baber/WOPTO huggingface dataset:
Patent GB-1221931-A (GB)
Title: Fuel control systems for gas turbine engines
Inventor: WARNE EUGENE HAROLD
Filed: 1967-02-16
Abstract: 1,221,931. Gas turbine engine fuel systems. JOSEPH LUCAS (INDUSTRIES) Ltd. April 29, 1968 [Feb.16, 1967], No.7500/67. Heading F1G. A fuel control system for a gas turbine engine comprises a fuel pump, a fuel line between the pump and the engine, there being fuel control apparatus in the fuel line. A spill passage is provided for the return of fuel delivered by the pump in excess of that required by the engine, there being a spill valve in the spill passage, the position of the valve being determined by the pressure difference across the fuel control apparatus. A further spill valve is associated with the spill passage, the further spill valve affording further return of fuel and being responsive to changes of one or more parameters related to engine running conditions. In the embodiment, fuel passes from a backing pump 11 to a positive displacement main fuel pump 10 which supplies fuel through line 12, the fuel passing through a fuel control apparatus 13 and thence through line 14 to the main burners, a shut-off cock 15 being disposed in the line 14. Fuel from the pump 10 also passes through a line 16 to the line 14, a linking valve 17 being disposed in the line 16 so that the pressures in the lines 14 and 16 are equalized but the proportions of fuel passing through the lines 14 and 16 are dependent upon the sizes of restrictors 18 and 19 in the lines 14 and 16 respectively. A spill valve 20 is connected to the line 12 and is arranged to allow excess fuel to pass back through line 21 to the inlet side of the backing pump 11, the spring-loaded valve member of the spill valve being controlled by the pressure drop across the fuel control apparatus 13. An auxiliary spill valve is connected to the line 12 upstream of the spill valve 20, the auxiliary spill valve being controlled by the pressure difference across a variable restrictor 29a, the pressures upstream and downstream of which are communicated to the valve 25 through lines 27, 28, the valve 25 allowing fuel from line 12 to spill through lines 26 and 21 back to the suction side of the backing pump 11. The position of the variable restrictor 29a is controlled within limits set by stops 32 in response to three engine operating parameters viz. a first shaft speed, a second shaft speed and temperature, the signals of which are passed through amplifier 33 to actuator 31. The restrictor 29a is disposed in a passage which is in parallel with a portion of line 12 in which a fixed restriction 34 is disposed. A pressure relief valve 23 is disposed in a line 22 connected at the discharge side of the main fuel pump.
Patent GB-549421-A (GB)
Title: Improvements in or relating to relays for protecting electric circuits
IPC: H01H83/12
Filed: 1941-06-13
Abstract: 549,421. Automatic circuit-breakers ; electromagnetic switches. WEST & CO.. Ltd., A., and PAVITT, F. J. June 13, 1941, No. 7511. [Class 38 (v)] A protective device for an electric circuit comprises a simple winding operating both as overload and underload coil. As applied to a polyphase circuit supplying a motor, the starter of which embodies a coil 1 placed in each phase the starter is operated by closure of a pushbutton which energizes an electromagnetic switch, the electromagnet winding being adapted to be de-energized by a stop button or by contacts operated by the protective device. In Fig. 4, the operating magnet comprises cooperating fixed and movable E-shaped frames 31, 32, the latter being linked at 33 to a carrier 28 having an insulating loop 46 for each phase in which is mounted the movable contact-bridge 2 controlled by a spring 29. Each trip coil 1 is wound on a moulded insulating bobbin 38 in which is a core 15 receiving trip pin 12 which may be lifted by the rising of an overload plunger 11 with anti-stiction ring 16. A no-volt plate-armature 9 normally held flush against the core 15, is bifurcated to receive the pin 12 and, when released, raises the pin by means of its shouldered head 14. One bifurcation carries a copper silencing ring 17, and the plate is pivoted as a whole in an aperture in a magnet yoke plate 19. Also pivoted to the latter is a trip plate 22 which spreads over the pins 12 of all the phases and has a projection 23, Fig. 2, for separating contacts 8 in the circuit of holding winding 7. When the starter is inoperative, the trip plate 22 is held down, against the action of underload springs 10, by a pair of levers 25 which are pivoted at 26 and controlled by springs. When the starter closes, the continued movement of carrier 28, as permitted by springs 29, brings projections 30, Fig. 2, into engagement with, and lifts, the levers 25, so placing the plate 22 solely under control of the windings 1. One lever 25 also carries a contact 36, Fig. 2, which makes a maintaining circuit for the winding 7 alternative to the start button. The contacts 8 may alternatively be latched closed and unlatched by tripping plate 22, in which case the relatching member could have a further position to which it could be depressed for opening the starterwinding circuit. The contacts of the phases are shrouded by partitions 45 formed in the insulating frame. The time-lag device on the plunger 11 is as described in Specification 480,805, [Group XXXII]. Specification 461,900 also is referred to.
Patent GB-834955-A (GB)
Title: Snap action electric switch actuating mechanism
IPC: H01H35/00
Filed: 1958-03-10
Abstract: 834,955. Electric indicating systems. GILBERT & BARKER MANUFACTURING CO. March 10, 1958 [April 3, 1957], No. 7556/58. Class 40 (1). [Also in Groups XIX and XXXVII] A liquid level-sensing apparatus having a servomotor as in Specification 750,858 is combined with an arrangement for indicating the temperature of the apparatus. Thus a number of temperature-sensitive resistances 16 of equal value but of different lengths extend upwards from the bottom of the liquid container, being selectively switched into circuit with a battery 18 and meter 17 by a switch 22, 23 (see Group XXXVII), which is operated by the servomotor so that the longest totally-immersed resistance is in circuit.
Patent GB-841182-A (GB)
Title: An improved girdle or like article of underwear for women
Inventor: BRIGHAM DENIS MONTAGUE
IPC: A41C1/08
Filed: 1958-03-10
Abstract: 841,182. Corsets. LEETHEMS (TWILFIT) Ltd. Feb. 2, 1959 [March 10, 1958], No. 7580/58. Class 141 A foundation garment comprises an elastic girdle provided internally at the front with a loose, vertically stretchable, elastic panel 1 attached to the front of the girdle only at its upper and lower edge. The upper side edges 1a of the panel are secured indirectly to the side seams 4 by obliquely disposed elastic strips 5 which may be extended around the back of the girdle adjacent the upper edge, being connected to the girdle only at the side seams and at the centre of the back.
Patent GB-1493312-A (GB)
Title: Receiver tuning circuit
IPC: H03J7/26
Filed: 1975-02-24
Abstract: 1493312 Tuning radio receivers PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 24 Feb 1975 [27 Feb 1974] 7619/75 Heading H3Q A receiver tuning circuit 1 is tuned by a voltage obtained from a capacitor 23 whose charge can be changed by a current source 25 controlled by an automatic tuning correction signal from 15 and by a desired tuning voltage temporarily applied to the capacitor by means of a switch 59 coupled to a tap of a potentiometer 267 which is adjustable by a motor 301. When the field strength of a received signal is too small as detected by amplitude detector 19 a gate 315 closes the switch 59. The output at 83 of the switch controls switches 33 and 303 so that the automatic tuning signal from 15 and the motor 301 are deactuated. The tuning voltage at the capacitor 23 therefore has the value corresponding to the last found station as stored by the setting of the potentiometer 267. By actuation of a station finder 41 the gate 317 operates to open switch 59 and the switch 303 is closed until the desired station is tuned in and the station finding action is stopped by an output from signal detector 15 applied via a delay circuit 53. The motor 301 adjusts the potentiometer 267 to the new station under control by a difference amplifier 307. The gate 317 and switch can be formed of a transistor circuit (Fig. 2, not shown) which can be in integrated form. A capacitor (231) functions as a delay circuit when the receiver supply from 91 is switched on to cause the switch 59 constituted by transistors (201, 205 and 211) to conduct for the delay time so as to connect the capacitor 23 to the voltage stored on the potentiometer corresponding to the last station tuned to.
Patent GB-1459855-A (GB)
Title: Video transmitter stabilization system
IPC: H04N17/00
Filed: 1974-02-20
Abstract: 1459855 Amplitude modulation TEKTRONIX Inc 20 Feb 1974 [22 March 1973] 7661/74 Heading H3R In a television transmitter a reference signal is added to the video signal and components of this and/or the video signal are compared with the signal after detection to provide signals for pre-correcting the video signal transmitted. An adding circuit 7, Fig. 3, adds to the composite video signal a vertical interval reference signal (VIRS) representing the levels of various components of the composite signal as shown in Fig. 2, to a particular line during the vertical interval. The modified signal is applied via a processing amplifier to modulate a transmitter 2, the output from which is applied over directional coupler 3 to aerial 4. A part of the output is applied to demodulator 5 which feeds indicator, e.g. an oscilloscope and also automatic gain control circuit 8, which supplies control voltages a-f to processing amplifier 1, and also a reference pulse via a line to demodulator 5. In the automatic gain control circuit, the demodulated video with superimposed zero carrier reference signal applied to terminal 9, Fig. 4 is passed over capacitor 10 and the D.C. level restored by back porch clamp 12, operated by sync. separator 11. The luminance component of VIRS is then fed directly to a number of gates 18, while the chrominance components are separated out by means of band pass filter 15 and applied to phase and amplitude decoders 17, 16 respectively, the outputs from which are applied to a burst phase gate and a chroma gate respectively. The output from sync. separator 11 is used to synchronise a first timing circuit 14<SP>1</SP> which operates a zero carrier gate and also supplies a zero carrier reference drive pulse via terminal 13 to the demodulator 5, Fig. 3. The output from sync. separator 11 also synchronises a second timing circuit 14 which provides gating pulses for the remaining gates. The output from each gate is stored on a corresponding memory capacitor and applied, except in the case of the zero carrier gate to one input of a corresponding comparator. The output from the zero carrier gate forms the input to a potentiometer g-j the tapping points of which provide voltages corresponding to the various correct signal levels : the voltages from the second inputs to the corresponding comparators, excepting the phase burst comparator, the second input to which comprises a fixed D.C. voltage. The outputs from the comparators comprise the gain control voltages a-f applied to the automatic gain control circuit 8, Fig. 3. The specification also describes an alternative comparator arrangement (Fig. 5, not shown).
Patent GB-1255035-A (GB)
Title: Preparation of penicillanic acids
Inventor: HARDY KENNETH DAVID
IPC: C07D499/42
Filed: 1969-02-13
Abstract: 1,255,035. Preparing penicillanic acids. BEECHAM GROUP Ltd. 5 Feb., 1970 [13 Feb., 1969], No. 7756/69. Heading C2A. Penicillanic acids of Formula  or salts thereof, are prepared by treating a compound of Formula II or its acid addition salt, with an acid acceptor under anhydrous conditions in an organic solvent or mixture of organic solvents, X being a hydrogen atom or an acyl group and R being an alkyl, aryl or heterocyclic group. The acid acceptor may be a source of alkali metal ions or a tertiary amine and is preferably used in at least one molecular proportion of the compound of Formula II. A nucleophile, e.g. a thiol, a thiocyanate ion or an iodide ion, is preferably also present in the reaction and the acid acceptor and nucleophile may be added as a single compound, e.g. sodium thiophenoxide. Typical solvents are acetone and dimethylformamide.
Patent GB-899793-A (GB)
Title: Improvements in and relating to furnaces
Inventor: WEBB LESLIE WILLIAM
IPC: F27D3/04
Filed: 1960-03-04
Abstract: 899,793. Heat-treatment furnaces. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 27, 1961 [March 4, 1960], No. 7795/60. Class 51 (2). A heat-treatment furnace comprises a treatment chamber 1 with a bottom opening 2 through which a charge basket 7 on a platform 8 moves vertically, the platform being rotatable about a vertical axis to deposit the basket on fixed supports 20. A fan 6 circulates atmosphere gas over electric or fuel-fired heating elements, Fig. 2 (not shown). A thermallyinsulated roller door 4 separates chamber 1 from a charging and purging vestibule 3 which is above and integral with a quench tank 14 containing a motor-driven agitator 16 under a topplate 17, heating or cooling coils 18 and a duct 19 by which quenchant, driven by the agitator through the coils is discharged through basket 7. The platform 8 is rotatably mounted by a spindle 9 in bearings 10 on an elevator bracket running in a vertical track outside the furnace. Each basket is passed through a sliding door 22 over a roller table 21 on to the platform 8 in the charging and purging vestibule and the platform is then raised into the treatment chamber 1, rotated and lowered to deposit the basket on supports 20.
Patent GB-625192-A (GB)
Title: Improvements in or relating to the carburisation of steel
IPC: C23C8/46
Filed: 1947-03-21
Abstract: A process for the carburization of steel articles comprises immersing the articles in a molten salt bath at 815 DEG -1010 DEG C. which bath contains, by weight, 5-40 per cent alkali metal cyanides, 1-20 per cent of an oxygen compound of boron or silicon which is more acid than any alkali metal carbonate, at least one mole of alkali metal carbonate for each mole of oxygen compound, and 1-15 per cent of finely divided carbon dispersed in the bath, the balance being alkali metal carbonates with or without alkali metal halide.  Boron oxide, silicon or alkali metal borates or silicates may be added.  As an example for working at 843 DEG C. the bath may p  contain (quantities by weight) sodium cyanide 33 1/3 per cent, sodium carbonate 33 1/3 per cent, sodium chloride 33 1/3 per cent to which is added 1-15 per cent of finely divided graphite dispersed in the bath and sufficient excess to produce a layer 1/4 -inch thick on the surface and 5 per cent of the bath weight of boric acid anhydride.
Patent GB-1292263-A (GB)
Title: Dentifrice composition
Inventor: COLLINGE JOAN
IPC: A61Q11/00
Filed: 1970-02-18
Abstract: 1292263 Dentifrice COLGATE - PALMOLIVE CO 18 Feb 1970 7809/70 Heading A5B A dentifrice composition comprises (a) 20-75% by weight of a water-insoluble polishing material which consists of or includes an alkaline earth metal carbonate, (b) a water - soluble monofluorophosphate or monofluoropolyphosphate in an amount which provides 0.01-1% by weight of fluorine to the dentifrice and' (c) a flavouring material which consists of or includes chloroform in an amount such that there is 0.01-5% by weight of chlorofrom in the composition. Other conventional agents and flavouring materials may be present and suitable compounds are specified. The compositions may also contain wetting agents and antibacterial agents.
Patent GB-1487138-A (GB)
Title: Construction of steel re-inforced concrete columns
IPC: E04G17/14
Filed: 1976-02-24
Abstract: 1487138 Fixing column shuttering in position W KENNY and PEM KENNY 24 Feb 1976 [25 Feb 1975] 7827/75 Heading E1S Column shuttering locators 3, 7 are clamped rigidly to starter bars 1 to avoid the necessity for kickers. The locators extend upwardly and are flat or of angle shape. In the embodiment shown, threaded studs 4 are fastened by, e.g. welding, to one face of each locator and carry clamping straps 5. The studs are arranged off-centre in an upright sense, to allow overlap of studs of adjacent locators, as shown. If angle plates were used at each corner of a column , the studs could be centrally located.
Patent GB-284493-A (GB)
Title: Wheels for vehicles
IPC: F16B21/16
Filed: 1927-03-22
Abstract: 284,493. Ford, R. C. March 22, 1927. Hubs.-Detachable wheels are secured to axles by loose balls c carried by the hub and adapted to enter a recess in the axle and be retained therein by means 'of a spring clip d, which is locked in position by a toggle d<1>, d<3>. In a modification, the clip is locked by a lever portion d<1> pivoted at one end of the clip and springing over the other end d<6> of the clip. The outer end of the hub is closed by a cap b<6>, and the hub is formed with hardened internal sleeves b<1> leaving a lubricating channel a at the centre of the hub.
Patent GB-572513-A (GB)
Title: Improvements in reciprocating pumps especially for the central lubrication of machinery and vehicles
IPC: F16N13/06
Filed: 1943-05-17
Abstract: 572,513. Reciprocating pumps. TECALEMIT, Ltd., and LE CLAIR, C. C. S. May 17, 1943, No. 7850. [Class 102 (i)] A lubricating or other reciprocating pump comprises one or more cylinders each containing a piston which performs slow suction strokes and quick discharge strokes and/or in which a delay is imposed between the discharge and suction strokes Each plunger 84 is driven against a return spring 85 by an electromagnet 81 which is provided with a make-and-break device operated by a rotatable control member, which receives its motion from a driving or driven part o: a vehicle or machine. Ir the form shown, a flexible shaft drives a cam shaft 1 through a worm 79 and worm wheel 78. The can. 77 is circular except for a raised part 86 which co-operates with a fixed contact 82 connected to the cam through an electric supply source and the winding of the magnet 81. The magnet core 83 has a tailpiece 83A to engage the head of the plunger 84. Specifications 389,717, 432,235, 567,037, 567,044, [Group XXIX], and 567,644 are referred to.
Patent GB-972385-A (GB)
Title: Improvements in or relating to electron discharge devices
IPC: H01J19/38
Filed: 1961-03-03
Abstract: 972,385. Thermionic valves. STANDARD TELEPHONES & CABLES Ltd. March 3, 1961 [March 9, 1960], No. 7860/61. Heading H1D. A frame grid for use in a coaxial electrode structure comprises at least two metal side rods 7, Fig. 5, held in close fitting apertures or slots in metal cross-struts 8 provided adjacent the ends of the rods 7, and a tensioned winding of wire, having a diameter of the order of 0.001 inch or less, between the cross-struts. The cross-struts may be shaped as shown in any of Figs. 1, 3, 4, 5 and 7, the side-rods being held in the slots or apertures by resilience of the cross-struts or being welded, soldered or brazed thereto. The cross-struts may be built up from sheet metal members bonded together or may have upturned longitudinal edges to provide the necessary rigidity. The central portions of the cross-struts may be bowed outwards towards the ends of the side rods, and may be provided with projections 21, Fig. 7, to assist in locating the grid when it is inserted through an insulating support and to ensure long leakage paths across the support. During manufacture, a plurality of grids may be formed round continuous rods which are subsequently severed to form side rods of individual grids, the wire at the ends of each winding being secured to projections on the cross-struts or wedged between the side-rods and the slots in the crossstruts.
Patent GB-717185-A (GB)
Title: Ignition device for rocket motors
IPC: F42C19/12
Filed: 1952-03-27
Abstract: 717,185. Rocket motors. S.E.R.A.M. SOC. D'ETUDES DE RECHERCHES ET D'APPLICATIONS MECHANIQUES. March 27, 1952 [April 10, 1951], No. 7882/52. Class 9(2) Rocket motor comprises a cylindrical casing 2 containing a propellant 1 of cruciform cross-section held in position by wedges 3, 3<SP>1</SP> and bearing against an ignition device 4 placed at the end of the casing remote from the nozzle. The device 4 consists of a cup-shaped metal member 5 forced into a cover 7 having a bent-over edge 8 which is forced into the casing, thus forming an obturator for the propellent gases. The cup 5, which bears against the propellant, is provided with flash-holes 6, 6<SP>1</SP>, 6<SP>11</SP>, 6<SP>111</SP> aligned with the recesses in the propellant. Within the device 4 are two electric igniters 9, 9<SP>1</SP> embedded in an ignition charge filling the device. A metal bracket 10 welded to the cup 5 carries two tubes 12, 12<SP>1</SP> through which the lead wires 13, 13<SP>1</SP> are carried to openings in the bottom of the cup and thence through the casing 2. The flash holes are covered by a varnished gauze 14 to render the device waterproof. Alternatively to the flash-holes fracture lines may be provided, adapted to rupture under the pressure of the gases from the ignition charge.
Patent GB-855728-A (GB)
Title: Air saving arrangement in breathing apparatus for submarine use
IPC: A62B7/04
Filed: 1957-03-11
Abstract: 855,728. Respiratory appliances. LUNDGREN, C. E. G., and ARBORELIUS, M. M. March 11, 1957 [March 12, 1956], No. 7938/57. Class 81(2) Open circuit submarine breathing apparatus in which air is supplied by a demand valve only on inhalation, has an air chamber the maximum volume of which allows receipt on exhalation of the total volume of air in the trachea, mouth and nasal cavity of a normal user, and an exhalation valve loaded so that it opens during exhalation only after the chamber has received the aforesaid maximum volume of air. A mouthpiece 6 is connected to a supply of compressed gas by way of a diaphragm-operated demand valve 3 and an inhalation channel 7 and to an expiration valve 9 by an expiration channel 8. A bladder 10 is connected to the inhalation channel 7. When the bladder 10 is full of gas its pressure loading is higher than the opening pressure of the demand valve 3 so that on inhalation air is inspired from the bladder 10 before the demand valve 3 is opened. The closing pressure of the expiration valve 9 is equal to the pressure loading of the bladder 10 when full so that, on expiration, air first expired fills the bladder 10, further expired air being exhausted by the expiration valve 9. The bladder 10 may be replaced by a chamber in the housing of the demand valve, one side of the chamber being bounded by the diaphragm which operates the demand valve 3 and is extensible. Alternatively the bladder 10 may be replaced by a bellows which operates the demand valve. The expiration valve may be of the duck bill type and subjected to the gas pressure within the bellows. Specification 829,646 is referred to.