17a  - hydroxy - 3:11:20 - triketo allopregnane on fractional crystallization of the product.  (3) Subsequent treatment of the 4-bromoallopregnane with semicarbazide gives cortisone 21-acetate 3-semicarbazone, which is then stirred with pyruvic acid-acetic acid to yield cortisone 21-acetate.  (4) 2a :4a -dibromo3-ketocholestane is reduced as in (1) with chromous acetate to 4a -bromo-3-ketocholestane.  (5) 21 - acetoxy - 17a  - hydroxyallopregnane-3:11:20 - trione - 20 - ethylene ketal (prepared from dihydroallocortisone 21-acetate by hydrolysis of the ester group formation of the 3:20-bisethylene ketal, and re-acetylation and splitting of the 3-ethylene ketal group), is brominated in methylene chloride-ether to give the 2a :4a -dibromo derivative, which is then reduced with chromous chloride to 21-acetoxy-4a  - bromo - 17a  - hydroxyallopregnane-3:11:20 - trione - 20 - ethylene ketal, which is treated as in (3) to give the 20-ethylene ketal of cortisone 21-acetate.  Specifications 746,488 and 748,779 are referred to.
Patent GB-613552-A (GB)
Title: Improvements in or relating to granule telephone transmitters
IPC: H04R21/02
Filed: 1946-06-14
Abstract: 613,552. Carbon-grain microphones; diaphragms. STANDARD TELEPHONES & CABLES, Ltd. June 14, 1946, No. 18009. Convention date, Oct. 29, 1943. [Class 40 (iv)] In a non-corrodible granule microphone capsule all the conducting parts except possibly for an external connecting member are made of conductive, e.g. graphite-impregnated, synthetic resin. In the capsule shown the electrical circuit is completed from the casing 1 to the diaphragm 3, the granule chamber 5 and the metal rivet 6 of which all except the last are of conductive synthetic resin. Insulating washers 8, 9 separate the rivet from the casing. The granule chamber cover 5 is closed by a cellulose acetate cover 6 and a felt pad 7 acts as a buffer between it and the diaphragm.
Patent GB-315397-A (GB)
Title: Manufacture of glacial acetic acid from dilute acetic acid
IPC: C07C51/42
Filed: 1929-06-12
Abstract: 315,397. I. G. Farbenindustrie Akt.- Ges, July 14, 1928, [Convention date]. Right to Patent relinquished. Addition to 312,173. Acetic acid.-Dilute acetic acid is concentrated to about 60 per cent strength by freezing out the water as described in the parent Specification. and then converted into glacial acid bv any process other than one making use of an addition compound of acetic acid with another substance. Thus, the 60 per cent acid may be treated with solvents in the cold, or distilled with substances forming azeotropic mixtures with water, or the vapour of the 60 per cent acid may be treated with extracting agents of high boiling point, or substances which bind water chemically or physically may be added to the 60 per cent acid, so that concentrated acid can be distilled off in known manner. In the examples, (1) to (3) the 60 per cent acid is treated with chloroform, ethyl chloride, and methyl chloride respectively in counter current, the operation being performed under 5 atm. pressure in the last case: (4) and (5) the 60 per cent acid is mixed with phosphorus pentoxide and anhydrous aluminium sulphate respectively.