baber/WOPTO huggingface dataset:
Patent GB-1037474-A (GB)
Title: N-substituted polyamides and filaments therefrom
Inventor: COWELL CLIFTON DOUGLAS
IPC: C08G69/08
Filed: 1964-04-21
Abstract: The invention comprises N-substituted polyamide filaments in which the degree of N-substitution is between 15 and 34% and which have a tenacity of at least 0.2 g. per denier, an Elastic Recovery from 50% extension of at least 40% and which do not discolour when exposed to a Xenon arc or bleached with sodium chlorite in accordance with the Light Resistance and Bleeching Resistance tests described below. Degree of N-substitution refers to the number, expressed as a percentage of amide nitrogen atoms which are replaced by hydrocarbon or substituted hydrocarbon groups in the polyamide. The Light resistance of the filaments is tested by exposing them to a Xenon arc for 300 hours and the Bleeding resistance is tested by immersing the filaments for 45 minutes in an aqueous solution containing 0.1% by weight of sodium chlorite and 0.5 c.c. per litre of glacial acetic acid maintained at 85 DEG  C. so that the solution has a pH of 4. They may be prepared by reacting, at elevated temperature and in the presence of a polymerization catalyst, a lactam of an aminocarboxylic acid and an N-substituted omega amino-carboxylic acid having at least 7 carbon atoms in a molar ratio of 1:0.177 to 1:0.50 respectively and then melt-spinning the polyamides so produced into elastic filaments. Suitable lactams are caprolactams, enantholactams and capryllactams or mixtures of two or more of these lactams, whilst suitable N-substituted omega-amino-carboxylic acids are N-alkyl omega amino-carboxylic acids such as N-methyl, ethyl, n-butyl or iso-butyl omega-amino undecanoic or dodecanoic acid.  The preferred polymerization catalysts are either neutral or acid catalysts such as strong mineral acids, dicarboxylic acid salts of aliphatic diamines and water.
Patent GB-1465036-A (GB)
Title: Amplifier circuit
IPC: H03F1/32
Filed: 1975-04-22
Abstract: 1465036 Transistor amplifier PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 22 April 1975 [25 April 1974] 16556/75 Heading H3T In an amplifier comprising a D.C. chain of at least three transistors in series, e.g. 13, 15, 17, 11, the bases are in parallel on A.C., while the final collector 11 feeds an output terminal under a load 33, the emitters being commoned through individual resistors. The collectors and bases of 13, 15, 17 are respectively A.C. coupled to the emitter and base of transistor 11, providing low distortion, aided by negative feedback across emitter loads 23, 25, 31, in spite of the low supply voltage. The main D.C. chain runs via load 33, transistors 11, 13, choke 19, transistor 15, choke 21, transistor 17 and emitter resistor 31, while the base D.C. chain runs via input buffer 3 through diodes 5, 7, 9, having negligible A.C. impedance, to current sink 10. The A.C. component of collector current of transistor 11 closely follows its A.C. emitter current made up of the A.C. collector currents of transistors 13, 15, 17. Decoupled resistors or other low A.C. impedance means may replace diodes 5, 7, 9.
Patent GB-1175735-A (GB)
Title: Aircraft Undercarriage
Inventor: PERDUE JACK
IPC: B64C25/60
Filed: 1967-04-11
Abstract: 1,175,735. Fluid suspension units. ELECTRO-HYDRAULICS Ltd. 4 April, 1968 [11 April, 1967], No. 16568/67. Heading F2S. [Also in Division B7] An aircraft undercarriage comprises a main member 1 adapted (e.g. by a boss 2 and a collar 4) for connection to an aircraft, a tubular member 8 slidable in the member 1, a releasable locking means (e.g. lever 48 engaging teeth on a sleeve 41 fixed on the member 1) to prevent relative rotation between the members 1 and 8, and releasable by extension of the undercarriage whereafter cam means (e.g. as at face 60) bias the members 1 and 8 to a preferred relative orientation, between members 1 and 8 there being shock absorber means (e.g. a free piston 18 within member 8 chambers 12, 13 and 15 containing oil passable through passages 11, 14, 14a, and chamber 19 containing air which acts as a spring). The locking means may be released by a pin 52 on an arm 53 on a togglelinkage 26, 27 engaging the end 51 of the lever 48, when the undercarriage extends. Rotation of the member 8 when the undercarriage is loaded is resisted by a cam lever 33 pivoted by the toggle link 27 forcing a ring 35 upwards, and a ring 56 (carried by a sleeve 29) downwards into frictional engagement with parts fixed on the member 1 to provide shimmy damping. The undercarriage may carry a wheel (or a pair of wheels) on an axle 24 at its lower end, and may have a rotating seal (from an inlet 42 via a groove 44 and a hole 36) for supplying pressurized fluid to a brake on the wheel(s).
Patent GB-824630-A (GB)
Title: Motor fuel
IPC: C10L1/182
Filed: 1958-05-23
Abstract: An anti-stalling gasoline contains less than 2% by volume, but sufficient to decrease stalls due to icing, of a mixture of a minor proportion of an aliphatic diol or mixture of diols having from 4 to 21 carbon atoms per molecule and a major proportion of an aliphatic monohydric alcohol or mixture of such alcohols having from 1 to 3 carbon atoms per molecule.  Preferred diols have an alkyl radical directly attached to at least one of the carbon atoms to which an hydroxyl group is attached, the alkyl group containing from 1 to 4 carbon atoms.  Specified diols are hexylene glycols exemplified by 2-methyl - 2,4 - pentane diol and hexane diol-2,5.  2 - Methyl - pentene - 5 - diol - 2,4 1,3-dimethyl - butane - diol - 2,3, and 2 - methylpentane-diol-1,3 can also be used.  Specified monohydric alcohols, are methyl, ethyl, n-propyl, iso-propyl and allyl alcohols. The volume per centages of diol and monohydric alcohol used lie in the ranges 0.01 to 0.095 and 0.40 to 1.8 respectively, the ratio, by volume, of alcohol to diol being between 10 : 1 and 30 : 1.  The gasoline composition can include also unspecified gum solvents, alkyl-lead antidetonants, lead scavenging agents, dyes, gum inhibitors, anti-oxidants, rust preventives, and metal deactivators.
Patent GB-332006-A (GB)
Title: An improved appliance for use in the extermination of weeds
IPC: A01M21/04
Filed: 1929-05-30
Abstract: 332,006. Rich, H. C. May 30, 1929. H a n d tools for destroying w e e d s ; scoops.-A hand appliance for distributing weed-killing powders comprises a cylindrical container having a transverse perforated disc removably secured in it adjacent an open end to support the powder, the arrangement being such that when the container is held with the open end downwards above a weed and is dropped or bounced a small quantity of powder is forced downwards through the perforated disc on to the weed. The container 1 is provided at the upper end with a handle, or with a closing partition 6 and a tubular extension 1a forming a handle, or furnished with a handle 7. The removable perforated disc 2 may be attached to strips 4 fastened to a flanged collar 5 inserted into the open end of the tube, or into a sleevelike extension 5a. A scoop 8 of the shape shown in Fig. 3 may be attached to the disc 2 for use in filling the container 1. In a modification both ends of the tube 1 may be provided with a perforated disc 2, a rubber cover, serving as a handle, being applied to either end. The appliance may be hung up by means of a ring 9.
Patent GB-1207787-A (GB)
Title: Gibberellin preparations
Filed: 1969-03-31
Abstract: 1,207,787. Solubilizing gibberellins. TAKEDA YAKUHIN KOGYO K.K. 31 March, 1969 [30 March, 1968], No. 16667/69. Heading C2C. [Also in Division C1] The solubility of gibberellin (plant growth regulator) in water is enhanced by admixing therewith one or more amino acids selected from (i) neutral amino acids having a pKa value of 3 to 5, (ii) salts of acidic amino acids having a pKa value of 3 to 5, and (iii) basic amino acids having a pKa value of 8 to 13. Specified amino acids are:-(i) # - amino - n - caproic acid, 7 - amino - n - heptanoic acid, tranexamic acid, 8 - amino n - valeric acid, # - alanine, # - amino - n - butyric acid, # - amino - i - butyric acid, γ - amino - n - butyric acid, and γ - amino - n - valeric acid; (ii) monosodium or monoammonium glutamate; and (iii) arginine or lysine.
Patent GB-1518458-A (GB)
Title: Pneumatic apparatus
IPC: D01H11/00
Filed: 1976-04-23
Abstract: 1518458 Removing particulate matter from textile machines HUBERT SOHLER GmbH 23 April 1976 [25 April 1975] 16670/76 Heading F4X [Also in Division D1] A pneumatic cleaning apparatus for use with spinning or like textile machines and which may be mobile along a trackway or rail 1, Fig. 1, comprises an air fan or blower 4 interconnecting suction members 8, 9, 10, 11 and pressure members 6, 7a, 7b in the form of nozzles. A pair of filters 12, 16 between the suction members and fan are alternately cleaned by preventing flow of the suction air stream through one filter by closure of a shut-off flap valve 15 or 19 positioned between the filters and fan and diverting at least part of the pressure air cleaned by the other filter through lateral air blast duct 20 or 23, Fig. 2. Each duct contains a changeover valve 21, 24 connected by linkage 22, 25 to the flaps 15, 19 respectively. With both the shut-off valves 15, 19 open or when cleaning the filter with one valve open the pressure air stream is directed to atmosphere through branches 20a, 23a. A filter box 13, 17 upstream of each filter registers therewith and is covered by a filter box cover 14, 18. In a modification, the filter box has a sloping openable floor cover for emptying fibre dust into a storage container disposed laterally of the rail or trackway.
Patent GB-805861-A (GB)
Title: Catalysts
Inventor: ELLINGER LEO PHILIPP
IPC: C07C29/42
Filed: 1956-05-31
Abstract: The invention is a modification of the invention described in the parent Specification and comprises a process for the preparation of a copper acetylide catalyst by first preparing a basic copper silicate material containing 15 to 60 per cent by weight of copper by mixing a copper salt with a solution of an alkali metal silicate and sodium hydroxide, potassium hydroxide or ammonium hydroxide, and then treating the basic copper silicate material with acetylene to convert the copper content of the material to copper acetylide.  The basic copper silicate material is separated, washed and dried, may be mixed with kaolin, and may be impregnated with further amounts of copper by immersion in a solution of a copper salt.  It is converted to the copper acetylide catalyst by adding it to aqueous formaldehyde solution and treating it with acetylene at a temperature above 60 DEG C.  In examples, copper nitrate solution is reacted with a solution of water-glass and sodium hydroxide, and the product is washed, dried, roasted, and treated with acetylene in a solution of formaldehyde.ALSO:2-Butyne-1 : 4-diol is prepared by reacting acetylene and formaldehyde using a copper acetylide catalyst as described in the parent Specification, with the modification that the catalyst is prepared by first obtaining a basic copper silicate material by reacting a copper salt with an alkali metal silicate and sodium hydroxide, potassium hydroxide or ammonium hydroxide, and then treating the basic copper silicate material with acetylene to convert the copper content of the material to copper acetylide. The basic copper silicate material is added to aqueous formaldehyde heated to above 60 DEG  C. and acetylene passed in, which converts the copper compound to copper acetylide which then catalyses the reaction between acetylene and formaldehyde, 2-butyne-1 : 4-diol being obtained together with a small amount of propargyl alcohol.  Examples are given.
Patent GB-240576-A (GB)
Title: Improvements in or relating to loading machines
IPC: E21D9/12
Filed: 1924-07-14
Abstract: 240,576. Joy, J. F. July 14, 1924. Controlling different functions by same handle or lever. - A self-propelled machine for loading coal into trucks comprises an endless-track vehicle with a combined elevator and conveyer mounted longitudinally and extending forwardly and rearwardly of the chassis, and with transmission mechanism bv which one motor drives the traction treads and the elevating and conveying mechanism as may be desired. The treads may be driven and braked independently for steering. The motor shaft is arranged longitudinally of the chassis, and projects in both directions from the motor casing, the rear end being connected to the propelling mechanism and the forward end to the conveyer mechanism. The motor 14 drives a differential gear 17 through a friction clutch 15 and reversing gearing B. The driven shafts 27, 28 of the differential gear are provided with brake drums 29, 30 and drive the traction treads through reduction gearing comprising spur gearing 33 and chain-and-sprocket gearing 31a, 11<a>. The clutch 15 is controlled for starting and stopping by a hand-lever 77 through the connections 78 - - 81. The brakes 29, 30 are controlled for steering by a hand-lever 87 on a spindle 86 which can slide in slots of the side plates 75. The spindle 86 has arms 88, 91 extending in opposite directions and connected with the brake-bands by rods 90, 92. When the lever 87 is swung forwards or backwards, one or other of the brake-bands is tightened so as to hold one member of the differential gear and transmit the drive to the other side of the machine. When the lever 87 is in mid-position, both brake-bands are free. When the lever 77 is moved forwards to release the clutch 15, cams 78 move the spindle 86 forwards and both brake-bands are applied, stopping the machine. The clutch element 26 of the reversing gearing B is controlled by a hand-lever. Specifications 151,030 and 151,228, [Class 78 (i), Conveyers &c.], are referred to.
Patent GB-814854-A (GB)
Title: Arrangement in diving or flying outfits
IPC: A62B17/04
Filed: 1957-05-28
Abstract: 814,854. Diving and flying suits. NAVAL & CO., A. B. May 28, 1957 [May 30, 1956], No. 16895/57. Class 68(2) A diving, or flying, suit having a hood 2 made e.g. of supple rubber for tightly enclosing the head, an aperture 3 for the face, and a separate rubber mask 5 for covering the face, is characterized in that passages are provided through those portions of the hood which contact the ears, and a pipe is connected between each of these passages and an air space separate from that of the hood, e.g. the space within the mask 5. The mask 5, provided with a window 7 of hardened glass, and having adjustable elastic straps 6 which engage around, and press the rim of the mask 5 tightly against, the hood 2, also carries a fresh air valve 8 and a breathing regulator 9 connected by a pipe 10 to an air, or oxygen, container. Ear pads 12, of pourous sponge rubber, are attached to the corresponding inside portions of the hood 2 to form cavities 13 which communicate, through openings 14 in the pads 12, with the auditory canals 11 of the ears, and through offset openings 15 in the outer walls of the cavities with pipes 16, 26. The latter engage respectively with their outer ends with tubings 17, 25 of a valve housing 18 which is inserted through the upper rim of the mask 5. The tubings 17, 25 are continued by passages 19, 24 which are controlled by a disc valve 20 and lead to the space within the mask, the valve disc 20 being mounted on a stem 21 carrying an operating knob 23 which is urged outward by a spring 20 so that the valve 20 closes the passages 19, 24. When it is desired, e.g. during diving, to relieve the inconvenience from the ears, owing to the development of a comparatively low air pressure on the inside of the pads 12, the diver can press the knob 23 so that air, or gas, flows from the mask 5 into the cavities 13. Should the air pressure within the hood tend to become excessively high and the valve, at the time, is unseated, then air escapes through the porous pads 12 and passes along the inside of the hood and through an outlet 4 at the back. Emergency inflation of the suit can be obtained by leaving the valve 18 open. In a modification, the pipes 16, 26 are connected to a flexible expansion vessel instead of to the valve 18 thus by opening a valve in the expansion vessel equalization of pressure can be obtained in the auditory canals. In a further modification the pipes 16, 26 are connected through a control valve to the compressed air, or gas supply. The pipes 16, 26 may be made of pliant material so that even if they are torn from the valve 18 they become compressed under the influence of the outer pressure. The valve 18, may be made to respond automatically to the pressure in the mask 5 or in the gas source. The suit is also intended for use in abnormal atmospheric pressures.
Patent GB-1135669-A (GB)
Title: Process for printing textile materials of natural or regenerated cellulose with reactive dyestuffs
IPC: C09B62/006
Filed: 1966-04-18
Abstract: 1,135,669. Printing cellulosic material with reactive dyes. FARBWERKE HOECHST A.G. 18 April, 1966 [17 April, 1965], No. 16909/66. Heading D1B. The invention comprises a process for printing textile materials of natural or regenerated cellulose with reactive dyestuffs (e.g. of azo or anthraquinone series containing one or more reactive groups) wherein the reactive dyestuff is printed onto the cellulose admixed with water and a thickening agent, dried, and then added with an aqueous solution of an alkali e.g. sodium hydroxide and subsequently exposed to air e.g. for 1 to 5 minutes. The padding solution preferably has a pH of 13 to 14 and neutral or weakly alkaline thickening agents are used in the print paste e.g. alginates, gums, and alkyl celluloses.
Patent GB-439504-A (GB)
Title: Counterbalance for suspended electric lamps and other objects
IPC: F21V21/18
Filed: 1934-06-08
Abstract: 439,504. Spring-drum apparatus for adjustable suspension. RIESS, C. A., 99, Aldwych, London. June 8, 1934, No. 16972. [Class 78 (ii)] [See also Group XXXVI] In order that a counterbalancing device may be installed in any existing fitting without dis. mantling the device or the fitting, a spring-drum 1 is mounted in a supporting bracket 2, and is provided with means, such as an open channel 8 in one of the cheeks of the drum, or an attachment such as a hook on the curved surface of the drum, for engagement with the suspensory cord 5. Open guides 3, 4 provided at the ends of the bracket engage the cord 5 on opposite sides and act as a braking device. An auxiliary braking force is produced by adjusting the wing nut 9 on the spindle 6 to vary the pressure between the drum and the back plate 14.
Patent GB-576610-A (GB)
Title: Improvements in or relating to multi-speed gears
IPC: B62M11/14
Filed: 1944-09-06
Abstract: 576,610. Variable-speed gearing. BIRMING- HAM SMALL ARMS CO., Ltd., and NEEDHAM, V. E. Sept. 6, 1944, No. 16991. [Class 80 (ii)] A three speed gear, particularly for cycle hubs, comprises a simple epicyclic train which is moved bodily in an axial direction to effect speed ratio changes. Planet pinions 33 in a cage 31 mesh with a long sun pinion 3 cut in a solid fixed axle 1. Dogs 37, 39, on the cage 31 engage dogs 15, 29, respectively, on the driving member 7 and driven hub 21 when the gear train is in its end positions. In the normal speed position shown, long dogs 65 on the toothed annulus 35 engage the dogs 15 and also dogs 23 on the hub 21. Movement of the train to the right to engage dogs 15, 37, and disengage dogs 15, 65, give an overdrive, whilst movement of the train to the left to engage dogs 29, 39, give a low speed ratio. The gear. train is actuated by a rod 59 carrying a cross-pin 49 engaging a sleeve 45, movement of the rod 59 to the right being transmitted through a spring 47 to a sleeve 43 connected to the cage 31. In the other direction the movement is effected by a spring 55.
Patent GB-580794-A (GB)
Title: Improvements in and relating to fusion welding
IPC: B23K33/00
Filed: 1944-09-06
Abstract: 580,794. Uniting by fusion. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 6, 1944, No. 17014. Convention date, Sept. 13, 1943. [Class 83 (iv)] In a method of fusion welding, particularly of parts of magnesium, aluminium or their alloys which are readily oxidisable to form over the molten portion a refractory oxide skin, the parts which have or are bevelled on their upper sides to obtain contacting joining edges about #" thick, have the contacting edges smoothed and the lower halves thereof bevelled so that they are separated from one another by an amount sufficient to permit the edge portions of the parts at the joining edges, when fused, to drop down to form a reinforcement along the bottom edges without coming into contact with each other, heat being applied to the top surface of the edge portions to melt them and form a gap between the parts which is then filled with molten metal to complete the weld. Complete fusion at the bottom of the weld is thus obtained without excessive dropping down of the molten edges. Edges of about #" thick have contacting portions 20 and bevelled lower portions 21, the widest parts of which may be about 0.005-0.025" apart or the bevel may be up to an angle of 90 degrees. When thicker parts are being welded, the upper portion is first bevelled to bring down the thickness to about #" and the upper bevelled portion, after welding the other portion as previously described, is filled with weld metal in a series of passes. Welding may be effected by flame or by the electric arc, in the latter case in an atmosphere of helium or argon as described in Specifications 273,297 and 273,705, [both in Class 83 (iv)]. A tungsten electrode 10 surrounded by a gas chamber and a nozzle arranged at an angle of at least 60 degrees with respect to the electrode and through which a filler metal rod 17 of the same metal as the work is fed, are traversed along the line of weld. Welding of a #" sheet of an alloy containing 6 per cent of aluminium, 0.7 per cent of zinc, 0.2 per cent of manganese and the rest magnesium, may be effected with a 65 amp. current at 16¢ volts at a rate of 13" per minute. The parts may be held on supports 22, 23 with their bottom edges unsupported or arranged over a grooved backing member such as of stainless steel with a wide groove.
Patent GB-583980-A (GB)
Title: Improvements in electric soldering irons
IPC: B23K3/03
Filed: 1944-09-06
Abstract: 583,980. Electric soldering - irons. RUNBAKEN, J. H. Sept. 6, 1944, No. 17053. Drawings to Specification. [Class 39 (iii)] An electric soldering-iron comprises an indicating lamp mounted in a recess in the handle and protected by a screwed translucent cover. The lamp being in series with the element acts as a fuse when an internal short circuit occurs. Specification 562,661 is referred to.