baber/WOPTO huggingface dataset:
Patent GB-425491-A (GB)
Title: Improvements in or relating to electric arc converters
IPC: H01J13/28
Filed: 1933-10-31
Abstract: 425,491. Arc converters. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and GARRARD, C. C., c /o General Electric Co., Witton, Birmingham. Oct. 31, 1933, No. 30220. [Class 40 (v)] In an arc converter of the type in which a gaseous fluid flows past the working faces of the electrodes, relay means responsive to a state or condition of the fluid or a means for causing fluid to flow is provided, and is adapted upon the occurrence of a predetermined state or condition to effect a control safeguarding the rectifier against back firing. In one form, a converter 1 is provided with an air inlet 4 communicating with a reservoir 5 which is replenished from a pump 9 driven by a motor 10. A compressed air cylinder 17 is connected to the converter through a pressure-responsive relay 18, valve 16 and master control valve 15 which is operated by a governor 11 on the motor 10. Opening of the valve 15 may operate a signal, and, in addition, causes the relay 18 to break the circuit to the ignition device 22 when the pressure in the cylinder 17 has reached a predetermined minimum. In a modification, a governor on the pump motor, a pressure relay on the reservoir and a flow relay responsive to the drop across a Venturi nozzle in the inlet pipe operate circuit breakers in the ignition circuit upon decrease of pump speed, air pressure or air flow. In another form, the relay means comprises a device, such as an electromagnet, responsive to the power supplied to the motor driving the pump. The relay means may close a trip circuit operating a circuit breaker on the alternating-current or continuous current side of the converter, or on both. Specifications 406,999, 409,974, and 412,935 are referred to.
Patent GB-668820-A (GB)
Title: Hand-actuable cultivating implement
IPC: A01B35/02
Filed: 1950-12-13
Abstract: 668,820. Hand-actuated cultivators. WINTERS, A. Dec. 13, 1950. No. 30410/50. Class 6(i). To the spindle of a spiked wheel 12 is pivoted a pair of curved arms 17 ending in earth-working tines 18. A bridge piece 19 carries a pole handle 21, the line of thrust being below the wheel axis 15. At the front the arms carry a hoe-blade 26.
Patent GB-639278-A (GB)
Title: Improvements in or relating to the drawing of sheet metal
IPC: B21D22/22
Filed: 1947-11-17
Abstract: 639,278. Cupping. GRABEC, J., and CASLAVSKY, K. Nov. 17, 1947, No. 30499. [Class 83 (iv)] A punch for deep drawing from sheet metal blanks is made to expand radially under axial pressure and bite into the side walls of the blank to relieve the tension on the end thereof during the final stages of drawing. The blank 6, Fig. 1, gripped between a holder 7 and a die 8 is cupped by a bolt 17 slidably mounted in a bore 16 of a ram 10 and adjustably located by nuts 12. A conical upper surface of the bolt head supports a stack of conical spring steel washers 18 and spacers 19 against a conical face of the ram 10. The washers 18 have sharp edges and radial slits and an apex angle greater than that of the spacers 19, bolt head and ram and when free are of the same outer diameter as the bolt 17 but during drawing they are flattened to produce a diametral expansion of 5-15 per cent of the shell thickness and are thereby caused to bite into the wall and draw it into the die. On the return stroke the washers contract and release the work. In a modification the spacers 19 are omitted. In an alternative punch a bolt 41, Fig. 5, slidably mounted in ram 10<SP>11</SP> is forced vertically upwards relative to the ram during drawing to carry punch segments 221, 241 with sharp-edged grooves 33<SP>1</SP> over a conical mandrel 211 of approximately 10 degrees apex angle rigidly fixed to the ram, whereby the segments are forced outwards to bite into the walls of the work. The segments are located in a slot 46 which is engaged by a ring 45 on the upper face of the head of bolt 41 and also by a ring 26<SP>1</SP> screwed to the ram head and during drawing the quadrants are tightly compressed against a rubber ring 34<SP>1</SP>. In a further alternative punch the bolt 41 is omitted and the segments 221, 24<SP>1</SP> form the base of the punch and are held radially against the coned mandrel 211 by a spring ring located in a circumferential groove. Punches may be of elliptical, rectangular or other non-circular crosssection and are prevented from rotating on the axis of the punch by splines &c.
Patent GB-836609-A (GB)
Title: Measuring apparatus
IPC: G01K1/02
Filed: 1956-10-05
Abstract: 836,609. Measuring temperature electrically. FOXBORO CO. Oct. 5, 1956 [Oct. 17, 1955], No. 30502/56. Class 40 (1). [Also in Groups XXXV and XXXIX] A self-balancing potentiometer for measuring the output of a thermocouple includes a transistor modulator, and a Zener diode voltage reference source. The output of a thermocouple 10 is compared with a reference voltage tapped off a motor-driven potentiometer 16. The D.C. error signal is converted to an A.C. signal of twice mains frequency by a frequency doubling magnetic modulator 60 as disclosed in Specification 797,721 and this signal is amplified by transistors 78, 78a, 78b coupled by tuned transformers 86, 86a, 86b before being synchronously demodulated by rectifiers 112, 114. The A.C. reference signal for the demodulator is obtained from a transformer 100 which passes the ripple current from the full-wave rectifier circuit 102, 104. This rectifier supplies direct current to the transistor amplifier. The D.C. signal from the demodulator controls a push-pull pair of transistors 134, 136 which control a magnetic modulator 156 supplying the control winding of a two-phase servomotor M. The motor M drives the slider of potentiometer 16 to balance the thermocouple output. A stable D.C. reference voltage is obtained from the A.C. mains by rectifying at 34, 36 the output of a transformer 30 which saturates during each cycle so as to partially stabilize its output voltage. The D.C. voltage is then applied in series with a resistor 38 across a reversely-connected silicon junction diode to provide a stable voltage. Temperature compensation may be provided by a temperature-variable resistor 43 in the output potential divider. Reference has been directed by the Comptroller to Specification 697,880.
Patent GB-1352467-A (GB)
Title: Thiazolines and their use as flavourants
IPC: A23L27/20
Filed: 1972-06-29
Abstract: 1352467 Thiazolines L GIVAUDAN & CIE SA 29 June 1972 [30 June 1971] 30522/72 Heading C2C [Also in Division A2] #<SP>3</SP>-Thiazolines of the general formula wherein R represents a C 3-7  alkyl group; the benzyl group or the 2-methylthioethyl group are claimed per se and are prepared by reacting an aldehyde of general formula with ammonia or an ammonium salt and α- mercaptoacetaldehyde. The α-mercaptoacetaldehyde may be generated in situ from, e.g. the dimer (bis-mercaptoacetaldehyde by reaction with, e.g. NaHS. The reaction may be carried out in the absence or presence of a solvent e.g. alcohols, ethers, hydrocarbons, amines, amides, water or liquid ammonia. If the reaction is carried out in an organic solvent, anhydrous sodium sulphate is expediently used as a water removing agent. The reaction may be carried out at about- 30‹ to 100‹ C. for 5 minutes to 24 hours.
Patent GB-1001321-A (GB)
Title: Improvements in or relating to temporary partitioning devices
Inventor: LAUBIE ANDRE
IPC: E21F17/103
Filed: 1963-08-01
Abstract: 1,001,321. Mines &c. S. E. M. A. Aug. 1, 1963, No. 30535/63. Heading E1F. [Also in Divisions A4 and A5] A device for blocking an opening or an underground gallery or for use as a fire-break comprises a flexible body 1 which can adapt itself to the shape of the opening or gallery, and a curtain 7 fixed to the body. The inflated tube 1 is secured by straps 2 to eyes in the wall of the mine gallery. The curtain, which is secured to hooks 5 on the side of the tube from which an air current in the gallery tends to flow, may be furled in straps 8.
Patent GB-653400-A (GB)
Title: Mechanical abrading method for the complete attrition of cereals
IPC: B02C9/00
Filed: 1947-11-18
Abstract: In a method of finely disaggregating cereals through attrition by abrasive surfaces cereals having the pericarp removed are submitted to friction by the abrading walls of one or more cylindrical receivers, (see Group II), which do not move angularly, containing the grains while moving eccentrically round an axis parallel to their geometrical axes so as to produce between the grains and said abrading walls a friction which is even more abrading when the walls of the receiver are moving more rapidly and with greater eccentricity.  Specification 510,365 is referred to.
Patent GB-269222-A (GB)
Title: Improvements in and relating to fuels for use in internal combustion engines and forother purposes
IPC: C10L1/10
Filed: 1925-12-03
Abstract: 269,222. Meyer, E. G. E. Dec. 3, 1925. Motor spirit of the kind comprising liquid hydrocarbon, ether, and ammonia or other volatile basic material is obtained by mixing the liquid hydrocarbon and the volatile basic material, and thereafter adding the ether. The hydrocarbon is preferably such that 6-25 per cent distils over up to 100‹ C., 30-60 per cent to 150‹ C., 50-98 per cent up to 200‹ C., and 86-100 per cent up to 225-300‹ C. It may comprise a proportion of coal-tar hydrocarbons. A suitable proportion of ether is <1>/19 -<1>/20 part by volume. Specification 262,363 is referred to.
Patent GB-837303-A (GB)
Title: Electron tube
Inventor: DRIESCHMAN DONALD FREDERICK
IPC: H01J19/42
Filed: 1956-10-08
Abstract: 837,303. Thermionic-cathode tubes. EITEL -McCULLOUGH Inc. Oct. 8, 1956. No. 30608/56. Class 39(1). [Also in Group XI] In a power tube comprising a cathode positioned within an anode, a heater for the cathode and an insulating header through which a plurality of terminal pins are sealed, the heater is supported by two spaced conducting rods rigidly connected together by insulating members so that the heater, rods and insulating members form a unit which may be easily inserted into the tube, the insulating members preferably being arranged so as to provide a thermal barrier between the heater and the header. As shown in Fig. 1, the insulating members are in the form of ceramic discs 58, 59, which are a sliding fit in the cathode skirt 32, the rods 53, 54, supporting the heater 52, being rigidly connected thereto by U-shaped connecting wires 60. The lower ends of the rods are connected by legs 55, 56 to terminals 23, 27. The cathode 10 is connected by skirt 32 and collar 33, which has four legs, to four of the terminal pins, only two of which, 24, 26 are shown. A screen grid 12 is connected by rings 46, 45 to metal envelope portions 17, 18 which serve as a terminal for the screen grid, although a lead 50, Fig. 5, may be provided to connect ring 45 and thus the screen grid to terminal 29. A control grid 11 is connected by means of yoke 40 to a centre terminal port 22. A flash type getter 49 has its ends spot welded to terminal 25 and ring 45. The metal deposited on the header when the getter is flashed is thus between terminal 25, which has no electrical connection during operation of the tube, and ring 45, so that no harmful leakage is caused thereby. The anode 13, Fig. 1, is provided with cooling fins 62 formed from a single strip of metal. Specification 782,999 is referred to.
Patent GB-307387-A (GB)
Abstract: 307,387. Stone & Co., Ltd., J., and Darker, A. H. Dec. 6, 1927. Closets, flushing; seat action water-waste preventers. -Apparatus for enabling preliminary and full flushes to be given, with or without an after-flush, comprises a valve e controlling the main flush which is delivered through a pipe j. The liquid remaining in the pipe j may be delivered as an after-flush, by making provision for air to enter the pipe; that remaining in the pipe h or an enlargement thereof is delivered through u valve d operated by the seat b when the latter is next depressed.
Patent GB-979647-A (GB)
Title: Improvements relating to cylinder heads for pumps and compressors
IPC: F04B39/12
Filed: 1961-08-25
Abstract: 979,647. Valve assembly for compressors or pumps; reciprocating pumps. MASCHINENFABRIK BURKHARDT A.G. Aug. 25, 1961 [Sept. 6, 1960], No. 30815/61. Headings F1A and F1N. A cylinder head comprises a suction valve 7 centrally disposed in a cylindrical core member 6 and a separate annular delivery valve 8 slidable at its inner periphery on the core member 6, the sealing circles of the two valves lying in the same plane A-A. This permits a cylinder head construction in which parts subject to alternating pressure contain no bores, and the risk of fatigue failure is reduced. Valve 8 may seat on a replaceable ring. Valve 7 may be a ball or plate valve.
Patent GB-192223-A (GB)
Title: Improved chemical fire extinguishing apparatus
IPC: A62C5/00
Filed: 1921-11-18
Abstract: 192,223. Willis, N. E. Nov. 18, 1921. Fire-extinguishing by foam and by solution.- In a portable or stationary lire-extinguishing apparatus of the type in which two separate chemical solutions are forced by compressed air into a mixing-chamber and thence discharged as foam or otherwise through a hose or sprinklers, an aircompressor A delivers air to a reservoir R, from which it is passed through pipes P to two chemical-tanks C to force the solutions therefrom through pipes E and one-way valves to a mixing- chamber D having an outlet H to a hose. The compressed air is stored in the reservoir R between spring-pressed plungers O sliding on guides and provided with rubber shields or flanges to render them air-tight.
Patent GB-1381916-A (GB)
Title: Preparation of films for processing
IPC: G03D13/00
Filed: 1972-06-30
Abstract: 1381916 Preparing films for processing AGFA-GEVAERT AG 30 June 1972 [30 June 1971] 30841/72 Heading G2X  In preparing exposed films for processing, each film being associated with a data carrier such as the customer's order wallet in which the film has been supplied, the films are joined together into a strip and the same identification mark is applied to both the film and the data carrier. As shown, the cassette 33 of exposed film is inserted through an aperture 3, and the order wallet is which the cassette has been received in inserted through an aperture 4. The wallets pass on to an endless conveyor belt 29 which has cross bars 29a for holding the wallets against movement relative to the belt. The cassette is broken open by a chisel 31 and the take-up spool engaged and lifted out by a retaining means 5. This carries it round 180 degrees to a transfer device 7 comprising four radially extending arms. As the device 7 is rotated through successive stations the film strip is unwound, the paper leader stripped away and discarded. The film is cut and spliced to the preceding film by a splicing device 20, and reaches an identification station 23 at the same time as the corresponding order wallet. The same identification mark is stamped on both the film and the wallet, the film then being passed to the cassette 25 of a developing device while the wallets drop into a collecting box 30. The finished prints are then brought together with the film and the order wallet for return to the customer.
Patent GB-1292393-A (GB)
Title: Method for the separation of ammonium sulphate from an aqueous acrylamide-ammonium sulphate slurry
IPC: C07C231/12
Filed: 1970-06-25
Abstract: 1292393 Ammonium sulphate MITSUBISHI CHEMICAL INDUSTRIES Ltd 25 June 1970 [4 July 1969] 30962/70 Heading C1A [Also in Division C2] Ammonium sulphate is separated from an aqueous acrylamide-ammonium sulphate slurry obtained by the neutralization, by means of ammonia or an ammonium salt of a weak acid, of acrylamide sulphate which, in turn, has been produced by the hydration or hydrolysis of acrylonitrile by means of sulphuric acid, by a process which comprises adding a water-soluble alcohol, ether, carboxylic ester, ketone or a pyridine such that it forms 0À7 to 20% by weight of water present in the slurry, at a temperature of from 10‹ to 30‹ C. The slurry is then subjected to centrifugal separation of the ammonium sulphate and the resulting filtrate crystallized to yield the acrylamide.
Patent GB-341103-A (GB)
Title: Improvements relating to appliances for distributing gases or liquids upon the surface of a volatile, inflammable or other liquid
IPC: A62C3/06
Filed: 1929-10-12
Abstract: 341,103. Distributing gases or liquids over inflammable or like liquids. McKEAN, J. M., 15, Cefn Parc, Skewen, Glamorgan. Oct. 12, 1929, No. 30979. [Class 47 (ii).] Apparatus for distributing gases or liquids over the surface of inflammable or volatile liquids held in tanks or the like, for extinguishing or preventing fire, or checking evaporation, com. prises a float a which is movable from place to place over the surface and carries a nozzle c discharging over its top plate. As shown, the float has a rim i, and a central sleeve b in which the nozzle is held by a collar d and nut e. The nozzle has two branches f, g to which flexible, telescopic, or jointed pipes k, l are attached for the supply of gases, or of two liquids which may react to form a foam. The float has a baffle plate h carried by struts j. In a modification, Fig. 5, the nozzle is held in the baffle plate n, and carries a shackle plate p to which is attached a cable q. This, together with the supply pipes k, l, passes over a grooved wheel t to winding drums v, w on a wheeled carriage s which is provided with an extensible jib r. By this arrangement, the float can be elevated, and then lowered upon the surface of the liquid in the tank.
Patent GB-1215865-A (GB)
Title: A method of operating a sedimentation apparatus
IPC: B01D21/00
Filed: 1968-06-28
Abstract: 1,215,865. Sedimentation control. REDERI AB NORDSTJERNAN. 28 June, 1968 [30 June, 1967], No. 30980/68. Heading BID. [Also in Division G1] Liquid containing suspended solids enters tank 5 at inlet 1, clarified liquid overflows at 2 and concentrated sludge is pumped out at 3, the inlet or sludge outlet flow being so controlled as to optimise separation, the sludge being then at its most concentrated consistent with a clear liquid effluent. Under these conditions a sharp level 4 is observed where solids concentration varies abruptly, and the flow is controlled to hold this level 4 between the mouths of two tubes 6 which are filled with clarified liquid and lead to an oil-filled inverted U-tube serving as a differential pressure gauge. The level of the oil-liquid interface is monitored by photocell 8 and used to control the sludge pump 9 automatically. Alternatively, the level is merely observed and control is manual. Sedimentation is assisted by vibrations applied directly to the liquid, at 10, or to the tank wall. The wide part of the righthand leg of the U-tube magnifies the interface movement in the left-hand leg as differential pressures vary. Fig. 5 shows a simple settling tank, but the invention also applies to a tank divided by inclined baffles into compartments which operate as parallel settling zones (Fig. 4, not shown).
Patent GB-1011005-A (GB)
Title: Spinning method
IPC: C08K5/00
Filed: 1963-08-06
Abstract: Acrylonitrile polymer compositions contain flame-retarding agents such as halogenated long chain fatty acid esters, aliphatic phosphates, halogenated aliphatic phosphates, and polymeric vinyl and vinylidene halides.  Specified compositions contain, dissolved in dimethyl acetamide, (1) polyvinyl chloride, antimony trioxide and a blend of a copolymer of acrylonitrile and vinyl acetate with a copolymer of acrylonitrile and methylvinyl pyridine; (2) tris-(beta-chloroethyl) phosphate and a copolymer of acrylonitrile and vinyl acetate; (3) tri-(2-ethylhexyl) phosphate and a blend of copolymer of acrylonitrile and vinyl acetate with a copolymer of acrylonitrile and methylvinyl pyridine; (4) chlorinated methyl stearate and a copolymer of acrylonitrile and vinyl acetate.  The compositions are wet-spun on to fibres (see Division B5).
Patent GB-380987-A (GB)
Title: Improvements in or relating to the production of lumps of pulverous material
IPC: B02C4/30
Filed: 1931-11-09
Abstract: 380,987. Briquetting coal &c. by extrusion machines. ANDREAS, A., 3, Engelstrasse, Munster, Westphalia, Germany. Nov. 9, 1931, No. 31057. Convention date, Nov. 8, 1930. [Class 87 (ii).] Apparatus for moulding pulverous material, such as ores, slags, coal powder, into lumps comprises two cylindrical rotary drums A, A<1> having apertures a, a<1> respectively, the drums being without gear teeth or interengaging projections, and the arrangement is such that apertures of one drum are offset from those of the other, and the material is pressed by the drums through the apertures into the interior whence the pressed lumps are removed. The material is fed by a hopper A<3> and the lumps fall out of the open ends A<6>, A<7> of the drums into conduits F, F<1>. A conduit F<2> is provided to receive material falling between the drums and a screw conveyor F<4> may be provided to feed it back to the hopper. The drums may be formed of ribs with sharp edges constituting the apertures, which may be of square, triangular, hexagonal or other shape. The apertures may be formed in metal bushes which may be interchangeable to provide larger or smaller apertures, and they are distributed in circles round the drums such that the distance between the circles at the middle is twice that at the ends so as to lessen the strain. Pipes B may be provided to add liquid such as crude oil or tar in the hopper to give a required consistency. Where liquid is not introduced, strippers may be provided within the drums. The drums may be mounted on shafts E, E<1> by naves E<2>, E<3> with spokes or discs E<4>, and the naves and sides may taper such that the internal cross-sectional area of the drums increases towards the ends to facilitate discharge of the lumps. The shafts may carry engaging gears C, C<1> or they are arranged so that an apertured zone of one drum is always met by a solid zone of the other. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a construction wherein projections on the drum surfaces engage depressions thereon, the apertures being provided in the depressions. This subject-matter does not appear in the Specification as accepted.