baber/WOPTO huggingface dataset:
Patent GB-777083-A (GB)
Title: Process for obtaining partly frozen mixtures of lower aliphatic acids and anhydrides
IPC: C08B3/06
Filed: 1955-03-02
Abstract: A process for the production of a partly frozen mixture of a lower aliphatic acid (defined as an aliphatic acid containing up to 4 carbon atoms in the molecule) and a lower aliphatic acid anhydride, suitable for use in the production of cellulose esters, comprises cooling the acid in the absence of the anhydride, or in the presence of less anhydride than is required in the final mixture, until the acid is partly or completely frozen, and then adding sufficient liquid anhydride to cause some of the solid acid to melt and yield a final mixture of the desired composition.  Preferably the anhydride added to the solid acid is at a temperature not higher than that of the acid.  The process is particularly of use for mixtures which are finally to contain more than 20 per cent of anhydride, and it may also be employed where the anhydride is derived from a different acid from the one with which it is to be mixed.  Examples are given of the production of acetic acid-acetic anhydride mixtures.ALSO:A process for the production of a partly frozen mixture of a lower aliphatic acid (defined as an aliphatic acid containing up to 4 carbon atoms in the molecule) and a lower aliphatic acid anhydride, suitable for use in the production of cellulose esters, comprises cooling the acid in the absence of the anhydride, or in the presence of less anhydride than is required in the final mixture, until the acid is partly or completely frozen, and then adding sufficient liquid anhydride to cause some of the solid acid to melt and yield a final mixture of the desired composition.  Preferably the anhydride added to the solid acid is at a temperature not higher than that of the acid.  The process is particularly of use for mixtures which are finally to contain more than 20 per cent of anhydride, and it may also be employed where the anhydride is derived from a different acid from the one with which it is to be mixed.  Examples are given of the production of acetic acid-acetic anhydride mixtures.
Patent GB-854241-A (GB)
Title: Improved braided structure
IPC: D04C1/00
Filed: 1957-02-25
Abstract: 854,241. Braid. HUPPERTSBERG, K., HUPPERTSBERG, G., and HUPPERTSBERG, A., [trading as HUPPERTSBERG, A. [Firm of]]. Feb. 25, 1957 [May 17, 1956], No. 6317/57. Class 74 (1). In a close, compact 1 Î 1 braid of bast-like synthetic threads 6 there are inserted, under tension and without intertwisting or interbraiding, elastic warp strands 7, which are arranged in a group of closely adjacent strands or in spaced groups thereof, so that the braid is ruched in those parts 9 lying adjacent said group, or between and/or adjacent said spaced groups; and on the back of at least the ruched part or parts there is provided a covering consisting of one or more smooth elastic strips of woven or braided material 10. The warp strands 7 may themselves be narrow braided strands of threads of fibrous material containing warp threads 8 of rubber or latex, or small woven strips containing rubber warp threads, or rubber or latex strips covered with a fibrous substance. Non-resilient warp threads 13 of a different colour from the threads 6, and preferably of softer material such as cotton, staple fibre, art silk, or the like, are incorporated in, say, adjacent pairs or groups. Where the backing fabric is in strips over the ruched parts, the strips are secured by zig-zag seams; and the braid may be curved, during manufacture, by sewing on these strips at various parts of the width of the braid in different states of tension. The material is used for the strap-like uppers of sandals.
Patent GB-790111-A (GB)
Title: Improved electrical defrosting means for use with refrigeration apparatus
IPC: F25D21/08
Filed: 1954-03-04
Abstract: 790,111. Defrosting by electric heating. HERON, A. G. March 3, 1955 [March 4, 1954, June 22, 1954]. Nos. 6330/54 and 18257/54. Class 39(3) [Also in Group XIII] An insulated heating conductor 3 of copper is secured to an evaporator 1 by clips 4 and is connected across the centreearthed secondary winding to a stepdown transformer 5. Current in the conductor 3 is controlled by a time switch 6 and by a pressure switch 7 which is operated by the pressure inside the evaporator. Alternatively, a pressure thermostat control may replace the switch 7, Fig. 2 (not shown). In a forced air type of evaporator having cross-fins in close proximity to one another, the fins may be drilled to receive the heating conductor which may be connected to a similar conductor on a drip mat. For defrosting plate type evaporators, clips may be soldered to the plates for receiving the conductor which may be of metal other than copper, having a specific resistance not greater than that of steel, and be coated with corrosion resistant metal such as zinc, lead or tin prior to being insulated with tetrafluoroethylene, rubber, enamel or other suitable material. The secondary winding of the transformer is preferably not more than 30 volts to earth. According to the first Provisional Specification a resistance heating wire may be wrapped around in close contact with the evaporator.
Patent GB-810314-A (GB)
Title: Improvements in and relating to piping seams in flexible materials
IPC: A41D27/24
Filed: 1956-02-29
Abstract: 810,314. Trimmings. MOLDAU, H. Feb. 20, 1957 [Feb. 29, 1956], No. 6348/56. Class 141 A piping and binding element comprises a flexible strip of rubber or synthetic plastic material including a solid or hollow beading g integral with a longitudinal web h which is bifurcated at its free edge to form two integral wings i. The included angle between each wing and the web is not greater than 90 degrees. The beading g is preferably of circular or oval cross-section and may include a wire core. In use, the element is inserted in the seam and the wings i folded as in Fig. 2 to cover the raw edges d the assembly being secured by stitching or heat-sealing. The Provisional Specification describes also an element wherein the wings form parallel extensions of the web.
Patent GB-1131302-A (GB)
Title: Improvements in magnetically actuable switch assemblies
Inventor: COLLINS DEREK NORMAN
IPC: H01H63/20
Filed: 1965-02-15
Abstract: 1,131,302. Electromagnetic switches. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 17 Feb., 1966 [15 Feb., 1965], No. 6365/65. Heading H1N. A sequence operable relay has sealed magnetic contact units in housings 13 between aligned limbs 15, 18 of two laminated yokes 11, 12. Twenty-four contact units are provided and the corresponding limbs 15, 18 accommodate respective coils 20, 27. The coils 20 are interconnected (Fig. 3, not shown) to form a two-phase, twelve-pole, half-pitch, double-layer winding around the yoke 11 and the coils 27 are interconnected (Fig. 4, not shown) to form a three-phase two-pole, full pitch star connected winding around the yoke 12. Energization of coils 27 at one frequency (10 c.p.s.) and of coils 20 at a higher harmonic (60 c.p.s.) produces a rotating field with a relatively sharp peak (Figs. 5, 6, 7, not shown) which effects operation of the contacts, one set at a time, in sequence, the twenty-four contacts sets being operated once a cycle of the current in coils 27. The contact units are magnetically biased to limit operation to " positive " values of m.m.f.
Patent GB-692744-A (GB)
Title: A base for use in copying in loose-leaf account books
IPC: B41L3/20
Filed: 1951-03-16
Abstract: 692,744. Book-keeping; manuscript books. AKTIEBOLAGET GALCO. March 16, 1951. [March 30, 1950] No. 6422/51. Class 16. A base, for carbon copying by hand onto journal leaves from account leaves attached in a loose leaf book by prongs 3, comprises an attaching plate 1, provided with hook shaped projections 2 forming notches 2<SP>1</SP> into which the prongs 3 enter to retain the base in the book, and a writing plate 5 hinged to the opposite edge to swing upwardly and preferably also displaceable longitudinally of the plate 1, the plate 5 carrying a retaining device 9, 10 fur the journal leaf and of such width that its free edge 5<SP>1</SP> wholly or partly covers the notches 2<SP>1</SP> in writing position so that the outer edge 5<SP>1</SP> bears on the attaching prongs 3. Both plates 1 and 5 are preferably bent downwardly near the prong 3 so as to fit easily into the loose leaf book and the hinge connection comprises a channel shaped guide 6 secured to plate 1 in which a runner 7 secured to plate 5 is rotatable and slidable, the plates 1 and 5 in writing position being a short distance apart. To retain the journal leaf on pins 10, a bar 9 having recesses 11 corresponding thereto, is mounted on hinges 8 at the edge of plate 5 and is lifted against springs, urging it into gripping position, by finger grips 14. Carbon paper may also be secured on the pins 10 or resilient clamps 15 may be provided, each comprising a plate of spring steel slit to provide a finger member 16<SP>1</SP> at one end, a tip 17, offset downwardly and secured to the plate 5 through holes 19, and a tip 18 which bears resiliently against the carbon paper and is lifted by pressing on the member 16<SP>1</SP>.
Patent GB-129052-A (GB)
Title: Improvements in and relating to Parachutes.
Inventor: MINVALLA PHEROZE EDWARD JAMES
IPC: B64D17/00
Filed: 1918-04-16
Abstract: 129,052. Minvalla, P. E. J. April 16, 1918. Parachutes.-In a parachute for use with aircraft and of the type discharged by firing an explosive charge, means are provided for coupling the parachute to the aircraft so that, after being discharged, it may be towed in expanded form and released from the aircraft when desired. The parachute and rigging are folded in the manner shown in Fig. 1 around a sleeve 9 arranged between a piston 6 and the cover 3 of an enclosing barrel A. The rigging is connected to an anchor ring 2, which is connected to the aviator's harness and retained on the barrel by loops 13 engaging bolts 12. The ring 2 is further connected by a rupturable cord 11 to the cover 3. When the contents of the barrel are ejected by firing a cartridge 41, the cover 3 is checked in its advance until the cord 11 breaks, thereby causing the folds of the parachute to open out. The parachute is released, when desired, by rotating a ring 16 carrying the bolts 12. In a modification, Fig. 9, the ring 2, as the parachute is ejected, engages hooks 32 as shown at 2<1>. the hooks being carried by a ring 30 which may be released when desired.
Patent GB-1193882-A (GB)
Title: Improvements in or relating to Release Agents
Inventor: CARR GEORGE CUTHBERT
IPC: B29C33/60
Filed: 1968-02-09
Abstract: 1,193,882. Wax dispersion. BRITISH DOMESTIC APPLIANCES Ltd. 10 Feb., 1969 [9 Feb., 1968], No. 6527/68. Heading B1V. [Also in Division B5] A release agent for use in moulding foamed plastics materials comprises a dispersion of wax in a liquid medium consisting essentially of water or a chemically inert vegetable oil. The wax may be a mixture of carnauba wax, beeswax and paraffin wax comprising 15-25 wt. % of the dispersion and the liquid medium may be castor oil or water and may contain minor amount of viscosity modifying or emulsifying additives, for example triethanolamine, stearic acid. Specified compositions are (by weight) 3% carnauba wax, 6% beeswax, 9% paraffin wax, 4% stearic acid, 2% triethanolamine and 76% water and also 7.5% carnauba wax, 7.5% (beeswax, 7.5% paraffin wax, 77.5% castor oil and a quantity of air introduced by beating for up to one hour to reduce the viscosity of the castor oil.
Patent GB-1206993-A (GB)
Title: Improvements in or relating to the treatment of foams
Inventor: BRISBOURNE RICHARD PAUL
IPC: C08J9/42
Filed: 1968-02-09
Abstract: 1,206,993. Flame-resistant foamed materials. REVERTEX Ltd. 28 Jan., 1969 [9 Feb., 1968], No. 6616/68. Heading B2E. A flexible, cellular foamed material having open 'interconnecting cells is treated to impart flame-resistance thereto by impregnating with a solution or dispersion of a polymer which also contains solid particles of a compound which generates a non-combustible gas upon heating, drying the impregnated foam, so that the walls are coated with a layer of the polymer in which the particles are dispersed, the polymer being such that the flexibility of. the foamed material is not impaired. The impregnation may be effected by squeezing the foam through rollers immersed in a bath of the polymer emulsion or solution and allowing it to expand while immersed in the bath and then passing it through more rollers which express excess liquid. The polymer may be a homopolymer of vinyl acetate, vinyl chloride or vinylidenechloride or hompolymers of these. The polymer may be plasticised particularly with plasticisers having fire-(retardant properties such as trichloroethyl phosphate, tritolyl phosphate and trixylyl phospate. The compound for generating the non-combustible gas may be magnesium carbonate, sodium carbonate, gypsum hydrate, alumina hydrate or an organic compound generating nitrogen on heating. The foam material may be of polyurethane.
Patent GB-101836-A (GB)
Title: Improvements in and relating to Anti-torpedo and Anti-mine Armour for Marine Hulls.
Inventor: MURRAY JOHN
IPC: B63B3/10
Filed: 1916-05-09
Abstract: 101,836. Murray, J. May 9, 1916. Torpedo screens; protecting; fenders.-Comprises sectional and adjustable armoured resilient screens for protecting ships from mines, torpedoes and other causes of wreck. As shown in Figs. 1 and 2, hollow sections, armoured outside and arranged in vertical columns and horizontal rows, are each fitted with springs and supplied with compressed air. The lowest section of each vertical column is secured to the hull at C<20>, but, when released the whole column may be lifted by cables C<3> attached to eyebolts C<2>. Each section is fitted with a pressure gauge, a series of such gauges being arranged on a single board. The compartments F contain tubes Q, through which the packed air supply pipes L pass. When the pipes are withdrawn to allow the removal of a section, additional security is effected by the spring gravity slides, Fig. 5, which close the ends of the tubes Q.
Patent GB-470355-A (GB)
Title: Improvements in or relating to electromagnetic interrupters
IPC: H04M19/02
Filed: 1936-03-05
Abstract: 470,355. Converting. ERICSSON TELEPHONES, Ltd., and DISTIN, L. S. March 5, 1936, No. 6658. [Class 38 (ii)] [Also in Group XXXVII] In an electromag netic interrupter em ployed as a polechanger for the con version of direct tc alternating current the armature constitutes forms part of or is mounted upon a tuned reed and self-interrupt ing contacts are operated by said reed, a copper slug or like low resistance path for eddy currents is provided on the operating magnet core adjacent the air gap between the armature and core, so that variations in the amplitude of vibration of the reed due to variations in supply voltage are prevented or reduced. As shown in the Figure, the interrupter comprising a winding P, copper slug S and polepiece E has a vibrating reed tunable by a movable mass M and adapted to operate a self-interrupting contact 2 and to engage alternately a pair of contacts 3, 4, connected to the two halves of the primary winding W1 of the transformer T. Spark quenches Q1, Q2, each comprising a resistance and capacity, are connected across the two sets of contacts in the primary circuit and the secondary winding W2 may be bridged at Q3 by a resistance and capacity to improve the wave form of the desired current.
Patent GB-572222-A (GB)
Title: Improvements in thrust bearing
IPC: F16C17/04
Filed: 1944-04-11
Abstract: 572,222. Thrust bearings. SVENSKA TURBINFABRIKS AKTIEBOLAGET LJUNGSTROM. April 11, 1944, No. 6666. Convention date, April 30, 1943. [Class 12 (i)] A thrust bearing for a rotary machine part, such as a turbine shaft required to be accurately located, comprises a thrust disc 2 on the machine part (shaft 1) which engages between bearing blocks 4, 5 axially slidable with a play b in an inner casing 6 which is itself axially slidable with a play a in the main casing or housing 8, the inner casing being provided with ports 19, 20 in its end walls, whereby pressure fluid admitted to spaces 15, 16 outside the ends of the inner casing has its escape through such ports throttled by the bearing blocks 4, 5 thereby to set up pressure conditions such that the inner casing is forced in the direction reverse to the shaft thrust to a location such that the shaft is displaced by an amount a - b. If a=b, the shaft has an invariable location ; or a - b may be such as to compensate for thermal expansion. The end faces of the inner casing have projections 13, 14 to limit the movement and so to provide the spaces 15, 16 for the pressure fluid admitted by a pipe 18 and passageway 17. With the shaft 1 subject to a thrust to the left, as shown by arrow 30, the bearing blocks will be moved to the left, thereby to throttle the escape of pressure fluid through port 19 so setting up pressure in the space 15 which forces the inner casing 6 to the right. The pressure of the fluid may be derived from the centrifugal action arising in a radial entry conduit in the shaft and thrust disc, Fig. 2 (not shown), or from the bearing-block film-pressure, Fig. 3 (not shown), in which latter case the bearing blocks move axially with respect to the thrust disc.
Patent GB-680998-A (GB)
Title: Process of coating paper
IPC: D21H19/20
Filed: 1949-03-11
Abstract: 680,998. Coating paper webs; glazing paper. CLAYTON, T. A. (United States Rubber Co.). March 11, 1949. No. 6679/49. Drawings to Specification. Classes 96 and 140. Paper is glossed by coating with an aqueous dispersion of one of the synthetic resins listed below and which has a second order transition temperature, T<SP>2</SP>, between 40‹C and 125‹C, heating the coated paper to a temperature between 20‹C and 60‹C above T<SP>2</SP> to dry and set the coating, pressing the coated paper against a highly polished roll heated to a temperature between 40‹C and 80‹C above T<SP>2</SP> and stripping the paper from this roll at this temperature. The operations are performed continuously upon a web of paper. The synthetic resins, which have a M.W. above 25,000 are polystyrene, polythene, polyvinyl chloride, polyvinyl alcohol, polymethylmethacrylate, vinyl chloride-vinyl acetate copolymer, copolymers of styrene with butadiene 1, 3 or acrylonitrite, and acrylonitrite-isobutylene copolymers. The aqueous dispersion may contain emulsifying or dispersing agents and may be made of the preformed polymer or may be obtained by the emulsion polymerisation of the monomeric material. Specification 473,657 is referred to.
Patent GB-768672-A (GB)
Title: Improvements in or relating to movable mineral-boring (rock drilling) apparatus for mining operations
IPC: E21B7/02
Filed: 1953-03-11
Abstract: 768,672. Rock drills. WALLRAM HARTMETALL GES. March 11, 1953 '[March 11, 1952], No. 6718/53. Class 124 [Also in Group XXI] A rock drilling machine comprises a trolley on which are mounted one or more drills of large diameter and surrounding them a plurality of drills of smaller diameter, the speed of drilling being such that all the holes are completed at the same time. As shown a drill 18 of reatively large diameter, e.g. 8 inches, is mounted centrally on a trolley 3 which may, be clamped to rails 2, and a number of smaller drills 11, 12 are carried on bracket members 5a, 5b mounted on the trolley for pivotal movement about axes parallel to the longitudinal axis of the trolley. The central drill may be angularly and vertically adjustable and the small drills may also be adjusted parallel to the central drill whether the latter is adjusted angularly to the centre line of the trolley or not. The trolley may also carry a device, e.g. a light and template to indicate the position of the holes.
Patent GB-792830-A (GB)
Title: Method of separating aromatic secondary amines from mixtures of aromatic primary and secondary amines
IPC: C07D209/48
Filed: 1955-03-08
Abstract: Secondary amines are separated from a mixture of primary and secondary amines by treating the mixture with an anhydride of a dicarboxylic acid in the ratio of not less than 1 mol. of anhydride for each mol. of primary amine present and separating the secondary amine from the reaction product by distillation. When a mixture of primary and secondary amines is treated with phthalic anhydride at room temperature, phthalamic acids corresponding to primary and secondary amines are formed.  If the mixture is then heated to 100-180 DEG  C. the phthalamic acid corresponding to the primary amine loses water and is converted to the imide of the dicarboxylic acid.  Instead of phthalic anhydride there may be used maleic or hexahydrophthalic anhydride.  This is an irreversible reaction.  In the case of the secondary amine no internal imide is formed.  If, however, excess primary amine is present at this temperature this reacts with the phthalamic acid of the secondary amine and the imide corresponding to the primary amine is formed together with the secondary amine.  Tertiary amines do not enter into this reaction. The reaction is preferably carried out at a temperature up to 180 DEG C. using some excess of anhydride, and the unchanged secondary amine distilled off.  Any secondary amine held back by excess anhydride may be recovered by heating with a further quantity of primary amine or of the crude mixture containing primary and secondary amine.  The anhydride, preferably in solution, to prevent caking at the entrance to the reaction vessel, can be added as the acid amide corresponding to the secondary amine in the mixture.  Examples are given for the separation of aniline from mixtures containing aniline, monoethylaniline and diethylaniline.
Patent GB-474902-A (GB)
Title: Improvements in and relating to percussive tools
IPC: F23K5/20
Filed: 1936-03-06
Abstract: 474,902. Percussive tools. SIEMENSSCHUCKERTWERKE AKT.-GES. March 6, 1936, No. 6810. Convention date, March 6, 1935. [Class 124] [Also in Group XXIV] The recoil forces of a percussive tool are balanced by one or more reciprocating masses moved solely by mechanical means. The reciprocating trip 4 and the blow forces are balanced by the sleeve-like weight 12 which reciprocates in accordance with the cam 9 mounted on the rotary actuating shaft 7. The cam 9 and the roller 10 are maintained in contact by the spring 17. Parts of the actuating mechanism may be used as a balance weight.
Patent GB-580499-A (GB)
Title: Improvements in building constructions
IPC: E04G11/22
Filed: 1944-04-13
Abstract: 580,499. Moulding concrete buildings. DAVIES, J. A. April 13, 1944, No. 6810. [Classes 20 (ii) and 20 (iv)] Shuttering for erecting two or more walls of a building is elevated on a framework by interconnected screw-jacks. The inner and outer shuttering 17, 16 respectively are connected together at the top and are adapted to be raised by jacks operated by worm gearing 22 connected by shafts 19 to a hand wheel 20. The outer shuttering is guided and raised by a block 14. Fig. 4 grooved to engage guides 10 and threaded to engage the vertical screw 15 of a lifting jack. To allow the shuttering to be eased away from the cast wall surfaces dumb-bell shaped members 24 Fig. 7 are cast in the concrete and internally and externally threaded annular members 25 engage inner threaded portions of the member 24 and on the outside of a threaded spindle 26. The members 25 are rotatable to ease away the shuttering. Cavity walls are constructed by means of shuttering 28 Fig. 6, laterally movable on a cross-piece 31 supported from shuttering 16, 17 by means of wedges 29, 30 and screw adjustable device 33-35. A reinforced concrete roof may be cast on steel sheets carried on angle iron members and left in position. The downwardly depending flanges of these members act as strips to keep the weather out. Short steel tubes may be set in the interior faces of the walls into which wooden plugs are driven for the attachment of wood strips for supporting interior wall surfacings.