baber/WOPTO huggingface dataset:
Patent GB-1101008-A (GB)
Title: Improvements in or relating to the preparation of spinnable solutions of poly acrylonitrile or copolymers having a high acrylonitrile content
IPC: C08G18/10
Filed: 1965-05-17
Abstract: A spinnable solution of polyacrylonitrile or a copolymer having an acrylonitrile content higher than 85% by weight and a molecular weight of from 60,000 to 65,000 is produced by a process comprising direct preparation of the polymer or copolymer solution starting from a mass comprising acrylonitrile in dimethyl formamide, preferably in association with other monomers, e.g. methyl methacrylate and sodium allyl sulphonate, characterized by starting, at a temperature of from 60 DEG  to 65 DEG  C. the polymerization of a mass containing at least 50% monomer(s) and stopping said process when from 30 to 40% of said monomer(s) has been converted. Terpolymers of acrylonitrile, sodium allyl sulphonate and methyl methacrylate, ethyl acrylate or methyl acrylate are prepared in the examples, using lauroyl peroxide as catalyst and thiourea dioxide as modifier.
Patent GB-573360-A (GB)
Title: Improvements in loading or excavating devices
IPC: E02F3/34
Filed: 1943-12-13
Abstract: 573,360. Load-handling machines. PAINTER, G. A., and KENNEDY, D. S.. Dec. 13, 1943, No. 20825. [Class 78 (iii)] A loading device for agricultural purposes comprises a fork which is hinged to the free end of a jib projecting from and pivoted to a frame which is secured to a tractor. The frame, which is detachable, comprises two vertical legs a and cross-members b bolted to the front of the tractor. Two rails c, which support the winding drum h, extend horizontally over the tractor from the legs a to a pair of uprights d bolted to the tractor. The drum h is driven by friction wheels i from the shaft of a pulley e which is connected by a belt f to the power take-off pulley g of the tractor. The jib o comprises a pair of angle-section members tied together by cross-bracing and pivoted to the lower member b. The free end of the jib carries a vertical member g and a transverse bar s. The member q is supported by struts r and carries a pivoted spring catch u which engages the vertical portion t of the fork t<1>. This fork is pivoted on the rod s and may be connected by a pair of chains, which include strong coiled springs, to the member g. A rope w extends from the tail of the catch over a sheave mounted at the top of pillars m to a position near the driver. The pillars m are hinged to the frame at m<1> and are supported by stays y which extend to the drawbar of the tractor. The rope w may be passed round a sheave x which is slidably mounted on the stays y. The luffing rope k passes from the drum h around sheaves l on the pillars m and sheaves n on the jib to an anchorage p. The load may be balanced by weights z on an extension of the draw-bar. In operation the fork in the position shown is thrust into a heap of manure and the winding gear actuated to raise the jib. The tractor is then backed away from the heap with a load contained in the angle between the parts t, t<1>. The load is deposited by pulling the rope w.
Patent GB-243099-A (GB)
Title: Improvements in and relating to devices, such as cards, suitable for recording statistical data
IPC: G06K19/02
Filed: 1924-09-04
Abstract: 243,099. Brougham, L. E., and Accounting & Tabulating Corporation of Great Britain, Ltd. Sept. 4, 1924. Perforating.-In a card or sheet to receive perforations for statistical purposes the portion of card at each perforation position is differentiated from the body of the card a so as to render the portion readily removable. This differentiation may be secured (1) by surrounding each perforation position by a circle, polygon, or square of holes or slots or indentations c, (2) by forming the card of several layers of material of which one is a continuous layer of tissue paper and the others are layers perforated at all the perforation positions, or (3) by treating the card with a wax size or unsaponifiable oil wax except at the perforation positions, each perforation necessary being finally made by sulphuric acid or a caustic alkali respectively.
Patent GB-767810-A (GB)
Title: Improved process for the treatment of cotton products to improve their tensile strength
IPC: D06M13/332
Filed: 1954-07-19
Abstract: Yarns, threads, cords, fabrics or loose fibres formed of cotton are impregnated with one of the following: 3 - isopropoxypropylamine, 3 - methoxypropylamine, 3 - 31 - iminobispropylamine, 3 - dimethylaminopropylamine or 3 - isopropylaminopropylamine in liquid phase (including aqueous solution) at normal temperature and pressure.  The material may be immersed for a period in the liquid amine in an open vessel or sprayed with the liquid and left for a period, and then may be washed in water and dried.  The treatment improves the tensile strength and elongation of the materials. Specification 767,811 is referred to.
Patent GB-205911-A (GB)
Title: A new or improved form of trailer for mechanical transport
IPC: B62D13/06
Filed: 1922-08-01
Abstract: 205,911. Watson, G. W., and Hingston, W. H. Aug. 1, 1922. Compound or articulated road vehicles.-A six-wheeled vehicle comprises a four-wheeled tractor unit and a two-wheeled trailer unit pivotally connected to the tractor unit, the body being supported from both units by turntables and pivotal connections while a longitudinally slidable connection to one unit is also provided. The two units are connected so that the wheels track more or less accurately and spring devices are provided to check and limit lateral oscillations. The body 8 is mounted upon the four wheeled tractor unit 1 by a turntable the lower member of which is connected by transverse pivots 2 to the tractor frame. The rear of the body is similarly mounted upon the trailer 10 but in addition a sliding connection allowing lateral tilting is also provided between the upper member of the turntable and the body. This connection consists of a bar 25 mounted in brackets 24 on the turntable and brackets 26 on the body. The tractor and trailer frames are connected by a universal joint 14, arranged at or near the middle point between the axles 27. 28 to ensure tracking of the wheels. The longitudinal sliding connection may be arranged on the forward turntable. To check and limit lateral oscillations, leaf springs 29, Fig. 5, are arranged one on each side of the body 8 so as to bear at or about their middle on rollers 32 carried by brackets projecting sideways from the upper member of the turntable. The lateral stiffening effect of these springs is increased on curves by reason of the rollers then moving closer to the ends of the springs.
Patent GB-659597-A (GB)
Title: Improvements in railway vehicle transitional coupler mechanism
IPC: B61G5/04
Filed: 1949-08-12
Abstract: 659,597. Couplings for railway vehicles. AMERICAN STEEL FOUNDRIES. Aug. 12 1949, No. 21023. Convention date, April 13, 1948. [Class 103(v)] A railway vehicle transitional coupler mechanism comprises automatic and manual coupling means, both usable in a longitudinal direction but lying in different horizontal planes, said automatic coupling means being shiftable in its plane from such position of use to another position and carrying a guard which extends into the plane of the manual coupling means to prevent the automatic coupling means from being moved in its plane into the position of use when the manual coupling means is in use and which renders the manual coupling means inaccessible when the automatic coupling means is in use. Fig. 2 shows a car 2 provided with a transitional coupler according to the invention coupled to a car 3 provided with a manual coupling comprising a hook 10, clevis 14 and shackles 15, 19 adjustable by a right and left hand threaded screw 17. The transitional coupler comprises a coupler 50 the shank 46 of which is pivoted at 52 to the drawbar 54 for lateral movement in the supporting casting 24 the upper wall 26 of which carries an integral manual coupling hook 28. A weighted latch 32, Fig. 3, pivoted about a horizontal pin 35 is provided with a handle 37 for swinging the latch from its normal position shown, where it closes the hook opening 30, to permit passage of the shackle 19. A guard plate 56 on the coupler head 50 prevents simultaneous movement of the manual and automatic coupling means to the operative position.
Patent GB-479347-A (GB)
Title: Improvements in or relating to the production of crimped artificial filaments, fibres and the like
IPC: D02G1/12
Filed: 1936-07-30
Abstract: <PICT:0479347/IV/1> Artificial filaments, fibres, and the like of thermoplastic material are crimped by laying them on each other in a criss-cross manner and in this state softening with a hot aqueous medium, subjecting to mechanical pressure, drying and setting them. The hot aqueous medium is preferably steam at about 135 DEG  C. and at 25 lb. per sq. in., and the mechanical pressure is preferably about \ba1/2\be lb. per sq. in.  Suitable apparatus comprises a chamber 1 in which the filaments are placed criss-cross on a perforated false bottom 2.  A perforated plate 3 is pressed down on to the filaments by means of a screw 4 and the lid 7 screwed down. Steam or hot water is admitted at 10 and drained out at 12; after about 1 hr. the supply is cut off and hot air passed in at 14 and out at 12 until the filaments are dried and set in a crimped condition.
Patent GB-573854-A (GB)
Title: Improvements in and relating to means for drying grain
IPC: F26B17/14
Filed: 1943-12-16
Abstract: 573,854. Drying grain. WOOD, G., and MAHON, J. Dec. 16, 1943, Nos. 21147/43 and 23147/44. [Class 34 (ii)] Apparatus for drying grain comprises a wide rectangular tower a locating a hopper b at its top and, below the hopper, pairs of perforated or reticulated plates f, h, k, m which diverge and converge downwardly in succession, the said plates being disposed above and below a partition o, as shown, which divides the tower into upper drying and lower cooling sections. The lower walls c of the hopper, converge to a narrow slot d, of a width substantially the full width of the hopper through which grain is permitted by a plate valve e to flow by gravity over the perforated drying and cooling plates, and through gaps g or slots j at the bottom ends thereof, to a discharge slot x and conveyer 12. Simultaneously hot air is drawn upwardly through the plates k, h, f, from a duct s which leads into the space q above the partition o to outlets u at the top of the tower, and cold air through the plates m and the space p below the partition o to a duct r. A series of vertical baffle plates n coact with each perforated plate and are so spaced relatively thereto as to permit passage of grain between their lower edges and the plate but prevent cascading of the grain over their upper edges. Discharge of the grain from the tower is controlled by a reciprocable ladder-like member, not shown, which is interposed between the outlet slot x and an obturator y of box-like form located above the latter, the sides of said member and the spaces between its rungs extending beyond the sides of the obturator. In a modified construction the dryer consists of two spaced and parallel perforated plates which extend downwardly at about 45‹ from two slots at the bottom of the hopper and are disposed between similarly inclined and spaced upper and lower walls of a casing. Specification 558,507 is referred to.
Patent GB-769445-A (GB)
Title: Improvements in or relating to transistor circuits
IPC: H02M3/338
Filed: 1954-07-21
Abstract: 769,445. Rectifying. PHILIPS ELECTRICAL INDUSTRIES, Ltd. July 21, 1954 [July 22, 1953; April 12, 1954], No. 21263/54. Class 38 (2). [Also in Group XL (c)] In a relaxation oscillator employing a junction transistor, the primary of a feedback transformer is arranged in the collector circuit whilst the secondary is connected between the emitter and base. Whilst appreciable collector current flows during the forward stroke the emittercollector voltage is small and during the short fly-back time this current is interrupted whilst the collector voltage exceeds the supply. The circuit is described with respect to an oscillator, Fig. 1, feeding a rectifier 6 connected to a load 7 shunted by a capacitor 8, although a tertiary winding may be employed. As the collector current through inductor builds up, a voltage appears in the secondary of transformer 2 which maintains a base current in the transistor 1 through resistor 3. The collector current continues to increase until the knee of the collector voltage/collector current curve for the appropriate base current is reached. The feedback voltage then ceases and the transistor is cut off, the collector voltage falling to a large negative value. The product of supply voltage and mean current substantially exceeds the rated dissipation of the transistor. In a modification, Fig. 8, a resistor 18 decoupled by capacitor 17 is employed having a value many times greater than the input resistance existing between base and emitter so that the effect of the fall in the latter with rising supply voltage B is minimised thereby reducing the variation in voltage across the load 7. A further resistor may be connected from resistor 18 to the emitter to alter the bias on the base. A rectifier may be used with, or in place of resistor 3. The resistor 3 may be arranged in the base circuit, Fig. 5 (not shown). A resistor-capacitor circuit 9, Fig. 6, may be arranged in the base circuit on the side of the secondary remote from the base so that, the current in the load 7 also passes through it. An increase in load current causes an increase in base current and thus of collector current which tends to offset the fall in voltage across load 7. In a further modification, Fig. 9 (not shown) a tertiary winding in series with a diode is connected across the supply B to limit the pulse output fed to the rectifier 6 Gas discharge tube circuit. A discharge tube 33, Fig. 11, may be operated from the transistor 1 and transformer 2 during part of a cycle of the supply mains B<SP>1</SP>. The base may be biased by filter 3, 34 having a time constant corresponding to the periodicity of the supply. Supply circuit for hearing aid. When the output of the oscillator, Fig. 12, is rectified to supply positive bias for the electrodes of a hearing aid, Fig. 12, a resistor 40 may be arranged in series with the capacitor 39 to provide negative grid bias.
Patent GB-984427-A (GB)
Title: Electron discharge devices
IPC: H01J23/027
Filed: 1961-06-13
Abstract: 984,427. Velocity-modulated tubes. SPERRY RAND CORPORATION. June 13, 1961 [June 17, 1960], No. 21290/61. Heading H1D. In a klystron or travelling-wave tube the collector electrode is operated at a relatively low potential and a thin apertured gridless disc having an axial thickness no greater than twotenths of the axial separation between a member at the end of the interaction region, which is biased positively relative to the collector electrode, and the collector electrode, is disposed in front of the collector electrode and operated at cathode potential, to establish a potential minimum which acts to suppress secondary electrons from the collector. The potential minimum is above cathode potential to avoid the blocking of the primary beam and is at least 30 volts below the potential of the collector electrode. The thin apertured disc may be supported by ceramic envelope rings. In the klystron shown the thin apertured disc 46 is supported by the insulating tube 47. The internal polepieces 41, 42 form the bounding electrodes of the interaction structure 33, 34. The precise aperture diameter and axial position of the disc 46 may be determined by use of an electrolytic tank or from curves given in the Specification. Two or more discs 46 may be provided and the facing surfaces of electrodes 42, 43 may approximate cylindrical or spherical surfaces to co-operate with converging or diverging beams.
Patent GB-184690-A (GB)
Title: Improvements in flying machines of the flapping wing type
IPC: B64C33/02
Filed: 1921-08-11
Abstract: 184,690. Piering, O. Aug. 11, 1921. Ornithopters; propelling.-A fixed supporting- plane a, which may be pentagonal, is arranged above a pair of quadrangular concavo-convex flapping wings b, which are operated by handles d, have a dipping-motion of their forward edges during the down-stroke, and are turned by the feet into a position of reduced resistance on the up-stroke. The frame m carrying the foot-plate r is hinged to the frame e carrying the seat, and the wings b are hinged to the frame m by a universal joint at one part, and a link k between two universal joints at another part, so that the forward edges dip when the wings are pulled down by the handles d.
Patent GB-240423-A (GB)
Title: Improvements in or relating to protective systems for thermionic valves
IPC: H03F1/54
Filed: 1925-08-26
Abstract: 240,423. Westinghouse Electric & Manufacturing Co., (Assignees of Davis, R. L.). Sept. 23, 1924, [Convention date]. Thermionic generators and modulating systems. -Thermionic valve systems having their respective filaments connected in series are provided with protective devices arranged to substitute automatically an equivalent resistance for any filament that fails to pass the heating-current. Automatic control of the plate supply current is also provided. The filaments of the valves 1 - - 4 are connected in series across the leads 5, 6, and each filament is shunted bv a relay 15 - - 18. When the filaments are intact, these relays do not close their contacts, but on the breakdown of any filament, the corresponding relay is energized and connects an equivalent resistance 19 - - 22 across the broken filament. When once attracted, the contacts remain closed. The plate supply of the valves is controlled bv a relay 30, the circuit of which includes the back contacts of relays 17, 18 in parallel, back contacts of relays 15, 16 in parallel, and contacts controlled by a voltage relay 10 and a current relay 7, respectively in shunt and in series with the filament supply 5, 6. The relays 10, 7 open the plate circuit if the filament voltage, or filament current,.are below normal; and the back contacts of the relays 15 - - 18 open the plate circuit if the filaments of valves 1, 2 fail simultaneously, or if valves 3, 4 fail simulaneously. When the group of valves 1, 2 is used for modulating the output from a group of oscillator valves 3, 4, the system can operate so long as one of the modulators and one of the oscillators are intact, and the plate current is cut off only when both or all the valves of one group are out of action. Filament current may be supplied by a motor generator set, and on starting, the application of plate potential is delayed by the relays 7, 10 until filament voltage and current have built up to their normal values.
Patent GB-874465-A (GB)
Title: Improvements in or relating to automatic or semi-automatic switching systems
Inventor: GALVIN JOHN LESLIE
IPC: H04Q1/446
Filed: 1959-06-23
Abstract: 874,465. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. May 31, 1960 [June 23, 1959], No. 21400/59. Drawings to Specification. Class 40 (4). In a system employing V.F. signals of a single frequency for the setting up, control and supervision of calls over junctions, the same signal is used to indicate answering and clearing by the called subscriber and is repeated until an appropriate acknowledgment signal is received, such signals differing in duration in the two cases. To this end, once the connection has been set up, the outgoing and incoming relay sets are arranged to assume two conditions alternately. In the first condition, the outgoing relay set in response to the answering signal sends forward a signal of short duration to prevent the repetition of the answering signal, whereas in the second condition in response to the clearing signal it sends forward a signal of longer duration to prevent the repetition. If in either case the acknowledgment signal fails to reach the incoming relay set, the repeat of the backward signal will be misinterpreted at the outgoing relay set and will give rise to the wrong acknowledgment signal, so that a second repeat is necessary to bring the two relay sets into step again.
Patent GB-580250-A (GB)
Title: The production of synthetic resin compositions of improved physical and chemical properties
Filed: 1943-12-22
Abstract: A monomer, the polymer of which is not substantially attacked by alkalis, is copolymerized with two to twenty per cent by weight of a monomer having an acid (or acid derivative) group per molecule, and the copolymer then treated with a solution of one or more alkalis in water, methanol, ethanol or mixtures.  The acid derivative group is one which may be converted by alkalis to salts.  Specified monomers, the polymers of which are not attacked by alkalis, are methyl methacrylate, methyl acrylate, n-butyl methacrylate and styrene. Acidic monomers are itaconic, aconitic, citraconic, acrylic and methacrylic acids and unsaturated half-esters of dibasic acids such as monoethyl fumarate and monoalkylsuccinate, maleic and methacrylic anhydrides, methacrylyl-chloride or nitrile.  Suitable alkalis are hydroxides of alkali metals or alkaline earth metals, salts of the alkaline metal hydroxides and weak acids such as carbonic and silicic acids, and nitrogenous bases such as ammonia, piperidine, and methylamine.  Synthetic resins, plasticisers such as dibutyl phthalate and tricresyl phosphate, fillers, catalysts such as benzoyl and acetyl peroxides and benzoin, inhibitors, dyes and pigments may be added before polymerization.  Dyes or leuco bases may be incorporated in the alkali solution.  Specified dyes are "Solacet Fast Blue," "Solacet Fast Orange" and "Solacet Fast Red."  Such dyes may be used with or without Glauber's salt, wetting agents or other dyeing acids, or the alkali bath may contain a developer for diazo dyes such as pyrogallol, beta-naphthol, resorcinol, phenol or phenylenediamine, and after alkali treatment the copolymer may be dyed by immersion in a solution of a diazo salt.  The dyed resins may be after-treated with steam or metallic salt solutions.  Articles prepared by this invention may be treated with alkali-resistant agents to form a pattern on their surfaces prior to alkali treatment. Such an alkali-resistant agent is a solution of polystyrene in carbon tetrachloride.  In examples: (1) a methyl methacrylatemethacrylic acid copolymer was prepared in sheet form using benzoyl peroxide as catalyst.  The sheet was after-treated with caustic soda; (2) a sheet prepared as in (1) was treated with a solution of nickel sulphate to give a green colour; (3) and with mercuric nitrate to give a sheet opaque to X-rays; (4) the same copolymer before alkali treatment was immersed in a Rhodamine dye - potassium hydroxide aqueous solution; (5) "Diakon A" (R.T.M.), methyl methacrylate and methacrylic acid were mixed and polymerized and then immersed in a solution of caustic soda, Glauber's salt and Solacet Fast Red dye.  Specifications 427,494 and 450,305 are referred to.