baber/WOPTO huggingface dataset:
Patent GB-389849-A (GB)
Title: Means for protecting continuous current to polyphase current conversion systems employing metal vapour valves
IPC: H02M7/51
Filed: 1931-08-17
Abstract: 389,849. Converting ; protective cutout systems. AKT.-GES. BROWN, BOVERI, ET CIE, Baden, Switzerland. Aug. 17, 1931, No. 23117. Convention date, Sept. 2, 1930. [Class 38 (ii).] In an arrangement for supplying a three-phase load circuit 3 from a D.C. source 1 through a grid-controlled mercury arc device 26 in which protection against excess current is afforded by including a valve 27 in the connection to.. the star-point of the primary winding 25 of the main transformer, a condenser 5 being adapted to be switched across the valve to effect interruption of current therein, the switching is effected by an auxiliary arc 9 normally maintained across electrodes 6, 8 by a battery 7 but adapted to be transferred to electrode 9 by electromagnetic means operating in response to load current. The means comprise series and shunt coils 2, 10 in opposition, the latter normally predominating and the former becoming effective to transfer the arc under excess current conditions due to short-circuits or overload on the A.C. side. Thus interruption is instantly effected at the valve 27 and is maintained while the condenser is becoming charged for a sufficient time to permit of the device 26 being rendered inoperative by a negative charge on its grids 11. This condition is brought about by the drop in voltage in the grid transformer 12 which is normally effective to energize the grids 11 of the device 26 through current transformers 15 and valves 14 in opposition to a voltage derived from potentiometers 13. On such voltage drop occurring, the primary circuits of the current transformers are interrupted by the valves 14, whereupon the grids 11 are maintained at a negative voltage corresponding to the drop across a resistance 16 in the exciter circuit of the device 26. Interruption at the valve 27 may be rendered more effective by pre-charging the condenser in a sense opposite to the voltage across the valve. Such precharging is effected by a voltage transformer 19 operating through a valve 18 having a grid normally positively biassed by a battery 22. A switch 24 adapted to close when the condenser is switched across the valve 27 is provided whereby a circuit is closed to produce negative bias on the grid of the valve 18 thus blocking the valve and preventing flow of current in the circuit parallel to the condenser. In a modification, Fig. 2 (not shown), the condenser is adapted to be connected across the main discharge device 26, and the battery circuit 7 for maintaining the 'auxiliary arc is dispensed with, a transformer the primary of which carries the load current being provided whereby in the event of a rapid increase in load current under fault conditions a voltage sufficient to establish the auxiliary arc is produced.
Patent GB-635896-A (GB)
Title: Improvements in or relating to walls and the like
IPC: E04B2/86
Filed: 1946-08-02
Abstract: 635,896. Walls casting walls in situ. BLAKE, J. P. Aug. 2, 1946, No. 23145. [Classes 20 (ii) and 20 (iv)] In walls constructed by casting concrete between facing slabs which form permanent moulds, the slabs are provided with interfitting rebated edges and are held the correct distance apart, whilst the concrete is being cast, by a wooden or metal spacer formed with rebated notches to engage with the top edges of the slabs. After casting, the spacer is removed and used subsequently for successive slabs as these are added. In the form shown, a notched wooden spacer C is first placed over the lowest row of slabs A<SP>1</SP> and A<SP>2</SP> and plain concrete is poured between them to a level D<SP>1</SP>. After this has set the spacer i s removed, another row of slabs A3 and A4 is laid, either dry or in mortar, on the first, so that the rebated edges interfit, and the spacer is used and concrete poured as before. Rows of slabs are added successively to complete the wall, which may then be rendered externally or pointed, when the slabs have a prepared external surface, the inside of the wall being plastered.
Patent GB-725254-A (GB)
Title: Multi-stage centrifugal compressor
IPC: F04D29/44
Filed: 1953-08-21
Abstract: 725,254. Centrifugal compressors. MASCHINENFABRIK OERLIKON. Aug. 21, 1953 [Sept. 4, 1952], No. 23157/53. Class 110 (1). In a multi-stage compressor having at least two volutes and diffusers for each stage, the ratio of the cross-sectional area of the diffuser outlet to that of the diffuser inlet is smaller in the low-pressure stages than in the following stages. For a given angle of widening of the diffusers, the diffusers of the low-pressure stages can thus be made shorter than would otherwise be the case, so that the spacing between the diffusers of a low-pressure stage can be reduced from a to b. A three-stage compressor is described, in which the diffusers have a widening angle of 12 degrees. In the third stage, the velocity at the diffuser outlets is 30 metres per second, but in the first and second stages it is raised to 42 and 37 metres per second respectively to permit their diffusers to be made of the same length as those of the third stage.
Patent GB-1246710-A (GB)
Title: Low force valve
Inventor: WEBER ROBERT LOUIS
IPC: B65D83/14
Filed: 1969-05-06
Abstract: 1,246,710. Dispensing measured quantities of liquids. R. L. WEBER. 6 May, 1969 [19 June, 1968], No. 23167/69. Heading B8N. [Also in Division F1  Pressurized dispensing containers for discharging measured volumes of fluid comprise a valve assembly mounted on a container 31a holding fluid under pressure and comprising a hollow cap 10a having a flexible top portion 14a and a downwardly extending continuous wall, a nozzle 17a associated with said cap, chamber means 34a associated with the nozzle, a centrally located sleeve 22a forming part of the chamber means, a vertically movable hollow stem 18a within the sleeve with clearance therebetween, a cup 13a disposed at the bottom of the cap, and valve 12a supported at the opening of fluid coupling means 28a disposed at the bottom of the cup and normally in sealing contact with the end of the sleeve, whereby pressurized fluid normally fills the annular chamber 1 1a and on depressing the flexible top of the cap the stem moves the valve from sealing contact with the sleeve to fill the chamber means 34a and on releasing the top of the cap stem 18a moves upwards whereby the valve moves into sealing relation with the bottom of the sleeve and pressurized fluid in chamber means 34a passes up stem hollow 18b to the nozzle. In alternative embodiments the stem may be solid, the upper end thereof closing an outlet passage to the nozzle while the flexible top is depressed in contact therewith, and the stem may be free floating or integral with.the valve member 12a.
Patent GB-710834-A (GB)
Title: Improvements in or relating to radio receivers
IPC: H03G3/06
Filed: 1952-09-16
Abstract: 710,834. Radio receiving circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept 16, 1952 [Sept. 19, 1951], No. 23237/52. Class 40 (5) In a receiver for two wavebands, for which separate low-frequency channels are provided, a potentiometer used as volume control in the one channel is switched so as to control the other channel also. For receiving frequency-modulation, a valve 3 acts as an I.F. amplifier being fed from circuit 1 and feeding a discriminator network 4 and valve 5, which is of the multigrid phase-detector type. Demodulated signals appearing in the anode circuit are fed over volume control 8 and switch 9 to output stages and reproducer 11. Amplitude modulated signals in another waveband are switched (by means not shown) to circuit 2 and are rectified by the diode portion of the valve 3. Demodulated signals appearing across the load resistance 14 are fed via resistances 17, 16, 15 to the grid of valve 3, which now functions as a low-frequency amplifier, the output being taken from the screen circuit and fed to output stages and reproducer 18. The devices 11, 18 may have part or all in common. The switch 9 is ganged to the waveband switch so that, on this band, the potentiometer 8 acts as a variable shunt across the resistor 16. Loss of higher audio frequencies caused by condenser 13 is compensated by means of a condenser 19.
Patent GB-1393709-A (GB)
Title: Process for making coloured prints from dyed gelatin printing  plate
IPC: G03C7/25
Filed: 1972-05-17
Abstract: 1393709 Dye transfer in the presence of an amide FUJI PHOTO FILM CO Ltd 17 May 1972 [20 May 1971] 23280/72 Heading G2C A process of colour printing on to the gelatine surface of a receptor sheet which consists of a gelatine layer coated on a support, a mordant for a water-soluble dye being present in the gelatine, comprises wetting the gelatine layer with water or an aqueous solution so as to swell the gelatine, and contacting the swollen gelatine layer with a gelatine printing plate bearing a pattern of a watersoluble dye so as to transfer dye to the mordanted gelatine, the dye transfer being conducted in the presence of (a) a compound of the formula:- where R 1  is H, alkyl, susbstituted alkyl, alkenyl, aryl or substituted aryl; R 2  and R 3  are each H, alkyl, alkyl substituted with OH, carboxyl or aryl, aryl or aryl substituted with alkyl or halogen except that R 3  cannot be carboxyalkyl; and where R 1  and R 2  or R 2  and R 3  may together  form a ring or (b) N, N-diacetone acrylamide or N-vinylpyrrolidone. The compound (a) or (b) may be present in the receptor sheet e.g. in the mordanted gelatine layer or in the support of the sheet, or in the aqueous solution used to swell the gelatine. Multi-colour prints may be made by contacting the same receptor sheet with several printing plates, successively, each being dyed with a different coloured dye. Transfer of the dye is accelerated by the above process.
Patent GB-748807-A (GB)
Title: Improvements in or relating to signal operating systems controlled by the speed of moving vehicles, particularly trains
IPC: B61L3/12
Filed: 1953-08-24
Abstract: 748,807. Electric speed sensing arrangements. BRITISH TRANSPORT COMMISSION, and DELL, R. June 16, 1954 [Aug. 24, 1953], No. 23320/53. Class 40(1) [Also in Group XXX] An arrangement for operating signals in response to the speed of a vehicle, particularly a train, comprises an armature carried by the vehicle, which co-operates with a stationary electromagnetic means to produce therein an A.C. signal in response to passage of the armature of frequency dependent on vehicle speed and a receiver connectd to said means and selectively responsive to the A.C. signal. The means may comprise an arrangement of stationary magnets 15 spaced in the direction of motion and mounted on base 14 of magnetic material, and wound soft, iron cores 17 spaced between them, in which the reluctance of each of the magnetic circuits is varied in turn by the armature 18 to produce an alternating current in the series connected windings 16. The current, the frequency of which depends on the vehicle speed is amplified at 19, and fed to a receiver comprising a frequency filter 21 followed by A.C. relay 22, which therefore responds only when the speed is at a certain value, or within a certain range. The relay may form part of a system in which it is used to ensure that a signal is not cleared unless the speed of an approaching train has been reduced to a predetermined level, or to ensure clearing of a signal when the preceding train has speeded up sufficiently. Where the vehicle is an electric train the fixed magnets &c. are incorporated in an elongated non-magnetic casing on the opposite side of the track to the conductor rail or the casing may be embodied in the rail itself, and a collector shoe, which must then incorporate or be made of, magnetic material may constitute the armature, though special armatures which are necessary where the train is non- electric may be used instead.
Patent GB-1279973-A (GB)
Title: Improvements in multiple spindle heads for drilling machines
Inventor: FITCH CLIFFORD KINGSBURY
IPC: B23B39/16
Filed: 1968-07-02
Abstract: 1279973 Multi-spindle drill head KINGSBURY FITCH (DEVELOPMENTS) Ltd 1 July 1969 [2 July 1968 7 May 1969] 31581/68 and 23387/69 Heading B3C [Also in Division F2] A multi-spindle drilling head comprises a plurality of spindles rotatably mounted in bearings in a carrier 12, Figs. 1, 3, each spindle having a crank-pin 25, mounted in a plate 20, which is gyrated so as to rotate the spindles by shafts 15. Each of the shafts 15 has two eccentrics 18, 19, and a sprocket 17 which is rotated by a toothed belt driven by a sprocket 22. Eccentric 19 is located in plate 20, and eccentric 18 diametrically opposed to eccentric 19, is located in a counterbalance plate 21. The sprocket drive may be replaced by a gear train. The workpiece 30 is carried on a vertically movable support 29, and a dust-extracting and cooling device 31 is provided. Plates 20, 12, may be replaced by plates having a different pattern of holes, or an overall grid pattern of holes may be provided in the plates so that the spindles may be inserted into selected holes. In a modification, spindles may be provided in all of the holes, and drill tips supplied to only the selected spindles. In a further modification a driving assembly 44, Fig. 4, is mounted on the drill carrier assembly 42 by three bearing assemblies 45, Fig. 6, consisting of three grooved plates 46, 51, 55, interconnected by tungsten carbide balls 49 and 53. Gyratory movement is imparted to assembly 44 by a shaft 57 having eccentric portions 60a and 60, which co-operate with balancing member 76, and a plate 63 of assembly 44. To absorb upward thrust on assembly 44 during drilling, four air bearing assemblies 67 are provided. Spindles 25 may be mounted in plain, or air bearings. A drill 86, Fig. 7, is connected to its spindle 64 by inclined faces 84, 87, and a sleeve 89 is fitted over the drill and spindle. The spindles and driving assembly 44 are cooled by liquid and air respectively.
Patent GB-996698-A (GB)
Title: Dentifrice dispensers
IPC: A47K5/18
Filed: 1964-06-05
Abstract: 996,698. Toothbrush racks; toothpaste dispensers. R. S. HAMILTON. June 5, 1964 [June 10, 1963], No. 23491/64. Heading A4V. A dispenser for pellets 36 of dentifrice comprises a housing 30 for a magazine or receptacle 34 of pellets, a channel beneath the receptacle to receive the head of a toothbrush 23 and a dispensing head 50 operated by movement of the toothbrush head in the channel to dispense the pellets one at a time on to the toothbrush head. Spaced toothbrush racks 20 are interconnected by a lower guide plate 24, which forms the base of the channel, and the upper wall of the channel is formed by a plate 32 interconnecting the side walls 31 of the housing 30 and having a delivery slot. The distributer head 50 is adhered to and closes the base of the magazine, which is formed by folding and glueing the blank shown in Fig. 8. The head rests on the upper surface of the plate 32 and has a rear wall 56 forming a delivery shoot to the discharge orifice 58, a slide 60 with a charging chamber 61, and a depending finger 70 which is engaged by the entering toothbrush head to displace the slide 60 along guide rails against the action of return spring 62 to dispense a single pellet through the discharge passage 72. The charging chamber 61 is covered by the wall 56 at the time of discharge so that only one pellet is dispensed at a time. An agitator leaf 44 is moved by a finger 65 of the slide to prevent coagulation of the pellets in the magazine. The pellets are of compressed powder or viscous paste with a surface glaze and after reception in a cavity in the brush head, formed by shorter bristles, are smeared on the bristles by a wiping edge 33 on withdrawal of the brush head:
Patent GB-1045780-A (GB)
Title: Rigid panel of mineral fibres with synthetic resin binder
IPC: B29C70/08
Filed: 1964-06-05
Abstract: A rigid panel comprises, by weight, between 83 and 98% of mineral matter, of which between 47 and 86% is interfelted mineral-wool fibres and between 14 and 53% shot particles, and between 2 and 17% of synthetic resin binder.  The shot particles are no larger than 10 mesh, 5 to 8% of them are retained on a 30-mesh screen, 30 to 40% on a 50-mesh screen and 50 to 60% pass a 50-mesh screen.  The panel has a density of between 4 and 70 lb/ft3.  The binder may be of phenol-formaldehyde, ureaformaldehyde, melamine-formaldehyde, polyvinyl alcohol, polyvinyl chloride, polyvinyl acetate or acrylic resin.  The panel may be made by making a blanket of the interfelted fibres, shot particles and uncured binder, e.g. by air-laying, compressing the blanket, cutting it to size, and then heating and pressing several of the cut portions between the platens of a multi-platen press.
Patent GB-285863-A (GB)
Title: Process of preparing new artificial textile products with reduced lustre from solutions of cellulose or cellulose compounds
IPC: D01F2/10
Filed: 1927-09-07
Abstract: 285,863. Bonwitt, G. Feb. 24, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Addition to 285,066. Cellulose solutions and solutions of cellulose esters and ethers, processes for making filaments from.-The process for preparing viscose silk exhibiting a reduced lustre, described in the parent Specification, is now applied to silk made from other solutions of cellulose and cellulose derivatives, namely, solutions of cellulose, cellulose hydrate, and cellulose conversion products, of cellulose nitrate and acetate, and of alkyl-, aryl- and aralkyl-celluloses and other mixed or simple cellulose esters and ethers in hydrochloric acid, caustic soda, acetic acid, cuprammonia, acetone, ether, alcohol-ether, or other volatile on non-volatile solvents. The added substance must be immiscible with the cellulose solution &c., or at least not miscible in all proportions, and it may evaporate during the drying of the thread after fixation, or it may be such as to remain therein; suitable substances are monochlorbenzene. xylene, hydrogenated naphthalenes, and mineral oils of high boiling point, and it is convenient if the added substance has the same specific gravity as the spinning solution so as to retard separation. In examples, paraffin oil is emulsified with viscose; a mixture of tetrahydronaphthalene and carbon tatrachloride is emulsified with viscose, or the two substances are added simultaneously or separately; and paraffin oil is added to a solution of cellulose acetate in acetone
Patent GB-295660-A (GB)
Title: Process for the manufacture of a spreading paste for proofing textiles
IPC: D06M15/693
Filed: 1928-08-16
Abstract: 295,660. Meyersberg, P. Aug. 16, 1927, [Convention date]. Latex, coagulating.-Natural or artificial latex is partially coagulated to make it suitable for coating fabrics by adding weak organic acids such as resin, elaine, stearic acid, or linseed acid. which react with the alkali present or added (e.g. ammonia, caustic soda or caustic potash) to form soaps. To increase stability, viscous oils such as castor oil may be added. Fillers such as whiting, china clay, kaolin, talc, lithopone, siliceous marl, or clay, and a disinfectant such as phenol, cresol, or creosote, which may be dissolved in the castor oil, may be added. The resin is added as a solution in a non-dissociating solvent such as colza or other oil. Specifications 193,044, 205,487, 220,591, 223,263, 263,849, 266,418, and 290,313 are referred to.
Patent GB-226290-A (GB)
Title: Improvements in or relating to tuning stands for wireless apparatus
IPC: H01F27/00
Filed: 1923-09-21
Abstract: 226,290. Igranic Electric Co., Ltd., and Mackley, A. H. Sept. 21, 1923. Wireless tuning- apparatus, adjustment devices for.-An adjustable coil - holder comprises an insulating body 4 provided at the side with screws 12 having hemispherical ends bearing in concave recesses in metal-supporting strips 11 mounted on an insulating panel. A cylindrical insulating body 3 carrying plug and socket contacts is mounted rotatably within the body 4; axial motion is prevented by a flange 5 and a washer 6. Electrical connection is made through the strips 11, screws 12, plates 13, flexible leads 15 and screws 16 to the plug and sochet contacts. One of the screws 16 serves to secure the washer 6. The body 4 is provided with a bent handle whereby it may be turned on its own axis or about the trunnion members 12. One or more movable holders may be mounted with a fixed holder.
Patent GB-1131974-A (GB)
Title: Telecommunication exchange employing cross point switches
Inventor: TRUEMAN ROY
IPC: H04Q3/00
Filed: 1966-05-26
Abstract: 1,131,974. Automatic exchange systems. ERICSSON TELEPHONES Ltd. 12 July, 1967 [26 May, 1966], No. 23685/66. Heading H4K. Each matrix of a relay cross-point switching system has a so-called mark-extension circuit, such as can be seen in Fig. 2, the corresponding matrix being shown in Fig. 1; the mark extension circuit having terminals II-14 corresponding to each inlet row of the matrix, a mark on any such terminal indicating that a path is required over the corresponding inlet and, if the path is not marked busy by potential on the P-wire of the inlet, causing a switching device such as one of the relays E1-E4 to operate and extend earth over a Zener diode Z to the socalled reservation wire RS of the matrix row to permit subsequent operation of the cross-point relays in that row, and causing the operation of a switching device such as relay F to extend forward markings to the matrix mark-extension circuits of the next stage by way of leads 01- 06. When, by means not disclosed, one of the marked paths is selected for use, current is drawn over the hold-wire H of a column and finds earth over the cross-point relay winding in the row the reservation wire of which is connected to the Zener diode Z in the mark-extension circuit. Once the cross-point relay has operated, the, P-wire is connected to the markextension circuit and disables the operated relay from the set E1-E4 to release the mark-extension circuit. The relays E1-E4 are connected in a chain with diodes d12, d13 to d42, d43, so that the relay of highest denomination locks out relays beneath it. As an alternative, and as shown by the addition of dotted line circuits, the chain may accept the first mark to arrive and lock out later marks. A delay circuit DL times a period beyond which a relay J operates to release the mark extension circuit if normal operations have not been completed. The relays E and F may be replaced by transistor switching circuits (Fig. 3, not shown).
Patent GB-1144642-A (GB)
Title: Angle attachment for a machine tool spindle
IPC: B23C1/12
Filed: 1965-06-03
Abstract: 1,144,642. Machine tool details. V. H. BALDING. 3 June, 1966 [3 June, 1965], No. 23715/65. Heading B3B. An angle attachment for a machine tool spindle comprises a first housing 10, split at 13, 14 so as to be securable to a quill 11, and a second housing 27, to secure to the first housing and adjustable about the axis of a spindle 24. The first housing supports a shaft 16 which is driven by the machine tool spindle 12 through a dog, and which drives spindle 24 through bevel gears 22, 23. A bevel gear 32 on spindle 24 meshes with a bevel gear 33 on the shaft 34 of a collet 37. Housing 27 has an annular rib 28 which locates in a T-slot 29 on housing 10, four holding down bolts 30 also being accommodated in the slot.