baber/WOPTO huggingface dataset:
Patent GB-638331-A (GB)
Title: Solutions of polyacrylonitrile
IPC: C08J3/09
Filed: 1948-01-16
Abstract: Polymers of acrylonitrile and copolymers of acrylonitrile with other polymerizable substances, particularly vinyl or acrylic compounds, in which at least 85 per cent by weight of the copolymer is acrylonitrile, are dissolved in an organic compound having 4 or 5 atoms linked together to form a single ring structure, the components linked together to form said ring structure being selected from the group consisting of <FORM:0638331/IV (a)/1> , and -CH : CH-, and being further selected so that the components present in said structure include at least one -O- and at least one <FORM:0638331/IV (a)/2> ; these two components being preferably adjacent so as to form the grouping <FORM:0638331/IV (a)/3> Examples of suitable solvents are b -propiolactone, g -butyrolactone, methylene glycollate, anhydro-carboxy-glycollic acid, succinic anhydride, maleic anhydride and ethylene carbonate.  More than one of these solvents may be used and there may also be incorporated other known solvents for polyacrylonitrile, such as dimethylformamide, or minor proportions of other materials which are miscible with the solvent, e.g. water, acetone and acetic anhydride.  The solutions of the invention may be formed into films or shaped articles by normal procedures and in particular may be extruded into air at a temperature of 150-155 DEG C. or into an aqueous solution of ethylene glycol at a pressure of 100 lbs. per sq. inch of nitrogen, and the filaments obtained stretched to four times their original lengths after washing thoroughly in running water. Specifications 573,270, 579,887, 583,939, 584,548, 585,368 and 595,043 are referred to.ALSO:Methylene glycollate is obtained by heating glycollic acid with two molecular proportions of paraformaldehyde in benzene at 150 DEG  C., separating the benzene layer and fractionating it to obtain the methylene glycollate; anhydrocarboxy-glycollic acid is prepared by reacting a solution of glycollic acid in dioxane with carbonyl chloride for three days, removing the solvent and heating the residue at 60 DEG C. at a pressure of 20 mm. of mercury for three hours.
Patent GB-346709-A (GB)
Title: Improved means for controlling air pressure in the tyres of motor vehicles
IPC: B60C23/14
Filed: 1930-01-15
Abstract: 346,709. Pneumatic tyres. DANEEL, R. H., Van Zyl Street, Britstown, South Africa. Jan. 15, 1930, No. 1455. [Class 144 (ii).] Relates to means for inflating, and controlling the pressure of, tyres whilst running or stationary, of the kind described in Specifications 300,931, [Class 144 (ii), Wheel tyres, Pneumatic &c.], and 344,109 in which compressed air from a reservoir is fed to the tyres through connections on the wheel hub. Fig. 4 shows the general arrangement of the apparatus comprising a distributer 7 with pipes 9 .. 12 leading to the tyres. The pipes are fitted with manually-operable cocks 13 .. 16 and with adjustable automatic blow-off valves 21 to limit the pressure supplied to the individual tyres. The cocks are provided with main supply ports 17 and with small vents 18 by means of which the communications between the cocks and the tyre valves may be opened to atmosphere through ports 19 when shut off from the distributer 7. A stabilizing chamber 25 fitted with a pressure-gauge 6 communicates with the distributer 7 through a pipe 26 fitted with a non-return valve 27, and through pipe 28, chamber 29, and pipes 31, with ports 30 in the castup of the main cocks. In the movement of the latter from one terminal position to another, the tyres are temporarily placed in communication with the chamber 25 as the ports 18, 31 register. A vent plug 34 is provided to permit leakage from the chamber 25 so that the gauge swings towards zero before opening the chamber 25 to any of the tyres.
Patent GB-1201551-A (GB)
Title: Control device for the rotor of a rotary-wing aircraft
IPC: B64C27/54
Filed: 1968-01-10
Abstract: 1,201,551. Rotorcraft rotors. BOLKOW G.m.b.H. 10 Jan., 1968 [12 Jan., 1967], No. 1503/68. Heading B7W. A control device for a rotororaft rotor with blades 2, 3, 4 pivoted for lead-lag movement and designed that their frequency of pendulum swing about the lead-lag pivot due to centrifugal force is equal to the rotational frequency of the rotor, comprises an aerodynamic brake 27 mounted in the tip of each rotor blade rendered effective over a sector α of blade movement, the bisector M of which sector is at right angles to the normal forward direction of flight, the sector being one in which the blades move forwardly with respect to the rotorcraft. The brake may comprise a spoiler 27 extended from the blade tip, having a width almost equal to the blade thickness. In one form the spoiler 27 is mounted at one end of a lever pivoting about a vertical axis 24 and held in its effective position by an electromagnet 29. The spoiler 27 may be retracted by a spring (14), Fig. 13 (not shown), when the electromagnet is de-energized. Alternatively the spoiler may be held in its retracted position by another electromagnet 30. When neither electromagnet 29, 30 is energized the spoiler is oscillated to and fro by a link 25 pivoted eccentrically at 21a on a wheel 21 rotated by the airflow q past the end of the blade. An alternative form of spoiler comprises a wheel 21 rotated by the airflow q, the wheel having alternate teeth 22 small, and large, the large teeth being of soft iron, and the blade including two electromagnets positioned to hold one of the retracted large teeth alternately in two positions. In one of these positions a large tooth, is fully extended, acting as a spoiler and in the other position a small tooth is fully extended.
Patent GB-1207866-A (GB)
Title: Differential fluid pressure indicator
Inventor: MOUWEN HERMAN CHARLES
IPC: H01H35/38
Filed: 1968-01-11
Abstract: 1,207,866. Pressure indicator for filter. PUROLATOR Inc. 11 Jan, 1968, No. 1553/68. Heading BID. [Also in Division GIL] In a differential fluid pressure indicator, such as for indicating when a filter needs replacing, the upstream side of the fluid flow to the filter is connected to a high pressure port and the downstream side to a low pressure port 3 and the arrangement is such that any predetermined pressure increase due to increased resistance to fluid flow by the filter causes a piston 5 to move against a spring 9 to cause a magnet 10 carried by the piston 5 to repulse a magnet 11, on the other side of a fluid tight wall 8, to move a button 7 rapidly to a projected signalling position in which the button 7 is held by a cap 19 of magnetic material A disc 22 of magnetic material snaps the button 7 to its non signaling position when the button 7 is depressed. Bimetallic strips may be provided to prevent movement of the button 7 when the fluid is cold.
Patent GB-1084533-A (GB)
Title: Improvements in or relating to lawns, gree ns and playing fields and methods of forming the same
IPC: E01C13/08
Filed: 1965-01-14
Abstract: A lawn, green or playing field is formed by levelling and compacting the soil, providing openings of substantially 5 cms. in width extending from the surface of the soil into a drainage zone and filling the openings with filler material having a large cavity volume, a thin layer of seeds and material for embedding the seeds and permitting them to germinate being applied and retained on the soil.  The embedding material may be stray, hay, turf, sawmill waste or the seeds may be mixed with asphalt emulsion and humus and sprayed on to the soil.ALSO:A lawn, green or playing field is formed by levelling and compacting the soil, providing openings of substantially 5 cms. in width extending from the surface of the soil into a drainage zone and filling the openings with filler material having a large cavity volume, a thin layer of seeds and material for embedding the seeds and permitting them to germinate being applied and retained on the soil.  The embedding material may be straw, hay, turf, sawmill waste or alternatively the seeds may be mixed with asphalt emulsion and humus and sprayed onto the soil.
Patent GB-944122-A (GB)
Title: Device for cutting flexible material
IPC: B65H35/00
Filed: 1960-01-18
Abstract: 944,122. Cutting apparatus. A. L. MICKLEBURGH. Nov. 24, 1960 [Jan. 18, 1960], No. 1735/60. Heading B4B. [Also in Division A4] Corrugated paper or other material 24 held in contact with a table top 2 by means of a removably-mounted rod 17 is cut by means of a blade 9 removably mounted on a carriage 10 traversable along a bar 7. The rod 17 is freely mounted at its ends in vertical guides 18. The material to be cut is drawn from a roll 23 mounted on a removable bar 22.
Patent GB-1125081-A (GB)
Title: Multiplexing system
IPC: G08C15/08
Filed: 1966-01-13
Abstract: 1,125,081. Multiplex pulse signalling. ROSEMOUNT ENG. CO. 13 Jan., 1966 [14 Jan., 1965], No. 1735/66. Heading H4L. In an arrangement for sampling sequentially a plurality of variable resistance sensors 14 &c. such as temperature sensors forming part of bridge circuits 15, 16, 17 &c. and transmitting the samples in time division multiplex over a common line 48 and amplifier 49 initially a semi-conductor switch 53 is closed to connect the input of amplifier 49 to earth potential as a reference and a channel semi -conductor switching device, e.g. 45 also is closed, no output being provided at this time by pulse source 38 so that the bridge circuits are not energised. Any charge on the capacitor 46 at this stage will give a  measure of the error or "offset" voltage. Switch 53 is then opened and a pulse applied to bridge 11 so that a signal pulse is applied to amplifier 49. The remaining channels are scanned in sequence in like manner. The capacitors 46, 58, 62 may be replaced by a single capacitor connected in line 48. In a modification, Fig. 2 (not shown) the output of the amplifier is fed through a capacitor (73) to the output terminal (75) and terminal (75) is connected by an additional switching device (81) synchronized with the switch (77) across the input of the amplifier to the earth terminal. The eliminates errors due to drift within the amplifier.
Patent GB-628007-A (GB)
Title: Improvements in or relating to luxmeters
IPC: G01J1/42
Filed: 1947-01-20
Abstract: 628,007. Electromagnetic ammeters and voltmeters. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Jan. 20, 1947, No. 1756. Convention date, Dec. 1, 1943. [Class 37] [Also in Group XL (b)] A coreless moving coil indicating system is energized by the selenium cell of a luxmeter, a -non-linear (e.g. logarithmic) relation being necessary between the angular coil displacenebt and the quantity of light being measured so that equal percentage differences in illumination are indicated with equal accuracy at each end of the scale, and the decreased cellsensitivity at high illuminations is compensated. In Fig. 1, moving coil 2 is pivoted between pole shoes of a permanent magnet (not shown) which have a thickness b not greater than # of the pole spacing a and preferably <SP>1</SP>/ 10  thereof. Auxiliary pole-pieces 5 are magnetically connected to the pole shoes 2 and are curved to face each other so that the ends 6 lie adjacent to the moving coil. The principal and auxiliary pole shoes are proportioned and positioned to give the required non-linear field distribution for the cell used in the luxmeter and may be energized by different magnets, made of materials of differing reluctance, or the auxiliary polepieces may be narrower than the principal polepieces.
Patent GB-956892-A (GB)
Title: Synthesis of aromatic nitriles
IPC: C07D213/84
Filed: 1963-01-15
Abstract: Mono- or di-nitriles of aromatic or heterocyclic compounds are prepared by treating an alkyl-substituted (but otherwise unsubstituted) aromatic or heterocyclic compound with ammonia in the presence of a catalyst comprising a semiporous refractory solid having a heavy-metal ion capable of forming a Werner ammine complex ionically combined therewith, the reaction being effected at 850-1200 DEG F. at atmospheric, raised or reduced pressure with a contact time between 0.01 sec. and 20 minutes and with the use of at least 2 mols., preferably 10-100 mols., of ammonia per mol. of aromatic or heterocyclic compound. Aromatic or heterocyclic compounds specified as suitable for treatment are toluene, ethylbenzene, diethylbenzenes, xylenes, trimethylbenzenes, methylnaphthalenes, methylanthracenes, methylpyridines, 2, 4- and 2, 5-butidines, methylthiophene, methylfuran, methyloxazole and 2-methylpyrimidine.  The catalyst may be (1) a mineral containing an appropriate heavy metal in its lattice, e.g. cahnite, almandite, siderite or certain spinels, or (2) a mineral into which an appropriate heavy-metal ion has been introduced by base-exchange, a number of minerals being specified in this connection, or (3) a synthetic zeolite or molecular sieve into which the desired heavy metal ion has been incorporated by base-exchange.  A heavy metal is defined as a metal having an atomic number of 23-30, 43-48 or 75-80, all inclusive.  Specified heavy metals are chromium, cobalt, nickel, copper, zinc, palladium, silver and platinum. Examples are given in which (1) toluene and ammonia yield benzonitrile in the presence of an artificial zeolite into which various heavy-metal ions have been introduced by base-exchange and (2) similarly, p-xylene yields p-tolunitrile and a small proportion of terephthalonitrile.ALSO:Catalysts for making di-nitriles comprise a semi-porous refractory solid having a heavy-metal ion capable of forming a Werner ammine complex ionically combined therewith.  The catalyst may be (1) a mineral containing an appropriate heavy metal in its lattice, e.g. cahnite, almandite, siderite or certain spinels, or (2) a mineral into which an appropriate heavy-metal ion has been introduced by base-exchange, a number of minerals being specified in this connection, or (3) a synthetic zeolite or molecular sieve into which the desired heavy metal ion has been incorporated by base-exchange.  A heavy metal is defined as a metal having an atomic number of 23-30, 43-48, or 75-80, all inclusive.  Specified heavy metals are chromium, cobalt, nickel, copper, zinc, palladium, silver, and platinum.  The catalyst may be used alone or on a support and may be activated by heating at a temperature up to 700 DEG C. in vacuo or in a gas.  After use, the catalyst may be regenerated by heating at 1000 DEG F. in an oxygen-containing gas. Examples are given.
Patent GB-441516-A (GB)
Title: Improved process for the manufacture of refractory products from raw materials rich in magnesium orthosilicate, particularly olivine rocks
IPC: C04B35/16
Filed: 1935-01-19
Abstract: Refractory articles of substantially constant volume are made by heating without melting a mixture of powder and granules and/or lumps of impure olivine complying with the following conditions. They contain at least 70 per cent by weight of olivine (corresponding to about 60 per cent of magnesium orthosilicate), from 10 to 30 per cent of other minerals, not more than 10 per cent of iron calculated as Fe O, not more than 10 per cent of magnesium hydrosilicates, not more than 20 per cent of rhombic pyroxene, not more than 10 per cent, preferably not more than 5 per cent of monoclinic pyroxene and not more than 10 per cent, preferably not more than 2 per cent of felspar.  Chromium compounds may be added to the mixture either as fine powder or in solution.  The chromium compounds are preferably such as after being heated to 1000 DEG  C., contain not less than 50 per cent by weight of Cr2O3, e.g. chromite.  The amount of chromium compounds added is such as to give in the finished product from ,3 to 10 per cent of Cr2O3.  Small quantities, e.g. from ,3 to 2 per cent, of very hard substances such as corundum, spinel, or titanium carbide may also be added. Examples are given.  Specifications 340,437, [Group IV], 352,881, and 373,846 are referred to.
Patent GB-163402-A (GB)
Title: Improvements in loose leaf binders
IPC: B42F13/04
Filed: 1920-01-20
Abstract: 163,402. Wycherley, S. R., and Spicer Bros., Ltd. Jan. 20, 1920. Flexible-band files; covers; attaching files to covers. - In a loose-leaf binder of the type in which the leaves are carried by flexible thongs and held between clamping-bars drawn together by winding up the thongs, the covers 1, 2 are hinged directly to telescoping back members 7, 8 which carry the clamping-bars 5, 6, and are provided with side-flanges 12, 13 respectively having a double pin-and-slot connection, the flange 13 being also bent over at 16 to form a guide for the flange 12. The winding-mechanism for the thongs is accommodated in the bar 5, which is provided with a detachable cover. The cover 1 of the binder is hinged to the back through the detachable cover of the bar 5, and the cover 2 through the bar 6 by metal flaps 25 provided with serrated edges, pressed into engagement with the cover, and eye-portions 26 through which pass pins 23 into holes in the bars.
Patent GB-209606-A (GB)
Title: Improvements in electrically driven submersible pump equipments operated by direct current
IPC: H02K5/132
Filed: 1923-01-22
Abstract: 209,606. Constable, A. D., and Fletcher, F. P. Jan. 22, 1923. Pumping machines and apparatus. - An electrically-driven submersible pump suitable for dealing with flooded compartments in a ship comprises a direct-current motor of vertical pattern enclosed in a casing adapted to be supplied with air under pressure and having within the casing associated therewith an air-cooler comprising pipes through which water is circulated when the pump is in operation. The pump a of the centrifugal type is coupled to a motor g controlled by a flood-switch in the compartment and by a controller at an elevated position. A motor-driven blower is also arranged in an elevated position and delivers air to the motor casing h through an inlet o and also if desired to the casing of the controller. The blower is arranged to be started at the same time as the pump. The casing h is divided by a flange joint i and the upper part is provided with inspection-windows j. The lower part is provided with cooling-pipes k surrounding the motor and connected to delivery and discharge pipes l, connected in turn by pipes l<2> to the delivery and suction of the pump a. The heated air from the motor is circulated by a fan m.
Patent GB-756972-A (GB)
Title: Information recording and reproduction apparatus
Inventor: HAMBURGER GERHART LOTHAR
IPC: G11B15/20
Filed: 1954-01-21
Abstract: 756,972. Magnetic recording and reproducing apparatus. HARTLEY ELECTROMOTIVES, Ltd. Jan. 21, 1955 [Jan. 21, 1954], No. 1896/54. Class 40(2) In a recording and reproducing having means for stopping reproduction and the movement of the record, means are operable in conjunction with the stop means to record on the medium a recording representative of the point at which reproduction stopped, and means are also operable by start means to scan the said recording and cause the reproduction to begin again at the point where reproduction was stopped. The high enertias normally required to ensure constant speed in a record apparatus cause the record to overshoot the transducer when stopping and thereby lose that part of the recording, and when re-starting to fail to reproduce properly a further portion of the recording while the record medium is attaining the correct velocity. The present invention is designed to avoid these deficiencies by coupling the drive capstan 18 through a differential gear with a drum 16 two sets of four magnetic transducers 20A, 20B, 20C, 20D and 21A, 21B, 21C, 21D, respectively, one set of which is superposed over the other and correspond to two different tracks on the tape 13. The cage 24 of the differential gear is driven by a motor 23, and during reproduction a brake 28 holds drum 16 stationary while capstan 18 draws the tape 13 over the drum 16. The signals on the tape are reproduced by the leading transducer, corresponding to transducer 20A in Fig. 2. When the reproduction is stopped by means not shown the circuit of the transducer 20A is broken, the brake 28 released, a brake 29 applied, and a constant frequency control signal applied to transducer 21A. The position on the tape at which reproduction ceased overshoots the position of the transducers 20A, 21A before coming to a standstill, but as the drum started to rotate counterclockwise at the instant reproduction ceased, the correct relative speed between tape and drum is maintained. Furthermore, at the same position on the tape that reproduction ceased the control signal recording was commenced on the tape corresponding to that position. When the apparatus is again switched for reproduction, the brake 29 is released, the brake 28 applied, and the transducer 21 corresponding to transducer 21B in Fig. 2 is switched in and when it reaches the position in which the control signal starts, the transducer 20 corresponding to transducer 20B is switched, by means not shown, to reproduce. By the time the drum 16 becomes stationary, the transducer 20B has come to rest in the position of transducer 20A in Fig. 2. The apparatus has been designed largely for purposes in which frequent interruptions of short duration take place, and a particular application described is that in which an automatic typewriter receives data and pauses are required and automatically initiated at the end of each line for sufficient time to enable the carriage of the typewriter to be returned to initial position.
Patent GB-107756-A (GB)
Title: Improvements in and relating to Belt Shifting Devices.
IPC: F16H7/22
Filed: 1917-02-08
Abstract: 107,756. Fortuna - Werke Spezialmaschinenfabrik Ges. July 3, 1916, [Convention date]. Bands, placing on and throwing off pulleys; tension arrangements. - In belt-fork operating gear for shifting belts on stepped pulleys, the belt fork d' slides on a stationary tube a and carries a guidepiece e passing through a slot in the tube and engaged by a belt, cord, &c. passing over pulleys h, i, k within the tube. A second fork p has a boss s turning loosely within the boss c' of the fork d' and carries a tension roller g which is kept constantly in position by a weighted arm t on the boss s.
Patent GB-589975-A (GB)
Title: Improvements in and relating to the treatment of stockings and other knitted articles
IPC: D06M23/14
Filed: 1945-01-26
Abstract: <PICT:0589975/IV/1> In a method of treating stockings and other knitted articles made of nylon or a similar polyamide resin, in which the articles are carried on forms by an endless conveyer through a pre-boarding chamber in which they are subjected to the action of live steam and hot air heated by means other than the steam, the articles, after having been placed on the forms and prior to their entry into the pre-boarding chamber, or on leaving same and whilst still on the forms, are impregnated with a delustring or filling compound or with a known "anti-snag" compound.  The apparatus described in Specifications 589,967 or 589,973 may be used, and the compound may be sprayed, prior to entering the pre-boarding chamber 16, in box 12 or box 14, or in both.  Alternatively, the forms are passed between a pair of rollers, down the nip of which flows a stream of the compound, as described in Specification 482,522. Specification 458,550, [Group VIII], also is referred to.