baber/WOPTO huggingface dataset:
Patent GB-398838-A (GB)
Title: Improvements in or relating to apparatus for measuring or indicating the power factor of an alternating current supply system
IPC: G01R25/00
Filed: 1932-03-19
Abstract: 398,838. Power-factor measurements. ELLIOTT BROS. (LONDON), Ltd., Century Works, Lewisham, London, and SHOTTER, G. F., 14,' The Ridgeway, Friern Barnet, Middlesex. March 19, 1932, No. 8230. [Class 37.] Power-factor is measured or indicated by two electromagnet systems acting differentially on respective conducting elements mechanically connected, the rate of change of driving force of one electromagnet. system being different from that of the other for the same change in power-factor. One of the conducting elements is so shaped that its electromagnet system urges it more into or out of the field produced thereby. The magnet systems comprise current and voltage cores, the latter being provided with short-circuit rings or being energized through resistances, inductances or capacitances to produce a phase displacement of 90 degrees between two voltage fluxes. In a balanced three-phase system, the phase displacement is obtained by connection to different phases. A four-wire three-phase balanced system, Fig. 1, has voltage and current cores 3 .. 6 acting upon a circular rotor 1 and shaped rotor 2, the driving torque on disc 1 being proportional to the sine of the phase angle and that on disc 2 to the cosine. As the disc 1 rotates disc 2 into or out of the fields due to cores 4, 6 the torque on the shaped rotor varies until it balances that on disc 1 in which position power-factor is indicated. In a three-phase unbalanced system, two shaped rotors are employed, the series magnets being energized from two lines and the voltage magnets from midpoint tappings on autotransformers across two of the phases. A threephase four-wire unbalanced system has three shaped rotors, the current and voltage connections being made to all phases. In the threewire system the circular rotor is acted upon by two driving magnet systems and in the fourwire arrangement by three driving magnet systems. The electromagnet system acting on the shaped disc or discs may be duplicated to give increased control torque and readings at all power factors, the voltage core windings being connected in parallel and the current windings in series. Instead of employing common cores for the voltage and current magnets, they may be separated and employed in conjunction with disc rotors having central portions 52 cut away, Fig. 6, this arrangement preventing eddy current reaction between the magnet systems. The voltage pole tips may be provided with shading-rings 55. The circular rotor may have radial slots to prevent eddy current interaction. A single disc rotor may be employed to give torques depending on the sine and cosine functions. Drum rotors, or plates moved rectilinearly in guides may be employed. Instead of displacing the flux due to the voltage magnets, these may be connected to the same phase and the fluxes due to the currents displaced, or both fluxes may be relatively displaced. Specification 373,120 is referred to.
Patent GB-979825-A (GB)
Title: Amplifier for two way speech transmission
IPC: H04M9/00
Filed: 1963-03-01
Abstract: 979,825. Two-way transmission systems. A. B. GYLLING & CO. March 1, 1963 [March 9, 1962], No. 8301/63. Heading H4R. In a two-way transmission system having separate amplifiers for each direction of transmission and a control device differentially varying the gains in the two channels in accordance with the relative signal strengths in the two channels, the control signal is derived from the higher frequency components of the signals being amplified in the channels in order that the control arrangement will discriminate against noise picked up by the microphone, which will generally originate at a distance from the microphone and will therefore have its low frequencies emphasized, as against the speech signals originating from close to the microphone, and therefore having a normal frequency distribution. The Figure shows a two-way transmission system having amplifiers 6a, 7a, 8a and 6b, 7b, 8b for the respective directions of transmission, amplifiers 8a and 8b being of variable gain controlled by the gain controlling device 9 which derives a control signal in accordance with the signal strengths in the two channels, the signal strength being determined before and/or after the control amplifier and with high pass, or band-pass, filters 12a, 13a, 12b and 13b between the signal amplifiers and the control device 9. The filters having an attenuation at 300 c/s. at least 6dB greater than at 3000 c/s.
Patent GB-254022-A (GB)
Title: Improved means for attaching the mudguards of cycles and the like
IPC: B62J15/00
Filed: 1925-12-18
Abstract: 254,022. Morgan, J. T. Dec. 18, 1925. Stud-and-slot fas. tenings; aligned sleeves and pin fastenings.-Mudguards are secured to the fork crown by means of a bracket 8, Fig 2, having a slot 9 and a spring-pressed bolt 10 having ahead 13 with a tapered neck, and the stays 3, Fig. 1, are secured to the forks by means of a clip 4 having resilient arms 7 forming a sleeve.
Patent GB-291370-A (GB)
Title: Improvements in television systems
IPC: H04N3/34
Filed: 1928-03-19
Abstract: 291,370. Electrical Research Products, Inc., (Assignees of Mather, R. C.). May 31, 1927, [Convention date]. Addition to 288,234. Television.-Comprises improvements in television apparatus of the kind in which an object 25 is scanned by a pencil of light projected through a scanning disc 22, and light reflected on to a photo-electric cell 30 controls the signals transmitted to a receiver comprising a glow lamp 130 and a scanning disc 132, masks 23, 133, being provided at both stations to limit the field of view. Low-frequency components of the signal current are suppressed from the line 40 which conveys the high frequency components and according to the present invention they are transmitted over a separate channel 90. This channel may be a telegraph line while the channel 40 conveying the high frequency components may be a telephone line. At the transmitting station the output of a photo-electric cell 30 is passed to the line 40 through an amplifier A31 which passes frequencies of more than 10 or 15 cycles only. Signals passing over this line are at the receiving station passed through amplifiers A100, A110, A120 to a glow discharge lamp 130 whose luminosity fluctuates correspondingly. The lowfrequency components of the signals, representing fluctuations in the average brightness of the picture, are derived from a cell 50, which may be sluggish but sensitive selenium or thalophide cell, pass through a direct current amplifier DCA60 and a low-pass filter LPF70 either to a direct-current telegraph line (not shown) or to a carrier-current channel 90, in which case they are received by a detector-amplifier AR140 and applied through an input resistance 160 to the amplifier A120 so as to be superimposed on the high-frequency components of the signals. A retardation network DCN32 may be employed to secure coincidence of phase between the highfrequency and low-frequency components of the received signals. Instead of the cell 50 the cell 30 may be used for the high-frequency components, which in that case are applied to the amplifier DCA60 by turning up the switch 51. The circuit networks shown at the receiver mav be transferred to the transmitter so that the outgoing current may contain both ranges of components.
Patent GB-985255-A (GB)
Title: Improvements in or relating to valve devices
IPC: G05D7/01
Filed: 1963-03-01
Abstract: 985,255. Shock-absorbers. SFERMA, SOC. FRANCAISE D'ENTRETIEN ET DE REPARATIONS DU MATERIEL AERONAUTIQUE. March 1, 1963 [March 2, 1962], No. 8359/63. Heading F2S. A valve device for controlling the fluid flow cross-section in a duct in response to pressure differentials in either sense across the device comprises a valve which is secured by a ring 59 in a well 56 at one end of a cylinder 1, the valve consisting of two half-shells 28, 29 with holes 37, 38 and which are secured together by nuts 35, 36 and a bolt 34 to clamp, between two convex surfaces, a spring disc valve 31, a sealing ring 33 being located between the outer flanges of the shells 28, 29. The surface 28a which co-operates with the outer edge of the washer is symmetrical so that the damping effect is the same in both directions. The single washer can be replaced by a stack of washers.
Patent GB-1372841-A (GB)
Title: Work holders
IPC: B23G1/52
Filed: 1973-03-19
Abstract: 1372841 Rolling tubes LISKEY ALUMINUM Inc 19 March 1973 [23 March 1972] 8403/74 Heading B3M  A work-holder for carrying a slotted tubular workpiece 19, (Fig. 2), comprises an elongate mandrel 1 having a longitudinal key blade 4, and a vice 9 to grip the key blade. The vice comprises blocks 11, 12 which grip a wide portion 5 of the key blade 4, locating pins 14 projecting from the block 11 through holes 7 in the key blade 4 to engage sockets in the block 12. Part-cylindrical recesses 11A, 12A in the blocks  form with the mandrel 1 an annular space through which the workpiece 19 can slide axially while being held against rotation by the key 4. Tapped holes 13 in the blocks 11, 12 allow attachment to the carriage of a deforming machine, for a forming operation as described in Specification 1,372,842.
Patent GB-868154-A (GB)
Title: Improvements relating to electric igniters
Inventor: BARNES LESLIE
IPC: H01T13/52
Filed: 1959-03-11
Abstract: 868,154. Igniting burners. ROLLS-ROYCE Ltd. March 7, 1960 [March 11, 1959], No. 8496/59. Class 75(3). [Also in Group XXVII] In a high energy low tension creep type sparking plug, which may be used in gas turbines, means are provided to supply a gas fuel mixture under pressure to the spark gap in such a manner that the effective lengths of the path of the spark is increased (see also Group XXVII). As shown the gas fuel mixture is supplied through a passage 13 to a central bore 14 and then through four inclined passages 15 to four separate longitudinal passages 16. The mixture then passes through slots 17 to enter the region of the spark gap. Preferably the gas employed is air and the fuel is vaporized fuel such as kerosene.
Patent GB-768089-A (GB)
Title: Di-guanyl hydrazones
IPC: C07D233/52
Filed: 1954-03-23
Abstract: The invention comprises diguanyl hydrazones of a diphenyl dialdehyde or diphenyl diketone in which the phenyl nuclei are joined together through an -O.R.O-radical or -O.R.O.R.O-radical having up to 12 carbon atoms in which R is a divalent aliphatic radical, or through an oxygen atom, or are directly linked to each other, and the guanyl radicals are unsubstituted or substituted by alkyl, aryl or aralkyl radicals, or may form part of a heterocyclic ring such as an imidazoline or an N-alkyl tetrahydropyrimidine ring.  The compounds are made by (1) condensing the corresponding dialkehyde or diketone with an amino guanidine; (2) reacting a di-thiosemicarbazone of the dialdehyde or diketone with ammonia or an amine in the presence of a heavy metal salt; (3) reacting a dihydrazone of the dialdehyde or diketone with a cyanamide; (4) condensing an aminoguanidine with a hydroxybenzaldehyde or benzoketone and reacting the resulting guanyl hydrazone of a hydroxy benzaldehyde or hydroxybenzoketone with a dihalogenoalkane in the presence of an alkali metal alkoxide; or (5) by linking 2 mols. of a guanyl hydrazone of a benzaldehyde or benzoketone, e.g. the guanyl hydrazone of p-bromobenzaldehyde may be converted into the corresponding diphenyl compound.  The compounds may be converted into their salts with acids, for example, with organic acids such as lactic or acetic.  Examples describe the preparation of the bis-guanyl hydrazones of p,p1-diformyl-1 : 3-diphenoxypropane; p,p1-diformyl-1 : 5-diphenoxypentane; p,p1-diformyl-1 : 6-diphenoxyhexane; diphenyl ether p,p1-dialdehyde; diphenyl-, p,p-dialdehyde; o,o1-diformyl-1 : 5-diphenoxypentane; o,o1-diformyl-1 : 4-diphenoxybutane; m,m1-diformyl-1 : 5-diphenoxypentane; p,p1-diformyl-1 : 4-diphenoxybutane; p,p - diformyl - 1 : 3 - phenoxypropan - 2 - ol; p,p1 - diformyl - o,o1 - dimethoxy - 1 : 5 - diphenoxypentane; p,p1 - dipropionyl - 1 : 5-diphenoxypentane and p,p1-diformyl-2 : 21-diphenoxy-diethyl ether; substituted guanyl hydrazones comprising the bis-isopropylguanyl and phenylguanyl hydrazones of p,p1-diformyl-1 : 3-diphenoxypropane and the bis-dimethylguanyl hydrazone of p,p1-diformyl-1 : 5-diphenoxypentane and as compounds wherein the guanyl residue forms part of a heterocyclic ring, the bis-(N2-imidazolino-(2)) derivatives of p,p1 - diformyl - 1 : 3 - diphenoxypropane-dihydrazone and p,p1 - diformyl - 1 : 5-diphenoxypentane-dihydrazone.
Patent GB-313666-A (GB)
Title: Improvements in or relating to filing cabinets
IPC: B42F17/02
Filed: 1928-03-21
Abstract: 313,666. Harvey & Co. (London), Ltd.. G. A., and Birkbeck, J. A. March 21,1928. Shelves; fittings for securing hooks in position on shelves. -Shelves for filing cabinets &c. are provided with compressor plates sliding parallel to the front of the cabinet and removable by a direct lift. For this purpose the shelf 1 is formed with a groove containing a channel-iron 8 with its edges bent over to engage a projection on the plate 5 and the channel iron is cut away at one end to allow of the removal of the plate. The shelf may be fixed in the cabinet or removable. It may be horizontal, or tilted as shown and provided with a guard plate 7, or it may be V-shaped in cross section with the groove at the edge of the V.
Patent GB-351013-A (GB)
Title: Improvements in or relating to the preparation of aliphatic sulphuric acid compounds
IPC: C11C3/00
Filed: 1930-03-18
Abstract: Sulphonated fatty acids and their esters containing at least 9 carbon atoms in the molecule.  prepared in known manner, are freed from unsulphonated constituents by neutralizing and then washing with organic solvents insoluble in water in the presence of sufficient water to ensure the formation of two layers.  The lower layer, comprising a solution mainly of lactones of the higher fatty acids in the solvent is separated, and the solvent removed by distillation. In an example, anhydrous ricinoleic acid is sulphonated with concentrated sulphuric acid in the presence of acetic anhydride, and after neutralization with caustic soda is washed with trichlorethylene.  Other solvents specified are carbon tetrachloride, ether, and liquid hydrocarbons. Specifications 293,480 and 296,935, [both in Class 2 (iii), Dyes &c.], are referred to.
Patent GB-355274-A (GB)
Title: Improvements in or relating to commutator dynamo electric machines
IPC: H02K13/14
Filed: 1930-03-19
Abstract: 355,274. Dynamo-electric machines; rectifying alternating currents. PLATEN, B. C. VON, 6, Lilla Baltgatan, Stockholm. March 19, 1930, No. 8819. Convention date, March 19, 1929. [Classes 35 and 38 (ii).] Improving commutation, auxiliary means for; commutators; brushes ; brushholders; commutator switching arrangements. - For reducing sparking between the brushes and commutator segments of a dynamo-electric machine, the brush is formed of two or more parts interconnected by condensers, and ohmic resistances are arranged to be in series with the condensers at the time of their discharge through the brushes but are short-circuited during at least part of the period of charging. As shown in Fig. 2, the brush is in three parts 1, 2, 3, the main part 3 being wider than the others. The parts 2, 3 are divided as shown by interposed resistances 25 which may be an alloy holding the two halves together, and condensers 6, 7 are connected to the trailing halves of the brush parts so that the resistances 25 are not in action when the condensers are being charged from the commutator segments e, f, but are in series with the discharge path. In a modification, Fig. 7, the brush parts 2, 3 are not subdivided, but the leading edge of each commutator segment is separated from the main body of the segment by a resistance 26. The parts of the brush are held in an insulating member 15, Fig. 8, which is slidable in an insulating socket 16 carried in a metal cover 17. Contact pressure is obtained by means of a pin 21 which is forced against the member 15 by a tension spring 20 engaging a washer 22 at the upper end of the pin and a washer 23 mounted in a screwed cap 19. The cap 19 is adjustable in the cover 17 for the purpose of varying the tension of the spring 20. The invention is particularly applicable to the continuous-current machines described in Specification 323,498, [Class 35, Dynamo-electric generators &c.]. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following:- (1) Undivided brush parts may be used connected by condensers with resistances in parallel or in series; (2) each commutator segment may be divided into separate parts connected by condensers which may be combined with resistances; (3) the brushes of a pair need not be diametrically opposite ; (4) instead of using a commutator with two segments, four may be employed as in Fig. 20 (Cancelled), opposite segments r, p and n, q being connected together and to the ends of the armature winding 10 ; (5) the brush holder may be of the form shown in Fig. 21 (Cancelled), comprising three brushes 1, 2, 3 held by screws in an insulating socket 15 ; (6) the invention is applicable to the reduction of arcing during the interruption and reversal of current in inductive electric circuits generally. This subject-matter does not appear in the Specification as accepted.
Patent GB-1283028-A (GB)
Title: Process for the production of vinyl chloride from 0,2-dichloroethane
Inventor: RECHMEIER GERHARD
IPC: C07C67/00
Filed: 1970-02-24
Abstract: 1283028 Vinyl chloride KNAPSACK AG 24 Feb 1970 [4 March 1969] 8819/70 Heading C2C Vinyl chloride is produced by incomplete thermal cracking of 1,2-dichloroethane at 450‹ to 650‹ C. in the absence of a catalyst, the gas mixture leaving the cracking zone, consisting of vinyl chloride, hydrogen chloride, unreacted 1,2 - dichloroethane and by - products, being passed in a partially condensed state into a first distillation zone wherein hydrogen chloride is distilled off and then into a second distillation zone wherein the vinyl chloride is distilled off, whereupon the sump product of the second distillation zone is treated so as to recycle the unreacted 1,2-dichloroethane to the cracking zone as described in Specification 1,124,874, the vinyl chloride removed at the top of the second distillation zone being condensed and a part of it pumped back to an intermediate point in the first distillation zone, the remaining vinyl chloride removed as product, which still contains traces of hydrogen chloride, being fed to the top of a degasification zone from which a part of the'vinyl chloride, together with all the hydrogen chloride associated therewith, is evaporated by a recirculating evaporator, condensed, and pumped back to an intermediate point in the original hydrogen chloride distillation zone, pure vinyl chloride being removed from the bottom of the degasification zone.
Patent GB-1464375-A (GB)
Title: Abrading devices
IPC: B24D5/02
Filed: 1974-05-22
Abstract: 1464375 Abrasive devices ASSOCIATED ENG Ltd 22 May 1974 [22 Feb 1973] 8835/73 Heading B3D [Also in Division B2] A method of producing an abrading device, such as a grinding wheel for mechanical or electrolyte grinding, a hand file, or lining for a tumbling machine for de-burring and surface roughing, having an abrasive layer 3 of ceramic material alone on a former 1 affording a substrate, comprises plasma spraying, from a plasma gun, a ceramic material containing at least 50% by weight of alumina, which at least partly melts in the spraying process, so as to fuse to the former and form an abrasive layer on the substrate. In one example, a grinding wheel produced by the method has an annular aluminium wheel 1, a sleeve 2 of synthetic plastics material and a layer 3 of ceramic abrasive material sprayed on to the wheel, the layer consisting entirely of alumina having a grain size of 220 (FEPA). In another example, the wheel is of mild steel, or a mild steel rim is detachably mounted on a wheel, and the layer consists of 75% by weight of alumina plus 25% by weight of titania, the grain size being 360 (FEPA). In a third example, the layer consists of 50% by weight alumina and 50% by weight chrome oxide, the grain sizes being, respectively, 150 and 400. The sprayed alumina may contain at least 40% by weight of gamma phase alumina and, on a former 200 mm. in diameter, may have a thickness up to 10 mm. The former may be of metal, ceramic or high temperature synthetic resin.
Patent GB-720864-A (GB)
Title: Improvements in or relating to glow switches
IPC: H05B41/08
Filed: 1953-03-31
Abstract: 720,864. Thermal switches. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. March 31, 1953 [April 10, 1952], No. 8887/53. Class 38 (5) [Also in Group XL (a)] A glow switch for the starting of fluorescent lamps comprises a pair of electrodes 18, 20, one 20, of which is a bimetallic element, disposed in an envelope 12, the envelope containing a gas comprised of from 0.4 to 5 per cent. of hydrogen by volume and the balance substantially of argon. The gas pressure in the envelope is between 25 and 33 millimetres of mercury. The heating of the bimetal strip 20 is caused by the glow discharge in the switch, the discharge being short circuited when the bimetal strip 20 moves to contact the electrode 18. The current which then passes through the switch is insufficient to heat the strip; it thus cools down and moves back to break the circuit to initiate the discharge in the fluorescent lamp, the arc at the electrodes 18, 20 being rapidly quenched by the presence of the gas in the envelope. The voltage across the lamp and thus across the glow switch electrodes is reduced when the lamp discharge exists; the discharge in the glow switch is not, therefore, re-established. The argon used may be tank argon having approximately 0.15 per cent of nitrogen therein. Various methods may be used to introduce the hydrogen into the envelope. Besides introducing it as a component of the gas filling, it may be painted on the stem or other parts of the switch in the form of metal hydrides thus to release the hydrogen. Alternatively, water vapour may be introduced into the envelope which is then dissociated into its chemical components or. hygroscopic or deliquescent salts may be used, the oxygen being absorbed by a gettering process. In order to make up the hydrogen losses during the initial operation of the switch, the gas filling should contain between 1.5 and 6 per cent. of hydrogen in order that the final 0.4 to 5 per cent. thereof is maintained.