baber/WOPTO huggingface dataset:
Patent GB-1393162-A (GB)
Title: Arrangements for controlling acceleration process of gas turbine engines
IPC: F02C9/32
Filed: 1972-05-25
Abstract: 1393162 Gas turbine engine fuel systems MOTOREN-UND TURBINEN-UNION MUNCHEN GmbH 25 May 1972 [5 Feb 1972] 24818/72 Heading F1G [Also in Division G3] To prevent "surging" during the acceleration of a gas turbine its fuel supply is controlled (by an electromagnetic valve B) in response to speed error signals which are limited at least by the difference between the actual pressure ratio across the compressor stage and a target value for this ratio. As shown, the target ratio is determined at 9 as a function of compressor inlet flow related to inlet conditions, as determined by measurements of inlet total and static pressures # Pt-S1, Pt1, but alternatively the target may be a function of compressor speed related to inlet temperature. The actual compressor ratio, determined at 12, has added to it at 10 a differential (D) term which is a function of inlet total pressure Pt1, established at 11. The difference between the output of 10 and the target is amplified at 23 and is the limiting signal #2, but this can be blocked at 14 if the inlet pressure falls below a limiting value, set at 13. Other limiting signals are #3, which is a signal derived from temperature measurements indicating "flame out", and #4 which is the difference between the actual turbine acceleration (by differentiating a measured speed signal at 17) and a target value derived at 16 as a function of speed and inlet temperature Ttl. #4 is effective at low inlet pressures at high altitudes. These limiting signals are subtracted from a signal K5 which represents the maximum possible fuel flow during acceleration and the result multiplied by #0, which is the normal steady state fuel flow signal, at 6. The output of 6 is a signal # max. Another signal # min is derived by multiplying #o by a fractional constant K4. A fuel demand signal #1 from the speed governor is compared with # max and # min at 7, the output of which is thus #1 limited to be within these values and termed #5. In the event of "flame out" #5 is reduced to # min for a prescribed time at 15, the output of which #6 controls the fuel valve. Speed governor Desired speed N H nom or an idling speed is selected at 1 and at 4<SP>1</SP> limits signals 3<SP>1</SP> are subtracted if actual speed (in relation to inlet) temperature), compressure outlet pressure, or turbine exhaust temperature limits are exceeded. From this modified desired speed signal is subtracted the actual speed signal NH and the differerence is fed to a proportional plus integral device 3, the integration stage of which is blocked if #1 is limited at 7. The output of 3 is combined with the steady state signal #o at 4 to form the fuel demand signal #1. #o is derived from measurements of actual speed and inlet pressure and temperature. Pressure transducers, producing electrical signals, are housed in a thermostatically controlled box and there may be several in cascade, each for a different range of temperature.
Patent GB-716504-A (GB)
Title: Improvements in or relating to impact-operable electric alarm switch devices
Inventor: TOWNSEND FREDERICK HENRY
IPC: H01H35/14
Filed: 1952-10-24
Abstract: 716,504. Impact-operable switches; switch cases. CATHODEON, Ltd. Oct. 24, 1952, [Oct. 25, 1951], No. 24977/51. Class 38(5) An impact-operated switch intended for use with fire-preventing means on an aircraft, comprises a frangible casing 1 enclosing a coiled electrode 9 and a rod electrode 5. one end of the rod 5 being located in an insulating block 8 so that undesirable lateral movement of the rod is prevented. The upper end of the rod 5 is sealed through a glass bead 7 to a metal mounting 4 soldered to a flange 3 sealed to the casing 1. The coiled electrode 9 is under compression and acts between an apertured metal cup 10 on the block 8 and an apertured metal cup 14 accommodated in a further metal cup 17 slidable relatively to the mounting 4 in a direction along the rod axis, a spring 19 thus being held under compression by the electrode 9 between the mounting 4 and a shoulder 20 on the cup 17. On fracture of the casing 1 such that its lower part is removed, the electrode 9 removes its pressure on the spring 19 which thereupon moves the cup 17 so that a shoulder 21 thereon engages a contact 22 on the rod 5 and an external circuit is completed. Should the blow strike the casing 1 end on, the electrode 9 is further compressed and the cup 10 engages a contact 23 on the rod to complete the circuit. If the blow is sideways the circuit may also be completed by the direct engagement between the electrodes 1. 5. The switch may be mounted in a separate socket, Figs. 1, 3, and to this end an externally threaded metal sleeve 24 is secured to the mounting 4. The socket comprises a spring 32 non-rotatably mounted in a body 26. the sleeve 24 being screwed into the spring. One end 35 of the spring is connected to a terminal 36 situated in an insulating block 38 fixed by screws 46, 47 to the body 26, and a termination 25 on the rod 5 abuts a stud contact 42 on the block 38 connected to a further terminal 40. The external leads pass to the terminals 36, 40 through rubber seals 51, 52 and channels 49. 50 in the block 38, a cover 54 being screwed to the latter. A further cover 56 is screwed over the body 26 and rubber seals 48, 55. 59 are provided between the several parts of the socket. In another construction, Fig. 4, an insulating block 66 is moulded around the end of the switch, the block having a terminal 65 connected by a lead 64 to the rod 5. the other terminal comprising a flange 61 soldered to the mounting 4. To facilitate testing, a connection 69 from the rod 5 is sealed through the casing 1 to a terminal 70. Specification 574,947 is referred to
Patent GB-885980-A (GB)
Title: Improvements in or relating to the electrolytic production of sodium
IPC: C25C3/02
Filed: 1960-07-18
Abstract: 885,980. Producing sodium by electrolysis. DU PONT DE NEMOURS & CO., E. I. July 18, 1960 [Aug. 10, 1959; June 20, 1960], No. 25012/60. Class 41. Sodium containing only 0.5% to 3.0% by weight calcium is produced by electrolysing with direct current a fused salt mixture comprising the following composition by weight :- CaCl 2  15-30%, NaCl 20-35%, BaCl 2  balance, where the NaCl is 20-30% when the CaCl 2  is less than 24%. Preferably the operating temperature of the cell is 545‹ to 630‹ C., about 15‹ C. above the melting-point of the electrolyte. The sodium may be removed from the fused salt mixture at not less than 375‹ C., cooled to 115‹ C., then filtered to reduce the Ca content to less than 400 p.p.m. Specifications 16060/1890, 238,956, and U.S.A. Specifications 2,850,442 and 2,876,181 are referred to.
Patent GB-213199-A (GB)
Title: An improved safety device for mine cages or the like
IPC: B66B5/26
Filed: 1923-10-09
Abstract: 213,199. Thomas, T. P. Oct. 9, 1923. Catch gear of mine-cage type.-A ladder-like structure 2 is placed between a pair of cages and is engaged by the hooked end of arms 9 carried by the cages when the hoisting rope breaks. Each arm 9 is pivoted to a pair of L-section bars 8 which are connected by bolts to a plate 5. Springs 11 are placed between the plate 5 and the top 6 of the cage. The structure 2 may be supported resiliently.
Patent GB-537464-A (GB)
Title: Improvements in automatic locking devices for aircraft undercarriages
IPC: B64C25/22
Filed: 1939-09-01
Abstract: 537,464. Aircraft undercarriages. SOC. OLAER (SOC. ANNON. DE. MATERIEL OLEOPNEUMATIQUE), and MERCIER, J. Sept. 1, 1939, No. 25137. Convention date, Dec. 6, 1938. [Class 4] Relates to the control of the hydraulic jack or jacks for operating the undercarriage of an aircraft in such a manner that while the undercarriage may be lowered at all times, it can be retracted only after the weight of the aircraft is removed therefrom on taking-off. As shown, a wheel support 3 is mounted elastically in a leg or part 2 adapted to be operated by a double acting hydraulic jack 4 provided with fluid through pipes 5, 6. A non-return valve 7 is arranged in the pipe '5 and, when the aircraft is in the air and the part 3 is freely projected from the leg 2 of the undercarriage, a rod 12 connected to a valve 11 maintains a byepass connection 9, 10 across the valve 7 in the pipe 5. When the part 3 moves upwardly with respect to the part 2 where the aircraft is on the ground, the valve 11 closes the passage between the pipes 9, 11, and, while fluid can pass the valve 7 to operate the jack to lower the carriage, the jack cannot operate to retract it. In a modification, the valves 7, 11'are replaced by a normally-open non-return valve in the pipe 5 which is rendered operative by the deformation of the undercarriage when the aircraft rests upon it. The valve means for rendering the jack inoperative to retract the undercarriage when it is supporting the aircraft may be operated by a flexible or electromechanical distant control device actuated by the deformation of the undercarriage. A dash-pot or delay-action relay may be employed to maintain the undercarriage in the lowered position for a certain time after taking- off.
Patent GB-363650-A (GB)
Title: Improvements in or relating to centreless grinding machines
IPC: B24B5/32
Filed: 1930-08-22
Abstract: 363,650. Centreless grinding. WHITE, A. E., 5, Quality Court, Chancery Lane, London.-(Cincinnati Grinders, Inc.; 3058, South Street, Cincinnati, Ohio, U.S.A.) Aug. 22, 1930, No.25183. Addition to 357,188. [Class 60.] Trueing rotating tools.-A centreless grinding machine for grinding castors or other articles not suitable for grinding by the through-grinding process, comprises a carrier which moves a succession of the articles through the grinding throat in a direction perpendicular to their axes. The machine comprises a bed 10 carrying a grinding- wheel 12 and, on a slideway 13, a slide 14 movable by a screw 15 and a wheel 16. On the slide is a housing 17 carrying the regulating-wheel and the work carrier, the regulating-wheel consisting of an abrasive ring 29 carried by a cylinder 27 secured on a shaft 20 journalled in a frame 18 secured to the housing 17. Adjustably secured to the frame 18 by bolts 80 and slots is a plate 36 to which is secured a casing 38, and in the casing is journalled the hub 40 of the work-carrier 41, which is driven by a spindle 42 operated, through worm gearing 43, 47, a belt 52, and speed-transmission gearing 53 from a motor 54. The carrier 41 has ribs 44 projecting therefrom to form, with a closer plate 58, pockets, open at the outer and inner peripheries of the carrier, to receive the work 56; tapering grooves 59 are provided in the members 41, 58 to receive hub portions 57 on the work pieces. The carrier surrounds the regulating- wheel and is so adjusted that where it lies in the grinding-throat it approaches the regulating-wheel more closely than at other points, and work-pieces, delivered from a magazine 61 to the pockets, contact first with the regulating-wheel and then, as they pass through the throat, with the grinding- wheel. In a modification the carrier is rotated intermittently by ratchet gearing. A support 22 is provided having ways 23 for a device 24, 25, 26 for trueing the regulating-wheel.
Patent GB-417892-A (GB)
Title: Improvements in or relating to electromagnetic switches, particularly for flashing signs
IPC: G08B5/38
Filed: 1933-09-12
Abstract: 417,892. Electromagnetic interrupters. GORELY, C., Bluebell Cottage, Radfall Ride, near Whitstable, DUNSTER, C. G., Doomsday, Clowes Wood, Blean, near Canterbury, and KING, E. W. N., Northleach, Joy Lane, Whitstable, both in Kent. Sept. 12, 1933, No. 25189. [Class 38 (v).] An electromagnetic interrupter for controlling flashing signs comprises a plurality of relatively stationary contacts arranged in a horizontal row above a contact plate carried at one end of one arm of a pivoted insulating block the other arm being adapted to be moved upwardly by an electromagnetic device comprising a solenoid with a movable core carrying a projection which bears on the underside of the arm, the solenoid being short-circuited at the upward end of its stroke by contacts controlled by the movable block so that the movable contact plate returns to its horizontal position and in so doing picks up the relatively stationary contacts successively. As shown in the Figure an insulating block 11 pivoted at 10 carries two plates 13, 14, the latter being adapted to be engaged by a plate spring 32 carried by a lateral extension 30, 31 secured to a solenoid core 29 and the former being adapted to engage in succession a series of contact plungers 5 slidably supported within adjustable sleeves 6 and connected by flexible leads 4 to terminals leading from the separate lamp circuits to be controlled. In the position shown the solenoid circuit is completed at contact 34 and at the upward end of its stroke the plate 14 engages a contact 35 to short-circuit the solenoid 28 a lamp S being arranged in series to prevent short-circuiting of the mains. The return movement of the plate takes place under gravity. A dashpot cylinder 19 is pivotally attached at 18 above the plate 14 so that the speed of the movements of the contact arm may be regulated by the movement of the cylinder over a pivoted stationary piston 20 which is provided with a leak hole 23 the size of which may be adjusted by means of a disc 24 the angular movement of a corresponding hole 25 in which is fixed by a set screw 27. If desired a second electromagnet may be provided for completing the return movement of the contact plate.
Patent GB-719787-A (GB)
Title: Improvements in or relating to the manufacture of diisocyanate modified polyesters
Inventor: NAUNTON WILLIAM JOHNSON SMITH
IPC: C08G18/42
Filed: 1951-10-29
Abstract: A rubber-like material is made by reacting an aliphatic linear polyester with a diisocyanate in amount in excess of that capable of reacting with the end groups of the polyester, and reacting the polymer so obtained with water in the form of water of crystallization of a salt.  Specified polyesters are the reaction products of ethylene, a propylene or a butylene glycol with adipic, sebacic or methyl-adipic acid.  Specified diisocyanates are the naphthalene, 2 : 4- or 2.6-toluene and 1-chlorobenzene-2 : 4-diisocyanates.  Specified salts are sodium sulphate, tetraborate, pyrophosphate and carbonate; potassium aluminium sulphate; potassium borate; magnesium sulphate, metaborate and orthophosphate; and calcium sulphate.  In example a polyethylene adipate wax (M.W. 2,500; hydroxyl number 41; acid number 2.5) is heated at 130-140 DEG  C. with 1 : 5-naphthalene diisocyanate.  The hydrated salt is then added and when the mixture disintegrates into a rubbery crumb it is moulded into a sheet at 163 DEG  C. and 0.5 tons per square inch pressure.
Patent GB-615306-A (GB)
Title: Improvements in and relating to the manufacture of shoes with ornamental or patterned uppers
IPC: A43B23/24
Filed: 1944-12-16
Abstract: 615,306. Ornamenting shoe uppers. MAKSSIM, J. Dec. 16, 1944, Nos. 25272/44 and 21899/45. Drawings to Specification. [Class 17 (ii)] [Also in Group XV] A one-piece component of a shoe upper equivalent in size and shape to a number of principal upper components is ornamented differently in adjacent areas by surface treatment to give the appearance of being made in two or more parts. Such surface treatment may be applied to the component before or after it is cut out. The upper component may be of leather, imitation leather, rubber, fabric, rubber or synthetic material, and the ornamentation may be by colouring or printing, embossing, branding or by a photographic process. A water resistant film may subsequently be applied. Alternatively, the surface treatment may comprise imparting to one area of the component an appearance resembling imitation crocodile, lizard or other fancy leather. The invention is applicable to sandal straps. Specifications 23279/05, [Class 17], and 404,556 are referred to.
Patent GB-387413-A (GB)
Title: Multi-stage thermionic amplifier tube
IPC: H01J21/20
Filed: 1931-09-09
Abstract: 387,413. Electron-discharge tubes. ARDENNE, M. VON, 19, Jungfernstieg, Lichterfelde-Ost, Berlin. Sept. 9, 1931, No. 25276. Convention date, Sept. 9, 1930. [Class 39 (i).] In a multi-stage thermionic amplifier tube the control electrode of one stage, which serves also as the anode of the preceding stage, is screened against receiving electrons on the side directed towards the discharge space of its stage by means of an imperfect insulation in order to avoid any direct influence on the anode current of the voltage between the control electrode and the cathode. Figs. 2 and 3 show one arrangement in which the glass envelope 1 constitutes the screen for an outside control electrode 2 for the first stage of which the cathode is shown at 3 and the anode at 4. The latter, which serves as control electrode for the second stage, is screened from the cathode 6 of the second stage by a glass plate 5. The anode 7 of the second stage is connected through a condenser 14 to the grid 9 of the third and final stage. The electrode 4 and plate 5 are preferably, however, not flat as shown in Figs. 2 and 3, but of egg-end form or of V-section with rounded end as shown in Fig. 4. Fig. 1 shows diagrammatically the circuit arrangements with input terminals at A, G and with the terminals of the anode circuit connected to a loud-speaker at L. The cathode filaments K1, K2 of the first two stages are connected in parallel and the two filaments K3 of the third stage are connected in series in the circuit of the heating current, e.g. A.C. of 4 volts, from terminals H. The anode potential Ea is supplied to the anodes of the first two stages through resistances Ral, Ra2 and a negative bias is applied to the control! electrode of the third stage through a resistance Rg of, for example, 5 Î 10<5> ohms.
Patent GB-514022-A (GB)
Title: A machine for grinding the crank pins of crankshafts
IPC: F16K15/06
Filed: 1938-08-29
Abstract: 514,022. Grinding crank pins. MAYER, C., and NOLLE, R. Aug. 29, 1938, No. 25282. [Class 60] In a machine for grinding the. crank-pins of crank-shafts, the grinding wheel operates with its flat front face, the axis of the wheel being perpendicular to that of the pin, and the crank-shaft is rotatably supported by bearing clamps with its axis vertical. The shaft 9 is guided by clamping-plates in brackets 11, 12 adjustable along a vertical column 1, and the shaft is rotated and supported by a table 3 the spindle of which is slidably keyed in a bush 4 rotated, through worm gearing, by a motor 5, the table being raised and lowered to reciprocate the shaft 9 either by a hand lever 8, linkage 7, and a lever 6, or automatically by an adjustable eccentric. On the bracket 12 is mounted a transverse slide 13 carrying the grinding wheel 16 and its driving motor 14, a measuring gauge 17 also being provided, and in the brackets 11, 12 are mounted respectively slidable bearing-clamps 18, formed at their inner ends with support surfaces 31, 32 against which the crank-pin is retained by a plate 20. In order to avoid the accentuation during grinding of small initial irregularities on the work, the surface 31 is not exactly parallel to the operative face of the grinding wheel, but makes an angle of from 2 degrees to 10 degrees therewith; the surfaces 31, 32 may be replaced by rollers. The lower end of the shaft 9 is supported on a centre 35 slidable radially in the table 3, or when single cranked shafts or shafts not having two pins in line are being treated, by a clamping member slidable on the table. A third work support 33 may be provided.
Patent GB-253442-A (GB)
Abstract: 253,442. Prestwich, J. A. May 25, 1925. Single -. acting suctionvalveless piston pumps; valves, arrangement of.- An oil pump particularly adapted for use with a lubricating device such as is described in Specification 247,805, [Class 12 (iii), Lubricators &c.]. comprises a cylinder a with an inlet port e controlled by the plunger b and a disc delivery valve j which covers the end of the cylinder. The plunger is actuated by a valve tappet &c. of its engine.
Patent GB-247876-A (GB)
Title: Improvements relating to the manufacture of alloys
IPC: C21C7/00
Filed: 1924-11-06
Abstract: 247,876. Stimson, R. W. Nov. 6, 1924. Alloys. - A process for making iron or steel alloys containing one or more of the metals cobalt, copper, chromium, manganese, molybdenum, nickel, titanium, tungsten, uranium, vanadium, and zirconium, comprises the reduction of ores, concentrates, or compounds of the alloying metals, with or without not more than 10 per cent of iron ore or oxide, by means of a non-carbonaceous reducing agent in the presence of a basic flux, and the production of a refined product either by the use of a basic calciumcarbide-containing slag having a carbon content of not more than 2 per cent in the form of calcium carbide, or by incorporating the reduced product in a steel bath containing or made t'o contain an amount of phosphorus which is below that allowable in the final alloy and a total amount of silicon, manganese, and carbon which is above the minimum allowable in the final alloy, or by both methods. The reducing agent may be an iron-silicon alloy containing also a metal or metals to be present in the product. The slag may be made by using lime, carbonaceous material and fluorspar, with or without borax and calcium carbide, further amounts of one or more of the ingredients being added from time to time. The diluent steel bath may be made by melting carbon steel or alloy steel scrap with or without pig iron or other metal in a basic furnace, preferably electric, with basic flux in the presence of manganese ore or oxide with or without titaniferous material. The deoxidation may be completed by additions such as ferromanganese, calcium silicate, ferro-silicon, ferrotitanium, and aluminium, and the molten product may be dead-melted under a neutral or non- oxidizing slag to reduce the amount of gas retained. Specifications 247,634 and 247,635 are referred to.
Patent GB-1218772-A (GB)
Title: Numerical indicating system
Inventor: CORDES EDWARD VALENTINE JR
IPC: H03K21/08
Filed: 1968-05-28
Abstract: 1,218,772. Selective signalling. WARNER & SWASEY CO. 28 May, 1968 [9 June, 1967]., No. 25467/68. Heading G4H. A digit represented by a combination of signals on five leads 20, and a lead odd/even, Fig. 3, is decoded by diode gates to fire one of ten S.C.R.'s 33, 36, which control a glow discharge indicating tube 30. Normally an "erase" terminal 70 is held negative thereby, via off transistor 72 and on transistors 61, 47, preventing any diode decoding gate conducting. When the erase terminal 70 is made positive, earth is immediately applied to the anodes of the S.C.R.'s, thereby extinguishing them, and transistors 61, 47 come under the control of the odd/even input bit allowing the decoded form of the present input to be applied by the diode decoding gates to the S.C.R.'s. No S.C.R. fires, however, until the erase terminal 70 is brought back to its normal negative level, when, because of a capacitor 80, there is a short period during which H.T. is restored to the S.C.R.'s and the diode decoding gates are still operative. Thus, the positive leading edge of an erase pulse applied to terminal 70 extinguishes the S.C.R.'s, and immediately following its negative trailing edge there is a short period during which they are reset with whatever digit is currently applied to the input. The indicating system forms part of a two-dimensional position digitizing system.