baber/WOPTO huggingface dataset:
Patent GB-1204131-A (GB)
Title: Improvements in or relating to gate valves
Inventor: DAVISON GEORGE ROBERT
IPC: F16K3/02
Filed: 1967-01-19
Abstract: 1,204,131. Valves. BRYAN DONKIN CO. Ltd. 4 Jan., 1968 [19 Jan., 1967], No. 2832/67. Heading F2V. In a gate valve, which is adapted to be buried underground and to operate once only so as to facilitate the introduction of natural gas to a gas main, closure of the valve duct 12 is effected by a valve disc 14 co-operating with a seat 16, a pair of inclined surfaces 32 formed on the disc engaging a pair of abutment members 34 to enhance the closure. Upon rotation of a shaft 26, the disc is caused to move away from its seat and into a well 10, such rotary motion of the shaft being converted to linear motion of the disc by means of a non-rotatable nut 28 held captive between a pair of forked members 30 projecting from the disc. When in the well 10 and subsequent to the withdrawal of a plug 38, the disc can be disconnected from the shaft and the latter withdrawn from the valve casing which is then sealed. Dust and the like, collecting in the well and under the disc which, when in the well, rests on flanges (46, Fig. 2, not shown) formed therein, may be removed through a removable plug 48. The disc and seat are so formed as to permit their introduction into the valve through the duct 12, the arrangement serving to minimize the valve size.
Patent GB-1505732-A (GB)
Title: Welding
IPC: B23K9/028
Filed: 1976-01-22
Abstract: 1505732 Welding by fusion FOSTER WHEELER POWER PRODUCTS Ltd 22 Jan 1976 [22 Jan 1975] 2845/75 Heading B3R [Also in Division H2] In tube/tube or tube/tube plate orbital arc welding, current is fed to a rotary welding head via a feeder 14, a ring of contact members 8 strapped around a workpiece 2 and electrically connected together by said feeder 14, and at least one spring-biased carbon brush 16 connected to the welding head and arranged to successively contact the members 8. As shown, each contact member 8, e.g. of brass, is connected to a feeder-gripping spring clip 12 and carried by one of a plurality of blocks 6 which are of insulating material and are arranged to be fastened around the workpiece by a belt 24, e.g. of leather, passing through block holes 26 and by a cam-toggle-fastened steel strap (Fig. 4, not shown). Brushes 16 are housed in an arcuate holder 18 which together with the welding head (not shown) is rotatable about the workpiece. In Figs. 5, 6 (not shown), two radially inwardly facing brushes are pivotally connected together and spring-biased into engagement with radially outwardly facing contact members.
Patent GB-896812-A (GB)
Title: Improvements in or relating to extraction of beryllium from beryl ore
Inventor: HYDE KENNETH ROBERT
IPC: C22B35/00
Filed: 1960-01-26
Abstract: Beryllium values are extracted from beryl ore by leaching the ore under a pressure at least that autogeneously generated with an aqueous solution, containing sulphuric acid at a concentration of 0,2 to 5N and hydrofluoric acid at a concentration of 0,1 to 0,5N, at a temperature of at least 200 DEG C. but below the critical temperature of the aqueous solution.  The hydrogen fluoride may be formed in situ in the solution by adding thereto a compound which forms fluoride ions in solution, e.g. a fluoride salt.
Patent GB-723990-A (GB)
Title: Improvements in and relating to frequency meters
Inventor: MELVILLE WILLIAM SIMM
IPC: G01R23/02
Filed: 1952-02-04
Abstract: 723,990. Frequency meters. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 27, 1953 [Feb. 4, 1952], No. 2918/52. Class 37. A frequency meter consists of a saturable capacitor D which is charged to saturation and fully discharged every half-cycle through a bridge rectifier circuit R in the diagonal of which is a D.C. meter M indicating the rectified average current through the condenser. Since the saturation charge is independent of frequency and waveform this average current is directly proportional to frequency.
Patent GB-1036541-A (GB)
Title: Rotary engine and rotary valve
IPC: F02B53/00
Filed: 1965-01-22
Abstract: 1,036,541. Gas turbine engines. H. W. BRUTON. Feb. 11, 1965 [Jan. 22, 1965], No. 2944/65. Heading F1G. A rotary internal combustion engine comprises a rotor of spherical form with two recesses formed in its surface, a valve member also of spherical form with a single recess formed in its surface, the rotor and valve member being mounted for rotation in spherical chambers formed in a stator casing and being interconnected by gearing, one of the recesses in the rotor co-operating with a combustion chamber recess formed in the wall of the associated spherical chamber wherein combustible mixture supplied through the rotary valve member is fired, the resulting gases acting to drive the rotor. The rotor and the rotary valve member are provided with sealing rings to prevent leakage of gas.
Patent GB-455916-A (GB)
Title: Improvements relating to the waving of hair
IPC: A45D4/06
Filed: 1935-01-29
Abstract: 455,916. Electric hair - waving appliances. LOHLE, J. B., 1, Park Grove, Edgware, Middlesex. Jan. 29, 1935, No. 2964. [Class 39 (iii)] An apparatus for per manent hair waving consists of an electro lytic cell of known type comprising a rigid outer tube 1, a concentric inner tube 2 with a layer of absorbent material 5 between the two tubes, the inner tube forming a closed vapour space for receiving a hair tress 3 wound on a curler rod 4, the cell being adapted for use by the impreg. nation of the absorbent layer with a salt solution and being connected in a low voltage alternating current circuit. The outer tube may be of metal, e.g. aluminium, or it may be formed as a metal lining or connected longitudinal strips moulded in a thermo-plastic substance and the inner tube may be a metal, e.g. aluminium perforated or solid cylinder, or formed from a spirally wound strip. The hair tress may be impregnated with a setting lotion such as sodium sulphite or ammonium carbonate or it may be wrapped in a piece of impregnated felt or flannel. The layer 5 in this case is impregnated with a solution serving merely as an electrolyte, e.g. common salt, and the inner tube may be imperforate. Alternatively, the absorbent layer may be impregnated with a solution acting both as an electrolyte and as a setting lotion. The tress of hair, before winding on the curler rod is passed through an aperture in an insulating cap 6, and the lower part 6a of the cap is sealed by a clamp. The cap may be dispensed with by the use of fabric cover for the apparatus having a lower skirt portion which can be pleated to form a part such as 6a. An upper insulating cap M is perforated for the escape of vapour. An external heat insulating layer may be applied over the outer shell. No voltage substantially higher than 20 volts is intended to be used with the apparatus and preferably the voltage does not exceed 3À5. Specifications 433,290 and 433,351 are referred to.
Patent GB-1399321-A (GB)
Title: Induction heating
IPC: H05B6/40
Filed: 1973-01-19
Abstract: 1399321 Induction heating PARK-OHIO INDUSTRIES Inc 19 Jan 1973 [27 March 1972] 2977/73 Heading H5H In induction heating apparatus for conical valve seats of the type disclosed in copending Specification 1,387,751 a detector is provided to ensure that when the carrier supporting the heating inductors 20, 22 is moved towards the engine blocks, the inductors engage their respective valve seats B, C and when the carrier has been retracted to set the desired air gap between the inductors and the valve seats, the inductors are all disengaged from their valve seats. Identical detector circuits 70, 72 are provided for the inductors. Each detector circuit comprises a transformer primary winding, e.g. 210 series connected to a relay coil 232 and a supply 230, and a secondary winding 214, one side of which is earthed, and the other side of which is connected to the inductor 20. When the inductor 20 physically engages the valve seat B which is earthed, the impedance of the secondary circuit is reduced thereby reducing the imped ance of the primary circuit sufficiently to energize relay 323. This energization of relay 232 causes illumination of indicator lamp 240, and energization of a clamp circuit 244 which locks the inductor 20 to the carrier. When all the inductors contact their respective valve seats the retract control 250 is energized to space the inductors a desired distance from their valve seats. During the retracting movement of the carrier the detectors are de-energized. When the carrier is in its retracted position the detectors 70, 72 are again energized and should one of the inductors still be in contact with its valve seat, due for example to a faulty clamp, one of the inductor lamps is illuminated and the commencement of the heating cycle is prevented.
Patent GB-839637-A (GB)
Title: Improvements in operating mechanisms for steam turbine regulating valves
IPC: F01D17/26
Filed: 1956-10-02
Abstract: 839,637. Fluid-pressure servomotor-control systems. PRVNI BRNENSKA STROJIRNA ZAVODY KLEMENTA GOTTWALDA NARODNI PODNIK. Oct. 2, 1956 [Oct. 8, 1955], No. 29999/56. Class 135. An operating mechanism for a steam turbine steam-regulating valve 3 comprises a servomotor 1 having a control valve member 4 biased in one sense by an applied control pressure 27, generated in accordance with turbine speed; position-sensitive means 30 adapted to bias the control valve member in the opposite sense with a variable force determined by the positioning of an output member 5 of the servomotor; means such as beam 2, connecting the servomotor output member to the steam-regulating valve and a device 6 associated with the position sensitive means adapted to rerder the changes in the variable force stepwise in nature. The device comprises a cam having a grooved track 29, alternative means comprise a gear sector pivoted at its centre and to the member 5 and engaging a gear-wheel fitted with a grooved cam which in turn engages the member 30, or a stepped throttling valve operated by the member 5 and controlling the admission of pressure-nuid to a cylinder housing a piston which applies the variable force.
Patent GB-266881-A (GB)
Title: Improvements in and relating to a combined drawing and measuring apparatus
IPC: B43L13/02
Filed: 1926-02-03
Abstract: 266,881. Williams, E. L. Howard-. Feb. 3, 1926, Squares; protractors.-A drawing and measuring instrument comprises a fixed guide 2 secured to the edge of a board 1 and having a slot 3 in which can move a slide 5. Attached by a pivot 7 to the slide is a frame 6, 6<a> having an integral circular graduated guide 9 with a slot 10 through which passes a stud 11 carried by the slide 5. The member 6<a> is fitted with a detachable graduated ruler &c. 13 which can be secured by a screw 14 and nut 15 passing through a slot 16, a projection 17 on the ruler serving to prevent displacement of the latter. Clamping-nuts 8, 12 are provided for the pivot 7 and stud 11. A spring may be provided within the slot 3 to prevent accidental displacement of the frame 6. A second instrument, similar to that described, may be provided on the adjacent edge of the board.
Patent GB-846417-A (GB)
Title: Improvements in or relating to hydraulic apparatus for producing reciprocatory motion
IPC: D21F1/32
Filed: 1958-01-30
Abstract: 846,417. Spraying felts of paper-making machines. LARNER, D. A., and BALDWIN INSTRUMENT CO. Ltd. April 30, 1959 [Jan. 30, 1958], No. 3193/58. Class 96. [Also in Group XXIX] A spray for washing supporting felt during the manufacture of paper is reciprocated by a piston P in a cylinder HC which at one end OE is supplied at a constant liquid pressure, the other end IE being alternately connected to an outlet 107 and a source of liquid pressure. The liquid supplied to the end IE passes through radial holes to the inside of the piston-rod which may be provided with nozzles to form the jets of the spray. Alternatively, the rod may be attached to an extension provided with the nozzles.
Patent GB-1099545-A (GB)
Title: Cathode ray tubes of the line-screen beam-indexing variety
Inventor: SAULNIER THEODORE ALEXANDER
IPC: H01J9/227
Filed: 1965-01-25
Abstract: The phosphor screen of a colour television tube, see Division H1, comprises a light-reflecting metallic layer formed with a multiplicity of thread-like cracks or minute holes therethrough such that 10-25% of incident light is transmitted.  Cracks or holes need only be formed in strip-like sections of the layer. The layer may be formed by evaporating aluminium, to a thickness of 500 to 5000 <\>rA, on to crazed volatizable substrate formed by applying a coating of a water-based resin emulsion over the phosphor screen and drying at a temperature below the film-forming temperature of the coating material. Alternatively, aluminium may be evaporated on to a film comprising a binder having dispersed therein particles of a material which will volatilize at a temperature lower than the binder material.  During bake-out at a controlled rate of heating, these particles decompose and blow out a large number of small holes in the aluminium layer before further heating removes the binder. Specific examples are given.
Patent GB-588326-A (GB)
Title: Improvements in or relating to explosive cartridges for plaster shooting
IPC: F42B3/00
Filed: 1945-02-09
Abstract: 588,326. Blasting cartridges. DAVIDSON, S. H., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Feb. 9, 1945, No. 3277. [Class 9 (i)] A blasting cartridge for breaking boulders comprises a cylindrical, plastic explosive charge 5 capable of developing high velocity -detonation, at one end of which is a rigid wooden cylinder 1 to serve as a hand grip and enclose high-velocity detonation primer 2 having a hole 4 to contain the detonator, the whole unit being enclosed in an easily rupturable wrapper 7 of waxed paper. Coloured paper 3 indicates the detonator end of the cartridge. The plastic charge 5 is squashed on to the boulder and the wrapper ruptures at perforations 8. The charge 5 may be an explosive based on a solution of nitrocellulose in nitric esters.
Patent GB-713798-A (GB)
Title: Air-blast electric circuit-breaker
IPC: H01H33/32
Filed: 1952-02-08
Abstract: 713,798. Air-blast circuit-breakers. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Feb. 8, 1952 [Feb. 9, 1951], No. 3347/52. Class 38(5)  The breaker contacts 3, 6, are arranged in a metal compressed air tank 1 which is permanently connected to a compressed air source over a narrow pipe 2 and is carried by an insulator 20, the fixed contact 3 being itself insulated from the container. The hollow movable contact 6 is connected to the container and is carried by a piston 7 working in a cylinder 8 and biased to the contactclosed position by a spring 10. The contacts are opened by applying pressure to a pipe 21 so that a disc 24 is raised to change over a valve 26 so as to shut off a pipe 27 and to exhaust the lower face of piston 7 to atmosphere through pipe 28, the pressure on the upper face lowering the piston and contact. At the same time, the pressure in pipes 21 and 22 raises a piston 16 to. open an exhaust valve 12 which acts as a stop for the movable contact. Valve 12 is reclosed by the air supplied to the upper side of piston 16 over a calibrated pipe 29. The contacts are reclosed by exhausting pipe 21, thereby allowing valve 26 to restore and pressure to be applied to the lower side of piston 7 via pipes 27 and 28. Similarly, both sides of piston 16 are exhausted over pipe 22 and a valve 31.
Patent GB-216912-A (GB)
Title: Improvements in resonators for loud speaking telephones
IPC: H04R1/28
Filed: 1923-02-05
Abstract: 216,912. Empson, F. J. Feb. 5, 1923. Sound magnifying and directing appliances.-A horn or resonator for use in a loud-speaking telephone comprises a series of slightly-tapering shells alternately of wood and of elastic metal.. arranged coaxially so as to form a series of annular passages, the inlet end of one of thewooden shells being contracted by inclined wooden walls, so as to give a shape resembling that of the human mouth. In the example shown, the outer metal shell E is formed with an end plate F containing a rectangular aperture fitted with an inlet tube G. A wooden shell N is spaced from the shell E by diagonal boards 0, and its inner end is contracted to correspond with the area of the inlet tube G by means of two inclined side boards P and an upper board Q. An inner metal shell R is supported by spacing- members S. The outer ends of the annular spaces between the shells E, N, R are partly covered by a perforated frame T. The whole structure may be contained within a casing A provided on some or all of its inner faces with convex sounding boards B which serve to insulate the shells from extraneous noises. Hard sheet brass or phosphor-bronze may be used for the metal shells, and straight grained wood such as Swiss pine for the wooden shells. A sound-controlling valve comprising one or more velvet-covered metal plates or gates operated electrically, mechanically or pneumatically, may be provided. In a modification, the inlet tube G may be straight and coaxial with the shells.
Patent GB-104229-A (GB)
Title: Improvements in and relating to Alternating Current Electromagnets.
IPC: H01F7/12
Filed: 1916-03-07
Abstract: 104,229. Waygood-Otis, Ltd., (Otis Elevator Co.). March 7, 1916. Electric and magnetic.-The laminated cores 10 of an alternating-current electro-magnet having primary and secondary windings are secured to dash-pot controlled arms 9 pivoted at 23 and connected by adjustable links 8 to the brake levers 3 pivoted at 4. The brake shoes 2 are normally forced against the brake pulley 1 by springs 7. The secondary conductor 12 consists of a rectangular strip of copper, brass, or other suitable metal secured at each end to the metal frame of the magnet by screws.
Patent GB-724930-A (GB)
Title: Manufacture of signal translating devices including silicon bodies
IPC: H01L29/43
Filed: 1953-02-06
Abstract: 724,930. Semi-conductive devices. WESTERN ELECTRIC CO., Inc. Feb. 6, 1953 [Feb. 7, 1952], No. 3401/53. Class 37. [Also in Group XXII] A method of adding to a block of silicon two conductors capable of forming an eutectic with the silicon, one conductor forming a rectifying junction with the silicon, comprises flash heating the assembly of silicon and conductors so that they alloy at the regions of contact. Preferably the silicon is of one conductivity type, and the connecter forming the rectifying region produces a region of the opposite conductivity type in the silicon. As shown, a block of N-type silicon 22 (Fig. 2) is placed on a sheet of gold 23, and an aluminium wire 18 has one end resting on its surface. The assembly is located on a metal filament heater 14 held between clips 13 (Fig. 1) and is flash heated by passing a heavy current through the heater 14 for a short time controlled by timer 21, whereupon the connectors 18, 23 alloy at the regions of contact, the aluminium wire 18 forming a P-type region in the silicon 22. An inert gas is maintained about the assembly by appropriate jets 19. The silicon block 22 is etched before and after treatment, and then dipped in wax to provide a protective coating. In modifications the gold conductor 23 may also be a wire, and both wire conductors 18, 23 may be assembled on the same side of the silicon 22 simultaneously, or on opposite sides by first adding the aluminium wire 18 at a temperature of approximately 650 C., and then adding the gold wire 23 at a temperature of approximately 370 C. The gold may be mixed with donor impurities, e.g. antimony, arsenic, phosphorus, which do not form an eutectic with silicon, to avoid converting the block to P-type.
Patent GB-1010125-A (GB)
Title: Carbene modified polymers
IPC: C08C19/00
Filed: 1964-01-27
Abstract: The invention comprises the reaction product of a polymer containing carbon-to-carbon unsaturation and a carbene of the general formula C7172 wherein 71 and 72 are radicals selected from the group consisting of hydrogen, chlorine, bromine, iodine, fluorine, carboxyl, cyano, alkyl, aralkyl, cycloalkyl, aryl, acyl, aroyl, substituted alkyl, substituted aralkyl, substituted aryl, substituted acyl, substituted aroyl and ester such as -COOR wherein R may be an aliphatic substituted aliphatic, aromatic and substituted aromatic radicals. Specified polymers containing carbon-to-carbon unsaturation are the addition polymers of diolefins, natural rubber, gutta percha, balata, polyesters prepared by the condensation of a diol and a di-acid, at least one of which contains carbon-to-carbon unsaturation, polyamides prepared by the condensation of a diamide and a di-acid, at least one of which contains carbon-to-carbon unsaturation, polymethanes prepared by the condensation of a di-isocyanate and a diol, at least one of which contains carbon-to-carbon unsaturation, and polycarbonates prepared by the condensation of a diol containing carbon-to-carbon unsaturation and phosgene.  The reaction preferably takes place in an organic solvent, the carbene being produced in situ, e.g. dichlorocarbene is produced by reacting chloroform with potassium a -butoxide.
Patent GB-978309-A (GB)
Title: Hydrostatic vehicle drive systems
IPC: F16H61/46
Filed: 1963-01-29
Abstract: 978,309. Hydraulic transmission of power; change-speed control. GAR WOOD INDUSTRIES Inc. Jan. 29, 1963 [Jan. 29, 1962], No. 3567/63. Headings F2C and F2D. A hydrostatic drive system for a vehicle comprises an engine-driven, variable-displacement pump the output from which, under the control of a main valve, is fed to independent motor and control means associated with each road wheel, and each control means includes elements for sensing the load on the associated road wheel and controlling the displacement of the motor to prevent loss of pressure in the system should one motor spin as a result of losing its grip. The load-sensing elements may be responsive to the torque exerted by a wheel, to a combination of the weight carried by a wheel and the hydraulic pressure supplied, or, as shown, to a combination of the weight and torque. The motor 28 for one of the wheels is energized from conduits 44, 46 either of which may be the supply conduit depending on the direction of rotation, and a valve 136 automatically connects the conduit at the higher pressure with a conduit 140 leading to a servopiston 52, a piston 54 of smaller area, and the loadsensing elements 16, 18. The pistons 52, 54 act in opposition on a lever 50 which adjusts the tilt plate to vary the displacement of the motor. The sensing-elements 16, 18 support the wheel and motor and contain pistons 20, 22 and valving-elements whereby pressures dependent upon the weight carried by the wheel are established in chambers 82, 64. Under conditions of zero torque these pressures are equal and that in the chamber 82 is communicated by a spring-loaded valve 104 to a chamber 123 containing a spring-load piston 120. When the wheel is transmitting torque the valve 104 automatically transmits the higher of the pressures in the chambers 82, 64 to the chamber 123. The piston 120 actuates a valve 130 which determines the position of the servopiston 52 so that the motor is adjusted to maximum displacement to provide maximum torque during acceleration until the full delivery of the pump is being used by the motors whereafter the torque will decrease and the motors will be automatically adjusted to smaller displacements to increase speed further. Should a wheel lose contact with the ground or tend to spin for any other reason the pressure transmitted to the piston 120 will be reduced causing the associated motor to be adjusted towards its zero displacement condition.