baber/WOPTO huggingface dataset:
Patent GB-297202-A (GB)
Title: Improvements in or connected with pneumatic oleo buffer struts
IPC: B64C25/60
Filed: 1927-08-23
Abstract: 297,202. Blackburn Aeroplane & Motor Co., Ltd., and Crawshaw, A. H. Aug. 23, 1927. Pneumatic springs; dashpots. - A pneumatic buffer strut having oleo or dashpot retarding- means especially for use on aircraft is provided with means for regulating the flow of liquid comprising valve mechanism which automatically varies the opening of the throttling ports. During the compressive movement a spring pressed valve uncovers ports at a rate determined by an auxiliary dashpot, the valve being closed against the pressure of the spring when the strut expands to its extended position. Fig. 1 shows the strut fully extended and Fig. 2 fully compressed. A cylinder B is attached to the lower structure such as the landing chassis or floats and a plunger A is connected at its upper end to the fuselage. A tubular needle C passes with small clearance through an opening A<4> in the piston A<2> on the lower end of the plunger A and also carries at its upper end a recoil piston D fitting the plunger A. Holes C<1> in the tube C connect the underside of the piston A<2> to the upper side and to the space above the recoil piston D, the upper and lower parts containing respectively liquid and air. The cylindrical valve E, forming the principal feature of novelty, automatically regulates the opening of the ports A<3> in the piston A<2>. This valve is pressed upwards by a spring F, the rate of movement being regulated by the flow of liquid through a small hole E<1>. The strut is normally extended by the internal air pressure as shown in Fig. 1, and the cylindrical valve E is then held in its lowest position closing the ports A<3> by the recoil piston D, the spring F being compressed. When landing, the compression of the strut is resisted by an increasing air pressure and by decreasing resistance due to the, flow of liquid. At the commencement of the movement liquid can only flow through the holes C' but as soon as the piston A<2> starts to move downwards, the spring F raises the valve E against resistance due to flow of liquid through the hole E<1> so that the valve uncovers the. ports A<3> giving a gradually decreasing resistance.
Patent GB-833364-A (GB)
Title: Improvements in and relating to high voltage current transformers
IPC: H01F38/30
Filed: 1956-07-18
Abstract: 833,364. Protective cut-out arrangements. GENERAL ELECTRIC CO. July 18, 1956 [July 18, 1955], No. 22257/56. Class 38 (5). [Also in Group XXXV] A current transformer (see Group XXXV) comprises a primary winding 11 surrounded by a grounding shield 31, secondary windings 12, 13 interlinked with the primary winding, and a grounding cable 35 connected to the shield 31 and interlinked with at least one secondary winding to enable protection to be provided against internal faults in the transformer. The cable 35 in Fig. 1 interlinks both secondary windings and is connected to earth through a spark gap 59 or switch 58. The transformer forms part of a differential protective arrangement for the isolation of sections 43, 46 of a -supply bus 40 by circuit-breakers 42, 44, 47 on the occurrence of a ground fault. The secondary winding 12 is connected in series with the secondary winding of a current transformer 50 and on a ground fault occurring in section 43 the differential current actuates relays 51, 52 to trip the circuit-breakers 42, 44 and isolate section 43. The section 46 may be isolated in a similar manner by circuit-breakers 44, 47. A shield 23 is connected through a housing 21 to the current transformer terminal 19 so that a fault on conductor 45 appears as a fault in the section 46. If an internal fault occurs in the transformer, fault current flows to earth through the cable 35, which is linked with the secondary windings 12, 13 so that the currents induced in these windings are altered and the balanced circuits are upset, causing the three circuit-breakers to open. The loop of the cable 35 around the winding 12 may be omitted so that an internal fault in the current transformer results in the opening of the circuit-breakers 44, 47 only. Modifications described involve the use of cable type or bushing type current transformers.
Patent GB-1183790-A (GB)
Title: Process for the Hydrolysis of Sulfonated Polymeric Materials
IPC: C08F8/34
Filed: 1968-05-10
Abstract: 1,183,790. Hydrolysing sulphonated polymers. AMERICAN MACHINE & FOUNDRY CO. 10 May, 1968 [29 May, 1967], No. 22266/68. Heading C3G. A substantially completely hydrolysed sulphonated polymeric material is produced by contacting the polymeric material with a sulphonating agent, contacting the sulphonated material with a hydrolysing system including a hydrolysing agent and a swelling agent selected from ketones having the formula  wherein R and R<SP>1</SP> are alkyl groups containing 1 to 4 carbon atoms, and aromatic compounds having the formula wherein R is an alkyl or alkenyl group containing 1 to 4 carbon atoms and x has a value of 0 to 4, and substantially completely hydrolysing the sulphonated material. The polymeric material is preferably a graft polymer, e.g. polyethylene or polypropylene grafted with styrene or a graft polymer having a halocarbon backbone consisting of polytetrafluoroethylene, polychlorotrifluoroethylene, polyperfluoroethylene, polyvinylidene fluoride or poly-l,l-difluoro-2,2- dichloroethylene and a polystyrene superstrate. Suitable swelling agents include acetone, methyl ethyl ketone, benzene, toluene and xylene. The hydrolysing agent may be water or an aqueous solution of an alkali metal or ammonium hydroxide, carbonate, chloride or sulphate. In the examples, (a) a polytrifluoromonochloroethylene film is grafted with styrene, divinyl benzene, and ethyl vinyl benzene, chlorosulphonated and then hydrolysed in a mixture of water and acetone, xylene or both acetone and methyl ethyl ketone, (b) a polytrifluoromonochloroethylene film is grafted with styrene, sulphonated and then hydrolysed in a mixture of water and toluene or benzene, (c) a polyethylene film is grafted with styrene, chlorosulphonated and hydrolysed in water and acetone and (d) a polyperfluoroethylene film is grafted with styrene, chlorosulphonated and hydrolysed in a methyl ethyl ketone/water/ NaOH system.
Patent GB-598994-A (GB)
Title: Improvements in or relating to the manufacture of metal screens and electron discharge devices comprising such screens
IPC: B21D47/00
Filed: 1945-08-29
Abstract: 598,994. Making metal mesh screens. HOLMAN, H. E. Aug. 29, 1945, No. 22273. [Classes 83 (ii) and 83 (iv)] [Also in Group XL] Punchingand embossing dies ; perforating.- In a method of making 'a metal mesh screen, suitable for use in cathode-ray tubes used for television transmission, a matrix is provided having grooves corresponding to the pattern of the mesh and a thin sheet of metal to form the mesh is pressed against the matrix by a second matrix formed with ridges corresponding to the grooves so as to force the metal of the sheet into the grooves, the metal between the grooves being subsequently removed to form the mesh. In a modification, the second matrix is replaced by a compressible pad, the first matrix having flat areas between the grooves. A wax plate is ruled in two directions at right angles with 200 V-shaped grooves per inch, 0.003 inches deep. The plate is rendered conducting by a film of graphite and a master plate is obtained by electro-deposition in known manner. From this is produced a positive matrix 1 having grooves 3. A negative matrix 2 is formed by electro-deposition on the matrix 1, the apices of the projections 4 being removed by lapping. Matrix 1 may be of copper and matrix 2 of nickel or of copper coated with nickel or chromium. A sheet of aluminium about 0.003 inch thick is pressed between the matrices, so that metal of the sheet is forced into the grooves 3 as shown in Fig. 3. The matrix 2 is stripped off and if the portions 7 of the plate between the grooves have not been completely severed, they are removed by lapping. The matrix 1 is then removed by a chemical solvent leaving a metal mesh screen of aluminium. When the second matrix is replaced by a compressible pad, the pad may comprise watersaturated bristol board or like material. Specifications 458,675 and 533,213, [Group XL], are referred to.
Patent GB-1430636-A (GB)
Title: Sheet control arrangements
IPC: G03B27/60
Filed: 1973-05-10
Abstract: 1430636 Feeding sheets RICOH KK 10 May 1973 [11 May 1972] 22281/73 Heading B8R [Also in Division G2] A photocopying machine includes a conveyer comprising a plurality of spaced, parallel belts 1 and a plate 2c in contact with one of the runs of the conveyer and having an elongate aperture 2a extending transversely of the belts so that it communicates with all the spaces between the belts, the aperture also being in communication with a negative pressure chamber 2 so that when the chamber 2 is evacuated and a sheet A is placed on the conveyer air flows along the ducts formed by the plate 2c, belts 1 and sheet A and atmospheric pressure presses the sheet into uniform contact with the conveyer. The belts are preferably of circular cross-section and the effective length of the aperture transverse to the belts may be adjusted by flaps 8, 8<SP>1</SP> which move to close off part of the aperture. The flaps are controlled by a contact lever 11 which engages the spool A1 carrying the roll of copying material from which the sheet is severed and controls the flaps via a linkage 6, 7, the inclination of the flaps being determined by the size of the spool and hence of the sheet, i.e. the effective aperture is reduced for smaller sheet width. In an alternative embodiment the lever 11 controls sliding plates, which are in contact with plate 2c, to vary the effective aperture.
Patent GB-431436-A (GB)
Title: Improvements in or relating to water-tube steam generators
IPC: F22B35/10
Filed: 1934-07-31
Abstract: 431,436. Instantaneous steam generators. SULZER FRERES SOC. ANON., Winterthur, Switzerland. July 31, 1934, No. 22370. Convention date, Aug. 26, 1933. [Class 123 (ii)] In a boiler of the kind in which water is forced through a tube 1 having a length of at least 10,000 times its internal diameter, the valve 4 controlling the steam outflow is operated by a member 9 influenced in accordance with the steam temperature, or in accordance with any other working valve, variations in which result from or cause variations in the steam pressure. The member 9 may be influenced in accordance with the temperature difference at two points of the boiler, the speed of flow of the water, the supply of air or fuel to the furnace, the supply of feedwater, the condition of the flue gases, the speed of the engine driven from the boiler, or the load on a dynamo driven by the engine.
Patent GB-398335-A (GB)
Title: Improvements relating to selecting switches for automatic telephone and like selective systems
IPC: H01H63/04
Filed: 1932-08-10
Abstract: 398,335. Automatic exchange switches. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and HUMPHRIES, H. E., 61, Rochester Way, Blackheath, both in London. Aug. 10, 1932, No. 22382. [Class 40 (iv).] A single-motion rotary switch in which each wiper comprises two members 18, 19, the tips of which engage opposite sides of the bank terminals and each feed brush comprises two members 12, 13 located between the members 18, 19 and having outwardly splayed ends may be assembled when all the wipers are in line by positioning the wiper assembly so that each wiper embraces the corresponding feed brush at an intermediate point and then moving it towards its central position with respect to the bank. When, however, the switch has angularly spaced wipers for engaging different rows of terminals, in adopting this procedure only some of the wipers embrace their feed brushes, and the ends of remaining feed brushes present an obstruction. To overcome this difficulty, as many of the wipers as is necessary are provided with extensions or " tails " 21 which embrace the feed brushes in the preliminary position shown in Fig. 2. As the wiper shaft is inserted into the slots 16, the splayed ends of the brushes are compressed by the wipers and tails which embrace them. The wipers may be slotted at 27 and ribbed at 28, as shown in Fig. 4, and the tails may have bent up edges 22 for engaging the ends of the feed brushes.
Patent GB-928415-A (GB)
Title: An improved centrifugal pump for mixed media
IPC: F04D23/00
Filed: 1959-06-30
Abstract: 928,415. Centrifugal pumps. ETA-CORPORATION G.m.b.H. June 30, 1959 [July 4, 1958], No. 22391/59. Class 110 (1). A centrifugal pump for mixed media, i.e. liquid or gaseous media, or both, serving as entraining media for solids such as coal, ore or grain, comprises a casing having a central inlet, and an open-sided bladed impeller mounted within the casing with its open side facing the inlet, the walls of the impeller and casing conjointly forming a converging entry section to the throat of an annular outlet nozzle which encircles the impeller and has diverging from the throat an outlet section which is formed by the casing and into which the impeller does not project, the entry section, throat and outlet section of the nozzle merging smoothly into one another. In the centrifugal pump shown, the impeller is open on the suction side and the wall 4 of the impeller merges with the adjacent wall of the casing to form an annular outlet nozzle of Venturi form with a throat 5. The impeller does not project into the nozzle further than the throat. The nozzle may widen in the peripheral direction to form a volute. The suction developed at the throat 5 assists in withdrawing the medium from between the impeller and the casing. The widening angle a of the nozzle may be such as to cause breakaway of flow, thereby forming eddy cavities which assist in conveying gaseous occlusions in liquid media. The free edges 10 of the impeller blades may project towards the media axis 13 of the nozzle to intensify the flow into the nozzle and so facilitate the delivery of entrained solids. For the same purpose, compressed air may be admitted to the casing, particularly at the nozzle throat, to produce turbulence or generate whirl.
Patent GB-830675-A (GB)
Title: Improvements in or relating to electric cable couplers
Inventor: TOWN WILLIAM LAURENCE
IPC: H01R43/24
Filed: 1957-07-15
Abstract: 830,675. Injection moulding electric couplings. BRITISH INSULATED CALLENDER'S CABLES Ltd. July 14, 1958 [July 15, 1957], No. 22422/57. Class 87(2). [Also in Group XXXVI] A coupling body 1 of thermoplastic material is moulded on to the end of a coaxial cable 2 in two stages whereby the tendency for the cable to distort due to the hot thermoplastic material melting the cable insulation is reduced. After connection of the centre and outer cable. conductors 3, 4 to the inner and outer contacts 7, 8, the outer conductor being clamped between sleeves 11, 12, a two-part mould, one part 21 of which is shown, is applied to the outer contact 8 and the cable end, and hot thermoplastic material is injected through a passage 22 to form an outer body part 9, further passages 24, 26 in the mould which communicate with ports 16, 17 in contact 8 being plugged during this operation. After cooling of the body part 9 these plugs are removed and a closure member 31 placed over the outer end of contact 8. Further thermoplastic material, which may have better electrical properties than that of the body part 9 is then injected through passages 24, 26 into the space between the inner and outer contacts to form an inner body part 10 which bonds to the cable insulation 5 and the contacts 7, 8. After cooling of this inner body, the two-part mould and closure 32 are removed.
Patent GB-1434121-A (GB)
Title: Display devices
IPC: G02F1/1343
Filed: 1973-05-10
Abstract: 1434121 Matrix displays THOMSON CSF VISUALISATION ET TRAITEMENT DES INFORMATIONS 10 May 1973 [10 May 1972] 22445/73 Heading G5C A display device comprises crossed conductor arrays h 4  . . . h 6  with non-square, rectangular or circular portions 1, 2 at the intersections. The portions may be triangular, diamond or with curved edges. Liquid crystal or electroluminescent material may be arranged between the arrays. The arrays may comprise two groups of interconnected vertical electrodes V 1  . . . V 10  and two groups of horizontal electrodes h, k.
Patent GB-588845-A (GB)
Title: Taking up back lash in gearing
IPC: F16H57/12
Filed: 1944-11-14
Abstract: 588,845. Toothed gearing. MURPHY RADIO, Ltd., FISHER, L., and WOOD, W. D. Nov. 14, 1944, No. 22461. [Class 80 (i)] [Also in Group XL] Means for taking up the backlash in toothed gearing connecting two spindles of, for example, a condenser drive of radio apparatus, comprises pulleys 5, 6 attached to the driving and driven spindles a, b which are connected by gearing 1, 2, 3, 4, and a cord 7 secured to and passing around these pulleys and another spring-loaded jockey pulley 8. The ratio of the diameters of the pulleys 5,6 is made the same as that of the gear train so that as the cord unwinds from one pulley it winds up on the other and the tension on the cord is arranged to be greater than the torque to be transmitted so that the backlash in the gearing is always in the same direction. In a modified arrangement the pulleys on the spindles a and b are the same size and two cords secured thereto pass over, and are secured to, two jockey pulleys of different sizes on a common axis which are angularly tensioned by a helical spring.
Patent GB-502326-A (GB)
Title: Improvements in or relating to control mechanism for vertical hydraulic broaching machine
IPC: B23Q5/06
Filed: 1938-07-28
Abstract: 502,326. Photo - electric control of broaching machines. LAPOINTE MACHINE TOOL CO., Ltd. (Lapointe Machine Tool Co.). July 28, 1938, No. 22489. [Class 40 (iii)] [Also in Group XXII] A hydraulic broaching machine is provided with a photo electric relay 57 in circuit with a switch 58 and a solenoid 55 which, when energized, operates a valve V controlling the movement of the main ram 12 to operate the broach B on its return upward movement. The relay serves to prevent the energization of the coil 55 for this return movement unless the work has been removed from the work table by the operator.
Patent GB-656551-A (GB)
Title: Improvements in or relating to vapour attemperators
IPC: F22G5/12
Filed: 1947-08-13
Abstract: 656,551. Steam, &c. attemperators. BABCO.CK & WILCOX, Ltd. Aug. 13, 1947, No. 22500. Convention date, Aug. 17, 1946. [Class 123(iii)] [Also in Group XII] A steam &c. attemperator disposed, for example between the primary and secondary superheaters 12, 42 of a steam boiler 10, comprises a chamber 16 which has end steam inlet. and outlet connectors 14, 41 and a lateral water nozzle connector 28 and is provided with a two-part liner, namely an inlet section 18 and a Venturi section 20, the section 20 also having a lateral connector 26 to mate with the connector 28 and receive a water nozzle 30. The nozzle 30 is spaced in advance of the throat of the section 20 a distance less than the diameter of the inlet of said section, and water may be supplied to the inlet pipe 32 thereof from the boiler feed water line 50, between the feed pump 52 and economizer 54. through an automatic valve 58, controlled by a relay 62 subjected to the steam flow and temperature in the main steam outlet pipe 44, or a manually-operated valve 72 in a byepass 70. The inlet and outlet ends of the two sections 18, 20 respectively are centred within the chamber-16 by a weldedon ring 24 and spaced lugs 22, and the inlet end of the section 20 is supported within the outlet end of the section 18 by four radial plates 23 welded to the former section and abutting against a ring 21 fixed within the end of the latter. Holes 19 are provided in the section 18 to permit flow of superheated steam between the chamber 16 and its liner. The spray nozzle 30 comprises a, circular chamber which is disposed tangentially to its inlet pipe 32 and is pro vided with a central conical outlet 76, in alignment with the axis of the liner 18, 20.
Patent GB-240811-A (GB)
Title: Improvements in carburettors for internal combustion engines
IPC: F02M19/08
Filed: 1925-09-09
Abstract: 240,811. Fitzpatrick, H. D., (Svenska Ackumulator Aktiebolaget Jungner). Sept. 9, 1925. Spray carburettors.-Annular members 5, 6, 7 are located in the casing 3 so as to form a choke tube for the main air supply entering at 8. The members 5 and 7 are separated from the central member 6 by distance pieces 13 so as to leave annular channels 14. 15 which, in the form shown in Fig. 1, converge and meet at the most constricted part of the choke tube. Surrounding the channels 14, 15 are distributing channels 11, 12 which are formed in the casing 3. The channel 11 communicates with the float chamber 2 through ducts 16, 17, 19 and nozzle 18, and the channel 12 communicates with the chamber through a conduit 21. The duct 16 and channel 14 may also communicate with the air inlet through a valve-controlled aperture 22. With this construction, fuel or a mixture of fuel and air may pass through the channel 14 and meet a current of air through the channel 15, the cunents being discharged directly into the main air stream. In a modification, Fig. 3, the central member 6 is of uniform width and the channels 14 and 15 are parallel and radial. In a further modification, the channels are partly convergent and partly parallel. The Specification as open to inspection under Sect. 91 (3) (a) states that the distance pieces 13 may be adjustable or exchangeable and that the distributing chambers form reservoirs which facilitate starting and acceleration. This subjectmatter does not appear in the Specification as accepted.
Patent GB-424265-A (GB)
Title: Improvements in or relating to brake mechanism
IPC: B64C25/48
Filed: 1933-08-14
Abstract: 424,265. Aircraft landing wheel brakes. ELEKTRONMETALL GES., Cannstatt, Stuttgart, Germany. Aug. 14, 1933, No. 22704. Convention date, Aug. 30, 1932. [Class 4] [See also Group XXXIV] Hydraulic brake apparatus comprises a valve for returning liquid from one or more brakes to the reservoir to permit release of the brakes irrespective of movement of the master piston, the piston being double-ended so that during the return stroke, liquid is forced into the system to compensate for the liquid that has returned to the reservoir. The valve may be operated by the rudder bar of an aircraft. The apparatus shown comprises a double-ended piston K\ K<2> actuated by a lever 5. The pipe connections P<1>, P<2> leading to two brakes which may be those of the wheels of an aircraft or a vehicle are adapted to be connected to the cylinder space Z<1> by a cock 4 which is provided with two through passages 41, 4<11> and also with passages 8, 8<1> communicating with the reservoir 2 and which may register respectively with the connections P<1>, P<2>. The lever 6 of the cock 4 may be connected to the rudder bar of the aircraft. A passage 10 provided with a non-return valve connects the chambers Z<1>, Z<2>. A passage 12 is uncovered in the release position of the pistons, to connect the reservoir to the chamber Z<1>. When the piston is moved to the left, liquid is forced through one or both of the connections P<1>, p<2> according to the position of the cock 4 and by subsequent movement of the cock one or other of the brakes may be released by registering one of the passages 8, 81 with the corresponding connection P<1> or P2. When the piston is moved to the left, liquid is drawn into the chamber Z<2> from the reservoir through a check-valve V. When the piston is returned liquid is forced from chamber Z' to chamber Z<1> through the passage 10 to compensate for any liquid that has been directly returned to the reservoir 2 through the passages 8, 8<1> of the cock 4, excess of liquid in chamber Z<2> being returned to the reservoir through a relief valve 9.