baber/WOPTO huggingface dataset:
Patent GB-1138426-A (GB)
Title: Purification of formaldehyde
IPC: C07C47/04
Filed: 1967-04-11
Abstract: 1,138,426. Formaldehyde purification. E. I. DU PONT DE NEMOURS & CO. 11 April, 1967 [16 Nov., 1966], No. 16630/67. Heading C2C. Water is removed from a formaldehyde/water mixture by contact with a liquid extractant for water which is (a) a molten mixture of alkali metal salts of organic acids (including thiocyanic acid), the salts having a melting point below 120‹ C., or (b) a solution of at least 70% by wt. of one or more alkali metal salts of an organic acid in a polar solvent. Specified extractants of the type (a) are molten eutectic mixtures of NaCNS/KCNS and KCNS/K formate. Specified extractants of the type (b) are aqueous, dimethyl sulphoxide, dimethylformamide and ethylene glycol solutions of Li, K and Na salts of ethylenediamine tetraacetic acid, Li and K formates and K glycolate and K diglycolate. The water-extraction process may be combined with a process wherein aqueous formaldehyde is reacted with an alcohol to form a hemiformal, with subsequent removal of water and pyrolysis of the hemiformal. In such instances, an alcohol is added to the formaldehyde before, after or during removal of the water with the liquid extractant. It is preferred to contact the aqueous formaldehyde with the alcohol and liquid extractant simultaneously. The alcohol may be used in admixture with an inert solvent for formaldehyde, e.g. a hydrocarbon, to reduce the solubility of the extractant in the alcohol and facilitate removal by the extractant of other formaldehyde impurities, e.g. formic acid and methanol. The liquid extractant can be regenerated by heating to evaporate the water absorbed therein.
Patent GB-586767-A (GB)
Title: The coating of surfaces with polythene compositions
IPC: B05D7/26
Filed: 1944-09-01
Abstract: Polythene compositions are bonded to surfaces by a process comprising the steps of coating the surfaces with an adherent layer of a solid polyalkylene sulphide composition (see Group IV) which contains at least 40 per cent, by weight of polyalkylene sulphide and covering this with a film of polythene composition. The polyalkylene sulphide composition may be sprayed from a flame gun; applied in the solid state and then fused; or deposited from a solvent and fused.  Best results are obtained when the polyalkylene sulphide composition contains 30-50 per cent. by weight of polythene.  The polythene composition is preferably applied by spraying in a fused state and when the polyalkylene sulphide composition is in a semi-plastic condition.  This may be done in patches which are allowed to shrink before adjoining patches are applied.  Interior surfaces of tubes are preferably coated with polythene composition after the polyalkylene sulphide has cooled to a non-tacky state.  The polythene composition may also be applied dissolved in hydrocarbon or chlorinated hydrocarbon solvents which are then evaporated.  Alternatively the polythene composition may be in the form of a paste-like dispersion by dispersing the polythene, in powder form, in a solution of one or more film forming materials in a volatile liquid, which liquid is subsequently evaporated.  In an example "Alkathene" (Registered Trade Mark) is sprayed by a Schori gun on to a mixture of "Thiokol" (Registered Trade Mark) and "Alkathene."  Specifications 527,467, 551,339, 579,769, [Group IV], and 585,395 are referred to.ALSO:Polythene compositions are bonded to surfaces by a process comprising the steps of coating the surfaces with an adherent layer of a solid polyalkylene sulphide composition, which contains at least 40 per cent by weight of polyalkylene sulphide, and covering this with a film of polythene composition.  The coatings may be applied in several ways, such as by spraying or depositing from a solvent (see Group III).  Included in the polythene compositions may be dyes, pigments, fillers or modifiers, such as wax and polyisobutylene.  The polyalkylene sulphides can be prepared, for example, by interaction of ethylene dichloride, dichloroethyl ether or dichloroethyl formal with alkali polysulphides.  Best results are obtained when the polyalkylene sulphide compositions contain from 30-50 per cent by weight of polythene.  Specifications 527,467, 551,339, [both in Group III], 579,769 and 585,395, [Group III], are referred to.
Patent GB-402001-A (GB)
Title: Improvements in packings for rotary shafts and the like
IPC: F16J15/447
Filed: 1933-06-10
Abstract: 402,001. Stuffing-box substitutes. PULVIS AKT.-GES., Glarus, Switzerland. June 10, 1933, No. 16682. Convention date, June 23, 1932. [Class 122 (v).] A shaft packing, applicable to slip couplings employing granular material, comprises a series of conical chambers 5, 17, 26 arranged with their apices directed away from the pressure chamber 4 and communicating through labyrinth passages 8, 22 and arcuate orifices 15, 25 in the baffles 9, 23. Rotary elements 6, 10 mounted in the chambers, carry blades 7, 18 whereby any leakage is projected radially and is returned, due to centrifugal force and the conicity of the said chamber, through the orifices 15 into the pressure chamber. Leakage from the last chamber 26 is prevented by the conicity of the passage 27 and of a throwing ring 28.
Patent GB-145500-A (GB)
Title: Improvements in and connected with radiator shutters for internal combustion engines
IPC: B01D19/00
Filed: 1920-06-21
Abstract: 145,500. Daimler-Motoren-Ges. Feb. 16, 1916, [Convention date]. Radiators, aircraft, motor-car, &c.-Relates to screens for controlling the flow of air through radiators, and consists in a roll-up flexible screen fixed at one end and mounted on a free roller at the other end, so that the screen may be wound up or unwound by moving the roller bodily across the front face of the radiator, thereby avoiding the resistance to movement of the screen due to air pressure. Two similar screens b, b<1>, Fig. 1, are secured at their outer ends b<2>, b<3>, to rigid parts, and are mounted at their inner ends on spindles c, c', which are guided in slots d, d<1>, Fig. 2, and are fitted with pinions f, f<1> engaging racks g, g<1> set at an inclination towards the centre of the radiator. The spindles may be moved along the racks and guides by means of an endless cord or wire h passing over guide pulleys i, i<1>, i<2>, and through eyelets on the spindles. The cord is guided over a straight or curved rack k, Figs. 4 and 5, within reach of the driver, and may be held in any adjusted position by means of a lug n on a spring pin p fitted with a handle o to which the cord is secured. The screen may be composed of wood veneer strips on a fabric backing.
Patent GB-699931-A (GB)
Title: Improvements in or relating to mounting for stencil screen
IPC: B41L13/04
Filed: 1951-07-16
Abstract: <PICT:0699931/III/1> A coating machine comprises a hollow rotatable drum 5 provided with an opening 23 in its side wall, a flexible supporting sheet 25 larger than the opening 23 and having an opening 26 in alignment therewith and a flexible porous screen 24, adapted to pass a coating material, secured to the supporting sheet over the opening, the supporting sheet being mounted at the under side of the side wall of the drum and located with the screen over the opening 23.  The screen 24 is larger than the openings 23 or 25 and overlaps the edges thereof between the inner surfaces of the drum and the outer face of the supporting sheet.  The supporting sheet is stuck to the inner surface of the drum and the ends may overlap as at 27.  The coating material 30 is forced through the screen by a roller 31 inside the drum.  Parts of the screen may be obscured by a mask 29 to form a pattern.  Specification 599,856 is referred to.
Patent GB-330133-A (GB)
Title: Improvements relating to ceiling fittings for electric lamps
IPC: F21V21/02
Filed: 1929-05-31
Abstract: 330,133. Dennis, G. P. May 31, 1929. Supporting.-A ceiling rose 5 for an electric lamp is made of mouldable material with an internally-threaded metal ring 6 moulded in position therein for attaching it to the lampholder 2 carried by a plate 1 fixed to the ceiling. The mouldable material may be an artificial resin, a phenolic condensation product or a synthetic material formed from casein. The rose may be painted, polished, fluted or otherwise ornamented.
Patent GB-233926-A (GB)
Title: Improvements in devices for supporting and facilitating the use of such articles as tea pots
IPC: A47J36/34
Filed: 1924-07-14
Abstract: 233,926. Lyons & Co., Ltd., J., and Oliver, G. W. July 14, 1924. Stands and tilters.- A holder for large teapots, enabling them to be readily tilted for pouring, comprises a cradle 2 supported by means of trunnions 3 at the ends of links 4 which in turn are carried by trunnions 7 at the ends of a yoke 8 which can turn freely about a rod 9 or other suspending means. The rod 9 may, as shown, be suspended from a trolley mounted to run on an overhead trackway. A strainer 15 is hinged or otherwise mounted on an arm 16 so disposed that tea being poured from the pot will pass through the strainer.
Patent GB-858476-A (GB)
Title: Hydraulic control valve
IPC: F15B13/04
Filed: 1959-05-19
Abstract: 858,476. Valves. NEW YORK AIR BRAKE CO. May 19, 1959 [Sept. 15, 1958], No. 16925/59. Class 135. A valve suitable for controlling a differential-area piston motor 52 for positioning the earth moving blade of a bulldozer comprises a movable closure member 33 having a neutral position in which a pump connected to an inlet 12 is unloaded by being connected through ports 21, 23 and port 22 communicating with an exhaust 13 whilst connections 53, 54 to the two sides of the motor 52 are isolated. When the closure member is moved to the right from the neutral position the communication between the ports 12, 13 is interrupted and pressure fluid is delivered from port 21 to the port 18 communicating with the lower side of the motor 52. A parallel path of fluid to the motor is also provided through the inlet port 23, a port 24, and a passage 31 interconnecting the port 24 with a port 19. The upper side of the motor is exhausted to a port 26 through the motor port 25 and a reduced portion 37 of the closure member between lands 42, 43. When the closure member is moved to the left from the neutral position the connections to the motor are reversed. The closure member can be moved further to the left, corresponding to engagement of a spring-loaded detent 44 with a recess 45, to the position shown in Fig. 5 in which communication between the motor port 18 and exhaust through a port- 17 is interrupted by a land 39, the port 19 is isolated from the inlet, and the two ends of the motor are interconnected by the passage 31 allowing the motor to float whilst being in communication with the inlet and exhaust. The closure member may be moved slightly further to the left until it abuts a stop 51 when the land 42 will restrict the communication of the inlet and the motor ports with exhaust. The inlet to the valve is provided with a pressure relief valve 32. Specification 838,686 is referred to.
Patent GB-1469484-A (GB)
Title: Electro-hydraulic actuating device for a motor vehicle gear box
IPC: F16H61/02
Filed: 1974-04-18
Abstract: 1469484 Change-speed control ROBERT BOSCH GmbH 18 April 1974 [19 April 1973] 16925/74 Heading F2D A valve spool 22 governing a control pressure in an outlet 7 which leads to a main regulating valve (not shown) controlling ratio selection in a vehicle gear-box is displaced by pressure variations in a chamber 46 controlled by a pilot valve plunger 39 actuated by a solenoid 11 subject to electrical signals 10 dependent upon engine speed and/or throttle valve position, and a spool 16 limits the maximum value of the control pressure. When the pilot valve is controlled by throttle valve position an increase in throttle opening causes approach of the plunger 39 towards a seat 43 to increase the pressure in the chamber 46 and cause leftward movement of the spool 22 to connect an hydraulic pressure supply line 15 with the outlet 7 and thereby increase the pressure in the latter. The increased outlet pressure acts through a bore 21 on the left-hand end of the spool to oppose the pressure in 46. When the throttle valve is fully opened the plunger 39 engages the seat 43 and causes maximum leftward displacement of the spool 22 so that a spring abutment 41 is displaced and this, together with the pressure in the outlet 7 acting on the right-hand end of the spool 16 causes the latter to limit the outlet pressure by opening an exhaust 17b. The maximum leftward displacement of the spool 22 also connects a passage 27 in the spool with an outlet 8 leading to a kick-down valve (not shown).
Patent GB-182113-A (GB)
Title: Improvements in or relating to installations of incandescent cathode-rectifiers
IPC: H02M7/06
Filed: 1922-06-19
Abstract: 182,113. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. June 22, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Vapour and vacuum or low-pressure apparatus, arrangements of. - In a rectifying system having one or more thermionic valves, the connections of the filament circuit or circuits are such that the rectified current may be made to leave at either end of each of the filaments. The life of the filaments is thereby increased, if the connections are changed periodically. As shown in Fig. 6, the filaments K<1>, K<2> of two valves are connected in series with the secondary windings s', s<2> of a transformer P, the rectified current passing through the ends M<1>, L<2> of the filaments to a common connection C. When the valves are interchanged, the current passes through the outer ends M<2>, L<1>. In another arrangement, Fig. 3, the circuits of the filaments K', K<2> are reversed by means of two interconnected double-pole switches B<1>, B<2>; or a single switch may be used.
Patent GB-884517-A (GB)
Title: A tufting machine provided with an alarm and/or stop mechanism
Inventor: PICKERING EDGAR
IPC: D05C15/00
Filed: 1958-05-28
Abstract: 884,517. Sewing-machines. COBBLE BROS. MACHINERY CO. Ltd. May 28, 1959 [May 28, 1958], No. 16971/58. Class 112 To prevent damage to a tufted product when failure occurs of the means to cut tufts engaged by a looper below the fabric a mechanism is provided to stop the tufting machine and/or actuate an alarm. The mechanism comprises a set of feelers 14 one arm of which rests on the fabric, and contacts arranged to be operated by movement of any feeler due to the fabric on which it rests being pulled down from its normal position. The angle bar 1 which forms a presser foot is provided with brackets 6 recessed to accommodate an insulated packing 9 carrying a contact bar 10 extending the full-length of the multi-needle machine. A bar 8 secured to the underside of the brackets by thumbscrews 16 is provided with a number of transverse slots, one for each needle, each slot freely accommodating a feeler 14 pivoted on a common pivot bar 13 located in a longitudinal slot 12 running through the transverse slots. Clamping screws (not shown) in some of the webs between the transverse slots hold the bar 13 in place, while the thumbscrews 16 permit removal of the bar 8 to permit free access to the needles when necessary. Each feeler has a long finger 18 riding on the fabric and normally this holds the feeler with its short finger 17 away from the contact bar 10. If the fabric is pulled down by loops remaining uncut and not released from the looper the finger 18 falls and the finger 17 moves to engage the bar 10 and complete the circuit. In a modification the feelers are not disposed in slots in the bar 8 but are spaced from each other by washers on the bar 13. In a further modification the fingers normally maintain a circuit and interrupt it when the fabric is pulled down.
Patent GB-758921-A (GB)
Title: Improvements in and relating to electrical terminals
Inventor: WALTON GORDON HERBERT FRANCIS
IPC: H01R4/52
Filed: 1953-06-19
Abstract: 758,921. Binding-posts. DIAMOND H. SWITCHES, Ltd. June 8, 1954 [June 19, 1953], No. 17076/53. Class 38 (1). A wire 6 is clamped between a V-shaped member 1 having an aperture 13 and a pivoted eccentric 7 provided with ratchet teeth 9, by rotating the eccentric 7 anticlockwise, inserting the wire, which causes eccentric 7 to rotate clockwise, and then pulling upwardly on the wire causing the teeth 9 to grip it, the wire being forced against the edge of the aperture 13. The eccentric 7 is spring-loaded in the anti-clockwise directions In an embodiment suitable for two conductor. (Fig. 4, not shown) two eccentrics are provided in the member 1 and separated by a spacer.
Patent GB-247073-A (GB)
Title: Device for actuating double contacts for illuminated advertisement apparatus
IPC: G09F13/28
Filed: 1925-07-03
Abstract: 247,073. Pedersen, N. E. July 3, 1925. Stencil switches.-In monogrammic apparatus for advertising &c., of the type in which lamps 13, Fig. 1, are connected to a bank of contacts controlled by a stencil belt passing between contact springs 7 and a fixed plate 3, the springs are arranged so as to make contact with a second plate 4 when engaged by raised portions 16 of a second belt or strip 9 adapted to be introduced over the stencil belt 8 in order to add fresh matter to the advertisement. The belts are driven by an endless belt 18, Fig. 2, provided with teeth 19 which engage holes 20, Fig. 3, in the belts 8, 9. The latter consist of cards of insulating material connected by hooks 21. The cards of the belt 8 have perforated letters 15, while those of the belt 9 have raised letters 16. The belt 9 is broader than the belt 8. The apparatus is provided with inclined rails 25, 26, Fig. 2, which support the belts 8, 9 respectively by means of projections 27 provided on some of the cards. To guide the belt 9 on to the rails 26, guides 28 are provided between which the belt 8 can pass, while the belt 9 is guided so as to fall clear until caught by the rails 26. To facilitate the insertion of the belt 9, the first card 29, Fig. 3, is made with elongated slots 30 adapted to be easily engaged by the teeth of the driving belt 18. The belts 8, 9 may consist of separate sections, each section having an initial card 31, Fig. 5, provided with hooks 32 and projections 27, and a final card 33 provided with projections 34 which engage in the hooks 32 of the succeeding section hanging by the projections 27 on the rails of the apparatus and so draw it into engagement with the teeth of the driving belt 18. Other guide devices such as screwthreaded spindles may be used in place of the rails 25, 26. Screw-threaded spindles may also be used in place of the belt 18.
Patent GB-986012-A (GB)
Title: Method of receiving voice-frequency code signals
IPC: H04Q1/453
Filed: 1962-05-04
Abstract: 986,012. Selective signalling. STANDARD TELEPHONES & CABLES Ltd. May 4, 1962 [May 5, 1961], No. 17197/62. Heading G4H. [Also in Division H4] An arrangement for receiving VF signals comprising one or several frequencies selected from a number of frequencies, e.g. for sending numerical information in a telephone system, employs a number of receivers each of which responds to a range of adjacent signalling frequencies. In the case of a 1-out-of-10 code the receivers E1- E6 Fig. 2, respond to the ranges S1-S5, S2-S6 and so on to S6-S19. This results in a simple contact tree, Fig. 3, for controlling the outgoing circuits. When a 2-out-of-6 code is used, the receivers E1- E5, Fig. 4, respond to adjacent pairs of frequencies, and the code combinations to be used are limited to those which produce different effects. Other codes considered are 2-out-of-4, 2-out-of-5 and 1-out-of- 4 plus 1-out-of-4. It is practicable in some cases to choose the combinations to be used in such a way that the failure of one frequency or the addition of an unwanted frequency may be recognized at the receivers.
Patent GB-421189-A (GB)
Title: Improvements relating to thermionic tube amplifiers
IPC: H03F3/32
Filed: 1933-06-16
Abstract: 421,189. Automatic regulation. NTJMANS, J. J., 160, Prins Mauritslaan, The Hague. June 16, 1933, No. 17264. Convention date, June 16, 1932. [Class 38 (iv)] [See also Group XL] In an amplifier of the push-pull type in which each valve is biassed to operate on the curved part of its characteristic, means are provided to avoid distortion and may be such as to maintain the anode voltage or such as to adjust the grid bias. Fig. 3 shows an arrangement in which anode current varies the saturation of chokes 23, 24 in the primary of the input transformer 21 and may be arranged to over-compensate for the voltage drop.
Patent GB-647115-A (GB)
Title: Improvements in or relating to means for testing electrical ignition systems of internal combustion engines
Inventor: ROBERTS WILLIAM RICHARD JOHN B
IPC: F02P17/02
Filed: 1948-06-28
Abstract: 647,115. Testing ignition. ENGLISH ELECTRIC CO., Ltd. June 28, 1948, No. 17289. [Class 7(iv)] [Also in Group XXXVI] The oscillograph apparatus C, (see also Group XXXVI), includes additional apparatus B to enable it to be used if for any reason the engine cannot be started. Upon closing. the ignition switch 2 power is supplied from the ignition battery 1 to the operating coil (not shown) of a vibrator and the primary of test ignition coil 7. The vibrator moving contact 10 and one of its fixed contacts 9 produce, in conjunction with the coil 7, a series of spaced impulses in a load 12, which trigger the time base circuit of the oscillograph C at vibrator frequency. In order to energize the lead 15, which is connected to the signal input circuit of the oscillograph, the engine is rotated by hand until the ignition contact breaker 4 is open, whereupon the distributor 6 is connected to a spark plug, (not shown) so that the circuit through moving contact 10 and the other fixed vibrator contact 13 will cause that particular plug to operate so that the characteristics of system A, including the plug, will be displayed on the oscillograph C. The entire apparatus is connected to earth by means of leads 16 and 17, whilst an additional battery 19, with a tapped resistance 22, may be used to assist the ignition battery 1. The secondary of coil 7 is connected to an adjustable spark gap 27 the voltage across which is applied to lead 12. In a modification, the circuits are arranged for a magneto ignition system by removing the tapped resistance, the additional battery new being an essential feature, whilst a condenser is used in conjunction with the test coil primary and the vibrator coil is connected across the battery. A changeover switch is provided to enable this apparatus to be used with either coil or magneto ignition, this being due to a necessary difference in earthing arrangements between these two systems. A resistance or lamp is connected in series with the battery when the switch is set to test a magneto system. The vibrator may be replaced by a motor driven contact breaker and the apparatus may be used for testing individual ignition system components. The Provisional Specification describes also how the apparatus B may be modified for testing continuity by the addition of a lamp or meter; a test probe may also be used with apparatus B to carry the high-tension output from coil 7 and thus to indicate the break down of the insulation of any conductor by causing a spark to take place between that conductor and earth. When an additional circuit is coupled to the primary of the coil in apparatus B the secondary of this coil may be provided with an adjustable spark gap or variable resistance to vary the primary voltage.